CARRIER Air Conditioner/heat Pump(outside Unit) Manual L1001418

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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AQUAZONE TM
50PSH, PSV, PSD006-070
Single-Stage Water Source Heat Pumps
with PURON ® Refrigerant (R-410A)

Installation, Start-Up, and
Service Instructions
CONTENTS
Page
SAFETY CONSIDERATIONS .......................
2
GENERAL ..........................................
2
INSTALLATION ..................................
2-31
Step 1 -- Check Jobsite ............................
2
Step 2 -- Check Unit ...............................
3
• STORAGE
• PROTECTION
• INSPECT UNIT
Step 3 -- Locate Unit ..............................
8
• FIELD CONVERSION OF DISCHARGE AIR
Step 4 -- Mount the Unit ...........................
9
• HORIZONTAL UNIT
• VERTICAL UNITS
Step 5 -- Check Duct System ......................
9
• SOUND ATTENUATION
• EXISTING DUCT SYSTEM
Step 6 -- Install Condensate Drain .................
9
• HORIZONTAL UNIT
• VERTICAL UNITS
• VENTING
Step 7 -- Pipe Connections .......................
l0
• WATER LOOP APPLICATIONS
• GROUND-WATER APPLICATIONS
• GROUND-LOOP APPLICATIONS
• INSTALLATION OF SUPPLY AND RETURN HOSE
KIT
Step 8 -- Wire Field Power Supply ................
13
• POWER CONNECTION
• SUPPLY VOLTAGE
• 208-VOLT OPERATION
• 460-VOLT OPERATION
Step 9 -- Wire Field Controls .....................
27
• THERMOSTAT CONNECTIONS
• WATER FREEZE PROTECTION
• AIR COIL FREEZE PROTECTION
• ACCESSORY CONNECTIONS
• WATER SOLENOID VALVES
• WSHP OPEN WIRING
Step 10 -- Operate ECM Interface Board ..........
29
• COOLING
• HEATING
• CFM ADJUST
• DEHUMIDIFICATION MODE
PRE-START-U P ...................................
32
System Checkout .................................
32
FIELD SELECTABLE INPUTS ..................
32-35
Complete C Control Jumper Settings .............
32
Deluxe D Control Jumper Settings ................
32
Complete C Control DIP Switches .................
32
Deluxe D Control DIP Switches ...................
32
Units with Modulating Hot Water Reheat
(HWR) Option ...................................
33
Deluxe D Control Accessory
Relay Configurations
...........................
35

Page
START- UP ......................................
35-42
Operating Limits ..................................
35
Scroll Compressor Rotation .......................
35
Unit Start-Up Cooling Mode .......................
35
Unit Start-Up Heating Mode .......................
36
Unit Start-Up with WSHP Open Controls ..........
40
Flow Regulation ...................................
41
Flushing ..........................................
41
Antifreeze .........................................
41
Cooling Tower/Boiler Systems ....................
42
Ground Coupled, Closed Loop and Plateframe
Heat Exchanger Well Systems ...................
42
OPERATION ....................................
42-46
Power Up Mode ...................................
42
Units with Aquazone Complete C Control .........
42
Units with Aquazone Deluxe D Control ............
42
Units with HWR Option ............................
43
Units with WSHP Open Multiple Protocol ..........
43
COMPLETE C AND DELUXE D BOARD
SYSTEM TEST ...............................
46,47
Test Mode .........................................
46
WSHP Open Test Mode ............................
47
Retry Mode ........................................
47
Aquazone Deluxe D Control LED Indicators ....... 47
SERVICE .......................................
48,49
Filters .............................................
48
Water Coil .........................................
48
Condensate Drain Pans ...........................
48
Refrigerant System ................................
48
Compressor .......................................
48
Fan Motors ........................................
48
Condensate Drain Cleaning .......................
48
Air Coil Cleaning ..................................
48
Condenser Cleaning ..............................
48
Checking System Charge .........................
49
Refrigerant Charging ..............................
49
Air Coil Fan Motor Removal .......................
49
Replacing the WSHP Open Controller's
Battery ..........................................
49
TROUBLESHOOTING ...........................
49-57
Control Sensors ...................................
49
Thermistor ........................................
49
WSHP Open Controller ............................
50
Thermostatic Expansion Valves ...................
50
Stopped or Malfunctioned ECM Motor .............
54
Moisture Check ....................................
55
APPENDIX A -- WSHP OPEN SCREEN
CONFIGURATION ............................
58-63
50PSH,PSV, PSD START-UP
CHECKLIST ............................
CL-I, CL-2

starting
installation.
IMPORTANT:
Read the entire instruction manual before |

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Catalog No. 04-53500055-01
Printed in U.S.A.
Form 50PS-3SI
Pg 1
7-09
Replaces: 50PS-2SI

SAFETY

CONSIDERATIONS

Installation and servicing of air-conditioning equipment can
be hazardous due to system pressure and electrical components. Only trained and qualified service personnel should
install, repair, or service air-conditioning
equipment.
Untrained personnel can perform basic maintenance functions such as cleaning coils and filters and replacing filters. All
other operations should be performed by trained service personnel. When working on air-conditioning equipment, observe
precautions in the literature, tags and labels attached to the unit,
and other safety precautions that may apply.
Improper installation, adjustment, alteration, service, maintenance, or use can cause explosion, fire, electrical shock or
other conditions which may cause personal injury or property
damage. Consult a qualified installer, service agency, or a local
distributor
or branch for reformation
or assistance.
The
qualified installer or agency must use factory-authorized
kits or
accessories when modifying this product. Refer to the individual instructions packaged with the kits or accessories when
installing.
Follow all safety codes. Wear safety glasses and work
gloves. Use quenching cloth for brazing operations. Have fire
extinguisher available. Read these instructions thoroughly and
follow all warnings or cautions attached to the unit. Consult
local building codes and the National Electrical Code (NEC)
for special installation requirements.
Understand the signal words -- DANGER. WARNING,
and CAUTION. DANGER identifies the most serious hazards
which will result in severe personal
injury or death.
WARNING signifies hazards that could result in personal iNury or death. CAUTION is used to identify unsafe practices,
which would result in minor personal injury or product and
property damage.
Recognize
safety reformation.
This is the safety-alert
symbol (z_k)- When this symbol is displayed on the unit and in
instructions or manuals, be alert to the potential for personal

injury.

Electrical shock can cause personal Njury or death. Before
installing or servicing system, always turn off main power
to system. There may be more than one disconnect switch.
Turn off accessory heater power if applicable.

Water source heat pumps (WSHPs)
zontally and vertically mounted units
designed
for year-round
cooling
WSHPs are available in the following
•
•
•

are single-package horiwith electronic controls
and heating.
Aquazone
unit configurations:

50PSH unit with horizontal airflow and right, left or back
discharge
50PSV unit with vertical airflow and top discharge
50PSD unit with vertical airflow and bottom discharge
(downflow)
IMPORTANT: The installation of water source heat pump
units and all associated components, parts, and accessories
which make up the installation shall be in accordance with
the regulations of ALL authorities having jurisdiction and
MUST conform to all applicable codes. It is the responsibility of the installing contractor to determine and comply
with ALL applicable codes and regulations.

INSTALLATION
Step 1 E Check Jobsite E Installation, operation and
maintenance instructions are provided with each unit. Before
unit start-up, read all manuals and become familiar with the
unit and its operation. Thoroughly check out the system before
operation. Complete the inspections and instructions
listed
below to prepare a unit for installation. See Table 1 for unit
physical data.

IMPORTANT: This equipment is designed for indoor
installation ONLY. Extreme variations in temperature,
humidity and corrosive water or air will adversely affect
the unit performance, reliability and service life.
HORIZONTAL UNIT (50PSH) -- Horizontal units are designed for indoor installation only. Be sure to allow adequate space
around the unit for servicing. Ret_r to Fig. 1 for an illustration of
a typical horizontal installation. See Fig. 2 for overall unit
dimensions.
VERTICAL AND DOWNFLOW
UNITS (50PSV, PSD) -Vertical units are designed for indoor installations. While vertical units are typically installed in a floor-level closet or a small
mechanical room, the unit access guidelines for these units are
very similar to those described for horizontal units. See Fig. 3
and 4 for overall dimensions. Refer to Fig. 5 for an example of
a typical vertical installation. Refer to Fig. 6 for a sample
downflow installation.

GENERAL
This installation and start-up instructions literature is for
Aquazone TM single-stage water source heat pump systems.

To avoid equipment damage, do not use these units as a
source of heating or cooling during the construction process. The mechanical components and filters used in these
units quickly becomes clogged with construction dirt and
debris which may cause system damage.

Table 1 -- Physical Data -- 50PSH, PSV, PSD018-070 Units
50PS

006"I oog* I 9t2"

UNIT SIZE

COMPRESSOR

(1 Each)

FACTORY

CHARGE

ECM FAN

MOTOR

R-410A
AND

Fan Motor (Hp)
Blower
Wheel Size

(oz)

WATER

VOLUME
CONNECTION

HWG CONNECTION

(D x W) (in.)

(gal.)
SIZE,
SIZE,

FPT (in.)

VERTICAL
UPFLOW/DOWNFLOW
Air Coil Dimensions
(H x W) (in.)
Throwaway
Filter, Standard
1-in.,
Qty._Size

Weight
Operating
Packaged

Scroll

136

144

N/A
N/A

1/2
9x7

1/2
11x10

1
11x10

1/25
N/A
6 x 5
0.56

1/20
N/A
6 x 5
0.56

N/A

6x5
0.56

9x7
0.56

9x7
0.76

10x10
0.92

3&
10x10
1.24

1
11x10
1.56

.17

.29

.45

.56

.76

.92

1.24

1.56

1/2

3/4

N/A

16x16

16 x 16

24 x 20

28 x20

28 x 20

28 x 25

32 x 25

1_,
16x20

1_.
16 x 20

1._
24 x 24

1_,
28 x 24

1_,
28 x 30

2_.
16 x 30

36 x 25
1..,
16x30;
1..,
20 x 30

36 x 25
1,.,
16x30;
1.,
20 x 30

126
136

146
156

150
160

252
262

266
276

268
278

327
337

414
424

416
426

441
451

443
453

16x16

16 x 16

18 x 27

18 x 31

20 x 35
1_,

20 x 40
1_.

