CARRIER Air Conditioner/heat Pump(outside Unit) Manual L0601181

User Manual: CARRIER CARRIER Air conditioner/heat pump(outside unit) Manual CARRIER Air conditioner/heat pump(outside unit) Owner's Manual, CARRIER Air conditioner/heat pump(outside unit) installation guides

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Page Count: 72

40UV, UH050-200

Unit Ventilators

with Product Integrated Control (PIC)

Installation, Start-Up and Service Instructions

CONTENTS

Page

SAFETY CONSIDERATIONS ............................ ]

INTRODUCTION ...................................... ],2

PREINSTALLATION ..................................... 1

Unpack and Inspect Units .............................. ]

Protect Units From Damage ............................ t

Prepare Jobsite for Unit Installation .................... I

Identify and Prepare Units ............................. 2

PHYSICAL DATA........................................ 2

INSTALLATION ...................................... 2-24

Placing Vertical Units in Position ....................... 2

Placing Horizontal Units in Position .................... 2

Make Piping Connections ............................... 8

Make Electrical Connections ............................ 8

Actuators (Field-Supplied) .............................. 8

Make Duct Connections .............................. 23

Make Final Preparations .............................. 24

PRODUCT INTEGRATED CONTROL ................ 24-46

Physical Characteristics .............................. 24

Unit Ventilator Comfort Control Module

Installation and Field Wiring ........................ 27

Sensors .............................................. 29

Carrier Comfort Network_ Interface .................. 38

Relays ................................................ 39

Actuators ............................................. 39

Direct Expansion (DX) Cooling ........................ 41

DX System Design .................................... 41

Electric Heat .......................................... 42

Remote Start ......................................... 42

Fire/Smoke Status Input .............................. 42

Valves ................................................ 43

SET-UP, CONFIGURATION, AND

OPERATION ...................................... 46-49

START-UP ............ ................................. 50

SERVICE ............................................ 50-66

Preventing Excessive Condensation on Unit.......... 50

Check Drain .......................................... 50

Fan Motor Bearings ................................... 50

Fan Shaft Ball Bearing ................................ 50

Clean Fan Wheel ...................................... 50

Clean or Replace Air Filters ........................... 50

ECM Motor Removal and Reinstallation ............... 50

Blower Assembly Section Removal

and Reinstallation .................................. 52

Coil Assembly Removal and Reinatallation ........... 53

Ball Bearing Replacement ............................ 57

Blower Wheel Removal and Reinstallation ............ 62

Sleeve Bearing Replacement ......................... 63

Damper Section Removal and Reinatallation .......... 65

TESTING ............................................ 67-71

Water Valve Tests ..................................... 67

Face and Bypass Damper Tests ...................... 67

Dampers ..............................................

Fan Tests ............................................. 68

Filter Maintenance .................................... 68

Remote Start Input .................................... 68

Sensors .............................................. 68

Fire Shutdown Option ................................ 68

Electric Heat and Direct Expansion Cooling .......... 68

Mixed-Air Damper Sensors Final Calibration .......... 69

Testing Completion ................................... 69

Unit Diagnostics and Troubleshooting ................ 69

SAFETY CONSIDERATIONS

Installation and servicing of this unit can be hazardous due

to system pressure, electrical components and equipment

location (such as a ceiling or elevated structare). Untrained

personnel can perform the basic maintenance functions of

replacing fdters. Only trained and qualified service personnel

should perform all other operations.

When installing this unit, observe precautions in the litera-

ture, tags and labels attached to the equipment, and any other

safety precautions that may apply.

• Follow all safety codes.

• Wear safety glasses and work gloves.

• Use care in handling and installing this accessory.

• Use quenching cloth for all brazing operations.

• Have fire extinguisher available for all brazing

operations.

Before perfomamg service or maintenance operations, tam

off main power switch to the mill Electrical shock could

cause personal injury.

INTRODUCTION

This document contains general installation instructions for

the 40U_,UH unit ventilators and information and _couble-

shooting of the Product Integrated Control (PIC) option.

See submittal drawings for unit configurations, dimensions,

clearances, and pipe connections. Refer to unit wiring label for

all electrical connections; follow NEC (National Electrical

Code) and local codes.

PREINSTALLATION

Unpack and Inspect Units- Remove shipping wraps

from all units. Check the shipment against shipping order. If

shipment is damaged or incomplete, file claim with transporta-

tion company and advise Carrier immediately.

Protect Units From Damage -- To maintain war-

ranty, protect units against adverse weather, theft, vandalism,

and debris on jobsite. Do not allow foreign material to fall into

drain pan. Prevent dust and debris from being deposited on

motor and fan wheels.

If the equipment is stored for any length of time before in-

stallation, it should remain in its shipping container in a clean,

dry, and climate controlled area.

Prepare Jobsite for Unit Installation -- To save

time and to reduce the possibility of costly errors, set up a com-

plete sample installation in a typical room at jobsite. Check all

critical dimensions such as pipe, wire, and duct connection

requirements. Refer to job drawings and product dimension

drawings as required. Insmlct all Wades in their part of the

installation.

Manufacturer reserves the Hght to discontinue, or change at any 11me,specifications or designs wi_out notice and without incurring obligatlot_.s.

Book 3 Catalog No 534-094 Printed in U.S.A. Form 40UV, UH-6SI Pg 1 7-05 Replaces: 40UV, UH-3SI

Identify and Prepare Units

1. Be sure power requirements match available power

source. Refer to the unit nameplate and wiring diagram.

2. Remove front (40UV) or bottom (40UH) access panels

from the unit. Retain the 5/32-in. socket bead fastcners and

panels for minstallation later.

3. Rotate the fan shaft by hand to ensure that fans are

unresWicted and can rotate freely. Check for shipping

damage and fan obstructions.

PHYSICAL DATA

Component weight data of 40UV, LrH units is provided in

Table I.

INSTALLATION

Units must be installed level and plumb. Failure to do so

may result in excessive vibration and/or premature failure.

Placing Vertical Units in Position

l. Select the unit location; ensure that service clearance is

provided. Allow enough grille clearance to maintain

unrestricted airflow. See submittal drawings and Fig. 1

and 2 for dimensions.

2. Make sore wall behind unit is smooth and plumb; ff

necessary, install furring strips on walls with irregular

surfaces or mullions. Furring strips must be positioned

behind mounting holes in unit. Fasteners, furring strips,

and other seals (if required) must be field supplied.

3. Remove all wall and floor moldings from behind the unit-

4. Move unit into position. Unit must be snug against wall

and furring strips.

5. Adjust unit leveling legs so unit is level. Unit must be

level for proper operation and condensate drainage.

6. Using field-supplied fasteners, reach into unit and attach

unit to the wall using the 3/4 in. mounting holes in the

back panel.

7. Protect the unit from jobsite debris. Do not allow foreign

material to fall into drain pan. Prevent dust and debris

from being deposited on motor or fan.

Placing Horizontal Units in Position

l. Select the unit location; ensure that service clearance is

provided. Allow enough grille clearance to maintain ura'e-

stricted airflow. Make sure that ceiling is able to support

the weight of the unit. See Fig. 3-5 for nominal unit weight.

See submittal drawings and Fig. 3_5 for dimensions.

NOTE: See page 23 for additional requirements for units

ducted to multiple openings.

2. Ensure that bottom panels have been removed from unit_

When unit is lifted, access to the 3/4in. mounting holes is

through the bottom of the unit- Hanger rods and fasteners

and other required hardware must be field supplied.

3. Using a forklift or other mechanical lifting device, raise

the unit to the mounting position. If forklift or other

lifting device is likely to contact a painted wall surface,

protect the surface as necessary.

4. Use rods and fasteners to suspend the unit at the mounting

holes on the top of the unit. The unit must be suspended at

the 3/4in. mounting holes; do not use any other locations.

5. If desired, install field-supplied vibration isolators. Adjust

isolators so unit is uniformly suspended and pitched.

6. To ensure proper drainage and operation, ensure unit is

level and tighten all fasteners. DO NOT mount the unit

on a slope. Pitch of horizontal suspended units can

change after coil is filled; recheck after filling coil.

7. Protect the unit from jobsite debris. Do not allow foreign

material to fail into drain pan. Prevent dust and debris

from being deposited on motor or fan.

Table I -- Physical Data

UNIT 40UV, UR 050* 075 100 125 150 200"

NOMINAL AIRFLOW (CIm) 500 750 1000 1250 1500 2000

FANS

Quantity 1 2 3 4 5 5

Diameter (in.I 0.32 8.32 8.32 8.32 8.32 9.5

Width On-) 8 8 88 8 6

RLTERS

Rom,=,s .llo l,,nasokI ,.x301 .

Romthal Size •t_in_ 2in_ thlOkn 9 x 241/4 9x36 l& 9x 481/4 9 x 601/4 9 x 721/+ 9 x731/4

Quantity 1 1 1111

40UV ERIPPING WEIGHT _

(Appfox Ib)

16Sla in. Deep Unit 330 400 480 590 660 --

21_1e In. Deep Unit 340 410 499 605 6/5 --

40UH SHIPPING WEIGHT'*

(Appro_ 1t3)

30Vz In. Deep Unit -- 420 500 620 690 --

36 In. Deep Unit -- 500 600 740 830

40 In. Deep Unit -- 530 640 790 880 1020

44 in. Deep Unit ..... 1050

40UV INSTALLED WEIGHT**

(Approx Ib

16s/+ in. Deep Unit 315 380 460 570 640 --

217/s In. Deep Unit 325 390 470 595 655 --

40UH INSTALLED WEIGHT**

(Approxth)

30V= In. Deep Unit -- 405 480 600 670 --

36 in. Deep Unit -- 485 580 720 810

40 in. Deep Unit -- 515 620 770 860 1_)00

44 in. Deep Unit ..... 1030

COil_ WATER WEIGHT

(Approx Ib per row of coil) 1 .O 1.5 2.0 2.4 2.7 27

COB. CONr4_i iur_S (in. OD) Return Supply

Water Coils with 1 to 5 Rows _/8 7,s

Steam Coils (All Units) 7/a 11/a

Suction LJquid

DX Coils 7/e 3/a

LEGEND "4OUV only,

DX -- Direct Expansion 1"40UH 40 and 44 in. deep units onnly..

_Weight based on damper_ordro|led unit with 5-row coil and factory-fastalled

controls.

REMOVABLE BOTFOM PANEL

.78 _ 10.61 _(EACHEND)

(_'P)_I I _

12.37F.... if r.... _ t

r 522 +opwEw 2°OCK

DISCHARGE GRILLE

1.00

(UNIT SHOWN

WITH 1,00" END

PANELS)

CCN

CONTROLLER

(OPTIONAL)

FRONT SERVICE

PANELS

(SEE NOTE 3)

----9

(SEE NOTE 2)

12.10 (TYp)

]_--J

,/J ................................... .,.

FRONT VIEW

_# TUNNEL-_

L200 L

r-_ ELECTRICAL

--J ,"4 _BOX

_4 NON-FUSED

LJ _ DISCONNECT

SWITCH

2.08 13.ooF

--RECESSED RETURN

AIR/KICK PANEL RIGHT SIDE VIEW

8.08 REMOVABLE PANEL

(TYP-SEE ( EACH END)

NOTE 2) PIPE TUNNEL_

7.04GYP)

1.54 (TYP) 3 ACCESS

OPEN[NG

(EACH END)

7.00(TYp)

18.25

(_ 25

(MOUNTING

HOLES-TYP-

4 PLACES)

L _--OUTSIDE AIR

OPENING

4.50 .90

REAR VIEW

22.00

L 2.00

(TYP)

6.75 (TYP) LEGEND

CCN -- Carrier Comfort Network_

UNIT AIRFLOW DIMENSIONS(in.

40UV (cfm) Wl W2 W3

050 500 50 24 16.60

075 750 62 36 31,67

100 1000 74 48 46.74

125 1250 86 60 61,81

150 1500 98 72 78.47

APPROXIMATE

SHIPPING

WEIGHT (Ib)

330

400

480

590

660

APPROXIMATE

INSTALLED

WEIGHT (Ib)

315

380

480

570

640

NOTES:

1. All dimensions are in inches.

2. Dimension does not include end panets.

3. Three front panels provided for service access.

4. Motor and electrical power input box on right side of

unit. Box includes fan speed switch. OrdOff switchand

non-fused disconnect switch.

5. Connection hand is determined by facing discharge of

unit.

Fig. 1 -- 40UV Dimensions -- 16s/e-in. Deep Units

(Standard)

5.98

ITS)--

12.37

5Z_

2.08

1.00

(UNIT SHOWN

WITH 1.00" END

PANELS)

CCN

CONTROLLER

(OPTIONAL)

FRONT SERVICE

PANELS

(SEE NOTE 3)

j s

5.22 TOP VIEW _BARSTOCK

DISCHARGEGRILLE

(SEE NOTE2)

12.00 _FY'P) /

7-J=

/................................. iii

FRONT VIEW

--MOTOR 2.404_. _

1.7

_--2oo I 7_ ; ;

ELECTRICAL II

Fsox 14:

NON-FUSED _//J -

DISCONNECT

SSWlTCH

PIPINGL_

L TUNNE __

-RECESSED RETURN

AIR/KICKPANEL END VIEW

REMOVABLE PANEL

B.08 (EACH END) 7.04 (TYP)

NOTE 2) CCESS

OPENING

(EACH END)

18.25

,75

(MOUNTING

HOLE_-TYP*

4PLACES)

OUTSIDE AIR

OPENING

4.50

REAR VIEW

LEGEND

CCN -- Carrier Comfort Network_

UNIT AIRFLOW DIMENSiONS(in.)

40UV (cfm) Wl W2 W3

050 500 50 24 16.60

075 750 62 36 31,67

100 1000 74 48 48.74

125 1250 86 60 61.81

150 1500 98 72 78.47

APPROXIMATE

SHIPPING

WEIGHT (Ib)

340

410

490

605

675

APPROXIMATE

INSTALLED

WEIGHT (Ib)

325

390

470

595

655

NOTES:

1. All dimensions are in inches.

2. Dimension does not include end panels.

3. Three _ont panels provided for service access.

4. Motor and electrical power input box on right side

of unit. Box includes fan speed switch, On/Off

switch and non-fused disconnectswitch.

5. Connection hand is determined by facing dis-

charge of unit.

Fig. 2 --40UV Dimensions -- 2171a-in.Deep Units

(With Piping Chase)

30.50

LEFT SIDE VIEW

loo_L

(UNIT SHOWN

WITH 1,00" END

PANELS)

CCN

CONTROLLER

(OPTIONAL)

BOTFOM SERVICE

PANELS

(SEE NOTE 3)

FRONTVIEW DISCHARGE GRILLE

(OPTIONAL)

(SEE NOTE 2)

r-Z,_

(mmmmmlmL

BOTTOM VIEW

FMOTOR

;

JL_ 2.00

ELECTRICAL

BOX

_NON-FUSED

DISCONNECT

SWITCH

--_ RL-I-URN AIR

LOUVERED PANEL

(OPTIONAL)

8.0S

(TYP-SEE REMOVABLE PANEL

NOTE 2) (EACH END) 1.54

(TYp)

18.25 17.50

(_.75

(MOUNTING --

HOLES-TYP-

4 PLACES)

OUTSIDE AIR

OPENING

4.50

TOP VIEW

2.50

(TYP)

6.75 (TYp)

LEGEND

CCN -- Carrier Comfort Network_

2.27 W2 3 00

5me0I\ l+

\ --REAROUTS,DEm

__:E?OP N' N(OPT'ONAL'L__5.76

AIR OPENING (OPTIONAL)

REAR VIEW

UNIT AIRFLOW DIMENSIONS(in.) APPROXIMATE

SHIPPING

40UH (cfm) Wl W2 W3 WEIGHT (Ib)

075 750 62 36 31.67 420

100 1000 74 48 46.74 500

125 1250 86 60 61.81 620

150 1500 98 72 78.47 690

APPROXIMATE

INSTALLED

WEIGHT (Ib!

405

480

6OO

670

NOTES:

1. All dimensions are in inches.

2, Dimension does not include end panels.

3. Two bottom panels provided for service access.

4. Motor and electrical power input box on right side of

unit. Box includesfan speed switch. On/Off switch and

non-fused disconnectswitch.

5. Connection hand is determined by facing discharge of

unit.

Fig. 3 -- 40UH Dimensions -- 301/2-in. Deep Units

_36.00

LEFT SIDE VIEW

(SIZES 075 TO 150)

1.00

(UNIT SHOWN

WITH 1.00"

I--4- 750

4.OO END PANELS)

LEFT SIDE VIEW

(SIZE 200)

CCN

CONTROLLER

(OPTIONAL)

BOTTOM SERVICE

PANELS

(SEE NOTE 3)

II IIl_lllllll_lllllllll_Jlrll| 15.5 3

II IIIIl_llllllllllllllllllFJl|

;............ II ......... ,,,,,

W5 W3 (OPENING) (TO OPENING)

(OPENING) FRONT VIEW DOUBLEDEFLECTION

DISCHARGE GRILLE

(OPTIONAL)

(SEE NOTE 2)

- ELECTRICAL

BOX

RETURNAIR _/

LOUVEREDPANEL NON-FUSED

(OPTIONAL) DISCONNECT

BO'I-rOM VIEW SWITCH

8.00

NOTE 2)

REMOVABLE PANEL

(EACH END)

g_.75

-- (MOUNTING HOLES-

TYP-4 PLACES)

W4 17.50

LEGEND

CCN- Carrier Comfort Network_

3.67

(ryP)

2.50

(TYp)

UNIT AIRFLOW DEPTH

40UH (ofm) (in.)

075 750 36

100 1000 36

125 1250 36

150 1500 35

200 2OOO 40

DIMENSIONS (in.) APPROXIMATE

SHIPPING

Wl W2 W3 W4 W5 WEIGHT_b)

62 36 36 18.67 7.00 500

74 48 48 18.67 7.00 600

86 60 60 18.67 7.00 740

98 72 72 18.67 7.00 830

98 72 72 26.92 10.00 1020

APPROXIMATE

INSTALLED

WEIGHT (Ib)

485

58O

720

810

1 O00

NOTES:

I. All dimensions are ininches.

2. Dimension does not include end panels.

3. Two bottom panels provided for service

access.

4. Motor and electrical power input box on

right side of unit. Box includes fan speed

switch, On/Off switch and non-fused dis-

connect switch.

5. Connection hand is determined by facing

discharge of unit.

Fig. 4 -- 40UH Dimensions -- Front Discharge Units

1 °00---1

LEFT SIDE VIEW

(SIZES 075 TO 150)

1.00

(UNIT SHOWN

4.00 _ _ 7.50 WITH 1.00" --

END PANELS)

I __ L__ _PIPE

"1_TUNNEL W5 (OPENING

LEFT SIDE VIEW

(SIZE 200) CCN

CONTROLLER

(OPTIONAL)

BOTTOM SERVICE

PANELS

(SEE NOTE 3)

16.63

FRONT VIEW

-----7 :O

(SEE NOTE 2) !

(OPENING)

IilIiii J

f '

_-]IUlIIIIII IL-

RETURN AJR

LOUVERED PANEL

(OPTIONAL)

Bo'n'OM VIEW

-ELECTRICAL

BOX

DISCONNECT

SWITCH

8.00

NOTE 2)

REMOVABLE PANEL

(EACH END)

475_l--

(TYP)

OPENING (OPTIONAL

1.00 (TYp)

W4 17.50

LEGEND

CCN -- Carrier Comfort Network_

3,67

(TYP)

(_ .75

(MOUNTING HOLES---

TYP-4 PLACES)

1.25 4.50

TOP VIEW

2.27 _1 REAR OUTSI DWE2AIR /

5.00 _I OPENING(C)PTIONAL)7 l _ "

300

II 3_! o ,, ITII

575_ _,_G(%_,_N%)_

REAR VIEW

2.50

(TYP)

UNIT AIRFLOW DEPTH DIMENSIONS (In.) APPROXIMATE

SHIPPING

40UH (cfm) (in.) Wl W2 W3 W4 W5 WEIGHT (Ib)

075 750 40 62 36 36 18.67 7.00 530

100 1000 40 74 48 48 18.67 7.00 640

125 1250 40 86 60 60 18.67 7.00 790

150 1500 40 98 72 72 10.67 7.00 880

200 2000 44 98 72 72 26.92 10.00 1050

APPROXIMATE

INSTALLED

WEIGHT (Ib)

515

620

770

86O

1030

NOTES:

1. All dimensions are in inches.

2. Dimension does not include end panels.

3. Two bottom panels provided for service

access.

4. Motor and electricel power input box on

right side of unit. Box includes fan

speed switch, OnJOff switch and non-

fused disconnect switch.

5. Connection hand is determined by fac-

ing discharge of unit.

Fig, 5 -- 40UH Dimensions -- Down Discharge Plenum

Make Piping Connections -- Access to piping is

available through the access panels at the front, top, or end of

the vertical unit (horizontal access from bottom or side). Route

piping through the pipe tunnel or the unit's back panel or floor

panel. Metal blank-off panels must be trimmed to complete

piping installation. All piping connections must be performed

by qualified personnel in accordance with local and national

codes.

DRAIN CONNECTIONS -- Condensate drain connections

are located on each end of the drain pan near the bottom of the

unit. Condensate drain line must be 3/4 in. copper tubing,

.galvanized pipe, PVC or similar plastic pipe. Install drain line

m accordance with all applicable codes. Insulate the drain

line to prevent sweating. See Fig. 6 for typical drain trap

construction.

Units with cooling coils require traps to prevent air from

entering the condensate fitting and preventing proper drainage.

Drain must flow downhill from the unit a minimum of 1/_in.

per ft. Drain must be flee and clear at all times.

Insulate drain lines to prevent condensate. Care must be

taken to avoid interference with control panel on left side

drain.

WATER SUPPLY/RETURN CONNECTIONS -- Install pip-

mg in accordance with all apphcable codes. All piping must be

supported separately from coils.

Water supply must be connected so that entering water is on

leaving-air side of coil. See the connection labels on the unit to

locate the inlet. Coils must be adequately vented to prevent air

binding. Be sure valves are in proper operating position and are

easily accessible for adjustment.

If coil and valve package connections will be made with a

solder joint, care should be taken to ensure that components in

the valve package are not subjected to high temperatures which

may damage seals or other materials. Many 2-position electric

control valves are provided with a manual operating lever. This

lever should be in the OPEN position during all soldering

operations.

If coil connection is made with a union, the coil side of the

union must be prevented from turning (it must be backed up)

during tightening. Do not overdghten? Overtightening will dis-

tort (egg shape) the union seal surface and destroy the union

NOTE: A freezestat is factory-installed when a hot water/steam

coil is installed.

STEAM CONNECTIONS -- On units with steam heating

coils, the maximum steam pressure applied to the unit should

never exceed 10 psig (operating pressure 6 psig).

DIRECT EXPANSION REFRIGERANT PIPING -- Use the

condensing unit manufacturer's recommended line sizes and

requirements. Perform leak test using nitrogen. Evacuate and

charge per recommended heating, ventilation, and air condi-

tioning (HVAC) procedures and all applicable codes. Insulate

suction line after leak test up to the coil section end plate for

correct operation and to ehminate sweating. Use refrigerant-

grade copper lines only. The unit is NOT to be apphed as a

heat pump.

See Fig. 7 for refrigerant piping connections with recom-

mended locations for the thermostatic expansion valve (TXV)

and sensing bulb.

HYDRONIC COIL PIPING -- When all joints am complete,

perform hydrostatic test for leaks. Vent all coils at this time.

Cheek interior unit piping for signs of leakage from shipping

damage or mishandling. If leaks are found, notify a Carrier

representative before initiating any repairs. Release trapped air

from system (refer to Make Final Preparations section).

3/4"

PVC OR COPPER

3" MIN

2"MIN

3/4"

GALVANIZED PiPE

3" MIN

2" MIN

Fig. 6 -- Typical Condensate Drain Trap

Construction

EQUALIZER

_/ SENSING BULB (CLAMPED TO

ISUCTION LINE AND INSULATED)

__ SUCTION LINE

_LIQUID LINE

NOTE:FollowTXV manufacturer'sinstructions.

Fig. 7 -- Typical TXV (Thermostatic Expansion

Valve) Installation

All water coils must be protected from freezing after initial

filling with water. Even if system is drained, unit coils may

still have enough remaining water to cause damage when

exposed to temperatures below freezing.

Following the hydrostatic test, insulate all piping up to the

coil section end plate to prevent sweating.

To ensure compliance with building codes, restore the struc-

ttue's original fire resistance rating by sealing all holes with

material carrying the same fire rating as the structure.

Make Electrical Connections -- Refer to unit serial

plate for required supply voltage, fan and heater amperage, and

required circuit ampacities. Refer to unit wiring diagram for

unit and field wiring. See Tables 24 for electrical data.

All input power wiring connections are accessed through

the electrical panel on front right-hand side of the unit. Use the

openings that am for the piping connections. See the dimen-

sional drawings Fig. 1-5 for electrical box connections.

