Honeywell Video Gaming Accessories W7750A Users Manual W7750A,B,C

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SYSTEM ENGINEERING

7

4

-

2

9

5

8

-

1

® U.S. Re

g

istered Trademark

Cop

y

ri

g

ht © 2000 Hone

y

well Inc. • All Ri

g

hts Reserved

Excel 10

W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

Contents

Introduction .................................................................................................................................. 6

Description of Devices.......................................................................................... 6

Control Application ............................................................................................... 7

Control Provided................................................................................................... 7

Products Covered................................................................................................. 8

Or

g

anization of Manual ........................................................................................ 8

Applicable Literature............................................................................................. 8

Product Names..................................................................................................... 9

A

g

enc

y

Listin

g

s .................................................................................................... 9

Abbreviations and Definitions............................................................................... 10

Construction ......................................................................................................... 11

Controllers ...................................................................................................... 11

PERFORMANCE SPECIFICATIONS ......................................................... 13

LONMARK® Functional Profile..................................................................... 17

Inputs/Outputs: ............................................................................................... 18

ANALOG INPUTS:...................................................................................... 18

DIGITAL INPUTS:....................................................................................... 19

TRIAC OUTPUTS ON THE

(

W7750B,C MODELS ONLY

)

:........................ 19

DIGITAL OUTPUTS:................................................................................... 19

Wall Modules .................................................................................................. 20

Duct Sensor .................................................................................................... 20

Confi

g

urations ...................................................................................................... 22

General ........................................................................................................... 22

Allowable Heatin

g

and Coolin

g

E

q

uipment Confi

g

urations ............................ 24

STAGED HEATING/COOLING CONTROL ................................................ 24

MODULATING HEATING/COOLING CONTROL ....................................... 24

HEAT PUMP CONTROL............................................................................. 24

ECONOMIZER CONTROL......................................................................... 25

PNEUMATIC ACTUATOR CONTROL........................................................ 25

MIXED-OUTPUT-TYPE CONTROL ........................................................... 26

Occupanc

y

Sensor ......................................................................................... 26

Window Open/Closed Di

g

ital Input ................................................................. 26

Wall Module Options ....................................................................................... 26

Dirt

y

Filter Monitor .......................................................................................... 27

Indoor Air Qualit

y

(

IAQ

)

Override ................................................................... 27

Smoke Control ................................................................................................ 27

Freeze Stat ..................................................................................................... 27

Modes of Operation.............................................................................................. 27

Application Steps .................................................................................................................................. 29

Overview .............................................................................................................. 29

Step 1. Plan the S

y

stem....................................................................................... 29

Step 2. Determine Other Bus Devices Re

q

uired.................................................. 29

Step 3. La

y

Out Communications and Power Wirin

g

........................................... 30

LONWORKS® Bus La

y

out ................................................................................ 30

Power Wirin

g

.................................................................................................. 32

POWER BUDGET CALCULATION EXAMPLE .......................................... 32

LINE LOSS ................................................................................................. 33

Step 4. Prepare Wirin

g

Dia

g

rams......................................................................... 35

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

72-2958—12

General Considerations .................................................................................. 35

W7750 Controllers .......................................................................................... 36

FACTORY DEFAULT DIGITAL OUTPUTS:................................................ 37

LONWORKS® Bus Termination Module ........................................................... 43

Step 5. Order E

q

uipment ..................................................................................... 45

Step 6. Confi

g

ure Controllers............................................................................... 48

Step 7. Troubleshootin

g

....................................................................................... 48

Troubleshootin

g

Excel 10 Controllers and Wall Modules ............................... 48

Temperature Sensor and Setpoint Potentiometer Resistance Ran

g

es .......... 49

Alarms ............................................................................................................ 49

Broadcastin

g

the Service Messa

g

e ................................................................ 50

W7750 Controller Status LED ........................................................................ 50

T7770C,D Wall Module B

y

pass Pushbutton and Override LED ..................... 51

T7560A,B Di

g

ital Wall Module B

y

pass Pushbutton and LCD Displa

y

Occupanc

y

S

y

mbols .......................................................................................................... 51

Appendices.................................................................................................................................. 51

Appendix A. Usin

g

E-Vision to Commission a W7750 Controller......................... 51

Sensor Calibration .......................................................................................... 51

Settin

g

the Pid Parameters ............................................................................ 51

Appendix B. Se

q

uences of Operation.................................................................. 52

Common Operations ...................................................................................... 53

Room Temperature Sensor

(

RmTemp

)

....................................................... 54

Remote Setpoint

(

RmtStptPot

)

................................................................... 55

Setpoint Limits

(

LoSetptLim and HiSetptLim

)

............................................. 55

B

y

pass Mode

(

StatusOvrd and StatusLed

)

................................................ 55

BYPASSTIME............................................................................................. 55

OverrideT

y

pe.............................................................................................. 55

OverridePriorit

y

........................................................................................... 55

C

y

cles per Hour

(

ubHeatCph and ubCoolCph

)

.......................................... 55

T7770C,D or T7560A,B Wall Module B

y

pass Pushbutton Operation......... 55

Standb

y

Mode

(

StatusOc

y

Sen

)

.................................................................. 56

Continuous Unoccupied Mode ................................................................... 56

Occupanc

y

Mode and Manual Override Arbitration.................................... 56

Time Clock

(

Occ_Time_Clock

)

................................................................... 57

Schedule Master

(

Sched_Master

)

.............................................................. 57

Setpoint Rampin

g

....................................................................................... 57

Recover

y

Rampin

g

for Heat Pump S

y

stems.............................................. 57

Fan Operation............................................................................................. 58

Window Sensor

(

StatusWndw

)

................................................................... 58

Smoke Control............................................................................................ 58

Demand Limit Control

(

DLC

)

...................................................................... 58

Dirt

y

Filter Monitor ...................................................................................... 59

Start-Up ...................................................................................................... 59

Temperature Control Operations .................................................................... 59

Sta

g

ed Coolin

g

Control .............................................................................. 60

Sta

g

ed Heatin

g

Control .............................................................................. 60

Cascade Control of Modulatin

g

Coolin

g

/Heatin

g

........................................ 61

Series 60 Modulatin

g

Control ..................................................................... 61

Pulse Width Modulatin

g

(

PWM

)

Control..................................................... 61

Outdoor Air Lockout of Heatin

g

/Coolin

g

..................................................... 61

Economizer Damper Control ...................................................................... 61

Indoor Air Qualit

y

(

IAQ

)

Override ............................................................... 62

Freeze Stat................................................................................................. 62

Dischar

g

e Air Low Limit Control ................................................................. 62

Economizer Enable/Disable Control........................................................... 62

Appendix C. Complete List of Excel 10 W7750 Controller User Addresses. ....... 62

User Address Indexes

(

all in alphabetical order

)

............................................ 63

Mappable User Addresses and Table Number ............................................... 64

Failure Detect User Addresses and Table Number ........................................ 65

Appendix D. Q7750A Excel 10 Zone Mana

g

er Point Estimatin

g

Guide...............109

Approximate Memor

y

Size Estimatin

g

Procedure. .........................................109

Appendix E. Sensor Data for Calibration. ............................................................ 110

Resistance Sensors. ...................................................................................... 110

Volta

g

e/Current Sensors. ............................................................................... 112

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

3 74-2958—1

List of Figures

Fi

g

. 1. T

y

pical s

y

stem overview. ................................................................................................................................................ 6

Fi

g

. 2. T

y

pical W7750 control application. ................................................................................................................................. 7

Fi

g

. 3. Excel 10 W7750A Constant Volume AHU Controller. ..................................................................................................... 12

Fi

g

. 4. W7750A construction in in.

(

mm

)

. ................................................................................................................................... 13

Fi

g

. 5. Excel 10 W7750B Constant Volume AHU Controller. ..................................................................................................... 14

Fi

g

. 6. Excel 10 W7750C Constant Volume AHU Controller. .................................................................................................... 15

Fi

g

. 7. W7750B,C construction in in.

(

mm

)

. W7750C

(

shown

)

has three 4 to 20 mA analo

g

outputs.

)

..................................... 16

Fi

g

. 8. DIN rail adapters. ............................................................................................................................................................ 17

Fi

g

. 9. Functional profile of LONMARK® RTU ob

j

ect details

(

variables not implemented in Excel 10 CVAHU

are

g

re

y

ed

)

........................................................................................................................................................................ 18

Fi

g

. 10. T7770A,B,C,D construction in in.

(

mm

)

. ....................................................................................................................... 20

Fi

g

. 11. T7560A,B construction in in.

(

mm

)

. ............................................................................................................................... 21

Fi

g

. 12. C7770A construction in in.

(

mm

)

. .................................................................................................................................. 21

Fi

g

. 13. Fan with two sta

g

es of heatin

g

and two sta

g

es

of coolin

g

........................................................................................................................................................................... 24

Fi

g

. 14. Fan, modulatin

g

heatin

g

and modulatin

g

coolin

g

. ......................................................................................................... 24

Fi

g

. 15. Heat pump with two compressors and auxiliar

y

heat sta

g

e

(

s

)

....................................................................................... 25

Fi

g

. 16. Economizer control. ...................................................................................................................................................... 25

Fi

g

. 17. Modulatin

g

heat with pneumatic valve actuator............................................................................................................. 26

Fi

g

. 18. Connectin

g

the portable operator terminal

to the LONWORKS® Bus..................................................................................................................................................... 29

Fi

g

. 19. Wirin

g

la

y

out for one doubl

y

terminated dais

y

-chain LONWORKS® Bus se

g

ment. ........................................................ 31

Fi

g

. 20. Wirin

g

la

y

out for two sin

g

l

y

terminated LONWORKS® Bus se

g

ments............................................................................. 32

Fi

g

. 21. NEMA class 2 transformer volta

g

e output limits............................................................................................................ 34

Fi

g

. 22. Power wirin

g

details for one Excel 10 per transformer. ................................................................................................. 34

Fi

g

. 23. Power wirin

g

details for two or more Excel 10s per transformer. .................................................................................. 34

Fi

g

. 24. Transformer power wirin

g

details for one Excel 10 used in UL 1995 e

q

uipment

(

U.S. onl

y)

......................................... 35

Fi

g

. 25. Attachin

g

two or more wires at terminal blocks.............................................................................................................. 36

Fi

g

. 26. W7750B Hi

g

h-Side/Low-Side selectable switchin

g

and

j

umper location....................................................................... 36

Fi

g

. 27. T

y

pical W7750A Controller AHU application wirin

g

dia

g

ram.

(

For more information on note 2,

refer to Fi

g

. 25.

)

................................................................................................................................................................ 38

Fi

g

. 28. T

y

pical W7750A Controller with separate transformer application wirin

g

dia

g

ram.

(

For more information on note 2, refer to Fi

g

. 25.

)

............................................................................................................ 38

Fi

g

. 29. W7750A Controller floatin

g

economizer damper wirin

g

dia

g

ram.

(

For more information on note 2, refer to Fi

g

. 25.

)

... 39

Fi

g

. 30. T

y

pical W7750B Controller with sta

g

ed heatin

g

and coolin

g

wirin

g

dia

g

ram.

(

For more information on note 2, refer to Fi

g

.

25.

)

.................................................................................................................................................................................... 40

Fi

g

. 31. W7750B Controller with floatin

g

heatin

g

, coolin

g

and economizer wirin

g

dia

g

ram.

(

For more information on note 2, refer

to Fi

g

. 25.

)

......................................................................................................................................................................... 40

Fi

g

. 32. W7750B,C Controller PWM damper actuator wirin

g

dia

g

ram.

(

For more information on note 2, refer to

Fi

g

. 25.

)

............................................................................................................................................................................. 41

Fi

g

. 33. W7750B,C wirin

g

dia

g

ram with 4 to 20 mA enthalp

y

sensors and di

g

ital inputs.

(

For more information on note 2, refer to

Fi

g

. 25.

)

............................................................................................................................................................................. 41

Fi

g

. 34. W7750B,C wirin

g

dia

g

ram with C7600C 4 to 20 mA solid state humidit

y

sensor.

(

For more information on note 2, refer to

Fi

g

. 25.

)

............................................................................................................................................................................. 42

Fi

g

. 35. W7750C Controller with 4-to-20 mA heatin

g

, coolin

g

and economizer wirin

g

dia

g

ram. AOs must use terminals 16, 17 or

18. The AOs can be set to be reverse actin

g

.

(

For more information on note 2, refer to Fi

g

. 25.

)

.................................... 42

Fi

g

. 36. Pneumatic transducer to W7750B,C

(

B shown, see trian

g

le note 4

)

. ......................................................................................................................................... 43

Fi

g

. 37. RP7517,B pneumatic transducer to W7750C................................................................................................................ 43

Fi

g

. 38. T

y

pical doubl

y

terminated dais

y

-chain LONWORKS® Bus se

g

ment termination module wirin

g

dia

g

ram. ..................... 44

Fi

g

. 39. LONWORKS® Bus termination wirin

g

options. ............................................................................................................... 45

Fi

g

. 40. Temperature sensor resistance plots............................................................................................................................. 49

Fi

g

. 41. Location of the Service Pin Button................................................................................................................................. 50

Fi

g

. 42. LED location on W7750................................................................................................................................................. 51

Fi

g

. 43. The T7770C,D Wall Modules LED and B

y

pass pushbutton locations........................................................................... 51

Fi

g

. 44. The T7560A,B Di

g

ital Wall Module B

y

pass pushbutton location................................................................................... 51

Fi

g

. 45. LED and B

y

pass pushbutton operation. ....................................................................................................................... 56

Fi

g

. 46. Setpoint rampin

g

parameters with ramp rate calculation............................................................................................... 57

Fi

g

. 47. Setpoint rampin

g

parameters with setpoint calculation.................................................................................................. 58

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

74-2958—14

Fi

g

. 48. Setpoint rampin

g

parameters with ramp rate calculation............................................................................................... 58

Fi

g

. 49. Schematic dia

g

ram for a t

y

pical W7750B Unit. .............................................................................................................59

Fi

g

. 50. Sta

g

ed output control versus PID Error. ....................................................................................................................... 60

Fi

g

. 51. Point capacit

y

estimate for Zone Mana

g

er. ..................................................................................................................109

Fi

g

. 52. Graph of Sensor Resistance versus Temperature......................................................................................................... 110

Fi

g

. 53. Graph of Sensor Resistance versus Temperature......................................................................................................... 110

Fi

g

. 54. Graph of Sensor Resistance versus Temperature......................................................................................................... 111

Fi

g

. 55. Graph of Sensor Resistance versus Temperature......................................................................................................... 111

Fi

g

. 56. Graph of Sensor Resistance versus Temperature......................................................................................................... 112

Fi

g

. 57. Graph of Sensor Volta

g

e versus Humidit

y

..................................................................................................................... 112

Fi

g

. 58. C7600C output current vs. humidit

y

............................................................................................................................... 112

Fi

g

. 59. Graph of Sensor Current versus Enthalp

y

(

volts

)

. ......................................................................................................... 113

Fi

g

. 60. Partial ps

y

chometric chart for a C7400A Solid State Enthalp

y

Sensor. ........................................................................114

Fi

g

. 61. C7400A Solid State Enthalp

y

Sensor output current vs. relative humidit

y

. ................................................................... 114

Fi

g

. 62. Graph of Sensor Volta

g

e versus CO2 concentration..................................................................................................... 115

Fi

g

. 63. Graph of Sensor Volta

g

e versus input Volta

g

e to A/D.................................................................................................. 115

Fi

g

. 64. Graph of Sensor Volta

g

e

(

Vdc

)

versus Pressure

(

Inw

)

.................................................................................................. 116

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

5 74-2958—1

List of Tables

Table 1. A

g

enc

y

Listin

g

. ............................................................................................................................................................. 9

Table 2. List of Differences in W7750A and W7750B,C Controllers........................................................................................... 11

Table 3. Common Confi

g

uration Options Summar

y

For W7750A,B,C Controllers..................................................................... 22

Table 4. Confi

g

uration Options Summar

y

For W7750A,B,C Controllers. ................................................................................... 23

Table 5. Modes Of Operation For The Excel 10 W7750 Controller . .......................................................................................... 27

Table 6. Application Steps.......................................................................................................................................................... 29

Table 7. LONWORKS® Bus Confi

g

uration Rules And Device Node Numbers............................................................................. 30

Table 8. VA Ratin

g

s For Transformer Sizin

g

. ............................................................................................................................. 33

Table 9. Field Wirin

g

Reference Table

(

Hone

y

well listed as AK#### or e

q

uivalent

)

.................................................................. 36

Table 10. W7750A Version I/O Description. ............................................................................................................................... 37

Table 11. Excel 10 W7750 Controller Orderin

g

Information. ...................................................................................................... 46

Table 12. Excel 10 Alarms.......................................................................................................................................................... 49

Table 14. Common Confi

g

uration Options Summar

y

For W7750A,B,C Controllers................................................................... 53

Table 15. Confi

g

uration Options Summar

y

For W7750A,B,C Controllers. ................................................................................. 54

Table 16. B

y

pass Pushbutton Operation.................................................................................................................................... 55

Table 17. Intersta

g

e Minimum Times.......................................................................................................................................... 60

Table 18. Excel 10 W7750 Controller User

Address Point T

y

pes................................................................................................................................................................... 62

Table 20. Input/Output Points..................................................................................................................................................... 67

Table 21. Control Parameters..................................................................................................................................................... 73

Table 22. Ener

gy

Mana

g

ement Points........................................................................................................................................ 78

Table 23. Status Points............................................................................................................................................................... 81

Table 24. Calibration Points........................................................................................................................................................ 93

Table 25. Confi

g

uration Parameters........................................................................................................................................... 94

Table 26. LONMARK®/Open S

y

stem Points. ............................................................................................................................... 97

Table 27. Direct Access And Special Points............................................................................................................................... 106

Table 28. Data Share Points....................................................................................................................................................... 108

Table 29. Sensor Resistance Versus Temperature.................................................................................................................... 110

Table 30. Sensor Resistance Versus Temperature.................................................................................................................... 110

Table 31. Sensor Resistance Versus Temperature.................................................................................................................... 111

Table 32. Sensor Resistance Versus Temperature.................................................................................................................... 111

Table 33. Sensor Resistance Versus Temperature.................................................................................................................... 111

Table 34. Sensor Volta

g

e Versus Humidit

y

. ............................................................................................................................... 112

Table 35. Sensor Volta

g

e Versus Humidit

y

. ............................................................................................................................... 112

Table 36. Sensor Current Versus Enthalp

y

(

volts

)

...................................................................................................................... 113

Table 37. Sensor Volta

g

e Versus CO2 Concentration. .............................................................................................................. 115

Table 38. Sensor Volta

g

e Versus Input Volta

g

e To A/D............................................................................................................. 115

Table 39. Sensor Volta

g

e

(

Vdc

)

Versus Pressure

(

Inw

)

. ............................................................................................................ 116

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

74-2958—16

INTRODUCTION

Description of Devices

The W7750 is the Constant Volume Air Handlin

g

Unit

(

CVAHU

)

Controller in the Excel 10 product line famil

y

. The

CVAHU is a LONMARK compliant device desi

g

ned to control

sin

g

le zone and heat pump air handlers. W7750 s

y

stems

control the space temperature in a

g

iven zone b

y

re

g

ulatin

g

the heatin

g

and coolin

g

e

q

uipment in the air handler that

delivers air to that space. The W7750 air handler is t

y

picall

y

an all-in-one constant air volume packa

g

ed unit, located on

the roof of the buildin

g

. In addition to standard heatin

g

and

coolin

g

control, the W7750 provides man

y

options and

advanced s

y

stem features that allow state-of-the-art

commercial buildin

g

control. The W7750 Controller is capable

of stand-alone operation; however, optimum functional

benefits are achieved when the network communication

capabilities are used. The W7750 utilizes the Echelon

LONWORKS network

(

LONWORKS Bus

)

for communications,

and conforms with the LONMARK HVAC Interoperabilit

y

standard for Roof Top Unit Controllers

(

see Fi

g

. 9

)

.

The T7770 or T7560 direct-wired Wall Modules are used in

con

j

unction with W7750 Controllers. The zone controlled b

y

the W7750 Controller t

y

picall

y

can use a T7770A throu

g

h D or

a T7560A,B Wall Module. Additional features available in

T7770A throu

g

h D models include analo

g

setpoint input knob,

override di

g

ital input pushbutton, override status LED and

LONWORKS Bus network access

j

ack. Additional features

available in T7560A,B models include analo

g

setpoint input

knob, override di

g

ital input pushbutton, humidit

y

sensor

(

T7650B model

)

, override status LCD and di

g

ital displa

y

.

The Q7750A Excel 10 Zone Mana

g

er is a communications

interface that allows devices on the LONWORKS Bus network

to communicate with devices on the standard EXCEL 5000

S

y

stem C-Bus. Fi

g

. 1 shows an overview of a t

y

pical s

y

stem

la

y

out. The Q7750A also provides some control and

monitorin

g

functions.

Fig. 1. Typical system overview.

PERSONAL COMPUTER TOOLS

E-VISION

CARE

Q7752A

LONWORKS BUS

SERIAL

ADAPTER

EXCEL 10

Q7750A

ZONE

MANAGER

C-BUS COMMUNICATION NETWORK

EXCEL 500

EXCEL BUILDING SUPERVISOR

C-BUS TO LONWORKS BUS

INTERFACE DEVICE

EXCEL 10 W7751F

PANEL PLENUM

MOUNT VERSION

VARIABLE AIR VOLUME

CONTROLLER

LONWORKS-BUS COMMUNICATIONS NETWORK LONWORKS BUS COMMUNICATIONS NETWORK

Q7751A

FTT

LONWORKS BUS

ROUTER

EXCEL 10 T7770

WALL MODULE EXCEL 10 T7560A, B

WALL MODULE

M17487

EXCEL 10

W7750B

CVAHU

CONTROLLER

123456789

10 11 12 13 1415J3

31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16

Q7740A

2-WAY

REPEATER

Excel 10 W7750A,B,C Constant Volume AHU Controller

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

7 74-2958—1

Control Application

W7750 s

y

stems in commercial buildin

g

s t

y

picall

y

incorporate

a packa

g

ed air handler s

y

stem that delivers a constant

volume of air at preconditioned temperatures to the zone

bein

g

served. Each zone is usuall

y

serviced b

y

a separate

AHU; however, sometimes two or more AHUs service the

same zone. Note that the W7750 is not desi

g

ned to control

Variable Air Volume

(

VAV

)

air handlers or Multi-Zone air

handlers, where one air handler simultaneousl

y

controls the

space temperature in man

y

zones.

The W7750 can control sta

g

ed or modulatin

g

heatin

g

and

coolin

g

coils, mixed air economizer dampers, and the s

y

stem

fan. Control of heat pump units, where the compressor

(

s

)

is

used for both coolin

g

and heatin

g

, is also provided. The zone

the W7750 services can use a T7770 or T7650 for space

temperature sensin

g

and an LONWORKS Bus network access

for users. Fi

g

. 2 shows a t

y

pical W7750 control application.

Fig. 2. Typical W7750 control application.

Control Provided

The W7750 Controller is desi

g

ned to control a sin

g

le air

handler to maintain the units space temperature at the current

setpoint. Heatin

g

and coolin

g

control is provided for either

sta

g

ed or modulatin

g

e

q

uipment. Up to four sta

g

es of

mechanical coolin

g

and up to four sta

g

es of heatin

g

are

allowed. Modulatin

g

outputs can be either

floating type

such

as a Series 60 control, or Pulse Width Modulated

(

PWM

W7750B,C onl

y)

control.

The economizer dampers can be controlled directl

y

with

floatin

g

or PWM outputs, or indirectl

y

usin

g

a di

g

ital output as

an enable/disable si

g

nal to a packa

g

ed economizer controller.

The economizer enable function, which decides when to allow

outdoor air to be used for free coolin

g

, can be confi

g

ured to

one of ten strate

g

ies based on the inputs. For more details,

see Appendix B—Se

q

uences of Operation. When the

economizer position is controlled from the W7750, the

minimum position settin

g

(

for ventilation re

q

uirements

)

can be

ad

j

usted based on indoor air

q

ualit

y

(

IAQ

)

needs in the space.

IAQ monitorin

g

is provided throu

g

h either a CO2 sensor or a

di

g

ital input from a space-mounted IAQ limit switch.

For heat pump confi

g

urations, up to four compressors can be

controlled, alon

g

with up to four sta

g

es of auxiliar

y

heat, and a

heat/cool chan

g

e over valve. Includin

g

the suppl

y

fan, the

combination of these items ma

y

not exceed ei

g

ht outputs if a

W7750B,C is used, or six outputs for a W7750A.

(

The ei

g

ht

outputs on the W7750C consist of five di

g

ital and three analo

g

outputs.

)

WINDOW CONTACT

OCCUPANCY

SENSOR

M

OA TEMP

FILTER

FAN

COOL

COIL

HEAT

COIL

DA TEMP

RA TEMP

EXCEL 10

W7750

CVAHU

T7770 OR T7560A,B

RETURN

AIR DISCHARGE

AIR

OUTDOOR

AIR

CEILING

ROOF

-+

M17488

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

74-2958—18

Like the W7751 VAV Box Controller, the W7750 Controller can

monitor a space-mounted occupanc

y

sensor, and a door/

window contact. These inputs affect the operational mode of

the controller

(

see Table 5 for a list of all possible modes of

operation

)

.

The W7750 Controller allows other controllers in the s

y

stem to

use the W7750s ph

y

sical inputs and outputs. A di

g

ital input

and an analo

g

input can be confi

g

ured to read switch states

and volta

g

e sensor values, respectivel

y

, and send them out

over the LONWORKS Bus network. The Q7750A Zone

Mana

g

er can use these values in custom control strate

g

ies.

Additionall

y

, two of the W7750 di

g

ital outputs are available for

control pro

g

ram use. These outputs onl

y

respond to si

g

nals

sent over the network, and are not controlled b

y

the W7750

internal control al

g

orithms.

Products Covered

This S

y

stem En

g

ineerin

g

Guide describes how to appl

y

the

Excel 10 famil

y

of W7750 CVAHU Controllers and related

accessories to t

y

pical applications. The specific devices

covered include:

•W7750A,B,C Controllers.

•T7770A throu

g

h D Wall Modules.

•T7560A,B Wall Modules.

•Q7750A Excel 10 Zone Mana

g

er.

•Q7751A,B Router

(

FTT to FTT and TPT to FTT

)

.

•Q7752A Serial Interface.

•Q7740A,B Repeaters

(

2-wa

y

and 4-wa

y)

.

•209541B FTT Termination Module.

Organization of Manual

This manual is divided into three basic parts: the Introduction,

the Application Steps, and the Appendices that provide

supportin

g

information. The Introduction and Application

Steps 1 throu

g

h 5 provide the information needed to make

accurate material orderin

g

decisions. Application Step 6 and

the Appendices include confi

g

uration en

g

ineerin

g

that can be

started usin

g

Excel E-Vision PC Software after the devices

and accessories are ordered. Application Step 7 is

troubleshootin

g

.

The or

g

anization of the manual assumes a pro

j

ect is bein

g

en

g

ineered from start to finish. If an operator is addin

g

to, or is

chan

g

in

g

an existin

g

s

y

stem, the Table of Contents can

provide the relevant information.

Applicable Literature

The followin

g

list of documents contains information related to

the Excel 10 W7750 CVAHU Controller and the EXCEL 5000

OPEN SYSTEM in

g

eneral.

Form No. Title

74-2956 Excel 10 W7750A,B,C Controller Specification

Data

74-2697 Excel 10 T7770A,B,C,D,E,F,G Wall Module

Specification Data

74-3097 T7560A,B Di

g

ital Wall Module Specification

Data

74-2950 Excel 10 Q7750A, Zone Mana

g

er Specification

Data

74-2952 Excel 10 Q7751A,B Router Specification Data

74-2954 Excel 10 Q7752A Serial Interface Specification

Data

74-3067 Q7752B PCMCIA LONWORKS PCC-10 Card

Specification Data

74-2858 Excel 10 Q7740A,B FTT Repeaters

Specification Data

74-2951 Excel 10 Q7750A Zone Mana

g

er Checkout

and Test Manual

95-7521 Excel 10 W7750A,B,C Controller Installation

Instructions

95-7538 Excel 10 T7770A,B,C,D,E,F,G Wall Module

Installation Instructions

95-7620 T7560A,B Di

g

ital Wall Module Installation

Instructions

95-7509 Excel 10 Q7750A Zone Mana

g

er Installation

Instructions

95-7510 Excel 10 Q7751A,B Router Installation

Instructions

95-7511 Excel 10 Q7752A Serial Interface Installation

Instructions

95-7613 Q7752B PCMCIA LONWORKS PCC-10 Card

Installation Instructions

95-7555 Excel 10 Q7740A,B FTT Repeaters Installation

Instructions

95-7554 Excel 10 209541B Termination Module

Installation Instructions

74-2588 Excel E-Vision User’s Guide

74-5587 CARE User’s Manual

74-1392 CARE Excel 10 Zone Mana

g

er User’s Guide

74-5577 CARE Icon Guide

74-2039 XBS User’s Manual

74-5018 XBS Application Guide

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

9 74-2958—1

Product Names

The W7750 Controller is available in three models:

•W7750A Constant Volume AHU Controller - W7750A

Version.

•W7750B Constant Volume AHU Controller - W7750B

Version.

•W7750C Constant Volume AHU Controller - W7750C

Version.

The T7770 Wall Module is available in four models. The

T7770 Wall Modules will work with all Excel 5000 and Excel

10 Controllers

(

except the W7751A,C,E,G

)

:

•T7770A1xxx Wall Module with nonlinearized 20 Kohm

NTC sensor onl

y

.

•T7770A2xxx Wall Module with nonlinearized 20 Kohm

NTC sensor and LONWORKS Bus

j

ack.

•T7770B1xxx Wall Module with nonlinearized 20 Kohm

NTC sensor, 10 Kohm setpoint, and LONWORKS Bus

j

ack.

•T7770C1xxx Wall Module with nonlinearized 20 Kohm

NTC sensor, 10 Kohm setpoint, b

y

pass button and LED,

and LONWORKS Bus

j

ack.

•T7770D1xxx Wall Module with nonlinearized 20 Kohm

NTC sensor, b

y

pass button and LED, and LONWORKS Bus

j

ack.

NOTE: The T7770B,C Models are available with a absolute

55 to 85°F

(

10 to 85°C

)

or a relative scale plate

ad

j

ustable in E-Vision to ± 18°F

(

± 5°C

)

.

The T7560A,B Wall Module is available in two models:

•T7560A Wall Module displa

y

s and provides space

temperature, setpoint, Occ/Unocc override, override status

LCD and di

g

ital displa

y

.

•T7560B Wall Module displa

y

s and provides space

temperature, humidit

y

sensor, setpoint, Occ/Unocc

override, override status LCD and di

g

ital displa

y

.

Other products:

•Q7750A Excel 10 Zone Mana

g

er.

•Q7751A,B Bus Router.

•Q7752A Serial Adapter.

•Q7740A,B FTT Repeaters.

•209541B FTT Termination Module.

Refer to Table 11 in Application Step 5. Order E

q

uipment for a

complete listin

g

of all available part numbers.

NOTE: The Q7750A Zone Mana

g

er is referred to as

(

E-Link

)

in internal software and CARE.

Agency Listings

Table 1 provides information on a

g

enc

y

listin

g

s for Excel 10

products. Be sure to alwa

y

s follow Local Electrical Codes.

Table 1. Agency Listing.

Device Agency Comments

W7750A,B,C Controllers UL Tested and listed under UL916

(

file number E87741

)

. The CVAHU W7750A,B,C

Controllers are UL94-5V listed and suitable for plenum mountin

g

.

cUL Listed

(

E87741

)

.

CE General Immunit

y

per European Consortium Standards EN50081-1

(

CISPR 22, Class B

)

and EN 50082-1:1992

(

based on Residential, Commercial, and Li

g

ht Industrial

)

.

EN 61000-4-2: IEC 1000-4-2

(

IEC 801-2

)

Electroma

g

netic Dischar

g

e.

EN 50140, EN 50204: IEC 1000-4-3

(

IEC 801-3

)

Radiated Electroma

g

netic Field.

EN 61000-4-4: IEC 1000-4-4

(

IEC 801-4

)

Electrical Fast Transient

(

Burst

)

. Radiated Emissions and

Conducted Emissions:

EN 55022: 1987 Class B.

CISPR-22: 1985.

FCC Complies with re

q

uirements in FCC Part 15 rules for a Class B Computin

g

Device.

Operation in a residential area can cause interference to radio or TV reception and re

q

uire

the operator to take steps necessar

y

to correct the interference.

T7770A,B,C,D and

T7560A,B Wall Modules UL

(

Not applicable.

)

cUL

(

Not applicable.

)

FCC

(

Not applicable.

)

Q7750A Excel 10

Zone Manager UL Tested and listed under UL916, file number S4804

(

QVAX, PAZY

)

.

CSA Listin

g

pendin

g

.

FCC Complies with re

q

uirements in FCC Part 15 rules for a Class A Computin

g

Device.

Operation in a residential area can cause interference to radio or TV reception and re

q

uire

the operator to take steps necessar

y

to correct the interference.

Q7740A,B FTT

Repeaters, Q7751A,B

Routers and

UL UL1784.

Q7752A Serial Adapter CSA Listed.

FCC Complies with re

q

uirements in FCC Part 15 rules for a Class B Computin

g

Device.

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

74-2958—110

Abbreviations and Definitions

AHUAir Handlin

g

Unit; the central fan s

y

stem that includes

the blower, heatin

g

e

q

uipment, coolin

g

e

q

uipment,

ventilation air e

q

uipment, and other related e

q

uipment.

COCarbon Monoxide. Occasionall

y

used as a measure of

indoor air

q

ualit

y

.

CO2Carbon Dioxide. Often used as a measure of indoor air

q

ualit

y

.

CAREComputer Aided Re

g

ulation En

g

ineerin

g

; the PC

based tool used to confi

g

ure C-Bus and LONWORKS Bus

devices.

C-BusHone

y

well proprietar

y

Control Bus for

communications between EXCEL 5000 S

y

stem

controllers and components.

CPUCentral Processin

g

Unit; an EXCEL 5000 OPEN

SYSTEM controller module.

cULUnderwriters Laboratories Canada

CVAHUConstant Volume AHU; refers to a t

y

pe of air

handler with a sin

g

le-speed fan that provides a constant

amount of suppl

y

air to the space it serves.

DDFDelta De

g

rees Fahrenheit.

D/XDirect Expansion; refers to a t

y

pe of mechanical coolin

g

where refri

g

erant is

(

expanded

)

to its cold state, within a

heat-exchan

g

in

g

coil that is mounted in the air stream

supplied to the conditioned space.

EchelonThe compan

y

that developed the LONWORKS Bus

and the Neuron chips used to communicate on the

LONWORKS Bus.

EconomizerRefers to the mixed-air dampers that re

g

ulate

the

q

uantit

y

of outdoor air that enters the buildin

g

. In

cool outdoor conditions, fresh air can be used to

supplement the mechanical coolin

g

e

q

uipment.

Because this action saves ener

gy

, the dampers are

often referred to as

economizer dampers

.

EMIElectroma

g

netic Interference; electrical noise that can

cause problems with communications si

g

nals.

E-LinkRefers to the Q7750A Zone Mana

g

er. This name is

used in internal software and in CARE software.

EMSEner

gy

Mana

g

ement S

y

stem; refers to the controllers

and al

g

orithms responsible for calculatin

g

optimum

operational parameters for maximum ener

gy

savin

g

s in

the buildin

g

.

EEPROMElectricall

y

Erasable Pro

g

rammable Read Onl

y

Memor

y

; the variable stora

g

e area for savin

g

user

setpoint values and factor

y

calibration information.

EnthalpyThe ener

gy

content of air measured in BTUs per

pound

(

KiloJoules per Kilo

g

ram

)

.

EPROMErasable Pro

g

rammable Read Onl

y

Memor

y

; the

firmware that contains the control al

g

orithms for the

Excel 10 Controller.

Excel 10 Zone ManagerA controller that is used to

interface between the C-Bus and the LONWORKS Bus.

The Excel 10 Zone Mana

g

er also has the functionalit

y

of an Excel 100 Controller, but has no ph

y

sical I/O

points.

NOTE: The Q7750A Zone Mana

g

er can be referred to as

E-Link in the internal software, CARE.

E-VisionUser interface software used with devices that

operate via the FTT LONWORKS Bus communications

protocol.

FirmwareSoftware stored in a nonvolatile memor

y

medium

such as an EPROM.

Floating ControlRefers to Series 60 Modulatin

g

Control of

a valve or damper. Floatin

g

Control utilizes one di

g

ital

output to pulse the actuator open, and another di

g

ital

output to pulse it closed.

FTTFree Topolo

gy

Transceiver.

IAQIndoor Air Qualit

y

. Refers to the

q

ualit

y

of the air in the

conditioned space, as it relates to occupant health and

comfort.

I/OInput/Output; the ph

y

sical sensors and actuators

connected to a controller.

I x RI times R or current times resistance; refers to Ohms

Law: V = I x R.

KDe

g

rees Kelvin.

Level IVRefers to a classification of di

g

ital communication

wire. Formerl

y

known as UL Level IV, but

not

e

q

uivalent

to Cate

g

or

y

IV cable. If there is an

y

q

uestion about wire

compatibilit

y

, use Hone

y

well-approved cables

(

see Step

5 Order E

q

uipment section

)

.

LONWORKS BusEchelons LONWORKS network for

communication amon

g

Excel 10 Controllers.

LONWORKS Bus SegmentAn LONWORKS Bus section

containin

g

no more than 60 Excel 10s. Two se

g

ments

can be

j

oined to

g

ether usin

g

a router.

NECNational Electrical Code; the bod

y

of standards for

safe field-wirin

g

practices.

NEMANational Electrical Manufacturers Association; the

standards developed b

y

an or

g

anization of companies

for safe field wirin

g

practices.

NodeA Communications Connection on a network; an

Excel 10 Controller is one node on the LONWORKS Bus

network.

NVNetwork Variable; an Excel 10 parameter that can be

viewed or modified over the LONWORKS Bus network.

PCAn Personal Computer with Pentium processor capable

of runnin

g

Microsoft Windows 95.

PotPotentiometer. A variable resistance electronic

component located on the T7770B,C or T7560A,B Wall

Modules; used to allow user-ad

j

usted setpoints to be

input into the Excel 5000 or Excel 10 Controllers.

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

11 74-2958—1

PWMPulse Width Modulated output; allows analo

g

modulatin

g

control of e

q

uipment usin

g

a di

g

ital output

on the controller.

RTDResistance Temperature Detector; refers to a t

y

pe of

temperature sensor whose resistance output chan

g

es

accordin

g

to the temperature chan

g

e of the sensin

g

element.

SubnetA LONWORKS Bus se

g

ment that is separated b

y

a

router from its Q7750A Zone Mana

g

er.

TODTime-Of-Da

y

; the schedulin

g

of Occupied and

Unoccupied times of operation.

TPTTwisted Pair Transceiver.

VAVolt Amperes; a measure of electrical power output or

consumption as applies to an ac device.

VacVolta

g

e alternatin

g

current; ac volta

g

e rather than dc

volta

g

e.

VAVVariable Air Volume; refers to either a t

y

pe of air

distribution s

y

stem, or to the W7751 Excel 10 VAV Box

Controller that controls a sin

g

le zone in a variable air

volume deliver

y

s

y

stem.

VOCVolatile Or

g

anic Compound; refers to a class of

common pollutants sometimes found in buildin

g

s.

Sources include out-

g

assin

g

of construction materials,

production-line b

y

-products, and

g

eneral cleanin

g

solvents. A VOC is occasionall

y

used as a measure of

indoor air

q

ualit

y

.

W7750The model number of the Excel 10 CVAHU

Controllers

(

also see CVAHU

)

.

W7751The model number of the Excel 10 VAV Box

Controllers

(

also see VAV

)

.

Wall ModuleThe Excel 10 Space Temperature Sensor and

other optional controller inputs are contained in the

T7770 or the T7560A,B Wall Modules. See Application

Step 5. Order E

q

uipment for details on the various

models of Wall Modules.

XBSExcel Buildin

g

Supervisor; a PC based tool for

monitorin

g

and chan

g

in

g

parameters in C-Bus devices.

Construction

Controllers

The Excel 10 W7750 Controller is available in three different

models. The W7750A Model, which is a low cost controller

made for simple sin

g

le zone air handlers and heat pump

controls. The W7750B,C Models are intended for more

complex applications.

The W7750B,C Models use Triacs for their di

g

ital outputs,

where as the W7750A Model uses dr

y

-contact rela

y

s. The

W7750C Model also has three analo

g

outputs available on

terminals 16, 17 and 18.

All wirin

g

connections to the controller are made at screw

terminal blocks. Connection for operator access to the

LONWORKS Bus is provided b

y

plu

gg

in

g

the SLTA connector

cable into the LONWORKS Bus communications

j

ack.

The W7750A,B,C Models consist of a sin

g

le circuit board that

is mounted in a sheet metal subbase and protected b

y

a

factor

y

snap-on cover. The three controllers have the same

ph

y

sical appearance except for terminals 16 throu

g

h 20

(

W7750A

)

and different labels next to the wirin

g

terminals

(

see Fi

g

. 3, 5 or 6

)

. Wires are attached to the screw terminal

blocks on both sides of the controller. The controllers mount

with two screws

(

see Fi

g

. 4 or 7

)

. The W7750 can also be

mounted usin

g

DIN rail. To mount the W7750 on DIN rail,

purchase two DIN rail adapters

(

obtain locall

y)

part number

TKAD, from Thomas and Betts, see Fi

g

. 8, then snap onto

standard EN 50 022 35 mm b

y

7.5 mm

(

1-3/8 in. b

y

5/16 in.

)

DIN rail. DIN rail is available throu

g

h local suppliers.

A channel in the cover allows the controller status LED to be

visible when the cover is in place. There are no field-

serviceable parts on the circuit board and, therefore,

it is

intended that the cover never be removed

.

The W7750A,B,C can be mounted in an

y

orientation.

Ventilation openin

g

s were desi

g

ned into the cover to allow

proper heat dissipation re

g

ardless of the mountin

g

orientation.

See Fi

g

. 4 and 7.

The input/output and control differences between the two

models are summarized in Table 2. The I/O points in Table 2

are the free I/O points that are not reserved for Wall Module

use.

Table 2. List of Differences in W7750A and W7750B,C Controllers.

*The T7770 or the T7560 Wall Modules includes I/O points for

two analo

g

inputs for the space temperature and the setpoint

knob, a di

g

ital input for the B

y

pass pushbutton, and a di

g

ital

output for the LED B

y

pass Indicator. These W7750 I/O

points are confi

g

urable, but are normall

y

used for the Wall

Module.

W7750A Model W7750B,C Models

Digital Outputs Six Rela

y

Outputs Ei

g

ht Triac Outputs

Digital Inputs Two Four

Wall Module One* One*

Analog Outputs None Three 4 to 20 mA Outputs

(

W7750C onl

y)

Analog Inputs One

(

Resistive Input Onl

y)

Four

(

Two Resistive and two Volta

g

e/Current Inputs

)

DC Power None 20 Vdc available to power optional sensors

Floating (Series 60) Control Economizer Onl

y

Heatin

g

, Coolin

g

, and/or Economizer

PWM Control None Heatin

g

, Coolin

g

, and/or Economizer

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

74-2958—112

Fig. 3. Excel 10 W7750A Constant Volume AHU Controller.

123456789

10 11 12 13 14 15 J3

31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16

E

GND LED

SNSR

GND

SET PT

AI-1

OHM GND DI-1 GND GND DI-2

NOT

USED

L

ON

W

ORKS

BUS

L

ON

JACK

W1 W2Y1 Y2 GNETWORK

DO Rc Rh 24

VAC

W7750A

24

VAC

COM

NOT

USED NOT

USED

NOT

USED

NOT

USED

NOT

USED

BYPASS

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

13 74-2958—1

Fig. 4. W7750A construction in in. (mm).

PERFORMANCE SPECIFICATIONS

Power:

24 Vac with a minimum of 20 Vac and a maximum of 30 Vac at

either 50 or 60 Hz. The W7750A power consumption is 6 VA

maximum at 50 or 60 Hz. The W7750B,C power consumption

is 12 VA maximum at 50 or 60 Hz.The W7750A,B,C is a NEC

Class 2 rated device. This listin

g

imposes limits on the amount

of power the product can consume or directl

y

control to a total

of 100 VA.

Special Note for the W7750B,C Unit:

The individual Triac outputs incorporate an internal common

connection with the input power transformer. The Triacs

provide a switched path from the hot side

(

R

)

of the

transformer throu

g

h the load to the common of the

transformer. The W7750B,C Controller desi

g

n

must

use the

same power transformer for an

y

loads connected to that

controller; see Fi

g

. 30.

Each individual Triac is rated 1A at 30 Vac maximum. Under

all operatin

g

conditions, the maximum load/source power

bud

g

et for the W7750B,C Controller is 100 VA. Actual

allowable Triac current is 500 mA MAX.

123456789101112131415J3

E

GND LED BYPASS SNSR GND SET PT AI-1

OHM GND DI-1 GND GND DI-2 NOT

USED

L

ON

W

ORKS

BUS LON

JACK

31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16

WI W2 Y1 Y2 G

NEYWORK

DO Rc Rh 24

VAC

5-3/16 (132)

5-5/8

(143)

3-1/16

(77)

2-1/8

(54)

6 (152)

M10098B

24

VAC

COM

NOT

USED NOT

USED

NOT

USED NOT

USED

NOT

USED

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

74-2958—114

Fig. 5. Excel 10 W7750B Constant Volume AHU Controller.

CPU:

Motorola or Toshiba 3150 Neuron processor, containin

g

three

ei

g

ht-bit CPUs. Each Neuron has a uni

q

ue 48-bit network

identification number.

Memory Capacity:

64K ROM/PROM

(

6K reserved for network operations, 58K

usable for control al

g

orithm code

)

.

512 b

y

tes EEPROM.

2K RAM.

Specified Space Temperature Sensing Range:

45 to 99°F

(

7 to 37°C

)

with an allowable control setpoint ran

g

e

from 50 to 90°F

(

10 to 32°C

)

when initiated from the network

and 55 to 85°F

(

13 to 29°C

)

when confi

g

ured and connected

to T7770 or T7560 Wall Modules.

M6854B

123456789

10 11 12 13 14 15 J3

31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16

E

GND LED BYPASS SNSR SET PT AI-1

OHM A1-2

OHM AI-3

V/mA AI-4

V/mA 20VDC

OUT

DI-4

DI-3

DI-2 DI-1 VAC

24

VAC

24

COM 1

OUT 2

OUT 3

OUT

4

OUT

5

OUT 6

OUT 7

OUT 8

OUT

AI

GND AI

GND AI

GND

LONWORKS

BUS

LON

JACK

DI

GND DI

GND

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

15 74-2958—1

Fig. 6. Excel 10 W7750C Constant Volume AHU Controller.

M17489

123456789

10 11 12 13 14 15 J3

31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16

E

GND LED BYPASS SNSR SET PT AI-1

OHM A1-2

OHM AI-3

V/mA AI-4

V/mA 20VDC

OUT

DI-4

DI-3

DI-2 DI-1 VAC

24

VAC

24

COM 1

OUT 2

OUT 3

OUT

4

OUT

5

OUT A0

1A0

2A0

3

AI

GND AI

GND AI

GND

LONWORKS

BUS

LON

JACK

DI

GND DI

GND

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

74-2958—116

Fig. 7. W7750B,C construction in in. (mm). W7750C (shown) has three 4 to 20 mA analog outputs.)

Communications:

The W7750A,B,C Controller uses a Free Topolo

gy

Transceiver

(

FTT

)

transformer-coupled communications port

runnin

g

at 78 kilobits per second

(

kbps

)

. Usin

g

the

transformer-coupled communications interface offers a much

hi

g

her de

g

ree of common-mode noise re

j

ection while

ensurin

g

dc isolation.

Approved cable t

y

pes for LONWORKS Bus communications

wirin

g

is Level IV 22 AWG

(

0.34 mm2

)

plenum or nonplenum

rated unshielded, twisted pair, solid conductor wire. For

nonplenum areas, use Level IV 22 AWG

(

0.34 mm2

)

such as

U.S. part AK3781

(

one pair

)

or U.S. part AK3782

(

two pair

)

. In

plenum areas, use plenum-rated Level IV, 22 AWG

(

0.34

mm2

)

such as U.S. part AK3791

(

one pair

)

or U.S. part

AK3792

(

two pair

)

.

(

See Tables 9 and 11 for part numbers.

)

Contact Echelon Corp. Technical Support for the

recommended vendors of Echelon approved cables.

123456789101112131415J3

E

GND

LED

BYPASS

SNSR

AI

GND AI

GND AI

GND

SET PT

AI-1

OHM

AI-2

OHM

AI-3

V/mA

AI-4

V/mA

20VDC

OUT

L

ON

W

ORKS

BUS

L

ON

JACK

31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16

DI-4 DI

GND

DI-3 DI-2 DI

GND

DI-1VAC

24

VAC

24

COM

1

OUT

2

OUT

3

OUT

4

OUT

5

OUT

A0

1A0

2

A0

3

5-3/16 (132)

5-5/8

(143)

3-1/16

(77)

2-1/8

(54)

6 (152)

M17490

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

17 74-2958—1

Fig. 8. DIN rail adapters.

The FTT supports polarit

y

insensitive free topolo

gy

wirin

g

.

This frees the s

y

stem installer from wirin

g

usin

g

a specific bus

topolo

gy

. T-tap, star, loop, and mixed wirin

g

topolo

g

ies are all

supported b

y

this architecture. The maximum LONWORKS Bus

len

g

th when usin

g

a combination of T-tap, star, loop, and bus

wirin

g

(

sin

g

l

y

terminated

)

is 1640 ft.

(

500m

)

with the maximum

node-to-node len

g

th of 1312 ft.

(

400m

)

. In the event that the

total wire len

g

th is exceeded, then a Q7740A 2-Wa

y

Repeater

or a Q7740B 4-Wa

y

Repeater can be used to allow the

number of devices to be spread out as well as increasin

g

the

len

g

th of wire over which the

y

communicate. The maximum

number of repeaters per se

g

ment is one

(

on either side of the

router

)

. A Q7751A,B LONWORKS Bus Router can also be used

to effectivel

y

double the maximum LONWORKS Bus len

g

th.