20 x40
1_.

20 x 45

1_,
16x20

1_.
16x20

2_.
18x18

2_,
18x18

12x 20;
1,.,
20 x 25

18x20;
1.,.
20 x 24

2._
20x24

2_,
20x24

136
146

156
166

160
170

257
267

266
276

268
278

327
337

414
424

416
426

441
451

443
453

45.0
33,0
30.0
28.0

55.0
36.0
33.0
32.0

56,0
37.0
34,0
33.0

74.7
66,2
63,6
47.5

78.8
69.9
67.2
50.2

79,4
70.4
67.7
50.5

104,4
83.7
74.9
64.0

144.3
97.7
92.1
79.9

145,0
98.1
92.6
80.3

182.3
78.4
72.5
107.8

183.1
78.8
72.8
108.3

BLOWER

PSC FAN MOTOR AND BLOWER
(3 Speeds)
Fan Motor (Hp)
High Static Fan Motor (Hp)
Blower
Wheel Size (D x W) (in.)
Heat Exchanger
Water Volume (gal.)
COAXIAL

018 I o24 I 989 I o38 I o42 I 948 I 969 I 979

Rotary

(Ib)
(Ib)

1/5

1_
1_

N/A
11 x10
1.56
1.56

HORIZONTAL
Air Coil Dimensions
(H x W) (in.)
Throwaway
Filter, Standard
1-in.,
Qty._Size

Weight
Operating
(Ib)
Packaged
(Ib)
Corner
(Ib)
Left Front
Left Rear
Right Front
Right Rear

LEGEND
ECM -FPT -HWG --

Electronically Controlled Motor
Female Pipe Thread
Hot Water Generator

PSC -TXV --

Permanent Split Capacitor
Thermostatic Expansion Valve

Step 2 -- Check Unit -- Upon receipt of shipment at

*Unit sizes 006-012 not available on 50PSD unit.
NOTE: All units have spring compressor mountings, TXV expansion devices, and 1/2in. and 3/4-in. electrical knockouts.

the jobsite, carefully check the shipment against the bill of
lading. Make sure all units have been received. Inspect the carton or crating of each unit, and inspect each unit for damage.

Ensure the shipping company makes proper notation of any
shortages or damage on all copies of the freight bill. Concealed
damage not discovered during unloading must be reported to
the shipping company within 15 days of receipt of shipment.
NOTE: It is the responsibility
of the purchaser
necessary claims with the shipping company.

Be sure the installation
areas, private offices
spaces.

location is isolated from sleeping
and other acoustically
sensitive

NOTE: A sound control accessory package may be used
to help eliminate sound in sensitive spaces.
3.

Check local codes to be sure a secondary
required under the unit.

drain pan is not

Be sure unit is mounted at a height sufficient to provide
an adequate slope of the condensate lines. If an appropriate slope cannot be achieved, a field-supplied condensate
pump may be required.

Provide sufficient space for duct connection. Do not allow the weight of the ductwork to rest on the unit.

Provide adequate clearance for filter replacement
and
drain pan cleaning. Do not allow piping, conduit, etc. to
block filter access.

necessary.
Provide an unobstructed path to the unit within the closet
or mechanical room. Space should be sufficient to allow
removal of unit if necessary.

Provide ready access to water valves and fittings, and
screwdriver access to unit side panels, discharge collar,
and all electrical connections.

10.

Where access to side panels is limited, pre-removal of the
control box side mounting screws may be necessary for
future servicing.

to file all

1. Be sure that the location chosen for unit installation provides ambient temperatures maintained above freezing.
Well water applications
are especially
susceptible to
freezing.
2.

Provide sufficient access to allow maintenance
and
servicing of the fan and fan motor, compressor and coils.
Removal of the entire unit from the closet should not be

STORAGE -- If the equipment is not needed ilrnnediately at
the jobsite, it should be left in its shipping carton and stored in a
clean, dry area of the building or in a warehouse. Units must be
stored in an upright position at all tflnes. If carton stacking is
necessary, stack units a maximum of 3 high. Do not remove
any equipment from its shipping package until it is needed for
installation.
PROTECTION -- Once the units are properly positioned on
the jobsite, cover them with either a shipping carton, vinyl fihn,
or an equivalent protective covering. Cap open ends of pipes
stored on the jobsite. This precaution is especially important in
areas where painting, plastering, or spraying of fireproof material, etc. is not yet complete. Foreign material that accumulates
within the units can prevent proper start-up and necessitate
costly clean-up operations.

Before
installing
anyofthesystem
components,
besureto
examine
each
pipe,fitting,andvalve,andremove
anydirtor
foreign
material
foundinoronthese
components.

3. Verifythattheunit'srefrigerant
robing
isfreeofkinksor
dents,
andthatit does
nottouch
otherunitcomponents.
4. Inspect
allelectrical
connections.
Besureconnections
are
clean
andtightattheirterminations.
5. Loosen
compressor
boltsuntilthecompressor
ridesfreely
onsprings.
Remove
shipping
restraints.
6. Remove
thefour1/4in.shipping
boltsfromcompressor
support
plate(twoboltsoneach
side)tomaxilnize
vibrationandsound
alternation.

DONOTstore
orinstallunitsincorrosive
environments
or
in locations
subject
totemperature
or humidity
extremes
(e.g.,attics,garages,
rooftops,
etc.).Corrosive
conditions
andhightemperature
orhumidity
cansignificantly
reduce
performance,
reliability,
andservice
life. Alwaysmove
unitsinanupright
position.
Tiltingunitsontheirsides
may
cause
equipment
damage.

Failure
toremove
shipping
brackets
fromspring-mounted
compressors
will cause
excessive
noiseandcouldcause
component
failureduetoadded
vibration.

INSPECT
UNIT-- Toprepare
theunitforinstallation,
colnplete
theprocedures
listedbelow:
1. Compare
theelectrical
dataontheunitnameplate
with
ordering
andshippinginformation
to verifythatthe
correct
unithasbeen
shipped.
2. Donotremove
thepackaging
untiltheunitisreadyfor
installation.

3/8" threaded
(by others)
FilterAccess

Remove any blower support cardboard froln inlet of the
blower.

Locate and verify any accessory kit located in compressor
and/or blower section.

Remove any access panel screws that may be difficult to
remove once unit is installed.

rods
___

Return
Thermostat
Wiring

Field-supplied transition
minimize pressure loss

,Power Wiring

Balancing
Stainless steel
braid hose

Supply Air

Valve (fieldY)

Low Pressure Drop Water
Control Valve (optional)
(field-instNled accessory)
Unit
Building

Flexible
Insulated supply duct with

Connection

at least one 90 degree elbow
to reduce air noise
(field-supplied)

Field-Supplied
Electric Heat
(if applicable)

Unit Power
Disconnect
(by others)

Aux Electric
Heat Disconnect

Waterln

Unit Hanger
(factorysupplied)

(fieldqnstalled
accessory)

3/8" Threaded
Rod (by others)
Vibration

Isolator

(white-compressor
and red-blower

end
end)

Double Hex Nuts
(by others)

Integral hanger supportpre-attached in factory

UNIT HANGER ISOLATION DETAIL
Fig. 1 --Typical

Installation-

50PSH Unit

Ball Valve with optional
integral P/Tplug (typical for supply
and return piping) (field-installed accessory)

OVERALL
CABINET
(in.)

50PSH
UNIT
SIZE

B
Depth

C
Height

D
In

E
Out

F
HWG
In

G
HWG
Out

1
Loop
Water
FPT

H
Condensate

Loop
In D

112

314

Cond

Loop
Out E

Low
Voltage

Ext
Pump

Power
Supply

M
(LH
rtrn)

O
Supply
Height

P
Supply
Width

Q
(RH
rtrn

S
Return
Depth

T
Return
Height

22.4

43.1

17.3

3.7

9.7

N/A

0.8

1/2

N/A

3.8

6.3

8.8

5.3

4.1

9.0

5.3

4.1

17.1

15.3

2.1

1.0

22.4

62.2

19.3

2.1

10.0

13.9

16.9

0.6

3/4

1/2

2.1

10.0

3.6

6.1

8.6

3.6

2.0

12.5

15.5

3.6

2.0

28.1

16.2

2.3

1.5

024,
030

22.4

62.2

19.3

2.1

10.0

13.9

16.9

0.6

3/4

1/2

5.26

13.13

3.6

6.1

8.6

3.6

2.0

12.5

15.5

3.6

2.0

33.8

16.2

2.3

1.5

036

25.4

71.2

21.3

3.4

10.8

15.6

18.9

0.6

3/4

1/2

5.96

13.13

3.6

6.1

8.6

3.1

1.2

19.0

17.5

3.1

34.8

18.2

3.1

1.5

042,
048

25.4

76.2

21.3

3.4

10.8

15.6

18.9

0.6

1/2

5.96

13.13

3.6

6.1

8.6

3.1

1.2

19.0

17.5

3.1

39.8

18.2

3.1

1.5

060,
O7O

25.4

81.2

21.3

3.4

10.8

15.6

18.9

0.6

1/2

5.96

13.13

3.6

6.1

8.6

3.1

1.2

19.0

17.5

3.1

44.8

18.2

3.1

1.5

NOTES:

3.
4.

112

HWG
FPT

RETURN
CONNECTION
(in.)
USING RETURN
AIR OPENING
(-+0.10 in.)

DISCHARGE CONNECTION
(in.)
DUCT FLANGE INSTALLED
(-+0.10 in.)

018

00_2v9
,_nn

1.
2.

ELECTRICAL
KNOCKOUTS
(in.)
J

A
Width

WATER
CONNECTIONS (in.) UNITS WITH
HWR

WATER CONNECTIONS
(in.)

Condensate is 3/4-in. FPT copper.
Horizontal unit shipped with filter bracket only. This bracket should be
removed for return duct connection.
Discharge flange and hanger kit is factory installed.
Shaded areas are recommended service areas, not required.