The fan motor should never be controlled by any wiring or

device other than the factory-supplied switch or thermostat/

switch combination unless prior factory authorization is ob-

tained. Fan motor may be temporarily wired for use during

construction only with prior factory approval and only in strict

accordance with the instructions issued at that time.

All electrical connections should be made by qualified per-

sonnel and be in accordance with governing codes and ordinanc-

es. Any modification of unit wiring without factory authorization

will invalidate all factory warranties and nullify any agency list-

ings. See Fig. 8A and 8B for typical wiring connections for basic

unit with CCN (Carrier Comfo_ Network®) controls.

Actuators (Field-Supplied) -- Field-supplied actuators

must be mounted on l/zin. diameter damper shafts.

Table 2 -- Electric Heater Data for Units with PSC Motor

UNIT FLA

40UV060

(at 500 Cfm)

HP NOMINAL NUMBER

V/PWHz ELEMENTS

208/1/60 5

240/1/60 5

277/1/50 5

1/s 3

208/3/60 5

240/3/60 5

460/3/60 5

LEGEND

OX -- Direct Expansion

FLA -- Full LoadAmps

I.AT -- Leaving-Air Temperature at 70 F Entering-Air

Temperature

MCA -- Unit Minimum Circuit Ampacity

MOCP -- Maximum Overcurrent Protection (Maximum Fuse S_ze

orCircuit Breaker Amps)

PSC -- Permanent Split Capacitor

17.2

22.2

27.3

32.3

19.5

25.3

31.2

37.0

16.8

21.8

26.9

31.9

10.8

15.8

19.5

12.1

17,9

22.2

6.0

8.9

11.0

11,0

LAT

(F)

104

119

106

115

124

106

115

124

104

110

106

116

124

106

115

124

NOTES:

TOTAL

MCA MocP CAPACITY

(kW)

21.5 25 3.2

27,8 30 4,2

34.1 35 5.3

40.4 45 6.3

24.4 25 4.2

31,7 35 5.6

39.0 40 7.0

46.3 50 8,4

21 ,O 25 4.2

27.3 30 5,6

33.6 35 7,0

39.9 40 8.4

13.5 15 3.2

19.6 20 4.2

24.4 25 5.3

24.4 25 6.3

15.1 20 4.2

22.4 25 5.6

27.8 30 7.0

27.8 30 8.4

7.5 15 4.2

11.1 15 5.6

13.8 15 7.0

13.8 15 8.4

1. LAT (Leaving Air Temperature) (F) is measured at nominal cfm.

2. Water and DX coil used on electric heat units have left-hand

coilconnections.

3. Electric heat is available in the reheat posiiton only and connec-

tions are on the right side.

4. Face and bypass units are available with 3 heating elements

only.

Table 2 -- Electric Heater Data for Units with PSC Motor (cont)

UNIT HP NOMINAL

V/Ph/Hz FLA MCA MOCP

40UV, UH075

(at 750 Cfm) 1/5

DX -- Direct Expansion

FLA

I-AT

208/1/60

240/1/60

27711/60

208/3/60

240/_60

460/3/60

NUMBER

ELEMENTS

LEGEND

-- Full Load Amps

Leaving-Air Temperature at 70 F Entering-Air

Temperature

-- Unit Minimum Circuit Ampacity

23.7

30.9

38.1

45.3

27.0

35.3

43.7

52.0

23.3

30.5

37.7

44,9

14.5

21.7

27.0

16.5

24.8

30.9

8.2

12.3

15.4

LAT

(F)

102

108

104

113

121

104

113

121

102

103

104

113

121

104

113

121

29.6

38.6

47.6

56.7

33.8

44.2

54.6

65,0

29.1

38.1

47.1

56.2

18.2

27,2

33.8

20.6

31.0

38.6

10.2

15,4

19.2

19,2

TOTAL

CAPACITY

(kW)

4.5

6.0

7.5

9.0

6.0

8.0

10.0

12.0

6.0

8.0

10.0

12.0

4.5

6.0

7.5

9.0

6.0

8.0

10.0

12.0

6.0

8.0

10.0

12.0

MCA

MOCP -- Maximum Overcurrent Protection (Maximum Fuse Size

or Circuit Breaker Amps)

PSC -- Permanent Split Capacitor

NOTES:

1. LAT (Leaving Air Temperature) (F) is measured at nominal cfm.

2. Water and DX coil used on electric heat units have left-hand

coilconnections.

3. Electric heat is available inthe reheat position onlyand connec-

tions are on the rightside.

4. Face and bypass units are available with 3 heating elements

only,

Table 2 -- Electric Heater Data for Units with PSC Motor (cont)

uNrr HP NOMINAL

v/Ph/Hz FLA MCA

40UV, UH1OO

(at 1000 Cfm)

208/1/60

240/1/60

277/1_0

208/3/60

240/3/60

460/3/60

NUMBER

ELEMENTS

LEGEND

DX -- Direct Expansion

FLA -- Full LoadAmps

LAT -- Leaving-Air Temperature at 70 F Entering-Air

Temperature

MCA -- Unit Minimum Circuit Ampacity

30.9

40.5

50.2

59.8

35.3

46.5

57.6

68.7

30.5

40.1

49.7

59,4

18,7

28.3

35.4

21.3

32.4

40.5

10.6

16.1

20.2

LAT

(F)

102

IO8

104

112

121

I04

112

121

102

108

104

112

121

104

112

121

38.6

50.7

62.7

74.7

44,2

58.1

72,0

85.8

38.1

50.1

62.2

74.2

23.4

35.4

44.3

26.6

40.5

50.7

13.2

20.1

25.2

TOTAL

MOCP CAPACITY

(kW)

40 6.0

60 8.0

70 10.0

80 11,9

45 8.0

60 10,7

80 13.3

90 16.0

40 8.0

60 10.7

70 13.3

80 16.0

25 6.0

40 8.0

45 10.0

45 11,9

30 8.0

45 10.7

60 13.3

60 16.0

15 8.0

25 10.7

30 13.3

30 16.0

MOCP -- Maximum Ovemurrent Protection (Maximum Fuse Size

or Circuit Breaker Amps)

PSC -- Permanent Split Capacitor

NOTES:

t. LAT (Leaving Air Temperature) (F) is measured at nominal cfm.

2. Water and DX coil used on electric heat units have left-hand

coil connections.

3. Electric heat is available in the reheat positiononly and connec-

tions are on the rightside.

4. Face and bypass units are available with 3 heating elements

only.

Table 2 -- Electric Heater Data for Units with PSC Motor (cont)

UNIT HP NOMINAL

V/Ph/Hz FLA MCA

40UV, UH125

(at 1250 Cfm) 1/s

208/1/60

240/1/60

277/1/60

208/3/60

240/3/60

460/3/60

NUMBER

ELEMENTS

LEGEND

DX -- Direct Expansion

FLA -- Full LoadAmps

I.AT -- Leaving-Air Temperature at 70 F Entering-Air

Temperature

38.1

50.1

62.2

74.2

43.7

57.6

71.4

85.3

37.7

49.7

61.8

73.8

22.9

34.9

43.7

26.1

40.0

50.2

13.0

19.9

25.0

LAT

(F)

102

108

104

113

121

104

113

121

102

108

104

113

121

104

113

121

47.6

62.7

77.7

92.8

54.6

71.9

89.3

106.7

47.1

62.2

77.2

92.2

28.6

43.6

54.7

32.6

50.0

62.7

16.2

24.9

31.3

TOTAL

MOCP CAPACITY

(kW)

50 7.5

70 10.0

80 12.5

100 15.0

60 10.0

80 13.3

90 16,7

110 20.0

50 10,0

70 13.3

80 16,7

100 2O,O

30 7.5

45 10.0

60 12.5

60 15.0

35 10.0

50 13.3

70 16.7

70 20.0

20 10,0

25 13.3

35 16,7

35 20.0

MCA -- Unit Minimum Circuit Ampacity

MOCP -- Maximum Ovemurrent Protection (Maximum Fuse Size

or Circuit Breaker Amps)

PSC -- Permanent Split Capacitor

NOTES:

1. LAT (Leaving Air Temperature) (F) is measured at nominal cfm,

2. Water and DX coil used on electric heat units have left-hand

coil connections.

3, Electricheatisavailableinthereheatpositiononlyandconnec-

tions are on the right side.

4. Face and bypass units are available with 3 heating elements

only,

*Left hand coil connections only.

Table 2 -- Electric Heater Data for Units with PSC Motor (cont)

UNIT HP NOMINAL

V/Ph/Hz FLA MCA MOCP

40UV,UH150

(at 1500 Cfm)

DX -- Direct Expansion

FLA

LAT

208/1/60

240/1/60

277/1/60

208/3/60

240/3/60

460/3/60

NUMBER

ELEMENTS

LEGEND

-- Full Load Amps

Leaving-Air Temperature at 70 F Entering-Air

Temperature

45.3

59,8

74.2

88.7

52.0

68.7

85.3

44.9

59,4

73.8

27.0

41.5

52.1

30.9

47,5

59,8

15.4

23.7

29.8

29,8

LAT

(F)

102

109

104

113

104

113

102

108

104

113

121

104

113

121

56.7

74.7

92.8

110.8

65.0

85.8

106.7

56.2

74.2

92.3

33.8

61.9

65.1

65,1

38.6

59.5

74.8

19,2

29.6

37.3

100

125

110

100

TOTAL

CAPACITY

(kW)

9.0

12.0

15.0

18.0

12.0

16,0

20.0

12.0

16.0

20.0

9,0

12.0

15.0

18.0

12.0

16.0

20.0

24.0

12.0

16.0

20.0

24.0

MCA -- Unit Minimum Circuit Ampacity

MOCP -- Maximum Ovemurrent Protection (Maximum Fuse SLze

or Circuit Breaker Amps)

PSC -- Permanent Split Capacitor

NOTES:

1. LAT (Leaving Air Temperature) (F) is measured at nominal cfm.

2. Water and DX coil used on electric heat units have left-hand

coilconnections.

3. Electric heat le available in the reheat positiononly and connec-

tions are on the right side.

4. Face and bypass units are available with 3 heating elements

only.

*Left hand coil connectionsonly.

Table 3 -- Electric Heater Data for Units with ECM

UNIT

40UV05O

(at 500 Cfm)

HP NOMINAL

V/Ph/Hz

208/1/66

240/1/60

277/1/60

1/3

208/3/60

240/3/60

460/3/60

LEGEND

-- Direct Expansion

NUMBER

ELEMENTS

FLA

LAT

Temperature

MCA -- Unit Minimum Circuit Ampacity

MOCP -- Maximum Overcurrent Protection (Maximum Fuse Size

orCircuit Breaker Amps)

PSC -- Permanent Split Capacitor

-- Full Load Amps

Leaving-Air Temperature at 70 F Entering-Air

FLA

16.5

21.5

26,6

31,6

18,8

24,6

30,5

36.3

16,3

21,3

26,4

31,4

10,1

15.1

18.8

11.4

17.2

21.5

5.4

8.3

10.5

LAT

(F)

104

110

106

115

t 24

166

115

124

104

110

106

115

124

106

115

124

NOTES:

TOTAL

MCA MOCP CAPACITY

(kW)

20.6 25 3,2

26.9 30 4,2

33.2 35 5,3

39.5 40 6,3

23.5 25 4,2

30.8 35 5.6

38.1 40 7.0

45.4 50 8.4

20.3 25 4.2

26.6 30 5.6

33.0 35 7.0

39.3 40 8,4

12.6 15 3.2

18.9 20 4.2

23.5 25 5.3

23.5 25 6.3

14.3 15 4.2

21,6 25 5.6

26.9 30 7.6

26.9 30 8.4

6.8 15 4.2

16.4 15 5.8

13.1 15 7.0

13.1 15 8.4

1. LAT (Leaving Air Temperature) (F) is measured at nominal cfm.

2. Water and DX coil used on electric heat units have left-hand

coilconnections.

3. Electric heat is available inthe reheat position only and connec-

tions are on the rigl_ side.

4. Face and bypass units are available with 3 heating elements

only.

Table3-- Electric Heater Data for Units with ECM (cont)

UNIT HP NOM[NAL NUMBER

OF FLA LAT

V/Ph/Hz ELEMENTS (F) MCA

40UV, UH075

(at 750 Cfm) 1/z

DX -- Direct Expansion

208/1/60

240/1/50

277/1/60

208/3/60

240/0/60

460/0/60

LEGEND

-- Full Load Amps

Leaving-Air Temperature at 70 F Entering-Air

FLA

LAT

Temperature

MCA -- Unit Minimum CircuitAmpacity

24.0

31.2

38.4

45.6

27.3

35.6

44.0

52.3

23.7

30.9

38.1

45.3

14.8

22.0

27.3

16.8

25.1

31.2

8.2

12.3

15.4

102

108

104

113

121

104

113

121

102

108

104

113

121

104

113

121

30.0

39.0

48.0

57.0

34.1

44.5

55.0

65.4

29.6

38.6

47.6

56.7

18.5

27.6

34.2

20.9

31.4

39.0

10.2

15.4

19.2

TOTAL

MOCP CAPACITY

(kW)

30 4.5

40 6.0

50 7.5

60 9.0

35 6.0

45 8.0

60 10.0

70 12.0

30 6.0

40 8.0

50 10.0

60 12.0

20 4.5

30 6,0

35 7,5

35 9.0

25 6.0

35 8,0

40 10.0

40 12,0

15 6.0

20 8.0

20 10,0

20 12,0

MOCP -- Maximum Overcurrent Protection (Maximum Fuse S_e

or Circuit Breaker Amps)

PSC -- Permanent Split Capacitor

NOTES:

1. LAT (Leaving Air Temperature) (F) is measured at nominal cfm.

2, Water and DX coil used on electric heat units have left-hand

coil connections.

3. Electric heat is available in the reheat positiononly and connec-

tions are on the right side.

4, Face and bypass units are available with 3 heating elements

only,

Table 3 -- Electric Heater Data for Units with ECM (cont)

UNIT HP NOMINAL

V/Ph/Hz FLA MCA

40UV,UH100

(at 1000 Cfm)

208/1/60

240/1/60

277/1/60

208/3/60

240/3/60

460/3/60

NUMBER

ELEMENTS

LEGEND

31.5

41.1

50.8

60.4

35.9

47.1

58.2

69.3

31.2

40.8

50.4

60.1

19.3

28.9

36.0

21.9

33.0

41.1

10.6

16.2

20.3

LAT

(F)

102

108

104

112

121

104

112

121

102

108

104

112

121

104

112

121

39.4

51.4

63.4

75.5

44.9

58.8

72.7

88.6

39.0

51.0

63.1

75.1

24.1

36.2

45.0

27.3

41.2

51.4

13.3

20.2

25.3

TOTAL

MOCP CAPACITY

(kW)

40 6.0

60 8.0

70 10.0

80 11.9

45 8.0

60 10.7

80 13,3

90 16,0

40 8.0

60 10.7

70 13.3

80 16.0

25 6.0

40 8.0

50 10.0

50 11,9

30 8.0

45 10.7

60 13.3

60 16.0

15 8.0

25 10.7

30 13.3

30 16.0

DX -- Direct Expansion

FLA -- Full Load Amps

I.AT Leaving-Air Temperature at 70 F Entering-Air

Temperature

MCA -- Unit Minimum Circuit Ampacity

MOCP -- Maximum Overcurrent Protection (Maximum Fuse Size

orCircuit Breaker Amps)

PSC -- Permanent Split Capacitor

NOTES:

1. LAT (Leaving Air Temperature) (F) is measured at nominal ctm.

2. Water and DX coil used on electric heat units have left-hand

coilconnections.

3. Electric heat is available in the reheat position only and connec-

tions are on the right side.

4. Face and bypass units are available with 3heating elements

onty.

Table 3 -- Electric Heater Data for Units with ECM (cont)

UNIT HP NOMINAL

V/Ph/Hz FLA MCA

40UV, UH125

(at 1250 Cfm) 1/2

208/1/60

240/1/60

277/1/60

208/3/60

240/3/60

460/3/60

NUMBER

ELEMENTS

LEGEND

DX -- Direct Expansion

FLA -- Full LoadAmps

LAT -- Leaving-Air Temperature at 70 F Entering-Air

Temperature

MCA -- Unit Minimum Circuit Ampacity

39.4

51.5

63.5

75.5

45.0

58.9

72.7

86.6

39.0

51.0

63,1

75.1

24.2

36,2

45,0

45.0

27.4

41.3

51.5

13.2

20.2

25.3

LAT

(F)

102

108

1O4

113

121

104

113

121

102

108

104

113

121

104

113

121

49.3

64.3

79.4

94.4

56.2

73.6

90.9

108.3

48.7

63.8

78.8

93.9

30.2

45.3

56.3

34.2

51.6

64.3

16.5

25.2

31.6

TOTAL

MOCP CAPACITY

(kW)

50 7,5

7O 10.0

80 12,5

100 15.0

60 10.0

80 13.3

100 16.7

110 20.0

50 10.0

70 13.3

80 16.7

100 20.0

35 7.5

50 10.0

60 12.5

60 15.0

35 10.0

60 13.3

70 16.7

70 20.0

20 10,0

30 13.3

35 16,7

35 20.0

MOCP -- Maximum Ovemurrent Protection (Maximum Fuse Size

or Circuit Breaker Amps)

PSC -- Permanent Split Capacitor

NOTES:

1. LAT (Leaving Air Temperature) (F) is measured at nominal cfm.

2. Water and DX coil used on electric heat units have left-hand

coilconnections.

3. Electric heat is available in the reheat position only and connec-

tions are on the right side.

4. Face and bypass units are available with 3 heating elements

only

*Left hand coilconnections only.

Table3-- Electric Heater Data for Units with ECM (cont)

UNIT HP NOMINAL

VfPh/Hz FLA MCA MOCP

40UV,UH150

(at 1500 Cfm) 1/2

208/1/60

240/1/60

277/1/60

208/3/60

240/3/60

460/3/60

NUMBER

ELEMENTS

LEGEND

DX -- Direct Expansion

FLA -- Full Load Amps

LAT -- Leaving-Air Temperature at 70 F Entering-Air

Temperature

46.7

61.1

75.6

90.0

53.3

70.0

66.6

46.2

60.7

75.1

28.3

42.8

53.4

32.2

48.9

61.1

15.6

24.0

30.1

LAT

(F)

102

108

104

113

104

113

102

108

104

113

121

104

113

121

58.3

76.4

94.4

112.5

66.6

87.5

108.3

57.8

75.8

93.9

35.4

53.5

66.7

40.9

61.1

76.4

19.5

30.0

37.6

100

125

110

100

TOTAL

CAPACITY

(kW)

9.0

12.0

15.0

18.0

12.0

16.0

20.0

12.0

16,0

20.0

9.0

12.0

15.0

18.0

12.0

16.0

20.0

24.0

12.0

16.0

20.0

24.0

MCA -- Unit Minimum Circuit Ampacity

MOCP -- Maximum Overcurrent Protection (Maximum Fuse Size

or Circuit Breaker Amps)

PSC -- Permanent Split Capacitor

NOTES:

1. LAT (Leaving Air Temperature) (F) is measured at nominal cfm.

2. Water and DX coil used on electric heat units have left-hand

coil connections.

3. Electric heat is available inthe reheat positiononly and connec-

tions are on the right side.

4. Face and bypass units are available with 3 heating elements

only.

*Left hand coil connections only.

Table3-- Electric Heater Data for Units with ECM (cont)

UNIT HP NOMINAL

V/PWHz FLA MCA

40UH200

(at 2000 Cfm)

208/1/60

240/1/60

27_1_0

208/3/60

240/3/60

460/3/60

NUMBER

ELEMENTS

LEGEND

DX -- Direct Expansion

FLA -- Full Load Amps

I.AT -- Leaving-Air Temperature at 70 F Entedng-Air

50.1

64.6

79.0

93.5

56.8

73.5

90.1

48.8

63.3

77.7

31.8

46.3

56.9

35.7

52.4

64.6

16,9

25.2

31,3

31.3

LAT

(F)

102

I08

102

I08

62.7

80.7

98.8

116.8

71.0

91.8

112.7

61.0

79.1

97,1

39.8

57.9

71.1

44.6

65.5

80.8

21.1

31.5

39.1

TOTAL

MOCP CAPACITY

(kW)

70 9.0

90 12,0

100 15.0

125 18.0

80 12.0

100 16.0

125 20.0

70 12.0

80 16.0

100 20.0

40 9.0

69 12.0

80 15.0

80 18.0

45 12.0

70 16.0

90 20.0

90 24,0

25 12.0

35 16,0

40 20,0

40 24.0

Temperature

MCA -- Unit Minimum CircuitAmpacity

MOCP -- Maximum Overcurrent Protection (Maximum Fuse S_-e

or Circuit Breaker Amps)

PSC -- Permanent Split Capacitor

NOTES:

1. LAT (Leaving Air Temperature) (F) is measured at nominal cfm.

2. Water and DX coil used on electric heat units have left-hand

coilconnections.

3. Electric heat is available inthe reheat position onlyand connec-

tions are on the right side.

4. Face and bypass units are available with 3 heating elements

only.

*Left hand coil connections only

UNIT 40UV,UH SIZE

050*

O75

100

125

150

MOTORHp

I/s

'/s

I/s

Table 4 -- Motor Data

PSC MOTORS

VOLTAGE FLA MCA MOP (Amps)

115 3.7 4.6 8,3

208/230 2.0 2.5 4,5

266 1.6 2,0 3,6

115 3,7 4.6 8.3

208/230 2.0 2.5 4.5

265 1.6 2.0 3.6

115 3.7 4.6 8.3

208/230 2,0 2.5 4.5

265 1,6 2,0 3,6

115 3,7 4.6 8.3

208/230 2,0 2,5 4,5

265 t .6 2,0 3,6

t 15 3.7 4,6 8,3

208/230 2.0 2.5 4.5

265 1.6 2,0 3,6

MAX FUSE SIZE

(Amps)

UNIT 40UV, UH SIZE

05O*

075

100

125

150

200t"

MOTOR Hp

1/3

1/2

LEGEND

ECM -- Electronically Commutated Motor

FLA -- Full Load Amps

MCA -- Minimum Circuit Amps

MOP -- Maximum Overload Protection

PSC -- Permanent Split Capacitor

*Available in vertical configuration only,

"j-Available in horizontal configuration only,

ECM

VOLTAGE

115

208/230

265

115

208/230

265

115

208/230

265

115

208/230

265

115

208/230

265

115

208/236

265

FLA MCA MOP(Am_)

1.4 1.8 3.1

1.3 1.6 2.9

1,1 1.4 2.6

3,7 4.6 8.3

2,3 2.9 5.1

2.0 2.5 4.5

4,0 5,0 9.1

2,6 3,2 5.8

2.3 2,9 5.1

4.7 5.9 10.6

3.3 4.1 7.4

2.9 3.6 6.6

4.7 5.9 10.6

3.3 4.1 7.4

2.9 3.6 6.6

9,6 12.0 21.6

6.8 8.5 15.3

5.5 6.9 12.4

MAX FUSE SIZE

{Amps)

BLK/100 DISC1 • BLK/101 BLK/I_ SWl BLK/10g

Lt --- __.,,_

115v USE COPPER SUPPLY WIRES

WHT/110 WHT/110 WHT/I_

N .... I

GND .... %

LEGEND

DISC -- Disconnect Switch

ECM -- Electronically Comrnutated Motor

ESP -- External Static Pressure

FU -- Fuse

GND -- Ground

LLT -- Water Coil Low LimitThermostat

SW -- Switch

TRAN -- Transformer

--_ _--- Harness Conn•ction

• Connection Point Splice

•Splice Terminal Connection

O Component Tie Point

.... Optional Wiring

-- Factory Wiring

Chassis Ground

Earth Ground

,.0v.c il ,.vAc

WHT/111 •_II_RN_504

NOTES:

1. Make electrical installation in accordance with job diagram, and in com-

pliance with naUon•l and local electrical codes,

2. Low limit thermostat (LLT) is installed on all units with water ceils.

3. Wire YEL/EC5 factory connected to LOW. Positions MED, HIGH, MAX

• re for field use with increased ESR

ISW2 C) AUTO WHT/515

OF F

(_ CONT V!O/516

CBC1

RED/511 _ !_

BRN/51 7m

_ YEU51

WHT/51 Ii I

VIO/51'

BLU/51

ORN/51;

BLU/EC9

ORN/EC2•

SEE NOTE 3

SPEEDBOARD

LOW YEUE05 _ 5

HIGH

= RED,EO<.

i,W,RE\J ,P,.