The advanta

g

e of usin

g

the router is that it se

g

re

g

ates traffic

to a se

g

ment while when usin

g

the repeater, all traffic is

repeated on each se

g

ment. When utilizin

g

a doubl

y

terminated LONWORKS Bus structure, use a continuous dais

y

-

chain with no stubs or taps from the main backbone, The

maximum LONWORKS Bus len

g

th is 4593 ft.

(

1400m

)

with the

maximum node-to-node len

g

th of 3773 ft.

(

1150m

)

.

FTT networks are ver

y

flexible and convenient to install and

maintain, but it is imperative to carefull

y

plan the network

la

y

out and create and maintain accurate documentation. This

aids in compliance verification and future expansion of the

FTT network. This also keeps unknown or inaccurate wire run

len

g

ths, node-to-node

(

device-to-device

)

distances, node

counts, total wire len

g

th, inaccurate repeater/router locations,

and misplaced or missin

g

terminations minimized. Refer to

LONWORKS Bus Wirin

g

Guidelines form, 74-2865 for complete

description of network topolo

gy

rules.

LONMARK® FUNCTIONAL PROFILE

W7750 Controllers support the LONMARK Functional Profile

number 8030 Roof Top Unit Controller, version 1.0

(

see Fi

g

. 9

)

.

M6857

1

2

3

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

74-2958—118

Fig. 9. Functional profile of LONMARK® RTU object details

(variables not implemented in Excel 10 CVAHU

are greyed).

Environmental:

Operatin

g

Temperature: -40 to 150°F

(

-40 to 65.5°C

)

.

Shipping Temperature:

-40 to 150°F

(

-40 to 65.5°C

)

.

Relative Humidity:

5% to 95% noncondensin

g

.

Vibration:

Rated V2 level compliant.

Inputs/Outputs:

The W7750A Unit supports the followin

g

hardware features:

•Three 20 Kohm NTC

(

1000 throu

g

h 150,000 ohm

)

or

PT3000

(

250 throu

g

h 12,000 ohm

)

resistive analo

g

inputs

(

one reserved for space temperature and one reserved for

the setpoint knob

)

.

•Three dr

y

contact di

g

ital inputs

(

one reserved for the

B

y

pass pushbutton

)

.

•LED di

g

ital output

(

only

for the wall module LED

)

2.5V at 3

mA.

•Six 24 Vac rela

y

di

g

ital outputs

(

1.5A rela

y

s rated at 7.5A

inrush current

)

.

The W7750B,C Units support the followin

g

hardware features:

•Four 20 Kohm NTC

(

1000 throu

g

h 150,000 ohm

)

or

PT3000

(

250 throu

g

h 12,000 ohm

)

resistive analo

g

inputs

(

one reserved for space temperature and one reserved for

the setpoint knob

)

.

•Two 0.2 to 10 VDC or 2 to 20 mA

(

user selectable

)

analo

g

inputs.

•Five dr

y

contact di

g

ital inputs

(

one reserved for the B

y

pass

pushbutton

)

.

•Ei

g

ht on the W7750B

(

five on the W7750C

)

24 Vac Triac

di

g

ital outputs

(

500 mA MAX

)

. The W7750C Unit also

supports three 4 to 20 mA analo

g

outputs.

•LED di

g

ital output

(

only

for the wall module LED, T7770

models or LCD, T7560A,B

)

2.5V at 3 mA.

•One 20 Vdc power suppl

y

for auxiliar

y

devices with a

maximum current of 50 mA.

ANALOG INPUTS:

NOTE: Onl

y

one of each t

y

pe of input is allowed. For

example, onl

y

one Outdoor Air Temperature sensor

is allowed. No duplicate Outdoor Air Temperature

sensors are usable on the same controller.

Space Temperature:

T

y

pe: RTD.

Supported Sensors: T7770A,B,C,D; T7560A,B.

Discharge Air Temperature:

T

y

pe: RTD.

Supported Sensors: C7100A1015*, C7770A1006,

C7031B1033, C7031C1031, C7031D1062, C7031F1018

(

W7750B,C onl

y)

, C7031J1050, C7031K1017.

Outdoor Air Temperature:

T

y

pe: RTD.

Supported Sensors: C7170A1002.

Return Air Temperature:

T

y

pe: RTD.

Supported Sensors: C7100A1015*, C7770A1006,

C7031B1033, C7031C1031, C7031D1062, C7031F1018

(

W7750B,C onl

y)

, C7031J1050, C7031K1017.

*The PT3000 sensor is not recommended for floatin

g

control

(

real time - dischar

g

e or return confi

g

ured as space sensor

)

.

The PT3000 sensor is intended for monitorin

g

or differential

(

sta

g

ed

)

control

Hardware

Output

Roof Top Unit

Controller number 8030

Mandatory

Network

Variables

Manufacturer

Defined

Section

Optional

Network

Variables

nv9 nviOutsideRH

SNVT_lev_percent

nv8 nviOutsideTemp

SNVT_ temp_p

nv7 nviSetPtOffset

SNVT_ temp_p

nv6 nviOccCmd

SNVT_occupancy

nv5 nviApplicMode

SNVT_hvac_mode

nv16 nvoCO2

SNVT_ppm

nv12 nvoOutsideRH

SNVT_ lev_percent

nv11 nvoOutsideTemp

SNVT_ temp_p

nv10 nvoEffectSetPt

SNVT_ temp_p

nv2 nviSetPoint

SNVT_temp_p

nv1 nviSpaceTemp

SNVT_temp_p

nv4 nvoUnitStatus

SNVT_hvac_status

nv3 nvoSpaceTemp

SNVT_ temp_p

nv13 nviSpaceRH

SNVT_ lev_percent

nv14 nviCO2

SNVT_ppm

Hardware

Input

nc42 - CO2Limit

nc49 - Send Heartbeat (mandatory)

nc60 - Occupancy Temperature Setpoints (optional)nc48 - Maximum Receive Time

nc17 - Location

(mandatory)

(optional)

(mandatory)

Configuration Properties

nv15 nviEmergCmd

SNVT_hvac_emerg

M11580

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

19 74-2958—1

Outdoor Air Humidity (W7750B,C

only):

T

y

pe: Volta

g

e/Current.

Supported Sensors: C7600B1000 and C7600B1018

(

2 to 10V

)

, C7600C1008

(

4 to 20mA

)

.

Return Air Humidity (W7750B,C

only):

T

y

pe: Volta

g

e/Current.

Supported Sensors: C7600B1000 and C7600B1018

(

2 to 10V

)

, C7600C1008

(

4 to 20mA

)

.

Outdoor Air Enthalpy (W7750B,C

only):

T

y

pe: Current.

Supported Sensors: C7400A1004

(

4 to 20mA

)

.

Return Air Enthalpy (W7750B,C

only):

T

y

pe: Current.

Supported Sensors: C7400A1004

(

4 to 20mA

)

.

Air Filter Differential Pressure (W7750B,C

only):

T

y

pe: Volta

g

e.

Supported Sensors: Third part

y

2 to 10V, 0 to 5 inw

(

1.25 kPa

)

differential pressure sensors.

CO2 Sensor (W7750B,C

only):

T

y

pe: Volta

g

e.

Supported Sensors: Third part

y

0 to 10V, 0 to 2000 ppm

CO2 sensors.

Monitor Sensor for network use (W7750B,C

only):

T

y

pe: Volta

g

e.

Supported Sensors: Third part

y

2 to 10V, 2 to 10 volts

displa

y

ed.

DIGITAL INPUTS:

NOTE: Onl

y

one of each t

y

pe of input is allowed. For

example, onl

y

one Smoke Monitor is allowed. No

duplicate Smoke Monitors are usable on the same

controller.

Dr

y

-contact inputs are sensed usin

g

a 9 milliamp at 4.8 volts

detection circuit. It is ver

y

important that the device used

contains hi

g

h

q

ualit

y

, noncorrodin

g

contacts with resistivit

y

that does not de

g

rade; that is, increase over time. Use noble

metal

(

such as

g

old or silver

)

, or pimpled or sealed contacts to

assure consistent, lon

g

-term operation.

Two of the followin

g

Di

g

ital Inputs

(

DIs

)

can be confi

g

ured

when usin

g

the W7750A, and four of the followin

g

when usin

g

the W7750B,C:

—Fan Status:

Contact Closed = Fan on

—IAQ Switch:

Contact Closed = Poor Air Qualit

y

—Time Clock:

Contact Closed = Occupied Mode; Contact Open =

Unoccupied Mode

—Schedule Master:

Contact Closed = Local time clock is used as master time

clock

—Economizer Enable Si

g

nal:

Contact Closed = Economizer Enabled for coolin

g

use

—Smoke Monitor:

Contact Closed = Smoke Detected

—Dirt

y

Filter:

Contact Closed = Dirt

y

Filter

—Shutdown Si

g

nal:

Contact Closed = Shut off all e

q

uipment

—Occupanc

y

Switch:

Contact Closed = Room is Occupied; Contact Open =

Room is Unoccupied

—Window Monitor:

Contact Closed = Window is Closed

—Coil Freeze Stat:

(

Onl

y

use this DI when usin

g

E-Vision.

)

Contact Closed = Coil Freeze condition sensed

—Wall Module B

y

pass Pushbutton:

Momentar

y

DI

(

See Appendix B—Se

q

uences of Operation

for b

y

pass details.

)

TRIAC OUTPUTS ON THE (W7750B,C MODELS ONLY):

—Power ratin

g

s: 20 Vac to 30 Vac at 25 mA MIN to 500 mA

MAX current for an

y

volta

g

e.

CAUTION

When an

y

device is ener

g

ized b

y

a Triac, the device

must be able to sink a minimum of 25 mA.

NOTE: Triacs sink current to the 24 Vac common

(

COM

terminal on the W7750B,C Models

)

; see Fi

g

. 30 for

wirin

g

example.

IMPORTANT

If non-Honeywell motors, actuators, or transducers

are to be used with Excel 10 Controllers, Triac com-

patibility must be verified (see previous NOTE).

DIGITAL OUTPUTS:

COOL STAGE 1

COOL STAGE 2

COOL STAGE 3

COOL STAGE 4

HEAT STAGE 1

HEAT STAGE 2

HEAT STAGE 3

HEAT STAGE 4

CHANGE OVER RELAY

FAN

AUX ECON

OCCUPANCY STATUS

ECON OPEN

ECON CLOSE

COOL OPEN

COOL CLOSE

HEAT OPEN

HEAT CLOSE

HEAT COOL STAGE 1

HEAT COOL STAGE 2

HEAT COOL STAGE 3

HEAT COOL STAGE 4

FREE1

(

NOTE:

Free1

,

Free1 Pulse On

and

Free1 Pulse Off

are three separate and uni

q

ue di

g

ital output points. Because

the

y

are not related, the

y

all can be confi

g

ured in a CVAHU

controller at the same time.

)

FREE2

FREE1 PULSE ON

FREE1 PULSE OFF

ECON PWM

HEAT PWM

COOL PWM

UNUSED

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

74-2958—120

Wall Modules

The T7770 or T7560 Wall Modules for the Excel 5000 and

Excel 10 Controllers are available in a variet

y

of

confi

g

urations. The models T7770A1006 and T7770C1002

are shown in Fi

g

. 10. The T7770B,D are the same ph

y

sical

size

(

see Product Names section for differences

)

. The models

T7560A1016 and T7560B1018 are shown in Fi

g

. 11. The

T7560A,B are the same ph

y

sical size.

Duct Sensor

The dimensions of the C7770A duct-mounted sensor are

shown in Fi

g

. 12.

Fig. 10. T7770A,B,C,D construction in in. (mm).

STANDARD

UTILITY

CONDUIT

BOX (2 X 4)

MOUNTING

HOLES

KNOCKOUTS FOR EUROPEAN

APPLICATIONS

3-5/32 (80)

2-3/8 (60)

29/32

(23)

5-1/16

(128)

2-3/8

(60)

T7770A1006

M15119

STANDARD

UTILITY

CONDUIT

BOX (2 X 4)

MOUNTING

HOLES

KNOCKOUTS FOR EUROPEAN

APPLICATIONS

3-5/32 (80)

2-3/8 (60)

1-1/4

(32)

5-1/16

(128)

2-3/8

(60)

T7770C

70

65

60

55 85

80

75

DIP Switch S4 Settings:

1,3,5=on; 2,4=off 2,4=on; 1,3,5=off 1,2,3,4=on; 5=0ff

W7753

XL600-XL20

W7752

LED RETURN

BYPASS

LED

FAN

SETPT

SENSOR

GND

LED

SETPT

SENSOR

AL COM

LED

SETPT

SENSOR

GND

BYPASS/FAN BYPASS/FAN

9 8 7 6 5 4 3 2 1

E-BUS

E-BUS

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

21 74-2958—1

Fig. 11. T7560A,B construction in in. (mm).

Fig. 12. C7770A construction in in. (mm).

3-15/16 (99) 1-3/16 (30)

4-1/8

(104)

M17479

3-7/8 (97)

2-11/16 (68)

4

(100)

3-7/16

(86)

12345678

1/2 IN. (13)

DIAMETER

1/4 (6)

DIAMETER (2 HOLES)

3/8 IN. (10)

DIAMETER

6-5/32 (156)

M7724

3-1/2 (89)

1/2 (13)

1/2 (13)

8-1/2 (216)

7/8

(22)

3/4 (19)

1-1/2 (38)

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

74-2958—122

Configurations

General

Tables 3 and 4 provide an overview of the Excel 10 W7750

confi

g

uration options. All W7750s are assumed to have a

suppl

y

fan di

g

ital output. Additionall

y

, Tables 3 and 4 list the

g

eneral mechanical e

q

uipment options available with the

W7750 Controller. See Application Step 6. Confi

g

ure

Controllers, for further information on confi

g

urations.

CAUTION

For floatin

g

control, the Excel 10 W7750 Controller is

desi

g

ned to work onl

y

with Series 60 valve and

damper actuators. Full stroke actuator drive-time must

be between 20 and 240 seconds

(

0.25 to 4.0 minutes

)

.

Table 3. Common Configuration Options Summary For W7750A,B,C Controllers.

Option Possible Configurations Common To All W7750 Models

Supply Fan 1. Mandator

y

Di

g

ital Output.

Type of Air Handler 1. Conventional.

2. Heat Pump.

Occupancy Sensor 1. None.

2. Connected: Contacts closed e

q

uals Occupied.

3. Network

(

Occ/Unocc si

g

nal received via the LONWORKS Bus network

)

.

Window Sensor 1. None.

2. Ph

y

sicall

y

Connected: Contacts closed e

q

uals window closed.

3. Network

(

Window Open/Closed si

g

nal received via the LONWORKS Bus

)

.

Wall Module Option 1. Local

(

direct wired to the controller

)

.

(

The T77560A,B has no LONWORKS Bus access

)

2. Network

(

sensor value received via the LONWORKS Bus

)

.

Wall Module Type 1. Sensor onl

y

.

(

All wall modules have a LONWORKS Bus access 2. Sensor and Setpoint ad

j

ust.

j

ack except T7560A,B

)

3. Sensor, Setpoint ad

j

ust and B

y

pass.

4. Sensor and B

y

pass.

Smoke Emergency Initiation 1. None.

2. Ph

y

sicall

y

Connected: Contacts closed e

q

uals smoke detected.

3. Network

(

Emer

g

enc

y

/Normal si

g

nal received via the LONWORKS Bus

)

.

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

23 74-2958—1

Table 4. Configuration Options Summary For W7750A,B,C Controllers.

Option Possible Configurations for the

W7750A Model Possible Configurations for the W7750B,C Models

Type of 1. One sta

g

e. 1. One sta

g

e.

Heating 2. Two sta

g

es. 2. Two sta

g

es.

3. Three sta

g

es. 3. Three sta

g

es.

4. Four sta

g

es. 4. Four sta

g

es.

5. None. 5. Series 60 Modulatin

g

electric valve, or pneumatic via transducer.

6. Pulse Width Modulatin

g

electric valve, or pneumatic via transducer.

7. None.

Type of 1. One sta

g

e. 1. One sta

g

e.

Cooling 2. Two sta

g

es. 2. Two sta

g

es.

3. Three sta

g

es. 3. Three sta

g

es.

4. Four sta

g

es. 4. Four sta

g

es.

5. None. 5. Series 60 Modulatin

g

electric valve, or pneumatic via transducer.

6. Pulse Width Modulatin

g

electric valve, or pneumatic via transducer.

7. None.

Type of

Economizer 1. Di

g

ital Output Enable/Disable

si

g

nal for controllin

g

an external

economizer packa

g

e.

1. Di

g

ital Output Enable/Disable si

g

nal for controllin

g

an external

economizer packa

g

e.

2. Series 60 Modulatin

g

electric

damper motor, or pneumatic via

transducer.

2. Series 60 Modulatin

g

electric damper motor, or pneumatic via

transducer.

3. None. 3. Pulse Width Modulatin

g

electric damper motor, or pneumatic via

transducer.

4. None.

IAQ Option 1. None. 1. None.

2. Local IAQ Di

g

ital Input—directl

y

wired to the controller.

(

Contacts

closed means poor IAQ is

detected.

)

2. Local IAQ Di

g

ital Input—directl

y

wired to the controller.

(

Contacts

closed means poor IAQ is detected.

)

3. Network

(

IAQ Override si

g

nal

received via the LONWORKS Bus

)

.3. Network

(

IAQ Override si

g

nal received via the LONWORKS Bus

)

.

4. Local CO2 Analo

g

Input—directl

y

wired to the controller.

(

The sensor

must be a 0 to 10V device representin

g

0 to 2000 PPM CO2.

)

Coil Freeze 1. None. 1. None.

Stat Option 2. Local Coil Freeze Stat Di

g

ital

Input—directl

y

wired to the controller.

(

Contacts closed means that coil

freeze condition is sensed.

)

2. Local Coil Freeze Stat Di

g

ital Input—directl

y

wired to the controller.

(

Contacts closed means that coil freeze condition is sensed.

)

Filter Monitor 1. None. 1. None.

Option 2. Local Dirt

y

Filter Di

g

ital

Input—directl

y

wired to the

controller.

(

Contacts closed means

that the filter is dirt

y

.

)

2. Local Dirt

y

Filter Di

g

ital Input—directl

y

wired to the controller.

(

Contacts closed means that the filter is dirt

y

.

)

3. Local Analo

g

Input for Differential Pressure across the Filter

(

directl

y

wired to the controller

)

. The sensor must be a 2 to 10V device

representin

g

0 to 5 inw

(

1.25 kPa

)

.

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

74-2958—124

Allowable Heating and Cooling Equipment

Configurations

Each W7750 device can control a variet

y

of different t

y

pes of

mechanical coolin

g

and heatin

g

e

q

uipment within roof top air

handlers. See Fi

g

. 13 throu

g

h 17 for a conceptual overview of

some t

y

pical confi

g

urations. For specific wirin

g

details, see

the Prepare Wirin

g

Dia

g

rams section.

STAGED HEATING/COOLING CONTROL

Sta

g

ed e

q

uipment control is available for up to four sta

g

es of

heatin

g

or four sta

g

es of coolin

g

. On the W7750, the sta

g

es

are activated throu

g

h di

g

ital outputs

(

Triacs on the W7750B,C

and dr

y

-contact rela

y

s on the W7750A

)

one for each sta

g

e

wired to 24 Vac contactors

(

see Fi

g

. 27 and 30 in Step 4.

Prepare Wirin

g

Dia

g

rams section for wirin

g

details

)

. Note that

the number of ph

y

sical Di

g

ital Outputs

(

DOs

)

on the controller

limits the total number of sta

g

es that can be controlled. For

example, the W7750A Model has six di

g

ital outputs, and

because one is used for the suppl

y

fan, there are five DOs

available for an

y

combination of heatin

g

and coolin

g

sta

g

es

(

with a maximum of four sta

g

es of heatin

g

and four sta

g

es for

coolin

g)

. The W7750B Model offers two additional DOs, for a

total of ei

g

ht. The W7750C offers five DOs and three Analo

g

Outputs

(

AOs

)

. Fi

g

. 13 shows a t

y

pical application of two

sta

g

es of heat and two sta

g

es of coolin

g

.

Fig. 13. Fan with two stages of heating and two stages

of cooling.

MODULATING HEATING/COOLING CONTROL

The W7750 Controller provides modulatin

g

e

q

uipment control

for heatin

g

and coolin

g

e

q

uipment

(

and economizer dampers,

see Fi

g

. 16

)

usin

g

either Series 60 Floatin

g

Control or Pulse

Width Modulated

(

PWM

)

control,

(

PWM control is available on

the W7750B,C

only

)

. The Series 60 Modulatin

g

Control is

provided throu

g

h two Rela

y

di

g

ital outputs on the W7750A or

two Triac di

g

ital outputs on the W7750B,C

(

one to pulse the

valve actuator open and one to pulse it closed

)

. PWM control

positions the actuator based on the len

g

th, in seconds, of the

pulse from the di

g

ital output. For PWM, the controller outputs

a pulse whose len

g

th consists of two parts, a minimum and a

maximum. The minimum pulse time represents the analo

g

value of 0 percent and the maximum pulse len

g

th that

represents an analo

g

value of 100 percent. If the analo

g

value

is

g

reater than 0 percent, an additional time is added to the

minimum pulse time. The len

g

th of time added is directl

y

proportional to the ma

g

nitude of the analo

g

value. The PWM

actuator will be

g

in to use the analo

g

value at the end of the

pulse and will continue to use this value until a new pulse is

received. Refer to Appendix B under PWM Control for an

example. Series 60 actuators are

g

enerall

y

less expensive

than those for PWM, but the trade-off is that PWM re

q

uires

onl

y

a sin

g

le controller di

g

ital output while floatin

g

control

uses two DOs. Refer to Appendix B under Series 60

Modulatin

g

Control for an example. Fi

g

. 14 illustrates a

s

y

stem with modulatin

g

heatin

g

and coolin

g

(

see Fi

g

. 29 and

31 in Step 4. Prepare Wirin

g

Dia

g

rams section.

Fig. 14. Fan, modulating heating and modulating cooling.

NOTE: Pneumaticall

y

actuated valves can be controlled

usin

g

a pneumatic transducer device. See Fi

g

. 17.

Also, transducer devices are available from third

part

y

vendors to convert PWM outputs to a volta

g

e

or current si

g

nal if desired.

HEAT PUMP CONTROL

The W7750 Controller handles heat pump applications

similarl

y

to sta

g

ed heatin

g

/coolin

g

control. Heat pump

applications are supported b

y

providin

g

outputs for up to four

compressor sta

g

es, a chan

g

e-over rela

y

for the refri

g

erant

reversin

g

valve, and up to four sta

g

es of auxiliar

y

heat. Note

that the W7750A Model has six di

g

ital outputs, and therefore,

with one DO used for the suppl

y

fan and one for the chan

g

e-

over rela

y

, there are four outputs available for an

y

combination of compressors and auxiliar

y

heat sta

g

es. The

W7750B Model offers two additional DOs for a total of ei

g

ht,

while the W7750C Model offers five DOs and 3 AOs. Fi

g

. 15

illustrates a t

y

pical heat pump s

y

stem with auxiliar

y

heat.

M17491

MIXED

AIR

HEAT

COIL

COOL

COIL

DISCHARGE

AIR

W1 W2

Y1 Y2

-+

FAN

FAN

STARTER

COMPRESSORS

GAS COMBUSTION

CONTROLS

EXCEL 10

CVAHU

W7750A,B,C

T7560A,B OR T7770

MIXED

AIR

HEAT

COIL

COOL

COIL

DISCHARGE

AIR

-+

FAN

FAN

STARTER

CHILLED

WATER

VALVE

HOT

WATER

VALVE

M17492

EXCEL 10

CVAHU

W7750A,B,C

T7560A,B OR T7770

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

25 74-2958—1

Fig. 15. Heat pump with two compressors and auxiliary

heat stage(s).

ECONOMIZER CONTROL

Economizer control is available concurrentl

y

with an

y

confi

g

uration in the W7750 when DOs are not all used b

y

the

heatin

g

and coolin

g

e

q

uipment. Two t

y

pes of economizer

controls are supported b

y

the W7750 Controller, modulatin

g

control and enable/disable control. Modulatin

g

control can be

either Series 60 Floatin

g

Control or PWM control

(

PWM

control is available on the W7750B,C

only

)

. A dischar

g

e air

temperature sensor is re

q

uired for modulatin

g

economizer

damper control. Enable/disable control is provided to emulate

the Hone

y

well T7300 thermostat economizer operation,

where a DO tracks the occupanc

y

status of the controller. An

external packa

g

ed economizer control then modulates the

dampers. For modulatin

g

control, the economizer is enabled

or disabled based on one of ten available strate

g

ies

(

see

Appendix B—Se

q

uences of Operation—Economizer Enable/

Disable Control section, for further details

)

. Fi

g

. 16 illustrates

a s

y

stem with modulatin

g

economizer dampers

(

see Fi

g

. 29,

31, 32 and 35 in Step 4. Prepare Wirin

g

Dia

g

rams section, for

wirin

g

details

)

.

Fig. 16. Economizer control.

PNEUMATIC ACTUATOR CONTROL

The W7750B,C Controller can control pneumatic actuators for

an

y

or all of the three modulatin

g

outputs provided b

y

the

control al

g

orithm

(

heat, cool and economizer

)

. Control of

pneumatic water/steam valves and damper actuators is

provided throu

g

h a transducer device usin

g

either Series 60

Floatin

g

Control or PWM DOs. A floatin

g

-to-pneumatic, or a

PWM-to-pneumatic transducer is re

q

uired for each output

si

g

nal. The W7750A Controller can drive Series 60 Floatin

g

Control to modulate coolin

g

valves, heatin

g

valves and

economizers. There are no PWM outputs confi

g

urable on the

W7750A model.

For pro

j

ects with existin

g

pneumaticall

y

actuated reheat

valves, the Excel 10 W7750 Controller output must be

converted to a pneumatic si

g

nal usin

g

a transducer device

developed for use with Excel 10 Controllers. The transducer is

MIXED

AIR

AUXILIARY

HEAT

STAGE(S)

SHARED

HEAT AND

COOL COIL

DISCHARGE

AIR

+

FAN

FAN

STARTER

COMPRESSOR AND

CHANGEOVER VALVE

COMP 1

COMP 2

CHANGEOVER

RELAY

M17493

EXCEL 10

CVAHU

W7750A,B,C T7560A,B OR T7770

OUTDOOR

AIR

RETURN

AIR

HEAT

COIL

COOL

COIL

DISCHARGE

AIR

-+

FAN

FAN

STARTER

DISCHARGE

TEMPERATURE

SENSOR REQUIRED

FOR ECONOMIZER

CONTROL

M

PWM OR

SERIES 60

FLOATING

MOTOR

M17494

EXCEL 10

CVAHU

W7750A,B,C

T7560A,B OR T7770

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

74-2958—126

available throu

g

h Hone

y

well, or directl

y

from the

manufacturer, Mamac S

y

stems

(

see Table 11 for orderin

g

information

)

.

Fi

g

. 17 depicts a t

y

pical W7750 S

y

stem with modulatin

g

heatin

g

valve usin

g

a pneumatic valve actuator. Also see Fi

g

.

36 for wirin

g

an MMC325 Pneumatic Transducer to a

W7750A,B,C Controller and Fi

g

. 37 for wirin

g

a RP7517B

Pneumatic Transducer to a W7750C Controller.

NOTE: When choosin

g

the pneumatic pressure ran

g

e, make

sure that the close-off pressure is 2 to 3 psi

g

reater

than that of the sprin

g

ran

g

e. When usin

g

a sprin

g

ran

g

e of 5 to 10 psi with 10 psi as the closed posi-

tion,

do not

use the 0 to 10 psi model of the MMC325

Transducer; use the 0 to 20 psi transducer as the

recommended selection.

Fig. 17. Modulating heat with pneumatic valve actuator.

MIXED-OUTPUT-TYPE CONTROL

The W7750B,C Controller provides control for mixed-output-

t

y

pes of applications such as PWM heatin

g

and sta

g

ed

coolin

g

control occurrin

g

simultaneousl

y

with Series 60

Floatin

g

Economizer Damper Control.

Occupancy Sensor

Excel 10 W7750 Controllers provide a di

g

ital input for

connection to an occupanc

y

sensor. This is a device, such as

a passive infrared motion detector, that contains a dr

y

contact

(

see followin

g

NOTE

)

closure to indicate whether or not

people are present in the space. The Excel 10 W7750

Controller expects a contact closure to indicate the space is

Occupied. See Fi

g

. 27 throu

g

h 35 in Application Step 4,

Prepare Wirin

g

Dia

g

rams, for details on wirin

g

connections.

The control al

g

orithm in the Excel 10 Controller uses the

occupanc

y

sensor, if confi

g

ured, to determine the Effective

Occupanc

y

(

see Table 5

)

mode of operation. If the Time Of

Da

y

(

TOD

)

schedule indicates an Occupied state, and the

occupanc

y

sensor contact is closed, the Effective Occupanc

y

mode is Occupied. However, if the TOD schedule indicates an

Occupied state and the occupanc

y

sensor contact is open,

then the Effective Occupanc

y

mode is STANDBY. The

temperature control al

g

orithm is then controlled to the

STANDBY Coolin

g

and Heatin

g

Setpoints.

If the occupanc

y

sensor is not confi

g

ured, a local controller

can be put in the STANDBY mode onl

y

b

y

either a one-to-one

association of the occupanc

y

sensor from another Excel 10

Controller to the local controller, or b

y

receivin

g

the STANDBY

mode si

g

nal via the LONWORKS Bus.

NOTE: The Excel 10 Controller has limited power available

(

onl

y

9 mA at 4.8 volts

)

for checkin

g

the di

g

ital inputs

for contact closures. It is ver

y

important that the

device used contains hi

g

h

q

ualit

y

, noncorrodin

g

contacts with resistivit

y

that does not de

g

rade; that

is, increase over time. Use noble metal

(

such as

g

old

or silver

)

, or pimpled or sealed contacts to assure

consistent, lon

g

-term operation.

The recommended devices for use with the Excel 10 W7750

Controllers are the EL7628A1007 Ceilin

g

Mounted Infrared or

the EL7680A1008 Wall Mounted Wide View Infrared

Occupanc

y

Sensors. If ultrasonic sensors are re

q

uired, the

EL7611A1003 and the EL7612A1001 Occupanc

y

Sensors are

recommended. An EL76XX Power Suppl

y

/Control Unit is

re

q

uired for use with these occupanc

y

sensors. The

EL7630A1003 can power up to four sensors, and is multi-

tapped for several line volta

g

es. The EL7621A1002 can

power three sensors and it connects to 120 Vac line volta

g

e.

The EL7621A1010 can also power three sensors but it

connects to 277 Vac line volta

g

e.

Window Open/Closed Digital Input

A di

g

ital input is also provided for detectin

g

whether a window

in the space was opened. The Excel 10 W7750 Controller can

be connected to a dr

y

contact

(

see the followin

g

NOTE and

Fi

g

. 27 throu

g

h 35 in Application Step 4. Prepare Wirin

g

Dia

g

rams, for details

)

or a set of contacts wired in series

(

for

monitorin

g

multiple windows

)

to verif

y

that the window

(

s

)

are

closed. The al

g

orithm expects a contact closure to indicate

the window is closed. If an open window is detected, the

al

g

orithm chan

g

es the mode of operation to

FREEZE_PROTECT, which shuts down the control functions,

and watches for low space temperature conditions. The frost

protection setpoint is 46.4°F

(

8°C

)

, and the frost alarm occurs

at 42.8°F

(

6°C

)

.

NOTE:

(

This is the same NOTE as in the Occupanc

y

Sensor

section.

)

The Excel 10 has limited power available

(

onl

y

9 mA at 4.8 volts

)

for checkin

g

the di

g

ital inputs

for contact closures. It is ver

y

important that the

device used contains hi

g

h

q

ualit

y

, noncorrodin

g

contacts with resistivit

y

that does not de

g

rade; that

is, increase over time. Use noble metal

(

such as

g

old

or silver

)

, or pimpled or sealed contacts to assure

consistent, lon

g

-term operation.

Wall Module Options

As previousl

y

discussed, there are four basic varieties of the

T7770 Wall Modules and two of the T7560 Di

g

ital Wall Module

(

see the Product Names and the Construction sections

)

. Also,

a T7770 and T7560 Wall Modules can be shared amon

g

two

or more W7750s. The control al

g

orithm must be

g

iven this

wall module information when confi

g

urin

g

the W7750

(

see

Excel E-Vision User’s Guide, form 74-2588

)

.

VALVE

PNEUMATIC

ACTUATOR

PNEUMATIC

TRANSDUCER

MMC325

M

1

1

PNEUMATIC MAIN OR BRANCH LINE MUST BE 1/4 IN. (6 MM)

OR LARGER TUBING. A MINIMUM OF 6 FT (1.8M) OF TUBING

IS NEEDED IN A BRANCH LINE.

MIXED

AIR

HEAT

COIL

DISCHARGE

AIR

+

FAN

FAN

STARTER

M17495

T7560A,B OR T7770

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

27 74-2958—1

Dirty Filter Monitor

The air filter in the air handler can be monitored b

y

the W7750

and an alarm is issued when the filter media needs

replacement. The two methods of monitorin

g

the filter are:

1. Connectin

g

a differential pressure switch to a di

g

ital

input on the W7750A or W7750B,C.

2. Wirin

g

a 2 to 10V differential pressure sensor to a

volta

g

e input on the W7750B,C. If the analo

g

input

sensor is used, its measured value 0 to 5 inw

(

0 to 1.25

kPa

)

is compared to a user-selectable setpoint

(

FltrPressStPt—valid ran

g

e: 0 to 5 inw

(

0 to 1.25 kPa

))

,

and the Dirt

y

Filter alarm is issued when the pressure

drop across the filter exceeds the setpoint.

Indoor Air Quality (IAQ) Override

The Excel 10 W7750 Controller provides IAQ ventilation

control usin

g

one of two different methods of detectin

g

poor

air

q

ualit

y

. The first is with an IAQ switch device connected to

a di

g

ital input on the W7750 Controller, where a contact

closure indicates poor air

q

ualit

y

, and initiates the IAQ

Override mode. The device can detect poor air

q

ualit

y

usin

g

an

y

desired measure such as CO2, VOC, CO, etc. The

second method, which is onl

y

available on the W7750B,C, is

throu

g

h an analo

g

input that connects to a CO2 sensor

(

2 to

10V

)

. The measured value of CO2 from this sensor

(

0 to 2000

PPM

)

is compared to the setpoint

(

IAQSetpt

)

. When the CO2

level is hi

g

her than the setpoint

(

800 PPM

adjustable

)

, the

IAQ Override is initiated. The IAQSetpt h

y

steresis is 50 PPM,

IAQ Override is deactivated at a CO2 level less than 50 PPM

below setpoint.

The effect of initiatin

g

the IAQ Override mode is that the

economizer dampers are allowed to open above the standard

minimum position settin

g

to allow more fresh air to enter the

buildin

g

. See Appendix B—Se

q

uences of Operation, for

further control details.

Smoke Control

The Excel 10 W7750 Controller supports smoke-related

control strate

g

ies that are initiated either via a network

command

(

DestEmer

g

Cmd

)

or from a local

(

ph

y

sicall

y

connected

)

smoke detector di

g

ital input. The details of the

W7750 smoke-related control operation are described in

Appendix B—Se

q

uences of Operation.

Freeze Stat

A freeze stat can be monitored b

y

the W7750 and issue a

freeze stat alarm indicatin

g

the CVAHU is in dan

g

er of

freezin

g

its coil. The details of the W7750 freeze stat related

control operation are described in Appendix B—Se

q

uences of

Operation.

Modes of Operation

The possible modes of operation for the W7750 Controller are

listed in Table 5.

Table 5. Modes Of Operation For The Excel 10 W7750 Controller .

Mode Description Events causing a controller to switch to this mode

Effective Occupancy (User Address: StatusOcc)

OCCUPIED Controller is in Occupied mode An

y

of the followin

g

: Network input

(

DestSchedOcc

)

containin

g

a

time-of-da

y

schedule fla

g

from either the Excel 10 Zone Mana

g

er or an

LONWORKS Bus Controller; Time Clock DI, Occupanc

y

Sensor DI; or

from Network input

(

DestManMode

)

for manual override to OCC mode.

DestManMode has the hi

g

hest priorit

y

, followed b

y

the Time Clock DI,

and then DestSchedOcc.

STANDBY Controller is in Standb

y

mode Either:

(

A

)

Network input

(

DestSchedOcc

)

containin

g

a time-of-da

y

schedule fla

g

from the Excel 10 Zone Mana

g

er or other LONWORKS

Bus node is STANDBY, or

(

B

)

Network input

(

DestSchedOcc

)

is

OCCUPIED and the Occupanc

y

Sensor DI is UNOCCUPIED.

UNOCCUPIED Controller is in Unoccupied mode Network input

(

DestSchedOcc

)

containin

g

a time-of-da

y

schedule fla

g

from the Excel 10 Zone Mana

g

er or LONWORKS Bus, or the network

input DestManOcc has a value of UNOCCUPIED.

BYPASS

OCCUPIED Controller is in Occupied mode throu

g

h

a B

y

pass command This mode is derived from the schedule occupanc

y

(

DestSchedOcc

)

havin

g

a state of UNOCCUPIED and a manual re

q

uest for occupanc

y

from one of three sources. Two of these are si

g

nals ori

g

inated external

to the unit, and received b

y

DestManOcc and DestB

y

pass. The third

source for an occupanc

y

re

q

uest is from an override button located on

a wall module. These three sources are arbitrated in a scheme

determined b

y

the confi

g

uration parameter

(

Network Wins or Last-in

Wins from OvrdPriorit

y)

.

Override Modes (User Address: StatusOvrd)

OCCUPIED Controller occupanc

y

mode was

overridden to Occupied mode Network input

(

DestManOcc

)

containin

g

a time-of-da

y

schedule

override si

g

nal of OCCUPIED from the Excel 10 Zone Mana

g

er or

other LONWORKS Bus device.

STANDBY Controller occupanc

y

mode was

overridden to Standb

y

mode Network input

(

DestManOcc

)

containin

g

a time-of-da

y

schedule

override si

g

nal of STANDBY from the Excel 10 Zone Mana

g

er or other

LONWORKS Bus device.

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

74-2958—128

NOTE: Durin

g

all modes all di

g

ital and analo

g

ph

y

sical

inputs are periodicall

y

read, the dia

g

nostic output

network variables can be polled, the input network

variables are received, and the output network

variables are sent periodicall

y

.

UNOCCUPIED Controller occupanc

y

mode was

overridden to Unoccupied mode Network input

(

DestManOcc

)

containin

g

a time-of-da

y

schedule

override si

g

nal of UNOCCUPIED from the Excel 10 Zone Mana

g

er or

other LONWORKS Bus device.

BYPASS Controller occupanc

y

mode was

overridden to B

y

pass the current

Unoccupied mode

DI

(

B

y

pass

)

was pressed, and the B

y

pass duration timer has not

y

et

expired, or the network input DestManOcc has a value of BYPASS.

NOT

ASSIGNED No B

y

pass action No Override input received.

Operational Modes (User Address: StatusMode)

START-UP

AND WAIT On power-up, provides a sta

gg

ered

start se

q

uence to evenl

y

appl

y

the load

to the electrical s

y

stem.

This mode occurs on controller power-up, and after downloadin

g

to the

controller from the confi

g

uration tool. Temperature control loops are

disabled.

COOLING The Excel 10 is controllin

g

the Coolin

g

mode. Space temperature has risen above the current coolin

g

setpoint, or the

network input

(

DestHvacMode

)

is COOL.

HEATING The Excel 10 is controllin

g

the Heatin

g

mode. Space temperature has fallen below the current heatin

g

setpoint, or the

network input

(

DestHvacMode

)

is HEAT.

EMERGENCY

HEAT Compressors are disabled and onl

y

Auxiliar

y

Heat sta

g

es are allowed to

operate.

The network input

(

DestManHvacMode

)

is EMERG_HEAT.

OFF MODE The heat/cool control is turned off

immediatel

y

. The node is not runnin

g

its

normal temperature control.

Network input

(

DestManMode

)

containin

g

AHU operational mode

information from C-Bus has value of MORNING WARM-UP.

DISABLED

MODE The heat/cool control and frost

protection are turned off immediatel

y

.

The node is not runnin

g

its normal

temperature control.

–

SMOKE

EMERGENCY The node has entered a smoke

emer

g

enc

y

. The fan and dampers are

then set to the conditions confi

g

ured b

y

SmkCtlMode. The control remains in

SMOKE_ EMERGENCY until power is

c

y

cled or the node receives

DestEmer

g

Cmd set to

EMERG_NORMAL.

Network input

(

DestEmer

g

Cmd

)

containin

g

smoke control si

g

nal from

another LONWORKS Bus device has value of SMOKE_EMERG.

FREEZE

PROTECT The temperature control is set to HEAT

with the setpoint set to the frost limit

setpoint 46.4°F

(

8°C

)

.

The Window di

g

ital input detects an open window.

MANUAL

POSITION The ph

y

sical outputs are bein

g

controlled manuall

y

. The temperature

control loop is turned off.

T

y

picall

y

this is done b

y

the user throu

g

h E-Vision or XBS b

y

settin

g

the point DestManMode to MANUAL mode.

FAN ONLY Control al

g

orithm is disabled, except

that the fan is turned on. The space temperature sensor has failed, or the network input

(

DestHvacMode

)

is FAN ONLY.

DISABLED Control al

g

orithm is shut off. Network input

(

DestManMode

)

containin

g

AHU operational mode

information from an operator or the network that has a value of

DISABLED.

Table 5. Modes Of Operation For The Excel 10 W7750 Controller (Continued).

Mode Description Events causing a controller to switch to this mode

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

29 74-2958—1

APPLICATION STEPS

Overview

The seven application steps shown in Table 6 are plannin

g

considerations for en

g

ineerin

g

an Excel 10 W7750 S

y

stem.

These steps are

g

uidelines intended to aid understandin

g

of

the product I/O options, bus arran

g

ement choices,

confi

g

uration options and the Excel 10 W7750 Controller role

in the overall EXCEL 5000 OPEN SYSTEM architecture.

Table 6. Application Steps.

Step 1. Plan the System

Plan the use of the W7750 Controllers accordin

g

to the

j

ob

re

q

uirements. Determine the location, functionalit

y

and sensor

or actuator usa

g

e. Verif

y

the sales estimate of the number of

W7750 Controllers, T7770 and T7560 Wall Modules re

q

uired

for each model t

y

pe. Also check the number and t

y

pe of

output actuators and other re

q

uired accessories.

When plannin

g

the s

y

stem la

y

out, consider potential

expansion possibilities to allow for future

g

rowth. Plannin

g

is

ver

y

important to be prepared for addin

g

HVAC s

y

stems and

controllers in future pro

j

ects.

T7560 Wall Modules can onl

y

be hard-wired, the

y

have no

LONWORKS Bus access. T7770 Wall Modules can be installed

as either hard-wired I/O-onl

y

devices or additional wirin

g

can

be run to them

(

for the LONWORKS Bus network

)

to allow a

CARE/E-Vision operator terminal to have access to the

LONWORKS Bus. The application en

g

ineer needs to determine

how man

y

wall modules, T7770s and T7560s are re

q

uired. All

T7770 Wall Modules, except the T7770A1006 and the

T7770A1014, can be connected via the LONWORKS Bus

j

ack.

Also the application en

g

ineer needs to know how man

y

T7770s without LONWORKS Bus network connections are

bein

g

installed on the

j

ob, and then clearl

y

document which

wall modules

(

if an

y)

have network access. This information is

re

q

uired durin

g

installation to ensure that the proper number

and t

y

pe of wires are pulled to the wall modules, and the

buildin

g

operators are informed about where the

y

can plu

g

in

to the LONWORKS Bus network with a portable operator

terminal

(

see Fi

g

. 18, 19 and 20

)

. Refer to Step 4. Prepare

Wirin

g

Dia

g

rams for details, about the about the wirin

g

differences between the two t

y

pes.

Fig. 18. Connecting the portable operator terminal

to the LONWORKS® Bus.

The FTT communication wirin

g

,

(

LONWORKS Bus

)

between

controllers is a free topolo

gy

scheme that supports T-tap, star,

loop, and mixed wirin

g

architecture. Refer to the LONWORKS

Bus Wirin

g

Guidelines form, 74-2865 for complete description

of network topolo

gy

rules. See Application Step 3. La

y

Out

Communications and Power Wirin

g

, for more information on

bus wirin

g

la

y

out, and see Fi

g

. 27 throu

g

h 35 in Application

Step 4. Prepare Wirin

g

Dia

g

rams, for wirin

g

details.

The application en

g

ineer must review the Direct Di

g

ital

Control

(

DDC

)

j

ob re

q

uirements. This includes the Se

q

uences

of Operation for the W7750 units, and for the s

y

stem as a

whole. Usuall

y

there are variables that must be passed

between the W7750 Controllers and other zone controller

(

s

)

,

or central plant controller

(

s

)

that are re

q

uired for optimum

s

y

stem-wide operation. T

y

pical examples are the TOD Occ/

Unocc si

g

nal, the outdoor air temperature, the demand limit

control si

g

nal, and the smoke control mode si

g

nal.

It is important to understand these interrelationships earl

y

in

the

j

ob en

g

ineerin

g

process to ensure implemention when

confi

g

urin

g

the controllers.

(

See Application Step 6. Confi

g

ure

Controllers, for information on the various Excel 10

parameters and on Excel 10 point mappin

g

.

)

Step 2. Determine Other Bus Devices

Required

A maximum of 62 nodes can communicate on a sin

g

le

LONWORKS Bus se

g

ment. Each W7750

(

CVAHU

)

Controller

constitutes one node. If more nodes are re

q

uired, a Q7751A,B

Router is necessar

y

. Usin

g

a router allows up to 125 nodes,

divided between two LONWORKS Bus se

g

ments. The router

accounts for two of these nodes

(

one node on each side of the

router

)

; a Q7750A Excel 10 Zone Mana

g

er takes one node

and two nodes are available for operator terminal nodes,

leavin

g

120 nodes available for Excel 10 Controllers. All 120

controllers are able to talk to each other throu

g

h the router. A

Q7750A Excel 10 Zone Mana

g

er is re

q

uired to connect the

LONWORKS Bus to the standard EXCEL 5000 OPEN

S

y

stem C-Bus. Each Excel 10 Zone Mana

g

er supports up to

120 Excel 10 Controllers. This limit is set in the Excel 10 Zone

Mana

g

er database as an absolute maximum.

Step No. Description

1 Plan The S

y

stem

2 Determine Other Bus Devices Re

q

uired

3La

y

Out Communications and Power Wirin

g

4 Prepare Wirin

g

Dia

g

rams

5Order E

q

uipment

6Confi

g

ure Controllers

7 Troubleshootin

g

M15120A

NOTEBOOK PC

LONWORKS BUS

PORT

EIA-232

SERIAL

PORT

Q7752A

SLTA

CABLE

PART

NO. 205979

SHIELDED

INTERFACE

CABLE

EXCEL 10

W7750

CVAHU

CONTROLLER

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

74-2958—130

Each LONWORKS Bus se

g

ment is set up with two unused

nodes to allow for a CARE/E-Vision operator terminal to be

connected to the LONWORKS Bus. Multiple CARE/E-Vision

terminals can be connected to the LONWORKS Bus at the

same time. Table 7 summarizes the LONWORKS Bus se

g

ment

confi

g

uration rules.

Table 7. LONWORKS® Bus Configuration Rules And Device Node Numbers.

Refer to the LONWORKS Bus Wirin

g

Guidelines form, 74-2865

for complete description of network topolo

gy

rules and the

maximum wire len

g

th limitations. If lon

g

er runs are re

q

uired, a

Q7740A 2-Wa

y

or Q7740B 4-Wa

y

Repeater can be added to

extend the len

g

th of the LONWORKS Bus. A Q7751A,B Router

can be added to partition the s

y

stem into two se

g

ments and

effectivel

y

double the len

g

th of the LONWORKS Bus. Onl

y

one

router is allowed with each Excel 10 Zone Mana

g

er, and each

network se

g

ment can have a maximum of one repeater.

In addition, all LONWORKS Bus se

g

ments re

q

uire the

installation of a 209541B Termination Module for a sin

g

l

y

terminated LONWORKS Bus or two 209541B Termination

Modules for a doubl

y

terminated LONWORKS Bus. For more

details on LONWORKS Bus termination, refer to the LONWORKS

Bus Wirin

g

Guidelines form, 74-2865, or see Application Step

3. La

y

Out Communications and Power Wirin

g

, and the

LONWORKS Bus Termination Module subsection in Application

Step 4.

Step 3. Lay Out Communications and Power

Wiring

LONWORKS® Bus Layout

The communications bus, LONWORKS Bus, is a 78-kilobits per

second

(

kbps

)

serial link that uses transformer isolation and

differential Manchester encodin

g

. Approved cable t

y

pes for

LONWORKS Bus communications wirin

g

is Level IV 22 AWG

(

0.34 mm2

)

plenum or non-plenum rated unshielded, twisted

pair, solid conductor wire. For nonplenum areas, use Level IV

22 AWG

(

0.325 mm2

)

, such as U.S. part AK3781

(

one pair

)

or

U.S. part AK3782

(

two pair

)

. In plenum areas, use plenum-

rated Level IV, 22 AWG

(

0.325 mm2

)

such as U.S. part

AK3791

(

one pair

)

or U.S. part AK3792

(

two pair

)

. See Tables

9 and 11 for part numbers. Contact Echelon Corp. Technical

Support for the recommended vendors of Echelon approved

cables. The FTT communications bus, LONWORKS Bus,

supports a polarit

y

insensitive, free topolo

gy

wirin

g

scheme

that supports T-tap, star, loop, and mixed bus wirin

g

.

LONWORKS Bus networks can be confi

g

ured in a variet

y

of

wa

y

s, so refer to the LONWORKS Bus Wirin

g

Guidelines form,

74-2865 for complete description of network topolo

gy

rules

and Table 7. Fi

g

. 19 and 20 depict two t

y

pical LONWORKS Bus

network topolo

g

ies; One has onl

y

one doubl

y

terminated

LONWORKS Bus se

g

ment that has 60 nodes or less, and one

showin

g

two sin

g

l

y

terminated LONWORKS Bus se

g

ments that

has 120 nodes or less

(

60 MAX per each se

g

ment

)

. The bus

confi

g

uration is set up usin

g

the Network Mana

g

er tool from

within CARE

(

see the CARE Excel 10 Zone Mana

g

er User’s

Guide, form 74-1392

)

.