ASP
BSP
CAP
CSP
FPT
HWG
HWR
LH
RH

LEGEND
Alternate Service Panel
Blower Service Panel
Control Access Panel
Compressor Service Panel
Female Pipe Thread
Hot Water Generator
Hot Water Reheat
Left Hand
Right Hand

----------

PSC BLOWER AIRFLOW
CONFIGURATION
CODE

LEFT RETURN
2' Service
Access

RETURN

DISCHARGE

Left

Back

Right

Back

Left

Right

Left

RIGHT

RETURN
Front

CSP

2' Service
Access

2' ServiceAccess
Power Supply
3/4" Knockout
1.6"

Right

Return

3.25-

R*ght

_--x.[

",W

Ioltll

_"_l_l

_A_

Back
Discharge

P
I

Unit Hanger

Back
Discharge

Detail

.......
_n.

Condensate
3/4" FPT

Front-View

3/4" FPT

BSP

Left
Discharge

_,.

24,5

in.
20.3

)06-012

43,1

)18-030

62,1

24,5

20.3

]36

71,1

27,5

23.3

342-048

76.1

27.5

23.3

36O,,070

81,1

27,5

23.3

x
Configuration

Configuration

E - Left Return / Back Discharge

B - Right

Return

/ Back

Discharge

o:o:
cO Left

Right
View

/I B,o e,l

ASP

CSP

Front

'_M
Configuration

Configuration

S - Left Return / Right Discharge - Air Coil Opening

Z - Right Return / Left Discharge - Air Coil Opening

1.1"
Air Coil
V

I U I /V

Right

Left _T
View

ASP
Ul--S-

jAir

Coil
CSP

T View

!
Front

B
Confic

uration S - Left Return / Right Discharge - Air Coil Opening

Configuration

Z - Right Return / Left Discharge - Air Coil Opening

Fig. 2 -- 50PSH Dimensional Data

OVERALL
CABINET
(in.)

50PSV
UNIT
SIZE

WATER
CONNECTIONS (in.) UNITS WITH
HWR

WATER CONNECTIONS
(in.)

ELECTRICAL
KNOCKOUTS
(in.)
J

E
Out

F
HWG
In

G
H
HWG CondenOut
sate

Loop
Water
FPT

HWG
FPT

1/2

Cond

RETURN
CONNECTION
(in,)
USING RETURN
AIR OPENING
(-+0.10 in.)

DISCHARGE
CONNECTION
(in.)
DUCT FLANGE INSTALLED
(-+0.10 in.)
L
3/4

Cond

Ext
Pump

Power
Supply

M
(LH
rtrn)

O
Supply
Width

P
Supply
Depth

Q
(RH
rtrn)

S
Return
Depth

T
Return
Height

A
Width

B
Depth

C
Height

D
In

00_2vg
,_nn

22.4

21.6

34.5

3.7

9.7

N/A

7.4

'/2

N/A

3.8

6.3

8.8

6.7

6.3

9.0

6.7

2.3

17.1

15.3

1.0

018

22.4

25.6

44.6

2.1

10.0

13.9

16.9

7.8

3/4

1/2

2.1

10.0

3.6

6.1

8.6

7.2

5.8

14.0

4.9

2.2

21.1

23.2

1.0

024,
030

22.4

25.6

46.5

2.1

10.0

13.9

16.9

7.8

3/4

1/2

5.26

13.13

3.6

6.1

8.6

7.2

5.8

14.0

4.9

2.2

21.1

27.2

1.0

036

25.4

30.6

50.5

3.4

10.8

15.6

18.9

7.8

3/4

1/2

5.96

13.13

3.6

6.1

8.6

6.4

6.3

18.0

5.3

2.2

26.1

27.2

1.0

042,
048

25.4

30.6

54.5

3.4

10.8

15.6

18.9

7.8

1/2

5.96

13.13

3.6

6.1

8.6

6.4

6.3

18.0

5.3

2.2

26.1

31.2

1.0

060,
070

25.4

30.6

58.5

3.4

10.8

15.6

18.9

7.8

1/2

5.96

13.13

3.6

6.1

8.6

6.4

6.3

18.0

5.3

2.2

26.1

35.2

1.0

Loop
In D

NOTES:
1.
Condensate
is s/4-in. FPT copper and is switchable
from side to front.
2.
Vertical unit shipped with filter bracket only, extending from unit 2.5-in.
This bracket should be removed for return duct connection.
3.
4.

Discharge
flange field installed.
Shaded areas are recommended

service

areas,

Loop
Low
Out E Voltage

LEGEND

PSC BLOWER AIRFLOW
CONFIGURATION

ASP
BSP
CAP

----

Alternate Service Panel
Blower Service Panel
Control Access Panel

FPT
CSP
HWG
HWR
LH
RH

-------

Female
Pipe Service
Thread Panel
Compressor
Hot
Water Generator
Hot Water Reheat
Left Hand
Right Hand

CODE

L
R

RETURN

DISCHARGE

not required.

Leftt
D_hn,V.

FieId Installed
Discharge
Flange

Top
7_,_i.,

Access

Panels

Filter Bracket

\
Air Coil--

B
-N-

--P-/

P
\

Air Coil

R - Configuration

Right

Return

- Top

Air Coil

/Top

Discharge

Left
Rtr
(right
Opposite

CSP

Side

L - Configuration

Side

Left

View

- Top

Return

/Top

Discharge

View

S
U_

C
3/4" IPT
Power

Supply

3/4"

ASP

Front

i
Right
- Air

Coil

- Right

Left

Return
Opening
Side

View

- Air

Return

Coil

- Left

Opening

Side

View

Fig. 3 -- 50PSV Dimensional Data

Front-View

OVERALL
CABINET
(in,)

50PSD
UNIT
SIZE

WATER
CONNECTIONS (in.) UNITS WITH
HWR

WATER CONNECTIONS
(in,)

A
Width

B
Depth

C
Height

D
In

E
Out

F
HWG
In

G
HWG
Out

H
Condensate

018

22.4

25.6

48.4

100

13.9

16.9

3.6

024,
030

22.4

25.6

52.5

2.1

10.0

13.9

16.9

3.6

036

25.4

30.6

54.5

3.4

10.8

15.6

18.9

3.6

042,
048

25.4

30.6

58.5

3.4

10.8

15.6

18.9

3.6

060,
070

25.4

30.6

62.5

3.4

10.8

15.6

18.9

3.6

Loop
Water
FPT

J
t&
Cond

HWG
FPT
Loop
In D

Low
Loop
Out E Voltage

3.
4.

RETURN
CONNECTION
(in.)
USING RETURN
AIR OPENING
(-+0.10 in.)

DISCHARGE CONNECTION
(in,)
DUCT FLANGE INSTALLED
(--.0.10 in.)

K
t&
Cond

L
3&
Cond

Ext
Pump

Power
Supply

M
(LH
rtrn)

O
Supply
Width

P
Supply
Depth

Q
(RH
rtrn)

S
Return
Depth

T
Return
Height

2.1

10.0

3.6

6.1

8.6

6.7

8.4

10.1

9.1

10.8

2.2

21.1

23.2

1.0

5.96

13.13

3.6

6.1

8.6

6.7

10.1

10.8

2.2

21.1

27.2

1.0

1/2

5.96

13.13

3.6

6.1

8.6

7.2

9.0

13.4

12.9

10.4

2.2

26.1

27.2

1.0

1/2

5.96

13.13

3.6

6.1

8.6

7.2

9.0

13.4

12.9

10.4

2.2

26.1

31.2

1.0

1/2

5.96

13.13

3.6

6.1

8.6

7.2

9.0

13.4

12.9

10.4

2.2

26.1

35.2

1.0

s/4

1/2

s/4

1/2

s/4

NOTES:
1.
2.

ELECTRICAL
KNOCKOUTS
(in.)

Condensate
is s/4-in. FPT copper and is switchable
from side to front.
Vertical unit shipped with filter bracket only, extending
from unit 2.5-in.
This bracket should be removed
for return duct connection.
Downflow
unit does not have discharge flange, and is rated for zero
clearance
installation.
Shaded areas are recommended
service areas, not required.

ASP
BSP
CAP
CSP
FPT
HWG
HWR
LH
RH

LEGEND
Alternate Service Panel
Blower Service Panel
Control Access Panel
Compressor Service Panel
Female Pipe Thread
Hot Water Generator
Hot Water Reheat
Left Hand
Right Hand

----------

PSC BLOWER AIRFLOW
CONFIGURATION
CODE

RETURN

DISCHARGE

L
R

Left
Right

Bottom
Bottom

CSP

ASP

_--N---_p_

o ;°we;
I

_--

Front

Optional
Service
Access
Right
Rtn
(left opposite)

Front

Opening

Q
I

Blower

M
Air Coil Side

2' Service
Access

Air Coil Side
B

Right Return / Bottom Discharge

Isometric

Left Return / Bottom Discharge
Power Supply 3/4" _

View

1.6

1,1--

1/2" Knockout
HV Knockout

/--

Low Voltage 1/2"
LV Knockout
--

ASP
i

CSP

CAP

CSP

I
Air Coil

zAirCoi,

Condensate
3/4" FPT RightReturn

Back

)nt

Front

Back

Right Return Right View Air Coil Opening

Left Return Left View Air Coil Opening

Fig. 4 -- 50PSD Dimensional

BSP ?
Condensate
3/4" FPT Left

(_)

Front-View

Data

Return

Supt

FIELD CONVERSION
OF DISCHARGE
AIR -- The discharge air of the 50PSH horizontal units can be converted
between side and back discharge in the field. The conversion
process is the same for fight and left return configurations. See
Fig. 7 and 8.

_Air

Building
Flexible
mnection

Loop_,

ou -iiii

NOTE: It is not possible to convert return air between left or
fight return models in the field due to refrigerant piping
changes.

Water_i
In

Stainless steel ii

Balancing

Valve

(fieldqnstalled

(field-installed

Water
Connection

accessory)

Remove

Screws

End

= Low Pressure
Drop Water
Control Valve
(optional)
(field-installed
accessory)

Wiring

Return Air

Ball Valve with optional
Compressor
Access Panel

NOTE:

Ball valve

with

integral

pressure

integral P/T plug
(typical for supply and
return piping) (field-Installed
accessory)

temperature

plug

Side Discharge
Water
Connection

recommended.