POWER _ RECEPTACLE

CABLE _ _ ON MOTOR

Fig. 8A -- Unit Ventilator Wiring with CCN Controls -- Control Box (115 vac)

t-J

RESISTOR HARNESS

1000 ohm I V1C

NOTE 3 _-- _I000 ohm_ --I

Detail A - STEAM VALVE WIRING

LL OR

VlO/2 Ni3

See Detail A for

Slum Vah_ Wiring, VIC

LEGEND RED RED

AQ -- Air Quality BLU

CCN Carder Comfort Network® rio

CGO_ Changeover

COM -- Common

CW Chilled Water

ECM E_ectronically

Commu

GND Ground v2c

CGOVR -- Changeover

-- Chilled Water NOTE3

Commutatad Motor

-- Hot Water

LL -- Low Limit Device

MAT -- Mixed Air Temperature

OAT

OCC/

UNOCC

RAT

SAT

EPT

SPT ADJ

-- Normally Closed

Normally Open

Outdcor Ad

-- Outdoor Air Temperature

-- Occupied/Unoccupied

Return Air Temperature

Relative Humdity

Supply Air Temperature

Space Temperature

Adjustment

Harness Connection

Connection Point Splice

•SpikesTerminal Connection

RED F_ED

ORN

YEL

GRa

OA damper no_tnRtniledon

ReclrculationOniy Uni_ OAC

Component Tie Point

Opgonal Wiring

Factory Wiring

TL/ Chassis Ground

Earth Ground

BLUII

-_,T6_

BLU

RED

ORN

YEL

BLK

GRA

RED W_BLKRED

CB,m.CI

.RED==

24vt_t)-- '2<;eLK"

24 V (gnd} -- _. BRN

_D SW2_;OM I_- YEL

SW2-AUTO 5_ WHT

SW2-CONT -- i _ VIO

:_ ECM r_BLU

ECM I") ORN

NOTE 4

NOTES:

CBC3

BRN

RED

csc2

<-3

CBC2

'2 4-8

'4 (-4

_8 _- 5

YEI

GRI

RED

T1 i

Jl SPT

Power 1"2

T3 i

SAT

J4 T4 i

Sewice MAT T5 i

Te =

_J3 TTi_.

CCN OAT TE

SPT ADJ T10 i

aT26 24Vdc Tl1 mm

iRED ........... Spare AI TI 2 J

OR ORb

REE

YEL I YEL

BLU l BLU

BLU RAT NOTE 1

_CX SAT

RED OAT

(Field In_toiled}

NOTE i

BLK

WHT

NOTE 2 w/Setp°lnt Adjust

VIO _V_ _T33

WHT I WHT _T34

eLK BLK _T36

Heetlng

=_ T37 Enable

=_,mT38

1"2 Ccollng iT15_ WHT (Optional)

RH/Spam

_. T31 I___j _FieldSupped/

L_-.J

Heating

._T32 Outpat ENTHALPY

SWtTCH

CBC3

cBC,,_._3 ORN

aE°i!

BRN

4VO

t_?_T 5BLU

VIO WriT

BLU

ORN (8 CBC2

SFS T17 m

unused T18 m

OA Enth T19

R SIS 3"20m

FED 3"21m

L'-r T22 _

CH_VR T23 m

Sp_r_ DI _4m

Comm<ln T25 _

/IO

TB2

ORN/38

K3 K2 K1

)RN ORN

_LK/21

IRN

OCC_UNOCC f

FIRFJSMOKE

DETECTOR

RED/FSD

NOTE 5

1. When factory installed, options/wall-mount space sensor is wired to provide set point adjustment only, When remote sensor installation Is field required, disconnect

the factory-supplied return air sensor and wire as shown.

2. Use shielded wire when field installing these parts. Connect the drain wire to the unitchassis and insulate the sensor end, Factory wiring consists of unshlelded wire.

3. Hot water (HW) valve opens on loss of power. Chilled Water (CW) valve oloses on loss of power.

4. See power diagram for CBC1 wiring,

5. Wire RED/FSD factory wired to TB2. When field installing a fire/smoke detector, remove RED/FSD from TB2 and wire as shown.

Fig. 8B -- Unit Ventilator Wiring with CCN Controls -- Control Diagram (115 vac)

Make Duct Connections -- If applicable, install all

ductwolk to and from unit in accordance with all applicable

codes. Duct construction must allow unit to operate within duct

external static pressure limits as shown on job submittals and in

Tables 5 and 6. Duct opening should be the same size as the

unit. For units ducted to multiple openings, make sure there is

adequate straight duct, as shown below, immediately after the

traiL

40UH _ 200

Minimum Straight

Duct Required 75

(Length in ft)

Units designed to operate with ductwork may be damaged

if operated without intended ductwork attached.

Ensure that units ducted to multiple openings have sufficient

straight duct immediately after the uniL

Units provided with outside air must utilize the low-

temperature safety switch to prevent coil freeze-up.

Insulate all ductwork as required. Use flexible connections

to minimize duct-to-unit alignment problems and noise trans-

mission where specified.

Install ductwork, grilles, and plenums so that they do not

restrict access to filter.

Cut openings for supply and return air grilles, thermostats,

and switch plates where specified on job drawings. Be careful

not to cut wires, piping, or structural supports. Use a steel ther-

mostat shield ring to protect drywall from thermostat wiring

where applicable.

Prevent dust and debris from settling in unit. If wall finish or

color is to be applied by spraying, cover all openings to

prevent spray from entering unit_

Table 5 -- Unit Ventilator Airflow -- PSC Motor*

FACTORY SETTINGS -- CHILLED WATER COIL APPLICATIONS

Unit

40UV060

40UV,UH075

40UV,UH100

40UV,UH125

40UV,UH150

Speed 1-Row 2-Row

Max 522 510

High 503 490

Low 458 449

Max 806 778

High 682 664

Low 569 554

Max 1064 1033

High 662 659

Low 530 519

Max 1295 1285

High 899 930

Low 568 616

Max 1542 1480

High 1071 1068

Low 812 801

ApproxlmateAIrDellvery(Cfm)

3-Row 4-Row 5-Row

497 485 490

476 464 473

440 425 452

750 747 766

645 629 621

539 527 533

1001 1013 973

655 642 763

507 503 498

1215 1218 1239

876 865 852

597 570 563

1500 1484 1468

1065 1034 1033

790 881 848

6-Row

489

476

455

732

596

514

980

740

501

1250

846

558

1482

1031

842

7-Row

457

444

430

697

570

495

967

717

584

1175

846

573

1374

1013

799

FACTORY SETrlNGS -- ELECTRIC HEAT/DX COIL APPLICATIONS

Unit

40UVO60

40UV, UH075

40UV, UH100

40UV, UH126

40UV, UH150

Speed 1-Row 2-Row

Max 522 510

High 503 490

Low 458 449

Max 806 778

High 682 664

Low 5fi9 554

Max 1064 1033

High 794 788

Low 662 659

Max 1295 1285

High 1055 1040

Low 738 767

Max 1542 1480

High 1285 1257

Low 934 928

ApproxlmateAIrDellvery(Chn)

3-Row 4-Row 5-Row

497 485 490

476 464 452

440 425 410

750 747 766

645 629 621

539 527 533

1001 1013 973

782 773 857

655 642 628

1215 1218 1239

1024 995 1099

732 719 987

1500 1484 1468

1229 1248 1246

922 901 1033

6-Row

489

455

414

732

596

514

980

834

620

1250

1091

986

1482

1239

1031

7-Row

457

430

406

697

570

495

967

fil0

611

1175

1052

964

1374

1199

1013

LEGEND

CX -- Chilled Water Applications

DX -- Direct Expansion

HW -- Hot Water

*Standard on sizes 050-150.

NOTE: Use the table below to determine the heating and cooting coil

combinations available with PSC Motor operation.

HEATING COIL

COOLING COIL HW Steam Electric

5 Rows Clht 1 or 2 rows 1oN/Asr2ow 3 elements

4 Rows CW 3 rows 1 or 2 rows 4elements

3 Rows CW or nxt 4 rows 5 or 6 elements

tDX cooling applications are only available in 3-row cooling

configurations.

Table6-- Unit Ventilator Airflow -- ECM Airflow

UN_ S#E

4OUV050

40UV, UHO75

_U_UHI_

40UV, UH125

40U_UH150

4OUH200

MOTOR

HP COIL TYPE

1/3 3-4EH/DX

5-6EH

l/a 3_EH/DX

5-6EH

1/3 3_.EH/DX

5-6EH 1016

CW 1266

1/z 3*4EH/DX 1266

5-6EH 1259

CW 1503

1/2 3-4EH/DX 150_

5-6EH 1517

s/4 ALL 2014

LEGEND

3-4EH/DX -- Direct Expansion Coil Applications with 3 to

4ELements of Electric Heat

5-6EH m5 to 6 Elements of Electdc Heat

CW -- Chilled Water lica5ons

ESP External Static_rel._u re

APPROXIMATE AIR DELIVERY (C/m)

ESP Speed Board Position

Low Position Med Position High Position Max Position

(0.0 In, wg) (0.10 in. wg) (0.25 in. wg) 10.45 in. wg)

Max Hi_lh Low Max High Low Max High Low Max Hi_lh Low

499 336 248 ............

499 419 336 --

491 380 324 --

747 484 346 753 548 432 752 530 437 751 541 386

747 644 498 753 609 472 752 612 470 751 618 498

755 645 583 746 598 539 755 585 554 765 610 542

997 703 505 987 693 543 1012 663 483 994 692 480

997 853 615 987 850 639 1012 823 526 994 819 618

819 71g 1002 851 709 1024 798 787 1024 820 734

880 657 1239 905 609 1235 898 676 1231 898 627

1023 769 1239 1055 758 1235 1037 765 1231 1010 778

1049 897 1239 995 888 1226 995 888 1253 994 919

1033 775 1479 1046 712 1494 1020 770 1485 1075 737

1246 956 1479 1216 965 1494 1269 927 1486 1222 917

1222 1068 1490 1206 1087 1498 1159 1120 1503 1188 1074

1384 1023 1981 1386 971 1965 1385 997 1814 1354 993

NOTES:

1. Factory default is Low Position.

2. Med, High, and Max positions are field settings.

Make Final Preparations

!. Turn power off (lock out and tag electrical disconnect).

2. Install thermostats and perform any other final wiring as

applicable.

3. Clean dirt, dust, and other construction debris from unit

interior. Be sure to check fan wheel and housing.

4. Rotate fan wheel by hand to be sure it is free and does not

rob on housing.

5. Be sum drain line is clear and is properly and securely

positioned. Pour water into drain to check operation.

6. Vent all air from unit coil and related piping. If air vent is

manual, release air from system by turning air vent screw

1V2 turns counterclockwise with screwdriver. When

steady stream of water begins to escape, close valve. If air

vent is automatic, trapped air will be vented automatical-

ly. Vent releases air slowly, usually dripping water into

drain pan in the process.

Make sure all service valves am open and that motorized

control valves, if supplied, are set for automatic operation.

7. Check all control valves in the system for proper opera-

tion in accordance with valve manufacturer's instructions.

8. For units with factory-installed balancing valves, adjust

as follows:

a. Butterfly valves -- Turn valve gate by inserting

screwdriver into slot in valve top and rotating up to

90 degrees. Valve is fully open when slot is parallel

with valve body. When slot is perpendicular to

body, flow through valve is at minimum. Valve

does not seal against flow.

b. Ball valves with lever handles -- Valve gate action

is similar to butterfly valves above except that

when handle is perpendicular to valve body, there

is no flow through valve. Ball valves may be used

as shutoff valves.

9. Install filter in frame at front of coil. If field-supplied

filters are used, be sure size is correct. See Table 1 for

filter data.

10. Ensure all panels and filters are installed before checking

fan operation. Turn on unit power. Check fan and motor

operation.

IMPORTANT: Do not start up or operate unit without

filter and panels installed. Be sure filter and unit interior

are clean.

PRODUCT INTEGRATED CONTROL

Physical Characteristics -- Figure 9 showsthe loca-

don of factory-supplied and factory-installed sensors, switches,

and devices (standard and optional). Tables 7-11 summarize

the Unit Ventilator Comfort Control module offerings and

accessory packages.

The control includes the electronic control board assembly,

fuses, relay, transformer, rermmal block, low-limit air tempera-

ture protection (water coil units only), and other devices. A

disconnect switch, located below the control box, is provided

to shut off the power to the control box (see Fig. 10). See

Tables 8 and 9 for factory-installed options and accessory

packages.

Control environmental limitations am as follows:

Shipping Temperature -40 to 185 F

Shipping Humidity 10 to 95%

Operating Temperature 32 to 140 F

Operating Humidity 10 to 90%

The Unit Ventilmor Comfort Control module is pewered from

the same source as the unit's single source power connection.

Field wiring fur accessories terminates in the control enclo-

sure. Control accessory wiring requirements am 18 or 20 gage,

2 or 3 conductor twisted as specified. Refer to wiring details for

more information. See Table 10 for control board terminal

designations.

Carder's 40UV, UH unit ventilators with factory-installed

controls are ETL listed and listed to UL standard 1995 for heat-

ing and cooling equipment. All listings are for the complete

unit and all factory-supplied accessories. Use of other accesso-

ry components am not covered under these listings.

Table 7 -- Standard Control Offerings

All control offerings provide the following features:

1. A 3-speed automatic fan control that minimizes fan noise by

matching the fan speed to the load. This process provides

better dehumidification during cooling and reduces energy

consumption.

2. American Society of Heating, Refrigeration and Air Conditioning

Engineers (ASHRAE) Cycle I, Cycle II, or Cycle I11damper con-

trol options (Cycle II default).

3. Conflgurable minimum ventilation set point (cfm) for ASHRAE

Cycle II or Cycle Ill damper control.

4. Demand controlled ventilation with optional sensor to meet ven-

tilationrequirements with improved efficiency.

5. Coil freeze protection on all units except non-water units.

6. Proportional Integrated Derivative (PID) logic heating, cooling

and damper controls to maintain temperature.

7. Adjustable filter maintenance timer on all units.

8. Direct shaft coupled, electric actuators on all dampers. Spring

returnon outdoor-air (OA) damper.

9. Spring return medulatingwater valves.

10. Optional relative humidity sensor for high humidity control or

dehumidification.

11. Optional remote-mounted space sensor with set point adjust-

ment, tenant override, and service port jack.

12. Optional linkage thermostat with time clock, set point adjust-

ment, .schedu e and. ho iday programming digital temperature

set pointand equlement status dzspley.

CONTROL SEQUENCE

2AJ3A

2Bi3B

2D/3D

2F/3F

2G/3G

2J/3J

20/30

21/31

22/32

23/33

24/34

25/35

2M/3M

2G/3G

2B/3B

2K/3K

LEGEND

DX -- Direct Expansion

F&B -- Face and Bypass

APPLICATION

Heating/Cooling Valve Control

Chilled Water/Hot Water, 2-Pipe Changeover

Chilled Water/Hot Water or Steam, 4-Pipe

Chilled Water with Electric Heat

HUtWater or Steam Heatin_ Only

HUtWater or Steam with DX Cooling

Chilled Water Cooling Only

Heating/Cooling with Face and Bypass Damper Control

Chilled Water/Hot Water, 2-Pipe Changeover

Chilled Water/Hot Water or Steam, 4-Pipe

Chilled Water with Electric Heat

Hot Water or Steam with DX Cooling

Hot Water or Steam Heating Only

Chilled Water Cooling Only

Heating/Cooling with Humidity Control

F&B Chilled Water/Hot Water or Steam Heating 4-Pipe plus Valve Control Reheat for

Dehumidification

Cooling with Hot Water or Steam Reheat, Valve Control

Chilled Water/Hot Water Reheat, 4-Pipe Valve Control

F&B Chilled Water Coolingwith Hot Water or Steam Valve Control Reheat, 4-Pipe

Non-Water Systems

Electric Heat Only

Electric Heat with DX Cooling

DX CoolingOnly

Table 8 -- Field-Installed Accessories

PACKAGE NO.

33CSKITLST-01

CGCDXSENOOIA00

CGCDXSEN002A00

CGCDXGAS001 A00

HI-39ZZO03

PACKAGE DESCRIPTION

Programmable Linkage Thermostat with Timeclock

Wall-Mounted CO2 Sensor (No Display)

Wall-Mounted CO2 Sensor with Display

CO2 Sensor Calibration Service Kit

Wa_l-Mounted Relative Humidity Sensor

Table 9 -- Factory-Installed Options

CODE DESCRIPTION

DIGIT #15 (2,S,M,4,V) Space Temperature Sensor

DIGIT #15 (1,0,R,3) Changeover Switch

ELECTRIC HEAT

OVER TEMPERATURE

SAFETY (ELECTRIC HEATONLY)S_

FACE AND BYPASS

DAMPER ACTUATOR

OUTDOOR AIR (MAY BE LOCATED ON OPPOSITE

DAMPERACTUATOR _ END OF COMPARTMENT)

DAMPER ACTUATOR(S)

MODULE

RELATIVE

HUMIDITY

SENSOR

(FIELD-

INSTALLED

ACCESSORY)

SPACE

TEMPERATURE

SENSOR _7-

OPTION

t:o t!N

OISCO_NECT

SWITCH

(FACTORY-

INSTALLED

OPTION) CONTROL COMPARTMENT

WITH FACTORY-INSTALLED

OPTIONS SHOWN

LEGEND

ECM -- Electronically Commutated Motor

LLT -- Low-LimitThermostat

ROOM-AIR TEMPERATURE MIXED AIR TEMPERATURE SENSOR

SENSOR (UNIT FILTER REMOVED)

Fig. 9 -- Typical Unit Ventilator Comfort Control Module Sensor, Switch, and Device Locations

Table10-- ControlBoardTerminalDesignations

CONTROL BOARD

TERMINAL

1"/

T1O

Tll

T12

T13

T14

T15

T16

T17

T18

T19

1"20

FUNCTION CONTROL BOARD

TERMINAL

Space Temperature (+) T21

Space Temperature (Gnd) T22

Supply-AirTemperature (+) T23

Supply-AirTemperature (Gnd} T24

Mixed-Air Temperature (+) T25

Mixed-Air Temperature (Gnd) T26

Outdoor-Air Temperature (+) T27

Outdoor-Air Temperature (Gnd) T28

Space Temperature Adjust (+1 T29

Space Temperature Adjust (Gnd) T3O

Nut Used T31

Not Used 1"32

Air Quality (+) T33

Air Quality (Gnd) T34

Relative Humidity (+) T35

Relative Humid_ (Gnd) T36

Fan Status 1"37

Not Used T38

Outdoor Air Enthal WT39

Remote Start/Stop LEGEND

Gnd -- Ground

FUNCTION

Fire/Smoke Status

Freezestat

Changeover

Spare

Common/Ground

24 VDC (External PowerSupply)

Not Available

Cooling First Stage orValve Open

Cooling Common

Cooling Second Stage or Valve Close

Heating FirstStage or Valve Open

Heating Common

Heating Second Stage or Valve Close

OAD Open

CAD Common

CAD Close

Heating Enable

Common

Cooling Enable

OAD -- Outdoor-Air Damper

'!1/I

°°,,

° O

Fig. 10 _Control Switch Location

Unit Ventilator Comfort Control Module Instal-

lation and Field Wiring -- The modale is factory-

installed and factory-wired within the control compartment.

The Unit Ventilator Comfort Control module contains the soft-

ware and microprocessor that operates the unit. It continuously

monitors inputs and controls outputs such as the fan cooling

and heating coil valves and dampers.Refer to Fig. 11 for

wiring diagram connections between the unit's sensors and

actuators and the control module. Direct expansion cooling

and/or electric heat stage control are also provided.

POWER

[] J4RVICE CONNECTOR

CON

T26

_- 2lVdc

T2I

I--_'_'--IT41T31

T61TEl

ANALOGI_5_'--ITsI_1

SENSOR

,NPUT Tic

I-

T32 HEATING

_"_ OUTPUT

_"_'_ MIXEDAIR

T35 DAMPER

I_ OUTPUT

TI_I--

T19 _-_

DISCRETE T20_'_

SWITCH T21_'_

INPUTS T22_'_

_-"_ H_.TING T23_'--

T38 ENABLE T24_-

_-_ COOLING

I_.T=39T ENABLE COMMON

GND T251-_

K3 K2

HI/MED MED/LO K1

FANSPEED FANSPEED FANON/OFF

j-•I

I I

III

I I

[ I I

i i

' r i ......._ OPTIONAL

_ -- -- -- L-_'-_-_--- _""---- -- --"[_ WALL SENSOR

LEGEND

ADJ -- Adjust NC -- Normally Closed

AQ -- Air Quality NO -- Normally Open

CCN -- Carrier Comfort Network_ Controls RAT -- R_turn-Air Temperature Sensor

COM -- Common S/S -- Start/Stop

ENT -- Enthalpy Sensor SAT -- Supply-AirTemperature Sensor

GND -- Ground SPT -- Space Temperature Sensor

MAT -- Mixed-AirTemperature Sensor RH -- Relative Humidity

OA ENTH -- Outdoor-Air Enthalpy TB -- Terminal Block

Outdoor-Air Temperature

OAT -- Sensor

NOTE: Only one SPT sensor can be used. If wall-mounted sensor option isused,

unit-mounted sensor wire to terminal T1 must be removed.

Fig. 11 -- Unit Ventilator Comfort Control Module with Sensor Connections

Sensors

ROOM-AIR TEMPERATURE (RAT) SENSOR-- The RAT

sensor is factory-installed and factory-wired to the control. It

measures the temperature of the air returning to the unit from

the space.

The sensor consists of a thermistor, encased within an

epoxy bead. See Fig. 12. It is mounted behind the front center

panel, where it is hidden from view.

The sensor has a range of -40 to 245 F with a nominal

resistance of 10,000 ohms at 77 E The sensor is connected to

terminals T1 and T2 on the controller board. See Table 11.

Polarity is not a consideration. See Table 10 for resistance vs

temperature values.

SUPPLY-AIR TEMPERATURE (SAT) SENSOR --The SAT

is factory-installed and factory-wired to the control module. It

measures the temperature of the air leaving the unit.

The sensor consists of a thermistor encased within an epoxy

bead. It is mounted in the fan discharge with the probe mount-

ed to sense the air temperature supplied to the room. See

Fig. 12.

The sensor's thermistor has a range of-40 to 245 F with a

nominal resistance of 10,000 ohms at 77 E

NOTE: A temperature of the supply air includes fan heal

In the control box, the sensor wiles are connected to termi-

nals T3 and T4 (SAT) on the controller board (see Table 11).

Polarity is not a consideration. See Table 12 for resistance vs

temperature values.

Fig. 12 -- Room-Air Temperature and Supply-Air

Temperature Sensor (Part No. HN79NZ005)

Table 11 -- Sensor Connections

CONTROL

SENSOR MODULE

PiN NO.

Unit Mounted Room-Air Temperature T1 and 7-2

Sensor (RAT)

Space Temperature Sensor (SPT) Wall T1, 7-9,T19, Shield

Mount (Option)

Supply-Air Temperature (SAT) 1-3and 7-4

Mixed-Air Temperature Sensor (MAT) 1-5and 7-6

Outdoor-Air Temperature Sensor (OAT) T7 and 7-8

Table 12 -- Thermistor Resistance vs Temperature Values for Room-Air Temperature Sensor,

Supply-Air Temperature Sensor, Mixed-Air Temperature Sensor,

and Optional Space Temperature Sensor

TEMP

(C)

--40

-35

-30

-25

-20

-15

-10

-5

TEMP

-31

104

113

122

131

140

149

158

RESISTANCE

(Ohms)

335,651

242,195

176,683

130,243

96,974

72,895

55,298

42,315

32,651

25,395

19,903

15,714

12,494

10,0O0

8,056

6,530

5,325

4,367

3,601

2,985

2,487

2,082

1,752

OUTDOOR-AIR TEMPERATURE (OAT) SENSOR -- The

OAT sensor is factory-installed and factory-wired to the con-

trol. The OAT sensor monitors the temperature of the outside

air entering the unit. See Fig. 13.

The sensor is installed immediately upstream from the

outdoor-air damper where it will accurately sense the tempera-

tare of the outdoor air entering the mixing box. The sensor con-

nects to the conlrol module T7 and T8 (OAT) as shown in

Table 11.

The thermistor has a range of -40 to 245 F and a resistance

of 5,000 ohms at 77 F. See Table 13 for thermistor resistance

according to temperature value.

MIXED-AIR TEMPERATURE (MAT) SENSOR -- The

mixed-air temperature (MAT) sensor is factory-supplied,

factory-installed, and factory-wired with each unit. The MAT

measures the temperature of air in the mixing plenum area.

The MAT connects to terminals T5 and T6 on the con-

trol module using 1/4-in. female quick connect ternnnals. See

Table 11.

The sensor uses multiple thermistor elements. This sensor

provides both mechanical and electrical averaging to achieve

an accurate, average temperature measurement over the entire

element length. Polarity is not a consideration. See Table 12 for

resistance vs temperature values. The sensor is installed in the

mixing plenum before the filter so it can sense the average air

temperature. See Fig. 14.

The MAT has range of-40 to 245 F with a nominal resis-

tance of 10,000 ohms at 77 E

LOW-LIMIT THERMOSTAT-- The low-limit thermostat

(LLT) is factory-installed and factory-wired on all units with

water coils. The thermostat is used to protect the water coils

from freezing temperatures in the event of a malfunction by

detecting the status of a potentially damaging condition.