NOTE: For wirin

g

details see the LONWORKS Bus

Termination Module subsection in Step 4. For wall

module wirin

g

, U.S. part AK3782

(

non-plenum

)

or

U.S. part AK3792

(

plenum

)

can be used. For a

LONWORKS Bus that is a doubl

y

terminated dais

y

-

chain, these cables contain two twisted pairs

(

one for

the run down to the wall module, and one for the run

back up to the controller

)

for ease of installation.

One LONWORKS Bus Segment Example Maximum Number of Nodes Equals 62

One Q7750A Excel 10 Zone Mana

g

er 1 node

Port for operator terminal access

(

CARE/E-Vision

)

1 node

Maximum number of Excel 10s 60 nodes

Total 62 nodes

Two LONWORKS Bus Segments Example Maximum Number of Nodes Equals 125

One Q7750A Excel 10 Zone Mana

g

er 1 node

One Q7751A,B Router 2 nodes

(

1 in each Bus Se

g

ment

)

Ports for operator terminal access

(

two CARE/E-Vision

terminals

)

2 nodes

(

1 in each Bus Se

g

ment

)

Maximum number of Excel 10s in se

g

ment number one 60 nodes

Maximum number of Excel 10s in se

g

ment number two 60 nodes

Total 125 nodes

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

31 74-2958—1

Fig. 19. Wiring layout for one doubly terminated daisy-chain LONWORKS® Bus segment.

M17496

EXCEL 10

VAV

EXCEL 10

VAV

EXCEL 10

CVAHU

EXCEL 10

CVAHU

EXCEL 10

CVAHU

EXCEL 10

CVAHU

EXCEL 10

VAV

EXCEL 10

VAV

EXCEL 10

VAV

EXCEL 10

Q7750A

ZONE

MANAGER

TO C-BUS

(SEE FIG. 1)

LONWORKS BUS

LONWORKS BUS

LONWORKS BUS

UP TO 60

TOTAL NODES

T7770

T7770

T7770

T7770

JACK FOR

OPERATOR

TERMINAL

209541B

TERMINATION MODULES

(AT ENDS OF

LONWORKS BUS

DAISY-CHAIN)

T7770s

WITH

NO

LONWORKS BUS

ACCESS

LONWORKS BUS

I/O CONNECTIONS

EXCEL 10

CVAHU

T7770 OR T7560A,B

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

74-2958—132

Fig. 20. Wiring layout for two singly terminated

LONWORKS® Bus segments.

NOTE: See the LONWORKS Bus Termination Module section

for wirin

g

details.

IMPORTANT

Notes on communications wiring:

•All field wiring must conform to local codes and ordi-

nances or as specified on installation wiring dia-

grams.

•Approved cable types for LONWORKS

Bus communi-

cations wiring is Level IV 22 AWG (0.34 mm

2

) ple-

num or non-plenum rated unshielded, twisted pair,

solid conductor wire. For nonplenum areas, use

Level IV 22 AWG (0.34 mm

2

), such as U.S. part

AK3781 (one pair) or U.S. part AK3782 (two pair). In

plenum areas, use plenum-rated Level IV, 22 AWG

(0.34 mm

2

) such as U.S. part AK3791 (one pair) or

U.S. part AK3792 (two pair). See Tables 9 and 11 for

part numbers. Contact Echelon Corp. Technical Sup-

port for the recommended vendors of Echelon

approved cables.

•Unswitched 24 Vac power wiring can be run in the

same conduit as the LONWORKS

Bus cable.

•Do not use different wire types or gauges on the

same LONWORKS

Bus segment. The step change in

line impedance characteristics causes unpredictable

reflections on the bus. When using different types is

unavoidable, use a Q7751A,B Router at the junction.

•In noisy (high EMI) environments, avoid wire runs

parallel to noisy power cables, or lines containing

lighting dimmer switches, and keep at least 3 in.

(76 mm) of separation between noisy lines and the

LONWORKS

Bus cable.

•Make sure that neither of the LONWORKS

Bus wires

is grounded.

Power Wiring

A power bud

g

et must be calculated for each Excel 10 W7750

Controller to determine the re

q

uired transformer size for

proper operation. A power bud

g

et is simpl

y

the summin

g

of

the maximum power draw ratin

g

s

(

in VA

)

of all the devices to

be controlled b

y

an Excel 10 W7750 Controller. This includes

the controller itself, the e

q

uipment actuators

(

ML6161, or

other motors

)

and various contactors and transducers, as

appropriate, for the Excel 10 confi

g

uration.

POWER BUDGET CALCULATION EXAMPLE

The followin

g

is an example power bud

g

et calculation for a

t

y

pical Excel 10 W7750B Controller.

Assume a W7750 unit with a fan, two sta

g

es of D/X coolin

g

,

modulatin

g

steam valve for heatin

g

, and modulatin

g

economizer dampers. The power re

q

uirements are:

DeviceVA Information Obtained from

Excel 10 W7750B,C 12.0 W7750 Specification Data

Controller

ML6161 2.2 TRADELINE

Damper Actuator Catalo

g

R8242A 21.0 TRADELINE

Contactor for fan Catalo

g

in-rush ratin

g

D/X Sta

g

es 0.0

NOTE: For this example, assume the coolin

g

sta

g

e outputs

are wired into a compressor control circuit and,

therefore, have no impact on the power bud

g

et.

)

M6410A Steam 0.7 TRADELINE

Heatin

g

Coil Valve Catalo

g

, 0.32A at 24 Vac

TOTAL: 35.9 VA

The Excel 10 S

y

stem example re

q

uires 35.9 VA of peak

power; therefore, a 40 VA AT72D Transformer is able to

provide ample power for this controller and its accessories.

Alternativel

y

, a 75 VA AT88A Transformer could be used to

power two Excel 10 S

y

stems of this t

y

pe, or a 100 VA AT92A

Transformer could be used to power two of these Excel 10

S

y

stems and meet NEC Class 2 restrictions

(

no

g

reater than

100 VA

)

. See Fi

g

. 22 and 23 for illustrations of power wirin

g

details. See Table 8 for VA ratin

g

s of various devices.

EXCEL 10

VAV EXCEL 10

VAV

EXCEL 10

VAV

EXCEL 10

Q7750A

ZONE

MANAGER TO C-BUS

(SEE FIG. 1)

LONWORKS BUS

SEGMENT NUMBER 2

LONWORKS BUS

SEGMENT NUMBER 1

LONWORKS BUS

SEGMENT NUMBER 2

T7770

LONWORKS

BUS

ACCESS

Q7751A

FTT

LONWORKS

BUS

ROUTER

209541B

TERMINATION

MODULE

209541B

TERMINATION

MODULE

M17497

EXCEL 10

CVAHU

EXCEL 10

CVAHU

EXCEL 10

CVAHU

EXCEL 10

CVAHU

EXCEL 10

CVAHU

T7560A,B

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

33 74-2958—1

Table 8. VA Ratings For Transformer Sizing.

For contactors and similar devices, the in-rush power ratin

g

s

should be used as the worst case values when performin

g

power bud

g

et calculations. Also, the application en

g

ineer

must consider the possible combinations of simultaneousl

y

ener

g

ized outputs and calculate the VA ratin

g

s accordin

g

l

y

.

The worst case, that uses the lar

g

est possible VA load, should

be determined when sizin

g

the transformer.

LINE LOSS

Excel 10 Controllers must receive a minimum suppl

y

volta

g

e

of 20 Vac. If lon

g

power or output wire runs are re

q

uired, a

volta

g

e drop due to Ohms Law

(

I x R

)

line loss must be

considered. This line loss can result in a si

g

nificant increase in

total power re

q

uired and thereb

y

affect transformer sizin

g

.

The followin

g

example is an I x R line-loss calculation for a

200 ft.

(

61m

)

run from the transformer to a W7750 Controller

drawin

g

37 VA usin

g

two 18 AWG

(

1.0 mm2

)

wires.

The formula is:

Loss = [len

g

th of round-trip wire run

(

ft.

)

] X [resistance in

wire

(

ohms per ft.

)

] X [current in wire

(

amperes

)

]

From specification data:

18 AWG twisted pair wire has 6.52 ohms per 1000 feet.

Loss = [

(

400 ft.

)

X

(

6.52/1000 ohms per ft.

)

] X

[

(

37 VA

)

/

(

24V

)

] = 4.02 volts

This means that four volts are

g

oin

g

to be lost between the

transformer and the controller; therefore, to assure the

controller receives at least 20 volts, the transformer must

output more than 24 volts. Because all transformer output

volta

g

e levels depend on the size of the connected load, a

lar

g

er transformer outputs a hi

g

her volta

g

e than a smaller one

for a

g

iven load. Fi

g

. 21 shows this volta

g

e load dependence.

In the precedin

g

I x R loss example, even thou

g

h the

controller load is onl

y

37 VA, a standard 40 VA transformer is

not sufficient due to the line loss. From Fi

g

. 21, a 40 VA

transformer is

j

ust under 100 percent loaded

(

for the 37 VA

controller

)

and, therefore, has a secondar

y

volta

g

e of 22.9

volts.

(

Use the lower ed

g

e of the shaded zone in Fi

g

. 21 that

represents the worst case conditions.

)

When the I x R loss of

four volts is subtracted, onl

y

18.9 volts reaches the controller,

which is not enou

g

h volta

g

e for proper operation.

In this situation, the en

g

ineer basicall

y

has three alternatives:

1. Use a lar

g

er transformer; for example, if an 80 VA

model is used, see Fi

g

. 21, an output of 24.4 volts

minus the four volt line loss supplies 20.4V to the

controller. Althou

g

h acceptable, the four-volt line-loss in

this example is hi

g

her than recommended. See the

followin

g

IMPORTANT

.

2. Use heavier

g

au

g

e wire for the power run. 14 AWG

(

2.0

mm2

)

wire has a resistance of 2.57 ohms per 1000 ft.

which, usin

g

the precedin

g

formula,

g

ives a line-loss of

onl

y

1.58 volts

(

compared with 4.02 volts

)

. This would

allow a 40 VA transformer to be used. 14 AWG

(

2.0

mm2

)

wire is the recommended wire size for 24 Vac

wirin

g

.

3. Locate the transformer closer to the controller, thereb

y

reducin

g

the len

g

th of the wire run, and the line loss.

The issue of line-loss is also important in the case of the

output wirin

g

connected to the Triac di

g

ital outputs. The

same formula and method are used. The rule to

remember is to keep all power and output wire runs as

short as practical. When necessar

y

, use heavier

g

au

g

e

wire, a bi

gg

er transformer, or install the transformer

closer to the controller.

IMPORTANT

No installation should be designed where the line

loss is greater than two volts to allow for nominal

operation if the primary voltage drops to 102 Vac

(120 Vac minus 15 percent).

To meet the National Electrical Manufacturers Association

(

NEMA

)

standards, a transformer must sta

y

within the NEMA

limits. The chart in Fi

g

. 21 shows the re

q

uired limits at various

loads.

With 100 percent load, the transformer secondar

y

must

suppl

y

between 23 and 25 volts to meet the NEMA standard.

When a purchased transformer meets the NEMA standard

DC20-1986, the transformer volta

g

e-re

g

ulatin

g

abilit

y

can be

considered reliable. Compliance with the NEMA standard is

voluntar

y

.

The followin

g

Hone

y

well transformers meet this NEMA

standard:

Transformer Type VA Rating

AT20A 20

AT40A 40

AT72D 40

AT87A 50

AK3310 Assembl

y

100

Device Description VA

W7750A Excel 10 W7750 Controller 6.0

W7750B,C Excel 10 W7750 Controllers 12.0

ML6161A/B Damper Actuator, 35 lb-in. 2.2

R8242A Contactor 21.0

M6410A Valve Actuator 0.7

MMC325 Pneumatic Transducer 5.0

ML684 Versadrive Valve Actuator 12.0

ML6464 Damper Actuator, 66 lb-in. 3.0

ML6474 Damper Actuator, 132 lb-in. 3.0

ML6185 Damper Actuator SR 50 lb-in. 12.0

ML7984B PWM Valve Actuator 6.0

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

74-2958—134

Fig. 21. NEMA class 2 transformer voltage output limits.

Attach earth

g

round to W7750 Controller terminal 1. See Fi

g

.

22, 23 and 24, 27 throu

g

h 35.

Fig. 22. Power wiring details for one Excel 10 per

transformer.

See Fi

g

. 23. for wirin

g

more than one Excel 10 per

transformer.

Fig. 23. Power wiring details for two or more Excel 10s per transformer.

IMPORTANT

If the W7750 Controller is used on Heating and

Cooling Equipment (UL 1995 U.S. only

)

devices

and the transformer primary power is more than 150

volts, connect the transformer secondary to earth

ground, see Fig. 24.

27

26

25

24

23

22

21

20

19

18

17

16

15

14

0 50 100 150

% OF LOAD

SECONDARY VOLTAGE

200

M993

M10089B

CONNECT POWER TO

TERMINALS 24 AND 25

TRIAC LINES

TO ACTUATORS

AND CONTACTORS

TRANSFORMER

W7750B,C

EARTH

GROUND

2022

24

25

1

OUTPUT

DEVICE

POWER

M10090A

24 VAC

120/240 VAC

TRANSFORMER

W7750B,C

EARTH

GROUND

24

25

1

W7750B,C

EARTH

GROUND

24

25

1

W7750B,C

EARTH

GROUND

24

25

1

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

35 74-2958—1

Fig. 24. Transformer power wiring details for one Excel 10

used in UL 1995 equipment (U.S. only).

IMPORTANT

Notes on power wiring:

•All field wiring must conform to local codes and ordi-

nances or as specified on installation wiring dia-

grams.

•To maintain NEC Class 2 and UL ratings, the instal-

lation must use transformers of 100 VA or less

capacity.

•For multiple controllers operating from a single trans-

former, the same side of the transformer secondary

must be connected to the same input terminal in

each controller (21 on the W7750A and 24 on the

W7750B,C) and the ground terminals must be con-

nected to a verified earth ground for each controller

in the group. See Fig. 23. (Controller configurations

are not necessarily limited to three devices per trans-

former.)

•For the W7750B,C Controller (which has Triac out-

puts), all output devices must be powered from the

same transformer as the one powering the Excel 10

W7750 Controller.

•Use the heaviest gauge wire available, up to 14

AWG (2.0 mm

2

) with a minimum of 18 AWG (1.0

mm

2

) for all power and earth ground connections.

•To minimize EMI noise, do not run Triac output wires

in the same conduit as the input wires or the LON-

WORKS

Bus communications wiring.

•Unswitched 24 Vac power wiring can be run in the

same conduit as the LONWORKS

Bus cable.

•Make earth ground connections with the shortest

possible wire run using 14 AWG (2.0 mm

2

) wire. A

good earth ground is essential for W7750 operation.

Ideally, connect the earth ground to the ground bus

at a motor control center or circuit breaker panel.

However, if the nearest ideal earth ground is inac-

cessible, consider an alternate source for earth

ground. Metal water pipe is generally a good ground,

but do not use sprinkler pipe if prohibited by local

codes. Attention must be given when duct work, con-

duit, or rebar are to be considered as ground

sources. It is the responsibility of the installer to

assure that these structures are tied back to a known

earth ground.

Step 4. Prepare Wiring Diagrams

General Considerations

The purpose of this step is to assist the application en

g

ineer in

developin

g

j

ob drawin

g

s to meet

j

ob specifications. Wirin

g

details are included for the W7750A,B,C Controllers and the

T7770 and T7560A,B Wall Modules. The drawin

g

s detail I/O,

power, and LONWORKS Bus communication wirin

g

connections.

NOTE: For field wirin

g

, when two or more wires, other than

14 AWG

(

2.0 mm2

)

are to be attached to the same

connector block terminal, be sure to twist them

to

g

ether. Deviation from this rule can result in

improper electrical contact. See Fi

g

. 25.

The connector block terminals on the W7750 Controllers and

on the T7770 Wall Modules accept 14 throu

g

h 22 AWG

(

2.0 to

0.34 mm2

)

wire. The connector block terminals on the

T7560A,B Wall Modules accept 18 throu

g

h 22 AWG

(

1.0 to

0.34 mm2

)

wire. Table 9 lists wirin

g

t

y

pes, sizes, and len

g

th

restrictions for Excel 10 products.

M10088A

24 VAC

LINE VOLTAGE

GREATER

THAN 150 VAC

TRANSFORMER

W7750

EARTH

GROUND

EARTH

GROUND

IF THE W7750 CONTROLLER IS USED IN UL 1995 EQUIPMENT AND THE

PRIMARY POWER IS MORE THAN 150 VOLTS, GROUND 24 VAC COM

SIDE OF TRANSFORMER SECONDARY.

1

1

1

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

74-2958—136

Table 9. Field Wiring Reference Table (Honeywell listed as AK#### or equivalent).

W7750 Controllers

Fi

g

. 27 throu

g

h 35 illustrate W7750A,B,C Controller wirin

g

for

various confi

g

urations. Connections to the wall module

terminals

(

2 throu

g

h 6

)

and the communications terminals

(

14

and 15

)

are made at terminal blocks. Connection for access to

the LONWORKS Bus is provided b

y

plu

gg

in

g

the connector into

the communications

j

ack.

Fig. 25. Attaching two or more wires at terminal blocks.

The W7750B provides a

j

umper to select Hi

g

h-Side or Low-

Side switchin

g

of the di

g

ital outputs. Fi

g

. 26 shows the

W7750B Hi

g

h-Side/Low-Side selectable switchin

g

.

(

See

wirin

g

dia

g

rams, Fi

g

s. 30 throu

g

h 34.

)

Fig. 26. W7750B High-Side/Low-Side selectable switching

and jumper location.

NOTE: If an Excel 10 W7750A,B,C Controller or Zone

Mana

g

er is not connected to a

g

ood earth

g

round,

the controller internal transient protection circuitr

y

is

compromised and the function of protectin

g

the

controller from noise and power line spikes cannot

be fulfilled. This can result in a dama

g

ed circuit

board and re

q

uire replacin

g

the controller.

See Table 10 for a description of the W7750A terminals.

Wire

Function

Recommended

Minimum Wire

Size AWG (mm2) Construction

Specification

or

Requirement Vendor Wire Type Maximum Length ft.

(m)

LONWORKS

Bus

(Plenum)

22 AWG

(

0.34 mm2

)

Twisted pair solid

conductor, nonshielded

or Echelon approved

cable.

Level IV

140°F

(

60°C

)

ratin

g

Hone

y

well

AK3791

(

one twisted pair

)

AK3792

(

two twisted pairs

)

Refer to LONWORKS Bus

Wirin

g

Guidelines for

maximum len

g

th

LONWORKS

Bus (Non-

Plenum)

22 AWG

(

0.34 mm2

)

Twisted pair solid

conductor, nonshielded

or Echelon approved

cable.

Level IV

140°F

(

60°C

)

ratin

g

Hone

y

well

AK3781

(

one twisted pair

)

AK3782

(

two twisted pairs

)

Refer to LONWORKS Bus

Wirin

g

Guidelines for

maximum len

g

th

Input

Wiring

Sensors

Contacts

18 to 22 AWG

(

1.0 to 0.34 mm2

)

Multiconductor

(

usuall

y

five-wire cable bundle

)

.

For runs >200 ft.

(

61m

)

in nois

y

EMI areas, use

shielded cable.

140°F

(

60°C

)

ratin

g

Standard thermostat wire 1000 ft.

(

305m

)

for 18

AWG 200 ft.

(

61m

)

for 22

AWG

Output

Wiring

Actuators

Relays

14 AWG

(

2.0 mm2

)

18 AWG

(

1.0 mm2

)

acceptable for

short runs

)

An

y

pair nonshielded

(

use heavier wire for

lon

g

er runs

)

.

NEC Class 2

140°F

(

60°C

)

ratin

g

Hone

y

well

AK3702

(

18 AWG

)

AK3712

(

16 AWG

)

AK3754

(

14 AWG

)

Limited b

y

line-loss

effects on power

consumption.

(

See Line

Loss subsection.

)

Power

Wiring 14 AWG

(

2.0 mm2

)

An

y

pair nonshielded

(

use heavier wire for

lon

g

er runs

)

.

NEC Class 2

140°F

(

60°C

)

ratin

g

Hone

y

well

AK3754

(

14 AWG

)

twisted

pair AK3909

(

14 AWG

)

sin

g

le conductor

Limited b

y

line-loss

effects on power

consumption.

(

See Line

Loss subsection.

)

1/2

(13)

STRIP 1/2 IN. (13 MM)

FROM WIRES TO

BE ATTACHED AT

ONE TERMINAL.

1.

2. TWIST WIRES

TOGETHER WITH

PLIERS (A MINIMUM

OF THREE TURNS).

3. CUT TWISTED END OF WIRES TO 3/16 IN. (5 MM)

BEFORE INSERTING INTO TERMINAL AND

TIGHTENING SCREW. THEN PULL ON EACH

WIRE IN ALL TERMINALS TO CHECK FOR

GOOD MECHANICAL CONNECTION. M17207

U3

Q38

J2

JUMPER

TERMINAL 24

J2 IS LOCATED NEAR TERMINAL 24 (COVER REMOVED).

W7750B IS FACTORY-DELIVERED WITH JUMPER ON HIGH-SIDE

(PINS CLOSEST TO TERMINAL BLOCK). LOW-SIDE PINS ARE TWO

PINS CLOSEST TO Q38.

1

1

2

2

M16418A

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

37 74-2958—1

Table 10. W7750A Version I/O Description.

IMPORTANT

If the W7750A controller is configured by E-Vision,

the outputs may be assigned in different order than

the factory defaults. Use the Custom Wiring function

of E-Vision to re-assign the outputs to the desired

terminals.

The W7750B,C Versions are preconfi

g

ured with the same

factor

y

default setup as the W7750A Model; however, some

terminals for wirin

g

connections differ on the W7750B,C

Models. See Fi

g

. 30 for the terminal names on the W7750B

Model and Fi

g

. 35 for the terminal names on the W7750C

Model. The factor

y

default confi

g

uration of the di

g

ital output

points on the W7750B,C Models follow

(

terminal names are

from the W7750A

)

:

FACTORY DEFAULT DIGITAL OUTPUTS:

FREE 1

(

OUT 1

)

DO1—NETWORK DO

(

OUT 2

)

DO2—SUPPLY FAN START/STOP

(

OUT 3

)

DO3—COOL_STAGE_2

(

OUT 4

)

DO4—COOL_STAGE_1

(

OUT 5

)

DO5—HEAT_STAGE_2

(

OUT 6

)

DO6—HEAT_STAGE_1

DO7—UNUSED

DO8—UNUSED

The Wall Module terminals are identical for the W7750A,B,C

Models.

The W7750B,C Models offers two volta

g

e/current sensor

input terminals. When current-t

y

pe sensors

(

4 to 20 mA

)

are

confi

g

ured, the W7750B,C automaticall

y

switches a 249 ohm

resistor into the sensin

g

circuit; so no external resistor is

re

q

uired. The W7750A Model does not support volta

g

e or

current inputs.

NOTE: If usin

g

factor

y

defaults, DI-2 input is confi

g

ured for

ScheduleMaster

(

nvoIO.SchedMaster

)

. For a

stand-alone unit, either connect an external time

clock to terminals 9 and 10 or put a

j

umper on

terminals 9 and 10

(

usin

g

a

j

umper puts the

controller in continuous occupied mode

)

.

Terminal Terminal Number Description

DO6–

(

W1

)

31 Heat 1

(

or Reversin

g

Valve for a Heat Pump

)

DO5–

(

W2

)

30 Heat 2

(

or Aux. Heat for a Heat Pump

)

DO4–

(

Y1

)

29 Cool 1

(

or Compressor 1 for a Heat Pump

)

DO3–

(

Y2

)

28 Cool 2

(

or Compressor 2 for a Heat Pump

)

DO2–

(

G

)

27 Fan

DO1–NET 26 Network Di

g

ital Output

DO1–NET 25 Network Di

g

ital Output

(

connect to terminal number 22 +24Vac

)

Rc 24 Control power for rela

y

contacts DO2

(

G

)

, DO3

(

Y1

)

and DO4

(

Y2

)

Rh 23 Control power for rela

y

contacts DO5

(

W1

)

and DO6

(

W2

)

+24Vac

(

H

)

22 Power for the controller

COM

(

N

)

21 Return for power to controller

E-Bus 14 and 15 Echelon communications

(

LONWORKS Bus

)

screw terminals

DI - 2 12 Di

g

ital Input 2

DGND 11 Di

g

ital Ground

DGND 10 Di

g

ital Ground

DI - 1 9 Di

g

ital Input 1

AGND 8 Analo

g

g

round

AI - 1 OHM 7 Analo

g

Input 1

(

used for Dischar

g

e Air Temperature Sensor

)

SET PT 6 Space temperature setpoint potentiometer

GROUND 5 Wall Module

SENSOR 4 Space temperature sensor

BYPASS 3 Space override button

LED 2 Space LED for indication of manual occupanc

y

status

EARTH GND 1 Earth Ground

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

74-2958—138

Fig. 27. Typical W7750A Controller AHU application

wiring diagram. (For more information on note 2,

refer to Fig. 25.) Fig. 28. Typical W7750A Controller with separate

transformer application wiring diagram.

(For more information on note 2, refer to Fig. 25.)

12345678

1

3

2

2

1

2

3

EARTH GROUND WIRE LENGTH SHOULD BE HELD TO A MINIMUM.

USE THE HEAVIEST GAUGE WIRE AVAILABLE, UP TO 14 AWG (2.O MM2)

WITH A MINIMUM OF 18 AWG (1.O MM2), FOR EARTH GROUND WIRE.

TO ASSURE PROPER ELECTRICAL CONTACT, WIRES MUST BE TWISTED

TOGETHER BEFORE INSERTION INTO THE TERMINAL BLOCK.

LOAD POWER WIRE CAN BE CONNECTED TO TERMINAL 22.

LONWORKS-BUS

EARTH

GROUND

JACK FOR

LONWORKS-BUS

NETWORK

ACCESS

7654321

T7770C

WALL

MODULE

SET PT

GND

SENSOR

BYPASS

LED

E-BUS

E-BUS

9 101112 14 J315

31 30 29 28 27 26 25 24 23 22 21 20

WALL MODULE

SET PT

AI

GROUND

AI

GROUND

DI

GROUND

DI

GROUND

SENSOR

BYPASS

LED

LON

JACK

LONWORKS

BUS

NOT USED

9 8

19 18 17 16

AI-1 OHM

DI- 1

DI- 2

13

TIME CLOCK

M10085C

DISCHARGE

AIR TEMP

24 VAC

24 VAC COM

Rc

Rh

W1

W2

Y1

Y2

G

NOT USED

24 VAC

+

-

LOAD AND

CONTROLLER

POWER

FAN

COMP2COMP 1

HEAT 2HEAT 1

W7750A

CONSTANT

VOLUME AHU

CONTROLLER

NETWORK

DO

12345678

W7750A

CONSTANT

VOLUME AHU

CONTROLLER

1

2

2

1

2

EARTH GROUND WIRE LENGTH SHOULD BE HELD TO A MINIMUM.

USE THE HEAVIEST GAUGE WIRE AVAILABLE, UP TO 14 AWG (2.O MM

2

)

WITH A MINIMUM OF 18 AWG (1.O MM

2

), FOR EARTH GROUND WIRE.

TO ASSURE PROPER ELECTRICAL CONTACT, WIRES MUST BE TWISTED

TOGETHER BEFORE INSERTION INTO THE TERMINAL BLOCK.

L

ON

W

ORKS

-BUS

EARTH

GROUND

JACK FOR

L

ON

W

ORKS

-BUS

NETWORK

ACCESS

7 69 8 54321

T7770C

WALL

MODULE

SET PT

GND

SENSOR

BYPASS

LED

E-BUS

E-BUS

9101112 14 J315

31 30 29 28 27 26 25 24 23 22 21 20

WALL MODULE

SET PT

SENSOR

BYPASS

LED

NOT USED

19 18 17 16

AI-1 OHM

DI- 1

DI- 2

13

TIME CLOCK

M10084C

DISCHARGE

AIR TEMP

24 VAC

24 VAC COM

Rc

Rh

W1

W2

Y1

Y2

G

NOT USED

24 VAC

24 VAC LINE AC

+

-

CONTROLLER POWER

LOAD POWER

FAN

COMP2COMP 1

HEAT 2HEAT 1

H

C

NETWORK

DO

AI

GROUND

AI

GROUND

DI

GROUND

DI

GROUND

L

ON

JACK

L

ON

W

ORKS

BUS

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

39 74-2958—1

Fig. 29. W7750A Controller floating economizer damper

wiring diagram. (For more information on note 2, refer to

Fig. 25.)

NOTE: Di

g

ital outputs are confi

g

urable. The terminal

locations for each function are user-selectable. The

Network DO is confi

g

ured to be economizer float

close in this fi

g

ure and W2 is confi

g

ured to be

economizer float open. Ph

y

sical output terminal

features are done in E-Vision b

y

the custom wirin

g

function.

12345678

W7750A

CONSTANT

VOLUME AHU

CONTROLLER

1

2

2

1

2

3

EARTH GROUND WIRE LENGTH SHOULD BE HELD TO A MINIMUM.

USE THE HEAVIEST GAUGE WIRE AVAILABLE, UP TO 14 AWG (2.O MM2)

WITH A MINIMUM OF 18 AWG (1.O MM2), FOR EARTH GROUND WIRE.

TO ASSURE PROPER ELECTRICAL CONTACT, WIRES MUST BE TWISTED

TOGETHER BEFORE INSERTION INTO THE TERMINAL BLOCK.

LOAD POWER WIRE CAN BE CONNECTED TO TERMINAL 22.

LONWORKS-BUS

EARTH

GROUND

JACK FOR

LONWORKS-BUS

NETWORK

ACCESS

7 69 8 54321

T7770C

WALL

MODULE

SET PT

GND

SENSOR

BYPASS

LED

E-BUS

E-BUS

9 101112 14 J315

31 30 29 28 27 26 25 24 23 22 21 20

WALL MODULE

SET PT

SENSOR

BYPASS

LED

NOT USED

19 18 17 16

AI-1 OHM

DI- 1

DI- 2

13

TIME CLOCK

M10083C

DISCHARGE

AIR TEMP

24 VAC

24 VAC COM

Rc

Rh

NETWORK

DO

W1

W2

Y1

Y2

G

24 VAC

+

-

3

LOAD AND

CONTROLLER

POWER

NOT USED

ML6161 FLOATING

ACTUATOR

CW COM CCW

HEAT 1

AI

GROUND

AI

GROUND

DI

GROUND

DI

GROUND

LON

JACK

LONWORKS

BUS

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

74-2958—140

Fig. 30. Typical W7750B Controller with staged heating

and cooling wiring diagram. (For more information on

note 2, refer to Fig. 25.) Fig. 31. W7750B Controller with floating heating, cooling

and economizer wiring diagram. (For more information on

note 2, refer to Fig. 25.)

12345678

24 VAC

W7750B CONSTANT

VOLUME AHU

CONTROLLER

1

2

2

1

2

3

4

3

4

EARTH GROUND WIRE LENGTH SHOULD BE HELD TO A MINIMUM.

USE THE HEAVIEST GAUGE WIRE AVAILABLE, UP TO 14 AWG (2.O MM2)

WITH A MINIMUM OF 18 AWG (1.O MM2), FOR EARTH GROUND WIRE.

TO ASSURE PROPER ELECTRICAL CONTACT, WIRES MUST BE TWISTED

TOGETHER BEFORE INSERTION INTO THE TERMINAL BLOCK.

WIRING DIAGRAM SHOWS JUMPER (FOR J2) IN FACTORY DEFAULT

HIGH-SIDE POSITION.

ISOLATING RELAYS MUST BE USED WHEN CONNECTING TO STAGED

HEAT/COOL EQUIPMENT.

LONWORKS-BUS

EARTH

GROUND

JACK FOR

LONWORKS-BUS

NETWORK

ACCESS

7 69 8 54321

T7770C

WALL

MODULE

SET PT

GND

SENSOR

BYPASS

LED

E-BUS

E-BUS

9 101112 14 J315

31 30 29 28 27 26 25 24 23 22 21 20

24 VAC COM

WALL MODULE

SET PT

SENSOR

BYPASS

LED

20 VDC OUT

19 18 17 16

AI-1 OHM

AI-2 OHM

AI-4 V/mA

OUT 7

OUT 6

OUT 5

OUT 4

OUT 8

OUT 1

OUT 3

OUT 2

AI-3 V/mA

13

DI-2

DI-4

DI-1

DI-3

DI

GROUND

M10082D

DI

GROUND

TRIAC EQUIVALENT CIRCUIT

24 VAC

+

-

HEAT

STAGE 1

HEAT

STAGE 2

COOL

STAGE 1FAN COOL

STAGE 2

COOL

STAGE 3

COOL

STAGE 4

AI

GROUND

AI

GROUND

AI

GROUND

LON

JACK

LONWORKS

BUS

12345678

24 VAC

W7750B CONSTANT

VOLUME AHU

CONTROLLER

1

2

2

1

2

3

EARTH GROUND WIRE LENGTH SHOULD BE HELD TO A MINIMUM.

USE THE HEAVIEST GAUGE WIRE AVAILABLE, UP TO 14 AWG (2.O MM2)

WITH A MINIMUM OF 18 AWG (1.O MM2), FOR EARTH GROUND WIRE.

TO ASSURE PROPER ELECTRICAL CONTACT, WIRES MUST BE TWISTED

TOGETHER BEFORE INSERTION INTO THE TERMINAL BLOCK.

WIRING DIAGRAM SHOWS JUMPER (FOR J2) IN FACTORY DEFAULT

HIGH-SIDE POSITION.

LONWORKS-BUS

EARTH

GROUND

JACK FOR

LONWORKS-BUS

NETWORK

ACCESS

7 69 8 54321

T7770C

WALL

MODULE

SET PT

GND

SENSOR

BYPASS

LED

E-BUS

E-BUS

9 101112 14 J315

31 30 29 28 27 26 25 24 23 22 21 20

24 VAC COM

WALL MODULE

SET PT

SENSOR

BYPASS

LED

20 VDC OUT

19 18 17 16

AI-1 OHM

AI-2 OHM

AI-4 V/mA

OUT 7

OUT 6

OUT 5

OUT 4

OUT 8

OUT 1

OUT 3

OUT 2

AI-3 V/mA

13

DI-2

DI-4

DI-1

DI-3

M10081C

TRIAC EQUIVALENT CIRCUIT

DISCHARGE

AIR TEMP

24 VAC

+

-

SERIES 60

VALVE ACTUATOR

SERIES 60

ACTUATOR

CW COM CCW

COM

STEM

UP

STEM

DOWN

SERIES 60

VALVE ACTUATOR

COM

STEM

UP

STEM

DOWN

ECONOMIZER

DAMPER

TWO - OR THREE-WAY

HOT WATER/STEAM VALVE

TWO - OR THREE-WAY

CHILLER WATER VALVE

3

DI

GROUND

DI

GROUND

AI

GROUND

AI

GROUND

AI

GROUND

LON

JACK

LONWORKS

BUS

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

41 74-2958—1

Fig. 32. W7750B,C Controller PWM damper actuator

wiring diagram. (For more information on note 2, refer to

Fig. 25.)

Fig. 33. W7750B,C wiring diagram with 4 to 20 mA

enthalpy sensors and digital inputs. (For more

information on note 2, refer to Fig. 25.)

12345678

24 VAC

W7750B CONSTANT

VOLUME AHU

CONTROLLER

1

2

2

1

2

3

4

EARTH GROUND WIRE LENGTH SHOULD BE HELD TO A MINIMUM.

USE THE HEAVIEST GAUGE WIRE AVAILABLE, UP TO 14 AWG (2.O MM2)

WITH A MINIMUM OF 18 AWG (1.O MM2), FOR EARTH GROUND WIRE.

TO ASSURE PROPER ELECTRICAL CONTACT, WIRES MUST BE TWISTED

TOGETHER BEFORE INSERTION INTO THE TERMINAL BLOCK.

WIRING DIAGRAM SHOWS JUMPER (FOR J2) IN FACTORY DEFAULT

HIGH-SIDE POSITION.

FOR WIRING DETAILS FOR PWM DEVICES, REFER TO DOCUMENTATION

INCLUDED WITH PWM DEVICES.

EARTH

GROUND

7 69 8 54321

T7770C

WALL

MODULE

SET PT

GND

SENSOR

BYPASS

LED

E-BUS

E-BUS

9 101112 14 J315

31 30 29 28 27 26 25 24 23 22 21 20

24 VAC COM

WALL MODULE

SET PT

GROUND

SENSOR

BYPASS

LED

20 VDC OUT

19 18 17 16

AI-1 OHM

GROUND

GROUND

AI-2 OHM

AI-4 V/mA

OUT 7

OUT 6

OUT 5

OUT 4

OUT 8

OUT 1

OUT 3

OUT 2

AI-3 V/mA

13

DI-2

DI-4

DI-1

DI-3

DI

GROUND

M10080C

DI

GROUND

TRIAC EQUIVALENT CIRCUIT

DISCHARGE

AIR TEMP

24 VAC

+

-

4

PWM ACTUATOR

24V COM 24V

ECONOMIZER

DAMPER

POWER SIGNAL

SIG

LONWORKS

BUS

LON

JACK

LONWORKS-BUS

JACK FOR

LONWORKS-BUS

NETWORK

ACCESS

3

12345678

24 VAC

24 VAC

W7750B CONSTANT

VOLUME AHU

CONTROLLER

1

2

2

1

2

3

EARTH GROUND WIRE LENGTH SHOULD BE HELD TO A MINIMUM.

USE THE HEAVIEST GAUGE WIRE AVAILABLE, UP TO 14 AWG (2.O MM2)

WITH A MINIMUM OF 18 AWG (1.O MM2), FOR EARTH GROUND WIRE.

TO ASSURE PROPER ELECTRICAL CONTACT, WIRES MUST BE TWISTED

TOGETHER BEFORE INSERTION INTO THE TERMINAL BLOCK.

WIRING DIAGRAM SHOWS JUMPER (FOR J2) IN FACTORY DEFAULT

HIGH-SIDE POSITION.

LONWORKS-BUS

EARTH

GROUND

JACK FOR

LONWORKS-BUS

NETWORK

ACCESS

7 69 8 54321

T7770C

WALL

MODULE

SET PT

GND

SENSOR

BYPASS

LED

E-BUS

E-BUS

9 101112 14 J315

31 30 29 28 27 26 25 24 23 22 21 20

24 VAC COM

WALL MODULE

SET PT

SENSOR

BYPASS

LED

20 VDC OUT

19 18 17 16

AI-1 OHM

AI-2 OHM

AI-4 V/mA

+

-

OUT 7

OUT 6

OUT 5

OUT 4

OUT 8

OUT 1

OUT 3

OUT 2

AI-3 V/mA

13

DI-2

DI-4

DI-1

DI-3

OCCUPANCY SENSOR

(CONTACTS CLOSED

EQUALS OCCUPIED)

WINDOWS CONTACTS

(CONTACTS CLOSED

EQUALS WINDOW

CLOSED)

M10079C

TRIAC EQUIVALENT CIRCUIT

DISCHARGE

AIR TEMP OUTDOOR

ENTHALPY RETURN

ENTHALPY

3

DI

GROUND

DI

GROUND

AI

GROUND

AI

GROUND

AI

GROUND

LON

JACK

LONWORKS

BUS

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

74-2958—142

Fig. 34. W7750B,C wiring diagram with C7600C 4 to 20 mA

solid state humidity sensor. (For more information on

note 2, refer to Fig. 25.)

Fig. 35. W7750C Controller with 4-to-20 mA heating,

cooling and economizer wiring diagram. AOs must use

terminals 16, 17 or 18. The AOs can be set to be reverse

acting. (For more information on note 2, refer to Fig. 25.)

See Fi

g

. 36 or 37 to wire a pneumatic transducer to a

W7750B or W7750C.

12345678

24 VAC

24 VAC

W7750B CONSTANT

VOLUME AHU

CONTROLLER

1

2

2

1

2

3

EARTH GROUND WIRE LENGTH SHOULD BE HELD TO A MINIMUM.

USE THE HEAVIEST GAUGE WIRE AVAILABLE, UP TO 14 AWG (2.O MM2)

WITH A MINIMUM OF 18 AWG (1.O MM2), FOR EARTH GROUND WIRE.

TO ASSURE PROPER ELECTRICAL CONTACT, WIRES MUST BE TWISTED

TOGETHER BEFORE INSERTION INTO THE TERMINAL BLOCK.

WIRING DIAGRAM SHOWS JUMPER (FOR J2) IN FACTORY DEFAULT

HIGH-SIDE POSITION.

EARTH

GROUND

7 69 8 54321

T7770C

WALL

MODULE

SET PT

GND

SENSOR

BYPASS

LED

E-BUS

E-BUS

9 101112 14 J315

31 30 29 28 27 26 25 24 23 22 21 20

24 VAC COM

WALL MODULE

SET PT

GROUND

SENSOR

BYPASS

LED

20 VDC OUT

19 18 17 16

AI-1 OHM

GROUND

GROUND

AI-2 OHM

AI-4 V/mA

+

-

OUT 7

OUT 6

OUT 5

OUT 4

OUT 8

OUT 1

OUT 3

OUT 2

AI-3 V/mA

13

DI-2

DI-4

DI-1

DI-3

DI

GROUND

OCCUPANCY SENSOR

(CONTACTS CLOSED

EQUALS OCCUPIED)

WIND

O

W

S

CO

NTA

C

T

S

(CONTACTS CLOSED

EQUALS WINDOW

CLOSED)

M11619B

DI

GROUND

TRIAC EQUIVALENT CIRCUIT

+

–

C7600C

HUMIDITY

(4 TO 20 MA)

LONWORKS

BUS

LON

JACK

LONWORKS-BUS

JACK FOR

LONWORKS-BUS

NETWORK

ACCESS

3

12345678

24 VAC

W7750C CONSTANT

VOLUME AHU

CONTROLLER

1

2

2

3

1

2

EARTH GROUND WIRE LENGTH SHOULD BE HELD TO A MINIMUM.

USE THE HEAVIEST GAUGE WIRE AVAILABLE, UP TO 14 AWG (2.O MM2)

WITH A MINIMUM OF 18 AWG (1.O MM2), FOR EARTH GROUND WIRE.

TO ASSURE PROPER ELECTRICAL CONTACT, WIRES MUST BE TWISTED

TOGETHER BEFORE INSERTION INTO THE TERMINAL BLOCK.

IF AN ANALOG OUTPUT DEVICE HAS A SIGNAL COM (-) TERMINAL,

CONNECT IT TO THE 24 VAC COM TERMINAL NUMBER 24.

LONWORKS-BUS

EARTH

GROUND

JACK FOR

LONWORKS-BUS

NETWORK

ACCESS

7 69 8 54321

T7770C

WALL

MODULE

SET PT

GND

SENSOR

BYPASS

LED

E-BUS

E-BUS

9 101112 14 J315

31 30 29 28 27 26 25 24 23 22 21 20

24 VAC COM

WALL MODULE

SET PT

SENSOR

BYPASS

LED

20 VDC OUT

19 18 17 16

AI-1 OHM

AI-2 OHM

AI-4 V/mA

AO 2

AO 1

OUT 5

OUT 4

AO 3

OUT 1

OUT 3

OUT 2

AI-3 V/mA

13

DI-2

DI-4

DI-1

DI-3

M16417B

TRIAC EQUIVALENT

CIRCUIT

DISCHARGE

AIR TEMP

24 Vac

+

++

-

-

3

SERIES 70

VALVE

ACTUATOR ML7161

4-20

mA

2-10

V

24

Vac

COM 24

Vac

T1

IN-

PUT

COM

SERIES 70

VALVE

ACTUATOR

24

Vac IN-

PUT

COM

ECONOMIZER

DAMPER

TWO - OR

THREE-WAY

HOT WATER/

STEAM VALVE

TWO - OR

THREE-WAY

CHILLER

WATER VALVE

FAN

T2

DI

GROUND

DI

GROUND

AI

GROUND

AI

GROUND

AI

GROUND

LON

JACK

LONWORKS

BUS

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

43 74-2958—1

Fig. 36. Pneumatic transducer to W7750B,C

(B shown, see triangle note 4).

To use the analo

g

outputs on the W7750C with 2-to-10V

actuators or transducers, a 500 ohm

(

1 percent or better

tolerance

)

resistor must be placed across the 2-to-10V

devices input and

g

round terminal. See Fi

g

. 37. for an

example. The resistor converts a 4 to 20 mA si

g

nal into a 2-to-

10V si

g

nal.

NOTE: Wire the 500 ohm resistor ph

y

sicall

y

as close as

possible to the driven device. If the resistor is located

far awa

y

from the driven device, it is possible that

noise will be added onto the 2-to-10V si

g

nal to

g

round line. This noise could cause an actuator to re-

position

(j

itter

)

and reduce the actuators life.

Fig. 37. RP7517,B pneumatic transducer to W7750C.

LONWORKS® Bus Termination Module

One 209541B Excel 10 FTT Termination Module is re

q

uired

for a sin

g

l

y

terminated LONWORKS Bus se

g

ment. Two

209541B Excel 10 FTT Termination Modules are re

q

uired for

a doubl

y

terminated dais

y

-chain LONWORKS Bus se

g

ment

(

see Fi

g

. 38

)

. Refer to LONWORKS Bus Wirin

g

Guidelines

form, 74-2865 for termination module placement rules.

For 209541B Excel 10 FTT Termination module placement

and wirin

g

options, see Fi

g

. 39.

24 VAC

24 (H)

24 (N)

24 (H)

24 (N)

INCREASE

DECREASE

24 VAC

W7750B,C CONSTANT

VOLUME AHU

CONTROLLER

MMC325 PNEUMATIC

TRANSDUCER

1

2

3

4

4

MAKE SURE ALL TRANSFORMER/POWER WIRING IS AS SHOWN;

REVERSING TERMINATIONS RESULTS IN EQUIPMENT

MALFUNCTION.

OPTIONAL 24 VAC WIRING TO NEXT CONTROLLER.

USE 1/4 IN (6 MM) PNEUMATIC TUBING. MINIMUM BRANCH LINE

MUST BE 6 FT. (1.8M) OR LONGER.

TERMINALS 16,17, 18 ARE ANALOG OUTPUTS (W7750C ONLY).

31 30 29 28 27 26 25 24 23 22 21 20

24 VAC COM

19 18 17 16

+

-

3

2

1

OUT 7

OUT 6

OUT 5

OUT 4

OUT 8

OUT 1

OUT 3

OUT 2

DI-2

DI-4

DI-1

DI-3

DI

GROUND

DI

GROUND

PNEUMATIC

VALVE

M10078C

M

B

M

24 VAC

24 VAC

W7750C CONSTANT

VOLUME AHU

CONTROLLER

RP7517B PNEUMATIC TRANSDUCER

1

2

3

3

ANALOG OUTPUTS FROM W7750C ARE 4 TO 20 mA SIGNALS. A 500 OHM

1% TOLERANCE (OR BETTER) PRECISION RESISTOR IS REQUIRED TO

DRIVE THIS (RP7517B) AND OTHER 2 TO 10V DEVICES. PLACE THIS

RESISTOR AS CLOSE AS POSSIBLE TO THE DRIVEN DEVICE.

USE 1/4 IN (6 MM) PNEUMATIC TUBING. MINIMUM BRANCH LINE

MUST BE 6 FT. (1.8M) OR LONGER.

TERMINALS 16 TO 18 ARE ANALOG OUTPUTS (W7750C ONLY).

31 30 29 28 27 26 25 24 23 22 21 20

24 VAC COM

19 18 17 16

+

-

2

1

AO 2

AO 1

BLACK

BLUE

BROWN

OUT 5

OUT 4

AO 3

OUT 1

OUT 3

OUT 2

DI-2

DI-4

DI-1

DI-3

PNEUMATIC

VALVE

ACTUATOR

500

M17368

RP7517B

1

M2

B

M

DI

GROUND

DI

GROUND

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

74-2958—144

Fig. 38. Typical doubly terminated daisy-chain LONWORKS® Bus segment termination module wiring diagram.

M10519A

PART NO. 209541B

TERMINATION

MODULE

PART NO. 209541B

TERMINATION

MODULE

W7750B, C

1415 1415

W7750B, C

1415

W7750B, C

BROWN BROWN

ORANGE

ORANGE

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

45 74-2958—1

Fig. 39. LONWORKS® Bus termination wiring options.

Step 5. Order Equipment

After compilin

g

a bill of materials throu

g

h completion of the

previous application steps, refer to Table 11 for orderin

g

information. Contact Hone

y

well for information about

Controllers and Wall Modules with no lo

g

o. See Table 11.

Excel 10 W7750 Controller Orderin

g

Information.

M11618A

W7750

(D) LONWORKS Bus Termination network

switches in the Q7740A, B Repeaters

(C) LONWORKS Bus Termination Module installed

at 2 x 4 or 60 mm box-mounted T7770

(E) Installing LONWORKS Bus Termination

Module at W7751H (terminals 11 and 12) (F) Twist wires and attach wire nuts to RJ-45 Adapter

cables, LONWORKS Bus segment wires and Termination

Module to connect to a Q7751A,B Router

(B) Installing LONWORKS Bus

Termination Module at W7750

(A) Enabling Internal Termination Network using

jumpers in the Q7750A Zone Manager

RJ-45

PLUG

PART NO. 209541B

TERMINATION

MODULE

LONWORKS

BUS

WIRE NUTS

LONWORKS BUS

TERMINAL BLOCK

FOR Q7750A

ZONE MANAGER

INSERT INTO TERMINALS 1 AND 2 WITH THE

LONWORKS BUS WIRE. TERMINATION MODULE IS

PHYSICALLY LOCATED BEHIND THE T7770

INSIDE THE 2 X 4 OR 60 MM BOX.

Q7751A LONWORKS BUS

ROUTER

LONWORKS BUS

8

7

6

5

4

3

LONWORKS BUS

LONWORKS BUS

INTERNAL

TERMINATION

NETWORK

INTERNAL

TERMINATION

NETWORK FIELD INSTALLED JUMPER

FIELD INSTALLED

JUMPER

LONWORKS BUS

NET 2

SINGLY

TERMINATED SEGMENT

USE FOR DOUBLY

TERMINATED

DAISY-CHAIN

SEGMENT

PART NO. 209541B

TERMINATION

MODULE

PART NO.