Fig. 5 -- Typical Vertical Installation -- 50PSV Unit
Flexible
Connection

r::::::::i

End

J----

Rotate

Building
Loc

Out

Valve
Move to Side

Low Pressure
• Drop Water
Control Valve
(optional)
(field-installed
accessory)

Pow_
Wiring
Compresso_
Access Panel

NOTE: Ball valve with integral pressure temperature

Step 3 -- Locate
should be considered

Downflow
50PSD Unit

Unit--The
when choosing

Installation

following

Back

Locate in areas where ambient temperatures are between
39 F and 102 F and relative humidity is no greater than
75%.

•

Provide sufficient
connections.

•

Locate unit in an area that allows easy access and removal
of filter and access panels.

electrical

personnel

Discharge

"Discharge

guidelines

and

Air

Water
Connection

.........

a location for a WSHP:

for water,

Drain

Fig. 7 -- Conversion Left Return,
Side Discharge to Back Discharge

Units are for indoor use only.

for service

/
/

plug recommended.

•

space

Screws

Return Air

•

space

Replace
End

Valve with
optional integral
P/T plug (typical for
supply and return
piping)(field-installed
accessory)

Flexible

Fig. 6 -- Typical

Water
Connection

End

Return Air

duct

•

Allow enough
maintenance.

•

Return air must be able to freely enter the space if unit needs
to be installed in a confined area such as a closet.

Side Discharge

------

to perform

NOTE: Correct placement of the horizontal unit can play an
important
part in minimizing
sound problems.
Since
ductwork is normally applied to these units, the unit can be
placed so that the principal sound emission is outside the occupied space in sound-critical applications. A fire damper
may be required by the local code if a fire wall is penetrated.

Water
Connection
/

Drain
\

Discharge Air

Back Discharge

Fig. 8 -- Conversion Right Return,
Side Discharge to Back Discharge

End

Preparation -- The unit should be on the ground m a well lit
area. Hung units should be taken down to ground level before
converting.
Side to Back Discharge Conversion
1. Remove screws to free the top and discharge panels. Set
screws aside for later use. See Fig. 7.
2. Remove the access panel and set aside.
3. Lift the discharge panel from side of unit and rotate it to
back using care not to damage blower wiring.
4. Check blower wire routing and connections for undue
tension or contact with sheet metal edges. Re-route if
necessary.
5. Check refrigerant tubing for contact with other components. Adjust if necessary.
6. Reinstall top panel using screws set aside in Step 1.
NOTE: Location for some screws at bottom of discharge
panel may have to be changed.
7. Manually spin fan wheel to check for obstructions.
Adjust for any obstruction found.
8. Replace access panel.
Back to Side Discharge Conversion -- Follow instructions
above for Side to Back Discharge Conversion, noting the
panels would be reversed.
Step 4 E Mount the Unit
HORIZONTAL UNIT (50PSH) -- Horizontal units should
be mounted using the factory-installed hangers. Proper attachment of hanging rods to building structure is critical for safety.
See Fig. 1. Rod attactunents must be able to support the weight
of the unit. See Table 1 for unit operating weights.
VERTICAL UNITS (50PSV, PSD) -- Vertical and downflow
units are available in left or right return air configurations. See
Fig. 3 and 4. Mount the unit (except 50PSD) on a vibration
absorption pad slightly larger than the entire base to minhnize
vibration transmission. It is not necessary to mount the unit on
the floor. See Fig. 9.
NOTE: Some codes require the use of a secondary drain pan
under vertical units. Check local codes for more information.

Step 5 E Check Duct System -- Size the duct system to handle the design airflow quietly.
NOTE: Depending on the unit, the fan wheel may have a shipping support installed at the factory. This must be removed
before operating unit.
SOUND ATTENUATIONTo eliminate the transfer of
vibration to the duct system, a flexible connector is recommended for both discharge and return air duct connections on
metal duct systems. The supply and return plenums should include internal duct liner of fiberglass or be made of duct board
construction to maximize sound attenuation of the blower.
Installing the WSHP unit to uninsulated ductwork in an unconditioned space is not recolmnended since it will sweat and
adversely affect the unit's performance.
To reduce air noise, at least one 90-degree elbow could be
included in the supply and return air ducts, provided system
performance is not adversely impacted. The blower speed can
also be changed in the field to reduce air noise or excessive airflow, provided system performance is not adversely impacted.
EXISTING DUCT SYSTEMIf the unit is connected to
existing ductwork, consider the following:
• Verify that the existing ducts have the proper capacity to
handle the unit airflow. If the ductwork is too small, install
larger ductwork.
• Check existing ductwork for leaks and repair as necessary.
NOTE: Local codes may require ventilation air to enter the
space for proper indoor air quality. Hard-duct ventilation
may be required for the ventilating air supply. If hard
ducted ventilation is not required, be sure that a proper air
path is provided for ventilation air to unit to meet ventilation requirement of the space.
Step 6 -- Install Condensate

Drain

HORIZONTAL UNIT (50PSH) -- Slope the unit toward the
drain at l/4 in. See Fig. 10. If it is not possible to meet the required pitch, install a condensate at the unit to pump condensate to buildmg dram.

Pitch Toward
Drain
...._-Drain

Connection

Fig. 10 -- Horizontal Unit Pitch
Return Air Louver or Grille
Fig. 9 -- 50PSV Units Mounted With
Vibration Absorption Pad

Horizontal units are not internally trapped, therefore an external trap is necessary. Install each unit with its own individual
trap and means to flush or blow out the condensate drain line.
Do not install units with a common trap or vent. See Fig. 11 for
typical condensate connections.
NOTE: Never use a pipe size smaller than the connection.

connection sizes. When making piping connections, consider
the following:
• Use a backup wrench when making screw connections to
unit to prevent internal damage to piping.
• Insulation may be required on piping to avoid condensation
in the case where fluid in loop piping operates at temperarares below dew point of adjacent air.
• Piping systems that contain steel pipes or fittings may be
subject to galvanic corrosion. Dielectric fittings may be
used to isolate the steel parts of the system to avoid galvanic
corrosion.

drain line)

Trap Depth

_1.5"

1.5" [38mm]
3/4" IPT

[38ram]

WATER LOOP APPLICATIONS -- Water loop applications
usually include a number of units plumbed to a colrnnon piping system. Maintenance to any of these units can introduce air
into the piping system. Therefore, air elimination equipment
comprises a maior portion of the mechanical room plumbing.
The flow rate is usually set between 2.25 and 3.5 gpm per
ton of cooling capacity. For proper maintenance and servicing,
pressure-temperature (P/T) ports are necessary for temperature
and flow verification.

____

ot__
3/4" PVC
Copper by others

1/4" per foot
(10mm per 46cm)
drain slope

NOTE: Trap should be deep enough to offset maximum unit static
difference. A 4-in. trap is recommended.

Fig. 11 -- Trap Condensate Drain Connection
VERTICAL UNITS (50PSV, PSD) -- Each unit uses a condensate hose inside all cabinets as a trapping loop, therefore an
external trap is not necessary. See Fig. 12.
Each unit must be installed with its own individual vent and
means to flush or blow out the condensate drain line. Do not install units with a colmnon trap or vent.
3/4" Copper FPT/PVC

Cooling tower/boiler systems typically utilize a colmnon
loop maintained at 60 to 95 F. The use of a closed circuit evaporative cooling tower with a secondary heat exchange between
the tower and the water loop is recolmnended. If an open type
cooling tower is used continuously, chemical treatment and filtering will be necessary.
In addition to complying with any applicable
er the following for system piping:

3/4" PVC

....
'........
I
Veot

1
Water
Connections

1/2"I.]

'/k,J/

I
|

!/2 ;'_

\" Alternate
Condensate
Location

Piping systems using water temperatures
below 50 F
require m/2-in,closed cell insulation on all piping surfaces to
eliminate condensation.

•

Avoid all plastic to metal threaded fittings due to the potential to leak. Use a flange fitted substitute.
Teflon tape thread sealant is recolmnended
to minimize
internal fouling of the heat exchanger.
Use backup wrench. Do not overtighten connections.
Route piping to avoid service access areas to unit.
Flush the piping system prior to operation to remove dirt
and foreign materials from the system.

•

•
•
•

GROUND-WATER
APPLICATIONS
-- Typical groundwater piping is shown in Fig. 13. In addition to complying
with any applicable
codes, consider the following for system piping:

NOTE: Unit does not need to be sloped toward drain.

Fig. 12 -- Vertical Condensate Connection

•
•

VENTINGInstall a vent in the condensate line of any
application that may allow dirt or air to collect in the line. Consider the following:
• Always install a vent where an application requires a long
horizontal run.
• Always install a vent where large units are working against
higher external static pressure and to allow proper drainage
for multiple units connected to the same condensate main.
• Be sure to support the line where anticipated sagging from
the condensate or when "double trapping" may occur.
• If condensate pump is present on unit, be sure drain connections have a check valve to prevent back flow of condensate
into other units.

Step 7 -- Pipe Connections

•
1/4" per foot

/ "\'-..._.-------_%)'-.

't-¢"q

codes, consid-

•
•
•
•

Install shut-off valves for servicing.
Install pressure-temperature
plugs to measure flow and
temperature.
Connect boiler drains and other valves using a "T" connector to allow acid flushing for the heat exchanger.
Do not overtighten connections.
Route piping to avoid service access areas to unit.
Use PVC SCH80 or copper piping material.

NOTE: PVC SCH40 should not be used due to system high
pressure and temperature extremes.
Water Supply and Quantity
-- Check water supply. Water
supply should be plentiful and of good quality. See Table 2 for
water quality guidelines.

Depending on the

IMPORTANT: Failure to comply with the above required
water quality and quantity limitations and the closedsystem application design requirements may cause damage
to the robe-in-robe heat exchanger. This damage is not the
responsibility of the manufacturer.

application, there are 3 types of WSHP piping systems to
choose from: water loop, ground-water and ground loop. Refer
to Piping Section of Carrier System Design Manual for additional information.