The LLT is a 12-ft capillary tube mounted in the air stream.

See Fig. 15.

The LLT provides a SPDT contact. The contact provides a

sensor status indication to the control module and an electrical

interlock to the fan and water valves. Upon detection of a fault

condition, the unit ventilator will stop the fan, close the

outdoor-air damper, and position water valves as specified in

the sequence of operation. The LLT is factory set to tripat 38 E

The temperature setting is non-adjustable. The switch will

automatically reset and restart the fan after its temperature has

risen by at least 5 °E

Table 13 -- Thermistor Resistance vs Temperature

Values for Outdoor-Air Temperature Sensor

RESISTANCE

(Ohms)

168,250.0

121,350.6

88,500.0

65,200.0

48,535.0

36,470.0

27,665.0

21,165.0

16,325.6

12,695.0

9,950.0

6,245.0

5,000.0

4,028.5

3,265.0

2,663.3

2,185.0

1,801.5

1,493.0

1,244.0

1,041.5

876.0

739.5

027.5

TEMPERATURE

(F)

-4O

-31

-22

-13

-4

104

113

122

131

140

149

158

167

176

The LLT is designed to trip if any 1-ft section of the capil-

lary tube senses cold air at or below the thermostat setting. The

temperature must exceed 43 F for the thermostat to automati-

cally reset to restore the circuit to normal operation.

REFRIGERANT LOW-LIMIT THERMOSTAT -- The re-

frigerant low limit thermostat (LLR) is factory-installed and

factory-wired on all units with direct expansion coils. The ther-

mostat is used to protect the water coils from freezing tempera-

tures in the event of a malfunction by detecting the status of a

potentially damaging condition.

The LLR is a 18 in. capillary tube mounted in the air stream.

See Fig. 15.

The LLR provides a SPDT contact. The normally closed

contact is connected in series with the direct expansion relay

coil, such that the DX (direct expansion) control relay is

dcenergized hi a fault condition. The LLR is factory set to trip

at 28 E The temperature seaing is non-adjustable. The switch

will automatically reset and allow direct expansion relay opera-

tion when the temperature has risen by at least 5° E

Fig. 13 -- Outdoor-Air Temperature Sensor

(Part No. HH79NZ055)

Fig. 14 -- Mixed-Air Temperature Sensor Installed

in Mixing Plenum (Part No. HH79NZ075)

Fig. 15 -- Low-Limit Thermostat

The LLR is designed to trip if any 1-ft section of the capital-

ly tube senses cold air below the LLR set point. The tempera-

ture must exceed 33 F for the LLR to automatically reset to

restore normal operations.

SPACE TEMPERATURE SENSOR (Factory-Installed

Option) -- The space temperature sensor is used to measure

the building interior temperature. See Fig. 16.

The sensor is shipped with the unit, factory-wired

and factory-mounted in the control swing panel inside the left

hand comparmaent.

If remote temperature sensing is required, then the sensor

may be removed and mounted on an internal wall where

temperature sensed is representative of the entire zone to be

serviced by the unit. The sensor wall plate accommodates the

National Electrical Manufacturers Association (NEMA)

standard 2 x 4 junction box. The sensor can be mounted direct-

ly on the wall surface if acceptable by local codes.

Do not mount the sensor in drafty locations (such as near

air-conditioning or heating ducts), over heat sources (such as

baseboard heaters or radiators), or directly above wall-mounted

lighting dimmers. Do not mount the sensor near a window

which may be opened, near a wall corner, or near a door.

Sensors mounted in these areas will have inaccurate and erratic

sensor readings.

The sensor should be mounted approximately 5 ft from the

floor, in an area representing the average temperature in the

space. Allow at least 4 ft between the sensor and any comer

and mount the sensor at least 2 ft from an open doorway.

Install the sensor as follows (see Fig. 17):

1. Locate the two Allen head screws at the bottom of the

sensor.

2. Turn the two screws clockwise to release the cover from

the sensor wall mounting plate.

3. Lift the cover from the bottom and then release it from

the top fasteners.

4. Feed the wires from the electrical box through the open-

ing in the center of the sensor mounting plate.

5. Using two no. 6-32 x 1 mounting screws (.provided with

the sensor), secure the sensor to the electrical box.

6. Use a three-conductor 20 gage shielded cable. The wire is

suitable for distances of up to 500 ft. The standard CCN

(Carder Comfort Network®) communication cable may

be used. If the set point adjustment (slide-bar) is not re-

quired, then an unshielded, 18 or 20 gage, two-conductor,

twisted pair cable may be used.

The CCN network service jack requires a separate,

shielded three-conductor CCN communication cable.

Always use separate cables for CCN communica-

tion and sensor wiring. (Refer to Fig. 18 for wire

designations.)

7. Replace the cover by inserting the cover at the top of the

mounting plate first, then swing the cover down over the

lower portion. Rotate the two Allen head screws counter-

clockwise until the cover is secured to the mounting plate

and locked in position.

For more sensor information see Table 12 for thermistor

resistance vs temperature values.

NOTE: Clean sensor with damp cloth only. Do not use

solvents.

Fig. 16 -- Space Temperature Sensor

(P/N HH51BX005)

3.28

CLEARANCE HOLES FOR

(2)#SMOUNTING

SCREWS ON CENTERLINE

.79 _F 115

NOTE: Dimensions are in inches.

Fig. 17 -- Space Temperature Sensor and

Wall-Mounted Humidity Sensor Mounting

WIRING THE SPACE TEMPERATURE SENSOR AND

SET POINTADJUSTMENT--To wire file sensor and

slidebar, perform file following (see Fig. 18):

1. Identify which cable is intended for sensor wiring.

2. Strip back the jacket from the cables at least 3 inches.

Strip q4-in, of insulation from each conductor. Cut the

shield and dram wire from the sensor end of the cable.

3. Connect the sensor cable as follows:

a. Install a jumper between the two center terminals

(SEN and SET).

b. Remove file existing factory-connected wire on

terminal T1 of the control module.

c. Connect one wire from the cable (RED) to the TI

terminal on the controller. Connect the other end

of the wire to the SEN terminal without the

jumper wire.

d. Connect another wire from the cable (BLACK) to

the T10 terminal on the controller. Connect the

other end of the wire to the remaining jumpered

SEN terminal.

e. Connect the remaining wire (WHrrE/CLR) to the

T9 terminal on the controller. Connect the other

end if the wire to the remaining open terminal on

the SET terminal block.

f. In the control box, install ano. 6 ring type crimp

lug on the shield drain wire. Install this lug under

the mounting screw in the upper right comer of

the controller (just above terminal T1).

WIRING THE CCN NETWORK COMMUNICATION

SERVICE JACK -- To wire the service jack, perform the

following:

1. Strip back the jacket from the CCN communication ca-

ble(s) for at least 3 inches. Strip l/4-in, of insulation from

each conductor. Remove the shield and separate the drain

wire from the cable. Twist together all the shield drain

wires and fasten them together using a closed end crimp

lug or a wire nut. Tape off any exposed bare wire to pre-

vent shorting.

2. Connect the CCN + signal wire(s) (RED) to Terminal 5.

3. Connect the CCN - signal wire(s) (BLACK) to Ter-

rffmal 2.

4. Connect the CCN GND signal wire(s) (WtffI'E/CLR) to

Terminal 4. Before wiring file Rill plug refer to Carrier

Comfort Network@ Interface, page 38 for communica-

tion bus wiring and cable selection. The cable selected

must be identical to the CCN communication bus wire

used for the entire network.

The other end of the communication bus cable must be

connectod to the remainder of the CCN communica-

tion bus. If the cable is installed as a T-tap into the bus,

the cable length cannot exceed 100 ft. Wire the CCN

service jack of the sensor in a daisy chain arrangement

with other equipment. Refer to Cartier Comfort

Network Interface section, page 38 for more details.

LINKAGE THERMOSTAT (Field-Installed Accessory) --

The linkage thermostat can be used to control multiple units

(up to 8 different sizes and types) from a single thermostat,

provide occupancy scheduling for any number of units (all

opamting on the same schedule), and broadcast the changeover

switch status (2-pipa systems) to all units in file system

(Fig. 19). The thermostat is equipped with two liquid crystal

displays (LCD). One LCD is used to display the set points,

space temperature, unit operating mode (Heating, Cooling, Off,

etc.), and discharge air temperature from the unit. The second

LCD displays the time and day of the week. The thermostat has

pushbutton keys to enter the temperature set points, program

file occupancy schedule, program holidays, set time, day, and

date, and configure file functionality of the device.

When the thermostat provides local occupancy and set point

scheduling for these units, it provides a Temperature Compen-

_ted Start feature which starts the unit(s) prior to file scheduled

occupied time in order for file space to achieve the occupied set

point temperature at file occupied time.

The thermostat uses CCN communications to provide the

required information exchange between the thermostat and file

unit's controls.

The thermostat can be used to provide global occupancy

scheduling for any number of units when aCCN user interface

is not provided. In this mode, a 3-wire communication bus

connected between each unit and the thermostat a!lows a user

to program and change equipment occupancy scheduling and

holidays from a single location without requiring the use of a

personal computer. This allows any number of unit ventilators

equipped with the Unit Ventilator Comfort Control module to

operate to a common occupancy schedule (all controllers must

be connected to a single CCN communication bus). Each Unit

Ventilator Comfort Control module will use its own set points

and space temperature settings.

The linkage thermostat can broadcast the value of an equip-

ment status point to all units connected to the communication

bus. The pomt name must be configured using a CCN Service

Tool at installation. A typical example is to broadcast file status

of file changeover switch (2-pipe systems) or a field-supplied

and field-installed outdoor-air enthalpy sensor from the one

unit where the sensor is installed to all other units. This action

reduces the installation cost and operating maintenance of the

entire system.

When used to provide Global Occupancy Scheduling or

Broadcast, file thermostat does NOT need to be mounted in any

specific space. The thermostat can be mounted anywhere in a

conditioned area as long it is connected to file CCN communi-

cation bus.

The linkage feature allows several units to operate from a

single common thermostat. This feature can be used if multiple

units serve a single common area. The thermostat must be

mounted in the common area space for this feature.

Thermostat Mounting Location -- DO NOT mount the sen-

sor in drafty locations (such as near air conditioning or heating

ducts), over heat sources (such as baseboard heaters or radia-

tors), or directly above wall mounted-hghting dimmers. DO

NOT mount file sensor near a window which may be opened,

near a wall comer, or near a door.

Sensors mounted in these areas will have inaccurate and

erratic sensor readings. The sensor should be mounted approxi-

mately 5 ft from the floor, in an area representing the average

temperature in the space. Allow at least 4 ft between the sensor

and any comer and mount the sensor at least 2 ft from an open

doorway. Follow the mounting and wiring inslructions includ-

ed with file thermostat for proper thennostat installation.

OVERRIDE

PUSHBUTrON

LEGEND

CCN -- Carrier Comfort Network_

COM -- Common

GNO -- Ground

SENSOR PC

BOARD

JUMPER TERMINALS

AS SHOWN

SET SEN

CCN

SERVICE

CONNECTOR

SET POINT

ADJUSTMENT

THERMISTORTEMPERATURE

SENSOR

Fig. 18 -- Space Temperature Sensor Wiring

9mtl

Fig, 19 -- Linkage Thermostat

Thermostat Power Supply -- The thermostat power supply,

included in the accessory package, provides the required

DC voltage to operate the thermostat, The power supply

includes 24 vac (Class II) transformer.

The transformer and power supply can be mounted within

the unit's control enclosure.

Wiling between the thermostat and the power supply is

limited to 100 ft maximum, fflonger distances am required, the

power supply and Wansformer must be remotely mounted

closer to the thermostat. Be sum to follow all code require-

merits when remotely mounting the transformer as the primary

wiring is Class 1 circuit type. The thermostat power wiring

requires the use of a 2-conductor, 18 AWG, twisted pair cable

to connect the power supply output ternunals to the thermostat.

Follow the installation instructions shipped with the thermostat

for proper installation.

Thermostat Communication Wiring -- The thermostat uses

CCN network communications to exchange data between the

thermostat and the equipment control or the CCN network for

system f_nctions. Use 3-conductor, 20 AWG (American Wire

Gage) minimum, shielded cable as specified in the Carrier

Comfort Network® Interface section. See Table 14.

Thermostat Remote Room Sensor Option -- The installer

has the option of mounting the thermostat in a mechanical

closet or other location in order to limit access to the device. A

remote sensor option can be installed in the space to properly

sense temperature at the occupied location. Refer to the instal-

lation instructions shipped with the thermostat for additional

information on this option.

Table 14- CCN Cable Requirements

MANUFACTURER CABLE NO,

Alpha 2413 or 5463

American A22503

Belden 8772

Columbia 02525

INDOOR AIR QUALITY (IAQ) SENSOR (Field-Installed

Accessory) -- The wall-mounted sensor monitors CO2 in the

conditioned air space, and uses infrared technology to detect

the levels of CO2 present in the air. See Fig. 20. This informa-

tion is used to modify the position of the outdoor-air dampers

to admit more outdoor air as required to provide the desired

ventilation rate. The sensor is available with or without an

LCD readout to display the CO2 level in ppm. Sensor acces-

sory descriptions and part numbers are shown in Table 15. To

mount the sensor, refer to the installation insa'uedons shipped

with the accessory kit.

Table 15 -- Indoor Air Quality Sensor Accessories

CO= SENSOR ACCESSORY DESCRIPTION

PART NUMBERS

CGCDXSENOOlAOO Wall Mount Sensor (No Display)

CGCDXSEN002AO6 Wall Mount Sensor with Display

CGCDXGAS001 A00 Sensor Calibration Service Kit

The CO2 sensors in Table 15 are all factory set for a range of

0 to 2000 ppm and a linear voltage output of 2 to Ill vde.

Fig. 21 shows ventilation rotes for various CO2 set points when

a typical CO2 level of 350 ppm is used. Refer to the instruc-

tions supplied with the CO2 sensor for electrical requirements

and terminal locations. Aseparate isolated field-supplied trans-

former is required to provide power to the sensor.

Any changes to the factory configuration of the sensor

require use of the User Interface Program (UIP), which is

included in the sensor calibration service kit.

The sensor must be properly located to accurately measure

die air quality of the occupied space. It should be mounted in a

location that will avoid direct breath contact.

Do not mount the sensor in drafty areas such as near the unit

discharge, open windows, fans, or over heat sources. Allow at

least 3 ft between the sensor and any comer. Avoid mounting

the sensor where it is influenced by the supply air; the sensor

gives inaccurate readings if supply air is blown directly onto

the sensor.

I U U U LSU_U _

ooooooc

ooooc

oooc

5.625

(14.3)

NOTE:Dimensionsarein inches.

Dimensionsin ( ) are incentimeters.

(12.7)

Fig. 20 -- Indoor Air Quality (COz) Sensor

(PN 33ZCSENCO2)

700 9(X] 1100 1300 1500 1700 1900 2100 2300 2500

CO 2CONCENTRATION (PPM)

Fig. 21 -- Ventilation Rates Based on

CO2 Set Point

Air Quality Sensor Wiring -- To wire the sensor after it has

been mounted in the conditioned space, see Fig. 22 and the

installation instructions shipped with the sensor. For each

sensor, use 2-conductor 18 AWG twisted-pair cables

(unshielded) to connect the separate isolated 24 vac power

source to the sensor and to connect the sensor to the control

board terminals.

To connect the sensor to the control board, identify the

positive (+) and negative (-) output terminals to the sensor

te_M block and connect the positive terminal to terminal

T13. Connect the negative terminal to terminal TI4 on the

control board. Mount a field-supplied Class I], 24 vac trans-

former with a 40 va rating in a suitable location inside the unit's

control box. Whe the transformer primary to line voltage

power after any fuses and disconnect switches. Ensure the

transformer primary voltage rating matches the unit's voltage

rating. Refer to the wire label diagram shipped with the unit.

Connect one of the transformer secondary leads to the 24 vac

power terminal of the sensor. Connect the remaining secondary

lead to the ground terminal sensor.

[ [RV,DECONNECTOR

CCN

T26

I_ 24Vdc

T61 -

A, LO T31Y__

SENSOR

,NP -rs O1 _1--

T11 }---

"{'32 HEATING

T_I_T OUTPUT

_'_" MIXED AIR

T3 DAMPER

I'_ OUTPUT

Tl_i--

T18 _----

T19_-_

DISCRETE T20_'_

SWITCH T211"_

INPUTS T221_

_"_. HEATING T23_

T38 ENABLE T241"_

I'_ COOLING

__T39 TENABLE COMMON

GND T25_'_

K3 1(2

HI/MED MED_.O K1

FAN SPEED FAN SPEED FAN ON/OFF

co. co. OM

........ FIELD SUPPLIED

ISOLATED 24VAC

POWER SOURCE

LEGEND

ADJ -- Adjust

AQ -- Air Quality

CGN -- Carrier Comfort Network_

COM -- Common

GND -- Ground

MAT -- Mixed-Air Temperature Sensor

OA ENTH -- Outdoor-Air Enthalpy

OAT -- Outdoor-Air Temperature Sensor

NC -- Normally Closed

NO -- Normally Open

RAT -- Return-AirTemperature Sensor

S/S -- Start]Stop

SAT -- Supply-AirTemperature Sensor

SPT -- Space Temperature Sensor

RH -- Relative Humidity

Fig. 22 -- Air Quality Sensor Wiring

RELATIVE HUMIDITY SENSOR (Field-Installed Acces-

sory) -- The relative humidity (RH) sensor is used to measure

die relative humidity of die air within the occupied space. The

sensor is ordered separately from the unit, is field-installed and

should be wired in the control compartment below the control

module. It may be mounted directly on an interior wall if

acceptable by local codes. See Fig. 23.

The sensor uses bulk polymer resistance technology, which

eliminates the effect of surface contamination and helps to

maintain sensor accuracy over a long period of time. It has a

long-term stability of less than 1% drift per year.

The relative humidity sensor has a range of 10 to 90% with

an accuracy 0f+_3% at 77 E It generates a 2 to 10 vde signal

which is sent to the controller.

If the sensor is installed directly on a wall surface, install the

humidity sensor using 2 screws and 2 hollow wall anchors

(field-supplied); do not overtighten screws. See Fig. 17. The

use of a standard 2 x 4-in. electrical box to accommodate the

wiring is recommended for installation.

DO NOT touch the sensing element or clean with chemical

solvents; they can permanently damage the sensor.

The sensor must be mounted vertically on the wall. The

Carrier logo should be oriented correctly when the sensor is

properly mounted.

DO NOT mount the sensor in drafty areas such as near the

unit's discharge grille, open windows or fans, or over heat

sources such as baseboard heaters, radiators, or wall-mounted

light dimmers. Sensors mounted in those areas will produce

inaccurate readings.

Avoid comer locations. Allow at least 4 ft between the

sensor and any corner. Airflow near comers tends to be

reduced, resulting in erratic sensor readings.

Sensor should be vertically mounted approximately 5 ft up

from the floor.

For distances up to 500 feet, use a 3-conductor shielded,

20 AWG cable. A CCN communication cable can be used. The

shield and drain wire must be removed from the sensor end of

the cable. See Fig. 24 for wiring details.

The power for the sensor is provided by the control board.

The board provides 24 vdc for the sensor. No additional power

source is required.

To wire the sensor, perform the following:

1. At the sensor, remove 4-in. of jacket from the cable. Strip

ll4-in, of insulation from each conductor. Route the cable

through the wire clearance opening in the center of the

sensor. See Fig. 24.

2. Connect the RED wire to the sensor screw terminal

marked (4-).

10.

11.

Install one lead from the resistor (supplied with the sen-

sor) and the WHITE wire, into the sensor screw terminal

marked (-). After tightening the screw terminal, test the

connection by pulling gently on the resistor lead.

Connect the remaining lead from the resistor to the

BLACK wire and secure using a closed end type crimp

connector or wire nut.

Using eleetrical tape, insulate any exposed resistor lead to

prevent shorting.

At the control end, remove the jacket from the cable and

route the RED conductor over to the left side of the con-

_rol board. Route the remaining conductors to the right

side of the control board.

S_p V4-in. of insulation from each conductor and equip

each with a V4-in. female quick connect terminal.

Connect the RED wire to terminal T26 on the control

board.

Connect the BLACK wire to terminal T16 on the control

board.

Connect the WHITE/CI_AR wire to terminal T15 on the

control board.

Equip the shield wire with ano. 8 fork-type lug and

secure to the control module mounting screw between

terminals TI6 and T17.

Fig. 23 -- Wall-Mounted Relative Humidity Sensor

(Part No. HL39ZZ003)

[] RV,CEOON.ECTOR

T26

--_"_ 24Vdc

T2 __

T4 -

T5_-_

T6 I-

ANALOG _T8 _"

SENSOR

INPUT_T101_t'--

_T14T__ I-'-

T32 HEATING

_]_ OUTPUT

I--_ MIXED AiR

T35 DAMPER

I_ OLITPUT

FANSTA_.II

OA ENT_"

DISCRETE S_3

SWITCh{ FIRE SMOK

INPUTS LOWLIMI-- F2,?._

T37 HEATING

F24_'_

T38 ENABLE

_"_ COOLING COMMON

_.___.T ENABLE GND T25_-_

K3 K2

HI/MED MED/LO K1

FAN SPEED FAN SPEED FAN ON/OFF

LEED- .......

•_W..HiJ_E ......

......

/3 CONDUCTOR

_" ...... 20AWG SHIELDED

SHIF.LD GABLE

Tl_

TI9 _-_

F20_"

T21_'_

RESISTOR

W/SSUPPLIED

ENSOR)

tUMIDITY SENSOR

LEGEND

ADJ -- Adjust

AQ -- Air Quatity

CCN -- Carrier Comfort Network_

COM -- Common

GND -- Ground

MAT -- Mixed-Air Temperature Sensor

OA EN'fl-I -- Outdoor-Air Enthalpy

OAT -- Outdoor-Air Temperature Sensor

NC -- Normally Closed

NO -- Norma_y Open

RAT -- Return-Air Temperature Sensor

S/S -- Start/Stop

SAT -- Supply-AirTemperature Sensor

SPT -- Space Temperature Sensor

RH -- Relative Humidity

Fig. 24 -- Wiring of Relative Humidity Sensor to Control Board

CHANGEOVER SWITCH (Factory-Instalhid Option) --

The changeover switch is used with 2-pipe changeover units to

determine if the temperature of the water in the water loop can

provide cooling or heating (Fig. 25). The switch provides this

input to the control. The changeover switch is factory-wired to

the control and ready for field mounting to the water piping.

The switch mounts to the water pipe using a spring-loaded

clamp.

It is primarily used for a stand-alone application, although

the changeover switch may be required for CCN applications if

the water temperature status is not available through the

network. For stand-alone applications, one switch is required

for each 2-pipe unit. If the units are connected together on a

3-wire CCN communication bus and a linkage thermostat

(or Unit Ventilator Comfort Control module [P/N 110500]) is

used, then a single switch can be connected to any one unit and

the linkage thermostat can be configured to broadcast the

switch status to all other units.

IMPORTANT: The switch must be mounted on the

supply water pipe, where water flows continuously to

accurately sense the available water temperature. Never

mount the sensor on piping which is connected to a

2-way valve.

FILTER/SMOKE STATUS (CCN Systems Only) -- The

filter/smoke status is monitored by the control module and

contains an adjustable alarm limit. The control accumulates

fan-operating hours; when the total hours exceed the limit, an

alarm is generated.

The alarm limit is adjustable from 100 to 9900 hours. It is

factory preset to 1500 opumting hours. The limit is normally

field adjusted and is dependent on the fdter media used as well

as the quality and amount of outdoor air required. The normal

range is from 400 to 1500 hours.

Carrier Comfort Networke Interface --The Carrier

Comfort Network (CCN) communication bus wiring is

supplied and installed by the electrical contractor. It consists of

shielded, 3-conductor cable with drain wire.

The system elements am connected to the communication

bus in a daisy-chain arrangement. The positive pin of each

system element communication connector must be wired to the

positive pins of the system element on either side of it; the

negative pins must be wired to the negative pins; the signal

ground pins must be wired to signal ground pins. See Fig. 26

for location of the CCN communication connector (NET-

WORK) on the control module.

NOTE: Conductors and drain wire must be 20 AWG mini-

mum, stranded tinned copper. Individual conductors must be

insulated with PVC, PVCh_ylon, vinyl, Teflon, or polyethyl-

ene. An aluminorrdpolyester 100% foil shield and an outer

jacket of PVC, PVC/nylon, chrome vinyl, or Teflon with a

minimum operating temperature range of -20 C tu 60 C is

required. See Table 14 for cables that meet the requirements.