209541B

TERMINATION MODULE

PART NO.

209541B

TERMINATION

MODULE

O I II O I II

O I II O I II

AB

CD

SWITCHES ON SIDE, UNDER

Q7740A,B CIRCUIT BOARD.

USE SMALL FLAT OBJECT TO

MOVE THE SWITCHES

AS NEEDED FROM

POSITION O (NO TERMINATION)

POSITION I (SINGLY TERMINATED)

POSITION II (DOUBLY TERMINATED)

SEGMENTS

LABEL ON Q7740B 4 WAY REPEATER

Q7740B 4 WAY REPEATER SHOWN,

Q7740A 2 WAY REPEATER HAS TWO SWITCHES.

NOTE:

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

74-2958—146

Table 11. Excel 10 W7750 Controller Ordering Information.

Part Number Product Description Comments

Excel 10 W7750 Controllers:

W7750A2005 Constant Volume AHU Controller

(

W7750A

)

Three Analo

g

Inputs, Three Di

g

ital Inputs and

Six 24 Vac Rela

y

Outputs

W7750B2011 Constant Volume AHU Controller

(

W7750B

)

Six Analo

g

Inputs, Five Di

g

ital Inputs and Ei

g

ht

(

Hi

g

h-side Low-side switchable

)

Triac Outputs

W7750C2001 Constant Volume AHU Controller

(

W7750C

)

Six Analo

g

Inputs, Five Di

g

ital Inputs, Five Triac

Outputs and Three Analo

g

Outputs

T7770 and T7560 Wall Modules:

T7770A1006 Sensor with Hone

y

well Lo

g

o Used with Excel 5000 and Excel 10 Controllers

T7770A1014 Sensor with No Lo

g

o Used with Excel 5000 and Excel 10 Controllers

T7770A2004 Sensor, LONWORKS Jack and Hone

y

well Lo

g

o Used with Excel 5000 and Excel 10 Controllers

T7770A2012 Sensor with LONWORKS Jack and No Lo

g

o Used with Excel 5000 and Excel 10 Controllers

T7770B1004 Sensor with Setpoint and LONWORKS Jack,

Hone

y

well Lo

g

oDe

g

rees F Absolute

T7770B1046 Sensor with Setpoint and LONWORKS Jack,

Hone

y

well Lo

g

oRelative Setpoint

T7770B1012 Sensor with Setpoint and LONWORKS Jack, No

Lo

g

oDe

g

rees F Absolute

T7770B1020 Sensor with Setpoint and LONWORKS Jack,

Hone

y

well Lo

g

oDe

g

rees C Absolute

T7770B1053 Sensor with Setpoint and LONWORKS Jack, No

Lo

g

oRelative Setpoint

T7770B1038 Sensor with Setpoint and LONWORKS Jack, No

Lo

g

oDe

g

rees C Absolute

T7770C1002 Sensor with Setpoint, B

y

pass/LED and

LONWORKS Jack, Hone

y

well Lo

g

oDe

g

rees F Absolute

T7770C1044 Sensor with Setpoint, B

y

pass/LED and

LONWORKS Jack, Hone

y

well Lo

g

oRelative Setpoint

T7770C1010 Sensor with Setpoint, B

y

pass/LED and

LONWORKS Jack, No Lo

g

oDe

g

rees F Absolute

T7770C1028 Sensor with Setpoint, B

y

pass/LED and

LONWORKS Jack, Hone

y

well Lo

g

oDe

g

rees C Absolute

T7770C1051 Sensor with Setpoint, B

y

pass/LED and

LONWORKS Jack, No Lo

g

oRelative Setpoint

T7770C1036 Sensor with Setpoint, B

y

pass/LED and

LONWORKS Jack, No Lo

g

oDe

g

rees C Absolute

T7770D1000 Sensor with B

y

pass/LED and LONWORKS Jack,

Hone

y

well Lo

g

oDe

g

rees F Absolute

T7770D1018 Sensor with B

y

pass/LED and LONWORKS Jack,

No Lo

g

oDe

g

rees C Absolute

T7560A1018 Di

g

ital Wall Module with Sensor, Setpoint and

B

y

pass/LCD, Hone

y

well Lo

g

o

T7560A1016 Di

g

ital Wall Module with Sensor, Setpoint,

B

y

pass/LCD and Humidit

y

, Hone

y

well Lo

g

o

Sensors:

C7770A1006 Air Temperature Sensor. 20 Kohm NTC

nonlinearized Duct-mounted sensor that functions as a

primar

y

and/or secondar

y

sensor.

C7031J1050 Avera

g

in

g

Dischar

g

e/Return Air Temperature

Sensor. 20 Kohm NTC Duct element cord len

g

th 12 ft.

(

3.7m

)

.

C7031B1033 Dischar

g

e Air or Hot Water Temperature

Sensor. 20 Kohm NTC Use 112622AA Immersion Well.

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

47 74-2958—1

C7031C1031 Duct Dischar

g

e/Return Air Sensor. 20 Kohm 18 in.

(

457mm

)

insertion len

g

th.

C7031D1062 Hot or chilled Water Temperature Sensor. 20

Kohm NTC —

C7031F1018 Outside Air Temperature Sensor. 20 Kohm

NTC W7750B,C onl

y

C7031K1017 Hot or chilled Water Temperature Sensor. 20

Kohm NTC Strap-on

C7100A1015 Avera

g

in

g

Dischar

g

e/Return Air Temperature

Sensor. PT3000 13 in.

(

330mm

)

insertion len

g

th.

C7170A1002 Outdoor Air Temperature Sensor. PT3000 —

Echelon Based Components and Parts:

Q7750A2003 Excel 10 Zone Mana

g

er Free Topolo

gy

Tranceiver

(

FTT

)

Q7751A2002 Router

(

FTT

)

Q7751B2000 Router Twisted Pair Tranceiver

(

78 kbps

)

to FTT

Q7752A2001 Serial Interface

(

FTT

)

Q7752A2009 Serial Interface

(

PCMCIA card

)

(

FTT

)

Q7740A1008 Excel 10 2-Wa

y

Repeater Used to extend the len

g

th of the LONWORKS

Bus. Contains built in termination modules.

Q7740B1006 Excel 10 4-Wa

y

Repeater Used to extend the len

g

th of the LONWORKS

Bus. Contains built in termination modules.

XD 505A Standard C-Bus Communications Submodule —

XD 508 C-Bus Communications Submodule

(

1 me

g

abit

baud rate

)

—

209541B Termination Module One/two re

q

uired per LONWORKS Bus se

g

ment

205979 Operator Terminal Cable for LONWORKS Bus Serial interface to wall module or controller

Accessories (Sensors):

EL7680A1008 Wall Mounted Wide View Infrared Occupanc

y

Sensor —

EL7628A1007 Ceilin

g

Mounted Infrared Occupanc

y

Sensor —

EL7611A1003, EL7612A1001 Ultrasonic Occupanc

y

Sensors —

EL7630A1003,

EL7621A1002,

EL7621A1010

Power Suppl

y

/Control Units for Occupanc

y

sensors —

C7242A1006 CO2 Sensor/Monitor Use to measure the levels of carbon dioxide

C7400A1004 Solid State Enthalp

y

Sensor

(

4 to 20 mA

)

For outdoor and return air enthalp

y

C7600B1000 Solid State Humidit

y

Sensor

(

2 to 10 V

)

For outdoor and return air humidit

y

C7600C1008 Solid State Humidit

y

Sensor

(

4 to 20 mA

)

For outdoor and return air humidit

y

C7600C1018 Solid State Humidit

y

Sensor

(

2 to 10 V

)

For outdoor and return air humidit

y

Accessories:

MMC325-010, MMC325-020 Pneumatic Retrofit Transducers. Select

pressure ran

g

e:

(

010

)

0 to 10 psi

(

68.97 kPa

)

or

(

020

)

0 to 20 psi

(

137.93 kPa

)

.

Use to control Pneumatic reheat valves.

MMCA530 DIN rail adapter for MMC325 Transducers —

MMCA540 Metal enclosure for MMC325 Transducers —

ML7984B3000 Valve Actuator Pulse Width Modulation

(

PWM

)

Use with V5011 or V5013 F and G Valves

ML6161B1000 Damper Actuator Series 60 —

M6410A Valve Actuator Series 60 Use with V5852/V5853/V5862/V5863 Valves

ML684A1025 Versadrive Valve Actuator with linka

g

e, Series

60 Use with V5011 and V5013 Valves

Table 11. Excel 10 W7750 Controller Ordering Information. (Continued)

Part Number Product Description Comments

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

74-2958—148

Step 6. Configure Controllers

Excel E-Vision PC Software is used to confi

g

ure W7750

Controllers to match their intended application. The E-Vision

User Guide, form number 74-2588 provides details for

operatin

g

the PC software.

W7750 Controllers are shipped from the factor

y

with a default

hardware confi

g

uration. On power-up, the controller

confi

g

uration parameters are set to the default values listed in

Table 20 in Appendix C. The controller can operate normall

y

in this mode

(

if the e

q

uipment and wirin

g

match the default

setup

)

, and

g

iven valid sensor inputs, the outputs are

controlled appropriatel

y

to maintain space temperature at the

default setpoint. The default I/O arran

g

ement for the W7750A

is printed on the terminal labels. Also see the wirin

g

details in

Fi

g

. 27 in Step 4, Prepare Wirin

g

Dia

g

rams. The labeled I/O

terminals are defined in Table 10.

Step 7. Troubleshooting

Troubleshooting Excel 10 Controllers and Wall

Modules

In addition to the followin

g

information, refer to the Installation

Instructions and Checkout and Test manual for each product.

Most products have a Checkout and Test section in their

Installation Instructions manual. If not, look for a separate

Checkout and Test manual. See the Applicable Literature

section for form numbers.

ML6464A1009 Direct Coupled Actuator, 66 lb-in. tor

q

ue,

Series 60 —

ML6474A1008 Direct Coupled Actuator, 132 lb-in. tor

q

ue,

Series 60 —

ML6185A1000 Direct Coupled Actuator, 50 lb-in. sprin

g

return Series 60

V5852A/V5862A Two-wa

y

terminal unit water valve; 0.19, 0.29,

0.47, 0.74, 1.2, and 1.9 Cv 1/2 in. npt

(

13 mm

)

or 2.9 and 4.9 Cv 3/4 in. npt

(

19 mm

)

Use with M6410 Valve Actuator. Close-off ratin

g

for 0.19 to 1.9 Cv is 65 psi; for 2.9 and 4.9, Cv is

45 psi.

(

Coefficient of volume or capacit

y

index

Cv =

g

allons per minute divided b

y

the s

q

uare

root of the pressure drop across the valve.

)

V5853A/V5863A Three-wa

y

mixin

g

terminal unit hot water valve;

0.19, 0.29, 0.47, 0.74, 1.2, and 1.9 Cv 1/2 in.

npt

(

13 mm

)

or 2.9 and 4.9 Cv 3/4 in. npt

(

19

mm

)

Use with M6410 Valve Actuator. Close-off ratin

g

for 0.19 to 0.74 Cv is 55 psi; 1.2 and 1.9 Cv is 22

psi; 2.9 and 4.9 Cv is 26 psi.

R8242A Contactor, 24 Vac coil, DPDT —

AT72D, AT88A, AK3310, etc. Transformers —

EN 50 022 DIN rail 35 mm b

y

7.5 mm

(

1-3/8 in. b

y

5/16 in.

)

Obtain locall

y

: Each controller re

q

uires 5 in.

—Two DIN rail adapters Obtain locall

y

: Part number TKAD, from Thomas

and Betts, two for each controller.

Cabling:

—Serial Interface Cable, male DB-9 to female

DB-9 or female DB-25. Obtain locall

y

from an

y

computer hardware

vendor.

Hone

y

well

AK3791

(

one twisted pair

)

AK3792

(

two twisted pairs

)

LONWORKS Bus

(

plenum

)

: 22 AWG

(

0.34 mm2

)

twisted pair solid conductor, nonshielded or

Echelon approved cable.

Level IV 140°F

(

60°C

)

ratin

g

Hone

y

well AK3781

(

one

twisted pair

)

AK3782

(

two

twisted pairs

)

LONWORKS Bus

(

nonplenum

)

: 22 AWG

(

0.34

mm2

)

twisted pair solid conductor, nonshielded

or Echelon approved cable.

Level IV 140°F

(

60°C

)

ratin

g

Hone

y

well AK3725 Inputs: 18 AWG

(

1.0 mm2

)

five wire cable

bundle Standard thermostat wire

Hone

y

well AK3752

(

t

y

pical or

e

q

uivalent

)

Outputs/Power: 14 to 18 AWG

(

2.0 to 1.0 mm2

)

NEC Class 2 140°F

(

60°C

)

ratin

g

Hone

y

well AK3702

(

t

y

pical or

e

q

uivalent

)

18 AWG

(

1.0 mm2

)

twisted pair Non-plenum

Hone

y

well AK3712

(

t

y

pical or

e

q

uivalent

)

16 AWG

(

1.3 mm2

)

twisted pair Non-plenum

Hone

y

well AK3754

(

t

y

pical or

e

q

uivalent

)

14 AWG

(

2.0 mm2

)

two conductor Non-plenum

Table 11. Excel 10 W7750 Controller Ordering Information. (Continued)

Part Number Product Description Comments

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

49 74-2958—1

1. Check the version numbers of the controller firmware,

E-Vision and the E-Vision script.

2. Check the wirin

g

to the power suppl

y

and make sure

there is a

g

ood earth

g

round to the controller.

3. Check the occupanc

y

and HVAC modes.

4. Compare the current actual setpoint with the actual

space temperature.

5. Check the desired confi

g

uration settin

g

s.

6. Check the network wirin

g

and t

y

pe of wire used.

7. Check the Zone Mana

g

er mappin

g

and referred points.

NOTE: If the fan shuts off periodicall

y

for no specific reason

and the controller restarts the fan b

y

itself after about

20 to 60 seconds, the cause could be a bad Air Flow

switch. If the controller has a di

g

ital input assi

g

ned

as a Proof of Air Flow input, tr

y

unconfi

g

urin

g

this

di

g

ital input to see if these shutdowns continue. If

not, ad

j

ust or replace the Air Flow switch to

g

et it

workin

g

.

Temperature Sensor and Setpoint Potentiometer

Resistance Ranges

The T7770 or T7560A,B Wall Modules or the C7770A Air

Temperature Sensor has the followin

g

specified calibration

points, which are plotted in Fi

g

. 40:

Temperature (°F) Resistance Value (ohms)

98 11755

80 18478

70 24028

60 31525

42 52675

The T7770 Wall Module setpoint potentiometers have the

followin

g

calibration points:

Temperature (°F) Resistance Value (ohms)

85 1290

70 5500

55 9846

Fig. 40. Temperature sensor resistance plots.

Alarms

When an Excel 10 has an alarm condition, it reports it to the

central node on the LONWORKS Bus

(

t

y

picall

y

, the Excel 10

Zone Mana

g

er

)

. See Table 12. Information contained in an

alarm messa

g

e is:

•Subnet Number:

LONWORKS Bus subnet that contains the Excel 10 node

that has the alarm condition. Subnet 1 is on the Zone

Mana

g

er side of the router; Subnet 2 is on the other

side.

•Node Number:

Excel 10 node that has the alarm condition

(

see

Network Alarm

)

.

•Alarm T

y

pe:

Specific alarm bein

g

issued. An Excel 10 can provide

the alarm t

y

pes listed in Table 12.

.

TEMPERATURE (DEGREES)

oF

30 40 50 60 70 80 90 100 110

010 20 30 40

RESISTANCE (OHMS)

20K OHM AT

77

o

F (25

o

C)

80K

70K

60K

50K

40K

30K

20K

10K

oC

M11620

AIR TEMPERATURE SENSOR

10K OHM SETPOINT POT

RESISTANCE VALUES

Table 12. Excel 10 Alarms.

Name of alarm or error bit Alarm type

number Meaning of alarm code or error bit

RETURN_TO_NORMAL 128U Return to no alarm after bein

g

in an alarm condition. This code is added

numericall

y

to another alarm code to indicate that the alarm condition has

returned to normal.

ALARM_NOTIFY_DISABLED 255U The alarm reportin

g

was turned off b

y

DestManMode. No more alarms are

reported until DestManMode turns on alarm reportin

g

or on application restart.

NO_ALARM 0 No alarms presentl

y

detected.

INPUT_NV_FAILURE 1 One or more NV inputs have failed in receivin

g

an update within their specified

FAILURE_DETECT_TIME.

NODE_DISABLED 2 The control al

g

orithm has stopped because the controller is in

DISABLED_MODE, MANUAL or FACTORY_TEST mode. No more alarms are

reported when the controller is in the DISABLED_MODE. Alarms continue to be

reported if the controller is in the MANUAL or FACTORY_TEST mode.

SENSOR_FAILURE 3 One or more sensors have failed.

FROST_PROTECTION_ALARM 4 The space temperature is below the frost alarm limit 42.8°F

(

6°C

)

when the

mode is FREEZE_PROTECT. The alarm condition remains until the temperature

exceeds the alarm limit plus h

y

sterisis.

INVALID_SET_POINT 5 One of the setpoints is not in the valid ran

g

e.

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

74-2958—150

NOTE: The node can be reset b

y

switchin

g

the node to

MANUAL and then to the normal operatin

g

mode

(

see Fan Operation in Appendix B

)

.

Also, the Excel 10 variables,

AlarmLogX

where

X

is 1 throu

g

h

5, that store the last five alarms to occur in the controller, are

available. These points can be viewed throu

g

h XBS or

E-Vision.

Certain alarm conditions are suppressed conditionall

y

as

follows:

Broadcasting the Service Message

The Service Messa

g

e allows a device on the LONWORKS Bus

to be positivel

y

identified. The Service Messa

g

e contains the

controller ID number and, therefore, can be used to confirm

the ph

y

sical location of a particular Excel 10 in a buildin

g

.

There are three methods of broadcastin

g

the Service

Messa

g

e from an Excel 10 W7750 Controller. One uses a

hardware service pin button on the side of the controller

(

see

Fi

g

. 41

)

. The second uses the wall module pushbutton

(

see

Fi

g

. 43 and 44

)

. B

y

pressin

g

the wall module pushbutton for

more than four seconds, the controller sends out the Service

Messa

g

e. The third involves usin

g

the PC Confi

g

uration tool,

as follows.

When an

Assign ID

command is issued from the

commissionin

g

tool, the node

g

oes into the

SERVICE_MESSAGE mode for five minutes. In the

SERVICE_MESSAGE mode, pressin

g

the Occupanc

y

Override button on the remote wall module

(

refer to Fi

g

. 43

and 44 for override button location

)

causes the Service

Messa

g

e to be broadcast on the network. All other functions

are normal in the SERVICE_MESSAGE mode. Even if an

Excel 10 W7750 Controller does not have an Override button

connected, it can broadcast the Service Messa

g

e on the

network b

y

temporaril

y

shortin

g

the Controller B

y

pass Input

terminal to the Sensor Ground terminal on the W7750A,B,C

(

short terminals 3 and 5

)

.

The commissionin

g

tool is used to perform the ID Assi

g

nment

task

(

see the E-Vision User’s Guide, form 74-2588

)

.

Fig. 41. Location of the Service Pin Button.

W7750 Controller Status LED

The LED on the front and center of a W7750 Controller

provides a visual indication of the status of the device. See

Fi

g

. 42. When the W7750 receives power, the LED should

appear in one of the followin

g

allowable states:

1. Off—no power to the processor.

2. Continuousl

y

On—processor is in initialized state.

3. Slow Blink—controllin

g

, normal state.

4. Fast Blink—when the Excel 10 has an alarm condition.

LOSS_OF_AIR_FLOW 6 The Fan Status DI indicates that there is no air flow when the node is

commandin

g

the fan to run. The control is shut down and disabled until power is

c

y

cled or the node is reset. See NOTE below. The alarm is not issued until

FanFailTime seconds have elapsed since the loss-of-flow condition was first

reported

DIRTY_FILTER 7 The pressure drop across the filter exceeds the limit and the filter re

q

uires

maintenance. The control runs normall

y

.

SMOKE_ALARM 8 The smoke detector has detected smoke and the node has entered an

emer

g

enc

y

state.

IAQ_OVERRIDE 9 The indoor air

q

ualit

y

sensor has detected that the indoor air

q

ualit

y

is less than

the desired standard and additional outdoor air is bein

g

brou

g

ht into the

conditioned space.

LOW_LIM_ECON_CLOSE 10 The economizer has to close be

y

ond the minimum position to prevent the

dischar

g

e air temperature from

g

oin

g

below the dischar

g

e temperature low limit.

Table 12. Excel 10 Alarms. (Continued)

Name of alarm or error bit Alarm type

number Meaning of alarm code or error bit

M10094

SERVICE

PIN

BUTTON

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

51 74-2958—1

Fig. 42. LED location on W7750.

T7770C,D Wall Module Bypass Pushbutton and

Override LED

Pressin

g

the b

y

pass pushbutton, located on the T7770C,D

Wall Modules in Fi

g

. 43, causes the override LED to displa

y

the Manual Override mode of the controller. The modes are:

Fig. 43. The T7770C,D Wall Modules LED and Bypass

pushbutton locations.

1. LED = Off. No override active.

2. LED = Continuousl

y

on. B

y

pass mode

(

timed Occupied

override

)

.

3. LED = One flash per second. Continuous Unoccupied

override.

4. LED = Two flashes per second. Remote onl

y

, continu-

ous Occupied override.

T7560A,B Digital Wall Module Bypass Pushbutton

and LCD Display Occupancy Symbols

See Fi

g

. 44 for the T7560A,B Di

g

ital Wall Module b

y

pass

pushbutton location.

Press and release the b

y

pass pushbutton, located on the

T7560A,B Di

g

ital Wall Modules in Fi

g

. 44 for more than one

second to cause the sun s

y

mbol on the bottom ri

g

ht side of

the LCD displa

y

to appear. Pressin

g

the b

y

pass pushbutton

for more than four seconds causes the controller, hard-wired

to the T7560A,B, to

g

o into continuous unoccupied override.

The T7560A,B displa

y

s the moon s

y

mbol.

Fig. 44. The T7560A,B Digital Wall Module Bypass

pushbutton location.

APPENDICES

Appendix A. Using E-Vision to Commission a

W7750 Controller.

NOTE: When commissionin

g

a CVAHU W7750 Controller,

E-Vision first checks that the actual hardware model

(

such as W7750A,B,C

)

is the same t

y

pe which was

selected from the Application Selection/Output tab. If

the t

y

pes do not match, the download does not occur

and the user-entered values in the Application

Selection screens all revert back to default values.

Sensor Calibration

The space temperature, the optional resistive and

voltage/

current

(

W7750B,C onl

y)

inputs can all be calibrated. The wall

module setpoint potentiometer

can not

be calibrated.

Perform the sensor calibration b

y

addin

g

an offset value

(

either positive or ne

g

ative

)

to the sensed value usin

g

E-Vision menus

(

see E-Vision user

g

uide, form number

74-2588

)

.

When calibratin

g

volta

g

e/current sensors on the

(

W7750B,C

)

,

the offset amount entered b

y

the user is in volts, re

g

ardless of

the inputs actual en

g

ineerin

g

units. See Appendix E for

information on how to derive the proper volta

g

e value to enter

as an offset durin

g

calibration.

Setting the Pid Parameters

The W7750 is desi

g

ned to control a wide variet

y

of

mechanical s

y

stems in man

y

t

y

pes of buildin

g

s. With this

flexibilit

y

, it is necessar

y

to verif

y

the stabilit

y

of the

temperature control in each different t

y

pe of application.

M10095A

W7750

123456789

10111

2131

415J3

31 30292

8272

625242

322 2

1201

91817 1

6

E

GND

LED BYPASS SNSR SET PT AI-1

OHM

A1-2

OHM

AI-3

V/mA

AI-4

V/mA

20VDC

OUT

DI-4

DI-3

DI-2 DI-1 VAC

24

VAC

24

COM

1

OUT

2

OUT

3

OUT

4

OUT

5

OUT

6

OUT

7

OUT

8

OUT

AI

GNDAI

GNDAI

GNDLONWORKS

-BUSLON

JACK

DI

GNDDI

GND

STATUS

LED

M11617

T7770C T7770D

OVERRIDE

LED

BYPASS

PUSHBUTTON

BYPASS

PUSHBUTTON

70

65

60

55

75

80

85

OVERRIDE

LED

M17500

BYPASS

PUSHBUTTON

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

74-2958—152

Occasionall

y

, the PID parameters re

q

uire tunin

g

to optimize

comfort and smooth e

q

uipment operation. This applies to the

W7750A,B,C Controllers.

CVAHU Controllers are confi

g

ured b

y

E-Vision with default

values of PID parameters as shown in Appendix C Table 21. If

different values for these parameters are desired, Table 13

lists some recommended values to use as a startin

g

point.

These recommended values are based on past experience

with the applications and in most cases do not re

q

uire further

ad

j

ustment.

Table 13. Recommended Values For PID Parameters.

If the PID parameters re

q

uire ad

j

ustment awa

y

from these

values,

use caution

to ensure that e

q

uipment problems do not

arise

(

see CAUTION below

)

. If an

y

chan

g

e to PID control

parameters is made, the ad

j

ustments should be

g

radual. After

each chan

g

e, the s

y

stem should be allowed to stabilize so the

effects of the chan

g

e can be accuratel

y

observed. Then

further refinements can made, as needed, until the s

y

stem is

operatin

g

as desired.

CAUTION

If lar

g

e or fre

q

uent chan

g

es to PID control parameters

are made, it is possible to cause e

q

uipment problems

such as short c

y

clin

g

compressors

(

if the sta

g

e

minimum run times were disabled in User Addresses

DisMinClTime or DisMinHtTime

)

. Other problems that

can occur include wide swin

g

s in space temperature

and excessive overdrivin

g

of modulatin

g

outputs.

If ad

j

ustment of PID parameters is re

q

uired, use the followin

g

.

In the items that follow, the term, error, refers to the difference

between the measured space temperature and the current

actual space temperature setpoint.

—The Proportional Gain

(

also called Throttlin

g

Ran

g

e

)

determines how much impact the error has on the output

si

g

nal. Decreasin

g

the Proportional Gain amplifies the

effect of the error; that is, for a

g

iven error, a small

Proportional Gain causes a hi

g

her output si

g

nal value.

—The Integral Gain

(

also called Inte

g

ral Time

)

determines

how much impact the error-over-time has on the output

si

g

nal. Error-over-time has two components makin

g

up its

value: the amount of time the error exists; and the size of

the error. The hi

g

her the Inte

g

ral Gain, the slower the

control response. In other words, a decrease in Inte

g

ral

Gain causes a more rapid response in the output si

g

nal.

—The Derivative Gain

(

also called Derivative Time

)

determines how much impact the error rate has on the

output si

g

nal. The error rate is how fast the error value is

chan

g

in

g

. It can also be the direction the space

temperature is

g

oin

g

, either toward or awa

y

from the

setpoint, and its speed—

q

uickl

y

or slowl

y

. A decrease in

Derivative Gain causes a

g

iven error rate to have a lar

g

er

effect on the output si

g

nal.

—The Control Band is used onl

y

for dischar

g

e temperature

control of modulatin

g

outputs, which includes controllin

g

the economizer dampers, and heatin

g

and coolin

g

valves

usin

g

Cascade Control. The Control Band dictates the

span throu

g

h which the dischar

g

e temperature must travel

to cause the output si

g

nal to

g

o from full

y

closed to full

y

open. Also, 10 percent of the Control Band value is the size

of the

deadband

around the setpoint where no actuator

motion occurs. For example, if controllin

g

a coolin

g

valve

with Cascade Control enabled and with the dischar

g

e

temperature within 0.1 X DaTempClCtrlBd of the dischar

g

e

setpoint, there is no chan

g

e in the current valve position.

The smaller the Control Band, the more responsive the

control output. A lar

g

er Control Band causes more slu

gg

ish

control. Be careful not to set the Control Band too low and

cause lar

g

e over or under shoots

(

huntin

g)

. This can

happen if the space or dischar

g

e sensors or wirin

g

are in

nois

y

environments and the value reported to the controller

is not stable

(

such that it bounces

)

. The Control Band is

used onl

y

in modulatin

g

control, and has no purpose when

sta

g

ed control is confi

g

ured.

Appendix B. Sequences of Operation.

This Appendix provides the control se

q

uences of operation for

the models of the Excel 10 W7750 CVAHU Controller. The

W7750A,B,C Controllers can be confi

g

ured to control a wide

variet

y

of possible e

q

uipment arran

g

ements. Table 14 and 15

(

copied from Tables 3 and 4

)

summarize the available options.

This Appendix provides a more detailed discussion of these

options.

Equipment Configuration

Heat

Prop.

Gain

Heat

Integ.

Gain

Heat

Deriv.

Gain

Heat

Control

Band

Cool

Prop.

Gain

Cool

Integ.

Gain

Cool

Deriv.

Gain

Cool

Control

Band

Econ

Control

Band

Single Stage 2 3000 0 10 2 3000 0 10 10

Two Stages 3 2000 0 10 3 2000 0 10 10

Three Stages 4.5 1500 0 10 4.5 1500 0 10 10

Four Stages 6 1000 0 10 6 1000 0 10 10

Series 60 Modulating (Floating) 2 750 0 10 2 750 0 10 10

PWM Modulating 2 900 0 10 2 900 0 10 10

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

53 74-2958—1

Common Operations

The Excel 10 W7750 Controller applications have man

y

common operations that are applicable re

g

ardless of the t

y

pe

of heatin

g

, coolin

g

, or economizer e

q

uipment confi

g

uration.

These operations are available to the W7750A and the

W7750B,C Versions of the CVAHU Controller, and the I/O and

network confi

g

urations for them are summarized in Table 14.

Available input options are from the wall module and the

hard-wired analo

g

and di

g

ital inputs. Each application can

have onl

y

a subset of these devices confi

g

ured based on the

number of ph

y

sical I/O points available. However, some of the

inputs are available over the LONWORKS Bus network.

NOTE: Each W7750 Controller

must

have a space

temperature sensor input either wired directl

y

to the

controller, or shared from another LONWORKS Bus

device, and must have a di

g

ital output confi

g

ured for

controllin

g

the suppl

y

fan. In addition, if modulatin

g

economizer control is desired, a dischar

g

e air

temperature sensor

must

be ph

y

sicall

y

connected to

the Excel 10 W7750 Controller. A dischar

g

e

temperature si

g

nal

cannot

be brou

g

ht into the

controller throu

g

h the LONWORKS Bus network.

Table 14. Common Configuration Options Summary For W7750A,B,C Controllers.

Option Possible Configurations Common To All W7750 Models

Supply Fan 1. Mandator

y

Di

g

ital Output.

Type of Air Handler 1. Conventional.

2. Heat Pump.

Occupancy Sensor 1. None.

2. Connected: Contacts closed e

q

uals Occupied.

3. Network

(

Occ/Unocc si

g

nal received via the LONWORKS Bus network

)

.

Window Sensor 1. None.

2. Ph

y

sicall

y

Connected: Contacts closed e

q

uals window closed.

3. Network

(

Window Open/Closed si

g

nal received via the LONWORKS Bus

)

.

Wall Module Option 1. Local

(

direct wired to the controller

)

.

(

The T77560A,B has no LONWORKS Bus access

)

2. Network

(

sensor value received via the LONWORKS Bus

)

.

Wall Module Type 1. Sensor onl

y

.

(

All wall modules have a LONWORKS Bus access 2. Sensor and Setpoint ad

j

ust.

j

ack except T7560A,B

)

3. Sensor, Setpoint ad

j

ust and B

y

pass.

4. Sensor and B

y

pass.

Smoke Emergency Initiation 1. None.

2. Ph

y

sicall

y

Connected: Contacts closed e

q

uals smoke detected.

3. Network

(

Emer

g

enc

y

/Normal si

g

nal received via the LONWORKS Bus

)

.

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

74-2958—154

Table 15. Configuration Options Summary For W7750A,B,C Controllers.

ROOM TEMPERATURE SENSOR (RmTemp)

This is the room space temperature sensor. This sensor is the

T7770 or the T7560A,B Wall Module. When it is confi

g

ured, it

provides the temperature input for the W7750 temperature

control loop. If it is not confi

g

ured, it is re

q

uired that a room

temperature sensor value be transmitted from another

LONWORKS Bus device. If no valid room temperature value is

available to the W7750 Controller, the temperature control

al

g

orithm in the controller is disabled, causin

g

the heatin

g

,

coolin

g

, and economizer control outputs to be turned off. If the

W7750 Controller is confi

g

ured for Continuous Fan

(

rather

Option Possible Configurations for the

W7750A Model Possible Configurations for the W7750B,C Models

Type of 1. One sta

g

e. 1. One sta

g

e.

Heating 2. Two sta

g

es. 2. Two sta

g

es.

3. Three sta

g

es. 3. Three sta

g

es.

4. Four sta

g

es. 4. Four sta

g

es.

5. None. 5. Series 60 Modulatin

g

electric valve, or pneumatic via transducer.

6. Pulse Width Modulatin

g

electric valve, or pneumatic via transducer.

7. None.

Type of 1. One sta

g

e. 1. One sta

g

e.

Cooling 2. Two sta

g

es. 2. Two sta

g

es.

3. Three sta

g

es. 3. Three sta

g

es.

4. Four sta

g

es. 4. Four sta

g

es.

5. None. 5. Series 60 Modulatin

g

electric valve, or pneumatic via transducer.

6. Pulse Width Modulatin

g

electric valve, or pneumatic via transducer.

7. None.

Type of

Economizer 1. Di

g

ital Output Enable/Disable

si

g

nal for controllin

g

an external

economizer packa

g

e.

1. Di

g

ital Output Enable/Disable si

g

nal for controllin

g

an external

economizer packa

g

e.

2. Series 60 Modulatin

g

electric

damper motor, or pneumatic via

transducer.

2. Series 60 Modulatin

g

electric damper motor, or pneumatic via

transducer.

3. None. 3. Pulse Width Modulatin

g

electric damper motor, or pneumatic via

transducer.

4. None.

IAQ Option 1. None. 1. None.

2. Local IAQ Di

g

ital Input—directl

y

wired to the controller.

(

Contacts

closed means poor IAQ is

detected.

)

2. Local IAQ Di

g

ital Input—directl

y

wired to the controller.

(

Contacts

closed means poor IAQ is detected.

)

3. Network

(

IAQ Override si

g

nal

received via the LONWORKS Bus

)

.3. Network

(

IAQ Override si

g

nal received via the LONWORKS Bus

)

.

4. Local CO2 Analo

g

Input—directl

y

wired to the controller.

(

The sensor

must be a 0 to 10V device representin

g

0 to 2000 PPM CO2.

)

Coil Freeze 1. None. 1. None.

Stat Option 2. Local Coil Freeze Stat Di

g

ital

Input—directl

y

wired to the controller.

(

Contacts closed means that coil

freeze condition is sensed.

)

2. Local Coil Freeze Stat Di

g

ital Input—directl

y

wired to the controller.

(

Contacts closed means that coil freeze condition is sensed.

)

Filter Monitor 1. None. 1. None.

Option 2. Local Dirt

y

Filter Di

g

ital

Input—directl

y

wired to the

controller.

(

Contacts closed means

that the filter is dirt

y

.

)

2. Local Dirt

y

Filter Di

g

ital Input—directl

y

wired to the controller.

(

Contacts closed means that the filter is dirt

y

.

)

3. Local Analo

g

Input for Differential Pressure across the Filter

(

directl

y

wired to the controller

)

. The sensor must be a 2 to 10V device

representin

g

0 to 5 inw

(

1.25 kPa

)

.

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

55 74-2958—1

than Intermittent Fan

(

see Fan Operation in this Appendix

)

,

and the mode is Occupied when the RmTemp value becomes

invalid, the fan continues to run.

REMOTE SETPOINT (RmtStptPot)

This is the Setpoint Potentiometer contained in the T7770 or

the T7560A,B Wall Module. When confi

g

ured, this occupant

value is set to calculate the actual coolin

g

or heatin

g

Occupied Setpoint. There are two options for how to calculate

the actual setpoint to be used b

y

the temperature control

al

g

orithm:

(

Offset

)

and

(

Absolute Middle

)

. When SetPtKnob is

set to Offset, the Wall Module setpoint knob represents a

number from -9° to +9°F

(

-5° to +5°C

)

which is added to the

software occupied setpoints for the heat and the cool modes

(

CoolOccSpt and HeatOccSpt

)

. When SetPtKnob is set to

Absolute Middle, the setpoint knob becomes the center of the

Zero Ener

gy

Band

(

ZEB

)

between the coolin

g

and heatin

g

occupied setpoints. The size of the ZEB is found b

y

takin

g

the

difference between the software heatin

g

and coolin

g

occupied

setpoints; therefore, for Absolute Middle, the actual setpoints

are found as follows:

ActualCoolSpt

=

RmtStptPot +

(

CoolOccSpt - HeatOccSpt

)

/ 2

ActualHeatSpt

=

RmtStptPot -

(

CoolOccSpt - HeatOccSpt

)

/ 2

Durin

g

Standb

y

and Unoccupied times, the remote setpoint

pot is not referenced, and the software setpoints for those

modes are used instead.

SETPOINT LIMITS (LoSetptLim AND HiSetptLim)

Remote setpoint pot limits are provided b

y

LoSetptLim and

HiSetptLim. The occupied setpoints used in the control

al

g

orithms are limited b

y

these parameters. When the setpoint

knob is confi

g

ured to be of t

y

pe Absolute Middle, the lowest

actual setpoint allowed is e

q

ual to LoSetptLim, and the

hi

g

hest actual setpoint allowed is e

q

ual to HiSetptLim. When

the setpoint knob is confi

g

ured to be an Offset t

y

pe, the lowest

actual setpoint allowed is e

q

ual to HeatOccSpt - LoSetptLim,

and the hi

g

hest allowed is e

q

ual to CoolOccSpt + HiSetptLim.

BYPASS MODE (StatusOvrd AND StatusLed)

Durin

g

Unoccupied periods, the facilit

y

occupant can re

q

uest

that Occupied temperature control setpoints be observed b

y

depressin

g

the B

y

pass pushbutton on the wall module. When

activated, the controller remains in B

y

pass mode until:

1. B

y

pass Duration Settin

g

has timed out

(

B

y

pTime

)

, or

2. User a

g

ain presses the Wall Module pushbutton to

switch off B

y

pass mode, or

3. Occupanc

y

schedule

(

DestSchedOcc network input or

TimeClckOcc di

g

ital input

)

switches the mode to

Occupied.

4. User sets the DestManOcc network point to Not

Assi

g

ned.

The LED on the T7770 Wall Module

(

Override LED

)

indicates

the current b

y

pass mode status

(

see the T7770C,D Wall

Module B

y

pass Pushbutton and Override LED section

)

. The

LCD on the T7560 Di

g

ital Wall Module indicates the current

b

y

pass mode status

(

see the T7560A,B Di

g

ital Wall Module

B

y

pass Pushbutton and LCD Occupanc

y

S

y

mbols section

)

.

BypassTime

B

y

passTime is the time between the pressin

g

of the override

button at the wall module

(

or initiatin

g

OC_BYPASS via

nviManOcc

)

and the return to the ori

g

inal occupanc

y

state.

When the b

y

pass state has been activated, the b

y

pass timer

is set to B

y

passTime

(

default of 180 minutes

)

.

OverrideType

OverrideT

y

pe specifies the behavior of the override button on

the wall module. There are three possible states that have the

followin

g

meanin

g

s:

NONE disables the override button.

NORMAL causes the override button to set the OverRide

state to OC_BYPASS for B

y

passTime

(

default 180

minutes

)

, when the override button has been pressed

for approximatel

y

1 to 4 seconds, or to set the OverRide

state to UNOCC when the button has been pressed for

approximatel

y

4 to 7 seconds. When the button is

pressed lon

g

er than approximatel

y

7 seconds, then the

OverRide state is set to OC_NUL

(

no manual override is

active

)

.

BYPASS_ONLY causes the override button to set the

OverRide state to OC_BYPASS for B

y

passTime

(

default

180 minutes

)

, on the first press

(

1 to 7 seconds

)

. On the

next press, the OverRide state is set to OC_NUL

(

no

manual over ride is active

)

.

OverridePriority

OverridePriorit

y

confi

g

ures the override arbitration between

nviManOcc, nviB

y

pass.state, and the wall module override

button. There are two possible states which have the followin

g

meanin

g

s:

LAST specifies that the last command received from either

the wall module or nviManOcc determines the effective

override state.

NET specifies that when nviManOcc is not OC_NUL, then

the effective occupanc

y

is nviManOcc re

g

ardless of the

wall module override state.

CYCLES PER HOUR (ubHeatCph AND ubCoolCph)

ubHeatCph specifies the mid-load number of on / off c

y

cles

per hour

(

default is 6

)

, when the mode is HEAT. ubCoolCph

specifies the mid-load number of on / off c

y

cles per hour

(

default is 3

)

, when the mode is COOL. This is to protect the

mechanical e

q

uipment a

g

ainst short c

y

clin

g

causin

g

excessive wear. In addition the c

y

cle rate specifies the

minimum on and off time accordin

g

to Table 17.

T7770C,D OR T7560A,B WALL MODULE BYPASS PUSHBUTTON

OPERATION

The Wall Module B

y

pass pushbutton is located on both the

T7770C,D or the T7560A,B Wall Modules, see Fi

g

. 43 and 44.

The b

y

pass pushbutton can chan

g

e the controller into various

occupanc

y

modes, see Table 16.

Table 16. Bypass Pushbutton Operation.

NOTES: If the pushbutton is held down for lon

g

er than seven

seconds, the controller reverts back to No Override

and repeats the c

y

cle above. See Fi

g

. 45.

Continuous Occupied override mode can onl

y

be

initiated remotel

y

; that is, over the LONWORKS Bus

network.

If the pushbutton is

held down for But for not

more than The resulting mode is

Less than 1 second —No Override is active

1 second 4 seconds B

y

pass

(

a timed Occupied

Override

)

4 seconds 7 seconds Continuous Unoccupied

Override

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

74-2958—156

Fig. 45. LED and Bypass pushbutton operation.

STANDBY MODE (StatusOcySen)

The di

g

ital input for an occupanc

y

sensor

(

usuall

y

a motion

detector or possibl

y

a time clock

)

provides the controller with a

means to enter an ener

gy

-savin

g

Standb

y

mode whenever

people are not in the room. Standb

y

mode occurs when the

scheduled occupanc

y

is Occupied, and the occupanc

y

sensor

detects no people currentl

y

in the room

(

di

g

ital input contacts

Closed means people are in the room, and contacts Open

means the room is Unoccupied

)

. When in Standb

y

mode, the

Excel 10 W7750 Controller uses the Standb

y

Coolin

g

Setpoint

for coolin

g

(

CoolStb

y

Spt

)

, or the Standb

y

Heatin

g

Setpoint for

Heatin

g

(

HeatStb

y

Spt

)

as the Actual Space Temperature

Setpoint. The occupanc

y

sensor si

g

nal can also be a network

input from another LONWORKS Bus device, so that no ph

y

sical

sensor is re

q

uired at the receivin

g

W7750 Controller.

IMPORTANT

When the W7750 Controller is in Standby mode, the

economizer minimum position setting is

not

observed. This means the fresh air dampers will go

fully closed if there is no call for cooling.

CONTINUOUS UNOCCUPIED MODE

This mode is entered when a wall module is confi

g

ured with a

B

y

pass pushbutton that was pressed for four to seven

seconds causin

g

the wall module LED/LCD to blink. This

mode can also be entered via a network command

(

ManualOcc set to Unoccupied

)

. If the controller is in this

mode, it reverts to the Unoccupied setpoints for temperature

control, and the economizer does not observe its minimum

position settin

g

. The controller remains in this mode

indefinitel

y

until the B

y

pass pushbutton is pressed to exit the

mode or a network command is sent to clear the mode. A

confi

g

uration parameter is available to disable wall-module

initiation of Continuous Unoccupied mode

(

OvrdT

y

pe

)

.

OCCUPANCY MODE AND MANUAL OVERRIDE ARBITRATION

The W7750 has multiple sources for occupanc

y

schedule

information and, therefore, it emplo

y

s an arbitration scheme to

determine the current actual mode. Time-of-da

y

(

TOD

)

schedule status comes from two sources, a confi

g

ured di

g

ital

input for OccTimeClock or the DestSchedOcc network input

received from a central control. If the di

g

ital input source is

confi

g

ured, it has hi

g

hest priorit

y

and determines the

Occupanc

y

mode. This di

g

ital input is either ON

(

shorted =

occupied

)

, OFF

(

open = unoccupied

)

, or not active

(

not

confi

g

ured

)

; otherwise, the status is determined b

y

the

DestSchedOcc input from the network source. The

DestSchedOcc has three possible states, occupied,

unoccupied or standb

y

.

Manual Override Status can be derived from three sources

and

g

overned b

y

two selectable arbitration schemes. The two

schemes are:

•Network Wins or Last-in Wins, as set in OvrdPriorit

y

.

The three sources of manual override status are:

DestManOcc - Has possible states: Occupied,

Unoccupied, B

y

pass, Standb

y

and Not

Assi

g

ned

(

not active

)

. This input source

has the hi

g

hest priorit

y

in determinin

g

manual override status for a Network

Wins arbitration scheme, and in the

event there is more than one source

chan

g

e at a time in the Last-in Wins

arbitration scheme. Here, b

y

pass

initiates a self-timed b

y

pass of the

control unit and expires upon

completion of the defined timed period.

The controller then treats the b

y

pass

status of this input as Not Assi

g

ned until

the next chan

g

e in status.

M8483A

RESET

NOT ASSIGNED

(LED OFF)

PRESS FOR ONE

TO FOUR SECONDS

BYPASS OCCUPIED

(LED ON)

BYPASS

TIMEOUT

PRESS FOR FOUR

TO SEVEN SECONDS

PRESS FOR LESS

THAN ONE SECOND

UNOCCUPIED

(LED BLINK)

PRESS FOR LESS THAN ONE SECOND

PRESS FOR MORE THAN SEVEN SECONDS

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

57 74-2958—1

DestB

y

pass - Has possible states: B

y

pass On,

B

y

pass Off or Not Assi

g

ned

(

not active

)

.

This input places the controller in an

untimed

b

y

pass state or turns off the

b

y

pass mode. This source is second in

priorit

y

to DestManOcc under the same

arbitration schemes mentioned above.

Override Button -The wall module Override pushbutton

can command status of B

y

pass,

Continuous Unoccupied and Not

Assi

g

ned. This source has the lowest

priorit

y

status in the above mentioned

schemes. The above mention sources

of override must be either Not Assi

g

ned

or Off before the Override pushbutton

affects the manual override status in the

Network Wins scheme. All actions, in

this case, taken from the Override

pushbutton are locked out.

B

y

pass status is a controller-timed

event whose duration is set in B

y

pTime.

Upon expiration of the timer, the status

returns to Not Assi

g

ned. The status of

this input can be overridden with the

receipt of Not Assi

g

ned from

DestManOcc. This, in effect, cancels a

timed b

y

pass or a continuous

unoccupied mode.

The Override pushbutton can be

confi

g

ured as Normal

(

all of the above

mentioned states are possible

)

, B

y

pass

Onl

y

(

B

y

pass and Not Assi

g

ned onl

y)

or

None

(

effectivel

y

Disablin

g

the Override

pushbutton

)

.

TIME CLOCK (Occ_Time_Clock)

OccTimeClock is the state of the di

g

ital input confi

g

ured and

wired to a time clock. When the di

g

ital input is detected to be

Closed

(

Occupied

)

, the scheduled occupanc

y

will be

OC_OCCUPIED. If the detected state of the di

g

ital input is

Open

(

Unoccupied

)

, then the scheduled occupanc

y

will be

OC_UNOCCUPIED. If the Occ_Time_Clock is not confi

g

ured,

then either the DestSchedOcc network input received from a

central control or the time clock that is broadcast from a

Sched_Master confi

g

ured W7750, controls the occupied

mode.

SCHEDULE MASTER (Sched_Master)

Sched_Master is the state of a di

g

ital input that is confi

g

ured

and wired to the W7750. If the Sched_Master input is closed

(

input shorted

)

, the node is the schedule master and the state

of the locall

y

connected time clock will be broadcast out over

the LONWORKS Bus to the other W7750 controllers. If the

Sched_Master input is open, then the node is not a schedule

master and the local time clock will not be sent out over the

LONWORKS Bus even if the time clock input is confi

g

ured.

However, the DestSchedOcc network input received from a

central control has a hi

g

her priorit

y

than the local time clock,

and therefore overrides the local time clock. The W7750

controllers automaticall

y

bind without the need for a

confi

g

uration tool.

SETPOINT RAMPING

The W7750 Controller incorporates a rampin

g

feature that

g

raduall

y

chan

g

es the space setpoints between occupanc

y

modes. This feature is onl

y

operational if the network variable

inputs DestSchedOcc, TodEventNext, and Time Until Next

Chan

g

e Of State

(

TUNCOS

)

are bein

g

used to chan

g

e the

W7750 Occupanc

y

mode. The applicable Setpoints are

OaTempMinHtRamp, OaTempMaxHtRamp, MinHtRamp and

MaxHtRamp

(

for HEAT mode operation

)

, and

OaTempMinClRamp, OaTempMaxClRamp, MinClRamp and

MaxClRamp

(

for the COOL mode operation

)

. See Fi

g

. 46 for a

pictorial representation of how these setpoints interact.

Durin

g

recover

y

operation, the setpoint chan

g

es at a rate in

de

g

rees per hour dependin

g

on the outdoor air temperature. If

there is no outdoor air temperature sensor available, then

MinHtRamp is used as the recover

y

rate.

Fig. 46. Setpoint ramping parameters with ramp rate

calculation.

NOTE: Recover

y

rampin

g

applies between scheduled

heatin

g

or coolin

g

setpoint chan

g

es from

UNOCCUPIED to STANDBY, UNOCCUPIED to

OCCUPIED, and STANDBY to OCCUPIED.

Scheduled setpoint chan

g

es from OCCUPIED to

UNOCCUPIED or OCCUPIED to STANDBY do not

use a ramped setpoint but instead use a step chan

g

e

in setpoint. Recover

y

ramps be

g

in before the next

scheduled occupanc

y

time and are ramped from the

setpoint for the existin

g

scheduled occupanc

y

state

to the setpoint for the next occupanc

y

state.