All WSHP units use low temperature soldered female pipe
thread fittings for water connections to prevent annealing and
out-of-round leak problems which are typically associated with
high temperature brazed connections. Refer to Table 1 for

Table 2 -- Water Quality Guidelines

Potential

Primary

Above the given limits, scaling
Hardness

is likely to occur. Scaling

Method

Limits

for Probable

Scaling indexes
implemented.

should

Ryznar Stability
Langelier

Scaling

be calculated

Index

Saturation

RECIRCULATING?
CLOSED

OPEN

LOOP AND

RECIRCULATING

WELL**

Measurement

0,,Oa,o,omI

Index

MATERIAL*
HX

CONDITION
Scaling

All
Situations

indexes

should

be calculated

N/A

(Operation

outside

these

limits

N/A

All

N/A

pH < 7.5 and Ca Hardness,

<100

ppm

is not recommended.)

at 150 F for direct use and HWG applications,

All

using the limits below.

and at 90 F for indirect

HX use. A monitoring

plan should

6.0 - 7.5
If >7.5 minimize steel pipe use.

Index

-0.5

to +0.5

If <-0.5 minimize steel pipe use.
Based upon 150 F HWG and direct well, 85 F indirect

well HX.

Iron Fouling
Iron Fe 2+ (Ferrous)
(Bacterial Iron Potential)

All

N/A

Iron Fouling

All

N/A

Corrosion

<0.2 ppm
If Fe 2+ (ferrous)

All

Hydrogen

Sulfide

6 - 8.5
Monitor/treat
as needed.

Minimize

Maximum

Chloride

N/A

with pH <8.

At H2S>0.2

ppm, avoid use of copper and cupronickel
piping of HXs.
Rotten egg smell appears at 0.5 ppm level.
alloy (bronze or brass) cast components
are okay to <0.5 ppm.
<0.5 ppm

All

N/A

Levels

Maximum allowable at maximum water temperature.
50 F (10 C)
75 F (24 C)
100 F (38 C)
<20 ppm
NR
NR
<150 ppm
NR
NR
<400 ppm
<250 ppm
<150 ppm
<1000 ppm
<550 ppm
<375 ppm
>1000 ppm
>550 ppm
>375 ppm

Copper
Cupronickel
304 SS
316 SS
Titanium

N/A
N/A
N/A
N/A
N/A

All

<10 ppm of particles and a
maximum velocity of 6 fps.
Filtered for maximum
800 micron size.

Size and Erosion

Brackish
All

Hot Water Generator
Heat Exchanger
Design Limits Not Applicable
Considering
Potable Water
Application
Not Recommended
Stainless Steel

<10 ppm (<1 ppm "sandfree" for reinjection)
of particles and a maximum
velocity of 6 fps. Filtered for maximum 800 micron size. Any particulate that
is not removed

can potentially

clog components.

Use cupronickel
heat exchanger when concentrations
of calcium or sodium
chloride are greater than 125 ppm are present. (Seawater is approximately
25,000 ppm.)

N/A

LEGEND

---

6 - 8.5
7 and no open tanks

and Clogging

Particulate

NR
SS

steel pipe below

<0.5 ppm

Copper
Ammonia Ion as Hydroxide,
Chloride, Nitrate and Sulfate
Compounds

----

for iron bacteria.

<0.5 ppm of Oxygen
Above this level deposition
will occur.

(H2S)
All

HWG
HX
N/A

ppm check

Preventiontt

Erosion

(Ferrous)

>0.2 ppm with pH 6 - 8, 02<5

ttlf

Recirculating

*Heat exchanger
materials considered
are copper, cupronickel,
304 SS
(stainless steel), 316 SS, titanium.
tCIosed recirculating
system is identified by a closed pressurized
piping
system.
**Recirculating
open wells should observe the open recirculating
design
considerations.

the concentration
of these corrosives
exceeds the maximum allowable level, then the potential for serious corrosion problems exists.
Sulfides in the water quickly oxidize when exposed to air, requiring that
no agitation occur as the sample is taken. Unless tested immediately
at the site, the sample will require stabilization
with a few drops of one
Molar zinc acetate solution, allowing accurate sulfide determination
up
to 24 hours after sampling. A low pH and high alkalinity cause system
problems, even when both values are within ranges shown. The term
pH refers to the acidity, basicity, or neutrality
of the water supply.
Below 7.0, the water is considered
to be acidic. Above 7.0, water is
considered
to be basic. Neutral water contains a pH of 7.0.
To convert ppm to grains per gallon, divide by 17. Hardness in mg/I is
equivalent to ppm.

In all applications,
the quality of the water circulated
through the heat exchanger must fall within the ranges listed in
the Water Quality Guidelines table. Consult a local water firm,
independent testing facility, or local water authority for specific
recolmnendations
to maintain water quality within the published limits.
GROUND-LOOP
APPLICATIONS
-tween 25 and 110 F and a cooling capacity
flow per ton is recommended.
In addition
any applicable codes, consider the following
•
•

Refer to Table 3. Do not exceed the minimum bend radius
for the hose selected. Exceeding the minimum bend radius may cause the hose to collapse, which reduces water
flow rate. Install an angle adapter to avoid sharp bends
in the hose when the radius falls below the required

lllinilllUlI1.

NOTE: Piping must comply with all applicable codes.

Temperatures
beof 2.25 to 3 gpm of
to complying with
for system piping:

Table 3 -- Metal Hose Minimum Bend Radii
HOSE DIAMETER

Limit piping materials to only polyethylene fusion in the
buried sections of the loop.
Do not use galvanized or steel fittings at any time due to
corrosion.

•

Avoid all plastic to metal threaded fittings due to the potential to leak. Use a flange fitted substitute.
• Do not overtighten connections.
• Route piping to avoid service access areas to unit.
• Use pressure-temperature
(P/T) plugs to measure flow of
pressure drop.
INSTALLATION
OF SUPPLY
AND RETURN
HOSE
KIT -- Follow these piping guidelines.

Install shutoff/balancing
valves and unions at each unit to
permit unit removal for servicing.

Place strainers
pump.

Select the proper hose length to allow slack between connection points. Hoses may vary m length by +2% to -4%
under pressure.

at the inlet of each system

51/2

Do not bend or kink supply lines or hoses.

NOTE: When anti-freeze is used m the loop, assure that it is
compatible with Teflon tape or pipe joint compound employed.
Maximum allowable torque for brass fittings is 30 ft-Ib. Ifa
torque wrench is not available, tighten finger-tight plus one
quarter turn. Tighten steel fittings as necessary.

Water

Flow

Control
Valve

Regulator
(field-installed

(field-installed

accessory)

\
;

.---_:__

\
_

Pressure

I
I

Tank

WaterOut
/...... .,,Jh_Water In

Shut-Off

IJ_P___ve
_

(field-installedaccessory)
_

]

Pipe joint compound is not necessary when Teflon threaded
tape is pre-applied to hose assemblies or when flared-end
connections are used. If pipe joint compound is preferred, use
compound only in small amounts on the male pipe threads of
the fitting adapters. Prevent sealant from reaching the flared
surfaces of the joint.

..__

21/2

3/4

IMPORTANT:

circulating

MINIMUM BEND RADII (in.)

Insulation is not required on loop water piping except where
the piping runs through unheated areas or outside the building
or when the loop water temperature is below the mimmum expected dew point of the pipe ambient. Insulation is required if
loop water temperature drops below the dew point.

1. Install a dram valve at the base of each supply and return
riser to facilitate system flushing.
2.

(in.)

1/2

Stra;_ield-installed

/
Boiler
Drains
(field-installed)

Fig. 13 -- Typical Ground-Water

accessory)

(16 to 20 meshrecommendedfor
filter sediment)

Piping Installation

Optional pressure-rated
hose assemblies designed specifically for use with Carrier units are available. Similar hoses can
be obtained from alternate suppliers. Supply and return hoses
are fitted with swivel-ioint fittings at one end to prevent kinking during installation.

SUPPLY VOLTAGEOperating voltage to unit must
within voltage range indicated on unit nameplate.

On 3-phase units, voltages under load between phases must
be balanced within 2%. Use the following formula to determine the percentage voltage hnbalance:
% Voltage hnbalance
= 100 x

Backup wrench is required when tightening water connections to prevent water line damage. Failure to use a backup
wrench could result in equipment damage.

max voltage deviation from average voltage
average voltage

Example:
A

Refer to Fig. 14 for an illustration of a supply/return hose
kit. Male adapters secure hose assemblies to the unit and risers.
Install hose assemblies properly and check them regularly to
avoid system failure and reduced service life.

Supply voltage is 460-3-60.
AN = 452 volts

AC = 455 volts
BC
= 464 Voltage
volts
Average
-

Step 8 E Wire Field Power Supply

452 + 464 + 455
3
1371
3

= 457

To avoid possible injury or death due to electrical shock,
open the power supply disconnect switch and secure it in
an open position during installation.

Determine

maximum

(AB) 457 - 452 = 5
(BC) 464 - 457 = 7
(AC) 457 - 455 = 2
Maximum deviation
Determine

Use only copper conductors for field-installed
electrical
wiring. Unit terminals are not designed to accept other
types of conductors. Failure to use copper conductors could
result in equipment damage.

deviation

from average voltage:

v
v
v
is 7 v.

percent voltage hnbalance.

% Voltage hnbalance

7
457

= 100 x
= 1.53%

All field-installed
wiring, including the electrical ground,
MUST comply with the National Electrical Code (NEC) as
well as applicable local codes. In addition, all field wiring must
conform to the Class II temperature limitations described in the
NEC.

This amount of phase imbalance is satisfactory as it is
below the maxflnum allowable 2%.
Operation on hnproper
line voltage or excessive phase
imbalance constitutes abuse and may cause damage to electrical components.

Refer to unit wiring diagrams Fig. 15-25 for a schematic of
the field connections, which must be made by the installing (or
electrical) contractor. Refer to Tables 4-6 for fuse sizes.

NOTE: If more than 2% voltage hnbalance
your local electric utility.

Consult the unit wiring diagram located on the inside of the
compressor access panel to ensure proper electrical hookup.
The installing (or electrical) contractor must make the field
connections when using field-supplied disconnect.
Operating voltage must be the same voltage
shown in electrical data shown in Tables 4-6.

208-VOLT OPERATIONAll 208-230 volt units are factory
wired for 208 volts. The transformers
may be switched to
230-volt operation by switching the red (208 volt) wire with
the orange (230 volt) wire at the L1 terminal.

and phase as

460-VOLT OPERATION-Units
using
460-v
and
an
ECM (electronically colmnutated motor) fan motor, modulating HWtL and/or internal secondary pump will require a
neutral wire from the supply side in order to feed accessory
with 265-v.