When connecting the CCN communication bus to a system

element; a color code system for the entire network is recom-

mended to simplify installation and checkout. The following

color code is recommended:

CCN BUS

SIGNAL CONDUCTOR CCN

TYPE INSULATION CONNECTOR

COLOR

+ RED 1

Ground WHITE 2

BLACK 3

Fig. 25 -- Changeover Switch

RJ-14

SERVICE -'-'-'-q

JACK

CCN

CONNECTOR

POWER

[] SERVICE

-i_l iNETWORK

Fig. 26 -- CCN Communication Connector

If acable with a different color scheme is selected, a similar

color code should be adopted for the entire network.

At each system element, the shields of its communication

bus cables must be tied together. If the communication bus is

entirely within one building, the resulting continuous shield

must be connected to ground at only one point. See Fig. 27. If

the communication bus cable exits from one building and en-

ters another, the shields must be connected to ground at the

lightning suppressor in each building where the cable enters or

exits the building (one point only).

To connect the control to the network, proceed as follows

(Fig. 27):

1. Tuna power to the control box OFF.

2. Remove the CCN connector from the control board.

3. Cut the CCN wire and strip the ends of the RED,

WHITE, and BLACK conductors.

4. Using a wire nut, connect the 2 drain wires together.

5. Insert and secure the 2 RED wires to terminal 1 of the

CCN connector.

6. Insert and secure the 2 WHITE wires to terminal 2 of the

CCN connector.

7. Insert and secure the 2 BLACK wires to terminal 3 of the

CCN connector.

8. Replace connector on control board.

9. Turn on power to control box.

---GROUND

DRAIN WIRE

BLACK

WHITE @

RED

CON TOR

DRAIN WIRE /_ DRAIN WIRE

BLACK BLACK

WHITE _WHITE

RED RED

co. OR

UNIT VENTILATOR UNIT VENTILATOR UNIT VENTILATOR

1000 FT MAXIMUM

LEGEND

CCN -- Carrier Comfort Network

Fig. 27 -- CCN Communication Wiring

UNIT VENTILATOR

Relays -- The fan relays am an integral component of the

control board. The fan motor speed control uses three SPDT

relays. The control relays am shown in Fig. 24. See the funow-

ing sections for a description of how the control relay is used

with each function.

FAN RELAY -- The fan relay (K1) is factory-wired and

factory-installed on all units. The relay interfaces with the

Electronically Commutated Motor (ECM) motor control

circuit and automatically starts and stops the fan.

FAN SPEED RELAYS -- The fan speed relays, I(2 and K3,

select the operating speed of the fan (High/Medium/Low). The

fan speed relays am factory-wired and factory-installed. These

relays control the speed of the motor.

Actuators

MODULATING OUTDOOR-AIR DAMPER ACTUATOR

(Fig. 28)--The outdoor-air damper actuator is factory-

supplied and factory-installed directly on the damper jackshaft.

All wiring between the actuator and the control is provided by

the factory. The actuator is mounted so that the spring return

will close the outdoor-air damper and open the return-air

damper on loss of power.

The actuator consists of an electronically controlled revers-

ible motor equipped with a microprocessor drive. The damper

actuator is supplied with approximately 8 ft of plenum rated

cable.

The actuator is capable of holding its position at any point in

the stroke and moving the damper in either direction.

The actuator is powered by the fused 24 vac transformer

located in the control box.

FACE AND BYPASS DAMPER ACTUATOR (Fig. 29) --

The actuator provides 35 in.-lb torque rating and is powered by

the 24-vac transformer located in the control box.

Face and bypass dampers am factory-supplied and factory-

installed on all face and bypass damper applications. These

actuators am proportional modulating, direct shaft mount type,

capable of being driven in either direction and holding position

at any point in the travel range.

The actuators are supplied with plenum rated cable.

Actuator connections depend on the application. Refer

to Application Data manual and wire label diagram for wiring

information.

The actuator is equipped with a SPDT damper end switch,

which senses when the damper is in the full bypass position.

The switch position is adjusted so that the switch closes

when the damper moves about 5degrees from the full bypass

position.

FIELD-SUPPLIED TWO-POSITION RELIEF DAMP-

ER- A field-supplied relay is required m wire a field-

supplied two-position damper or ventilation unit, such as a heat

recovery ventilator (HRV) or energy recovery ventilator (ERV)

to the control module. A SPST normally open relay, such as

HB61KK324, must be field-installed and wired for use with

the field-supplied damper actuator or ventilation unit.

Using 18 AWG twisted cable, connect the relay coil con-

tacts to the control terminals J1-2 and T34. See Fig. 24 and 30.

To connect a field-supplied two-position damper actuator,

(Fig. 30), connect one contact of the actuator to the normally

open contact of the relay. Connect the common contact of the

relay to one leg of the power source. Connect the other contact

of the actuator to the outer leg of the power source.

24VA_CS_,SOHz

SVA 2_J

Co.tml

Fig. 28 -- Modulating Outdoor-Air Damper

Actuator (Part No. HF23BJ040)

HF23BJ039

$2_ $2_1 3_ in4b {4 Nm)

g3 N3 _ .111_s _

3VA _ LA_21_

Fig. 29 -- Face and Bypass Damper

Actuator (Part No. HF23BJ039)

FIELD-SUPPLIED r- -

DAMPER HRV OR

ERV

(HN61 KK324 RELAY SHOWN)

SEPARATE ISOLATED

POWER SOURCE

(24, 120, OR 240 VAC.)

[

(BLK) _--] J1

(RED)

_'_ CONTROLBOARD

ITERMINAL

LEGEND

ERV -- Ener Recovery Ventilator

HRV Heat_ecovery Ventilator

Field Wiring

Fig. 30 -- Two-Position Minimum Outdoor-Air Damper Relay

Direct Expansion (DX) Cooling -- The Unit Venti-

lator Comfort Control module is designed to provide up to

2 stages of capacity control for direct expansion (DX) cooling

applications. The control can be interfaced with condensing

units, unloader solenoid valve, hot gas bypass valves, and liq-

uid line solenoid valves. In these applications, the stages of DX

capacity are controlled to maintain the space temperature at the

cooling set point. Typically, compressor stages and liquid line

solenoid valves operate normally open, while unloaders and

hot gas bypass valves operate normally dosed (see Fig. 31).

The Unit Ventilator Comfort Control module provides a

SPDT relay contact for the first stage of DX cooling. These

contacts are designed to switch up to 1 ampere of power (24 to

277 vac at 60 Hz).

Each DX output is configured to provide a minimum off

time of 5 minutes after being deenergized. This Time Guard

control feature allows the refrigerant pressures to equalize after

a compressor shutdown, thereby protecting compressors from

damage caused by starting with excessive loads. The "time

Guard control can be disabled if the stage is used to control a

solenoid valve or unloader.

OUTDOOR-AIR TEMPERATURE (OAT) LOCKOUT --

An outdoor-air temperature lockout is provided to disable all

DX cooling. The control compares the outdoor-air temperature

to the user-adjustable DX outdoor air lockout set point.

Whenever the OAT drops below die set point, all stages of DX

cooling are disabled.

The outdoor-air lockout feature is used to ensure the

condensing unit does not operate below its designed minimum

outdoor temperature.

DX System Design -- Recommendations for basic DX

system design and piping should always be followed and are

available in the Carrier System Design manual.

The Unit Ventilator Comfort Control module maintains the

space temperature at the cooling set point by operating the DX

stages as the space load requires. Configuration requirements

for systems using DX components vary according to the

system design.

IMPORTANT: Never oversize die condensing unit. ]

For units equipped with CCN controls, condensing units

should be sized for medium speed airflow unless a hot gas

bypass valve or two-stage condenser is supplied.

Several staging control examples for typical DX applica-

tions are shown in Examples 1-3. Use a service configuration

tool to configure the number of stages and the logic type and

'l]rne Guard control features. See Set-Up, Configuration and

Operation section on page 46 for further configuration details.

Example I -- Single-Stage Single Condensing Unit

STAGE STAGE LOGIC TIME GUARD

NUMBER TYPE TYPE FUNCTION

1 Compressor Normal Enabled

2 Hot Gas Inverted Disabled

Example 2 -- Two-Stage Single Condensing Unit

STAGE STAGE LOGIC TIME GUARD

NUMBER TYPE TYPE FUNCTION

1Compressor Normal Enabled

Electric Inverted Disabled

2 Unloaderno.1"

*Optional, basedonthesystem designorhotgas bypass.

Example 3 -- Condensing Unit with

Two-Speed Compressor

STAGE

NUMBER

STAGE LOGIC

TYPE TYPE

Compressor Normal

or Low Speed

Compressor Normal

or Hi_ihSpeed

TIME GUARD

FUNCTION

Enabled

The preceding examples are typical; however, staging for

each system is unique. Staging is for capacity control only and

does not eliminate any components required for safety or by

recommended system design. Follow equipment application

and installation instructions for sizing, location of electrical

connections, and required components such as liquid-line

solenoid valves used for refrigerant isolation, and thermostatic

expansion valves.

NORMALLY OPEN CONTACT TERMINALS

CLOSED

CONTACT

TERMINALS

COIL TERMINALS

RELAY CONTACT RATINGS

48vaat 24vac 0.25 pewer factor I

125 va at 115 vac 0.25 power factor

230 va at 230 vac 0.25 power factor

Fig. 31 -- DX Control Relay (Part No. HN61KK324)

Electric Heat -- Two control relays am factory-supplied,

factory-instal]e.d and factory-wired to provide staging control

for electric heater applications. They am used to operate the

electric heater elements in two stages. The relays are installed

inside the electric heat control compartment. The heater circuit

connections depend upon the actual number of heater elements

provided. The Unit Ventilator Comfort Control module pro-

rides two stage electric heat control capability unless only one

element is provided.

The control operates the heater stages as required, but pre-

vents the discharge air temperature from exceeding 140 F at

any time.

The first stage is wired so that it operates between 33 to

50 percent of the total heater capacity. Refer to Table 16 for

heater element circuit connections.

Remote Start -- The remote start input is used to switch

the control operating mode from the unoccupied to the occu-

pied state by means of a contact closure from an external con-

trol system or an electro-mechanical time clock device. The

control device must provide an isolated single-pole contact.

Whenever the contact is closed and 24 vac is present on T20,

the control will operate in the Occupied mode.

Using 18 or 20 AWG wire, connect the remote start termi-

nal (T20) to one side of the remote contact. Connect the other

side of the contact to TB.

If a solid-state contact is provided by the control device,

then a field-supplied and field-installed load resistor may be

necessary to ensure reliable operation of the input. To ensure

proper operation, use a digital volt meter (DVM) and measure

the AC voltage between T20 and T25 with the external contact

in the OFF or open position.

The input will operate properly if the AC voltage is less than

1vac, otherwise a load resistor must be connected across termi-

nals T20 (remote start input) and T25 (ground). Typically, a

single 1000 ohm, 2 watX resistor will reduce the voltage suffi-

ciendy for most sohd-state contacts. If not, add additional resis-

tors, one at a time, until the voltage measured is below 1 vac.

Because the resistors heat when operating, die devices should

be permanently mounted to a field-supplied terminal strip and

20 AWG wire rated for at least 90 C should be used to connect

the resistor(s) to contrul terminals q'20 and T25.

Fire/Smoke Status Input -- The Fire/Smoke Status

Input is used to identify that a fan has stopped its normal opera-

tion due to an alarm condition at a local fire or smoke detector.

This input must be used in conjunction with a normally closed

contact which is wired into the fan motor control circuit.

A double-pole double-throw (DPDT) relay, part number

HN61 KK324, is recommended. One set of the relay contacts is

wired into the fan motor circuit and the other set is wired to the

control inpuL The control box provides 24 vac power for the

relay. The relay is controlled by a separate isolated contact set

from the smoke or fire detector.

All wiring from the detector should be appropriately rated

for the application and must comply with NEC, NFPA (Nation-

al Fire Protection Association) and any local codes.

SMOKEJFTRE DETECTOR WIRING (Normally Open

Contact Set) -- Perform the following procedure to wire the

smoke/fire detector:

1. Use 15 AWG wire rated for 600 vac for all wiring.

Eight 1&-in. insulated female quick-connect type lugs

are required.

2. Connect a wire from TB to one of the detector contact

terminals.

3. Connect the other detector contact terminal to the relay

coil terminal no. 1.

4. Connect die other coil terminal, no. 3, to ground in the

control box.

5. Connect the normally closed contact set (relay termi-

nals no. 5 and no. 6) to the fan motor wiring as shown

on the label diagram.

6. Connect one of the normally open relay contacts, ter-

minal no. 2, to TB (24 vac).

7. Connect the other side of the contact, terminal no. 4, to

T21 on the control module.

SMOKE/FIRE DETECTOR WIRING (Normally Closed

Contact Set) -- Perform the following procedure to wire the

smoke/fire detector:

1. Use 15 AWG wire rated for 600 vac for all wiring.

Eight lk-in, insulated female quick-connect type lugs

are required.

2. Connect a wire from TB to one of the detector contact

terminals.

Connect the other detector contact terminal to the relay

coil terminal no. 1.

Connect the other coil terminal, no. 3, to ground in the

control box.

5. Connect the normally open contact set (relay terminals

no. 2 and no. 4) to the fan motor wiring as shown on

the label diagram.

6. Connect one of the normally closed relay contacts, ter-

minal no. 5, to TB (24 vac).

7. Connect the other side of the contacL terminal no. 6, to

T21 on the control board.

TOTAL NO.

OF HEATER

CIRCUITS

Table 16- Heater Element Wiring

NO. OF CIRCUITS

CONTROLLED

BY STAGE 1

STAGE 1

CAPACITY _'/o)

NO. OF CIRCUITS

CONTROLLED

BY STAGE 2

STAGE 2

CAPACITY(%)

Valves

WATER VALVES--Water valve assembfies are shipped

with the unit for field installation. All factory-suppfied valves

are fully modulating and capable of being positioned at any

point within the travel range of the valve. Each valve is

shipped complete with an actuator and any required linkage.

The equal percentage characteristics of the modulating

valves provide close temperature control on heating, cooling or

reheat unit ventilator coils.

In case of power failure, a return spring sends the valve to

its normal position. The normal position is defined for each

control sequence.

Water Valve Actuators -- Water valve actuators are factory-

mounted on factory-supplied valve assemblies. The valve and

actuator assemblies are modulating spring retom for all water

and steam applications. Valves am factory supplied.

All valves use actuators with reversible electric motors. The

control provides proportional control to the electric motor

which receives a tri-state signal from the control

All valves have a spring retain feature that allows them to

retorn to a normal positions (normally closed) upon loss of

power.

All valve assemblies have electrically powered actuators.

Each actuator is factory-wired and operates its valve through a

linear stroke.

Each water valve actuator features a magnetic clutch to ex-

tend the life of the motor and gear train. A manual override le-

ver and position indicator facilitates field setup.

To prevent electric shock and equipment damage, discon-

nect the power to the control before performing any work

on valve assemblies.

On chilled water or hot water applications, the valve actua-

tors can be mounted in any position above the center line of the

valve body. For steam applications, mount the actuator above

the centerline of the valve body and at least 45 degrees from

veltiCal. This position prevents exposing the actuator to ex-

treme heat. Refer to Fig. 32.

The manual positioning lever on all water valves should

only be used when controller power is OFF. DO NOT

attempt to move this lever when controller power is

applied. If the position lever does not move freely for man-

ual positioning when the power is off, remove the valve

cover and push the solenoid plunger down using a small

screwdriver inserted in the slot below the solenoid.

DO NOT install valve assembly where excessive moisture,

corrosive fumes, and/or vibration am present.

INSTALL all 2-way valve assemblies so that they close

against system flow. Proper flow direction is from inlet

"BPort" to outlet "APort'.

ALWAYS install 3-way mixing valve with 2 inlet flows

and one outlet. Proper flow direction is: inlet "B Port' to

coil. Inlet 'A Port" to supply. "Common Port' to return. See

Fig. 33.

Water Valve Wiring- Valve wiring is determined by the

actual valve selected and the control sequence.

All valves are factory-wired to the control module and

tested.

Water valve specifications and dimensions are found in

Table 17 and Fig. 34.

DO NOT MOUNT

VALVE HERE 45 °MINIMUM/

VERTICAL 90 _MAXIMUM

FROM VERTICAL

Fig. 32 -- Valve Mounting Angle for

Steam Heating Applications

Table 17 -- Water Valve Specifications

FEATURE

Application

FluidTemperature I Minimum

IMaximum

Flow Type

Static PressureLimits

Current Requirement (24 V Supply)

J Body

Stem

Material Seat

Plug

Actuator

MaximumAmbientTemperatureand Humidity

Voltage

Actuator Power

Connections

Weight

SPECIFICATION

Hot or Chilled Water, up to 50% Glycol

_2F (0° C)

200 F (93 C)

Equal % Service Port Linear Bypass (3-way only)

300 psi (20.7 bar)

12 VA (in rush), 100 mA Continuous

Forged Brass

Chrome-Plated Brass

Stainless Steel

High Temperature Thermoplastic

Stainless Steel Base, Aluminum Cover

125 F (52 C) 95% Non-Condensing

24 vac -- 15%, +t 0%

50/60 Hz

12 VA inrush at 24 vac

2.5 VA holding

Screw Terminals

3.0 Ib(1360 Q)

WATER

COIL

3-WAY VALVE

WATER

COIL A • RETURN

J[ SUPPLY

2-WAY VALVE

Fig. 33 -- Typical Piping for Spring Return

2-Way and 3-Way Mixing Valves

(6O)

,.d;

+..-÷_

o_ oF

")18 _1-:

(2e) (ss)

4-3/6

(111)

3-3/4_

1-I . (99)

(221

"-7

(98)

NOTE: Dimensions are ininches (mm).

Fig. 34 -- Water Valve Dimensions

(Modulating Type)

1-3/4 (34)

_'WAY

The valve type is identified by the first digit of the two-digit

control code number. In Table 18, the water valve type is

shown for each unit depending on coil capacity.

For pressure drops other than those tested, see Table 19. See

Tables 20 and 21 for close-off pressure.

Table 18 -- Factory-Supplied Water Valves

CONTROL SEQUENCE

2A/3A

2B/3B

2D/3D

2Fi3F

2G/3G

2J/3J

2K/3K

2M/3M

20/30

21/31

22/32

23/33

24/34

25/35

LEGEND

APPLICATION

Chilled/Hot Water (Modulating Valve) Control

Chilled Water Cooling, Hot Water

or Steam Heating

Chilled Water Cooling, Electric Heat

Hot Water or Steam Heatin9 Only

Hot Water or Steam Heating, DX Cooling

Chilled Water Cooling Only

Face and Bypass Chilled Water Cooling

with Valve Control Heating

Face and B pass Chilled Water Cooling

withValve _oPntrol Reheat

Chilled Water/Hot Water Using Face

and Bypass Damper Control

Chilled Water Cooling. Hot Water or

Steam Heating

Chilled Water Cooling. Electric Heat

Hot Water or Steam Heating. DX Cooling

Hot Water or Steam Heating Only

Chilled Water Cooling Only

VALVE APPLICATION

Chilled Water/

Hot Water

Chilled Water

Hot Water/Steam

Chilled Water

Hot Water/steam

Chilled Water

Reheat

Chilled Water

Reheat

Preheat

Chilled Water/

Hot Water

Chilled Water

Hot Water/Steam

Chilled Water

Hot Water/Steam

Chilled Water

NORMAL POSITION

Open

Closed

Open

Closed

Open

Closed

Open

Closed

Open

DX -- Direct Expansion

Table 19 -- Valve and Coil Pressure Drops vs Flow

UNIT

SIZE COIL VALVE

(NOMINAL ROWS SUPPLIED

CFM) (Cv)

1" 2,5

2* 2.5

500 3 2.5

42.5

5 2.5

1" 2.5

2* 2,5

750 3 2.5

4 2,5

52.5

1" 2.5

2* 2.5

1000 3 4.0

4 4.0

5 4.0

1" 2.5

2* 2,5

1250 3 4,0

4 4,0

5 4.0

1" 2.5

2* 2.5

1500 3 4.0

4 4.0

5 4,0

1" 2.5

2* 2,5

2000 3 4.8

4 4.0

5 4.0

LEGEND

Cv -- Coefficient of Volume

*Hot water only.

TYPICAL VALVE

AND COIL

PRESSURE DROP

psi gpm

3.1 4

3.3 4

3,3 4

3.3 4

3,1 4

3,5 4

3.3 4

3,3 4

3,6 4

3.5 4

4 6

3,6 4

3,5 4

6.7 8

6,7 8

3.6 4

3,8 4

10.8 10

3.6 4

3.8 4

10.8 10

desired gpm flow )2

NOTE: Desired Pressure Drop = (-

Table 20 -- 2-Way Water Valve Specifications

and Ratings

FLOW CLOSE-OFF

APPLICATION COEFFICIENT NORMAL

VOLUME PRESSURE

Cv PSi POSITION

1.3 35 OPEN

Steam 2.2 35 OPEN

4.4 35 OPEN

Rot/Chilled Water 2.5 50 OPEN

4.0 35 OPEN

Chilled Water 2.5 50 CLOSED

Only 4.0 35 CLOSED

LEGEND

Cv -- Coefficient of Volume

Table 21 -- 3-Way Water Valve

Specifications and Ratings

FLOW

APPPLICATION COEFFICIENT CLOSE-OFF NORMAL

VOLUME PRESSURE POSITION

Cv PSI (COIL)

Not/Chilled 2.5 50 OPEN

Water 4.0 35 OPEN

Chitled Water 2.5 50 CLOSED

Only 4.0 35 CLOSED

LEGEND

Cv -- Coefficient of Volume

2-WAY STEAM VALVES--All steam valves utilize an

electrically driven hydraulic actuator which provides a full

modulating capability and a return feature. Each steam valve is

factory_,,quipped with a spring linkage extension to prevent

any actuator damage due to high steam temperatures. Steam

valve specifications and dimensions are found in Table 22 and

Fig. 35.

Table 22 -- 2-Way Valve Specifications

Application

Fluid Temperature

Steam Pressure Limits

Flow Type

Material

Valve Connections

Maximum

Maximum inlet

Differential

Body

Stem

Seat

Plug

Pacldng

Disc

Maximum Ambient Temperature

Voltage

Actuator Power

Connections

Weight

Steam

281 F(138 C)

35 psi (241 kPa)

20 psi (138 kPa)

Equal%

Bronze

Stainless Steel

Bronze

Brass

Spring Loaded Teflon

Composition

Female, Union Sweat

s/s in. ID (1/2 in. Nominal Copper) Tube

140 F (60 C)

24 Vac -15%, +10% 50/60 Hz

22 VA at 24 vac

Wire Leads

6.0 Ib (3057 g)

NOTE: Avoid condensation which can facilitate corrosion. With 40 F (4 C) water, the maxi-

mum allowable ambient dew point temperature is 68 F (20 C). Piping insulation must not

stop drainage at actuator mounting nut. Do not use hydraulic actuators with fluid tempera-

tures below 40 F (4 C).

_3-1/4-_)

"9-25/32

FLOW

6-3/4

<11 IN 'A'

*Includes 21/32-in.(52 mm) for linkage extension.

NOTES:

1. Allow 3 in. clearance above actuator for removal. Mount actua-

tors above the valve body at 45-degrees from vertP.al. Refer to

Fi9. 32.

2. Dimensions are in inches.

Fig. 35 -- Valve Dimensions

SET-UP, CONFIGURATION, AND

OPERATION

The Unit Ventilator Comfort Control module (P/N 110500)

is designed to be installed using the CCN Network Service

Tool, or a CCN Building Management system such as Building

Supervisor, ComfortVIEW TM or ComfortWORKS® software.

The control provides several comprehensive screens for easy

set-up and configuration of the control. See Tables 23-29. Two

additional screens display the operation of the equipment.

Each unit is factory-configured for the control sequence or-

dered. Only set points, schedules, alarm limits, and user op-

tions need to be adjusted. Tables 23-29 depict the screens that

provide a fist of the information contained within each func-

tion, the expected range of values for each parameter, and the

allowable force limits or configuration range. For specific in-

formation about Network Service Tool, Building Supervisor,

ComfortVIEW, or ComfortWORKS software refer to the oper-

ating instructions for each specific piece of software.

The Service Configuration screens are used to specify the

equipment model and control sequence being used, such as the

type of heating or cooling used (chilled water, DX cooling,

steam, or hot water) and the damper control type (ASHRAE

Cycle I, II or III). These values am factouc-configured for the

control sequence as ordered. A separate configuration screen is

used to modify the factory pre-eonfigured alarm set points, if

required, in order to meet a specific customer requirement.

The service configuration screens are located under the

Diagnostic/Service Configuration function. See Table 24.

Alarm configurations am shown in Table 25.

The Modify controller screen allows the installer to select

from a list of standard control options which can be used for

specific applications. Standard control options include Space

Temperature Set Point adjusUnent with an adjustable maxi-

mum limit, the ability to provide dehumidification with or

without reheat, override duration, unoccupied free cooling, or

warm up temperature check, and other control features.