RECOVERY RAMPING FOR HEAT PUMP SYSTEMS

When the node is controllin

g

heat pump e

q

uipment, durin

g

the

recover

y

ramps, the heatin

g

setpoint is split into a heat pump

setpoint

(

for compressors

)

and an auxiliar

y

heat setpoint

(

for

auxiliar

y

heat sta

g

es

)

. The heat pump setpoint is a step

chan

g

e at the recover

y

time prior to the OCCUPIED time.

Recover

y

time is computed from the confi

g

ured heat recover

y

ramp rate. The recover

y

time is calculated:

Recover

y

time =

(

OCC setpoint - current setpoint

)

/ramp rate

See Fi

g

. 47 for the various setpoints.

HEAT RECOVERY

RAMP RATE

(DEGREES/HOUR)

MaxHtRam

MinHtRam

OaTempMinHtRa OaTempMaxHtRam

OUTDOOR AIR

TEMPERATURE

M10109

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

74-2958—158

Fig. 47. Setpoint ramping parameters with setpoint

calculation.

Durin

g

the COOL recover

y

period, the setpoint chan

g

es at a

rate in de

g

rees per hour relative to the outdoor air

temperature. If there is no outdoor air temperature sensor

available, the MinClRamp is used as the recover

y

rate.

See Fi

g

. 48 for the various setpoints.

Fig. 48. Setpoint ramping parameters with ramp rate

calculation.

NOTES: The setpoint used durin

g

the COOL recover

y

period

is similar to the heat mode in Fi

g

. 46, except the

slope of the line reverses for coolin

g

.

Recover

y

rampin

g

applies between scheduled heat-

in

g

or coolin

g

setpoint chan

g

es from UNOCCUPIED

to STANDBY, UNOCCUPIED to OCCUPIED, and

STANDBY to OCCUPIED. Scheduled setpoint

chan

g

es from OCCUPIED to UNOCCUPIED or

OCCUPIED to STANDBY do not use a ramped set-

point, but instead, use a step chan

g

e in setpoint.

Recover

y

ramps be

g

in before the next scheduled

occupanc

y

time and are ramped from the setpoint for

the existin

g

scheduled occupanc

y

state to the set-

point for the next occupanc

y

state.

FAN OPERATION

The W7750 suppl

y

fan can be controlled in one of two

different wa

y

s. In Continuous Fan mode, the fan runs

whenever the controller is in Occupied mode. When in

Standb

y

or Unoccupied modes, the fan c

y

cles on with a call

for coolin

g

(

or heatin

g

if the FanOnHtMode parameter is set

)

.

In Intermittent Fan mode, the fan c

y

cles on with a call for

coolin

g

(

or heatin

g

if the FanOnHtMode parameter is set

)

, and

c

y

cles off when the space temperature control is satisfied.

The fan control supports an optional

(

Proof of Air Flow

)

di

g

ital

input, that allows monitorin

g

of the suppl

y

fans status. If the

fan is commanded on, the Proof of Air Flow di

g

ital input is

checked up to three times to verif

y

that the fan is runnin

g

after

an initial dela

y

of FanOnDela

y

seconds

(

user-settable

)

. If the

fan fails to start the CVAHU must be reset b

y

first c

y

clin

g

CVAHU power. If this does not work, set DestManMode to

Manual and then back to Enable. After a reset the application

restarts—all outputs switch off and auto control is enabled.

Also, the W7750 Controller provides fan-run-on operation that

keeps the fan runnin

g

for a short time after heatin

g

or coolin

g

shuts off. The amount of time that the fan continues to run is

set in FanRunOnHeat for heatin

g

mode and FanRunOnCool

for coolin

g

mode.

WINDOW SENSOR (StatusWndw)

The di

g

ital input for a window contact provides the al

g

orithm

with a means to disable its temperature control activities if

someone has opened a window or door in the room. When a

window is detected to be Open

(

di

g

ital input contacts Open

e

q

uals window open

)

, the normal temperature control is

disabled, and the W7750 Controller enters the Freeze Protect

mode. Freeze Protect mode sets the space setpoint to 46.4 °F

(

8°C

)

and brin

g

s on the fan and heat if the space temperature

falls below this setpoint. Normal temperature control resumes

on window closure. The Window sensor si

g

nal can also be a

network input from another LONWORKS Bus device, so that no

ph

y

sical sensor is re

q

uired at the receivin

g

W7750 Controller.

SMOKE CONTROL

The Excel 10 W7750 Controller supports three smoke-related

control strate

g

ies:

1. Emer

g

enc

y

Shutdown

(

all outputs off

)

.

2. Depressurize

(

fan on, outdoor air damper closed

)

.

3. Pressurize

(

fan on, outdoor air damper open

)

.

The controller is placed in one of these three control states

whenever the W7750 mode becomes

SMOKE_EMERGENCY, which can be initiated via a network

command

(

DestEmer

g

Cmd

)

or from a local

(

ph

y

sicall

y

connected

)

smoke detector di

g

ital input. When in

SMOKE_EMERGENCY mode, the W7750 Controller uses the

control strate

gy

found in SmkCtlMode

(

one of the three listed

above

)

, and the normal temperature control function is

disabled. If a W7750 local smoke detector trips, the SrcEmer

g

network variable

(

for other LONWORKS Bus devices to receive

)

is set to the Emer

g

enc

y

state.

DEMAND LIMIT CONTROL (DLC)

When The LONWORKS Bus network receives a hi

g

h-electrical-

demand si

g

nal, the controller applies a DlcBumpTemp amount

to the current actual space temperature setpoint value. The

setpoint is alwa

y

s ad

j

usted in the ener

gy

-savin

g

direction.

This means that if the W7750 Controller is in Coolin

g

mode,

the DLC offset bumps the control point up, and when in

Heatin

g

mode, bumps the control point down.

OCC setpoint

UN_OCC setpoint

OR

STANDBY setpoint

M10110

AUX HEAT

SETPOINT

HEAT PUMP

SETPOINT

(FOR COMPRESSORS)

RECOVERY TIME

OCCUPIED TIME

COOL RECOVERY

RAMP RATE

(DEGREES/HOUR)

MaxClRam

MinClRam

OaTempMinClRa OaTempMaxClRam

OUTDOOR AIR

TEMPERATURE

M10111

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

59 74-2958—1

DIRTY FILTER MONITOR

The air filter in the air handler can be monitored b

y

the W7750

and an alarm issued when the filter media needs replacement.

The two methods of monitorin

g

the filter are:

1. A differential pressure switch whose contacts are con-

nected to a di

g

ital input on the W7750A or W7750B,C;

and

2. A 2-to-10V differential pressure sensor wired to a

current input on the W7750B,C. If the analo

g

input

sensor is used, its measured value 0 to 5 inw

(

0 to 1.25 kPa

)

is compared to a user-selectable

setpoint

(

FltrPressStPt—valid ran

g

e: 0 to 5 inw

(

0 to 1.25 kPa

))

, and the Dirt

y

Filter alarm is issued

when the pressure drop across the filter exceeds the

setpoint.

START-UP

START_UP_WAIT is the first mode after application restart or

power-up. Durin

g

START_UP_WAIT, the analo

g

and di

g

ital

inputs are bein

g

read for the first time, no control al

g

orithms

are active, and the ph

y

sical outputs

(

fan and heat/coolin

g

sta

g

es

)

are in the de-ener

g

ized position. The node remains in

the START_UP_WAIT mode for a pseudo-random period

(

dependin

g

on neuron_id

)

between 12 and 22 seconds and

then transitions to one of the operatin

g

modes, dependin

g

on

the inputs that are read from the ph

y

sical and network inputs.

The pseudo random period prevents multiple controllers from

simultaneousl

y

startin

g

ma

j

or electrical loads when power is

restored to a buildin

g

.

NOTES: After a controller download via Care/E-Vision, the

dela

y

ed reset time is b

y

passed and the controller

starts after a 40-second initialization.

Not all network inputs can be received durin

g

the

START_UP_WAIT period because man

y

network

variables are updated at a slower rate; therefore

some control decisions can be considered tempo-

raril

y

inappropriate.

Temperature Control Operations

See Fi

g

. 49 for a dia

g

ram of a t

y

pical W7750 Unit.

Fig. 49. Schematic diagram for a typical W7750B Unit.

WINDOW CONTACT

OCCUPANCY

SENSOR

M

OA TEMP

FILTER

FAN

COOL

COIL

HEAT

COIL

DA TEMP

RA TEMP

EXCEL 10

W7750

CVAHU

T7770 OR T7560A,B

RETURN

AIR DISCHARGE

AIR

OUTDOOR

AIR

CEILING

ROOF

-+

M17488

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

74-2958—160

STAGED COOLING CONTROL

The Excel 10 W7750 Controller supports up to four sta

g

es of

D/X coolin

g

. As space temperature rises above the current

Coolin

g

Setpoint, the controllers mode of operation is

switched to the COOL mode. When in the COOL mode, all

heatin

g

outputs are driven closed or off

(

with the exception

that occurs durin

g

IAQ Override Operation, see above

)

, and

the sta

g

ed coolin

g

outputs are enabled for use. When in the

COOL mode, the PID coolin

g

control al

g

orithm compares the

current space temperature to the EffectiveCoolSetPt, and

calculates a PID error si

g

nal. This error si

g

nal causes the

coolin

g

sta

g

e outputs to be c

y

cled as re

q

uired to drive the

space temperature back to the setpoint. Fi

g

. 50 illustrates the

relationship between PID error and sta

g

ed output activit

y

. As

the error si

g

nal increases and the space temperature is

g

ettin

g

farther awa

y

from setpoint, or is remainin

g

above

setpoint as time elapses, additional sta

g

es of coolin

g

are

ener

g

ized until, if PID error reaches 100 percent, all

confi

g

ured sta

g

es are on.

Fig. 50. Staged output control versus PID Error.

If economizer dampers are confi

g

ured, and the outdoor air is

suitable for free coolin

g

, the economizer operates as the first

sta

g

e of coolin

g

. For example, if a controller was confi

g

ured

with two sta

g

es of mechanical coolin

g

and an economizer, the

application should be viewed in Fi

g

. 50 as a

three

-sta

g

e

s

y

stem.

Setpoints for the PID

g

ains allow for unit-b

y

-unit ad

j

ustment of

the control loop, if re

q

uired; however, an

y

chan

g

e from the

default values should be minimal.

The PID control al

g

orithm used to control sta

g

ed coolin

g

is

anticipator-driven, and is similar to the al

g

orithm used in the

T7300 commercial thermostat. All sta

g

in

g

events are sub

j

ect

to a minimum intersta

g

e time dela

y

, which is based on the

c

y

cles per hour user settin

g

(

CoolC

y

cHr

)

. The minimum

intersta

g

e time dela

y

ran

g

es from 90 seconds

(

at 12 c

y

cles

per hour

)

to 8.5 minutes

(

at two c

y

cles per hour

)

, see Table

17. The user has the option to disable the minimum run timer

(

DisMinClTimer for coolin

g)

. If the minimum run timer is

disabled, the intersta

g

e time dela

y

is fixed at 20 seconds. The

c

y

clin

g

rate is separatel

y

selectable for heatin

g

and coolin

g

between 2 and 12 c

y

cles per hour

(

cph

)

.

Table 17. Interstage Minimum Times

STAGED HEATING CONTROL

The Excel 10 W7750B,C Controller supports up to four sta

g

es

of heatin

g

. As space temperature falls below the current

Coolin

g

Setpoint, the controller mode of operation is switched

to the HEAT mode. When in the HEAT mode, all coolin

g

outputs are driven closed or off, and the sta

g

ed heatin

g

outputs are enabled for use. When in the HEAT mode, the PID

NO. STAGES

CONFIGURED

PID

ERROR

ONE STAGE

TWO STAGES

THREE STAGES

FOUR STAGES

0% 25% 33% 50% 66% 75% 100% > 100%

CYCLING

STAGE 1

CYCLING STAGE 1 LOCKED ON

STAGE 2 CYCLING

STAGE 1

CYCLING STAGE 1 LOCKED ON

STAGE 2 CYCLING STAGE 1,2 LOCKED ON

STAGE 3 CYCLING

ALL STAGES

LOCKED ON

ALL STAGES

LOCKED ON

ALL STAGES

LOCKED ON

ALL STAGES

LOCKED ON

STAGE 1

CYCLING

STAGE 1

LOCKED ON

STAGE 2

CYCLING

STAGE 1,2

LOCKED ON

STAGE 3

CYCLING

STAGE 1,2,3

LOCKED ON

STAGE 4

CYCLING

M10112

Cycles/Hour Selection Minimum On/Off time (Min.)

28.5

35.5

44.0

53.5

63.0

72.5

82.0

92.0

10 2.0

11 1.5

12 1.5

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

61 74-2958—1

coolin

g

control al

g

orithm compares the current space

temperature to the EffectiveHeatSetPt, and calculates a PID

error si

g

nal. This error si

g

nal causes the heatin

g

sta

g

e

outputs to be c

y

cled, as re

q

uired, to drive the space

temperature back to the Setpoint. Fi

g

. 50 illustrates the

relationship between PID error and sta

g

ed output activit

y

.

As the error si

g

nal increases, the space temperature

g

ets

further awa

y

from the setpoint, or is remainin

g

below the

setpoint as time elapses, additional sta

g

es of heatin

g

are

ener

g

ized until, if PID error reaches 100 percent, all

confi

g

ured sta

g

es are on.

The PID control al

g

orithm used to control sta

g

ed heatin

g

is

anticipator-driven, and is similar to the al

g

orithm used in the

T7300 commercial thermostat. All sta

g

in

g

events are sub

j

ect

to a minimum intersta

g

e time dela

y

, that is based on the

c

y

cles per hour user settin

g

(

HeatC

y

cHr

)

. The minimum

intersta

g

e time dela

y

ran

g

es from 90 seconds

(

at 12 c

y

cles

per hour

)

to ei

g

ht minutes

(

at two c

y

cles per hour

)

. See Table

17. The user has the option to disable the minimum run timer

for heatin

g

(

DisMinHtTimer

)

. If the minimum run timer is

disabled, the intersta

g

e time dela

y

is fixed at 20 seconds. The

c

y

clin

g

rate is separatel

y

selectable for heatin

g

and coolin

g

between two and 12 c

y

cles per hour

(

cph

)

.

Setpoints for the PID

g

ains allow for unit-b

y

-unit ad

j

ustment of

the control loop, if re

q

uired; however, an

y

chan

g

e from the

default values should be minimal.

CASCADE CONTROL OF MODULATING COOLING/HEATING

The Excel 10 W7750 Controller supports modulatin

g

coolin

g

and heatin

g

valves. These valves can be controlled directl

y

from the space temperature

(

like the sta

g

ed control

)

or, if the

CascCtrl fla

g

is set, the

y

are modulated to maintain the

dischar

g

e air temperature at its setpoint. The dischar

g

e air

setpoint is calculated based on the space temperature

deviation from the space setpoint. This is commonl

y

called

cascade control. In the W7750 Controller, cascade control is

available for use with PWM

(

W7750B,C onl

y)

and Series 60

modulatin

g

heatin

g

and coolin

g

, but not for use with sta

g

ed

heatin

g

/coolin

g

.

Setpoints for the PID

g

ains and for the control band allow for

unit-b

y

-unit ad

j

ustment of the control loops, if re

q

uired;

however, an

y

chan

g

e from the default values should be

minimal. Also, the W7750 Controller uses an adaptive

al

g

orithm

(

patent pendin

g)

to continuousl

y

assess the validit

y

of the calculated dischar

g

e setpoint, and ad

j

ust it, as needed,

to ensure precise, accurate control.

SERIES 60 MODULATING CONTROL

Series 60 Control is also commonl

y

referred to as Floatin

g

Control. The Excel 10 W7750A,B,C Controllers can drive

Series 60 t

y

pe actuators to control a modulatin

g

coolin

g

valve,

a heatin

g

valve, and economizer dampers. When floatin

g

control is used, the full-stroke motor drive time of the actuator

must be entered into the confi

g

uration parameter CoolMtrSpd

(

for coolin

g)

, HeatMtrSpd

(

for heatin

g)

, or EconMtrSpd

(

for the

economizer dampers

)

.

PULSE WIDTH MODULATING (PWM) CONTROL

The Excel 10 W7750B,C Controllers can drive a PWM-t

y

pe

actuator to control a modulatin

g

coolin

g

valve, a heatin

g

valve, and economizer dampers. PWM control positions the

actuator based on the len

g

th, in seconds, of the pulse from

the di

g

ital output. The controller outputs a pulse whose len

g

th

consists of two parts, a minimum and a maximum. The

minimum pulse time represents the analo

g

value of zero

percent

(

also indicates a si

g

nal presence

)

and the maximum

pulse len

g

th that represents an analo

g

value of 100 percent. If

the analo

g

value is

g

reater than zero percent, an additional

time is added to the minimum pulse time. The len

g

th of time

added is directl

y

proportional to the ma

g

nitude of the analo

g

value. If PWM control is used, the confi

g

uration parameters

for the PWM operation must be specified. These are

PwmPeriod, PwmZeroScale, and PwmFullScale. These three

parameters are shared b

y

all confi

g

ured PWM outputs; this

means the heatin

g

, coolin

g

, and economizer actuators must

be confi

g

ured to accept the same st

y

le of PWM si

g

nal.

Example: To find the pulse width of a valve actuator

(

for

example stroke mid position - 50 percent

)

with the

PwmZeroScale = 0.1 seconds, PwmFullScale = 25.5

seconds, and the PwmPeriod = 25.6 seconds. There are 256

increments available, so the number of increments re

q

uired

for 50 percent would be

(

0.5 X 256

)

or 128. The time for each

increment for this industr

y

standard pulse time is 0.1 seconds.

The pulse width is the minimum time

(

0.1 second

)

+ the

number of increments

(

128 times the

(

0.1 second

)

plus 0. 1

)

=

12.9 seconds. The W7750B,C Controllers would command

the valve output on for 12.9 seconds for the PwmPeriod of

25.6 seconds to maintain the valve position at 50 percent.

OUTDOOR AIR LOCKOUT OF HEATING/COOLING

A mechanism is provided in the W7750 to disable the heatin

g

e

q

uipment if the outdoor air temperature rises above the

OaTempHtLkOut setpoint. Similarl

y

, the coolin

g

e

q

uipment is

disabled if the outdoor air temperature falls below the

OaTempClLkOut setpoint. The al

g

orithm supplies a fixed 2°F

(

1.1°C

)

h

y

steresis with the lock-out control to prevent short

c

y

clin

g

of the e

q

uipment.

ECONOMIZER DAMPER CONTROL

A mixed-air economizer damper packa

g

e can be controlled to

assist mechanical coolin

g

in maintainin

g

the dischar

g

e air at

setpoint. Therefore, if modulatin

g

economizer damper control

is desired, a dischar

g

e air temperature sensor is re

q

uired. If

the outdoor air is not currentl

y

suitable for coolin

g

use

(

see the

Economizer Enable/Disable Control section

)

, the outdoor air

damper is held at the user-settable minimum position

(

EconMinPos

)

for ventilation purposes.

Because the outdoor air can be used to supplement

mechanical coolin

g

, the economizer operates as if it were the

first sta

g

e of coolin

g

. So, if the outdoor air is suitable for

coolin

g

use, the mechanical coolin

g

(

either sta

g

ed or

modulatin

g)

is held off until the economizer has reached its

full

y

open position. Then, if the dischar

g

e temperature

continues to be above setpoint, the mechanical coolin

g

is

allowed to come on. If the outdoor air is

not

suitable for

coolin

g

use, the economizer is set to its minimum position,

and mechanical coolin

g

is allowed to come on immediatel

y

.

When the controller is in the Heat mode, the economizer is

held at the minimum position settin

g

(

EconMinPos

)

. The

minimum position settin

g

is onl

y

used durin

g

Occupied mode

operation. When in Standb

y

or Unoccupied modes, the

outdoor air dampers are allowed to full

y

close if there is no call

for coolin

g

, or if the outside air is not suitable for coolin

g

use.

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

74-2958—162

INDOOR AIR QUALITY (IAQ) OVERRIDE

The Excel 10 W7750 Controller supports an IAQ override

feature that upon detection of poor air

q

ualit

y

in the space,

allows the economizer dampers to be opened above the

standard minimum position settin

g

to a value set in

EconIAQPos. Two different methods of detectin

g

poor air

q

ualit

y

are supported, The first is b

y

usin

g

an IAQ switch

device connected to a di

g

ital input on the W7750 Controller,

where a contact closure indicates poor air

q

ualit

y

and initiates

the IAQ override mode. The second, which is onl

y

available

on the W7750B,C is throu

g

h an analo

g

input that connects to

a CO2 Sensor

(

0 to 10V

)

. The measured value of CO2 from

this sensor

(

0 to 2000 ppm

)

is compared to the setpoint

IAQSetpt. When the CO2 level is hi

g

her than the setpoint

(

800

PPM

)

, the IAQ override is initiated. The IAQSetpt h

y

steresis is

50 PPM, IAQ override is deactivated at a CO2 level less than

750 PPM.

When the W7750 Controller is in the COOL mode durin

g

an

IAQ override, it is possible for the

heating

outputs to be

activated. This can occur if the outdoor air temperature is cold

enou

g

h to cause the dischar

g

e air temperature to drop below

the DaTempLoLim setpoint when the dampers open to the

EconIAQPos position,

and

the Ia

q

UseHeat fla

g

is set. If this

situation occurs, the heatin

g

is controlled to maintain the

dischar

g

e air temperature at 1°F

(

0.65°C

)

above the

DaTempLoLim setpoint.

FREEZE STAT

Upon receivin

g

a contact closure, the W7750 control

al

g

orithm will close the outdoor air damper and open the hot

water and chilled water valves

(

if available

)

to the full open

position as a safet

y

precaution. If

manual-reset

operation is

desired, the Freeze Stat device must provide the ph

y

sical

pushbutton, which the operator presses, to reset the s

y

stem

after a

freeze

condition has occurred.

DISCHARGE AIR LOW LIMIT CONTROL

If the dischar

g

e air temperature falls below the user-settable

dischar

g

e air low limit setpoint

(

DaTempLoLim

)

, an alarm is

issued, and the outdoor air damper is driven below the

minimum position settin

g

until the dischar

g

e temperature is up

to the low limit. If necessar

y

, the damper can

g

o completel

y

closed even durin

g

Occupied mode operation. As the

dischar

g

e temperature warms up, the economizer modulates

open until the minimum position settin

g

is reached. At this

point, the low limit alarm is cleared.

ECONOMIZER ENABLE/DISABLE CONTROL

The W7750 Controller has inputs to determine if the outdoor

air is suitable to au

g

ment coolin

g

. The economizer dampers

can be enabled/disabled for usin

g

outdoor air as the first

sta

g

e of coolin

g

based on one of ten allowable strate

g

ies:

1. Digital Input Enable/Disable—contact closure enables

economizer.

2. Outdoor Temperature—when the outdoor temperature

is less than OaEconEnTemp, then the outdoor air is

suitable to au

g

ment coolin

g

.

3. Outdoor Enthalpy, Type A—when the outdoor

enthalp

y

meets the H205 t

y

pe A re

q

uirements, the

outdoor air is suitable to au

g

ment coolin

g

.

4. Outdoor Enthalpy, Type B—when the outdoor

enthalp

y

meets the H205 t

y

pe B re

q

uirements, the

outdoor air is suitable to au

g

ment coolin

g

.

5. Outdoor Enthalpy, Type C—when the outdoor

enthalp

y

meets the H205 t

y

pe C re

q

uirements, the

outdoor air is suitable to au

g

ment coolin

g

.

6. Outdoor Enthalpy, Type D—when the outdoor

enthalp

y

meets the H205 t

y

pe D re

q

uirements, the

outdoor air is suitable to au

g

ment coolin

g

.

7. Differential Temperature—the difference between

outdoor temperature and return air temperature is

compared to DiffEconEnTemp to determine whether

outdoor air or return air is more suitable for use to

au

g

ment mechanical coolin

g

.

8. Single Calculated Enthalpy—the calculated outdoor

enthalp

y

in btu/lb is compared to the enthalp

y

setpoint

(

OaEnthEn

)

in btu/lb, and the outdoor temperature is

compared to the outdoor temperature limit setpoint

(

OaEconEnTemp

)

for a hi

g

h limit. The compared

difference determines whether outdoor air is suitable for

use to au

g

ment mechanical coolin

g

.

9. Differential Enthalpy, Either Sensed or Calculated—

the difference between outdoor enthalp

y

and return air

enthalp

y

determines whether outdoor air or return air is

more suitable to au

g

ment mechanical coolin

g

. When

enthalp

y

sensors are confi

g

ured, the

y

are used for

comparin

g

enthalp

y

. If no enthalp

y

sensors are

available, then enthalp

y

is calculated usin

g

outdoor and

return air humidit

y

and temperature sensors. The

switchin

g

differential is fixed at 1.0 mA for enthalp

y

sensors, and 0.25 btu/lb for calculated enthalp

y

.

NOTE: If no return temperature sensor is confi

g

ured,

space temperature is used to calculate return

air enthalp

y

.

10. Network Enabled—the network input

DestEconEnable

controls the enablin

g

and disablin

g

of the economizer.

When usin

g

the network input, select Econo Enable

T

y

pe:

No Economizer

in E-Vision. The network input

has priorit

y

over the other nine economizer control

selections.

Appendix C. Complete List of Excel 10

W7750 Controller User Addresses.

See Table 18 for W7750 Controller User Address table

numbers and point t

y

pes.

The

User Address Index

followin

g

Table 18 lists the User

Addresses alphabeticall

y

and

g

ives the pa

g

e number where

the Address is located in each Table Number/Point T

y

pe.

After Table 18 there is an alphabetical list of

Mappable User

Addresses and Table Numbers

. Followin

g

this is an

alphabetical list of

Failure Detect User Addresses and Table

Numbers

.

Table 18. Excel 10 W7750 Controller User

Address Point Types.

Table Number Point Types

Table 20 Input/Output

Table 21 Control Parameters

Table 22 Ener

gy

Mana

g

ement Points

Table 23 Status Points

Table 24 Calibration Points

Table 25 Confi

g

uration Parameters

Table 26 LONMARK/Open S

y

stem Points

Table 27 Direct Access and Special Manual Points

Table 28 Data Share Points

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

63 74-2958—1

User Address Indexes (all in alphabetical order)

Table 20. Input Output Points.

Address Page

CO2Sensr 71

CORMode 67

DaTempSensr 70

EconEnSw 72

FltrPressSensr 70

FltrPressSensr 70

Ia

q

OvrSw 72

Model 72

ModelSw 73

MonitorSensr 71

MonitorSw 73

OaEnthSensr 70

OaHumSensr 70

OaTempSensr 70

OccSensr 72

OvrdSw 72

RaEnthSensr 70

RaHumSensr 70

RaTempSensr 70

RmTempSensr 70

RmtStptPot 70

SmokeMonSw 72

StatusAirFlow 72

StatusDO1 71

StatusDO2 71

StatusDO3 71

StatusDO4 71

StatusDO5 71

StatusDO6 71

StatusDO7 71

StatusDO8 71

StatusDI1 71

StatusDI2 71

StatusDI3 72

StatusDI4 72

TimeClkSw 72

WindowSw 73

Table 21. Control Parameters.

Address Page

B

y

pTime 76

DaTempClCtrlBd 77

DaTempEcCtrlBd 77

DaTempHiLim 73

DaTempHtCtrlBd 77

DaTempLoLim 73

DiffEconEnTemp 75

DlcBumpTemp 73

EconIAQPos 76

EconMinPos 76

FltrPressStPt 76

GainCoolDer 77

GainCoolInt 77

GainCoolProp 77

GainHeatDer 77

GainHeatInt 77

GainHeatProp 77

IAQSetpt 76

MaxClRamp 75

MinClRamp 75

MaxHtRamp 74

MinHtRamp 74

OaEconEnTemp 75

OaEnthEn 76

OaTempClLkOut 74

OaTempHtLkOut 73

OaTempMaxClRp 75

OaTempMinClRp 75

OaTempMaxHtRp 74

OaTempMinHtRp 74

PwmFullScale 76

PwmPeriod 76

PwmZeroScale 76

StptKnobHiLim 76

StptKnobLowLim 76

Table 22. Energy Management Points.

Address Page

DestB

y

pass 78

DestDlcShed 78

DestFree1 79

DestFree2 79

DestTimeClk 80

DestWSHPEnable 79

DestSchedOcc 78

SrcB

y

pCt 78

SrcB

y

pass 78

SrcTimeClk 80

SrcTimeClkCt 80

TodEventNext 78

Tuncos 78

Table 23. Status Points.

Address Page

AlarmLo

g

1 83

B

y

pTimer 88

CO2Sens 89

CoolPos 90

CoolSt

g

sOn 86

DaSetpt 89

DaTemp 89

DlcShed 86

EconPos 90

FilterPress 89

Free1Stat 86

Free2Stat 86

HeatPos 90

HeatSt

g

sOn 86

MonitorSens 90

MonitorSw 87

NetConfi

g

93

OaEnth 89

OaEnthCalc 85

OaHum 89

OaTemp 89

OccStatOut 86

RaEnth 89

RaEnthCalc 85

RaHum 89

RaTemp 89

RmTemp 88

RmTempActSpt 88

SaFan 86

SaFanStatus 85

ShutDown 87

SrcEmer

g

81

SrcTimeClk 80

StatFreezeStat 87

StatusAlmT

y

p 81

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

74-2958—164

StatusEconEn 85

StatusEconOut 86

StatusError 90

StatusFilter 87

StatusIa

q

Ovr 87

StatusManOcc 85

StatusMode 84

StatusOcc 84

StatusOc

y

Sen 85

StatusOvrd 84

StatusSched 84

StatusSmoke 87

StatusWndw 87

TimeClckOcc 84

WSHPEnable 88

Table 24. Calibration Points.

Page 93

Table 25. Configuration Parameters.

Address Page

CascCntrl 96

CoolC

y

cHr 94

CoolMtrSpd 95

DisMinClTime 96

DisMinHtTime 96

EconMode 94

EconMtrSpd 95

FanFailTime 95

FanMode 94

FanOnHtMode 95

FanRunOnCool 94

FanRunOnHeat 94

HeatC

y

cHr 94

HeatMtrSpd 95

Ia

q

UseHeat 96

OvrdPriorit

y

97

OvrdT

y

pe 97

RmTempCal 95

SetPtKnob 97

SmkCtlMode 94

TempOffstCal1 95

TempOffstCal2 95

UseRaTempCtl 96

UseWallModStpt 97

VoltOffstCal1 95

VoltOffstCal2 95

Table 26. LONMARK/Open System Points.

Address Page

CoolOccSpt 98

CoolUnoccSpt 98

CoolStb

y

Spt 98

DestEconEnable 104

DestEmer

g

Cmd 101

DestHvacMode 99

DestManOcc 99

DestOaHum 100

DestOaTemp 100

DestOccSensor 103

DestRmTemp 100

DestRmTempSpt 99

DestSptOffset 99

DestWndw 104

HeatOccSpt 98

HeatStb

y

Spt 98

HeatUnoccSpt 98

SrcEconEnable 105

SrcEconEnCt 105

SrcOaHum 100

SrcOaTemp 100

SrcOccSensor 103

SrcRmTemp 100

SrcRmTempActSpt 99

SrcUnitStatus 101

SrcWndw 104

SrcWndwCt 104

Table 27. Direct Access and Special Manual Points.

Address Page

DestManMode 106

TestAuxEcon 107

TestAuxHt1 107

TestAuxHt2 107

TestAuxHt3 107

TestAuxHt4 107

TestEconPos 106

TestFree1 107

TestFree2 107

TestHCPos 106

TestHtClMode 107

TestHtClSt

g

1 107

TestHtClSt

g

2 107

TestHtClSt

g

3 107

TestHtClSt

g

4 107

TestMode 106

TestOccStat 107

TestSaFan 107

Table 28. Data Share Points.

Address Page

DestIa

q

Ovrd 108

DestOaEnth 108

SrcIa

q

Ovr 108

SrcIa

q

OvrCt 108

SrcMonSw 108

SrcMonSwCt 108

SrcOaEnth 108

Mappable User Addresses and Table Number

User Address Table Number

B

y

pTime 21

B

y

pTimer 23

CascCntrl 25

CO2Sen 23

CoolC

y

cHr 25

CoolMtrSpd 25

CoolOccSpt 26

CoolPos 23

CoolStb

y

Spt 26

CoolSt

g

sOn 23

CoolUnoccSpt 26

DaSetpt 23

DaTemp 23

DaTempClCtrlBd 21

DaTempEcCtrlBd 21

DaTempHiLim 21

DaTempHtCtrlBd 21

DaTempLoLim 21

DestDlcShed 22

DestEmer

g

Cmd 26

DestHvacMode 26

DestManMode 27

DestSchedOcc 22

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

65 74-2958—1

DiffEconEnTemp 21

DisMinHtTime 25

DisMinClTime 25

DlcBumpTemp 21

EconIAQPos 21

EconMinPos 21

EconMtrSpd 25

EconPos 23

EconMode 25

FanFailTime 25

FanMode 25

FanOnHtMode 25

FanRunOnCool 25

FanRunOnHeat 25

FilterPress 23

FltrPressStPt 21

Free1Stat 23

Free2Stat 23

GainCoolDer 21

GainCoolInt 21

GainCoolProp 21

GainHeatDer 21

GainHeatInt 21

GainHeatProp 21

HeatC

y

cHr 25

HeatMtrSpd 25

HeatOccSpt 26

HeatPos 23

HeatStb

y

Spt 26

HeatSt

g

sOn 23

HeatUnoccSpt 26

IAQSetpt 21

Ia

q

UseHeat 25

MaxClRamp 21

MinClRamp 21

MaxHtRamp 21

MinHtRamp 21

MonitorSens 23

MonitorSw 23

OaEconEnTemp 21

OaEnth 23

OaEnthCalc 23

OaEnthEn 21

OaHum 23

OaTemp 23

OaTempClLkOut 21

OaTempHtLkOut 21

OaTempMaxClRp 21

OaTempMinClRp 21

OaTempMaxHtRp 21

OaTempMinHtRp 21

OccStatOut 23

OvrdPriorit

y

25

OvrdT

y

pe 25

PwmFullScale 21

PwmPeriod 21

PwmZeroScale 21

RaEnth 23

RaEnthCalc 23

RaHum 23

RaTemp 23

RmTempActSpt 23

RmTempCal 25

RmtStptPot 20

SaFan 23

SaFanStatus 23

SetPtKnob 25

ShutDown 23

SmkCtlMode 25

StatFreezeStat 23

StatusAlmT

y

p 23

StatusEconEn 23

StatusEconOut 23

StatusFilter 23

StatusIa

q

Ovr 23

StatusManOcc 23

StatusMode 23

StatusOcc 23

StatusOc

y

Sen 23

StatusOvrd 23

StatusSched 23

StatusSmoke 23

StatusWndw 23

StptKnobHiLim 21

StptKnobLowLim 21

TimeClckOcc 23

UseRaTempCtl 25

UseWallModStpt 25

WSHPEnable 23

Failure Detect User Addresses and Table Number

User Address Table Number

DestB

y

pass 22

DestDlcShed 22

DestEconEnable 26

DestFree1 22

DestFree2 22

DestHvacMode 26

DestIa

q

Ovrd 28

DestOaEnth 28

DestOaHum 26

DestOaTemp 26

DestOccSensor 26

DestRmTemp 26

DestSchedOcc 22

DestSptOffset 26

DestTimeClk 22

DestWndw 26

DestWSHPEnable 22

Table 19 lists the applicable En

g

ineerin

g

Units for the analo

g

points found in the W7750.

Table 19. Engineering Units For Analog Points.

English Units (Inch-Pound) Standard International Units (SI)

Measured Item Description Abbreviation Description Abbreviation

Temperature De

g

rees Fahrenheit F De

g

rees Celsius C

Relative Temperature Delta De

g

rees Fahrenheit DDF De

g

rees Kelvin K

Relative Humidity Percent % Percent %

Air Flow Cubic Feet per Minute CFM Meters Cubed per Hour m3h

CO2 Concentration Parts Per Million PPM Parts Per Million PPM

Enthalpy British Thermal Units per Pound of Air btu/lb kiloJoules/kilo

g

ram k

j

/k

g

Differential Pressure Inches of Water Column inw kiloPascal kPa

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

74-2958—166

All of the NvName values that are stored in EEPROM memor

y

have a prefix of

nci

.

NOTE: These parameters are stored in EEPROM and are

limited to 10,000

writes

. Do NOT use them as

outputs from Control Strate

g

ies,Time Pro

g

rams, or

Switchin

g

Tables. If these points are chan

g

ed more

than 10,000 times, irreversible hardware failure

results

Tables 20 throu

g

h 28 provide point attributes as follows:

En

g

ineerin

g

Units—This field indicates the point valid ran

g

e and

displa

y

ed En

g

ineerin

g

Unit. For di

g

ital points,

the valid states and the correspondin

g

enumerated values are shown.

Default—The value or state of the point on controller

start-up.

E-Vision

(

M

)

Monitor—These points are viewable within the E-Vision

Controller Monitorin

g

on-line screen.

(

P

)

Parameter—These points refer to control parameters

settable in the Application Selection dialo

g

boxes in E-Vision.

(

S

)

Schematic—These points appear in E-Vision monitor

mode

g

raphics.

Shareable—These points can be set up for data sharin

g

in

Command Multiple Points, Read Multiple

Points, or Refer Excel 10 Points as either a

data source or a destination.

Mappable—These points can be converted into a C-Bus

point used b

y

C-Bus devices. A mappable point

has a one-to-one relationship with a C-Bus

User Address.

Direct

Access—These points are accessible throu

g

h the

Subs

y

stem Points mechanism in XBS.

Hardware

Confi

g

.—These are points that involve controller I/O

confi

g

uration. An

y

chan

g

e to Hardware Confi

g

.

points causes the W7750 to perform an

application reset; therefore, these points can

onl

y

be modified off-line.

Manual

Confi

g

.—These points are used to set the controller

outputs when in manual mode. The W7750 is

placed in manual mode throu

g

h a menu

selection in the E-Vision Controller Monitor

screen.

Test—These points can be controlled in E-Visions test

mode that is used for field checkout/ debu

g

in

g

.

Failure Detect

Input Point—These points need an update periodicall

y

or a

communication alarm is

g

enerated. The failure

detect mechanism is onl

y

active when the NV is

bound

(

bindin

g

s are confi

g

ured usin

g

Refer

Excel 10 points

)

. The time between the updates

is user settable.

Non-Failure Detect

Input Point—These points

(

which are NVs that are bound or

unbound

)

do not check for an update

periodicall

y

and do not

g

enerate an alarm.

NOTES: 1. Mapped points can be viewed and chan

g

ed,

if

needed

, on the XI581, XI582 and XI584 C-Bus

devices and on an XBS central and on E-Vision.

2. All Excel 10 points, mappable and calibration,

confi

g

uration and internal data sharin

g

points, can

be viewed and chan

g

ed,

as allowed

, via Direct

Access

(

DA

)

mode in the XBS subs

y

stem menu

or via XI584.

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

67 74-2958—1

Table 20. Input/Output Points.

User Address NvName Field Name Engineering Units: English

(Metric) or States plus Range

Digital State or

Value of State

Default

E-Vision (M, P, S)

Share

Map

Direct Access

Hardware Config.

Manual Config.

Test

E-Vision Legend: (M) Monitor, (P) Parameter, (S) Schematic

Comments

CORMode nciIoSelect CorOnMode COR_ON_HEAT

COR_ON_COOL 0

1COR_ON_COOL P X CorOnMode specifies the mode when the Change Over Relay (COR) is

energized.

nciIoSelect ResistiveIn[0] DISCHARGE_TEMP_PT3000

OUTDOOR_TEMP_PT3000

RETURN_TEMP_PT3000

DISCHARGE_TEMP_20KNTC

RETURN_TEMP_20KNTC

UNUSED_RAI

0

1

2

3

4

255

UNUSED_RAI X ResistiveIn[0] specifies which logical sensor is assigned to each physical

analog input sensor channel according to the enumerated list that is shown

in the Engineering Units/States column. ResistiveIn[0] is the only input

available in the W7750A controller.

nciIoSelect ResistiveIn[1] DISCHARGE_TEMP_PT3000

OUTDOOR_TEMP_PT3000

RETURN_TEMP_PT3000

DISCHARGE_TEMP_20KNTC

RETURN_TEMP_20KNTC

UNUSED_RAI

0

1

2

3

4

255

UNUSED_RAI X ResistiveIn[1] specifies which logical sensor is assigned to each physical

analog input sensor channel according to the enumerated list that is shown

in the Engineering Units/States column. ResistiveIn[0] is the only input

available in the W7750A controller.

nciIoSelect VoltageIn[0] RTN_HUM_C7600C

RETURN_ENTHALPY

OD_HUM_C7600C

OUTDOOR_ENTHALPY

FILTER_STATIC_PRESS_DIFF

SPACE_CO2

MONITOR_SENSOR1

RTN_HUM_C7600B

OD_HUM_C7600B

UNUSED_VAI

0

1

2

3

4

5

6

7

8

255

UNUSED_VAI X VoltageIn[0] specifies which logical sensor is assigned to each physical

analog input sensor channel according to the enumerated list that is shown

in the Engineering Units/States column. (Voltage inputs are not available in

the W7750A controller.)

nciIoSelect VoltageIn[1] RTN_HUM_C7600C

RETURN_ENTHALPY

OD_HUM_C7600C

OUTDOOR_ENTHALPY

FILTER_STATIC_PRESS_DIFF

SPACE_CO2

MONITOR_SENSOR1

RTN_HUM_C7600B

OD_HUM_C7600B

UNUSED_VAI

0

1

2

3

4

5

6

7

8

255

UNUSED_VAI X VoltageIn[1] specifies which logical sensor is assigned to each physical

analog input sensor channel according to the enumerated list that is shown

in the Engineering Units/States column. (Voltage inputs are not available in

the W7750A controller.)

nciIoSelect DigitalIn[0] OCC_SENSOR

OCC_TIME_CLOCK

PROOF_AIR_FLOW

ECON_ENABLE

IAQ_OVERRIDE

SMOKE_MONITOR

DIRTY_FILTER

SHUT_DOWN

WINDOW_OPEN

MONITOR

SCHED_MASTER

UNUSED_DI

2

3

4

5

6

7

8

9

10

11

12

255

OCC_TIME_CLOCK_IN X DigitalIn[0] specifies which logical switch type is connected to the flexible

digital input switch channel according to the enumerated list that is shown in

the Engineering Units/States column. DigitalIn[0] and DigitalIn[1] are the

only inputs available in the W7750A controller. The controller is configured

at the factory with this user address configured to OCC_TIME_CLOCK_IN.

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

74-2958—168

nciIoSelect DigitalIn[1] OCC_SENSOR

OCC_TIME_CLOCK

PROOF_AIR_FLOW

ECON_ENABLE

IAQ_OVERRIDE

SMOKE_MONITOR

DIRTY_FILTER

SHUT_DOWN

WINDOW_OPEN

MONITORS

CHED_MASTER

UNUSED_DI

2

3

4

5

6

7

8

9

10

11

12

255

SHCED_MASTER_IN X DigitalIn[1] specifies which logical switch type is connected to the flexible

digital input switch channel according to the enumerated list that is shown in

the Engineering Units/States column. DigitalIn[0] and DigitalIn[1] are the

only inputs available in the W7750A controller. The controller is configured

at the factory with this user address configured to SCHED_MASTER_IN.

nciIoSelect DigitalIn[2] OCC_SENSOR

OCC_TIME_CLOCK

PROOF_AIR_FLOW

ECON_ENABLE

IAQ_OVERRIDE

SMOKE_MONITOR

DIRTY_FILTER

SHUT_DOWN

WINDOW_OPEN

MONITOR

SCHED_MASTER

UNUSED_DI

2

3

4

5

6

7

8

9

10

11

12

255

UNUSED_DI X DigitalIn[2] specifies which logical switch type is connected to the flexible

digital input switch channel according to the enumerated list that is shown in

the Engineering Units/States column. DigitalIn[0] and DigitalIn[1] are the

only inputs available in the W7750A controller.

Table 20. Input/Output Points. (Continued)

User Address NvName Field Name Engineering Units: English

(Metric) or States plus Range

Digital State or

Value of State

Default

E-Vision (M, P, S)

Share

Map

Direct Access

Hardware Config.

Manual Config.

Test

E-Vision Legend: (M) Monitor, (P) Parameter, (S) Schematic

Comments

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

69 74-2958—1

nciIoSelect DigitalOut[0] COOL_STAGE_1

COOL_STAGE_2

COOL_STAGE_3

COOL_STAGE_4

HEAT_STAGE_1

HEAT_STAGE_2

HEAT_STAGE_3

HEAT_STAGE_4

CHANGE_OVER_RELAY

FAN_OUT

AUX_ECON

OCCUPANCY_STATUS

ECON_OPEN

ECON_CLOSE

COOL_OPEN

COOL_CLOSE

HEAT_OPEN

HEAT_CLOSE

HEAT_COOL_STAGE_1

HEAT_COOL_STAGE_2

HEAT_COOL_STAGE_3

HEAT_COOL_STAGE_4

FREE1

FREE2

FREE1_PULSE_ON

FREE1_PULSE_OFF

ECON_PWM

HEAT_PWM

COOL_PWM

UNUSED

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

25

26

27

28

29

30

31

255

NETWORK DO(FREE1)

(Value of State is 25) X DigitalOut[0] specifies which logical digital output function is assigned to the

digital physical output according to the enumerated list that is shown in the

Engineering Units/States column. The W7750 Controllers are configured at

the factory with the enumerated value in the Default column. Only

DigitalOut[0] through DigitalOut[5] are available in the W7750A model

which can configure staged outputs. The W7750A Controller can drive

Series 60 Floating Control to modulate cooling valves, heating valves and

economizers. (No PWM outputs are allowed in the W7750A model.) The

controller is configured at the factory with the enumerated value in the

Default column. The eight outputs on the W7750B are all digital outputs.

The eight outputs on the W7750C consist of five digital and three analog

outputs.

nciIoSelect DigitalOut[1] See DigitalOut[0] enumerated

values 1-31

,255 FAN_OUT

(Value of State is 10) X See DigitalOut[0] for enumerated names. The W7750 Controllers are

configured at the factory with the enumerated value in the Default column.

nciIoSelect DigitalOut[2] See DigitalOut[0] enumerated

values 1-31

,255 COOL_STAGE_2

(Value of State is 2) X See DigitalOut[0] for enumerated names. The W7750 Controllers are

configured at the factory with the enumerated value in the Default column.

nciIoSelect DigitalOut[3] See DigitalOut[0] enumerated

values 1-31

,255 HEAT_STAGE_1

(Value of State is 1) X See DigitalOut[0] for enumerated names. The W7750 Controllers are

configured at the factory with the enumerated value in the Default column.

nciIoSelect DigitalOut[4] See DigitalOut[0] enumerated

values 1-31

,255 HEAT_STAGE_2

(Value of State is 3) X See DigitalOut[0] for enumerated names. The W7750 Controllers are

configured at the factory with the enumerated value in the Default column.

nciIoSelect DigitalOut[5] See DigitalOut[0] enumerated

values 1-31

,255 HEAT_STAGE_1

(Value of State is 5) X See DigitalOut[0] for enumerated names. The W7750 Controllers are

configured at the factory with the enumerated value in the Default column.

nciIoSelect DigitalOut[6] See DigitalOut[0] enumerated

values 1-31

,255 UNUSED

(Value of State is 255) X See DigitalOut[0] for enumerated names. The W7750 Controllers are

configured at the factory with the enumerated value in the Default column.

nciIoSelect DigitalOut[7] See DigitalOut[0] enumerated

values 1-31

,255 UNUSED

(Value of State is 255) X See DigitalOut[0] for enumerated names. The W7750 Controllers are

configured at the factory with the enumerated value in the Default column.

nciIoSelect HtPump CONV

HP 0

1CONV P X HtPump specifies the type of equipment being controlled. When HtPump is

0 (CONV), the node is controlling conventional gas or electric heat. When

HtPump is 1 (HP), the node is controlling a heat pump.

Table 20. Input/Output Points. (Continued)

User Address NvName Field Name Engineering Units: English

(Metric) or States plus Range

Digital State or

Value of State

Default

E-Vision (M, P, S)

Share

Map

Direct Access

Hardware Config.

Manual Config.

Test

E-Vision Legend: (M) Monitor, (P) Parameter, (S) Schematic

Comments

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

74-2958—170

nciIoSelect FiftySixtyHz SIXTYFIFTY 01 SIXTY P X FiftySixtyHz specifies the frequency of the main power input for the

controller. Correctly selecting the FiftySixtyHz decreases the noise picked

up by analog switch wiring from the power mains. When FiftySixtyHz is 0

(SIXTY is the default), the mains frequency is sixty Hz and when

FiftySixtyHz is 1 (FIFTY), the mains frequency is fifty Hz.

nciIoSelect SpaceSensorType T7770 0 T7770 X SpaceSensorType specifies the type of space temperature sensor

connected to the node. When SpaceSensorType is 0, a T7770 sensor is

connected to the sensor terminals. No other options are currently valid.

RmtStptPot nvoIO siSetPointTempS7 Degrees F

-9 to 85

Degrees C

(-23 to 29)

SI_INVALID M,

SX X X SetPointTemp is the wall module setpoint temperature. When

nciConfig.SetPointTemp is ABSOLUTE_COOL or ABSOLUTE_MIDDLE,

the reported value is the absolute setpoint temperature. When

Config.SetPntKnob is OFFSET, the reported value is the offset (from the

current active TempSetPts) temperature. If the input is not configured or

has failed, the value is SI_INVALID.

RmTempSensr nvoIO siSpaceTempS7 Degrees F

40 to 100

Degrees C

(4 to 38)

SI_INVALID M,

SSpaceTemp is the measured space temperature. If the sensor is not

configured or has failed, the value is SI_INVALID.NOTE: The reported

temperatures includes the offset correction provided by

Config.ResistiveOffsetCal.

DaTempSensr nvoIO siDischargeTempS7 Degrees F Degrees C

30 to 122 (-1 to 50) SI_INVALID DischargeTemp is the measured discharge air temperature. If the sensor is

not configured or has failed, the value is SI_INVALID. Refer to the note on

SpaceTemp.