Make all final electrical connections with a length of flexible conduit to minimize vibration and sound transmission to
the building.
POWER CONNECTION
-- Make line voltage connection
by connecting the incoming line voltage wires to the line
side of the compressor
contactor
terminal
as shown in
Fig. 26. See Tables 4-6 for amperage ratings to provide correct wire and maximum overcurrent
protection sizing.

Swivel
Brass

Brass

Rib Crimped.
,_iitting

Fitting

Length
(2 ft Length

Standard)

MPT
Fig. 14-

is present, contact

Supply/Return

Hose Kit

SEE NOTE
EXTERNAL
HW

_
NO
_ROU:

T"[_
.....

PUMP

ASTAT

L--.
8LK

DTS

_0T

_ii

POWER

WAT

GENERATOR*

RED

SUPPLY

i_l
CONDUCIORS
.--I SEE
NOTE

ONLY
2 AND
8

SEE

SEE NOTE 9
SEE NO_Eb
TY_mAL

T_TAT

YEL

OR WRT

DRN

Y_
Y_--

__,
! IFCTRY

G!Y
SETTING

MED)

G(_-R_)--C_--

oO-- ;

REFER

DATA

POWER

×l(_-,
SEE

NOTE

FOR
ALARM

PLATE

SUPPLY

USE
COPPER
CONDUCTORS
ONLY.

SEE
NOTE 6
6

DRY
CONTACT

•.--_
CONTROL

BOX

........

LAYOUT

LEGEND

AL
ASTAT
BR
CB
CO
CO
COMPR
DTS
FP1
FP2
HP
HWG
JW
LOC
MV
NEC
PSC
P1
RVS

--------------------

Alarm Relay Contacts
Aquastat
Blower Relay
Circuit Breaker
Compressor Contactor
Condensate Overflow Sensor
Compressor
Discharge Temp Switch
Water Coil Freeze Protection Sensor
Air Coil Freeze Protection Sensor
High-Pressure Switch
Hot Water Generator
Jumper Wire
Loss of Charge Pressure Switch
Motorized Valve
National Electrical Code
Permanent Split Capacitor
Field Wiring Terminal Block
Reversing Valve Solenoid

TRANS
UPS

-- Transformer
Unit Performance Sentinel
Factory Low Voltage Wiring
Factory Line Voltage Wiring
Field Low Voltage Wiring
Field Line Voltage Wiring
Printed Circuit Trace
Optional Wiring

42>

*Optional.
NOTES:
1. Compressor and blower motor thermally protected internally.
2. All wiring to the unit must comply with NEC and local codes.
3. 208/230 v transformer will be connected for 208 v operation. For
230 v operation, disconnect RED lead at L1 and attach ORANGE
lead to L1. Insulate open end of RED lead. Transformer is energy
limiting or may have circuit breaker.
4. FP1 thermistor provides freeze protection for water. When using
antifreeze solutions, cut JW3 jumper.
5. Check installation wiring information for specific thermostat hookup.
Refer to thermostat installation instructions for wiring to the unit.
Thermostat wiring must be "Class 1" and voltage rating equal to or
greater than unit supply voltage.
6. 24-v alarm signal shown. For dry alarm contact, cut JWl jumper
and dry contact will be available between ALl and AL2.
7. Transformer secondary ground via Complete C board standoffs and
screws to control box. (Ground available from top two standoffs as
shown.)
8. Aquastat is supplied with unit and must be wired in series with the
hot leg to the pump. Aquastat is rated for voltage up to 277 v.
9. Fan motors factory wired for medium speed. For high and low speed
remove BLU wire from fan motor speed tap 'M' and connect to 'H'
for high or IZ for low.

Relay/Contactor

Solenoid Coil

O_ I,,,O
O_ _O

Relay Contacts

- N.C.

Relay Contacts

- N.O.

Capacitor
Temperature

O'_

Coil

O'_

Switch

Low Pressure Switch
High Pressure Switch

Thermistor
Wire Nut
Condensate

Pan

Circuit Breaker

_(_

COMPLETE
DESCRIPTION

C CONTROLLER

OF OPERATION

Normal Mode

Splice Cap
LED

FAULT CODES

LED

ALARM RELAY

ON
ON

Open
Cycle (Closed 5 Sec.
Open 25 Sec.)

Complete C is Non-Functional
Fault Retry
Lockout

OFF
Slow Flash
Fast Flash

Open
Open
Closed

Over/Under Voltage Shutdown

Slow Flash

Open
(Closed After 15 Min.)

Normal Mode with UPS Warning

Test Mode-No Fault in Memory
Test Mode-HP Fault in Memory

Flashing
Flashing

Code 1
Code 2

Cycling Code 1
Cycling Code 2

Test Mode-LP Fault in Memory
Test Mode-FP1 Fault in Memory

Flashing
Flashing

Code 3
Code 4

Cycling Code 3
Cycling Code 4

Test Mode-FP2 Fault in Memory
Test Mode-CO Fault in Memory

Flashing
Flashing

Code 5
Code 6

Cycling Code 5
Cycling Code 6

Test Mode-Over/Under
Shutdown
in Memory
Test Mode-UPS in Memory
Swapped FP1/FP2 Lockout

Flashing

Code 7

Cycling Code 7

Flashing
Flashing

Code 8
Code 9

Cycling Code 8
Cycling Code 9

Fig. 15 -- Units with Complete C Controller, Single-Phase

CTMF_ ?_f_'GF -- --

FA,_
za wc
C.._ON
.?.M
P.E_ETA%_

AL.g....

GRY
R_D
BRN
__YEL

SEE_OTE 6 _o_
DRYC_NT_CTOR ALARM

CONTROL

BOX

LAYOUT

LEGEND

AL
ASTAT
BM
BMC
BR
CB
CC
CO
COMPR
DTS
FP1
FP2
HP
HWG
JW
LOC
MV
NEC

-------------------

P1
RVS
TRANS

Alarm Relay Contacts
Aquastat
Blower Motor
Blower Motor Capacitor
Blower Relay
Circuit Breaker
Compressor Contactor
Condensate Overflow Sensor
Compressor
Discharge Temp Switch
Water Coil Freeze Protection Sensor
Air Coil Freeze Protection Sensor
High-Pressure Switch
Hot Water Generator
Jumper Wire
Loss of Charge Pressure Switch
Motorized Valve
National Electric Code

----

Field Wiring Terminal Block
Reversing Valve Solenoid
Transformer
Factory Low Voltage Wiring
Factory Line Voltage Wiring
Field Low Voltage Wiring
Field Line Voltage Wiring
Printed Circuit Trace
Optional Wiring

__L_

Ground

OJ_

Solenoid Coil
Relay Contacts - N.C.

O_ _

Relay Contacts - N.O.

O_ _-O

Capacitor
Temperature Switch

Relay/Contactor Coil
Thermistor

o.=r%.o

O'_

Low Pressure Switch

High Pressure Switch

Condensate Pan

Wire Nut

Circuit Breaker

Splice Cap

*Optional.
_O_
NOTES:
1. Compressor and blower motor thermally protected internally.
2. All wiring to the unit must comply with NEC and local codes.
3. Transformer is wired to 460 v (BLK/RED) lead for 460/60/3 units,
575 v (GRY) lead for 575/60/3. Transformer is energy limiting or may
have circuit breaker.
4. FP1 thermistor provides freeze protection for water. When using antifreeze solutions, cut JW3 jumper.
5. Check installation wiring information for specific thermostat hookup.
Refer to thermostat installation instructions for wiring to the unit.
Thermostat wiring must be "Class 1" and voltage rating equal to or
greater than unit supply voltage.
6. 24-v alarm signal shown. For dry alarm contact, cut JW4 jumper and
dry contact will be available between ALl and AL2.
7. Transformer secondary ground via Deluxe D board standoffs and
screws to control box. (Ground available from top two standoffs as
shown.)
8. Aquastat is supplied with unit and must be wired in series with the
hot leg to the pump. Aquastat is rated for voltage up to 277 v.
9. Blower motor is factory wired for high and low speeds. No other combination is available.
10. The 460-v units using an ECM (electronically commutated motor) fan
motor, modulating HWR, and/or an internal secondary pump will
require a neutral wire from the supply side in order to feed the accessory with 265-v.

TABLE 1
Blower
SDeeds

WIRE NUMBER
1

BM(H) to
BR2(6)
BM(H) to
BR2(6)
BM(H) to
BR2(3)

BM(R) to
BR2(3)
BM(R) to
BR2(3)
BM(R) to
BR2(3)

BM(M) to
BR2(7)

Not Used
BM(L) to
BR2(7)
BM(L) to
BR2(7)

BR2(6) to
BR2(4)
BR2(6) to
BR2(4)
BR2(2) to
aN2(4)

Factory
HI + MED
HI + LOW
MED + LOW

Not Used
BM(M) to
aN2(6)

DELUXE

D CONTROLLER

STATUS

OPERATION
Mode

Deluxe

D is Non-Functional

Emergency

Shut Down

Invalid Thermostat

Inputs

LED

FAULT LED

(YELLOW)
OFF
OFF

Note

Open

Code

Note

Flashing

Code

Note

Flashing

Code

Note

OFF

Open

OFF

Flashing

No Fault in Memory

ALARM
RELAY

(RED)
Note 2

OFF

Test Mode
Setback

FAULT CODES

TEST

(GREEN)
ON

Normal

Night

LED

Flashing

Cycle

(Note 3)

2
Code

Open

HP Fault/(Leckeut)

Note 1

Slow Flash/
(Fast Flash)

OFF

Flashing

Code

Open/(Closed)

LP Fault/(Leckout)

Note 1

Slow Flash/
(Fast Flash)

OFF

Flashing

Code

Open/(Closed)

OFF

Flashing

Code

Open/(Closed)

FP1 Fault/(Leckeut)

Note 1

Slow Flash/
(Fast Flash)

FP2 Fault/(Lockeut)

Note 1

Slow Flash/
(Fast Flash)

OFF

Flashing

Code

Open/(Closed)

Slow Flash/
(Fast Flash)

OFF

Flashing

Code

Open/(Closed)

Over-Under
Voltage
Normal Mode with UPS

Slow

OFF

Flashing

Code

Open

(Note 4)

OFF

Flashing

Code

Cycle

(Note 5)

Swapped

Fast Flash

OFF

Flashing

Code

CC Fault/(Leckout)

FP1/FP2

Note

Lockout

Flash

Closed

NOTES:
1. Status LED (GREEN)
Slow Flash - Controller
In - Fault Retry Mode. Fast Flash - Controller
in Lockout Mode. Slow Flash = 1 Flash per every 2 seconds.
Fast Flash = 2 Flashes per every 1 second.
2. Fault LED (RED) flashes a code representing
last fault in memory,
If no fault in memory
code 1 is
flashed.
3. Cycles appropriate
code, by cycling alarm relay in the same sequence
4. Alarm relay closes after 15 minutes.
5. Alarm relay cycles. Closed for 5 seconds and open for 25 seconds.