The control configuration screens are located under the

CCN Configuration function. See Table 27.

The Set Point screen is used to configure the desired control

set points for the specific application. These set points include

the occupied heating and coohng set points, the unoccupied

heating and cooling set points, the ventilation airflow set point,

the IAQ set point (optional) and the ASHRAE Cycle I]1 Damp-

er set point (for Cycle 111control). The Set Point screen is locat-

ed under the Modify/Set Points function. See Table 28.

The Points/Display screen is used to monitor equipment

operation and provides a simple overview including: the oper-

ating mode, heating and cooling capacity, ventilation airflow

value, equipment and sensor alarms, and a list of actual sensor

and output values. The Status Display screen is located under

the Points/_splay function. See Table 26.

The Maintenance screen provides an indication of the

control algorithm operation and a view of each individual con-

trol loop as it is currently functioning. The Maintenance

screens am located under the Diagnostic/Maintenance func-

tion. See Table 29. The Linkage Maintenance screens am locat-

ed under the Diagnostic/Maintenance function. See Table 29.

The Maintenance screen provides an indication of the informa-

tion the Unit Ventilator Comfort Control module has received

from the linkage thermostat (if supplied).

Act -- Actual

AQ -- AirQuality

ASCII -- AmericanStandardCode

for Information

Interchange

ASHRAE -- AmericanSocietyof

Heating,Refdgeration

andAirConditioning

Engineers

CCN -- CarrierComfortNetwork_

Gig 1 Configured

Cntrl -- Control

CV -- ConstantVolume

DI -- DiscreteInput

DX -- DirectExpansion

Ele -- Element

Hi Lira -- HighLimit

LEGEND (For Tables 23-29)

Hys -- Hystersis

Kd -- DerivativeConstant

Ki -- IntegralConstant

Kp -- ProportionalConstant

LoLim -- LowLimit

MAD -- Mixod-AirDamper

MAT -- MixedAirTemperature

Sensor

Med -- Medium

min -- minute

Norm -- Normal

Nr -- Number

OAT -- Outdoor-AirTemperature

Sensor

Oc/Occ -- Occupied

PID -- Proportional/Integral/

Derivative

Pos -- Position

RH -- Relative Humidity

Schd -- Schedule

SP/Setpt -- Setpoint

Stg -- Stage

Sup BIk #-- Supervisory Block

Number

Sup Bus -- Supervisory Bus

Number

Sup Ele -- Supervisory Element

Number

Temp/Tmp -- Temperature

Tim Gard 1Time Guard

Tmd Ovr -- Timed Override

Tmd Ovr Hrs -- Timed Override Hours

Unoc -- Unoccupied

Table 23 -- CCN Device Configuration

SOFTWARE

DEVICE NAME DESCRIPTION LOCATION PART NUMBER

Comfort

40UV/UH System Unit CESR-131191-02

Ventilator

NOTE: The device name, description, and location fields can be modified by the

BuildingSupervisor or ComfortWORKS_ software.

Table 24 -- Service Configuration

DESCRIPTION

2 Pipe Changeover

ASHRAE Cycle Fan Control

#Fan Speeds (1-3)

Unit SLze

% Air Flow Med

% Air Flow Low

Fan PID

Starting Value

CoolingType CV Cooling

Starting Value

Staged Cooling Nr of Stages

Stg 1 Tim Gard

Stg 2 Tim Gard

Stage 1 Logic Type

Sta e2L icType

_eating°_,pe

Heating

Starting Value

Fan Off Value

Staged Heating Nr of Stages

Stg 1 Tim Gard

Stg 2 Tim Gard

Stage 1 Lo ic Type

Damperg_ype

CV Mixed Air Damper

Starting Value

Air Quality

Max AQ Output

AQ Low Voltage

AQ High Voltage

AQ Low Reference (PPM)

AQ High Reference (PPM)

Filter Timer hrs * 100

Space Temp Trim

MAT Sensor Trim

OAT Sensor Trim

POINT NAME

UNITTYPE

CYCLE

FAN TYPE

UNI]'SIZE

AFMED

AFLOW

STARTVAL

COOL_TYP

STARTVAL

STAGES

TGf

TG2

CLT1

CLT2

HEAT TYp

STARTVAL

HCFOV

STAGES

TG1

TG2

HLT1

MiXD

STARTVAL

AQMDP

Volts

AQINHI

AQLO

AQHI

FIL TIMR

RATTRIM

MATTRIM

OATrRIM

STATUS IUNITS

Disable/Enable

xxxx CFM

XX.X

X.X

XX.X

xx.x %

XX.X

x,x

xx,x

XX.X °F

Disabie_nable

Disable/Enable

Norm]Inert

Norm/Invert

XX.X

X.X

XX.X

XX.X °F

:OLX °F

Disable/Enable

Norm/Invert

XX.X

X.X

XX.X

XX.X °F

XX.XX

xxx.x %

xx.x Volts

XXXX

_.X ^F

X3(.X ^F

xx.x ^F

RANGE

0-1"

1-3t

1 - 3t

100-5000

30-100

20-100

0.0 - 40.0

0.0 - 10.0

0.0 -20.0

0.0 -100.0

o- 3t

O.O- 40.0

0.0 -10.0

0.0 - 2O.O

40.0 - 903

1-2

0-1"

0-1

0-1"

0 - 3/

0.0 -40.0

O,0 -10,0

0.0 -20.0

40.0 -90,0

35.0 -70,0

1-2

0-1"

0-2

0.0 - 40.0

0.0- 10,0

0.0 - 20.0

40.0 -90.0

0- 1.0

0.0 - 100.0

0.0 -10.0

0.O -10.0

O.0-5000.0

0.0 - 5000.0

0 - 99

-5.0 -5.0

-5.0 - 5.0

DEFAULT

Disable

1000

10.0

3.0

O.0

0.0

8.0

0.3

0.O

65.0

Enable

Normal

8.0

0.3

80.0

55.0

Enable

Normal

8.0

0.3

0.0

60.0

0.1

0.03

85.0

2.0

10,0

0.0

2000.0

0.0

*O = Disable or Normal

1= Enable or Inverted 1"0 = None

1= Modulating

2= Two Position

3 -- If applicable, Direct Expansion (DX) for Cooling Type. Electric

Heating for Heating Type.

Table 25 -- Alarm Service Configuration

DESCRIPTION

Alarm Routin Control

Realarm _-ime

Cntrl Temp Hys

Supply Air Temperature

Lo Lim

Hi Lira

Mixed Air Temperature

Lo Lira

Hi Lira

Relative Humidity

LOLim

Hi Lim

Outdoor Air CFM

Lo Lim

Hi Lira

Air Quality

Lo Lim

Hi Lim

Outdoor Air Temperature

Lo Lim

Hi Lim

*0 = Disable

1 = Enable.

1-255 disables realarming.

POINT NAME

ALRMCNT

REALARM

SPTHYS

LOWLIM

HIGHLIM

LOWLIM

HIGHLIM

LOWLIM

HIGHLIM

LOWLIM

HIGHLIM

LOWLIM

HIGHUM

LOWLIM

HIGHLIM

STATUS /UNITS

xxxxxxxx

xxx

XX.X

XXX,X

XXX.X

XXXX.X

)O(XX.X

XXX.X

RANGE

0-1"

min 1-2551-

^F 1.0 -20.0

°F -40.0 - 245.0

°F -40.0 -245.0

°F -40.0 - 245.0

%RH 0.0 -100.0

CFM 0.0 -5000.0

CFM 5000 -5000

0.0 -5000.0

0.0 - 5000.0

°F -40.0 - 245.0

aF -40.0 - 245.0

DEFAULT

11010000

255

5.0

45.0

150.0

40.0

120.0

30.0

70.0

0.0

800.0

0.0

800.0

40.0

140.0

NOTE: Alarm retry time (in the event an alarm is not acknowledged)

is fixed at 5 minutes.

Table 26 -- Status Display

DESCRIPTION

Desired Mode

Equipment Status

Controllin Temperature

Space LIg-emperature

Supply Air Temperature

Mixed Air Temperature

Outdoor-Air Temperature

Fan Relay

Fan Status

Remote Start

Outdoor Air Enthalpy

Cooling Capacity

Heating Capacity

Outdoor Air cfm

MAD Capacity 0.0 - 100.0

Filter Status

Air Quality (PPM)

Relative Humidity

Fire Shutdown

Coil Freeze Detection

Changeover Switch Input

Spare Discrete Input

Spare Analog Input

Mixed Air Damper 1

Mixed Air Damper 2

Cooling 1

Cooling 2

Heating 1

Heating 2

Heating Enable Output

Cooling Enable Output

POINT NAME

MODE

ALARM

SPT

RAT

SAT

MAT

OATEMP

FANSTAT

REMOTE

ENT

CCAP

HCAP

OACFM

MIXDCAP

FLTSTAT

CFD

STATUS/UNWS

x:OOO_X

Norm/Alarm

X_OK.X

XXX.X

X)O(.X

XXX.X

Oft/On

XX)O(XX

Off/On

High/Low

)OC(.X

XXX.X

)C<XX.X

XXX.Z

Clean/Ditty

XXXX.X

XXX.X

Norm/Alarm

Fire shutdown

Norm/Alarm

CHANGOVR

DI0

AI0

MIXD1

MIXD2

CCV1

CCV2

HCV1

HCV2

HEATING

COOLING

Heat/Cool

Oft/On

XX,X

Off/On

Oft/On

*The text used for Mode shall be one of the following:

Off, Occ Cool, Occ Heat, Fan Only, UnocCool, UnocHeat, Warm-Up, Free Cool.

TThe text used for Fan Status shall be one of the following:

Off, Low, Medium, High.

**0 = Off, High, or Clean 1 = On, Low, or Dirty.

NOTE: The presence of override limits indicates that the point is forcible, all others are read

only,

ASCII*

°F

ASCII1-

CFM

%RH

Vo}ts

OVERRIDE

LIMITS

-40.0 - 245.0

-40.0 -245,0

-40,0 - 245.0

0- 1"*

0-1-*

0-1"*

0.0 - 5000.0

0.0 - 100.0

0 - 1"*

0.0 - 5000.0

0.0 -100.0

0-1"*

0.0 - 10.0

0-1"*

0-1 _

0- 1"*

0-1 -

0-1 _

0-1"*

Table 27 -- CCN Configuration

DESCRIPTION

Warm-Up Temp Check

Unoccupied Fan Cycling

Unoccupied Free Cooling

Free CooliniqLock-out

DX Outdoor Air Lock-out

Max Offset Adjustment

Air Qua]ity Control

High Humidity Limit

Local RH Sensor

Reheat

Occ Schd

Tmd Ovr Hrs

Linkage Thermostat

Cool Strt Bias (mirddeg)

Heat Strt Bias (min/de_)

POINT

WARMENAB

FAN_CYCL

NTEN

NTLO

DXLO

LIMT

AQEN

HIHUM

RHSENS

REHEAT

OCCSCHED

TIMOVRID

KCOOL

KHEAT

STATUS IUNITS

Disable/Enable

xx.x °F

xxx.x °F

xx.x ^F

Disable/Enable

xxx.x %RH

No/Yes

Disable/Enable

x hours

*0 = Disable or No 1 =Enable or Yes

"j-Valuebelow 65 (i.e., rain value/default) disables global occupancy from CCN.

min

RANGE

0-1"

35 - 80

-40 - 65

0 - 20

0-1"

0 - 100

0-1"

64 - 99t

0-4

O- 60

DEFAULT

Enable

Disable

Enable

50.0

60.0

0.0

Disable

100.0

Disable

Table 28 -- Set Point Configuration

DESCRIPTION

Setpoint

Oc Heat SP

Oc Cool SP

Unoc Heat SP

Unoc Cool SP

Cycle lit Damper Setpt

Economizer Lock-Out Temp

Ventilation Setpoint

AQ Setpoiut (PPM)

POINT STATUS /UNITS

OHSP

OCSP

UHSP

UCSP

C3DSP

ELOSP

OASP

AQSP

XX.X

)C(.X

XX.X

XXXX.X

RANGE

°F 40 - 90

°F 45 - 99

°F 40 - 90

°F 45 - 99

°F 40 - 90

CFM 100 - 5OO0

0 - 5000

DEFAULT

70.0

75.0

55.0

90.0

55.0

63.0

200.0

650.0

Table 29 -- Maintenance

DESCRIPTION

Occupied

Linkage in Effect

Tmd Ovr in Effect

Heat Master Reference

Heat Submaster Reference

Cool Master Reference

Cool Submaster Reference

MAD Master Reference

MAD Submaster Reference

Cfg MAD Min Position

Act MAD Min Position

Temperature Reset Value

Cooling in Effect

Heating in Effect

Reheat in Effect

AQ Control in Effect

AQ Calc Damper Pos

Fan Status DI

Fan Speed Relay 1

Fan Speed Relay 2

Linkage Thermostat Linkage Status

Sup Ele

Sup Bus

Sup BIk #

Avg Oc Heat SP

Avg Oc Cool SP

Avg Unoc Heat SP

Avg Unoc Cool SP

AvgZone Tmp

Avg Oc Zone Trap

Oc Stat

POINT

OCCSTAT

DAVCL

TIMOV*

HCMR

HCSR

CCMR

CCSR

MIXDMR

MIXDSR

MIXDMDP

DMPRMIN

RESET

COOLFLAG*

HEATFLAG*

REHTFLAG*

AQFLAG

MDPAQ*

FANDI

FANSPD1

FANSPD2

LINKSTAT*

SUPE-ADR*

SUPE-BUS*

BLOCKNUM*

OCLOSTPT*

OCHISTPT*

UNLOSTPT*

UNHISTPT*

AZT*

AOZT*

OCCSTAT*

STATUS /UNITS

No/Yes

NeiYes

No/Yes

xxx.x °F

XXX.X °F

xxx.x °F

XXX.X °F

Jc(x.x %

_<x.x %

xx.x ^F

No/Yes

NeiYes

No/Yes

)o(x.x %

Off/On

OfflOn

Off/On

xxx

_O(.X _F

XX.X °F

xx.x °F

t0=off 1=On

NOTE: The presence of override limits indicates that the parameter is forcible;

all others are read only except those marked (*) which cannot be forced or read from CCN.

OVERRIDE LIMITS

35.0 to 140.0

40.0 to 150.0

48,0 to 120.0

0.0 to 100.0

0-1t

START-UP

Start-up procedures vary depending on time of year (sum-

mer or winter) and building characteristics (new building/old

building, occupiedhmoccupied, etc.).

Start-up in the cooling mode requires proper care to avoid

condensation problems. Condensation forms on surfaces that

are colder than the dew point of the surrounding air. If a unit is

started and is piped with low-temperature chilled water in a

hot, humid atmosphere, condensation will form on many parts

of the unit. In order to avoid excessive condensation, higher

temperature water should initially be used (approximately 65 to

70 F). Also, the building should be as completely closed as

possible. Close the unit's outside-air dampers. Bathroom and

kitchen exhaust fans should be off.

As the building temperature drops, the chilled water temper-

ature can be gradually reduced until it reaches 50 E At this

point the outside-air damper can be opened to take in minimum

outside air. When the chilled water temperature is reduced to its

design point, the exhaust fans can be turned on.

SERVICE

Lock out and tag all power supplies to equipment and con-

trois prior to servicing unit. Follow all safety codes. Failure

to do so could result in personal injury.

Preventing Excessive Condensation on Unit --

Excessive condensationcan be causedby running chilled water

through a unit with the unit fan off. If fan cycling is used, a water

flow control valve should be installed to shut off the water when

the fan stops.

Other methods of control which avoid condensation prob-

lems are as follows:

1. If condensation is forming on the unit, verify the chilled

water valve is closing off tightly. Dirt or debris may pre-

vent the valve from closing completely.

2. Continuous fan operation with motorized chilled water

valve controlled by a thermostat.

3. Continuous fan operation with thermostat control to

switch fan from high to low speed (instead of off).

Check Drain -- Check drain pan, drain line, and trap at

start of each cooling season. Astandard type pipe cleaner for

3/4-in. ID pipe can be used to be sure pipe is clear of obstsuction

so that condensate is carried away. Check the drain line at filter

cleaning time during the cooling season. Be sure that debris has

not fallen into unit through supply air grille.

Fan Motor Bearings -- Standard motors are perma-

nent split capacitor, which are equipped with permanently

sealed and lubricated bearings. No lubrication is required

unless special motors have been supplied or unusual operating

conditions exist.

Fan Shaft Ball Bearing -- These mid and inboard

beatings are permanently sealed and lubricated. No additional

maintenance is required. The end bearings must be lubricated at

the start of each cooling and heating season. Add 5 to 10 drops

of SAE 20 or 30 non-detergent based oil to the bearing.

Clean Fan Wheel -- For access to fan assembly, remove

discharge grille (if supplied). If unit is connected to ductwork,

remove front (40UV) or bottom (40UH) panel, separate fan

shaft from motor at bushing, remove motor, and slide fan

assembly from track. Use a stiff brush or vacuum to remove

dirt and debris from scroll. Wipe all fan surfaces with a damp

cloth. Reassemble as necessary.

Clean or Replace Air Filters -- At the start of each

cooling season and after each month of operation (more or less

depending on operating conditions), replace throwaway filter

or clean permanent filter.

THROWAWAY FILTER -- Replace filter with a good quality

filter of the correct size. Do not attempt to clean and reuse

disposable filters. See Table 1 for filter sizes.

PERMANENT FILTER (Fiber Type)

1. Tap on solid surface to dislodge heavy particles.

2. Wash in hot water. If needed, use mild solution of com-

mercial solvent such as sal soda or trisodium phosphate.

3. Set filter on end so that water drains out through slots in

frame. Allow filter to dry thoroughly.

4. Recharge filter with recharging oil. Three ounces is suffi-

cient for a medium size filter. Oil may be applied by

insect spray gun. For easier spraying, the oil can be

warmed.

If the filter is dipped in the recharging oil, remove it

immediately and allow to drain through slots in frame.

5. Replace filter in unit.

If another type of filler is used, follow the filter maunfactur-

er's instructions.

ECM Motor Removal and Reinstallation

(Fig. 36) -- Cartier unit ventilators utilize an Electronically

Commutated Motor (ECM) to drive the indoor fan.

The ECM is a factory programmed motor that is standard

with factory-supplied controls (CCN) and units without

factory-supplied controls that are used in high-static applica-

tions or high-capacity coils.

The ECM is programmed with an algorithm that maintains

a constant torque as the static pressure on the system varies.

For example, as the filter pressure drop increases due to dirt,

the fan will increase speed (rpm) to maintain the cfm.

The ECM is identified by the two electsical receptacles

located on the housing. See Fig. 8A, 8B, and 36.

The first receptacle is a 5-rew in-line connector that feeds

the motor line voltage. This may be either 115 volts or

230 volts. Units that are wired for 230 volts have a jumper be-

tween terminals 1 and 2 on this plug (see wiring diagram).

The second receptacle on the motor is a 16-pin connector

and is used for speed switching. This is a low voltage (24-volt)

connection. There is a jumper wire between terminals 1 and 3.

This is a 24-volt ground. Voltage is present at all times when

the motor is energized.

NOTE: A time delay exists between the time the motor speed

is switched and the motor's reaction. This is designed into the

eleclronics and does nut indicate motor problems.

When replacing the motor, note the following:

Check the part number of the old motor against that of

the replacement. There is a tag indicating the eight-digit

part number and begins with LIVE. This is the program

number used for this motor.

• The motor must be installed per the instructions below.

It is important to maintain the dimension between the

fan compartment bulkhead and the coupling.

IMPORTANT: If a replacement cooling shroud has been

supplied, it should be installed and the old one

diseasded. The motor shroud directscooling air across

the motor m provide proper cooling. Never run the

motor without the cooling shroud in place. Ensure

the shroud inlet ring does not touch the motor; agap of

1116in. to Vsin. is acceptable.

SHAFT

1.000 -+Q.063

[]

AND COOLING

SHROUD

ELECTRICAL

CONNECTIONS

FACINGUNIT

O FRONT.

SHROUD

OPENINGOVER

MOTORELECTRICAL

O CONNECTIONS.

MOTOR(ECM)

NOTES:

1. All dimensions shown in inches.

2. Not all components shownfor clarity.

3. Motor shroud not shown for clarity. Install prior

to operation,

4. Refer to Fig. 42 for cooling shroud installation.

Fig. 36 -- 40UV,UH Ventilator Blower Section Assembly -- ECM Motor Detail

Ensure the unit is completely assembled when chocking the

fan speed. Replace all panels, including the filters, before

checking the fan for operation. When the internal pressure

drops at a normal condition, the loading on the motor will

be such that the fan can come up to selected speed.

Fa'dure to ensure unit is completely assembled may

result in reduced life of unit and/or personal injury.

To remove and re-instaU the motors, proceed as follows;

refer to Fig. 36:

1. Remove the wire plugs from the motor.

2. Remove the 2 screws holding the motor shroud to the

bulkhead.

3. Slide the shroud offthe motor to the right.

4. Loosen the 3 setscrews on the shaft coupling between the

motor shaft and the fan shaft.

5. Loosen the motor 'belly band' and slide motor out of the

'belly band' to the right. It is unnecessary to remove the

motor mounting bracket from the bulkhead. Loosen only

the "belly band' securing the motor in the mount.

6. Rdmstall the motor in the 'belly band."

7. Ensure the blower wheels are centered within the fan

housings (between the inlet rings) before ,securing the

motor shaft couphng.

The motor eloctronics will fail prematurely if no air is able

to circulate over the motor.

8. Ensure the motor housing is at least 1 in. from the

bulkhead so that air will be able to circulate over the

motor.

9. For vertical type units, position the motor so that the

motor wire plugs are front fa(mg on a horizontal plane.

For horizontal type units with ceding mounts, position the

motor so that the motor wire plugs are front facing on a

vertical plane.

10. Secure the 3 setscrews on the shaft coupling when the

motor is properly positioned and the blower wheels are

centered within their housing.

11. Re-socurethe motor 'belly band' around the motor.

12. Reinstall the motor shroud. It is important that the motor

shroud be installed prior to operation of the motor. Ensure

the venturi is installed on the motor shroud.

13. Re-secure the two screws holding the motor shroud to the

bulkhead.

14. Reinstan the motor wire plugs.

Blower Assembly Section Removal and Rein-

stallation (Fig. 37)

Lock out and tag all power supplies to equipment and con-

trois prior to servicing unit. Follow all safety codes. Failure

to do so could result in personal injury.

Be careful with all components during installation, espe-

cially the bearing and plastic blower wheels. Any extreme

force applied to these components can cause unintended

damage and could void the unit warranty.

To remove blower assembly:

1. Turn off power to the unit.

IMPORTANT: Tag each right front panel (40UV) or

middle bottom panel (40UH) for each unit. Panels have

electrical information specific to each unit.

2. Remove all front (40UV) or bottom (40UH) panels. Re-

move end panels.

3. Remove top panel with 5/]6 in. nut driver and set optional

vanes and screens to the side (40UV). Remove ductwork

if rexluired and remove top (40UV) or front (40UtD dis-

charge plenum.

4. Remove 1/4in. head screws along length of unit that se-

cure coil baffle to blower section. See Item 5 in Fig. 37.

5. Remove four ]/4 in. head screws that connect the blower

section sides to the coil section sides. See Item 2 in

Fig. 37.

6. Remove the ]/4 in. head screw from the center of the

blower dock that attaches the blower deck to the pipe

chase. See Item 1 in Fig. 37.

7. Remove six 1/4 in. head screws attaching coil baffle to

coil section. See Item 4 in Fig. 37.

8. Remove the harness connector(s) from the motor.

9. Remove the V4 in. head screw from the green ground

wire that connects the motor to frame if unit has a PSC

motor. ECM motors are grounded through the harness.

10. Remove the two cardage bolts retaining the front brace to

the frame sides. See Item 6 in Fig. 37.

11. Remove the four nuts retaining the blower section to the

back (40UV) or top (40UH) frame. See Item 3 in Fig. 37.

12. Remove the two 5/16in. nuts retaining the inboard bearing

bracket to the pipe chase (40UV, UHI50 units only). See

Item 6 in Fig. 38.

13. Remove blower section from ftame.

Toreinstallblowerassemblytoframeofunit:

1. Reinstallblowersectionintoframeassembly.

2. Tightenthefour5/L6in.nutsretainingblowersectionto

frame.SeeItem3inFig.37.

3. Tightenthetwo5/16in.nutsretainingtheinboardbeating

brackettothepipechase(40UV,UH150unitsonly).See

Item6inFig.38.

4. Reinstalltwocarriageboltsthatattachthefrontbraceto

theframesides.SeeItem6inFig.37.

5. Rotatethefanshaftbyhand to ensure that fans are

unrestricted and can rotate freely. Check for any fan

obstructions.

6. Re-attach green ground wire that connects the motor to

the frame with 1Ain. head screw if unit has a PSC motor.

ECM motors are grounded through the harness.