RaTempSensr nvoIO siReturnTempS7 Degrees F Degrees C

30 to 122 (-1 to 50) SI_INVALID ReturnTemp is the measured return air temperature. If the sensor is not

configured or has failed, the value is SI_INVALID. Refer to the note on

SpaceTemp.

RaHumSensr nvoIO ReturnHumidity Percentage

10 to 90 SI_INVALID ReturnHumidity is the measured return air humidity. If the sensor is not

configured or has failed, the value is UB_INVALID.NOTE: The reported

temperatures includes the offset correction provided by

Config.VoltageOffsetCal.

RaEnthSensr nvoIO siReturnEnthalpyS7 mA

4 to 20 SI_INVALID ReturnEnthalpy is the measured return air enthalpy. If the sensor is not

configured or has failed, the value is SI_INVALID. Since the C7400 reports

comfort due to enthalpy (btu/lb) in milliamps, enthalpy is also reported in

milliamps. Refer to the NOTE on ReturnHumidity.

OaTempSensr nvoIO siOutdoorTempS7 Degrees F Degrees C

-40 to 122 (-40 to 50) SI_INVALID M,

SOutdoorTemp is the measured outdoor air temperature. If the sensor is not

configured or has failed, the value is SI_INVALID. Refer to the NOTE on

ReturnHumidity.

OaHumSensr nvoIO OutdoorHumidity Percentage

10 to 90 SI_INVALID M,

SOutdoorHumidity is the measured outdoor air humidity. If the sensor is not

configured or has failed, the value is UB_INVALID. Refer to the NOTE on

ReturnHumidity.

OaEnthSensr nvoIO siOutdoorEnthalpyS7 mA

4 to 20 SI_INVALID M,

SOutdoorEnthalpy is the measured outdoor air enthalpy. If the sensor is not

configured or has failed, the value is SI_INVALID. Since the C7400 reports

comfort due to enthalpy (btu/lb) in milliamps, enthalpy is also reported in

milliamps. Refer to the NOTE on ReturnHumidity.

FltrPressSensr nvoIO siFilterPressureS10 inw (kPa)

0 to 5 (0 to 1.25) SI_INVALID FilterPressure is the measured differential pressure across the return air

filter. If the sensor is not configured or has failed, the value is the

SI_INVALID. Refer to the NOTE on ReturnHumidity.

Table 20. Input/Output Points. (Continued)

User Address NvName Field Name Engineering Units: English

(Metric) or States plus Range

Digital State or

Value of State

Default

E-Vision (M, P, S)

Share

Map

Direct Access

Hardware Config.

Manual Config.

Test

E-Vision Legend: (M) Monitor, (P) Parameter, (S) Schematic

Comments

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

71 74-2958—1

CO2Sensr nvoIO siSpaceCo2S0 PPM

150 to 2000 SI_INVALID SpaceCo2 is the measured CO2 in the conditioned air space. If the sensor

is not configured or has failed, the value is SI_INVALID. Refer to the NOTE

on ReturnHumidity.

MonitorSensr nvoIO siMonitorS10 volts

1 to 10 SI_INVALID Monitor is the voltage applied at the monitor inputs terminals. If the sensor

is not configured or has failed, the value is SI_INVALID. Refer to the NOTE

on ReturnHumidity.

StatusDO1 nvoIO ubOut

Byte Offset = 24

Bit Offset =

0(DigitalOut1)

FALSE

TRUE 0

1FALSE DigitalOut1 is a byte with a bit for every physical digital output. On is a 1

(TRUE) and off is a 0 (FALSE).

StatusDO2 nvoIO ubOut

Byte Offset = 24

Bit Offset =

1(DigitalOut2)

FALSE

TRUE 0

1FALSE DigitalOut2 is a byte with a bit for every physical digital output. On is a 1

(TRUE) and off is a 0 (FALSE).

StatusDO3 nvoIO ubOut

Byte Offset = 24

Bit Offset =

2(DigitalOut3)

FALSE

TRUE 0

1FALSE DigitalOut3 is a byte with a bit for every physical digital output. On is a 1

(TRUE) and off is a 0 (FALSE).

StatusDO4 nvoIO ubOut

Byte Offset = 24

Bit Offset =

3(DigitalOut4)

FALSE

TRUE 0

1FALSE DigitalOut4 is a byte with a bit for every physical digital output. On is a 1

(TRUE) and off is a 0 (FALSE).

StatusDO5 nvoIO ubOut

Byte Offset = 24

Bit Offset =

4(DigitalOut5)

FALSE

TRUE 0

1FALSE DigitalOut5 is a byte with a bit for every physical digital output. On is a 1

(TRUE) and off is a 0 (FALSE).

StatusDO6 nvoIO ubOut

Byte Offset = 24

Bit Offset =

5(DigitalOut6)

FALSE

TRUE 0

1FALSE DigitalOut6 is a byte with a bit for every physical digital output. On is a 1

(TRUE) and off is a 0 (FALSE).

StatusDO7 nvoIO ubOut

Byte Offset = 24

Bit Offset =

6(DigitalOut7)

FALSE

TRUE 0

1FALSE DigitalOut7 is a byte with a bit for every physical digital output. On is a 1

(TRUE) and off is a 0 (FALSE).

StatusDO8 nvoIO ubOut

Byte Offset = 24

Bit Offset =

7(DigitalOut8)

FALSE

TRUE 0

1FALSE DigitalOut8 is a byte with a bit for every physical digital output. On is a 1

(TRUE) and off is a 0 (FALSE).

StatusDI1 nvoIO ubDigitalIn

Byte Offset = 25

Bit Offset =

7(DigitalIn1)

FALSE

TRUE 0

1FALSE DigitalIn1 is a byte with a bit for every physical digital input. If the input is

shorted to ground, the bit is a zero or FALSE. If the input is open, the bit is

one or TRUE.

StatusDI2 nvoIO ubDigitalIn

Byte Offset = 25

Bit Offset =

6(DigitalIn2)

FALSE

TRUE 0

1FALSE DigitalIn2 is a byte with a bit for every physical digital input. If the input is

shorted to ground, the bit is a zero or FALSE. If the input is open, the bit is

one or TRUE.

Table 20. Input/Output Points. (Continued)

User Address NvName Field Name Engineering Units: English

(Metric) or States plus Range

Digital State or

Value of State

Default

E-Vision (M, P, S)

Share

Map

Direct Access

Hardware Config.

Manual Config.

Test

E-Vision Legend: (M) Monitor, (P) Parameter, (S) Schematic

Comments

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

74-2958—172

StatusDI3 nvoIO ubDigitalIn

Byte Offset = 25

Bit Offset =

5(DigitalIn3)

FALSE

TRUE 0

1FALSE DigitalIn3 is a byte with a bit for every physical digital input. If the input is

shorted to ground, the bit is a zero or FALSE. If the input is open, the bit is

one or TRUE.

StatusDI4 nvoIO ubDigitalIn

Byte Offset = 25

Bit Offset =

4(DigitalIn4)

FALSE

TRUE 0

1FALSE DigitalIn4 is a byte with a bit for every physical digital input. If the input is

shorted to ground, the bit is a zero or FALSE. If the input is open, the bit is

one or TRUE.

Model nvoIO ubDigitalIn

Byte Offset = 25

Bit Offset = 3

(ExtenedModelIn)

FALSE

TRUE 0

1FALSE X ExtenedModelIn is a byte with a bit for every physical digital input. If the

input is shorted to ground, the bit is a zero or FALSE. If the input is open,

the bit is one or TRUE.

OvrdSw nvoIO OverRide FALSE

TRUE 0

1FALSE OverRide indicates the status of the wall module override pushbutton. It is 1

(TRUE) if the button is pressed, and is 0 (FALSE) if it isn't pressed.

OccSensr nvoIO OccupancySensor FALSE

TRUE 0

1FALSE M,

SOccupancySensor is the state of the digital input configured and wired to

the local occupancy sensor. 1 means that occupancy is being sensed (input

circuit shorted) and 0 means that no occupancy is being sensed (input

circuit open).

TimeClkSw nvoIO OccTimeClock FALSE

TRUE 0

1FALSE M,

SOccTimeClock is the state of the digital input configured and wired to a time

clock. 1 (input shorted) means that the scheduled occupancy is

OC_OCCUPIED, and 0 (input open circuited) means that the scheduled

occupancy is OC_UNOCCUPIED.

StatusAirFlow nvoIO ProofAirFlow FALSE

TRUE 0

1FALSE ProofAirFlow is the state of the digital input configured and wired to the

proof of air flow switch. 1 (input shorted) means that air flow is detected and

0 (input open circuited) means that air flow is not detected.

EconEnSw nvoIO EconEnableIn FALSE

TRUE 0

1FALSE M,

SEconEnableIn is the state of the digital input configured and wired to the

outdoor air sensor that determines the suitably of outdoor air for free

cooling. 1 (input shorted) means that the outdoor air is suitable for cooling,

and 0 (input open) means that the outdoor air in not suitable for cooling.

IaqOvrSw nvoIO IaqOverRide FALSE

TRUE 0

1FALSE M,

SIaqOverRide is the state of the digital input configured and wired to the

indoor air quality sensor. 1 (input shorted) means that the indoor air quality

is poor, and 0 (input open) means that the indoor air quality is acceptable.

This input is used to cause the economizer to open to a predetermined

position when poor indoor air quality is detected.

SmokeMonSw nvoIO SmokeMonitor FALSE

TRUE 0

1FALSE M,

SSmokeMonitor is the state of the digital input configured and wired to the

indoor smoke sensor. 1 (input shorted) means that smoke is detected, and

0 (input open) means that no smoke is detected.

DrtyFilterSw nvoIO DirtyFilter FALSE

TRUE 0

1FALSE M,

SDirtyFilter is the state of the digital input configured and wired to the dirty

filter sensor. 1 (input shorted) means that filter is dirty, and 0 (input open)

means that the filter is not dirty.

ShutDownSw nvoIO ShutDown FALSE

TRUE 0

1FALSE ShutDown is the state of the digital input configured and wired to the shut

down switch. 1 (input shorted) means that equipment should be shut down,

and 0 (input open) means that the equipment should be running.

Table 20. Input/Output Points. (Continued)

User Address NvName Field Name Engineering Units: English

(Metric) or States plus Range

Digital State or

Value of State

Default

E-Vision (M, P, S)

Share

Map

Direct Access

Hardware Config.

Manual Config.

Test

E-Vision Legend: (M) Monitor, (P) Parameter, (S) Schematic

Comments

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

73 74-2958—1

WindowSw nvoIO WindowOpen FALSE

TRUE 0

1FALSE M,

SWindowOpen is the state of the digital input configured and wired to a

window open sensor switch. 1 (input open circuit) means that the window is

open, and 0 (input shorted) means that the window is closed.

MonitorSw nvoIO MonSwitch FALSE

TRUE 0

1FALSE MonSwitch is the state of the digital input configured and wired to a general

purpose monitor switch. 1 (input shorted) means that switch is closed, and

0 (input open) means that the switch is open.

ModelSw nvoIO Model FALSE

TRUE 0

1FALSE X Model indicates the Model of the node. One of the digital inputs is

connected to a printed wiring board trace to let the embedded software

know what kind of hardware is present. If Model is 1 (input held high), the

hardware is the W7750B Model. If Model is 0 (input shorted to ground), the

hardware is the W7750A Model.

nvoIO SchedMaster FALSE

TRUE 0

1FALSE M X If ScheduleMaster is 1 (input shorted), the node is the schedule master and

the locally connected time clock will be sent via TimeClk to other nodes on

the network. If ScheduleMaster is 0, (input open), the node is not a

schedule master and nvoTimeClk will not be sent on the network even if the

time clock input is configured. If the ScheduleMaster input is not configured

by Select, TimeClk reports the state of the locally connected time clock.

Table 20. Input/Output Points. (Continued)

User Address NvName Field Name Engineering Units: English

(Metric) or States plus Range

Digital State or

Value of State

Default

E-Vision (M, P, S)

Share

Map

Direct Access

Hardware Config.

Manual Config.

Test

E-Vision Legend: (M) Monitor, (P) Parameter, (S) Schematic

Comments

Table 21. Control Parameters.

User Address NvName Field Name Engineering Units: English

(Metric) or States plus Range

Digital State or

Value of State

Default

E-Vision (M, P, S)

Share

Map

Direct Access

Hardware Config.

Manual Config.

Test

E-Vision Legend: (M) Monitor, (P) Parameter, (S) Schematic

Comments

DaTempLoLim nciAux1SetPt siLowLimitDischAirTempS7 Degrees F

0 to 60

Degrees C

(-1 to 16)

45 P X X When the discharge air temperature falls below

LowLimitDischAirTemp, the outdoor air dampers are closed to a

position that corrects the low temperature problem. If mechanical

cooling is active when the discharge air falls below

LowLimitDischAirTemp, the mechanical cooling cycles off after the

minimum run times are obeyed to allow the dampers to return open

and provide free cooling.

DaTempHiLim nciAux1SetPt siMaxDisAirTempHeatS7 Degrees F Degrees C

65 to 135 (18 to 57) 100 P X X When the mode is HEAT, and the CascadeControl is enabled, the

discharge air temperature is controlled to a value not to exceed

MaxDisAirTempHeat.

DlcBumpTemp nciAux1SetPt siDlcBumpTempS7 Degrees F Degrees C

0 to +10 (-18 to -12) 3 P X X When DlcShed is not 0 then the setpoint is shifted by DlcBumpTemp

in the energy saving direction. When DlcShed changes from 1 to 0,

the setpoint shift ramps back to 0 over a 30 minute interval.

OaTempHtLkOut nciAux1SetPt ubOdHtLockOutTempS0 Degrees F Degrees C

0 to 90 (-18 to 32) 70 P X X When the outdoor air temperature is greater than

OdHtLockOutTemp, the heating is disabled.

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

74-2958—174

MaxHtRamp nciAux1SetPt ubMaxHtRampS0 Degrees F/Hr

0 to 20

Degrees C/Hr

(0 to 11)

8 P X X MaxHtRamp is the maximum heat recovery ramp rate in degrees F

per hour. This value is used to control the adaptive recovery ramp

rate during the HEAT recovery period. The setpoint is changed at a

rate in degrees F per hour depending on the outdoor air temperature

and the MinHtRamp, OdTempMaxHtRamp, and OaTempMinHtRamp

parameters. If there is no outdoor air temperature sensor available,

then ubMinHtRamp is used as the recovery rate.NOTE: Recovery

ramping applies between scheduled heating or cooling setpoint

changes from OC_UNOCCUPIED to OC_STANDBY,

OC_UNOCCUPIED to OC_OCCUPIED, and OC_STANDBY to

OC_OCCUPIED. Scheduled setpoint changes from OC_OCCUPIED

to OC_UNOCCUPIED or OC_OCCUPIED to OC_STANDBY do not

use a ramped setpoint but instead use a step change in setpoint.

Recovery ramps begin before the next scheduled occupancy time

and are ramped from the setpoint for the existing scheduled

occupancy state to the setpoint for the next occupancy state.

MinHtRamp nciAux1SetPt ubMinHtRampS0 Degrees F/Hr

0 to 20

Degrees C/Hr

(0 to 11)

3 P X X MinHtRamp is the minimum heat recovery ramp rate in degrees F

per hour. This value is used to control the adaptive recovery ramp

rate during the HEAT recovery period. The setpoint is changed at a

rate in degrees F per hour depending on the outdoor air temperature

and the MaxHtRamp, OdTempMaxHtRamp, and

OdTempMinHtRamp parameters. If there is no outdoor air

temperature sensor available, then MinHtRamp is used as the

recovery rate. Refer to the NOTE in the comments column for

MaxHtRamp for the conditions that recovery ramping applies to.

OaTempMaxHtRp nciAux1SetPt ubOdTempMaxHtRampS0 Degrees F

0 to 100

Degrees C

(-18 to 38)

40 P X X OdTempMaxHtRamp is the maximum outdoor air temperature

parameter that is used to calculate the heat recovery ramp rate

setpoint. This value is used to control the adaptive recovery ramp

rate during the HEAT recovery period. The setpoint is changed at a

rate in degrees F per hour depending on the outdoor air temperature

and the MaxHtRamp, MinHtRamp, and OdTempMinHtRamp

parameters. If there is no outdoor air temperature sensor available,

then MinHtRamp is used as the recovery rate. Refer to the NOTE in

the comments column for MaxHtRamp for what conditions that

recovery ramping applies to.

OaTempMinHtRp nciAux1SetPt ubOdTempMinHtRampS0 Degrees F

0 to 100

Degrees C

(-18 to 38)

0 P X X OdTempMinHtRamp is the minimum outdoor air temperature

parameter that is used to calculate the heat recovery ramp rate

setpoint. This value is used to control the adaptive recovery ramp

rate during the HEAT recovery period. The setpoint is changed at a

rate in degrees F per hour depending on the outdoor air temperature

and the MaxHtRamp, MinHtRamp, and OdTempMaxHtRamp

parameters. If there is no outdoor air temperature sensor available,

then MinHtRamp is used as the recovery rate. Refer to the NOTE in

the comments column for MaxHtRamp for what conditions that

recovery ramping applies to.

OaTempClLkOut nciAux1SetPt ubOdClLockOutTempS0 Degrees F Degrees C

0 to 90 (-18 to 32) 50 P X X When the outdoor air temperature is less than OdClLockOutTemp,

the cooling is disabled.

Table 21. Control Parameters. (Continued)

User Address NvName Field Name Engineering Units: English

(Metric) or States plus Range

Digital State or

Value of State

Default

E-Vision (M, P, S)

Share

Map

Direct Access

Hardware Config.

Manual Config.

Test

E-Vision Legend: (M) Monitor, (P) Parameter, (S) Schematic

Comments

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

75 74-2958—1

MaxClRamp nciAux1SetPt ubMaxClRampS0 Degrees F/Hr

0 to 20

Degrees C/Hr

(0 to 11)

6 P X X MaxClRamp is the maximum cool recovery ramp rate in degrees F

per hour. This value is used to control the adaptive recovery ramp

rate during the COOL recovery period. The setpoint is changed at a

rate in degrees F per hour depending on the outdoor air temperature

and the MinClRamp, OdTempMaxClRamp, and OdTempMinClRamp

parameters. If there is no outdoor air temperature sensor available,

then MinClRamp is used as the recovery rate. Refer to the NOTE in

the comments column for MaxHtRamp for the conditions that

recovery ramping applies to.

MinClRamp nciAux1SetPt ubMinClRampS0 Degrees F/Hr

0 to 20

Degrees C/Hr

(0 to 11)

2 P X X MinClRamp is the minimum cool recovery ramp rate in degrees F

per hour. This value is used to control the adaptive recovery ramp

rate during the COOL recovery period. The setpoint is changed at a

rate in degrees F per hour depending on the outdoor air temperature

and the MaxClRamp, OdTempMaxClRamp, and

OdTempMinClRamp parameters. If there is no outdoor air

temperature sensor available, then MinClRamp is used as the

recovery rate. Refer to the NOTE in the comments column for

MaxHtRamp for the conditions that recovery ramping applies to.

OaTempMaxClRp nciAux1SetPt ubOdTempMaxClRampS0 Degrees F

0 to 100

Degrees C

(-18 to 38)

70 P X X OdTempMaxClRamp is the maximum outdoor air temperature

parameter that is used to calculate the cool recovery ramp rate

setpoint. This value is used to control the adaptive recovery ramp

rate during the COOL recovery period. The setpoint is changed at a

rate in degrees F per hour depending on the outdoor air temperature

and the MaxClRamp, MinClRamp, and OdTempMinClRamp

parameters. If there is no outdoor air temperature sensor available,

then MinClRamp is used as the recovery rate. Refer to the NOTE in

the comments column for MaxHtRamp for the conditions that

recovery ramping applies to.

OaTempMinClRp nciAux1SetPt ubOdTempMinClRampS0 Degrees F

0 to 100

Degrees C

(-18 to 38)

90 P X X OdTempMinClRamp is the minimum outdoor air temperature

parameter that is used to calculate the cool recovery ramp rate

setpoint. This value is used to control the adaptive recovery ramp

rate during the COOL recovery period. The setpoint is changed at a

rate in degrees F per hour depending on the outdoor air temperature

and the MaxClRamp, MinClRamp, and OdTempMaxClRamp

parameters. If there is no outdoor air temperature sensor available,

then MinClRamp is used as the recovery rate. Refer to the NOTE in

the comments column for MaxHtRamp for the conditions that

recovery ramping applies to.

OaEconEnTemp nciAux1SetPt ubOdEconEnableTempS0 Degrees F

0 to 90

Degrees C

(-18 to 32)

70 P X X If Config.EconEnable is OD_TEMP, and the outdoor temperature is

less than OdEconEnableTemp, then outdoor air is judged suitable to

augment mechanical cooling. If Config.EconEnable is

SINGLE_ENTH and outdoor temperate is less than

ubOdEconEnableTemp (high limit), then outdoor air may be judged

suitable to augment mechanical cooling depending on the

relationship between calculated outdoor enthalpy and

OdEnthalpyEnable.

DiffEconEnTemp nciAux1SetPt ubDiffEconEnableTempS0 Degrees F Degrees C

0 to 90 (-18 to 32) 4 P X X If Config.EconEnable is DIFF_TEMP, and return air temperature

minus outdoor air temperature is greater than DiffEconEnableTemp,

then outdoor air is judged suitable to augment mechanical cooling.

Table 21. Control Parameters. (Continued)

User Address NvName Field Name Engineering Units: English

(Metric) or States plus Range

Digital State or

Value of State

Default

E-Vision (M, P, S)

Share

Map

Direct Access

Hardware Config.

Manual Config.

Test

E-Vision Legend: (M) Monitor, (P) Parameter, (S) Schematic

Comments

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

74-2958—176

OaEnthEn nciAux1SetPt ubOdEnthalpyEnableS2 btu/lb

0 to 65 25 P X X If Config.EconEnable is SINGLE_ENTH, and calculated outdoor

enthalpy is less than OdEnthalpyEnable, and outdoor temperature is

less than OdEconEnableTemp, then outdoor air is judged suitable to

augment mechanical cooling.

EconMinPos nciAux1SetPt ubEconMinPosS0 Percentage

0 to 100 0 P X X The minimum allowed position of the economizer damper for HEAT

and COOL is EconMinPos.

EconIAQPos nciAux1SetPt ubEconIaqPosS0 Percentage

0 to 100 80 P X X The control overrides the economizer damper to EconIaqPos when

poor indoor air quality is detected.

IAQSetpt nciAux1SetPt siCO2IaqLimitS0 PPM

0 to 2000 800 P X X When an analog CO2 sensor is configured and the sensed CO2 is

greater than CO2IaqLimit, then poor indoor air quality is detected

and Data1.OverRide is set to 1. When the sensed CO2 is less than

CO2IaqLimit, then the indoor air quality is considered acceptable

and Data1.IaqOverRide is set to 0. oData1.IaqOverRide is used to

set the economizer damper to Aux1SetPt. EconIaqPos and to

possibly turn on the heat according to the state of

Config.IaqUseHeat.

PwmPeriod nciAux1SetPt siPwmPeriodS4 100 P X X When pulse width modulation is used, the period of one pulse width

modulation cycle is PwmPeriod seconds. The smallest resolution is

0.1 seconds.

PwmZeroScale nciAux1SetPt siPwm0pcntS4 Seconds

0 to 2047 1 P X X When pulse width modulation is used, the period of a pulse for zero

percent output (damper or valve at open position) is Pwm0pcntS4

seconds. The smallest resolution is 0.1 seconds.

PwmFullScale nciAux1SetPt siPwm100pcntS4 Seconds

0 to 2047 99 P X X When pulse width modulation is used, the period of a pulse for full

scale output (damper or valve at open position) is Pwm100pcnt

seconds. The smallest resolution is 0.1 seconds.

BypTime nciAux2SetPt uiBypassTime minutes

0 to 1080 180 P X X uiBypassTime is the time between the pressing of the override

button at the wall module (or initiating OC_BYPASS via ManOcc)

and the return to the original occupancy state. When the bypass

state has been activated, the bypass timer is set to BypassTime.

FltrPressStPt nciAux2SetPt ubFilterPressStPtS5 inw (kPa)

0 to 5 (0 to 1.25) 0.5 P X X If a filter pressure sensor is configured by IoSelect and the filter

pressure reported in Data1 FilterPressure exceeds FilterPressStPt,

then a DIRTY_FILTER alarm is generated and Data1.DirtyFilter is

set to 1.

StptKnobLowLim nciAux2SetPt siLowStPtS7 Degrees F

-9 to 90

Degrees C

(-23 to 32)

55 P X X LowStPt is the lowest value reported for the setpoint knob.

Dependent on the configuration of the setpoint knob (see

Config.SetPntKnob) this setting is either absolute [degree

Fahrenheit (50 to 90)] in case of absolute setpoint knob configuration

or relative [delta degree Fahrenheit (-9 to +9)] in case of relative

setpoint knob configuration.

StptKnobHiLim nciAux2SetPt siHighStPtS7 Degrees F

-9 to 90

Degrees C

(-23 to 32)

85 P X X HighStPt is the highest value reported for the setpoint knob.

Dependent on the configuration of the setpoint knob (see

Config.SetPntKnob) this setting is either absolute [degree

Fahrenheit (50 to 90)] in case of absolute setpoint knob configuration

or relative [delta degree Fahrenheit (-9 to +9)] in case of relative

setpoint knob configuration.

Table 21. Control Parameters. (Continued)

User Address NvName Field Name Engineering Units: English

(Metric) or States plus Range

Digital State or

Value of State

Default

E-Vision (M, P, S)

Share

Map

Direct Access

Hardware Config.

Manual Config.

Test

E-Vision Legend: (M) Monitor, (P) Parameter, (S) Schematic

Comments

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

77 74-2958—1

GainCoolProp nciAux2SetPt ubKpCoolS2 Degrees F Degrees C

2 to 30 (1 to 30) 5 P X X This is the throttling range for the proportional portion of the PID loop

gain for the cooling control loop.

GainHeatProp nciAux2SetPt ubKpHeatS2 Degrees F Degrees C

2 to 30 (1 to 17) 5 P X X This is the throttling range for the proportional portion of the PID loop

gain for the heating control loop.

GainCoolInt nciAux2SetPt siKiCoolS0 Seconds

0 to 5000 2050 P X X This is the integral portion of the PID loop gain for the cooling control

loop.

GainHeatInt nciAux2SetPt siKiHeatS0 Seconds

0 to 5000 2050 P X X This is the integral portion of the PID loop gain for the heating control

loop.

GainCoolDer nciAux2SetPt siKdCoolS0 Seconds

0 to 9000 0 P X X This is the derivative portion of the PID loop gain for the cooling

control loop.

GainHeatDer nciAux2SetPt siKdHeatS0 Seconds

0 to 9000 0 P X X This is the derivative portion of the PID loop gain for the heating

control loop.

DaTempClCtrlBd nciAux2SetPt ubDisCbCoolS0 Degrees F Degrees C

5 to 30 (3 to 17) 10 P X X DisCbCool is the throttling range used for the cooling portion of the

discharge air temperature cascade control loop.

DaTempHtCtrlBd nciAux2SetPt ubDisCbHeatS0 Degrees F Degrees C

5 to 30 (3 to 17) 10 P X X DisCbHeat is the throttling range used for the heating portion of the

discharge air temperature cascade control loop.

DaTempEcCtrlBd nciAux2SetPt ubDisCbEconS0 Degrees F Degrees C

5 to 30 (3 to 17 10 P X X DisCbEcon is the throttling range used for the economizer control

loop.

Table 21. Control Parameters. (Continued)

User Address NvName Field Name Engineering Units: English

(Metric) or States plus Range

Digital State or

Value of State

Default

E-Vision (M, P, S)

Share

Map

Direct Access

Hardware Config.

Manual Config.

Test

E-Vision Legend: (M) Monitor, (P) Parameter, (S) Schematic

Comments

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

74-2958—178

Table 22. Energy Management Points.

User Address NvName Field Name Engineering Units: English

(Metric) or States plus Range

Digital State or

Value of State

Default

E-Vision (M, P, S)

Share

Map

Direct Access

Hardware Config.

Manual Config.

Failure Detect

E-Vision Legend: (M) Monitor, (P) Parameter, (S) Schematic

Comments

DestDlcShed nviDlcShed 0 to 1 0 M X X X X X DlcShed is an input from an energy management system. When DlcShed is

0, the temperature control algorithm operates in a normal mode. When

DlcShed is non-zero, the setpoint is shifted by Aux1SetPt.DlcBumpTemp in

the energy saving direction.

DestSchedOcc nviTodEvent CurrentState OC_OCCUPIED

OC_UNOCCUPIED

OC_BYPASS

OC_STANDBY

OC_NUL

0

1

2

3

255

OC_OCCUPIED M X X X X X CurrentState indicates the current scheduled occupancy state to the node.

CurrentState is used along with other occupancy inputs to calculate the

effective occupancy of the node. The valid states and meaning are as

follows: OC_OCCUPIED means the energy management system is

specifying occupied. OC_UNOCCUPIED means the energy management

system is specifying that the space is presently unoccupied. OC_BYPASS

states that the energy management system is in bypass. OC_STANDBY

states that the energy management system has the space presently is

between occupied and unoccupied. OC_NUL states that no occupancy

state has been specified.

TodEventNext nviTodEvent NextState OC_OCCUPIED

OC_UNOCCUPIED

OC_BYPASS

OC_STANDBY

OC_NUL

0

1

2

3

255

OC_OCCUPIED M X X NextState indicates the next scheduled occupancy state to the node. This

information is required by the Excel 10 to perform the optimum start

strategy. The space expected effective occupancy will be NextState in

uiTimeToNextState minutes. The valid states and meaning are the same as

for CurrentState.

Tuncos nviTodEvent uiTimeToNextState minutes

0 to 2880 0 M X X TimeToNextState is the time in minutes until the next change of scheduled

occupancy state.

nviBypass value 0 to 100 0 Bypass.value:The bypass state of one node may be shared with the bypass

state of another node using nviBypass and nvoBypass. This allows a wall

module at one node to be used to over ride the scheduled occupancy of

another node. The node with Bypass bound normally does not have a wall

module. See the Data1.EffectOcc and Data1.OverRide for more details.

The valid states are as follows: If the state is SW_ON and the value is not

zero then the node should bypass the time of day schedule (subject to

occupancy arbitration logic). If the state is SW_NUL, the input is not

available because it is not bound, the input is no longer being updated by

the sender, or OC_BYPASS is no longer being called. This means that the

same as SW_OFF. If the state is SW_OFF or other and the value is don’t

care, the node should not bypass the time of day schedule. If the state is

SW_ON and the value is 0, then the node should not bypass the time of day

schedule. If the node receives this combination of state and value, then

state is set to SW_OFF.

DestBypass nviBypass state SW_OFF

SW_ON

SW_NUL

0

1

255

SW_NUL M X X X X Refer to nviBypass.value.

SrcBypCt nvoBypass value 0 to 100 0 nvoBypass.value:nvoBypass is the current occupancy state of the node for

bypass schedule. The states have the following meanings: If the state is

SW_OFF and the value is 0, then Data1.EffectOcc is not OC_BYPASS. If

the state is SW_ON and the value is 100 percent, then Data1.EffectOcc is

OC_BYPASS.

SrcBypass nvoBypass state SW_OFF

SW_ON

SW_NUL

0

1

255

SW_NUL M X X Refer to nvoBypass.value.

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

79 74-2958—1

nviFree1 value 0 to 100 0 Free1.value network variable controls the spare or Free digital output for

auxiliary functions. nviFree1 controls the FREE1_OUT,

FREE1_OUT_PULSE_ON, and FREE1_OUT_PULSE_OFF outputs (only

one of these DO selections per controller is allowed). The states have the

following meaning: If the state is SW_OFF, the corresponding free logical

output (and therefore the physical output, if configured) is off. If the state is

SW_ON and the value is 0, then the corresponding free logical output (and

therefore the physical output, if configured) is off. If the node receives this

combination of state and value, then state is set to SW_OFF. If the state is

SW_ON and the value is not zero, then the corresponding free logical

output (and therefore the physical output, if configured) is on. If the state is

SW_NUL or other, then the network variable is not bound, the

communications path from the sending node has failed, or the sending node

has failed. The corresponding free logical output does not change if the

network variable input fails.

DestFree1 nviFree1 state SW_OFF

SW_ON

SW_NUL

0

1

255

SW_NUL M X X X X Refer to Free1.value.

nviFree2 value 0 to 100 0 Free2.value behaves the same as Free 1 value.

DestFree2 nviFree2 state SW_OFF

SW_ON

SW_NUL

0

1

255

SW_NUL M X X X X Refer to Free2.value.

nviWSHPEnable value 0 to 100 0 WSHPEnable.value is used to enable the compressor stages in heat pump

applications. Typically nviWSHPEnable is bound to a water flow sensor that

detects heating/cooling water supplied to the heat pump. If there is no water

flowing the compressor is disabled. If the state is SW_OFF, the compressor

is disabled in heat pump applications. If the state is SW_ON and the value

is 0, the compressor is disabled in heat pump applications. If the node

receives this combination of state and value, then state is set to SW_OFF. If

the state is SW_ON and the value is not zero, the compressor is enabled in

heat pump applications. If the state is SW_NUL or other, the network

variable is not bound and is ignored.

DestWSHPEnable nviWSHPEnable state SW_OFF

SW_ON

SW_NUL

0

1

255

SW_NUL X Refer to WSHPEnable.value.

Table 22. Energy Management Points. (Continued)

User Address NvName Field Name Engineering Units: English

(Metric) or States plus Range

Digital State or

Value of State

Default

E-Vision (M, P, S)

Share

Map

Direct Access

Hardware Config.

Manual Config.

Failure Detect

E-Vision Legend: (M) Monitor, (P) Parameter, (S) Schematic

Comments

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

74-2958—180

nviTimeClk value 0 to 100 0 nviTimeClk.value:nviTimeClk allows a time clock at one node to be shared

with other nodes over the network. nviTimeClk is ORed with the local time

clock sensor and the results are placed in Data1.OccTimeClock. TimeClk is

received from another node and may have the following values: If the state

is SW_OFF, the space is scheduled to be unoccupied. If the state is

SW_ON and the value is 0, the space is scheduled to be unoccupied. If the

node receives this combination of state and value, then state is set to

SW_OFF. If the state is SW_ON and the value is not zero, the space is

scheduled to be occupied. If the state is SW_NUL or other and the value is

don’t care, the network variable is not bound and is ignored.

DestTimeClk nviTimeClk state SW_OFF

SW_ON

SW_NUL

0

1

255

SW_NUL X Refer to nviTimeClk.value.

SrcTimeClkCt nvoTimeClk value 0 to 100 0 nvoTimeClk reports the current state of the physical time clock input. The

output values have the following meanings: If the state is SW_OFF and the

value is 0, the time clock input is configured and the input is open circuit. If

SCHEDULE_MASTER_IN is configured, then the schedule master input

must be shorted to ground to reach this state. If the state is SW_ON and the

value is 100 precent, the time clock input is configured and the input is a

closed circuit. If SCHEDULE_MASTER_IN is configured, then the schedule

master input must be shorted to ground to reach this state. If the state is

SW_NUL and the value is 0, the time clock input is not configured by Select

or the SCHEDULE_MASTER_IN physical input is configured and the input

is open (nvoIO.ScheduleMaster = 0).

SrcTimeClk nvoTimeClk state SW_OFF

SW_ON

SW_NUL

0

1

255

SW_NUL Refer to nvoTimeClk.value.

Table 22. Energy Management Points. (Continued)

User Address NvName Field Name Engineering Units: English

(Metric) or States plus Range

Digital State or

Value of State

Default

E-Vision (M, P, S)

Share

Map

Direct Access

Hardware Config.

Manual Config.

Failure Detect

E-Vision Legend: (M) Monitor, (P) Parameter, (S) Schematic

Comments

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

81 74-2958—1

Table 23. Status Points.

User Address NvName Field Name Engineering Units: English

(Metric) or States plus Range

Digital State or

Value of State

Default

E-Vision (M, P, S)

Share

Map

Direct Access

Hardware Config.

Manual Config.

Test

E-Vision Legend: (M) Monitor, (P) Parameter, (S) Schematic

Comments

nroPgmVer id[ RTU1 R

O

M

A four byte ASCII string indicating the type of node (model).

nroPgmVer major_ver 1 R

O

M

Software version.

nroPgmVer minor_ver 0 R

O

M

Software version.

nroPgmVer bug_ver 0 R

O

M

Software version.

nroPgmVer node_type 1 R

O

M

The NodeType is a numeric identifier that is stored in EPROM that identifies

the Excel 10 node type. Whenever a new software version or upgrade is

issued, this is reflected in nroPgmVer which typically is read by a network

management node to identify the node type. The contents of nroPgmVer

contain compatible model type information and is fixed at the time when the

node software is compiled.

SrcEmerg nvoEmerg EMERG_NORMAL

EMERG_PRESSURIZE

EMERG_DEPRESSURIZE

EMERG_PURGE

EMERG_SHUTDOWN

EMERG_NUL

0

1

2

3

4

255

EMERG_NORMAL M X X Emerg is an emergency output reflecting the state of the locally wired

smoke detector. If Emerg is EMERG_NORMAL, then no smoke is being

detected by the local sensor or that the smoke detector input is not

configured. If Emerg is EMERG_PURGE, the locally wired smoke sensor is

indicating a smoke condition.EMERG_PRESSURIZE,

EMERG_DEPRESSURIZE, and EMERG_SHUTDOWN are not supported

by Emerg. If Emerg is not configured then it is set to EMERG_NUL

nvoAlarm subnet 1 to 255 0 subnet is the LONWORKS subnet number (in domain entry 1 of the nodes

domain table) to which the node is assigned.

nvoAlarm node 0 to 127 0 node is the LONWORKS node number (in domain entry 1 of the nodes

domain table) assigned to the node.

nvoAlarm type 0 to 255 0 type is the alarm type being issued. When an alarm condition is no longer

TRUE, type is set to the sum of the alarm conditions numeric value and the

RETURN_TO_NORMAL numeric value. The type also is recorded in

AlarmLog. When a new alarm is detected, just the corresponding numeric

value for the alarm is reported. Refer to Table 12 (Excel 10 Alarms) in the

System Engineering Guide for all the error conditions that may be reported.

StatusAlmTyp nvoAlarmStatus alarm_bit[0]

Byte Offset = 0

Bit Offset =

0(InputNVFailAlrm)

FALSE

TRUE 0

1FALSE X X alarm_bit[0]Byte Offset = 0Bit Offset = 0(InputNVFailAlrm)alarm_bit [n]

contains a bit for every possible alarm condition. Each alarm type has a

corresponding bit in alarm_bit[n] (Alarm.type: 1.24, without

RETURN_TO_NORMAL).

nvoAlarmStatus alarm_bit[0]

Byte Offset = 0

Bit Offset = 1

(NodeDisableAlrm)

FALSE

TRUE 0

1FALSE alarm_bit[0]

Byte Offset = 0

Bit Offset = 1

(NodeDisableAlrm)

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

74-2958—182

nvoAlarmStatus alarm_bit[0]

Byte Offset = 0

Bit Offset = 2

(SensorFailAlrm)

FALSE

TRUE 0

1FALSE alarm_bit[0]

Byte Offset = 0

Bit Offset = 2

(SensorFailAlrm)

nvoAlarmStatus alarm_bit[0]

Byte Offset = 0

Bit Offset = 3

(FrostProtectAlrm)

FALSE

TRUE 0

1FALSE alarm_bit[0]

Byte Offset = 0

Bit Offset = 3

(FrostProtectAlrm)

nvoAlarmStatus alarm_bit[0]

Byte Offset = 0

Bit Offset = 4

(InvalidSetPtAlrm)

FALSE

TRUE 0

1FALSE alarm_bit[0]

Byte Offset = 0

Bit Offset = 4

(InvalidSetPtAlrm)

nvoAlarmStatus alarm_bit[0]

Byte Offset = 0

Bit Offset = 5

(LossAirFlowAlrm)

FALSE

TRUE 0

1FALSE alarm_bit[0]

Byte Offset = 0

Bit Offset = 5

(LossAirFlowAlrm)

nvoAlarmStatus alarm_bit[0]

Byte Offset = 0

Bit Offset = 6

(DirtyFilterAlrm)

FALSE

TRUE 0

1FALSE alarm_bit[0]

Byte Offset = 0

Bit Offset = 6

(DirtyFilterAlrm)

nvoAlarmStatus alarm_bit[0]

Byte Offset = 0

Bit Offset = 7

(SmokeAlrm)

FALSE

TRUE 0

1FALSE alarm_bit[0]

Byte Offset = 0

Bit Offset = 7

(SmokeAlrm)

nvoAlarmStatus alarm_bit[1]

Byte Offset = 1

Bit Offset = 0

(IaqOverRideAlrm)

FALSE

TRUE 0

1FALSE alarm_bit[1]

Byte Offset = 1

Bit Offset = 0

(IaqOverRideAlrm)

Table 23. Status Points. (Continued)

User Address NvName Field Name Engineering Units: English

(Metric) or States plus Range

Digital State or

Value of State

Default

E-Vision (M, P, S)

Share

Map

Direct Access

Hardware Config.

Manual Config.

Test

E-Vision Legend: (M) Monitor, (P) Parameter, (S) Schematic

Comments

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

83 74-2958—1

AlarmLog1 nvoAlarmLog type[0]

0 to 255

(AlarmTypeLog0)

(AlarmTypeLog1)

(AlarmTypeLog2)

(AlarmTypeLog3)

(AlarmTypeLog4)

NO_ALARM

INPUT_NV_FAILURE

NODE_DISABLED

SENSOR_FAILURE

FROST_PROTECTION

INVALID_SET_POINT

LOSS_OF_AIR_FLOW

DIRTY_FILTER

SMOKE_ALARM

IAQ_OVERRIDE

LOW_LIM_ECON_CLOSE

rINPUT_NV_FAILURE

rNODE_DISABLED

rSENSOR_FAILURE

rFROST_PROTECTION

rINVALID_SET_POINT

rLOSS_OF_AIR_FLOW

rDIRTY_FILTER

rSMOKE_ALARM

rIAQ_OVERRIDE

rLOW_LIM_ECON_CLOSE

ALARM_NOTIFY_DISABLED

0

1

2

3

4

5

6

7

8

9

10

129

130

131

132

133

134

135

136

137

138

255

NO_ALARM X ype[0]

0 to 255

(AlarmTypeLog0)

(AlarmTypeLog1)

(AlarmTypeLog2)

(AlarmTypeLog3)

(AlarmTypeLog4)

A supervisory node may poll the AlarmLog output for a short alarm history.

The last five alarm reports sent via nvoAlarm are reported via AlarmLog.

When ALARM_NOTIFY_DISABLED is entered into the log, further alarms

or return to normals are not entered into the log, until alarm reporting is

again enabled. If Alarm is bound and not being acknowledged, the last

alarm report entered into AlarmLog is the one that was not

acknowledged.See Alarm and AlarmStatus for related subjects.type [n]

specifies the alarm that was issued via Alarm. See Alarm for the alarm

types used in AlarmLog. The newest alarm is reported in type[0] and the

oldest is reported in type[4]. When a new entry is made to the log, the

oldest entry is lost.

nvoData1

(nvoCtlDataG1) FieldNo UPDATE_ALL_FIELDS

MODE_FIELD

EFFECT_OCC_FIELD

OVERRIDE_FIELD

SCHED_OCC_FIELD

OCC_TIME_CLOCK_FIELD

NET_MAN_OCC_FIELD

SEN_OCC_FIELD

ECON_ENABLE_FIELD

PROOF_AIR_FLOW_FIELD

CALC_OD_ENTHALPY_FIELD

CALC_RA_ENTHALPY_FIELD

HEAT_STAGES_ON_FIELD

COOL_STAGES_ON_FIELD

FREE1_OUT_FIELD

FREE2_OUT_FIELD

OCC_STATUS_OUT_FIELD

FAN_ON_FIELD

AUX_ECON_OUT_FIELD

ECON_FLOAT_SYNCH_FIELD

DLC_SHED_FIELD

IAQ_OVERRIDE_FIELD

SMOKE_MONITOR_FIELD

WINDOW_OPEN_FIELD

DIRTY_FILTER_FIELD

SHUTDOWN_FIELD

MON_SWITCH_FIELD

WSHP_ENABLE_FIELD

UPDATE_NO_FIELDS

0

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

127

UPDATE_ALL_FIELDS FieldNo: nvoData1 and nvoCtlDataG1 are output network variables

indicating the node status. The information contained in these network

variables are typically used to display the node status on an operator

terminal, used in a trend log, or used in a control process. The information

contained in nvoCtlDataG1 and nvoData1 are identical. nvoCtlDataG1 uses

the SGPUC mechanism to update the status or values. The fields in

nvoData are updated when network variables are polled by the receiver.

Then every six seconds the difference between the field in nvoData and

nvoCtlDataG is calculated. If the difference is significant the field is updated

according to the SGPUC mechanism. FieldNo indicates which other data

field in the SGPUC network variable has changed since the last time it was

sent on the network according to the SGPUC mechanism. If FieldNo is

UPDATE_ALL_FIELDS, then all fields have been updated. If FieldNo is

UPDATE_NO_FIELDS, then no fields have been updated recently.

Table 23. Status Points. (Continued)

User Address NvName Field Name Engineering Units: English

(Metric) or States plus Range

Digital State or

Value of State

Default

E-Vision (M, P, S)

Share

Map

Direct Access

Hardware Config.

Manual Config.

Test

E-Vision Legend: (M) Monitor, (P) Parameter, (S) Schematic

Comments

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

74-2958—184

StatusMode nvoData1

(nvoCtlDataG1) Mode START_UP_WAIT

HEAT

COOL

OFF_MODE

DISABLED_MODE

EMERG_HEAT

SMOKE_EMERGENCY

FREEZE_PROTECT

MANUAL

FACTORY_TEST

FAN_ONLY

0

1

2

3

4

5

6

7

8

9

10

START_UP_WAIT X Mode: The result of the controller determining which mode of operation it

currently is in. At each power-up, the controller remains in the Start-Up and

Wait mode (a random time from 0 to 20 minutes that is based on the units

network number). After that period, the mode changes to initialize actuators

that will fully close the damper and valve actuators to insure full travel when

under program control. The various other modes are due to normal

operation as well as manual and network commands.

StatusOcc nvoData1

(nvoCtlDataG1) EffectOcc OC_OCCUPIED

OC_UNOCCUPIED

OC_BYPASS

OC_STANDBY

OC_NUL

0

1

2

3

255

OC_NUL X EffectOcc: Result of controller supervising the various Occupied controlling

inputs and deciding which one to use. See StatusinOcy, DestSchedOcc,

ManualOcc and StatusOvrd.

StatusOvrd nvoData1

(nvoCtlDataG1) Override OC_OCCUPIE

DOC_UNOCCUPIED

OC_BYPASS

OC_STANDBY

OC_NUL

0

1

2

3

255

OC_NUL X Override: Is the effective manual override state arbitrated from NetManOcc,

the wall module override button and the Bypass Timer.

StatusSched nvoData1

(nvoCtlDataG1) SchedOcc OC_OCCUPIED

OC_UNOCCUPIED

OC_BYPASS

OC_STANDBY

OC_NUL

0

1

2

3

255

OC_NUL X DestSchedOcc: DestSchedOcc is calculated from OccTimeClock and

nviTodEvent.CurrentState using the following logic: If

nviTodEvent.CurrentState is OC_OCCUPIED and OccTimeClock is

ST_NUL, then DestSchedOcc is OC_OCCUPIED. If

nviTodEvent.CurrentState is OC_UNOCCUPIED and OccTimeClock is

ST_NUL, then DestSchedOcc is OC_UNOCCUPIED. If

nviTodEvent.CurrentState is OC_STANDBY and OccTimeClock is

ST_NUL, then DestSchedOcc is OC_STANDBY. If

nviTodEvent.CurrentState is don’t care and OccTimeClock is ST_ON, then

DestSchedOcc is OC_OCCUPIED. If nviTodEvent.CurrentState is don’t

care and OccTimeClock is ST_OFF, then DestSchedOcc is

OC_UNOCCUPIED. OC_OCCUPIED means the space is scheduled to be

occupied. OC_UNOCCUPIED means the space is scheduled to be

unoccupied. OC_STANDBY means the space is scheduled to be in a

standby state somewhere between OC_OCCUPIED and

OC_UNOCCUPIED.

TimeClckOcc nvoData1

(nvoCtlDataG1) OccTimeClock ST_OFF

ST_LOW

ST_MED

ST_HIGH

ST_ON

ST_NUL

0

1

2

3

4

255

ST_NUL X OccTimeClock: OccTimeClock shows the state of the physical time clock

input via nvoIO.OccTimeClock ORed with nviTimeClk. Valid enumerated

values are: ST_OFF means OC_UNOCCUPIED when either the time clock

input is configured and nvoIO.OccTimeClock is 0 and nviTimeClk is not

SW_ON or nviTimeClk.state is SW_OFF and nvoIO.OccTImeClock is not 1.

ST_ON means OC_OCCUPIED when either the time clock input is

configured and nvoIO.OccTimeClock is 1 or nviTimeClk.state is SW_ON.

ST_NUL means that the local time clock input is not configured by

nciIoSelect and nviTimeClk.state is SW_NUL. There is no time clock

configured or bound to the node.

Table 23. Status Points. (Continued)

User Address NvName Field Name Engineering Units: English

(Metric) or States plus Range

Digital State or

Value of State

Default

E-Vision (M, P, S)

Share

Map

Direct Access

Hardware Config.

Manual Config.

Test

E-Vision Legend: (M) Monitor, (P) Parameter, (S) Schematic

Comments

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

85 74-2958—1

StatusManOcc nvoData1

(nvoCtlDataG1) NetManOcc OC_OCCUPIED

OC_UNOCCUPIED

OC_BYPASS

OC_STANDBY

OC_NUL

0

1

2

3

255

OC_NUL X NetManOcc: NetManOcc reports the network manual occupancy state from

nviManOcc. The valid enumerated states are: OC_OCCUPIED indicates

occupied OC_UNOCCUPIED indicates not occupied OC_BYPASS

indicates that the space is bypass occupied for

nciAux2SetPt.uiBypassTime seconds after nviManOcc is first set to

OC_BYPASS OC_STANDBY indicates that the space is standby. OC_NUL

means that no manual override is active.