Fig. 16 -- Units with Deluxe D Controller, Three-Phase (460/575 V)
15

as fault LED.

I
I

CONTROL

BOX

LAYOUT

LEGEND
AL
ASTAT
BM
BR
CB
CO
CO
COMPR
DTS
ECM
FP1
FP2
HP
HWG
JW
LOC
LWT
MV
NEC
P1

---------------------

Alarm Relay Contacts
Aquastat
Blower Motor
Blower Relay
Circuit Breaker
Compressor Contactor
Condensate Overflow Sensor
Compressor
Discharge Temp Switch
Electronically Commutated Motor
Water Coil Freeze Protection Sensor
Air Coil Freeze Protection Sensor
High-Pressure Switch
Hot Water Generator
Jumper Wire
Loss of Charge Pressure Switch
Leaving Water Temperature
Motorized Valve
National Electric Code
Field Wiring Terminal Block

RVS
TRANS
UPS

----

• _

Reversing Valve Solenoid
Transformer
Unit Performance Sentinel
Factory Low Voltage Wiring
Factory Line Voltage Wiring
Field Low Voltage Wiring
Field Line Voltage Wiring
Printed Circuit Trace
Optional Wiring

OJ_

Solenoid Coil
Relay Contacts

- N.C.

0"=4 _

Relay Contacts

- N.O.

O_ _O

Capacitor
Temperature

Switch

Low Pressure Switch
o(_

Relay/Contactor

Coil
O'_

Thermistor
_

Condensate

O.=,'_=O

Pan

Circuit Breaker

__L_

High Pressure Switch

Wire Nut

Splice Cap

_(_

LED

Ground

*Optional.
NOTES:
1. Compressor and blower motor thermally protected internally.
2. All wiring to the unit must comply with NEC and local codes.
3. 208/230 v transformer will be connected for 208 v operation. For
230 v operation, disconnect RED lead at L1 and attach ORANGE
lead to L1. Insulate open end of RED lead. Transformer is energy
limiting or may have circuit breaker.
4. FP1 thermistor provides freeze protection for water. When using
antifreeze solutions, cut JW3 jumper.
5. Check installation wiring information for specific thermostat hookup.
Refer to thermostat installation instructions for wiring to the unit.
Thermostat wiring must be "Class 1" and voltage rating equal to or
greater than unit supply voltage.
6. 24-v alarm signal shown. For dry alarm contact, cut JW1 jumper
and dry contact will be available between ALl and AL2.
7. Transformer secondary ground via Complete C board standoffs and
screws to control box. (Ground available from top two standoffs as
shown.)
8. Aquastat is supplied with unit and must be wired in series with the
hot leg to the pump. Aquastat is rated for voltage up to 277 v.

COMPLETE
DESCRIPTION

C CONTROLLER

OF OPERATION

Normal Mode

FAULT CODES

LED

ALARM

RELAY

Open
Cycle (Closed 5 Sec.
Open 25 Sec.)

Complete C is Non-Functional
Fault Retry
Lockout

OFF
Slow Flash
Fast Flash

Open
Open
Closed

Over/Under Voltage Shutdown

Slow Flash

Open
(Closed After 15 Min.)

Normal Mode with UPS Warning

Test Mode-No Fault in Memory
Test Mode-HP Fault in Memory
Test Mode-LP Fault in Memory
Test Mode-FP1 Fault in Memory
Test Mode-FP2 Fault in Memory
Test Mode-CO Fault in Memory
Test Mode-Over/Under
Shutdown
in Memory

Flashing
Flashing
Flashing
Flashing
Flashing
Flashing

Flashing Code 7

Cycling Code 7

Test Mode-UPS in Memory
Swapped FP1/FP2 Lockout

Flashing Code 8
Flashing Code 9

Cycling Code 8
Cycling Code 9

Fig. 17 -- Units with Complete C ECM Blower, Three-Phase

Code
Code
Code
Code
Code
Code

1
2
3
4
5
6

(208/230 V)

Cycling
Cycling
Cycling
Cycling
Cycling
Cycling

Code
Code
Code
Code
Code
Code

1
2
3
4
5
6

eROU._

LQi

ii' o

LO_WOR_S rROTOCOk

LEGEND
AL
ASTAT
BM
BMC
BR
CB
CC
CO
DTS
ECM
FP1
FP2
HP
HPWS

---------------

Alarm Relay Contacts
Aquastat
Blower Motor
Blower Motor Capacitor
Blower Relay
Circuit Breaker
Compressor Contactor
Sensor, Condensate Overflow
Discharge Temperature Switch
Electronically Commutated Motor
Sensor, Water Coil Freeze Protection
Sensor, Air Coil Freeze Protection
High-Pressure Switch
High-Pressure Water Switch

HWG
-- Hot Water Generator
JWl
-- Clippable Field Selection Jumper
LOC
-- Loss of Charge Pressure Switch
LON
-- Local Operating Network
MV
-- Motorized Valve
MVES
-- Motorized Valve End Switch
*Optional Wiring.

NEC
P1
RVS
TRANS

-----

National Electrical Code
Field Wiring Terminal Block
Reversing Valve Solenoid
Transformer
Field Line Voltage Wiring

Relay Contacts - N.C.
o_ _

Field Low Voltage Wiring
Printed Circuit Trace
Optional Wiring
Relay/Contactor
Condensate
o..tV,o

Relay Contacts-

N.O.

Low Pressure Switch
High Pressure Switch
E:_

Coil

Wire Nut

o.--"_.-o

Splice Cap
Circuit Breaker

Pan

Solenoid Coil
Temperatu re Switch
Thermistor

Ground

NOTES:
1. Compressor and blower motor thermally protected internally.
2. All wiring to the unit must comply with NEC and local codes.
3. Transformer is wired to 460 v (BLK/RED) lead for 460/3/60
units. Transformer is energy limiting or may have circuit
breaker.
4. FP1 thermistor provides freeze protection for water. When
using antifreeze solutions, cut JW3 jumper.
5. Typical thermostat wiring shown. Refer to thermostat installation instructions for wiring to the unit. Thermostat wiring must
be Class 1 and voltage rating equal to or greater than unit supply voltage.
6. Factory cut JWl jumper. Dry contact will be available between
ALl and AL2.
7. Transformer secondary ground via Complete C board standoffs
and screws to control box. (Ground available from top two
standoffs as shown.)

9.
10.

11.
12.

13.

Fig 18 -- Units with ECM, Complete

Aquastat is supplied with unit and must be wired in series with
the hot leg to the pump. Aquastat is rated for voltages up to
277-v.
Optional LON wires. Only connect if LON connection is desired
at the wall sensor.
Fan motors are factory wired for medium speed. For high or low
speed, remove BLU wire from fan motor speed tap "M" and
connect to "H" for high speed or '1" for low speed.
For low speed, remove BLK wire from BR "6" and replace with
RED. Connect BLK and BRN wires together.
For blower motors with leads. For medium or low speed,
disconnect BLK wire from BR "6". Connect BLK and ORG/PUR
wire together. Connect RED for low or BLU for medium to
BR "6".
The 460-v units using an ECM (electronically commutated
motor) fan motor, modulating HWR (hot water reheat), and/or
an internal secondary pump will require a neutral wire from the
supply side in order to feed the accessory with 265-v.

C and LON Controller

(460 V)

LEGEND
AL
-- Alarm Relay Contacts
ASTAT
-- Aquastat
BM
-- Blower Motor
BMC
-- Blower Motor Capacitor
BR
-- Blower Relay
CB
-- Circuit Breaker
CC
-- Compressor Contactor
CO
-- Sensor, Condensate Overflow
DTS
-- Discharge Temperature Switch
ECM
-- Electronically Commutated Motor
FP1
-- Sensor, Water Coil Freeze Protection
FP2
-- Sensor, Air Coil Freeze Protection
HP
-- High-Pressure Switch
HPWS
-- High-Pressure Water Switch
HWG
-- Hot Water Generator
JWl
-- Clippable Field Selection Jumper
LOC
-- Loss of Charge Pressure Switch
LON
-- Local Operating Network
MV
-- Motorized Valve
NEC
-- National Electrical Code
*Optional Wiring.

P1
RVS
TRANS

----

Field Wiring Terminal Block
Reversing Valve Solenoid
Transformer
Field Line Voltage Wiring

-- • --

Relay Contacts - N.C.
o_ _:_

Relay Contacts - N.O.

Field Low Voltage Wiring
Printed Circuit Trace

Low Pressure Switch

Optional Wiring

High Pressure Switch

Relay/Contactor

Splice Cap

Coil
o-'%-o

I___1
Lz.zJ
o..zV,o

Wire Nut

Condensate

Circuit Breaker

Pan

Solenoid Coil
Temperature Switch

_,_,=
_L
---

Thermistor
Ground

NOTES:
1. Compressor and blower motor thermally protected internally.
2. All wiring to the unit must comply with NEC and local codes.
3. Transformer is wired to 460 v (BLK/RED) lead for 460/3/60
units. Transformer is energy limiting or may have circuit
breaker.
4. FP1 thermistor provides freeze protection for water. When
using antifreeze solutions, cut JW3 jumper.
5. Typical thermostat wiring shown. Refer to thermostat installation instructions for wiring to the unit. Thermostat wiring must
be Class 1 and voltage rating equal to or greater than unit supply voltage.
6. Factory cut JWl jumper. Dry contact will be available between
ALl and AL2.
7. Transformer secondary ground via Deluxe D board standoffs
and screws to control box. (Ground available from top two
standoffs as shown.)

10.
11.
12.