7. Cormect harness conneetor(s) to motor.

8. Reinstall the coil baffle using six V4 in. head screws that

attach the coil baffle to the coil section. See Item 4 in

Fig. 37.

9. Reinstall the 1/4in. head screw at center of blower deck

attaching blower deck to pipe chase. See Item 1 in

Fig. 37.

10. Reinstall the four 1/4 in. head screws holding the blower

section sides to the coil section sides. See Item 2 in

Fig. 37.

11. Reinstall 1/4 in. head screws along length of the unit,

securing coil baffle to the blower section. See Item 5 in

Fig. 37.

12. Reinstall optional vanes and screens and install top panel

(40UV). Reinstall top (40UV) or front (40UH) discharge

plenum and ductwork, if required.

13. Reinstall front (40UV) or bottom (40UH) panels. Rein-

stall end panels. Ensure that tag on each right front

panel (40UV) or middle bottom panel (4llUH) match-

us unit tag.

14. Restore power to unit.

IMPORTANT: Disassembly order is not as important as

reassembly. The assembly order of the bearing bracket

installation is critical to having a well balanced and

sound blower deck.

Coil Assembly Removal and Reinstallation

(Fig. 39)

Lock out and tag all power supplies to equipment and con-

trois prior to servicing unit. Follow all safety codes. Failure

to do so could result in personal injury.

Turn off all power supplies to equipment and controls. Fail-

ure to do so may cause personal injury or damage to the

uniL

To remove coil assembly:

1. Turn off power to the unit.

IMPORTANT: Tag each tight front panel (40UV) or

middle bottom panel (40UH) for each unit. Panels have

electrical information specific to each unit.

2. Remove all front (40UV) or bottom (40UH) panels. Re-

move end panels.

3. Remove 1/4 in. head screws along length of unit that se-

cure coil baffle to blower section. See Item 2 in Fig. 39.

4. Remove four I/4 in. head screws that connect the blower

section sides to the coil section sides. See Item 1 in

Fig. 39.

5. Remove 114in. head screws attaching outside air (OA) ac-

tuator to damper shaft OR locking quadrant assembly to

damper shaft. Remove OA actuator or locking quadrant

assembly.

6. Tag low-limit thermostat wiring and terminals. Dis-

connect low-limit thermostat wiring (right end

compartment).

7. Drain water and/or recover refrigerant in accordance

with all applicable codes. Disconnect piping from coil

connections.

8. Tag optional electric heat element wire terminations for

later reconnection. Disconnect element wires from elec-

tric heat control box (remove coil baffle for access).

9. Remove the foor 5/16in. nuts retaining the coil section to

the flame.

10. Remove coil section from frame.

To reinstall coil assembly:

1. Replace coil section into frames assembly.

2. Tighten the four sh6 in. nuts retaining coil section to

frame.

3. Reconnect electric heat wiring in electric heat control

box.

4. Reconnect wiring to low limit thermostat.

5. Replace the four 1/4 in. head screws holding the blower

deck to coil section (two on each side).

6. Replace coil baffle using l& in. head screws. See Item 2

in Fig. 39.

7. Reinstall outside air actuator or locking quadrant handle

using V4 in. head screws.

8. Reconnect piping to coils. If water coil, purge air from

coils and perform hydrostatic test to check for leaks. If

DX coil, perform leak test using nilrogen, and evacuate

sod charge per recommended HVAC procedures and all

applicable codes.

9. Replace cod section side insulation.

10. Replace front (40UV) or bottom (40UH) panels. Replaee

end panels. Ensure that tag on each right front pond

(40UV) or middle botaom panel (40UH) matches unit

tag.

II. Restore power to unit.

RETURN AIR

TEMPERATURE

SENSOR(OPTIONA_

OPENING--

COIL BAFFLE_

CLIPS (SEE NOTE 3)

TEMPERATURE

SENSOR(OPTIONAL)

OPENING

DAMPER SECTION

SETCREWACCESS

ELECTRICAL

BOX

CHASE

NOTES:

1, Unit shown in vertical orientation. Drawing appfies

to horizontal and vertical units.

2. Not all components shownfor clarity.

3. 40UV, UH125-200 units only.

COIL SECTION

BLOWER SECTION

Fig. 37 -- 40UV,UH Ventilator Blower Section

SEE NOTE 4

SEE DETAIL A_I

• _ z:_ _ _

SEE DETAIL A BoTroM VIEW

NOTES:

1. Not all components shown for clarity.

2. This drawing applies to 1500 cfm units only.

3. Remove shaft, motor, and coupling prior to

bearing removal.

4. Refer to Fig. 36 and 43 for motor-coupling and

coupling-shaft tolerances.

DETAIL A

Fig. 38 -- 40UV,UH Ventilator Inboard Bearing (40UV,UH150 Only)

RETURN AIR

TEMPERATURE

SENSOR OPENING

FRONT

COIL

BAFFLE

SETSCREW ACCESS

ELECTRICAL

BOX

FILTER DOOR

RETAIN ER CLIPS

(SEE NOTE 3)

NOTES:

1. Unit shown in vertical orientation. Drawing

applies to horizontal and vertical units.

2. Not all components shown for clarity.

3. 40UV, UH125-150, 40UH200 units only.

COIL SECTION

Fig. 39 -- 40UV,UH Ventilator Coil Section

DAMPER SECTION

Ball Bearing Replacement (40UV, UH150;

40UH200 Units Only) -- Refer to Fig. 40 for 40UH200

units only, Fig. 41 for 40UV150 and 40UH150 units with PSC

motors, Fig. 42 for 40UV150 and 40UHI50 units with ECM

motors.

Lock out and tag all power supplies to equipment and con-

_a-olsprior to servicing unit. Follow all safety codes. Failure

to do so could result in personal injury.

The assembly order nfthe bearing installation is critical. Be

careful with all components during removal and installa-

tion. Any excessive force applied to these components can

cause unintended damage and void unit warranty.

To replace ball bearing:

1. Turn offall power to unit.

IMPORTANT: Tag each right front panel (40UV) or

middle bottom panel (40UH) for each unit. Panels have

electrical information specific to each unit.

2. Remove front (40UV) or bottom (40UH) panels and right

(motor end) end panel.

3. Remove top panel and set optional vanes and screens to

the side (40UV). Remove ductwork if required and re-

move top (40UV) or front (40UH) discharge plenum. For

non-ducted 40UH horizontal units with front double de-

flection discharge grille, remove grille for access to wheel

setscrews. See Fig. 37.

4. Remove IA in. head screws along length of unit that se-

cure coil baffle to blower section and remove front coil

baffle. See Item 5 in Fig. 37.

5. Loosen setscrews on all blower wheels (two per wheel).

See Fig. 38 and Fig. 40.

6. Loosen bearing setscrews.

7. Remove wiring harness connector(s) from motor.

8. If unit has ECM motor, remove motor shroud (sheet met-

al cover -- Fig. 40, Item 6; Fig. 42, Item 4) by removing

two 5h6 in. hex nuts. Do not discard cooling shroud.

9. Loosen 5/16 in. motor mount (Fig. 40, Item 7; Fig. 41,

Item 2; Fig. 42, Item 2), nut (Fig. 40, Item 3; Fig. 41,

Item 5; Fig. 42, Item 6), and bolt (Fig. 40, Item 4; Fig. 41,

Item 4; Fig. 42, Item 5), until motor housing (Fig. 40,

Item 5; Fig. 41, Item 3; Fig. 42, Item 3) moves freely.

10. Slide shaft-coupling-motor assembly (Fig. 38, ltems 3, 2,

1; Fig. 40, Items 5, 2, Ill) out of wheels and unit until

shaft clears inboard/center bearing assembly (30 in. max

clearance required from edge of frame end).

11. Remove V2in. bolts (Fig. 38, Item 4; Fig. 40, Item 9) and

hex nuts (Fig. 38, Item 7; Fig. 40, Item 1) securing bear-

ing to beating bracket. Remove beating (Fig. 38, Item 5;

Fig. 40, Item 8).

12. Install new bearing (Fig. 38, Item 5; Fig. 40, Item 8).

Secure with I/2in. bolts (Fig. 38, Item 4; Fig. 40, Item 9)

and hex nuts (Fig. 38, Item 7; Fig. 40, Item 1).

13. Slide shaft-coupling-motor assembly (Fig. 38, Items 3, 2,

1; Fig. 40, Items 5, 2, 10) back into beating and wheels.

Do not use excessive force. Damage to wheels may

OCCUr.

14.

15.

16.

17.

18.

19.

20.

21.

22.

23.

24.

25.

26.

Insert shaft-coupling-motor assembly into wheels until

motor clearance is as specified for motor type (PSC or

ECM). See Fig. 43 or Fig. 36.

Ensure that motor shaft is perpendicular to motor blower

endplate. Tighten sh6 in. motor mount (Fig. 40, Item 7;

Fig. 41, Item 2; Fig. 42, Item 2), nut (Fig. 40, Item 3;

Fig. 41, Item 5; Fig. 42, Item 6), and bolt (Fig. 40, Item 4;

Fig. 41, Item 4; Fig. 42, Item 5), until motor (Fig. 40,

Item 5; Fig. 41, Item 3; Fig. 42, Item 3) is secure.

Install motor shroud (sheet metal cover -- Fig. 40,

Item 6; Fig. 42, Item 4) using two 5/16in. hex nuts if using

ECM motor. Align "window" with receptacles on motor.

Motor control module could overheat and fail if oper-

ated without cooling shroud.

Re-attach green ground wire that connects the motor to

the frame with 1/4in. head screw if unit has a PSC motor.

ECM motors are grounded through the harness.

Re-attach wiring harness connector(s) to motor.

Center each wheel in its respective housing and tighten

wheel setscrews (two for each wheel).

Rotate the fan shaft by hand to ensure that fans are

unrestricted and can rotate freely. Check for any fan

obstructions.

Remove lockout and operate unit for approximately

60 seconds to let inboard/center bearing motmt

self-adjust.

Lock out and tag all power supplies to equipment and

controls. Tighten the two bearing setscrews.

Reinstall the coil baffle using the six V4 in. head screws

that attach the coil baffle to the coil section. See Item 5 in

Fig. 37.

Reinstall 1/4in. head screws along length of unit securing

coil baffle to the blower section. See Item 5 in Fig. 37.

Reinstall optional vanes and screens and install top panel

(40UV). Reinstall top (40UV) or front (40UH) discharge

plenum and ductwork if required or discharge grille.

Reinstall front (40UV) or bottom (40UH) panels. Rein-

stall end panels. Ensure that tag on each right front

panel (40UV) or middle bottom panel (40UH) match-

es trait tag.

27. Restore power to uniL

(SEEN_TE 5)"

(SEE NOTE 5) _/

(SEE NOTE 4)

NOTES:

1. Not all components shownfor clarity.

2. This drawing applies to 2000 cfm units only.

3. Remove shaft, motor and coupling prior to removing bearing.

Refer to Ball Bearing Replacement instructions.

4. Install sleeve bearing w_thoil cup facing up and towards the rear of

the assembly.

5. Refer to Fig. 36 for motor-coupling and shaft-couplingtolerances.

LEFT SIDE

VIEW

Fig. 40 -- 40UH200 Ventilator Blower Drive Train Assembly

UNIT

BOTTOM

(SEE NOTE 3)

(SEE NOTE 4)

NOTES:

1. Not all components shown for clarity.

2. Items no. 7, 16 and associated hardware not required for

40UV, UH150. Refer to Fig. 38 for 40UV.UHtS0 in-hoard bearing

replacement.

3. Install motor with capacitor facing up.

4. Install sleeve bearing with oil cup facing up and towards the rear of

the assembly. V

UNIT FRONT (40UV)

UNIT BOI_OM (40UH)

Fig. 41 --40UV,UH Ventilator Blower Drive Train Assembly --

40UV050-150 and 40UH075-150 Units (PSC Motor)

S_;E NOTE 2_ _

NOTES:

1. Not all components shown for ctarity.

2. Items no. 7, 10 and associated hardware not required for

40UV, UHt50. Refer to Fig. 38 for 40UV,UH150 in-board bearing

replacement.

3. Install motor with electrical connectionsfacing front of assembly.

4. Lnsta_loBcup facing up and towards the rear of the assembly. LEFT SIDE

Fig. 42 -- 40UV,UH Ventilator Blower Drive Train Assembly --

40UV050-150 and 40UH075-150 Units (ECM Motor)

UNIT FRONT (40UV)

UNIT BOI_OM (40UH)

[_]0 o

- O[3

I I

BLOWER SECTION

FRONT VIEW

COUPLING

O o

°/

.125±(]_32

0,500+0.063

FACE OF MOTOR

FLUSH WITH FACE

OF INSULATION

NOTES:

1. All dimensions shown in inches.

2. Not all components shownfor clarity.

Fig. 43 -- 40UV,UH Ventilator Blower Section Assembly -- PSC Motor Detail

Blower Wheel Removal and Reinstallation

(Fig. 44)- Refer to Fig. 40 for 40UH200 units only,

Fig. 41 for 40UV050-150 and 40UH075-125 units with PSC

motors, Fig. 42 for 40UV050-125 and 40UH075-150 units

with ECM motors.

Lock out and tag all power supplies to equipment and con-

trois prior to servicing unit. Follow all safety codes. Failure

to do so could result in personal injury.

The assembly order of the bearing installation is critical. Be

careful with all components during removal and installa-

tion. Any excessive force applied to these components can

cause unintended damage and void unit warranty.

To remove blower wheel:

1. Turn off all power to the unit.

2. Remove blower section per service instructions in Blower

Assembly Removal and Reinstallation.

IMPORTANT: Tag each fight front panel (40UV) or

middle bottom panel (40UH) for each unit. Panels have

electrieal information specific to each unit.

3. Use s/32 in. hex tool to loosen setscrews on all blower

wheels (two per wheel).

4. Loosen inboard/center bearing setscrews (only on

40UV, UH 150 and 200 size units).

5. If unit has ECM motor, remove motor shroud (sheet

metal cover -- Fig. 40, Item 6; Fig. 42, Item 4) by remov-

ing two 5/16in. hex nuts. Do not discard cooling shroud.

6. Loosen 5/16 in. motor mount (Fig. 40, Item 7; Fig. 41,

Item 2; Fig. 42, Item 2), nut (Fig. 40, Item 3; Fig. 41,

Item 5; Fig. 42, Item 6), and bolt (Fig. 40, Item 4; Fig. 41,

Item 4; Fig. 42, Item 5), until motor housing (Fig. 40,

Item 5; Fig. 41, Item 3; Fig. 42, Item 3) moves freely.

7. Slide shaft-coopling-motur assembly (Fig. 38, Items 3, 2,

1; Fig. 40, Items 5, 2, 10) out of wheels and unit until

shaft clears inboard/center bearing assembly (30 in. max-

imum clearance required from edge of frame end).

8. Remove four 1/4in. head screw (Fig. 44, Item 6) securing

blower housing(s) (Fig. 44, Item 7) to blower deck

(Fig. 44, Item 3) and remove blower and wheel assembly.

9. Remove five V4in. head screws (Fig. 44, Item 5) securing

blower inlet ring (Fig. 44, Item 4) to blower housing and

remove inlet ring.

10. Remove blower wheel(s) (Fig. 44, ltem 8).

To reinstall blower wheel:

1. Install new blower wheel(s) (Fig. 44, Item 8). Ensure that

the fan blades are installed in the correct orientation (cup

of blade towards discharge).

2. Install inlet ring (Fig. 44, Item 4) and install five _Ain.

head screws (Fig. 44, Item 5) securing blower inlet ring to

blower housing (Fig. 44, Item 7).

3. Install four q4 in. head screws (Fig. 44, Item 6) securing

blower housing(s) (Fig. 44, Item 7) to blower deck

(Fig. 44, Item 3).

10.

11.

12.

13.

14.

15.

16.

17.

18.

19.

20.

21.

22.

23.

Slide shafx-coupling-motor assembly (Fig. 38, Items 3, 2,

1; Fig. 40, Items 5, 2, 10) back into bearing and wheels.

Do not use excessive force. Damage to wheels may

Occur.

Insert shaft-coopling-motor assembly into wheels until

motor clearance is as specified fur motor type (PSC or

ECM). See Fig. 43 or Fig. 36.

Ensure that motor shaft is perpendicular to motor blower

endplate. Tighten s/]6 in. motor mount (Fig. 40, Item 7;

Fig. 41, Item 2; Fig. 42, Item 2), nut (Fig. 40, Item 3;

Fig. 41, Item 5; Fig. 42, Item 6), and bolt (Fig. 40, Item 4;

Fig. 41, Item 4; Fig. 42, Item 5), until motor (Fig. 40,

Item 5; Fig. 41, Item 3; Fig. 42, Item 3) is secure.

Install motor shroud (sheet metal cover -- Fig. 40,

Item 6; Fig. 41; Fig. 42, Item 4) using two S/is in. hex nuts

if using ECM motor. Align "window" with receptacles on

motor. Motor control module could overheat and fail if

operated without cooling shroud.

Reinstall blower section into frame assembly. See Fig. 37.

Tighten the four 5/16in. nuts retaining blower section to

frame.

Tighten the two 5/16in. (Fig. 38, Item 6) nuts retaining the

inboard bearing bracket to the pipe chase (only on

40UV, UH150 and 200 size units).

Reinstall two carriage bolts (Fig. 37, Item 6) that attach

the front brace to the frame sides.

Re-attach green ground wire that connects the motor to

the frame with I/4 in. head screw if unit has a PSC motor.

ECM motors are grounded ll_-oogh die harness.

Re-attach wiring harness connector(s) to motor.

Center each wheel in its respective housing and tighten

wheel setscrews (two for each wheel).

Reinstall one 1/4in. head screw (Fig. 37, Item 1) at center

of blower deck attaching blower deck to pipe chase.

Reinstall the four 1/4 in. head screws (Fig. 37, Item 2)

holding the blower section sides to the coil section sides.

Rotate the fan sbaf_ by hand to ensure that fans are

unrestricted and can rotate freely. Check for any fan

obstructions.

Remove lockout and operate unit for approximately

60 seconds to let inboard/eentea- bearing mount serf-adjust

(only on 40UV, UH150 and 200 size units).

Lock out and tag all power supplies to equipment and

controls. Tighten the two bearing setscrews (only on

40UV, UH150 and 200 size units). See Fig. 38, 40 or 44.

Reinstall the coil baffle using the six 114in. head screws

that attach the coil baffle to the coil section. See Item 4 in

Fig. 37.

Reinstall l& in. head screws along length of tmit securing

coil baffle to the blower section. See Item 5 in Fig. 37.

Reinstall optional vanes and screens and install top panel

(40UV). Reinstall top (40UV) or front (40UH) discharge

plenum and ductwork if required or discharge grille.

Reinstall front (40UV) or bottom (40Lrl_ panels. Rein-

stall end panels. Ensure that tag on each right front

panel (40UV) or middle bottom panel (40UH) match-

es unit tag.

24. Restore power to unit.

Sleeve Bearing Replacement (40UV050-125,

40UH075-125 and 4OUH200 Units Only)

(Fig. 44)- Refer to Fig. 40 for 40UH200 units only,

Fig. 41 for 40UV050-150 and 40UH075-125 units with PSC

motors, Fig. 42 for 40UV050-125 and 40UH075-150 units

with ECM motors.

Lock out and tag all power supplies to equipment and con-

trois prior to servicing unit. Follow all safety codes. Failure

to do so could result in personal injury.

The assembly order of the bearing installation is critical. Be

careful with all components during removal and installa-

tion. Any excessive force applied to these components can

cause unintended damage and void unit warranty.

To replace ball bearing:

1. Turn off all power to unit.

IMPORTANT: Tag each right front panel (40UV) or

middle bottom panel (40UH) for each unit. Panels have

electrical information specific to each unit.

2. Use 5/s2in. hex (Allen) tool or 318in. nut driver to remove

front (40UV) or bottom (40UH) panels and right (motor

end) end panel.

3. Remove 1/4 in. head screws (Item 5 in Fig. 37) along

length of unit that secure coil baffle to blower section and

remove front coil baffle.

4. Remove left blower section end (Item 2 in Fig. 44) insu-

lation (Item I in Fig. 44).

5. Use 7/16 in. socket to remove hex nuts (Fig. 40, Item 13;

Fig. 41, Item 8; Fig. 42, Item 9) securing end beating

bracket (Fig. 40, Item 12; Fig. 41, Item 7; Fig. 42, Item 8)

to blower section end.

6. Remove beating bracket assembly (Fig. 40, Items 12, 14,

13, 11; Fig.41, ltems 7, 10,9, 11; Fig. 42, Items 8, II, 10,

12) from blower section end. Use care to slide assembly

off of shaft end. Hold shaft from inside blower section

to prevent wheel damage.

7. Use 1/2 in. socket and 1/2 in. combination wrench to

remove hex nuts (Fig. 40, Item 13; Fig. 41, Item 9;

Fig. 42, Item 10) and bolts (Fig. 40, Item 11;Fig. 41, Item

11; Fig. 42, Item 12) holding bearing (Fig. 40, Item 14;

Fig. 41, Item 10; Fig. 42, Item 11) and bearing bracket

(Fig. 40, Item 12; Fig. 41, Item 7; Fig. 42, Item 8)

together.

Ensure sleeve bearing is installed with oil cup facing

upwards as shown in left side view.

8. Replace bearing (Fig. 40, Item 14; Fig. 41, Item 10;

Fig. 42, Item 11). Attach to beating bracket using hex

nuts and bolts. Align oil cup port with matching cutout in

bearing bracket.

9. Use 7/16in. socket to slide replacement beating (Fig. 40,

Item 14; Fig. 41, Item 10; Fig. 42, Item 11) on to the end

of shaft and install beating bracket assembly (Fig. 40,

Items 12, 14, 13, 11; Fig. 41, Items 7, 10,9, 11; Fig. 42,

Items 8, 11, 10, 12) in blower section end. Attach using

liex nuts.

10. Add 5 to 10 drops of SAE 20 or 30 non-detergent based

oil to bearing.

11. Rotate the fan shaft by hand to ensure that fans are

unrestricted and can rotate freely. Check for any fan

obstructions.

12. Reinstall left blower section end insulation (Item 1in

Fig. 44).

13. Reinstall V4 in. head screws (Item 5 in Fig. 37) along

length of unit securing coil baffle to the blower section.

14. Reinstall front (40UV) or bottom (40UH) panels. Rein-

stall end panels. Ensure that tag on each right front

panel (40UV) or middle botlom panel (40UH) match-

es unit tag.

15. Restore power to unit.

AUTOMATIC RESET

HIGH TEMPERATURE

LIMIT SWITCH

(SEE NOTES 2,3)

(SEE CAUTION)

MANUALRESET

HIGHTEMPERATURE

LIMITSWITCH

(SEE NOTES2,3)

(SEE CAUTION)

TEMPERATURE

SENSOR (OPTIONAL)

OPENING

DO NOT CHANGE LIMIT SWITCH CAPILLARY TUBE LOCA-

TION! LIMIT SWITCHES MAY NOT FUNCTION PROPERLY.

NOTES:

1. Not all components shown for clarity.

2. Supplied on electric heat units only.

3. Secure capillary tubes to blower housing using high temperature

cable tie. Capillary tube lengths will vary depending on unit size.

RETURN AIR

TEMPERATURE

SENSOR (OPTIONAL)

OPENING

Fig. 44 -- 40UV, UH Ventilator Blower Section Assembly Sheet Metal (All Units)

MOTORAND

COUPLING

SETSCREW

ACCESS

Damper Section Removal and Reinstallation

(Fig. 45)

Lock out and tag all power supplies to equipment and con-

trois prior to servicing unit. Follow all safety codes. Failure

to do so could result in personal injury.

The assembly order of the beating installation is critical. Be

careful with ell components during removal and installa-

tion. Any excessive force applied to these components can

cause unintended damage and void unit warranty.

To remove damper section:

1. Turn off all power to unit.

IMPORTANT: Tag each right front panel (40UV) or

middle bottom panel (40UH) for each unit. Panels have

electrical information specific to each unit.

2. Use 5/32in. hex (Allen) tool or Sis in. nut driver to remove

front (40UV) or bottom (40UH) panels and right end

panels.

3. Rernove four carriage bolts and unts securing kickplate to

end frames.

IMPORTANT: Tag kickplate for each unit. Kickplate

has electrical information specific to each unit,

4. Remove the two 1/4in. head screws securing kickplate to

the damper sides (one on each side) and remove

kickplate.

5. Remove 1/4 in. head screws attaching outside air (OA)

actuator to damper shaft or attaching locking quadrant as-

sembly to damper shaft. Remove OA actuator or locking

quadrant as_mbly.

6. Remove six I/4 in. head screws (3 per side) securing

damper to 40UH unit rear panel.

7. Remove two 5116 in. nuts attaching damper assembly to

back frame.

8. Remove damper assembly from unit,

To replace damper section:

I. Replace damper assembly into umt.

2. Replace 5/16in. nuts attaching damper assembly to back

frame.