StatusOcySen nvoData1

(nvoCtlDataG1) SenOcc OC_OCCUPIED

OC_UNOCCUPIED

OC_BYPASS

OC_STANDBY

OC_NUL

0

1

2

3

255

OC_NUL X SenOcc: SenOcc indicates the current state of the sensed occupancy and

is calculated from nviSensorOcc and the local occupancy sensor via

nvoIO.OccupancySensor. The local sensor and nviSensorOcc are ORed

together. If either the local sensor or nviSensorOcc shows occupancy, then

SenOcc shows occupancy. The valid enumerated values are:

OC_OCCUPIED means that occupancy is sensed by one or more

sensor.OC_UNOCCUPIED means that no occupancy is sensed by any

sensors.OC_NUL means no local sensor is configured and nviSensorOcc

has failed to be received periodically (bound or not bound).

StatusEconEn nvoData1

(nvoCtlDataG1) EconEnable ST_OFF

ST_LOW

ST_MED

ST_HIGH

ST_ON

ST_NUL

0

1

2

3

4

255

ST_NUL X EconEnable: EconEnable indicates the current suitability of outdoor air for

use in cooling used by the control process EconEnable is periodically

calculated either from the sensor(s) specified by nciConfig.EconEnable or

from nviEcon. When nviEcon.state is not SW_NUL, then the local inputs

are ignored and nviEcon.state is used instead. See nciConfig.EconEnable.

The valid enumerated values are: ST_OFF means the outdoor air is not

suitable to augment cooling. ST_ON means the outdoor air is suitable to

augment cooling.ST_NUL means no local sensor is selected by

nciConfig.EconEnable, or the selected local sensor has failed or has not

been configured by nciIoSelect, and that nviEcon.state is SW_NUL. The

outdoor air is considered unsuitable for cooling.

SaFanStatus nvoData1

(nvoCtlDataG1) ProofAirFlow ST_OFF

ST_LOW

ST_MED

ST_HIGH

ST_ON

ST_NUL

0

1

2

3

4

255

ST_NUL X ProofAirFlow: ProofAirFlow indicates the current state of the ProofAirFlow

switch used by the control process and is read by the local sensor via

nvoIO.ProofAirFlow. The valid enumerated values are: ST_OFF means air

flow is not detected. ST_ON means air flow is detected. ST_NUL means no

air flow switch is configured.

OaEnthCalc nvoData1

(nvoCtlDataG1) siCalcODEnthalpyS7 btu/lb

0 to 100 SI_INVALID X siCalcODEnthalpyS7: siCalcODEnthalpyS7 is the calculated outdoor air

enthalpy in btu / lb calculated from the siOutdoorTempS7 and

ubOutdoorHumidityS1. siCalcODEnthalpyS7 is used to determine the

suitability of outside air for cooling when nciConfig.EconEnable is

SINGLE_ENTH and both outdoor temperature and humidity sensors are

present. siCalcODEnthalpyS7 is compared to the enthalpy setpoint stored

in nciAux1SetPts.ubOdEnthalpyEnableS2.

RaEnthCalc nvoData1

(nvoCtlDataG1) siCalcRAEnthalpyS7 btu/lb

0 to 100 SI_INVALID X siCalcRAEnthalpyS7: siCalcRAEnthalpyS7 is the calculated return air

enthalpy in btu / lb calculated from the siReturnTempS7 and

ubReturnHumidityS1. siCalcRAEnthalpyS7 is used to determine the

suitability of outside air for cooling when nciConfig.EconEnable is

DIFF_ENTH and both outdoor and return (or space) temperature sensors

and humidity sensors are present. Sensors may be physically connected to

the node or available over the network.

Table 23. Status Points. (Continued)

User Address NvName Field Name Engineering Units: English

(Metric) or States plus Range

Digital State or

Value of State

Default

E-Vision (M, P, S)

Share

Map

Direct Access

Hardware Config.

Manual Config.

Test

E-Vision Legend: (M) Monitor, (P) Parameter, (S) Schematic

Comments

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

74-2958—186

HeatStgsOn nvoData1

(nvoCtlDataG1) HeatStagesOn 0 to 4 0 X HeatStagesOn: HeatStagesOn indicates how many heating stages are on.

If the node is controlling a heat pump, HeatStagesOn indicates how many

auxiliary heating stages are turned on.

CoolStgsOn nvoData1

(nvoCtlDataG1) CoolStagesOn 0 to 4 0 X CoolStagesOn: CoolStagesOn indicates how many compressor stages are

on. If the node is controlling a heat pump, compressor stages are turned on

for both heating or cooling.

Free1Stat nvoData1

(nvoCtlDataG1) Free1Out FALSE

TRUE 0

1FALSE X Free1Out: Free1Out indicates the state of FREE1_OUT digital output. 1

means on, and 0 means off.

Free2Stat nvoData1

(nvoCtlDataG1) Free2Out FALSE

TRUE 0

1FALSE X Free2Out: Free2Out indicates the state of FREE2_OUT digital output. 1

means on, and 0 means off.

OccStatOut nvoData1

(nvoCtlDataG1) OccStatusOut FALSE

TRUE 0

1FALSE X OccStatusOut: OccStatusOut indicates the state of the

OCCUPANCY_STATUS_OUT digital output. 1 means on (not

OC_UNOCCUPIED), and 0 means off (OC_UNOCCUPIED).

SaFan nvoData1

(nvoCtlDataG1) FanOn FALSE

TRUE 0

1FALSE X FanOn: FanOn indicates the state of the FAN_OUT digital output. 1 means

on, and 0 means off.

StatusEconOut nvoData1

(nvoCtlDataG1) AuxEconOut FALSE

TRUE 0

1FALSE X AuxEconOut: AuxEconOut indicates the state of the AUX_ECON_OUT

digital output. 1 means that the packaged economizer is enabled, and 0

means the economizer is disabled. A packaged economizer is always

treated as the first stage of cooling when an economizer is configured by

nciIoSelect.

nvoData1

(nvoCtlDataG1) EconFloatSynch FALSE

TRUE 0

1FALSE EconFloatSynch: EconFloatSynch indicates that the economizer damper

motor is being synchronized with the reported economizer position by

driving the damper for a period longer than it takes to fully close the

damper. The reported economizer position is synchronized whenever an

endpoint is reached (full open or full close).and when the elapsed time

since the last synchronization is 24 hours.

DlcShed nvoData1

(nvoCtlDataG1) DlcShed FALSE

TRUE 0

1FALSE DlcShed: DlcShed indicates the state of nviDlcShed. When DlcShed is 1,

demand limit control set by an energy management node is active. If the

effective occupancy is OC_OCCUPIED or OC_STANDBY when demand

limit control is active, then the setpoint is shifted by

nciAux1SetPt.siDlcBumpTempS7 in the energy saving direction. When

DlcShed is 0, demand limit control is inactive. If nviDlcShed fails to be

received periodically or nviDlcShed becomes 0, then the setpoint is ramped

back to the original setpoint over a 30 minute interval.

Table 23. Status Points. (Continued)

User Address NvName Field Name Engineering Units: English

(Metric) or States plus Range

Digital State or

Value of State

Default

E-Vision (M, P, S)

Share

Map

Direct Access

Hardware Config.

Manual Config.

Test

E-Vision Legend: (M) Monitor, (P) Parameter, (S) Schematic

Comments

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

87 74-2958—1

StatusIaqOvr nvoData1

(nvoCtlDataG1) IaqOverRide FALSE

TRUE 0

1FALSE X IaqOverRide: When an economizer is configured, IaqOverRide indicates

the current state of the indoor air quality, an is used by the control process

to open the economizer damper to let in more outside air. 1 means poor

indoor air quality, and 0 means indoor air quality is OK. When IaqOverRide

is 1, the IAQ_OVERRIDE alarm is initiated. IaqOverRide indicates poor air

quality if the analog sensor OR a digital sensor (local or via network) shows

poor air quality. Specifically, if nvoData2.siSpaceCo2S0 is not SI_INVALID,

and exceeds nciAux1SetPt.siCO2IaqLimitS0, then poor air quality is

detected. Also if nviIaqOvr.state is SW_ON, then poor air quality is

detected. Or if a local digital input is configured as IAQ_OVERRIDE_IN and

nvoIO.IaqOverRide is 1 then poor air quality is also detected. When poor air

quality is detected, the economizer minimum position is set to

nciAux1SetPts.ubEconIaqPosS0, instead of

nciAux1SetPts.ubEconMinPosS0.When an economizer is not configured,

IaqOverRide is 0.

StatusSmoke nvoData1

(nvoCtlDataG1) SmokeMonitor FALSE

TRUE 0

1FALSE X SmokeMonitor: SmokeMonitor indicates the current state of the

SmokeMonitor input used by the control process and is read from another

node via nviEmerg or the local sensor via nvoIO.SmokeMonitor. If either

nviEmerg is not EMERG_NORMAL or nvoIO.SmokeMonitor is 1, then

SmokeMonitor is 1 meaning that smoke is detected. Otherwise

SmokeMonitor is 0, meaning smoke is not detected. When smoke monitor

is 1, the algorithm controls as per the settings found in

nciConfig.SmokeControl.

StatusWndw nvoData1

(nvoCtlDataG1) WindowOpen FALSE

TRUE 0

1FALSE X WindowOpen: WindowOpen indicates the current state of the window

sensors and is calculated from nviWindow state and the local occupancy

sensor via nvoIO.WindowOpen. The local sensor and nviWindow are ORed

together. If either the local sensor or nviWindow shows that the window is

open (nvoIO.WindowOpen = 1 or nviWindow.state = SW_ON), then

WindowOpen shows that the window is open. 1 means that the window is

open and 0 means that the window is closed. When the window is open, the

controller mode is switched to FREEZE_PROTECT.

StatusFilter nvoData1

(nvoCtlDataG1) DirtyFilter FALSE

TRUE 0

1FALSE X DirtyFilter: DirtyFilter indicates the state of the air filter via the

nvoIO.DirtyFilter digital input or the nvoData1.siFilterPressureS10 analog

input. If nvoData1.siFilterPressureS10 exceeds

nciAux2SetPt.ubFilterPressStPtS5, a dirty filter is indicated. DirtyFilter is set

to 1 when a dirty filter has been detected by either method for one minute.

DirtyFilter is set to 0 when a dirty filter has not been detected by either

method for one minute. When DirtyFilter is 1, a DIRTY_FILTER alarm is

generated.

ShutDown nvoData1

(nvoCtlDataG1) ShutDown FALSE

TRUE 0

1FALSE X ShutDown: ShutDown indicates the state of the ShutDown input via

nvoIO.ShutDown. 1 means a ShutDown is being commanded and 0 means

normal operation.

StatFreezeStat nvoData1

(nvoCtlDataG1) CoilFreezeStat FALSE

TRUE 0

1FALSE M X X StatFreezeStat: StatFreezeStat gives the state of the cooling coil controlled

by the CVAHU. False (0) it is not freezing or True (1) it is freezing.

NOTE: Only use this User Address when using E-Vision.

MonitorSw nvoData1

(nvoCtlDataG1) MonSwitch FALSE

TRUE 0

1FALSE X MonSwitch: MonSwitch is the state of the digital input wired to a general

purpose monitor switch via nvoIO.MonSwitch. 1 means that the switch is

closed and 0 means that the switch is open.

Table 23. Status Points. (Continued)

User Address NvName Field Name Engineering Units: English

(Metric) or States plus Range

Digital State or

Value of State

Default

E-Vision (M, P, S)

Share

Map

Direct Access

Hardware Config.

Manual Config.

Test

E-Vision Legend: (M) Monitor, (P) Parameter, (S) Schematic

Comments

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

74-2958—188

WSHPEnable nvoData1

(nvoCtlDataG1) WSHPEnable FALSE

TRUE 0

1FALSE X WSHPEnable: WSHPEnable reports the state of the current state of

nviWSHPEnable. The states for nviWSHPEnable are as follows: If

nviWSHPEnable.state is SW_OFF and the nviWSHPEnable.value is 0,

then WSHPEnable is 0 (Disable Water Source Heat Pump). If

nviWSHPEnable.state is SW_ON and the nviWSHPEnable.value is 0, then

WSHPEnable is 0 (Disable Water Source Heat Pump). If

nviWSHPEnable.state is SW_ON and the nviWSHPEnable.value is not 0,

then WSHPEnable is 1 (Enable Water Source Heat Pump). If

nviWSHPEnable.state is SW_NUL and the nviWSHPEnable.value is any

value, then WSHPEnable is 1 (Enable Water Source Heat Pump when

nviWSHPEnable is not bound to another node).

nvoData2

(nvoCtlDataG2) FieldNo UPDATE_ALL_FIELDS

BYPASS_TIMER_FIELD

TEMP_CONTROL_PT_FIELD

SPACE_TEMP_FIELD

DISCHARGE_TEMP_FIELD

DISCHARGE_SET_PT_FIELD

RETURN_TEMP_FIELD

RETURN_HUMIDITY_FIELD

RETURN_ENTHALPY_FIELD

OUTDOOR_TEMP_FIELD

OUTDOOR_HUMIDITY_FIELD

OUTDOOR_ENTHALPY_FIELD

FILTER_PRESSURE_FIELD

SPACE_CO2_FIELD

MONITOR_VOLTS_FIELD

COOL_POS_FIELD

HEAT_POS_FIELD

ECON_POS_FIELD

UPDATE_NO_FIELDS

UPDATE_ALL_FIELDS nvoData2. FieldNo: nvoData2 and nvoCtlDataG2 are output network

variables indicating the node status. The information contained in these

network variables are typically used to display the node status on an

operator terminal, used in a trend log, or used in a control process. The

information contained in nvoCtlDataG2 and nvoData2 are identical.

nvoData2 is a polled network variable and must be polled by the receiver.

nvoCtlDataG2 uses the SGPUC mechanism. FieldNo indicates which other

data field in the SGPUC network variable has changed since the last time it

was sent on the network according to the SGPUC mechanism.

BypTimer nvoData2

(nvoCtlDataG2) uiBypassTimer minutes

0 to 2880 0 X uiBypassTimer: The time left in the bypass timer is uiBypassTimer minutes.

If uiBypassTimer is zero, then the bypass timer is not running. If

uiBypassTimer is not zero, it is decremented every minute.

RmTempActSpt nvoData2

(nvoCtlDataG2) siTempControlPtS7 Degrees F

50 to 85

Degrees C

(10 to 29)

SI_INVALID X siTempControlPtS7: The current temperature control point (such that, the

current actual space temperature setpoint which the controller is presently

trying to maintain in the conditioned space) is calculated from the various

Setpoints, operating modes, network variable inputs, and optimum start-up

parameters. The final result is stored in siTempControlPtS7.

RmTemp nvoData2

(nvoCtlDataG2) siSpaceTempS7 Degrees F

40 to 100

Degrees C

(4 to 38)

SI_INVALID siSpaceTempS7: siSpaceTempS7 is the space temperature used by the

control process and is read from another node via nviSpaceTemp or a local

sensor via nvoIO.siSpaceTempS7 or nvoIO.siReturnTempS7. If the network

input is not SI_INVALID, then the network input has priority. The local

sensor is selected by nciConfig.ControlUsesRtnAirTemp. When

nciConfig.ControlUsesRtnAirTemp is 0, then the space temperature sensor

is selected. When nciConfig.ControlUsesRtnAirTemp is 1, then the return

temperature sensor is selected. If the network input and the selected local

sensor has failed or are not configured, siSpaceTempS7 is SI_INVALID.

Table 23. Status Points. (Continued)

User Address NvName Field Name Engineering Units: English

(Metric) or States plus Range

Digital State or

Value of State

Default

E-Vision (M, P, S)

Share

Map

Direct Access

Hardware Config.

Manual Config.

Test

E-Vision Legend: (M) Monitor, (P) Parameter, (S) Schematic

Comments

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

89 74-2958—1

DaTemp nvoData2

(nvoCtlDataG2) siDischargeTempS7 Degrees F

30 to 122

Degrees C

(-1 to 50)

SI_INVALID X siDischargeTempS7: siDischargeTempS7 is the discharge air temperature

used by the control process and is read from the local sensor via

nvoIO.siDischargeTempS7. If the sensor has failed or is not configured,

siDischargeTempS7 is SI_INVALID.

DaSetpt nvoData2

(nvoCtlDataG2) siDischargeSetPtS7 Degrees F

30 to 122

Degrees C

(-1 to 50)

SI_INVALID X siDischargeSetPtS7: siDischargeSetPtS7 is the calculated desired

discharge air temperature when cascade control is being used.

RaTemp nvoData2

(nvoCtlDataG2) siReturnTempS7 Degrees F

30 to 122

Degrees C

(-1 to 50)

SI_INVALID X siReturnTempS7: siReturnTempS7 is the return air temperature used by the

control process read from the local sensor via nvoIO.siReturnTempS7. If

the sensor has failed or is not configured, siReturnTempS7 is SI_INVALID.

RaHum nvoData2

(nvoCtlDataG2) ubReturnHumidityS1 Percentage

10 to 90 UB_INVALID X ubReturnHumidityS1: ubReturnHumidityS1 is the return air humidity used

by the control process and is read from the local sensor via

nvoIO.ReturnHumidity. If the sensor has failed or is not configured

ubReturnHumidityS1 is UB_INVALID.

RaEnth nvoData2

(nvoCtlDataG2) siReturnEnthalpyS7 mA

4 to 20 SI_INVALID X siReturnEnthalpyS7: siReturnEnthalpyS7 is the return air enthalpy used by

the control process and is read from the local sensor via

nvoIO.siReturnEnthalpyS7. If the sensor has failed or is not configured,

siReturnEnthalpyS7 is SI_INVALID.

OaTemp nvoData2

(nvoCtlDataG2) siOutdoorTempS7 Degrees F

-40 to 122

Degrees C

(-40 to 43)

SI_INVALID X siOutdoorTempS7: siOutdoorTempS7 is the outdoor air temperature used

by the control process and is read from another node via nviOdTemp or the

local sensor via nvoIO.siOutdoorTempS7. If the network input is not

SI_INVALID, then the network input has priority. If both the network input

and the local sensor have failed or are not configured, siOutdoorTempS7 is

SI_INVALID.

OaHum nvoData2

(nvoCtlDataG2) ubOutdoorHumidityS1 Percentage

10 to 90 UB_INVALID X ubOutdoorHumidityS1: ubOutdoorHumidityS1 is the outdoor air humidity

used by the control process and is read from another node via nviOdHum

or the local sensor via nvoIO.OutdoorHumidity. If the network is not

SI_INVALID, then the network input has priority. If both the network input

and the local sensor have failed or are not configured,

ubOutdoorHumidityS1 is UB_INVALID.

OaEnth nvoData2

(nvoCtlDataG2) siOutdoorEnthalpyS7 mA

4 to 20 SI_INVALID X siOutdoorEnthalpyS7: siOutdoorEnthalpyS7 is the outdoor air enthalpy

used by the control process and is read from another node via

nviOdEnthS7 or the local sensor via nvoIO.siOutdoorEnthalpyS7. If the

network input is not SI_INVALID, then the network input has priority. If both

the network input and the local sensor have failed or are not configured,

siOutdoorEnthalpyS7 is SI_INVALID.

FilterPress nvoData2

(nvoCtlDataG2) siFilterPressureS10 inw (kPa)

0 to 5 (0 to 1.25) SI_INVALID X siFilterPressureS10: siFilterPressureS10 is air pressure across the air filter

used by the control process and is read from the local sensor via

nvoIO.siFilterPressureS10. If the local sensor has failed or is not

configured, siFilterPressureS10 is SI_INVALID.

CO2Sens nvoCtlDataG2 siSpaceCo2S0 PPM

150 to 2000 SI_INVALID X siSpaceCo2S0: siSpaceCo2S0 is the indoor air CO2 content used by the

control process and read the local sensor via nvoIO.siSpaceCo2S0. If the

local sensor has failed or is not configured, siSpaceCo2S0 is SI_INVALID.

Table 23. Status Points. (Continued)

User Address NvName Field Name Engineering Units: English

(Metric) or States plus Range

Digital State or

Value of State

Default

E-Vision (M, P, S)

Share

Map

Direct Access

Hardware Config.

Manual Config.

Test

E-Vision Legend: (M) Monitor, (P) Parameter, (S) Schematic

Comments

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

74-2958—190

MonitorSens nvoCtlDataG2 siMonitor1S10 volts

1 to 10 SI_INVALID X siMonitor1S10: siMonitor1S10 is the voltage applied at the monitor input

terminals. If the sensor is not configured or has failed, the value is

SI_INVALID.

CoolPos nvoCtlDataG2 sbCoolPosS0 Percentage

0 to 100 0 X sbCoolPosS0: If the node is configured for modulating cool, sbCoolPosS0

shows the current position of the cooling modulating output.

HeatPos nvoCtlDataG2 sbHeatPosS0 Percentage

0 to 100 0 X sbHeatPosS0: If the node is configured for modulating heat, sbHeatPosS0

shows the current position of the heating modulating output.

EconPos nvoCtlDataG2 sbEconPosS0 Percentage

0 to 100 0 X sbEconPosS0: If the node is configured for modulating economizer,

sbEconPosS0 shows the current position of the economizer modulating

output.

StatusError nvoError error_bit[0]

Byte Offset = 0

Bit Offset = 0

(SpaceTempError)

FALSE

TRUE 0

1FALSE X For SpaceTempError, a value of 1 (TRUE) indicates that data was not

available from the sensor and will result in a SENSOR_FAILURE alarm. A

value of 0 (FALSE) indicates a normal condition. The heating and cooling

control loops will be turned off it there is a space temp sensor failure. The

fan will remain under normal control.

nvoError error_bit[0]

Byte Offset = 0

Bit Offset = 1

(SetPtError)

FALSE

TRUE 0

1FALSE For SetPtError, see preceding. Upon a failure of the local setpoint, the

control loop will use the default occupied setpoints to control space

temperature.

nvoError error_bit[0]

Byte Offset = 0

Bit Offset = 2

(OdTempError)

FALSE

TRUE 0

1FALSE For OdTempError, see preceding. All control functions associated with the

failed sensor are disabled as if the sensor was not configured.

nvoError error_bit[0]

Byte Offset = 0

Bit Offset = 3

(OdHumError)

FALSE

TRUE 0

1FALSE For OdHumError, see preceding. A value of 0 (FALSE) indicates a normal

condition. All control functions associated with the failed sensor are

disabled as if the sensor was not configured.

nvoError error_bit[0]

Byte Offset = 0

Bit Offset = 4

(OdEnthalpyError)

FALSE

TRUE 0

1FALSE OdEnthalpyError: All control functions associated with the failed sensor are

disabled as if the sensor was not configured.

nvoError error_bit[0]

Byte Offset = 0

Bit Offset = 5

(DischgTempError)

FALSE

TRUE 0

1FALSE DischgTempError: All control functions associated with the failed sensor are

disabled as if the sensor was not configured.

nvoError error_bit[0]

Byte Offset = 0

Bit Offset = 6

RtnTempError)

FALSE

TRUE 0

1FALSE RtnTempError: All control functions associated with the failed sensor are

disabled as if the sensor was not configured.

nvoError error_bit[0]

Byte Offset = 0

Bit Offset = 7

(RtnHumError)

FALSE

TRUE 0

1FALSE RtnHumError: All control functions associated with the failed sensor are

disabled as if the sensor was not configured.

Table 23. Status Points. (Continued)

User Address NvName Field Name Engineering Units: English

(Metric) or States plus Range

Digital State or

Value of State

Default

E-Vision (M, P, S)

Share

Map

Direct Access

Hardware Config.

Manual Config.

Test

E-Vision Legend: (M) Monitor, (P) Parameter, (S) Schematic

Comments

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

91 74-2958—1

nvoError error_bit[1]

Byte Offset = 1

Bit Offset = 0

(RtnEnthalpyError)

FALSE

TRUE 0

1FALSE RtnEnthalpyError: All control functions associated with the failed sensor are

disabled as if the sensor was not configured.

nvoError error_bit[1]

Byte Offset = 1

Bit Offset = 1

(MonitorSensorError)

FALSE

TRUE 0

1FALSE MonitorSensorError: All control functions associated with the failed sensor

are disabled as if the sensor was not configured.

nvoError error_bit[1]

Byte Offset = 1

Bit Offset = 2

(SpaceCO2Error)

FALSE

TRUE 0

1FALSE SpaceCO2Error: All control functions associated with the failed sensor are

disabled as if the sensor was not configured.

nvoError error_bit[1]

Byte Offset = 1

Bit Offset = 3

(FilterStaticPresError)

FALSE

TRUE 0

1FALSE FilterStaticPresError: All control functions associated with the failed sensor

are disabled as if the sensor was not configured.

nvoError error_bit[1]

Byte Offset = 1

Bit Offset = 4

(ADCalError)

FALSE

TRUE 0

1FALSE ADCalError: All control functions associated with the failed sensor are

disabled as if the sensor was not configured.

nvoError error_bit[1]

Byte Offset = 1

Bit Offset = 7

(nvApplModeError)

FALSE

TRUE 0

1FALSE ApplModeError: All control functions associated with the failed NV are

disabled as if the NV was not configured.

nvoError error_bit[2]

Byte Offset = 2

Bit Offset = 0

(nvSetPtOffsetError)

FALSE

TRUE 0

1FALSE SetPtOffsetError: All control functions associated with the failed NV are

disabled as if the NV was not configured.

nvoError error_bit[2]

Byte Offset = 2

Bit Offset = 1

(nvSpaceTempError)

FALSE

TRUE 0

1FALSE SpaceTempError: All control functions associated with the failed NV are

disabled as if the NV was not configured.

nvoError error_bit[2]

Byte Offset = 2

Bit Offset = 2

(nvOdTempError)

FALSE

TRUE 0

1FALSE OdTempError: All control functions associated with the failed NV are

disabled as if the NV was not configured.

nvoError error_bit[2]

Byte Offset = 2

Bit Offset = 3

(nvOdHumError)

FALSE

TRUE 0

1FALSE OdHumError: All control functions associated with the failed NV are

disabled as if the NV was not configured.

nvoError error_bit[2]

Byte Offset = 2

Bit Offset = 4

(nvSensorOccError)

FALSE

TRUE 0

1FALSE SensorOccError: All control functions associated with the failed NV are

disabled as if the NV was not configured.

Table 23. Status Points. (Continued)

User Address NvName Field Name Engineering Units: English

(Metric) or States plus Range

Digital State or

Value of State

Default

E-Vision (M, P, S)

Share

Map

Direct Access

Hardware Config.

Manual Config.

Test

E-Vision Legend: (M) Monitor, (P) Parameter, (S) Schematic

Comments

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

74-2958—192

nvoError error_bit[2]

Byte Offset = 2

Bit Offset = 5

(nvWindowError)

FALSE

TRUE 0

1FALSE WindowError: All control functions associated with the failed NV are

disabled as if the NV was not configured.

nvoError error_bit[2]

Byte Offset = 2

Bit Offset = 6

(nvDlcShedError)

FALSE

TRUE 0

1FALSE DlcShedError: All control functions associated with the failed NV are

disabled as if the NV was not configured.

nvoError error_bit[2]

Byte Offset = 2

Bit Offset = 7

(nvTodEventError)

FALSE

TRUE 0

1FALSE TodEventError: All control functions associated with the failed NV are

disabled as if the NV was not configured.

nvoError error_bit[3]

Byte Offset = 3

Bit Offset = 0

(nvByPassError)

FALSE

TRUE 0

1FALSE ByPassError: All control functions associated with the failed NV are

disabled as if the NV was not configured.

nvoError error_bit[3]

Byte Offset = 3

Bit Offset = 1

(nvOdEnthalpyError)

FALSE

TRUE 0

1FALSE OdEnthalpyError: All control functions associated with the failed NV are

disabled as if the NV was not configured.

nvoError error_bit[3]

Byte Offset = 3

Bit Offset = 2

(nvEconError)

FALSE

TRUE 0

1FALSE EconError: All control functions associated with the failed NV are disabled

as if the NV was not configured.

nvoError error_bit[3]

Byte Offset = 3

Bit Offset = 3

(nvIaqOverrideError)

FALSE

TRUE 0

1FALSE IaqOverrideError: All control functions associated with the failed NV are

disabled as if the NV was not configured.

nvoError error_bit[3]

Byte Offset = 3

Bit Offset = 4

(nvFree1Error)

FALSE

TRUE 0

1FALSE Free1Error: All control functions associated with the failed NV are disabled

as if the NV was not configured.

Table 23. Status Points. (Continued)

User Address NvName Field Name Engineering Units: English

(Metric) or States plus Range

Digital State or

Value of State

Default

E-Vision (M, P, S)

Share

Map

Direct Access

Hardware Config.

Manual Config.

Test

E-Vision Legend: (M) Monitor, (P) Parameter, (S) Schematic

Comments

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

93 74-2958—1

nvoError error_bit[3]

Byte Offset = 3

Bit Offset = 5

(nvFree2Error)

FALSE

TRUE 0

1FALSE Free2Error: All control functions associated with the failed NV are disabled

as if the NV was not configured.

nvoError error_bit[3]

Byte Offset = 3

Bit Offset = 6

(nvTimeClockError)

FALSE

TRUE 0

1FALSE TimeClockError: All control functions associated with the failed NV are

disabled as if the NV was not configured.

nvoError error_bit[3]

Byte Offset = 3

Bit Offset = 7

(nvWSHPEnError)

FALSE

TRUE 0

1FALSE WSHPEnError: All control functions associated with the failed NV are

disabled as if the NV was not configured.

NetConfig nciNetConfig CFG_LOCAL

CFG_EXTERNAL

CFG_NUL

0

1

255

CFG_LOCAL All nodes that support self-installation provide a configuration variable to

allow a network management tool to also install the node. nciNetConfig is

only used by a network management tool and may have the following

values: CFG_LOCAL - Node will use self installation functions to set its own

network image. CFG_EXTERNAL - The nodes network image has been set

by an external source.

Table 23. Status Points. (Continued)

User Address NvName Field Name Engineering Units: English

(Metric) or States plus Range

Digital State or

Value of State

Default

E-Vision (M, P, S)

Share

Map

Direct Access

Hardware Config.

Manual Config.

Test

E-Vision Legend: (M) Monitor, (P) Parameter, (S) Schematic

Comments

Table 24. Calibration Points.

User Address NvName Field Name Engineering Units: English

(Metric) or States plus Range

Digital State or

Value of State

Default

E-Vision (M, P, S)

Share

Map

Direct Access

Hardware Config.

Manual Config.

Test

E-Vision Legend: (M) Monitor, (P) Parameter, (S) Schematic

Comments

nvoRaw K1Raw

K2Raw

Ai1Resistive

Ai2Resistive

Ai3Voltage

Ai4Voltage

RawSpaceTemp

RawSetPoint

Counts

0 to 65535 0 raw_data contains the analog to digital converter counts measured from the

analog input channel.

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

74-2958—194

Table 25. Configuration Parameters.

User Address NvName Field Name Engineering Units: English

(Metric) or States plus Range

Digital State or

Value of State

Default

E-Vision (M, P, S)

Share

Map

Direct Access

Hardware Config.

Manual Config.

Test

E-Vision Legend: (M) Monitor, (P) Parameter, (S) Schematic

NOTE: Physical I/O points that are configurable are in Table 20.

Comments

nciDeviceName ASCII Blanks DeviceName is an 18 character field used to identify the node uniquely as

one object at the site or project. The contents of the DeviceName is

maintained by a management node. If DeviceName is all ASCII blanks, it is

considered unconfigured.

nciApplVer application_type 0 to 255 0 ApplicationType identifies the current application number of the Excel 10.

nciApplVer version_no 0 to 255 0 VersionNumber identifies the version number of the Excel 10 application.

nciApplVer time Seconds 0 The time stamp of the last change to the Excel 10 application

configuration. Time meets the ANSI C time stamp requirement specifying

the number of seconds elapsed since midnight (0:00:00), January 1, 1970.

It is represented in the Intel Format.

FanMode nciConfig FanMode AUTO_FAN

CONTINUOUS_FAN 0

1AUTO_FAN P X X FanMode specifies the operation of the fan. If the FanMode is 0

(AUTO_FAN), then the fan cycles on and off with demand for cooling and

may cycle with heating if FanOnHeat is TRUE. If the FanMode is 1

(CONTINUOUS_FAN), then the fan runs continuously when the effective

occupancy is OC_OCCUPIED or OC_BYPASS. The fan cycles on and off

with demand for cooling and may cycle with heating if FanOnHeat is TRUE

during the OC_UNOCCUPIED or OC_STANDBY modes.

EconMode nciConfig EconEnable DIGITAL_IN

OD_TEMP

OD_ENTH_A_TYPE

OD_ENTH_B_TYPE

OD_ENTH_C_TYPE

OD_ENTH_D_TYPE

DIFF_TEMP

SINGLE_ENTH

DIFF_ENTH

ECON_NUL

0

1

2

3

4

5

6

7

8

255

ECON_NUL P X X EconEnable specifies the method used to determine when outside air is

suitable for use to augment cooling. The valid values are according to the

enumerated list that is shown in the Engineering Units/States column.

SmkCtlMode nciConfig SmokeControl FAN_OFF_DAMPER_CLOSED

FAN_ON_DAMPER_OPEN

FAN_ON_DAMPER_CLOSED

0

1

2

FAN_OFF_DAMPER_

CLOSED P X X SmokeControl specifies the operation of the economizer damper and the

fan when the mode is SMOKE_EMERGENCY.

HeatCycHr nciConfig ubHeatCph 2 to 12 6 P X X HeatCph specifies the mid-load number of on/off cycles per hour when the

mode is HEAT. In addition the cycle rate specifies the minimum on and off

time. Refer to Table 17 Interstage Minimum Times of the System

Engineering Guide for the actual values.

CoolCycHr nciConfig ubCoolCph 2 to 12 3 P X X CoolCph specifies the mid-load number of on/off cycles per hour when the

mode is COOL. In addition the cycle rate specifies the minimum on and off

time. Refer to Table 17 Interstage Minimum Times of the System

Engineering Guide for the actual values.

FanRunOnCool nciConfig ubFanRunonCoolS0 Seconds

0 to 120 0 P X X FanRunonCool specifies how long the fan runs after all the cooling stages

have turned off. The fan is turned off FanRunonCool seconds after all the

cooling demand has turned off.

FanRunOnHeat nciConfig ubFanRunonHeatS0 Seconds

0 to 120 0 P X X FanRunonHeat specifies how long the fan runs after all the heating stages

have turned off. The fan is turned off FanRunonHeat seconds after all the

heating demand has turned off.

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

95 74-2958—1

EconMtrSpd nciConfig ubEconMtrTimeS0 Seconds

20 to 240 90 P X X EconMtrTime specifies how long it takes the economizer damper motor to

travel from fully closed to fully open. This time is used to calculate the

reported position of the damper and to determine the length of over drive

time required to assure the damper is fully closed or open.

CoolMtrSpd nciConfig ubCoolMtrTimeS0 Seconds

20 to 240 90 P X X CoolMtrTime specifies how long it takes the cooling damper or valve motor

to travel from fully closed to fully open. This time is used to calculate the

reported position of the cooling damper or valve and to determine the

length of over drive time required to assure that it is fully closed or open.

HeatMtrSpd nciConfig ubHeatMtrTimeS0 Seconds

20 to 240 90 P X X HeatMtrTime specifies how long it takes the heating damper or valve motor

to travel from fully closed to fully open. This time is used to calculate the

reported position of the heating damper or valve and to determine the

length of over drive time required to assure that it is fully closed or open.

FanFailTime nciConfig ubFanFailTimeS0 Seconds

1 to 255 10 P X X Each time FAN_OUT is energized, then the node waits for FanFailTime

seconds to sample the ProofAirFlow input. If ProofAirFlow shows that the

fan is not running for FanFailTime consecutive seconds, then the control is

shut down for the minimum off time. Then the control (including the fan) is

restarted and ProofAirFlow is again tested. If ProofAirFlow shows air flow,

then the control continues to operate, but if ProofAirFlow fails to show air

flow, then the control is again shut down for the minimum off time. After

three unsuccessful restarts, a LOSS_OF_AIR_FLOW alarm is issued and

the control stays in the DISABLED mode with the FAN_OUT off.

RmTempCal nciConfig siSpaceTempZeroCalS7 Degrees F

-5 to 5 (-3 to 3) 0 X X SpaceTempZeroCal provides offset calibration for the space analog sensor

input and is added to the sensed value. The range of SpaceTempZeroCal

is between -5 and 5 degrees F.

TempOffstCal1 nciConfig siResistiveOffsetCalS7[0] Degrees F

-15 to 15 (-9 to 9) 0 ResistiveOffsetCal[0] provides offset calibration for the resistive analog

sensor input and is added to the sensed value. The range of

ResistiveOffsetCal[0] is between -15 and 15 degrees F.

TempOffstCal2 nciConfig siResistiveOffsetCalS7[1] Degrees F

-15 to 15 (-9 to 9) 0 ResistiveOffsetCal[1] provides offset calibration for the resistive analog

sensor input and is added to the sensed value. The range of

ResistiveOffsetCal[1] is between -15 and 15 degrees F.

VoltOffstCal1 nciConfig siVoltageOffsetCalS12[0] volts

-1 to 1 0 VoltageOffsetCal[0] provides offset calibration for the voltage/current

analog sensor input and is added to the sensed value. The current analog

sensor is converted to a voltage by a 249 ohm resister wired across the

input terminals. The range of VoltageOffsetCal[0] is between -1 and 1 volt.

Voltage offsets are new in engineering units (not volts).

VoltOffstCal2 nciConfig siVoltageOffsetCalS12[1] volts

-1 to 1 0 VoltageOffsetCal[1] provides offset calibration for the voltage/current

analog sensor input and is added to the sensed value. The current analog

sensor is converted to a voltage by a 249 ohm resister wired across the

input terminals. The range of VoltageOffsetCal[1] is between -1 and 1 volt.

Voltage offsets are new in engineering units (not volts).

FanOnHtMode nciConfig FanOnHeat FALSE

TRUE 0

1TRUE P X X FanOnHeat specifies the operation of the fan during HEAT mode. If

FanOnHeat is 1(TRUE), then the fan is on when the mode is HEAT. If

FanOnHeat is a 0 (FALSE) the fan is never turned on when the mode is

HEAT, and typically a thermostatically controlled switch sensing heated air

temperature turns on the fan.

Table 25. Configuration Parameters. (Continued)

User Address NvName Field Name Engineering Units: English

(Metric) or States plus Range

Digital State or

Value of State

Default

E-Vision (M, P, S)

Share

Map

Direct Access

Hardware Config.

Manual Config.

Test

E-Vision Legend: (M) Monitor, (P) Parameter, (S) Schematic

NOTE: Physical I/O points that are configurable are in Table 20.

Comments

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

74-2958—196

DisMinHtTime nciConfig DisableHeatMinTime FALSE

TRUE 0

1FALSE P X X If DisableHeatMinTime is 0 (FALSE), the heating stages are on or off for a

minimum time determined by ubHeatCph (Refer to Table 17 Interstage

Minimum Times of the System Engineering Guide). If DisableHeatMinTime

is 1 (TRUE), the heating stages are on or off for a 30 second minimum

time.

DisMinClTime nciConfig DisableCoolMinTime FALSE

TRUE 0

1FALSE P X X If DisableCoolMinTime is 0 (FALSE), the cooling stages are on or off for a

minimum time determined by CoolCph (Refer to Table 17 Interstage

Minimum Times of the System Engineering Guide). If DisableCoolMinTime

is 1 (TRUE), the cooling stages are on or off for a 30 second minimum

time.

CascCntrl nciConfig CascadeControl FALSE

TRUE 0

1FALSE P X X When CascadeControl is 0 (FALSE), then the discharge air temperature is

not directly controlled and heating and cooling equipment are modulated to

maintain space temperature. When CascadeControl is 1 (TRUE), then the

discharge air temperature is controlled by an additional control loop based

on the error signal from the space temperature control loop. Cascade

Control is applicable to modulating heating/cooling only (not staged).

UseRaTempCtl nciConfig ControlUsesRtnAirTemp FALSE

TRUE 0

1FALSE P X X If ControlUsesRtnAirTemp is a 0 (FALSE), then Data2.SpaceTemp is set

equal either the space temperature sensor (IO.siSpaceTemp) or

SpaceTemp depending on the value of SpaceTemp. When

ControlUsesRtnAirTemp is 1 (TRUE) and SpaceTemp is SI_INVALID, then

Data2.SpaceTemp is set equal to return air sensor (IO.ReturnTemp) and

the control uses the return air sensor to control heating or cooling. When

ControlUsesRtnAirTemp is 1 (TRUE) and SpaceTemp is not SI_INVALID,

then Data2.siSpaceTemp is set equal to SpaceTemp and the control uses

SpaceTemp to control heating or cooling.

IaqUseHeat nciConfig IaqUseHeat FALSE

TRUE 0

1FALSE P X X When the effective occupancy is OC_OCCUPIED and IaqUseHeat is 0

(FALSE), then no heating stages or modulating heating are turned when

the discharge air temperature goes below the low limit. Energy has priority

over ventilation. When the effective occupancy is OC_OCCUPIED and

IaqUseHeat is 1 (TRUE), then the heating stages or modulating heating

are turned on to prevent the discharge air temperature from going below

the discharge air temperature low limit. Ventilation has priority over energy

cost.

Table 25. Configuration Parameters. (Continued)

User Address NvName Field Name Engineering Units: English

(Metric) or States plus Range

Digital State or

Value of State

Default

E-Vision (M, P, S)

Share

Map

Direct Access

Hardware Config.

Manual Config.

Test

E-Vision Legend: (M) Monitor, (P) Parameter, (S) Schematic

NOTE: Physical I/O points that are configurable are in Table 20.

Comments

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

97 74-2958—1

OvrdPriority nciConfig OverridePriority LAST

NET 0

1NET P X X OverridePriority configures the override arbitration between ManOcc,

Bypass.state, and the wall module override button. If OverridePriority is 0

(LAST), then the last command received from either the wall module or

iManOcc determines the effective override state. If OverridePriority is 1

(NET), this specifies that when ManOcc is not OC_NUL, that the effective

occupancy is ManOcc regardless of the wall module override state.

UseWallModStpt nciConfig UseWallModStPt FALSE

TRUE 0

1TRUE P X X UseWallModStpt specifies the OC_OCCUPIED temperature setpoint

source. If UseWallModStpt is 0 (FALSE), then the occupied TempSetPts

are used when the effective occupancy is OC_OCCUPIED. If

UseWallModStpt is 1 (TRUE), then the wall modules setpoint knob is used

when the effective occupancy is OC_OCCUPIED. SetPt overrides all.

SetPtKnob nciConfig SetPntKnob OFFSET

ABSOLUTE_MIDDLE 0

1ABSOLUTE_MIDDLE P X X SetPntKnob specifies the usage of the setpoint knob when

UseWallModStPt is TRUE. When SetPntKnob is 0 (ABSOLUTE_MIDDLE),

the setpoint knob directly determines the center point of between the

OC_OCCUPIED cooling and heating setpoints. When SetPntKnob is 1

(OFFSET), the effective setpoint is calculated by adding the remote

setpoint potentiometer value (center scale = 0) to the appropriate value of

TempSetPts.

OvrdType nciConfig OverrideType NONE

NORMAL

BYPASS_ONLY

0

1

2

NORMAL P X X OverrideType specifies the behavior of the override button. If the

OverrideType is 0 (NONE) then the override button is disabled. An

OverrideType of 1 (NORMAL), causes the override button to set the

OverRide state to OC_BYPASS for Aux2SetPt.BypassTime seconds when

the override button has been pressed for approximately 1 to 4 seconds, or

to set the OverRide state to UNOCC when the button has been pressed for

approximately 4 to 7 seconds. When the button is pressed longer than

approximately 7 seconds, then the OverRide state is set to OC_NUL. If the

OverrideType is 2 (BYPASS_ONLY), the override button sets the OverRide

state to OC_BYPASS for Aux2SetPt.BypassTime seconds on the first

press. On the next press, the OverRide state is set to OC_NUL.

Table 25. Configuration Parameters. (Continued)

User Address NvName Field Name Engineering Units: English

(Metric) or States plus Range

Digital State or

Value of State

Default

E-Vision (M, P, S)

Share

Map

Direct Access

Hardware Config.

Manual Config.

Test

E-Vision Legend: (M) Monitor, (P) Parameter, (S) Schematic

NOTE: Physical I/O points that are configurable are in Table 20.

Comments

Table 26. LONMARK®/Open System Points.

User Address NvName Field Name Engineering Units: English

(Metric) or States plus Range

Digital State or

Value of State

Default

E-Vision (M, P, S)

Share

Map

Direct Access

Hardware Config.

Manual Config.

Failure Detect

E-Vision Legend: (M) Monitor, (P) Parameter, (S) Schematic

Comments

nciNodeSendT

(SNVT_time_sec) Seconds 0 The maximum time between updates of network variable outputs from the

node object.

nciRtuSendT

(SNVT_time_sec) Seconds 0 The SGPUC and SGPU time (heart beat time) between updates of network

variable outputs.NOTE: RtuSendT should be set to 55 seconds by a

management node to be compatible with a Honeywell system.

nciRtuRcvT

(SNVT_time_sec) Seconds 0 This is the failure detection time for network SGPUC and SGPU variables

outputs.NOTE: RtuRcvT should be set to 300 seconds by a management

node to be compatible with a Honeywell system.

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

74-2958—198

CoolOccSpt nciTempSetPts

(SNVT_temp_setpt) occupied_cool Degrees F

50 to 95

Degrees C

(10 to 35)

23 P,

MX X The Cooling Occupied Setpoint is used if no wall module setpoint pot is

configured as the standard Occupied Cooling Setpoint. Actual Cooling

Setpoint can be affected by various control parameters (such as DlcShed,

SrcRmtTempSpt, etc.). Actual room temperature Setpoint is reflected in

RmTempActSpt. Overridden by nviSetPt. Used to compute ZEB.

CoolStbySpt nciTempSetPts

(SNVT_temp_setpt) standby_cool Degrees F

50 to 95

Degrees C

(10 to 35)

25 P,

MX X When the controller is in the Standby mode (typically via an occupancy

sensor), the base Cooling Setpoint is determined by the Cooling Standby

Setpoint value. Also, when a wall module setpoint pot is configured, this

value serves as the upper limit on the user adjustable remote setpoint pot

(wall module).

CoolUnoccSpt nciTempSetPts

(SNVT_temp_setpt) unoccupied_cool Degrees F

50 to 95

Degrees C

(10 to 35)

28 P,

MX X When the controller is in the Unoccupied mode, the unit responds to a call

for cooling based on the Cooling Unoccupied Setpoint.

HeatOccSpt nciTempSetPts

(SNVT_temp_setpt) occupied_heat Degrees F

50 to 95

Degrees C

(10 to 35)

21 P,

MX X When the controller is in the Occupied mode, if the space temperature

drops below the Heating Occupied Setpoint, the unit switches to the

Heating mode. This Setpoint is used only when there is no wall module

setpoint pot configured. Overridden by nviSetPt. Used to compute ZEB.

HeatStbySpt nciTempSetPts

(SNVT_temp_setpt) standby_heat Degrees F

50 to 95

Degrees C

(10 to 35)

19 P,

MX X When the controller is in the Standby mode (typically via an occupancy

sensor), the base Heating Setpoint is determined by the Heating Standby

Setpoint value. Also, when a wall module setpoint pot is configured, this

value serves as the lower limit on the user adjustable remote setpoint pot

(wall module).

HeatUnoccSpt nciTempSetPts

(SNVT_temp_setpt) unoccupied_heat Degrees F

50 to 95

Degrees C

(10 to 35)

16 P,

MX X When the controller is in the Unoccupied mode, the unit responds to a call

for heating based on the Heating Unoccupied Setpoint.

nviRequest

(SNVT_obj_request) object_id 0 to 65535 1 Request provides the mechanism to request a particular status report (via

Status) for a particular object within this node. Object_id selects the object

being referenced by nviRequest. The only valid value of object_id is 1 for

the RTU object and all others are invalid.

nviRequest

(SNVT_obj_request) object_request RQ_NORMAL

RQ_DISABLED

RQ_UPDATE_STATUS

RQ_SELF_TEST

RQ_UPDATE_ALARM

RQ_REPORT_MASK

RQ_OVERRIDE

RQ_ENABLE

RQ_RMV_OVERRIDE

RQ_CLEAR_STATUS

RQ_CLEAR_ALARM

RQ_NUL

0

1

2

3

4

5

6

7

8

9

10

255

RQ_NORMAL When object_request is RQ_NORMAL or RQ_UPDATE_STATUS then the

status (via Status) will be reported for the object addressed by object_id.

When object_request is RQ_REPORT_MASK then the status bits will be

reported that are supported in nvoStatus by the object addressed by

object_id. Bits that are supported by the object are set to one. All other

object_request items are not supported at this time and will return an

invalid_request (Status) in the object status.

Table 26. LONMARK®/Open System Points. (Continued)

User Address NvName Field Name Engineering Units: English

(Metric) or States plus Range

Digital State or

Value of State

Default

E-Vision (M, P, S)

Share

Map

Direct Access

Hardware Config.

Manual Config.

Failure Detect

E-Vision Legend: (M) Monitor, (P) Parameter, (S) Schematic

Comments

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

99 74-2958—1

DestHvacMode nviApplMode

(SNVT_hvac_mode) HVAC_AUTO

HVAC_HEAT

HVAC_MRNG_WRMUP

HVAC_COOL

HVAC_NIGHT_PURGE

HVAC_PRE_COOL

HVAC_OFF

HVAC_TEST

HVAC_EMERG_HEAT

HVAC_FAN_ONLY

HVAC_NUL

0

1

2

3

4

5

6

7

8

9

255

HVAC_AUTO M X X X X X ApplMode is an input that coordinates the roof top unit controller operation

with other controllers. HVAC_NIGHT_PURGE

HVAC_PRE_COOL

HVAC_MRNG_WRMUP

HVAC_NUL

HVAC_TEST are not supported and will default to the HVAC_AUTO setting

if received.

DestManOcc nviManOcc

(SNVT_occupancy) OC_OCCUPIED

OC_UNOCCUPIED

OC_BYPASS

OC_STANDBY

OC_NUL

0

1

2

3

255

OC_NUL X X X ManOcc is an input from a network connected operator interface or other

node that indicates the state of a manual occupancy control thus over

riding the scheduled occupancy state. ManOcc is used along with other

occupancy inputs to calculate the effective occupancy of the node. See the

Data1.EffectOcc and Data1.NetManOcc for more details.The valid

enumerated values have the following meanings: OC_OCCUPIED

indicates occupied. OC_UNOCCUPIED indicates not occupied.

OC_BYPASS indicates that the space is occupied for

Aux2SetPt.BypassTime seconds after ManOcc is first set to OC_BYPASS.

The timing is done by the bypass timer in this node. If ManOcc changes to

another value the timer is stopped.OC_STANDBY indicates that the space

is in standby mode.OC_NUL and all unspecified values means that no

manual occupancy control is requested. When ManOcc changes from

OC_OCCUPIED, OC_UNOCCUPIED, OC_BYPASS, or OC_STANDBY to

OC_NUL, any bypass condition is canceled.

DestRmTempSpt nviSetPoint

(SNVT_temp_p) Degrees F

50 to 95

Degrees C

(10 to 35)

SI_INVALID X X X SetPoint is an input network variable used to determine the temperature

control point of the node. If SetPoint is not SI_INVALID, then it is used to

determine the control point of the node. If SetPoint is SI_INVALID, then

other means are used to determine the control point. See

Data2.TempControlPt for more information.

DestSptOffset nviSetPtOffset

(SNVT_temp_p) Degrees F

-18 to 18

Degrees C

-10 to 10

0 X X X X SetPtOffset is input from an operator terminal or from an energy

management system used to shift the effective temperature setpoint by

adding SetPtOffset to the otherwise calculated setpoint. If the value is

outside the allowed range of -10 to +10 degrees C (-18 to 18 degrees F),

then the node uses the value of the nearest range limit.

SrcRmTempActSpt nvoEffectSetPt

(SNVT_temp_p) Degrees F

50 to 95

Degrees C

(10 to 35)

SI_INVALID X X EffectSetPt is the current temperature control point (such that the current

actual space temperature setpoint which the controller is presently trying to

maintain in the conditioned space). See Data2.TempControlPt for more

details. EffectSetPt is updated according to the SGPU mechanism where a

significant change is plus or minus 0.07 degrees C (0.13 degrees F).

Table 26. LONMARK®/Open System Points. (Continued)

User Address NvName Field Name Engineering Units: English

(Metric) or States plus Range

Digital State or

Value of State

Default

E-Vision (M, P, S)

Share

Map

Direct Access

Hardware Config.

Manual Config.

Failure Detect

E-Vision Legend: (M) Monitor, (P) Parameter, (S) Schematic

Comments

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

74-2958—1 100

DestRmTemp nviSpaceTemp

(SNVT_temp_p) Degrees F

14 to 122

Degrees C

(-10 to 50)

SI_INVALID X X X X SpaceTemp is the space temperature sensed by another node and is

typically bound to SpaceTemp of another node having a space temperature

sensor. If SpaceTemp has a value other than SI_INVALID it is used as the

sensed space temperature by the node rather than using any local hard-

wired sensor. If the value is outside the allowed range of -10 to 50 degrees

C (-18 to 90 degrees F), then the node uses the value of the nearest range

limit. When SpaceTemp is not bound to another node, SpaceTemp may be

used to fix the sensed temperature. A management node may write a value

other than SI_INVALID, causing the node to use SpaceTemp instead of the

hard-wired sensor. An application restart or power failure causes the fixed

sensor value to be forgotten and SpaceTemp to be returned to

SI_INVALID.

SrcRmTemp nvoSpaceTemp

(SNVT_temp_p) Degrees F

14 to 122

Degrees C

(-10 to 50)

SI_INVALID X X SpaceTemp is the sensed space temperature from the locally wired sensor.

SpaceTemp is typically bound to SpaceTemp of another node which may

not have its own space temperature sensor but control the same space.

The reported space temperature includes the offset correction

Config.SpaceTempZeroCal. If the space temperature sensor is not

connected or is shorted, or if SpaceTemp is bound to another node, then

SpaceTemp is set to SI_INVALID.

DestOaTemp nviOdTemp

(SNVT_temp_p) Degrees F

-40 to 122

Degrees C

(-40 to 50)

SI_INVALID M X X X X OdTemp allows one outside air temperature sensor at a node to be shared

by many other nodes. When OdTemp is not SI_INVALID, then any local

sensor is ignored by the local control algorithm and OdTemp is used

instead. If the value is outside the allowed range of -40 to 50 degrees C (-

72 to 90 degrees F), then the node uses the value of the nearest range

limit.

SrcOaTemp nvoOdTemp

(SNVT_temp_p) Degrees F

-40 to 122

Degrees C

(-40 to 50)

SI_INVALID M X X OdTemp allows the local outdoor temperature sensor to be shared with

other nodes and is typically bound to OdTemp on other nodes. If the local

sensor is configured by Select, OdTemp is periodically sent on the network.

If the local sensor is not configured or currently showing an error, the value

is SI_INVALID.

DestOaHum nviOdHum

(SNVT_lev_percent) Percentage

10 to 90 SI_INVALID M X X X X OdHum allows one outdoor humidity sensor at a node to be shared by

many other nodes. When nviOdHum is not SI_INVALID, then the local

sensor, is ignored by the local control algorithm and OdHum is used

instead. If the value is outside the allowed range (10 to 90 percent), then

the node uses the value of the nearest range limit.

SrcOaHum nvoOdHum

(SNVT_lev_percent) Percentage

10 to 90 SI_INVALID M X X OdHum allows the local outdoor humidity sensor to be shared with other

nodes and is typically bound to OdHum on other nodes. If the local sensor

is configured by Select, OdHum is periodically sent on the network. If the

local sensor is not configured or currently showing an error, the value is

SI_INVALID.

Table 26. LONMARK®/Open System Points. (Continued)

User Address NvName Field Name Engineering Units: English

(Metric) or States plus Range

Digital State or

Value of State

Default

E-Vision (M, P, S)

Share

Map

Direct Access

Hardware Config.

Manual Config.

Failure Detect

E-Vision Legend: (M) Monitor, (P) Parameter, (S) Schematic

Comments

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

101 74-2958—1

DestEmergCmd nviEmerg

(SNVT_hvac_emerg) EMERG_NORMAL

EMERG_PRESSURIZE

EMERG_DEPRESSURIZE

EMERG_PURGE

EMERG_SHUTDOWN

EMERG_NUL

0

1

2

3

4

255

EMERG_NORMAL M X X X X Emerg is an emergency input from a device that determines the correct

action during a given emergency (such as a fire). If Emerg is

EMERG_NORMAL the fan and economizer damper are controlled by the

heating and cooling control algorithm. If Emerg is EMERG_PRESSURIZE,

then the fan is controlled on and the economizer damper is open. If Emerg

is EMERG_DEPRESSURIZE, then the fan is controlled on and the

economizer damper is closed. If Emerg is EMERG_SHUTDOWN, then the

fan is controlled off and the economizer damper is closed. If Emerg is

EMERG_PURGE, the fan and damper go to the state specified by

Config.SmokeControl. If Emerg is not configured then it is set to

EMERG_NUL.

SrcUnitStatus nvoUnitStatus

(SNVT_hvac_status) mode HVAC_AUTO

HVAC_HEAT

HVAC_MRNG_WRMUP

HVAC_COOL

HVAC_NIGHT_PURGE

HVAC_PRE_COOL

HVAC_OFF

HVAC_TEST

HVAC_EMERG_HEAT

HVAC_FAN_ONLY

HVAC_NUL

0

1

2

3

4

5

6

7

8

9

255

HVAC_NUL M X X Mode is set according to the Data1.mode. If Data1.mode is

START_UP_WAIT, SMOKE_EMERGENCY, or FREEZE_PROTECT, mode

is set to HVAC_NUL which indicates that the node is in a mode not

supported by the SNVT_hvac_mode data type. If Data1.mode is HEAT,

then mode is set to HVAC_HEAT which indicates that heating energy is

being supplied to the controlled space. If Data1.mode is COOL, then mode

is set to HVAC_COOL, which indicates that cooling energy is being

supplied to the controlled space. If Data1.mode is OFF_MODE or

DISABLED_MODE, then mode is set to HVAC_OFF which indicates that

the node is not running its normal temperature control and the outputs are

not turned off. If Data1.mode is EMERG_HEAT, mode is set to

HVAC_EMERG_HEAT where, in a heat pump application, the compressor

stages are disabled and only auxiliary heating stages are turned on. If

Data1.mode is MANUAL or FACTORY_TEST, mode is set to HVAC_TEST

which indicates that the node is in a manual or test mode. If Data1.mode is

FAN_ONLY, mode is set to HVAC_FAN_ONLY which indicates that the fan

is running but the space temperature control is turned off.

nvoUnitStatus

(SNVT_hvac_status) heat_output_primary Percentage

0 to 100 0 heat_output_primary reports the current percentage of heating stages or

modulating heat turned on. If the node is controlling a heat pump,

heat_output_primary reports the current percentage of compressor stages

turned on when the node is in the HVAC_HEAT mode.

nvoUnitStatus

(SNVT_hvac_status) heat_output_secondary Percentage

0 to 100 0 If the node is controlling a heat pump, heat_output_secondary reports the

current percentage of auxiliary heating stages turned on when the node is

in the HVAC_HEAT or HVAC_EMERG_HEAT mode. If the node is not

controlling a heat pump, heat_output_secondary is set to zero.

nvoUnitStatus

(SNVT_hvac_status) cool_output Percentage

0 to 100 0 cool_output reports the current percentage of cooling stages or modulating

cool turned on. If the node is controlling a heat pump, cool_output reports

the current percentage of compressor stages turned on when the node is in

the HVAC_COOL mode.

nvoUnitStatus

(SNVT_hvac_status) econ_output Percentage

0 to 100 0 If there is a modulating economizer configured, econ_output reports the

percentage that the economizer damper is opened. If no economizer is

configured, econ_output reports 0.

nvoUnitStatus

(SNVT_hvac_status) fan_output Percentage

0 to 100 0 When the fan is running, fan_output is 100 percent, and when the fan is not

running, fan_output is 0 percent.

Table 26. LONMARK®/Open System Points. (Continued)

User Address NvName Field Name Engineering Units: English

(Metric) or States plus Range

Digital State or

Value of State

Default

E-Vision (M, P, S)

Share

Map

Direct Access

Hardware Config.

Manual Config.

Failure Detect

E-Vision Legend: (M) Monitor, (P) Parameter, (S) Schematic

Comments

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

74-2958—1 102

nvoUnitStatus

(SNVT_hvac_status) in_alarm FALSE

TRUE

ALARM_NOTIFY_DISABLED

0

1

255

FALSE When there is an alarm reported by AlarmStatus, then in_alarm is set to 1

(TRUE), else in_alarm is set to 0 (FALSE). If alarms reporting is

suppressed via ManualMode, then in_alarm is set to

ALARM_NOTIFY_DISABLED.

nviInUse(unsigned

long) 0 To 65535 0 to FFFF InUse is used by a management node to indicate to all other management

nodes that it is logged on to the Excel 10 node and that they should not try

to interact with any of the Excel 10s network variables. Before the

management node reads or writes any network variables, the management

node checks nviInUse for a zero value meaning no other management

nodes are already logged on and that a management node may log on to

the node. Then the management node writes a number, 1 through 65534,

to nviInUse and periodically writes the same value to indicate that the

management node is still logged on. If there are no writes made to

nviInUse for approximately 60 seconds, then the Excel 10 resets nviInUse

to zero to automatically log off the management node. Before interacting

with any network variables, the management node verifies that the

nviInUse has not changed. The management node logs off by writing 0 to

nviInUse.During power up, an application restart, or return to on-line from

off-line, the Excel 10 sets InUse to 65535 to indicate to the management

node that it has returned to on-line.

nvoStatus

(SNVT_obj_request) object_id 0 to 65535 0 M X object_id is set to the current value of nviRequest.object_id

nvoStatus

(SNVT_obj_request) invalid_id FALSE

TRUE 0

1FALSE If Request.Object_id is not a valid object, invalid_id is set to 1 (TRUE)

otherwise it is set to 0 (FALSE).

nvoStatus

(SNVT_obj_request) invalid_request FALSE

TRUE 0

1FALSE If Request.object_request is not a valid request for the object addressed,

invalid_request is set to 1 (TRUE) otherwise it is set to 0 (FALSE).

nvoStatus

(SNVT_obj_request) disabled FALSE

TRUE 0

1FALSE The disabled field is not supported and is set to 0 (FALSE) unless

Request.object_request is RQ_REPORT_MASK, then disabled and

in_alarm are set to 1 (TRUE) to indicate that these functions are supported

while all other fields are set to 0 (FALSE).

nvoStatus

(SNVT_obj_request) out_of_limits FALSE

TRUE 0

1FALSE The out_of_limits field is not supported and is set to 0 (FALSE).

nvoStatus

(SNVT_obj_request) open_circuit FALSE

TRUE 0

1FALSE The open_circuit field is not supported and is set to 0 (FALSE).

nvoStatus

(SNVT_obj_request) out_of_service FALSE

TRUE 0

1FALSE The out_of_service field is not supported and is set to 0 (FALSE).

nvoStatus

(SNVT_obj_request) mechanical_fault FALSE

TRUE 0

1FALSE The mechanical_fault field is not supported and is set to 0 (FALSE).

nvoStatus

(SNVT_obj_request) feedback_failure FALSE

TRUE 0

1FALSE The feedback_failure field is not supported and is set to 0 (FALSE).

nvoStatus

(SNVT_obj_request) over_range FALSE

TRUE 0

1FALSE The over_range field is not supported and is set to 0 (FALSE).

nvoStatus

(SNVT_obj_request) under_range FALSE

TRUE 0

1FALSE The under_range field is not supported and is set to 0 (FALSE).

Table 26. LONMARK®/Open System Points. (Continued)

User Address NvName Field Name Engineering Units: English

(Metric) or States plus Range

Digital State or

Value of State

Default

E-Vision (M, P, S)

Share

Map

Direct Access

Hardware Config.

Manual Config.

Failure Detect

E-Vision Legend: (M) Monitor, (P) Parameter, (S) Schematic

Comments

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

103 74-2958—1

nvoStatus

(SNVT_obj_request) electrical_fault FALSE

TRUE 0

1FALSE The electrical_fault field is not supported and is set to 0 (FALSE).

nvoStatus

(SNVT_obj_request) unable_to_measure FALSE

TRUE 0

1FALSE The unable_to_measure field is not supported and is set to 0 (FALSE).

nvoStatus

(SNVT_obj_request) comm_failure FALSE

TRUE 0

1FALSE The comm_failure field is not supported and is set to 0 (FALSE).

nvoStatus

(SNVT_obj_request) fail_self_test FALSE

TRUE 0

1FALSE The fail_self_test field is not supported and is set to 0 (FALSE).

nvoStatus

(SNVT_obj_request) self_test_in_progress FALSE

TRUE 0

1FALSE The self_test_in_progress field is not supported and is set to 0 (FALSE).

nvoStatus

(SNVT_obj_request) locked_out FALSE

TRUE 0

1FALSE The locked_out field is not supported and is set to 0 (FALSE).

nvoStatus

(SNVT_obj_request) manual_control FALSE

TRUE 0

1FALSE The manual_control field is not supported and is set to 0 (FALSE).

nvoStatus

(SNVT_obj_request) in_alarm FALSE

TRUE 0

1FALSE If there are currently any active alarms reported by SrcUnitStatus.in_alarm

or SrcUnitStatus.in_alarm is set to ALARM_NOTIFY_DISABLED,in_alarm

is set to 1 (TRUE), otherwise in_alarm is set to 0 (FALSE). When

Request.object_request is RQ_REPORT_MASK, then disabled and

in_alarm are set to 1 (TRUE) to indicate that these functions are supported

while all other fields are set to 0 (FALSE).

nvoStatus

(SNVT_obj_request) in_override FALSE

TRUE 0

1FALSE The in_override field is not supported and is set to 0 (FALSE).

DestOccSensor nviSensorOcc

(SNVT_occupancy) OC_OCCUPIED

OC_UNOCCUPIED

OC_BYPASS

OC_STANDBY

OC_NUL

0

1

2

3

255

OC_NUL M X X X X nviSensorOcc allows an occupancy sensor at another node to be used as

the occupancy sensor for this node and is typically bound to SensorOcc of

another node. The nviSensorOcc input must show OC_UNOCCUPIED for

300 seconds before it is used by the controller for triggering UN_OC

operation. This makes it possible for several occupancy sensors to be

ORed together by binding them all to nviSensorOcc. If any one bound

occupancy sensor shows occupancy, then SensorOcc shows occupancy

for up to 300 seconds after the last sensor shows OC_OCCUPIED. The

valid states have the following meanings: OC_OCCUPIED indicates

occupied. OC_BYPASS, OC_STANDBY, and all unspecified values

indicates the same as OC_OCCUPIED. OC_UNOCCUPIED or OC_NUL

indicates not occupied.

SrcOccSensor nvoSensorOcc

(SNVT_occupancy) OC_OCCUPIED

OC_UNOCCUPIED

OC_BYPASS

OC_STANDBY

OC_NUL

0

1

2

3

255

OC_NUL M X X nvoSensorOcc is an output showing the current state of the hard wired

occupancy sensor. The valid states are as follows: OC_OCCUPIED

indicates that the space is occupied. OC_UNOCCUPIED indicates that the

space is not occupied. OC_NUL means no output is available because it is

not configured.

Table 26. LONMARK®/Open System Points. (Continued)

User Address NvName Field Name Engineering Units: English

(Metric) or States plus Range

Digital State or

Value of State

Default

E-Vision (M, P, S)

Share

Map

Direct Access

Hardware Config.

Manual Config.

Failure Detect

E-Vision Legend: (M) Monitor, (P) Parameter, (S) Schematic

Comments

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

74-2958—1 104

nviWindow

(SNVT_switch) value 0 to 100 0 Window allows the window sensor from another node to be used as the

window sensor and is typically bound to nvoWindow of another node.

Window must show that the window is closed for 300 seconds before

Window is used as window closed. This makes it possible for several

window sensors to be ORed together by binding them all to nviWindow. If

any one bound window sensor shows window open, then Window shows

window open for up to 300 seconds after the last sensor shows window

closed. If the state is SW_OFF or SW_NUL, then the result is Window

Closed. If the state is SW_ON and the value is 0, then the result is Window

Closed. If the node receives this combination of state and value, then state

is set to SW_OFF. If the state is SW_ON and the value is not zero, then the

result is Window Open. NOTE: nviWindow is called nviEnergyHoldOff in

the LONMARK compliance profile.

DestWndw nviWindow

(SNVT_switch) state SW_OFF

SW_ON

SW_NUL

0

1

255

SW_NUL M X X X X See the preceding.

SrcWndwCt nvoWindow

(SNVT_switch) value 0 to 100 0 X See the preceding.NOTE: nvoWindow is called nviEnergyHoldOff in the

LonMark compliance profile.

SrcWndw nvoWindow

(SNVT_switch) state SW_OFF

SW_ON

SW_NUL

0

1

255

SW_NUL M X X Window allows the hard wired window sensor to be used by other nodes on

the network. The valid states are as follows: If the state is SW_OFF and the

value is 0 then the result is Window Closed. If the state is SW_ON and the

value is 100 percent, the result is Window Open. If the state is SW_NUL

and the value is 0, the result is Window Sensor Not Configured. NOTE:

nvoWindow is called nviEnergyHoldOff in the LonMark compliance profile.

nviEcon

(SNVT_switch) value 0 to 100 0 nviEcon allows one controller to determine the suitability of outdoor air for

free cooling and share this with many other nodes. When Econ.state is not

SW_NUL, then the local sensor selected by Config.EconEnable is ignored

and Econ is used instead. The inputs states have the following meanings: If

the state is SW_OFF or other and the value is don’t care, then the outdoor

air is not suitable for free cooling. If the state is SW_ON and the value is 0,

then the outdoor air is not suitable for free cooling. If the node receives this

combination of state and value, then state is set to SW_OFF. If the state is

SW_ON and the value is not zero, then outdoor is suitable for free cooling.

If the state is SW_NUL, then the network variable is not bound, the

communications path from the sending node has failed, or the sending

node has failed. Outdoor air is not suitable for free cooling.

DestEconEnable nviEcon

(SNVT_switch) state SW_OFF

SW_ON

SW_NUL

0

1

255

SW_NUL M X X X X For nviEcon.state, refer to nviEcon.value.

Table 26. LONMARK®/Open System Points. (Continued)

User Address NvName Field Name Engineering Units: English

(Metric) or States plus Range

Digital State or

Value of State

Default

E-Vision (M, P, S)

Share

Map

Direct Access

Hardware Config.

Manual Config.

Failure Detect

E-Vision Legend: (M) Monitor, (P) Parameter, (S) Schematic

Comments

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

105 74-2958—1

SrcEconEnCt nvoEcon

(SNVT_switch) value 0 to 100 0 X nvoEcon allows one controller to determine the suitability of outdoor air for

free cooling and share this with other nodes and is typically bound to Econ

on other nodes. If the economizer function is configured by

Config.EconEnable, Econ is periodically calculated from the local sensor

specified by Config.EconEnable and is sent on the network. Econ does not

affect Econ. The output has the following states: If the state is SW_OFF

and the value is 0, then the outdoor air is not suitable for free cooling. If the

state is SW_ON and the value is 100 percent, then the outdoor air is

suitable for free cooling. If the state is SW_NUL and the value is 0, the

corresponding economizer function is not enabled because

Config.EconEnable is ECON_NUL, DIFF_TEMP, or DIFF_ENTH or

because the selected sensor has failed.

SrcEconEnable nvoEcon

(SNVT_switch) state SW_OFF

SW_ON

SW_NUL

0

1

255

SW_NUL M X X For nvoEcon.state, refer to nvoEcon.value.

Table 26. LONMARK®/Open System Points. (Continued)

User Address NvName Field Name Engineering Units: English

(Metric) or States plus Range

Digital State or

Value of State

Default

E-Vision (M, P, S)

Share

Map

Direct Access

Hardware Config.

Manual Config.

Failure Detect

E-Vision Legend: (M) Monitor, (P) Parameter, (S) Schematic

Comments

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

74-2958—1 106

Table 27. Direct Access And Special Points.

User Address NvName Field Name Engineering Units: English

(Metric) or States plus Range

Digital State or

Value of State

Default

E-Vision (M, P, S)

Share

Map

Direct Access

Test

E-Vision Legend: (M) Monitor, (P) Parameter, (S) Schematic

Comments

DestManMode nviManualMode MODE_ENABLE

MODE_DISABLE

MODE_MANUAL

SUPPRESS_ALARMS

UNSUPPRESS_ALARMS

0

1

2

3

4

MODE_ENABLE X X X ManualMode is an input which is used to disable the Excel 10s control algorithms

and to manually set the physical outputs. ManualMode remains unchanged until

another mode has been commanded or an application restart has been performed.

See the Data1.mode for more details.The valid enumerated values are:

MODE_ENABLE enables the node so that the control algorithm determines the

operating mode, and controls the physical outputs. MODE_ENABLE is the default

state after power restore or application restart. If the mode was MANUAL and

nviManualMode is set to MODE_ENABLE, the node then goes through

application_restart.MODE_DISABLE sets the node to the DISABLED_MODE. The

alarm NODE_DISABLED is initiated, all control loops are disabled, and the physical

outputs are turned off. The physical inputs, network variable inputs, and network

variable outputs are still functioning when the node is in the DISABLED_MODE.

MODE_MANUAL sets the node into the MANUAL mode. If MANUAL is selected, the

controller enters Test Mode (manual override of outputs). The alarm

NODE_DISABLED is initiated, all control loops are disabled, and the physical

outputs are controlled manually as commanded by nviManValue. The nodes

configuration variables and nviManValue are used to set valves, dampers, and / or

digital output to the desired manual positions or state(s). The physical inputs,

network variable inputs, and network variable outputs are still functioning when the

node is in the MANUAL mode.SUPPRESS_ALARMS causes nvoAlarm.type to be

set to ALARM_NOTIFY_DISABLED, and AlarmLog to no longer record alarms. If

alarms are suppressed, UNSUPPRESS_ALARMS causes Alarm.type and

AlarmLog to be returned to reporting alarms. See Alarm for more details. All

unspecified values are the same as MODE_ENABLE.

TestMode nviManValue OutDrive NORMAL_OP

OUT_1_ON

OUT_2_ON

OUT_3_ON

OUT_4_ON

OUT_5_ON

OUT_6_ON

OUT_7_ON

OUT_8_ON

ALL_OUT_OFF

ALL_OUT_ON

DISABLE_OUT

0

1

2

3

4

5

6

7

8

9

10

11

NORMAL_OP OutDrive ManValue is used for Factory Testing only.

TestHCPos nviManValue sbManHeatCoolPosS0 percentage

-127 to 127 0 X During MANUAL mode, ManHeatCoolPos sets the modulating position of the

heating or cooling motor (if configured) to the specified position. If ManHeatCoolPos

is less than 0 or greater than 100, the motor is overdriven for a period longer than

the motor time to ensure that it is at the end of travel. The heat motor is driven when

HeatCoolMode is 1 and the cool motor is driven when HeatCoolMode is 0. At the

moment when the node transfers to MANUAL_MODE or HeatCoolMode is changed,

ManHeatCoolPos is set the current motor position.

TestEconPos nviManValue sbManEconPosS0 Percentage

-127 to 127 0 X During MANUAL mode, ManEconPos sets the modulating position of the

economizer motor (if configured) to the specified position. If ManEconPos is less

than 0 or greater than 100, the motor is overdriven for a period longer than the motor

time to ensure that it is at the end of travel. At the moment when the node transfers

to MANUAL_MODE, ManEconPos is set the current motor position.

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

107 74-2958—1

TestHtClStg1 nviManValue HeatCoolStage1 OFF

ON 0

1OFF X During MANUAL mode, HeatCoolStage1 parameters turn the corresponding heat,

or cool stage to on (1) or off (0). When HeatCoolMode is 0, then cooling loads are

controlled. When HeatCoolMode is 1 and the node is controlling conventional

equipment, then heating loads are controlled. When HeatCoolMode is 1 and the

node is controlling a heat pump, then cooling loads are controlled.

TestHtClStg2 nviManValue HeatCoolStage2 OFF

ON 0

1OFF X For HeatCoolStage2, refer to HeatCoolStage1.

TestHtClStg3 nviManValue HeatCoolStage3 OFF

ON 0

1OFF X For HeatCoolStage3, refer to HeatCoolStage1.

TestHtClStg4 nviManValue HeatCoolStage4 OFF

ON 0

1OFF X For HeatCoolStage4. refer to HeatCoolStage1.

TestAuxHt1 nviManValue AuxHeatCoolStage1 OFF

ON 0

1OFF X AuxHeatCoolStage1—During MANUAL mode when the node is configured to

control a heat pump and HeatCoolMode is 1, these parameters turn the

corresponding auxiliary heat stage on (1) or off (0).

TestAuxHt2 nviManValue AuxHeatCoolStage2 OFF

ON 0

1OFF X AuxHeatCoolStage2—During MANUAL mode when the node is configured to

control a heat pump and HeatCoolMode is 1, these parameters turn the

corresponding auxiliary heat stage on (1) or off (0).

TestAuxHt3 nviManValue AuxHeatCoolStage3 OFF

ON 0

1OFF X AuxHeatCoolStage3—During MANUAL mode when the node is configured to

control a heat pump and HeatCoolMode is 1, these parameters turn the

corresponding auxiliary heat stage on (1) or off (0).

TestAuxHt4 nviManValue AuxHeatCoolStage4 OFF

ON 0

1OFF X AuxHeatCoolStage4—During MANUAL mode when the node is configured to

control a heat pump and HeatCoolMode is 1, these parameters turn the

corresponding auxiliary heat stage on (1) or off (0).

TestHtClMode nviManValue HeatCoolMode OFF

ON 0

1OFF X During MANUAL mode, HeatCoolMode determines whether heating or cooling

outputs are turned on or off manually. When HeatCoolMode is 0, then cooling loads

are controlled. When HeatCoolMode is 1 and the node is controlling conventional

equipment, then heating loads are controlled. When HeatCoolMode is 1 and the

node is controlling a heat pump, then cooling loads are controlled by Heat / Cool

stages and heating stages are controlled by auxiliary heat stages. The

CHANGE_OVER_RELAY_OUT is affected by HeatCoolMode as configured in

Select.

TestSaFan nviManValue FanOut OFF

ON 0

1OFF X During MANUAL mode, FanOut turns the fan on (1) or off (0).

TestAuxEcon nviManValue AuxEconOut OFF

ON 0

1OFF X During MANUAL mode, AuxEconOut turns the AUX_ECON_OUT on(1) or off(0).

TestOccStat nviManValue OccStatusOut OFF

ON 0

1OFF X During MANUAL mode, OccStatusOut turns the OCCUPANCY_STATUS_OUT to

on(1 = not OC_UNOCCUPIED) or off (0).

TestFree1 nviManValue Free1Out OFF

ON 0

1OFF X During MANUAL mode, Free1Out turns the FREE1_OUT on(1) or off(0).

TestFree2 nviManValue Free2Out OFF

ON 0

1OFF X During MANUAL mode, Free2Out turns the FREE2_OUT on(1) or off(0).

Table 27. Direct Access And Special Points. (Continued)

User Address NvName Field Name Engineering Units: English

(Metric) or States plus Range

Digital State or

Value of State

Default

E-Vision (M, P, S)

Share

Map

Direct Access

Test

E-Vision Legend: (M) Monitor, (P) Parameter, (S) Schematic

Comments

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

74-2958—1 108

Table 28. Data Share Points.

User Address NvName Field Name Engineering Units: English

(Metric) or States plus Range

Digital State or

Value of State

Default

E-Vision (M, P, S)

Share

Map

Direct Access

Manual Config.

Failure Detect

E-Vision Legend: (M) Monitor, (P) Parameter, (S) Schematic

Comments

DestOaEnth nviOdEnthS7 mA

4 to 20 SI_INVALID X X X nviOdEnth allows one outdoor enthalpy sensor at a node to be shared by many

other nodes. When nviOdEnth is not SI_INVALID then any local sensor is

ignored by the local control algorithm and OdEnth is used instead. If the value is

outside the allowed range (4 to 20 mA), then the node uses the value of the

nearest range limit.

SrcOaEnth nvoOdEnthS7 mA

4 to 20 SI_INVALID M X X nvoOdEnth allows the local outdoor enthalpy sensor to be shared with other

nodes and is typically bound to OdEnth on other nodes. If the local sensor is

configured by Select, nviOdEnth is periodically sent on the network. If the local

sensor is not configured or currently showing an error, the value is SI_INVALID.

SrcMonSwCt nvoMonSw value 0 to 100 0 X MonSw value allows the monitor switch to be shared with another node. MonSw

is typically bound to an SBC to indicate a user defined alarm condition. The

output values have the following meanings: If the state is SW_OFF and the

value is 0, then the monitor switch is open. If the state is SW_ON and the value

is 100 percent, then the monitor switch is closed. If the state is SW_NUL and

the value is 0, then the monitor switch is not configured by Select.

SrcMonSw nvoMonSw state SW_OFF

SW_ON

SW_NUL

0

1

255

SW_NUL M X For MonSw.state, refer to MonSw.value.

nviIaqOvr value 0 to 100 0 IaqOvr allows an indoor air quality sensor to be shared by many other nodes.

The states are follows: If the state is SW_OFF and the value is don’t care, then

the indoor air quality is acceptable. If the state is SW_ON and the value is 0,

then the indoor air quality is acceptable. If the node receives this combination of

state and value, then state is set to SW_OFF. If the state is SW_ON and the

value is not zero, then the indoor air quality is not acceptable and additional

outdoor air is needed to bring it back to acceptable. If the state is SW_NUL and

the value is don’t care, then the indoor air quality is acceptable. If the state is

other, then the network variable is not bound, the communications path from the

sending node has failed, or the sending node has failed. The indoor air quality is

acceptable.

DestIaqOvrd nviIaqOvr state SW_OFF

SW_ON

SW_NUL

0

1

255

SW_NUL M X X X X For IaqOvr.state, refer to IaqOvr.value.

SrcIaqOvrCt nvoIaqOvr value 0 to 100 0 X X IaqOvr allows an indoor air quality sensor to be shared with other nodes and is

typically bound to IaqOvr on other nodes. If Data2.siSpaceCo2 is not

SI_INVALID, and exceeds Aux1SetPt.CO2IaqLimit, then poor air quality is

detected. In addition, if a local digital input is configured for IAQ_OVERRIDE_IN

and IO.IaqOverRide is 1 (TRUE) then poor air quality is also detected. The state

has the following meanings: If the state is SW_OFF and the value is 0, then the

indoor air quality is acceptable. If the state is SW_ON and the value is 100

percent, then the indoor air quality is not acceptable and additional outdoor air is

needed to bring it back to an acceptable state. If the state is SW_NUL and the

value is 0, then the economizer for this node has not been configured or there is

no sensor (via IO.SpaceDo2 or IO.IaqOverRide) configured or the only

configured sensor (via IO.SpaceCo2) has failed.

SrcIaqOvr nvoIaqOvr state SW_OFF

SW_ON

SW_NUL

0

1

255

SW_NUL M X X For IaqOvr.State, refer to IaqOvr.value.

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

109 74-2958—1

Appendix D. Q7750A Excel 10 Zone Manager

Point Estimating Guide.

Memor

y

size approximation is shown below:

(

all sizes in

b

y

tes

)

When

memory size

is less than 110,000 b

y

tes, the size is OK.

When

memory size

is between 110,000 and 128,000 b

y

tes,

the application ma

y

be too lar

g

e. The user must expect to

reduce the application complexit

y

, reduce the number of

attached Excel 10s or distribute the Excel 10s over more than

one Zone Mana

g

er.

When

memory size

is

g

reater than 128,000, the size is too

lar

g

e. The application size must be reduced as described

above.

Approximate Memory Size Estimating Procedure.

1. Determine the number of points per controller re

q

uired

at the Central

(

for example, XBS

)

.

NOTE: All remainin

g

points that are not mapped can

be accessed throu

g

h the

Direct Access

feature.

2. Calculate the number of Excel 10 Zone Mana

g

er pro-

g

ram points that are used in control lo

g

ic and in the

switchin

g

table.

3. Estimate the pro

g

ram complexit

y

of the Zone Mana

g

er

(

one of three levels

)

.

a. No time pro

g

rams, control lo

g

ic, or switchin

g

tables.

b. 10K of control lo

g

ic

(

one time pro

g

ram, five

switchin

g

tables, and five control loops

)

.

c. 20K of control lo

g

ic

(

multiple time pro

g

rams, ten

switchin

g

tables, and ten control loops

)

.

Use Fi

g

. 51 to determine the number of Excel 10s that

can be connected to the Zone Mana

g

er.

NOTE: More than 60 Excel 10s re

q

uires a Router.

4. Repeat for each Q7750A Excel 10 Zone Mana

g

er in a

pro

j

ect.

Fig. 51. Point capacity estimate for Zone Manager.

The exact e

q

uation for calculatin

g

memor

y

size follows:

Memor

y

size = 21,780

+ 4096

(

in case of a time pro

g

ram

)

.

+ CARE Control Pro

g

ram.

+ 14 x time points x Excel 10 units.

+ 50 x Excel 10 units.

+ map complexit

y

x Excel 10 units x mapped points.

+ 57 x C-Bus points.

+ 7488 x Excel 10 t

y

pes.

Where:

Time points = number of switch points in time pro

g

ram

per Excel 10.

Excel 10 units =number of attached Excel 10s.

C-Bus points = includin

g

mapped points and others; for

example, remote points.

Mapped points = number of mapped points per Excel 10,

includin

g

One-to-Man

y

and

Man

y

-to-One mechanism.

Excel 10 t

y

pes = number of different Excel 10 t

y

pes

(

currentl

y

three

)

Map complexit

y

=

20 =usin

g

One-to-Man

y

and not usin

g

points

with read/write.

30 = avera

g

e.

45 = man

y

points with read/write abilit

y

.

20 60 120

600

700

800

900

600

700

800

900

920

765

610

585

740

895

NUMBER OF

C-BUS POINTS

(EXCEL 10

MAPPED

POINTS

PLUS ZONE

MANAGER

POINTS)

(OR LESS) (ADD ROUTER)

NUMBER OF EXCEL 10s

(C)

(A)

NUMBER OF

C-BUS POINTS

(EXCEL 10

MAPPED

POINTS

PLUS ZONE

MANAGER

POINTS)

NO TIME PROGRAM,

NO CONTROL LOOPS,

NO SWITCHING TABLES.

20K CONTROL PROGRAM

(I.E., MULTIPLE TIME PROGRAMS,

10 CONTROL LOOPS,

10 SWITCHING TABLES.)

10K CONTROL PROGRAM

(FOR EXAMPLE,

1 TIME PROGRAM,

5 CONTROL LOOPS,

5 SWITCHING TABLES.)

(B)

M8729

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

74-2958—1110

Appendix E. Sensor Data for Calibration.

Resistance Sensors.

Sensor Type:

C7100A,

(

and C7170A

)

Sensor Use:

Dischar

g

e air, Outdoor air

Table 29 lists the points for Sensor Resistance versus

Temperature. Fi

g

. 52 shows the

g

raph of these points.

Table 29. Sensor Resistance Versus Temperature.

Fig. 52. Graph of Sensor Resistance versus Temperature.

Sensor Type:

C7031B1033, C7031C1031 C7031D1062, C7031F1018

(

W7750B,C onl

y)

, C7031J1050, C7031K1017

Sensor Use:

Return Air, Dischar

g

e Air Temperature

Table 30 lists the points for Sensor Resistance versus

Temperature. Fi

g

. 53 shows the

g

raph of these points.

Table 30. Sensor Resistance Versus Temperature.

Fig. 53. Graph of Sensor Resistance versus Temperature.

Sensor Type:

T7770A,B,C,D the T7560A,B and C7770A

Sensor Use:

Space Temperature and Dischar

g

e/Return Air Temperature

Table 31 lists the points for Sensor Resistance versus

Temperature. Fi

g

. 54 shows the

g

raph of these points.

°FResistance Ohms

-40 2916.08

-30 2964.68

-20 3013.28

-10 3061.88

0 3110.48

10 3159.08

20 3207.68

30 3256.28

40 3304.88

50 3353.48

60 3402.08

70 3450.68

80 3499.28

90 3547.88

100 3596.48

110 3645.08

120 3693.68

3050

3000

2950

2900

3100

3150

3200

3250

3300

3350

3400

3450

3500

3550

3600

3650

3700

3750

50403020100-10-20-30-40 60 70 80 90 100 110 120

OHMS

DEGREES F

SENSOR RESISTANCE VERSUS TEMPERATURE

M11615

°FResistance Ohms

30 1956.79

35 1935.79

40 1914.79

45 1893.79

50 1872.79

55 1851.79

60 1830.79

65 1809.79

70 1788.79

75 1767.79

80 1746.79

85 1725.79

90 1704.78

95 1683.78

100 1662.78

105 1641.78

110 1620.78

115 1599.78

120 1578.78

1650

1600

1550

1500

1700

1750

1800

1850

1900

1950

2000

555045403530 60 65 70 75 80 85 90 95 100 105 110 115120

OHMS

DEGREES F

SENSOR RESISTANCE VERSUS TEMPERATURE

M11614

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

111 74-2958—1

Table 31. Sensor Resistance Versus Temperature.

Fig. 54. Graph of Sensor Resistance versus Temperature.

Sensor Type:

T7770B,C 10K ohm setpoint potentiometer

(

Relative

)

Sensor Use:

Offset Setpoint Temperature

Table 32 lists the points for Sensor Resistance versus

Temperature. Fi

g

. 55 shows the

g

raph of these points.

Table 32. Sensor Resistance Versus Temperature.

Fig. 55. Graph of Sensor Resistance versus Temperature.

Sensor Type:

T7770B,C 10 K ohm setpoint potentiometer

(

Absolute

)

Sensor Use:

Direct Setpoint Temperature

Table 33 lists the points for Sensor Resistance versus

Temperature. Fi

g

. 56 shows the

g

raph of these points.

Table 33. Sensor Resistance Versus Temperature.

°F Resistance Ohms

40 9961.09

45 9700.90

50 9440.72

55 9180.53

60 8920.35

65 8660.16

70 8399.98

75 8139.79

80 7879.61

85 7619.42

90 7359.24

95 7099.06

100 6838.87

°F Above and Below Setpoint Resistance Ohms

-9 8877.41

-8 8832.14

-7 8786.87

-6 8741.60

-5 8696.33

TEMPERAT

U

RE

(

DE

G

REE

S)

oF

30 40 50 60 70 80 90 100 110

010 20 30 40

RESISTANCE (OHMS)

20K OHM AT

77oF (25oC)

80K

70K

60K

50K

40K

30K

20K

10K

oC

M5874A

-4 8651.06

-3 8605.79

-2 8560.52

-1 8515.25

0 8469.98

1 8424.71

2 8379.45

3 8334.18

4 8288.91

5 8243.64

6 8198.37

7 8153.10

8 8107.83

9 8062.56

°F Resistance Ohms

55 8877.42

60 8741.62

65 8605.82

70 8470.02

75 8334.22

80 8198.42

85 8062.62

°F Above and Below Setpoint Resistance Ohms

8000

8100

8200

8300

8400

8500

8600

8700

8800

8900

9876543210-1-2-3-4-5-6-7-8-9

OHMS

DEGREES F

SENSOR RESISTANCE VERSUS TEMPERATURE

M11609

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

74-2958—1112

Fig. 56. Graph of Sensor Resistance versus Temperature.

Voltage/Current Sensors.

Sensor Type:

C7600B1000 2 to 10V

(

Decorative Wall Mount

)

Sensor Use:

Humidit

y

Table 34 lists the points for Sensor Volta

g

e versus Humidit

y

.

Fi

g

. 57 shows the

g

raph of these points.

Table 34. Sensor Voltage Versus Humidity.

Fig. 57. Graph of Sensor Voltage versus Humidity.

Sensor Type:

C7600C

(

4 to 20 mA

)

Sensor Use:

Humidit

y

Table 35 lists the points for Sensor Volta

g

e versus Humidit

y

.

Fi

g

. 58 shows the

g

raph of these points.

Table 35. Sensor Voltage Versus Humidity.

Fig. 58. C7600C output current vs. humidity.

Sensor Type:

T7400A1004

Sensor Use:

Enthalp

y

Humidity Percentage Sensor Voltage

10 2.67

15 3.08

20 3.48

25 3.88

30 4.28

35 4.68

40 5.08

45 5.48

50 5.88

55 6.28

60 6.69

65 7.09

70 7.49

75 7.89

80 8.29

85 8.69

90 9.09

8000

8100

8200

8300

8400

8500

8600

8700

8800

8900

55 60 65 70 75 80 85

OHMS

DEGREES F

SENSOR RESISTANCE VERSUS TEMPERATURE

M11608

Relative Humidity Percentage Sensor Voltage

10 5.6

20 7.2

30 8.8

40 10.4

50 12.0

60 13.6

70 15.2

80 16.8

90 18.4

2.50

3.00

3.50

4.00

4.50

5.00

5.50

6.00

6.50

7.00

7.50

8.00

8.50

9.00

9.50

10.00

10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90

VOLTS

PERCENTAGE

SENSOR VOLTAGE VERSUS HUMIDITY PERCENTAGE

M11610

HUMIDITY IN PERCENT RELATIVE HUMIDITY

CURRENT IN MILLIAMPS

4

18

8

16

6

14

12

20

10

10

M3131B

5.6

7.2

8.8

10.4

12.0

13.6

15.2

16.8

18.4

10

20

30

40

50

60

70

80

90

20 10090807060504030

RH (%) I (mA)

0

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

113 74-2958—1

Table 36 lists the points for Sensor Current versus Enthalp

y

(

volts

)

. Fi

g

. 59 shows the

g

raph of these points.

Table 36. Sensor Current Versus Enthalpy (volts).

Fig. 59. Graph of Sensor Current versus Enthalpy (volts).

See Fi

g

. 60 for partial ps

y

chometric chart for a C7400A Solid

State Enthalp

y

Sensor.

Enthalpy (mA) Sensor Current

41

51.25

61.49

71.74

81.99

92.24

10 2.49

11 2.74

12 2.99

13 3.24

14 3.49

15 3.74

16 3.98

17 4.23

18 4.48

19 4.73

20 4.98

1.00

1.25

1.50

1.75

2.00

2.25

2.50

2.75

3.00

3.25

3.50

3.75

4.00

4.25

4.50

4.75

5.00

4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20

ENTHALPY (VOLTS)

(MA)

SENSOR CURRENT VERSUS ENTHALPY (VOLTS)

M11607

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

74-2958—1114

Fig. 60. Partial psychometric chart for a C7400A Solid State Enthalpy Sensor.

See Fi

g

. 61 for a C7400A Solid State Enthalp

y

Sensor output

current vs. relative humidit

y

.

Fig. 61. C7400A Solid State Enthalpy Sensor output

current vs. relative humidity.

Sensor Type: T7242 or e

q

uivalent

CONTROL

CURVE

A

B

C

D

CONTROL POINT

APPROX. °F (°C)

AT 50% RH

73 (23)

70 (21)

67 (19)

63 (17)

12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46

90

100

80

70

60

50

40

30

20

10

ENTHALPY—BTU PER POUND DRY AIR

85

(29) 90

(32) 95

(35) 100

(38) 105

(41) 110

(43)

35

(2)

35

(2)

40

(4)

40

(4)

105

(41) 110

(43)

45

(7)

45

(7)

50

(10)

50

(10)

55

(13)

55

(13)

60

(16)

60

(16)

65

(18)

65

(18)

70

(21)

70

(21)

75

(24)

75

(24)

80

(27)

80

(27)

85

(29) 90

(32) 95

(35) 100

(38)

APPROXIMATE DRY BULB TEMPERATURE—°F (°C)

A

A

B

B

C

C

D

D

M11160

RELATIVE HUMIDITY (%)

1

1

HIGH LIMIT CURVE FOR W6210D,W7210D.

20

10

30

40

50

60

70

80

90

100

605040 70 80 90 100

PERCENT RH

TEMPERATURE °F (°C)

M11605

C7400A OUTPUT CURRENT

4 mA

6 mA

8 mA

10 mA

20 mA

18 mA

16 mA

14 mA

12 mA

(4) (10) (16) (21) (27) (32) (38)

DC BA

D = 17 MA

C = 15.5 MA

B = 13.5 MA

A = 11 MA

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

115 74-2958—1

Sensor Use:

CO2 concentration

Table 37 lists the points for Sensor Volta

g

e versus CO2

concentration. Fi

g

. 62 shows the

g

raph of these points.

Table 37. Sensor Voltage Versus CO2 Concentration.

Fig. 62. Graph of Sensor Voltage versus CO2

concentration.

Sensor Type:

Third part

y

(

2 to 10V

)

Sensor Use:

Monitor volta

g

e

Table 38 lists the points for Sensor Volta

g

e versus input

Volta

g

e to A/D. Fi

g

. 63 shows the

g

raph of these points.

Table 38. Sensor Voltage Versus Input Voltage To A/D.

Fig. 63. Graph of Sensor Voltage versus input Voltage to

A/D.

Sensor Type:

Third part

y

Sensor Use:

Sensor Volta

g

e

(

Vdc

)

/Pressure

(

Inw

)

2 to 10V, 0 to 5 inw

(

1.25 kPa

)

Table 39 lists the points for Sensor Volta

g

e

(

Vdc

)

versus

Pressure

(

Inw

)

. Fi

g

. 64 shows the

g

raph of these points.

CO2 Concentration PPM Sensor Voltage

00.00

100 0.50

200 1.00

300 1.50

400 2.00

500 2.50

600 3.00

700 3.50

800 4.00

900 4.50

1000 5.00

1100 5.50

1200 6.00

1300 6.50

1400 7.00

1500 7.50

1600 8.00

1700 8.50

1800 9.00

1900 9.50

2000 10.00

0

1

2

3

4

5

6

7

8

9

10

100 300 500 700 900 1100 1300 1500 1700 1900

200 400 600 800 1000 1200 1400 1600 1800 2000

VOLTS

PPM

SENSOR VOLTAGE VERSUS CO2 CONCENTRATION

M11611

Voltage to A/D Sensor Voltage

0.00 0.00

0.50 0.25

1.00 0.50

1.50 0.75

2.00 1.00

2.50 1.25

3.00 1.50

3.50 1.75

4.00 2.00

4.50 2.25

5.00 2.50

5.50 2.75

6.00 3.00

6.50 3.25

7.00 3.50

7.50 3.75

8.00 4.00

8.50 4.25

9.00 4.50

9.50 4.75

10.00 5.00

0

0.50

1.00

1.50

2.00

2.50

3.00

3.50

4.00

4.50

5.00

1000 300 500 700 900200 400 600 800 1000

A/D VOLTS

VOLTS

SENSOR VOLTAGE VERSUS INPUT VOLTAGE TO A/D

M11612

Home and Building Control Home and Building Control Home and Building Control Products

Honeywell Inc. Honeywell Limited-Honeywell Limitée Honeywell AG

Honeywell Plaza 155 Gordon Baker Road Böblinger Straße 17

P.O. Box 524 North York Ontario D-71101 Schönaich

Minneapolis, MN 55408-0524 M2H 3N7 Phone (49-7031) 637-01

Fax (49-7031) 637-493

Printed in U.S.A. on recycled

paper containing at least 10%

post-consumer paper fibers.

74-2958—1 J.D. Rev. 3-00 www.hone

y

well.com

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

Table 39. Sensor Voltage (Vdc) Versus Pressure (Inw).

Fig. 64. Graph of Sensor Voltage (Vdc) versus Pressure

(Inw).

LON



, Neuron



, and LONWORKS



are registered trademarks

of Echelon



Corporation. LONMARK



and LONMARK



logo are

registered trademarks of the LONMARK Interoperability

Association.

Pressure Inw (kPa) Sensor Voltage (Vdc)

0.00

(

0.00

)

2.00

0.50.

(

0.13

)

2.80

1.00

(

0.25

)

3.60

1.50

(

0.37

)

4.40

2.00

(

0.5

)

5.20

2.50

(

0.62

)

6.00

3.00

(

0.75

)

6.80

3.50

(

0.87

)

7.60

4.00

(

1.00

)

8.40

4.50

(

1.12

)

9.20

5.00

(

1.25

)

10.00

2.00

3.00

4.00

5.00

6.00

7.00

8.00

9.00

10.00

0 0.50 1.00 1.50 2.00 2.50 3.00 3.50 4.00 4.50 5.00

VOLTS (VDC)

INW

SENSOR VOLTAGE VERSUS PRESSURE

M11606