3. Replace six 1/4 in. head screws (3 per side) securing

damper to 40UH unit rear panel.

4. Replace 1/4 in. head screws attaching OA actuator to

damper shaft OR attaching locking quadrant assembly to

damper shaft. Replace OA actuator or locking quadrant

assembly.

5. Replace the two 1/4 in. head screws securing kickplate

to the damper sides (one on each side) and remove

kickplate.

6. Replace four carriage bolts and nuts securing kickplate to

end frames.

7. Reinstall front (40UV) or bottom (40UH) panels. Rein-

stall end panels. Ensure that tag on each fight front

panel (40UV) or middle bottom panel (40UH) match-

es unit tag.

8. Restore power to the unit,

_oRDISCHARGE AIR

TEMPERATURESENSOR

.• OPENING

OPENING

BAFFLE

DAMPER SECTION _

_MOTOR & COUPLING

SETSCREW ACCESS

_COIL SECTION

ELECTRICAL

BOX

SECTION

NOTES: A

1. Unit shown in vertical orientation. Drawing applies to horizontal and vertical units.

2. Not all components shown for clarity.

Fig. 45 -- 40UV,UH Ventilator Damper Section Removal/Installation

TESTING

The Unit Ventilator Comfort Control module is designed for

easy checkout and commissioning using the Carrier Comfort

Network® (CCN) Service Tool. An RI14 service connector

jack is provided on each control board, which eliminates the

need to modify any communication wiring when service is

required. See Fig. 26.

Before any testing is performed, be sure all configuration

has been completed and the device address and bus nureber

have been changed from the factory defaults.

NOTE: No two devices should use the same address even if

they am not connected to the CCN system. The Comfort Con-

troller uses this unique addressing to provide a restart delay

upon returning from a power failure and a start delay during

normal operation. This prevents excessive demand by stagger-

ing the start time for each piece of equipment using a Unit

Ventilator Comfort Controller.

To test the Comfort Controller, perform the following

procedure:

1. The controller database must be uploaded into the Net-

work Service Tool which will be used to perform the

testing. This will allow access to all the necessary con-

figuration and status information. Follow the operating

instructions provided with the service tool and perform

the controller upload.

2. With the control switch in the CONT position, apply

power to the control. Verify the red LED on the control

board flashes ON and OFF at a 1-second rate. It may

take up to 5 seconds for this to occur initially as the

control board is performing a self-health diagnostic

check. Verify the fan starts to operate.

3. Using the Network Service Tool, select the controller

to be tested from the menu provided, then select the

DISPLAY function.

4. Using a digital thermometer to initially check and ver-

ify the temperature sensor, check the temperature val-

ues for the space/return air sensor, the supply air

sensor, and the mixed air and outdoor-air sensors if

installed. If an error exists between the actual value

and the displayed reading, determine the difference

between the two values, and enter a set point Trim (see

Table 24) in the configuration table for the appropriate

sensor. No correction is required for the supply air sen-

sor. If this sensor has more than a _+5 degree F error,

replace the sensor.

5. Next, test the controller inputs and outputs as applica-

ble. Verify that all modulating outputs are driven fully

closed after power has been applied to the controller

for at least 3 minutes. Verify that each water valve and

the outdoor-air damper are fully closed. Use the proce-

dures below to test the inputs and outputs as applicable

to each control.

NOTE: The control drives all modulating outputs, which have

been configured, dosed when first returning from a power fail-

ure restart, regardless of whether an output is normally open,

normally closed, or non-spring return type.

Water Valve Tests

The manual positioning lever on all water valves should

only be used when controller power is OFF. DO NOT

attempt to move this lever when controller power is

applied. If the position lever does not move freely for man-

ual positioning when the power is off, remove the valve

cover and push the solenoid plunger down using a small

screwdriver inserted in the slot below the solenoid.

MODULATING COOLING CONTROL -- If a modulating

chilled type water valve is used, verify that valve position is

fully closed while the unit is unoccupied and the fan is OFF.

Using the Network Service Tool, page down to the bottom of

the Points Display screen and select the COOLING 2 output.

Force the output to OFF. Next, select the COOLING 1 output

and force this output ON. Verify the chilled water valve begins

to open. Allow the valve to fully open and check to ensure the

valve reaches its full stroke and does not stick or bind. After the

valve has stopped opening, select the COOLING 2 output and

force it to ON. The force placed earlier on the COOLING 1

output should be removed automatically and the chilled water

valve should begin to close. After the valve has fully closed,

remove any forces from the COOLING I and COOLING 2

outputs.

HEATING VALVES -- If a modulating hot water or steam

type heating valve is used, verify the position of the valve is

fully closed while the unit is unoccupied and the fan is OFF.

Using the Network Service Tool, page down to the bottom of

the Points Display screen and select the HEATING 2 output.

Force the output to OFF. Next, select the HEA'ITNG 1 output

and force this output ON. Verify the heating valve begins to

open. Allow the valve to fully open and check to ensure the

valve reaches its full stroke and does not stick or bind. After the

valve has stopped opening, select the HEATING 2 output and

force it to ON. The force placed earlier on the HEATING 1out-

put should be removed automatically and the heating valve

should begin to close. After the valve has fully closed, remove

any forces from the HEATING 1 and HEATING 2 outputs.

Face and Bypass Damper Tests

COOLING CONTROL -- For units equipped with cooling,

verify that the face and bypass damper is in the full coil bypass

position when the unit is unoccupied and the fan is off. Verify

that the switch position indicator on the face and bypass damp-

er actuator is pointing to the zem (0) position at this time.

Verify the cooling valve is closed.

Using the Network Service Tool, page down to the bottom

of the Status display screen and select the Heating Enable Out-

put point. Force this output to OFF. Next, select the Cooling

Enable Output and force this point to ON. Select the COOL-

ING 2 output and force this point to OFF. Select the COOL-

1NG 1 output and force this point to ON. Verify the face and

bypass damper begins to move toward the coil face position

and the cooling valve opens. Check to ensure the valve reaches

the full open position and the damper moves to the coil face po-

sition without sticking or binding. After the damper reaches the

full coil face position, select the COOLING 2 output and force

it to ON. The force placed earlier on the COOLING 1 output

should be removed automatically, and the damper should begin

moving toward the bypass position. After the face and bypass

damper is in the bypass position, force the Coohng Enable Out-

put to OFF. Verify the cooling valve is closed or closing. After

the valve has fully closed, remove any forces from the COOL-

ING 2, Heating Enable, or Cooling Enable Outputs.

HEATING CONTROL- For units equipped with heating,

verify that the face and bypass damper is in the full coil bypass

position when the unit is unoccupied and the fan is off. Verify

that the switch position indicator on the face and bypass damp-

er actuator is pointing to the zero (0) position at this time.

Verify the heating valve is closed.

Using the Network Service tool, page down to the bottom of

the Points display screen and select the Cooling Enable Output

point. Force this output to OFF. Next, select the Heating Enable

Output and force this point to ON. Select the HEATING 2 out-

put and force this point to OFF. Select the HEATING 1 output

and force this point to ON. Verify the face and bypass damper

begins to move toward the coil face position and the heating

valve opens. Check to ensure the valve reaches the ftdl open

position and the damper moves to the coil face position without

stickingorbinding.Afterthedamperreachesthefullcoilface

position,selecttheHEATING2outputandforceittoON.The

force placed earlier on the HEATING 1 output should be re-

moved automatically, and the damper should begin moving to-

ward the bypass position. After the face and bypass damper is

in the bypass position, verify the heating valve is closing. After

the valve has fully closed, remove any forces from the HEAT-

ING 2, Heating Enable, or Cooling Enable Outputs.

Dampers

MODULATING OUTDOOR (OA) AIR DAMPER -- Veri-

fy the position of the OA damper is fully closed off to outdoor

air when the unit is off or unoccupied. Using the Network Ser-

vice Tool, page down to the bottom of the Status Display

screen and select the MIXED AIR DAMPER 2 output. Force

the output to OFF. Next, select the MIXED AIR DAMPER l

output and force this output ON. Verify the dampers begin to

open to outdoor air while dosing off the retm'n air damper. Al-

low the dampers to fully open and chock to ensure the outdoor-

air damper reaches its full open position and does not stick or

bind. After the damper has stopped opening, disconnect power

to the controller by setting the control to OFF. Verify the spring

return feature fully opens the return air damper while the out-

door-air damper fully closes. Return the control switch to

CONT and wait for the damper to again fully open to the out-

door air.

After the outdoor-air damper is fully open, select the

MIXED AIR DAMPER 2 output and force it to ON. The force

placed earlier on the MIXED AIR DAMPER 1 output should

be removed automatically. The outdoor-air dampers should be-

gin to close while the return air damper begins to open. After

the outdoor-air dampers fully close, remove any forces from

the two outputs.

Fan Tests -- The Unit Ventilator Comfort Control module

Vrovides a fan relay output which starts and stops the fan when

the control switch is in the AUTO position. A three-speed out-

put control is used to switch the fan from LOW speed to

MEDIUM or HIGH speed as required by the load.

FAN RELAY OUTPUT--Set the control switch to the

AUTO position and using the Network Service Tool, select the

Status Display screen and verify the FAN STATUS and FAN

RELAY both read OFF. Set the control switch to the AUTO

position. Select the FAN RELAY and force the point to ON.

Verify the fan starts and the FAN STATUS changes within

10 seconds. Reseloct the FAN RELAY and force the point to

OFF. Verify the fan stops and the fan status changes to OFF.

Remove any force applied.

THREE-SPEED FAN -- To verify proper operation of the

fan speed control, the unit must be in the Unoccupied mode.

With the fan stopped, set the control switch to the CONT posi-

tion. Verify the fan operates at low speed. Using the Network

Service Too1, page down through the Maintenance screen and

locate the FAN SPEED RELAY 1 point. Force the FAN

SPEED RELAY 1 output to ON. Verify the fan speed increases

to MEDIUM. Select the FAN SPEED RELAY 2 output and

force this point to ON. Verify the fan speed increases to HIGH.

Remove any forces from FAN SPEED RELAY 1 and FAN

SPEED RELAY 2.

FAN STATUS -- Set the control switch in the OFF position.

Using the Network Service Too1, select the Points Display

screen and verify the Supply Fan Status reads OFF. Set the con-

trol switch to the CONT position and verify the fan is operat-

ing. Verify the Supply Fan Status reads ON.

Filter Maintenance -- For units connected to a CCN

system, a dirty filter alarm is generated and reported as soon as

the operating hours of the unit exceed the configured filter

maintenance interval. "lhis is a software function of the control-

ler and does not require any testing.

To reset the alarm after the filters have been serviced, use

the Network Service Tool and select the filter status from the

Status Display screen. Force the point to CLEAN. After wait-

ing 10 seconds, remove the force using the AUTO command.

This will reset the timer and reset the displayed value to

CLEAN.

Remote Start Input- Set the control switch to the

OFF position and using the Network Service Too1, select the

Status Display screen and verify the FAN STATUS and FAN

RELAY both read OFF. Set the control switch to the AUTO

position. Using a jumper wire, temporarily jumper terminals

TB to T20 of the control board. Verify the FAN RELAY reads

ON, the fan starts and the FAN STATUS changes from OFF.

From the Status Display screen, determine the operating

MODE. Remove the jumper. If the operating mode previously

was cooling, die MODE will change to FAN ONLY as soon

as the jumper is removed. The fan will continue to operate for

5 minutes. For all other modes, the fan should stop within

5 seconds after the jumper is removed.

Sensors

AIR QUALITY SENSOR OPTION -- Using die Network

Service Too1, select the Stares Display screen and verify the

Air Quality (CO2 sensor) reads at least 300 ppm. Verify

the sensor is configured for a 2 to 10 vdc output over a 0 to

2000 ppm sensing range. The hardware jumper inside the sen-

sor near the terminal connection block must also be installed in

the proper position for a voltage output. Any further sensor

chockout requires the use of the User Interface Program and a

calibration gas to provide an accurate verification. Refer to the

instructions provided in the calibration gas kit and the User In-

terfaea Program for operation of these items.

HUMIDITY SENSOR OPTION -- Using the Network Ser-

vice Too1, select the Status display screen and verify the Rela-

tive Humidity reads the proper value. Be sure the local RH sen-

sor decision in the CCN Configuration table has been set to

YES. The 499-ohm resistor, which has been factory-supplied

with the sensor, must also be correctly installed. Use a sling

psychrometer or local humidity sensor to verify the sensor is

reading properly.

Fire Shutdown Option -- Using the Network Service

Too], select the Status display screenand verify the Fire Shut-

down statusreads NORMAL when the local smoke orfire de-

rectoris in die normal state. Set the controlswitch to the AUTO

position, and force the FAN RELAY output ON. Verify the fan

start and the FAN STATUS reads ON. Trip the local smoke de-

tectur or fire detector and verify the Fire Shutdown input reads

ALARM, the supply fan immediately stops, and the FAN

STATUS reads OFF. Place the control switch in the CONT

position and verify the supply fan remains off. Reset the smoke

or fire detector and verify the supply fan restarts. Remove

all previous forces and set the control switch back to the OFF

position.

Electric Heat and Direct Expansion Cool-

ing- Electric heat and direct expansion cooling control

functions utilize both mechanical and software integrated safe-

ties which prevent the testing of these functions independently

of the equipment operation. These require that the equipment

be operating in order to prevent equipment damage. All previ-

ous testing must be completed prior to performing any DX and

electric heat tests.

ELECTR!C HEAT -- Set the control switch to the OFF posi-

tion. Using the Network Service Tool, select the Status Display

screen and verify the FAN STATUS and FAN RELAY both

read OFF. Verify a controlling temperature of 85 F or less. If

not, force the value to 70 ESet the control switch to the AUTO

position. Select the Remote Start point and force the point to

ON. Verify the fan starts and the FAN STATUS changes. Select

the Set Point screen and increase the Occupied Switch Set

Point to 90 F. Select the Points Display screen and verify the

Heating 1 output reads ON. If two stages am used, verify the

second stage is set to ON within two minutes. Verify both elec-

tric heat control relays are energized. Verify the electric heater

stage(s) are enabled and that the supply-air temperature in-

creases. Select the Set Point screen and return the set points to

their original values. Reselect the Remote Start input and set

the point to AUTO. Verify the supply fan stops and the Fan Sta-

tus changes to OFF. Reselect the Controlling Temperature

point and AUTO this point if it had previously been forced.

DIRECT EXPANSION COOLING -- Set the control switch

to the OFF position and the condensing unit disconnect to OFF.

Using the Network Service Tool, select the Points Display

screen and verify the FAN STATUS and FAN RELAY both

read OFF. Verify the Controlling Tempea'ature is greater than

55 F. If not, force the value to 70 E Set the control switch to the

AUTO position. Select the Remote Start point and force the

points to ON. Verify the fan starts and the FAN STATUS

changes. Select the Set Point screen and decrease the Occupied

Heating Set point to 40 F and decrease the Occupied Cooling

set point to 45 E Verify the outdoor-air temperature reads

above the configured DX Outdoor Air Lockout value. If not,

force the Outside-Air Temperature to 90 E Select the Points

Display screen and verify the Cooling 1 output reads ON. If

two stages are used, verify the second stage is set to ON within

2minutes. Verify both accessory relays are energized. Set the

condensing trait disconnect to ON. Verify the DX coohng

stage(s) are enabled and that the supply-air temperatme

decreases. Allow the unit to operate for 2 minutes minimum.

Select the Set Point screen and return the set points back to

their original values. Re.select the Remote Start input and

AUTO the point. Verify the mode changes to Fan Only. Resc-

lect the Controlling Temperature point and AUTO this point

if it had previously been forced. Reselect the Outside-Air

Temperature point and AUTO this point if it had previously

been forced. Allow the fan to operate to evapomtz the conden-

sate from the coil. The supply fan will stop automatically after

approximately 5 minutes.

Mixed-Air Damper Sensor Final Calibra-

tion -- The mixed-air damper control uses a temperature dif-

ference method to maintain the minimum outdoor-air ventila-

tion. For this reason, it is important that the sensors be calibrat-

ed to ensure that the de_Ctredquantity of outdoor air is provided

at any operating speed.

IMPORTANT: The Comfort Controller requires that

each unit be equipped with its own outdoor-air sensor

installed for mixing box applications. A broadcasted

OAT value from a single location will not ensure that the

outdoor-air temperature is being correctly measured for

an individual _t

To perform a final calibration for the sensors:

1. Set the control switch to the OFF position and using

the Network Service Tool, select the Display screen

and verify the FAN STATUS and FAN RELAY both

read OFF.

Set the control switch to the CONT position.

Using the Network Service Tool, page down to the

bottom of the Points Display screen and select the

MIXED-AIR DAMPER 2 OUTPUT. Force the output

to OFF.

4. Next, select the MIXED-AIR DAMPER 1output and

force this output ON. Wait for the dampers to fully

open to outdoor air while closing off the return-air

damper. Allow the unit to operate for 5 minutes after

the OA damper reaches its fully open position.

5. Verify the mixed-air temperature is within 0.3 ° F of

the outdoor-air temperature value. Using the OAT

(Fig. 24) function, adjust the Outdoor-Air Value so that

both sensors read the same relative temperature. (The

values should have been previously verified for accu-

racy earlier.)

6. Select the MIXED AIR DAMPER 2 output and force

it to ON. The force placed earlier on the MIXED-AIR

DAMPER 1 output should be removed automatically

and the OA dampers should begin to close while the

return-air damper begins to open.

7. After the OA dampers fully close, allow the unit to

operate for 5 minutes. Verify the return-air temperature

is within 0.3 °F of the mixed-air temperature reading.

If not, adjust the return-air temperature reading using

the OAT (Fig. 24) function so that both sensors read

the same temperature. (The value of the mixed-air

temperature and outdoor-air temperature were previ-

ously trimmed and should not be readjusted.)

8. Reselect the FAN RELAY and force the point to OFF.

Verify the fan stops and the FAN STATUS changes to

OFF. Remove the forces previously placed on the

MIXED-AIR DAMPER 1 and 2 outputs.

Testing Completion -- After all checkout and testing

has been completed, set the controller time by using the Build-

ing Time feature of the Network Service Tool (do NOT use the

Controller Time Function). After disconnecting from the unit,

CYCLE THE UNIT POWER to reset the valve and damper

positions and restore automatic control. Although the Unit

Ventilator Comfort Control module will not respond, the

controller will begin to maintain a software clock so that any

Network Alarm message will contain the correct time and date

stamp.

Additionally, the database for each control should be stored

on a 3.5 in. computer disk for future service use. The CCN Net-

work Service provides an Export function for this. Refer to the

Service Too1operating inslructions for fin'ther information. The

database disk will provide an easy method of reprogramming a

control board should it ever become necessary to replace it. All

the control configuration, set points, sensor trim information,

and controller addressing information is stored for easy down-

loading into a replacement control board assembly.

Unit Diagnostics and Troubleshooting -- See

Table 30 for 40UV,UFI diagnostics and troubleshooting

information.

Table 30 -- Unit Diagnostics And Troubleshooting

PROBLEM POSSIBLE CAUSE

Unit Does Not Operate Power to control is OFF

Remote Start/Stop (S/S) jumper not installed (for

stand-alone operation only)

Faulty connections

Control switch is in OFF positionor safety controls

are tripped

Smoke or tire detector is tripped, detector wiring

shorted

No Heating

No Cooling

Overheating

Overcooling

Mixed Air Damper Wgl

Not Operate

Damper Fails to Operate

Properly at Minimum

Position

Temperature Sensor Not

Reading Correctly

Heating is forced disabled

No hot wster/stearrde]ectricity

Electric heater safety tripped

Configuration error

No power to valve or relays

End switch improperly set (on Face and Bypass

units only)

Incorrect sensor reading

No fan status

Cooling is forced disabled

No chilled water/electricity

Condensing unit safetytripped

Configuration error

No power to valve or relays

Outdoor air temperature below DX outdoor air lock-

out

End switch improperly set (on Face and Bypass

units only)

incorrect sensor reading

No fan status

Heat outputs are forced

Configuration error

Cooling outputs are forced

Configuration error

Campers are forced

No power to actuator

Configuration error

Failed sensor (shortened or open)

No fan status

Incorrectly calibratedsensors

Loose connections

Sensor out of calibration

CORRECTIVE ACTION

Check localdisconnect or circuitbreaker,

Install jumper between T20 on control module and TB

(24 vac),

Check LED on control beard, If not flashing at a 1-second

rate, check for loose connections and 24 vac on POWER

connector.

Verify control switch is in the AUTO or CONT position,

Check for a tripped LL'I_

Check the status of the Fire Shutdown input, Determine

cause of detector trip and correct it necessary, Check for

shorted wiring and correct it necessary,

Verify no forces are present inthe Heating 1, Heating 2 or

Heating Enable outputs; remove if necessary,

Check source and correct any problems.

Determine cause for safety trip,typically insufficientair-

flow, Correct condition and reset safety switch in heater

contrst box.

Verify the control is configured properly for the type of

heat used.

Check for 24 vac at water valve. If no power, check for

open wiring.

Referto Face and Bypass Damper testing to verify proper

operation of end switch and water valves.

Verify the temperature sensors are reading the correct

temperatures.

Verify the Fan Status reads ON. Fan Status must read ON

for heat to operate.

Verify no forces are present in the Cooling 1, Cooling 2 or

Heatin_l Enable outputs; remove it necessary.

Check source and correct any problems.

Determine cause for safety trip, correct condition and

reset safety switch incondensing unit control box.

Verify the control is configuredproperly forthe type of

cooling used.

Check for 24 vac at water valve. If no power, check for

open wiring.

Verify DX Outdoor Air Lockout is correctly set to the mini-

mum recommended condensing unit operating tempera-

ture. Verify OAT sensor is reading correctly

Refer to Face and Bypass Damper Tests to verify proper

operation of end switch and water valves.

Verify the temperature sensors are reading the correct

temperatures.

Verify the Fan Status reads ON. Fan Status must read ON

for coolingto operate.

Verify no forces are preseut on the Heating 1 or Heating 2

outputs. Remove if necessary.

Verify the control is configured properly for the type of

heating used.

Verify no forces are present on the Cooling 1 or Cooling 2

outputs. Remove if necessary.

Verify the control is configured properly for the type of

cooling used.

Verify no forces are present on the MIX1 or MIX2 outputs.

Remove ifnecessary.

Check for 24 vac. If no power, check for open wiring.

Verity the control is properly configuredfor modulating

type OA damper.

Verity the temperature sensors are reading correctly.

Replace any bad sensor.

Verify the Fan Status reads ON. Fan Status must read ON

for dampers to operate.

Verity sensors are properly calibrated (reter to the test

section and repeat the calibration procedure). Verify no

forces are present on MAT, OAT,or SPT.

Verify all sensor lead connections are securely fastened.

Recheck each sensor reading usinga digital thermometer

as areference. Reset the TRiM value to zero before test-

ing each sensor (OAT,MAT, and RAT/SPT). Replace any

sensor requirin_ more than 5 degrees of correction.

Table30 -- Unit Diagnostics and Troubleshooting (cont)

PROBLEM POSSIBLE CAUSE CORRECTIVE ACTION

Indoor Air Quality (IAQ) IAQ not enabled Enable IAQ control operation.

Features Maffunctioning Set pointtoo high/too low Adjust the set pointto the correct value.

Space or return air temperature too high/low Controlwill resume when space/returns temperatures

recover.

Space Reletive Humiditytoo high Controlwill resume when relative humidity recovers.

Verify high humiditylimitis configured properly.Reset to

100% ifRH contro/is not used.

MAT sensor is shorted, open, or forced Normal operation will resume when MAT sensor is

operating properly. Remove Force; repair or replace MAT

sensor.

LLT Trips Frequently LLT switch malfunctioning Reptace LLT switch.

MAT sensor failed or out of calibration Verify MAT sensor is reading correctly.Trim or replace if

necessary.

IAQ Level Exceeds Maximum output value set too low Verify maximum output value has been correctly set.

Set Point Frequently Increase value in 10% increments.

(Generated Alarms) OAT sensor failed or open Normal operation will resume when OAT sensor is

repaired.

LEGEND

DX -- Direct Expansion

IAQ -- Indoor Air Quality

LED -- LightEmitting Diode

LLT -- Low-LimitThermostat

MAT -- Mixed-AirTemperature Sensor

MIX1 -- Mixed Air 1Terminal

MIX2 -- Mixed Air 2Terminal

OA -- Outdoor Air

OAT -- Outdoor-Air Temperature Sensor

RH -- Relative Humidity

RAT -- Return-Air Temperature

SPT -- Space Temperature Sensor

TB -- Terminal Box

Manufacturer m_erves the right to di_.ontinue, or _ange at any time, specilTw.atJonsor designs without noti_ and without incurring obligations.

Book 3 Catalog No. 534-094 Printed in U.S.A. Form 40LIV,UH-6SI Pg 72 1-06A 7-05 Replaces: 40UV, UH-3SI

CARRIER Air Conditioner/heat Pump(outside Unit) Manual L0601181

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