Aquastat is supplied with unit and must be wired in series with
the hot leg to the pump. Aquastat is rated for voltages up to
277-v.
Blower motor is factory wired for medium and high speeds. For
any other combination of speeds, at the motor attach the BLK
wire to the higher of the two desired speed taps and the BLU
wire to the lower of the two desired speed taps.
Optional LON wires. Only connect if LON connection is desired
at the wall sensor.
Blower motor is factory wired for high and low speeds. No other
combination is available.
The 460-v units using an ECM (electronically commutated
motor) fan motor, modulating HWR (hot water reheat), and/or
an internal secondary pump will require a neutral wire from the
supply side in order to feed the accessory with 265-v.

Fig 19 -- Units with ECM, Deluxe D and LON Controller (460 V)

.q,I
i_;_:_%_7a_

¢:

......
1/ L

i ...........
o_o0o,po0

14:,

iii

LEGEND

AL
ASTAT
BM
BR
CB

------

Alarm Relay Contacts
Aquastat
Blower Motor
Blower Relay
Circuit Breaker

RVS
SAT
TRANS
UPS

-----

CO
CO
OR
DTS
ECM
FP1
FP2
HP

---------

Compressor Contactor
Sensor, Condensate Overflow
Cooling Relay
Discharge Temp Switch
Electronically Commuted Motor
Sensor, Water Coil Freeze Protection
Sensor, Air Coil Freeze Protection
High Pressure Switch

HPWS
HWG
JW
LOC

-----

High
Pressure
Water Switch
Hot Water
Generator
Jumper Wire
Loss of Charge Pressure Switch

_
I---I
L=7=7.J

Condensate

LWT
MV

---

Leaving
MotorizedWater
ValveTemperature

Solenoid Coil

MVES
P1

---

Motorized Valve End Switch
Field Wiring Terminal Block

Temperature

*Optional

Wiring.

Reversing Valve Solenoid
Saturated Air Temperature
Transformer
Unit Performance Sentinel
Field Line Voltage Wiring

O_
i
[_

NOTES:
1. Compressor and blower motor thermally protected internally.
2. All wiring to the unit must comply with NEC and local codes.
3. 208-240 60 Hz units are wired for 208v operation. Transformer is energy
limiting or may have circuit breaker.
4. FP1 thermistor provides low temperature
protection for water. When
using antifreeze solutions, cut JW3 jumper.
5. Refer to multiple protocol controller (MPC), LON, or TSTAT Installation,
Application, and Operation Manual for control wiring to the wire from
PremierLink controller to "Y" Complete C when motorized valve is not
used. Thermostat wiring must be "Class 1" and voltage rating equal to or
greater than unit supply voltage.
6. 24v alarm signal shown. For dry contact, cut JW1 jumper and dry contact will be available between ALl and AL2.
7. Transformer secondary ground via green wire with yellow stripe from "C"
terminal to control box.
8. Aquastat is supplied with unit and must be wired in series with the hot
leg to the pump. Aquastat is rated for voltages up to 277v.

Wire Nut

Field Low Voltage Wiring

Relay Contacts - N.C.

Field Line Voltage Wiring
Field Low Voltage Wiring
....

Thermistor
Ground

O._ _O

Printed Circuit Trace
Optional Wiring
Relay/Contactor

Low Pressure Switch
°_

Coil

Mode

Normal

Mode

Complete

UPS Warning

C is Non-Functional

Fault Retry
Lockout
Over/Under

Circuit Breaker

O_ (-,O

Capacitor

_(_)_

OF OPERATION

with

Voltage

Splice Cap

O_"%'O

Switch

COMPLETE

Normal

High Pressure Switch

Pan

DESCRIPTION

Relay Contacts - N.O.

Shutdown

C CONTROLLER

LED

FAULT CODES

LED

ALARM

RELAY

Open

Cycle (Closed 5 Sec.
Open 25 Sec.)

OFF

Open

Slow Flash
Fast Flash

Open
Closed
(Closed

After

Test Mode-No

Fault in Memory

Flashing

Slow

Flash
Code

Open

Cycling

Code

15 Min.)
1

Test Mode-HP

Fault in Memory

Flashing

Code

Cycling

Code

Test Mode-LP

Fault in Memory

Flashing

Code

Cycling

Code

Test Mode-FP1

Fault in Memory

Flashing

Code

Cycling

Code

Test Mode-FP2

Fault in Memory

Flashing

Code

Cycling

Code

Test Mode-CO
Fault in Memory
Test Mode-Over/Under
Shutdown
in Memory

Flashing

Code

Cycling

Code

Flashing

Code

Cycling

Code

Test Mode-UPS

Flashing

Code

Cycling

Code

Flashing

Code

Cycling

Code

Swapped

Fig. 20 -- Units with Complete C and Premierlink

in Memory

FP1/FP2

Lockout

Controller, Single-Phase (208/230 V)

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To WSHP Controller

Table 4 -- 50PSH, PSV, PSD Electrical Data -- PSC Motor
COMPRESSOR

UNITS WITH PSC MOTOR AND HWR

50PS
UNIT
SIZE

RATED
VOLTAGE
V-Ph-Hz

VOLTAGE
MIN/MAX

RLA

LRA

Qty

FAN
MOTOR
FLA

006

208/230-1-60

197/254

3.1

17.7

0.4

3.5

009

208/230-1-60

197/254

3.9

21.0

0.4

4.3

012

208/230-1-60

197/254

5.0

25.0

0.4

018

208/230-1-60
265-1-60

197/254
239/292

9.0
8.4

48.0
40.0

1
1

024

208/230-1-60
208/230-3-60
460-3-60

197/254
197/254
414/506

12.8
8.0
4.0

60.0
55.0
22.4

030

208/230-1-60
265-1-60
208/230-3-60
460-3-60

197/254
239/292
197/254
414/506

13.5
10.9
8.3
4.5

036

208/230-1-60
265-1-60
208/230-3-60
460-3-60

197/254
239/292
197/254
414/506

042

208/230-1-60
208/230-3-60
460-3-60
575-3-60

048

TOTAL
UNIT
FLA

MAX
FUSE/
HACR

REHEAT
PUMP
FLA

4.3

0.43

3.9

4.7

5.3

0.43

4.8

5.7

7.0

0.43

6.1

7.4

1.0
0.9

10.0
9.3

12.3
11.4

20
15

0.43
N/A

10.4
N/A

12.7
N/A

20
N/A

1
1
1

1.1
1.1
0.6

13.9
9.1
4.6

17.1
11.1
5.6

25
15
15

0.43
0.43
N/A

14.3
9.5
N/A

17.5
11.5
N/A

30
15
N/A

61.0
58.0
63.0
27.0

1
1
1
1

1.4
1.6
1.4
0.9

14.9
12.5
9.7
5.4

18.3
15.2
11.8
6.5

30
25
20
15

0.80
0.70
0.80
0.70

15.7
13.2
10.5
6.1

19.1
15.9
12.6
7.2

30
25
20
15

14.7
12.5
10.4
4.5

72.5
61.0
63.0
32.0

1
1
1
1

2.1
2.2
2.1
1.3

16.8
14.7
12.5
5.8

20.5
17.8
15.1
6.9

35
30
25
15

0.80
0.70
0.80
0.70

17.6
15.4
13.3
6.5

21.3
18.5
15.9
7.6

35
30
25
15

197/254
197/254
414/506
518/633

15.4
11.5
5.1
4.3

83.0
77.0
35.0
31.0

1
1
1
1

2.1
2.1
1.0
0.8

17.5
13.6
6.1
5.1

21.4
16.5
7.4
6.2

35
25
15
15

0.80
0.80
0.70
N/A

18.3
14.4
6.8
N/A

22.2
17.3
8.1
N/A

35
25
15
N/A

208/230-1-60
208/230-3-60
460-3-60
575-3-60

197/254
197/254
414/506
518/633

20.5
14.6
7.1
5.1

109.0
91.0
46.0
34.1

1
1
1
1

3.0
3.0
1.7
1.4

23.5
17.6
8.8
6.5

28.6
21.3
10.6
7.8

45
35
15
15

0.80
0.80
0.70
N/A

24.3
18.4
9.5
N/A

29.4
22.1
11.3
N/A

45
35
15
N/A

060

208/230-1-60
208/230-3-60
460-3-60
575-3-60

197/254
197/254
414/506
518/633

26.9
17.6
9.6
6.1

145.0
123.0
64.0
40.0

1
1
1
1

4.9
4.9
2.5
1.9

31.8
22.5
12.1
8.0

38.5
26.9
14.5
9.5

60
40
20
15

1.07
1.07
1.07
N/A

32.9
23.6
13.2
N/A

39.6
28.0
15.6
N/A

60
45
25
N/A

070

208/230-1-60
208/230-3-60
460-3-60
575-3-60

197/254
197/254
414/506
518/633

30.1
20.5
9.6
7.6

158.0
155.0
75.0
54.0

1
1
1
1

5.8
5.8
2.6
2.3

35.9
26.3
12.2
9.9

43.4
31.4
14.6
11.8

70
50
20
15

1.07
1.07
1.07
N/A

37.0
27.4
13.3
N/A

44.5
32.5
15.7
N/A

70
50
25
N/A

LEGEND
FLA
HACR
HWR
LRA
RLA

------

MIN
CIRCUIT
AMP

TOTAL
UNIT
FLA

MIN
CIRCUIT
AMP

MAX
FUSE /
HACR

NOTE: Unit sizes 006-012 are not available on 50PSD units.

Full Load Amps
Heating, Air Conditioning
Hot Water Reheat
Locked Rotor Amps
Rated Load Amps

and Refrigeration

Table 5 -- 50PSH, PSV, PSD Electrical Data -- PSC High-Static Motor
UNITS WITH HIGH-STATIC

COMPRESSOR
50PS
UNIT
SIZE

RATED
VOLTAGE
V-Ph-Hz

VOLTAGE
MIN/MAX
RLA

LRA

Qty

FAN
MOTOR
FLA

TOTAL
UNIT
FLA

MIN
CIRCUIT
AMP

MAX
FUSE/
HACR

REHEAT
PUMP
FLA

PSC MOTOR

AND HWR
TOTAL
MIN
UNIT
CIRCUIT
FLA
AMP

MAX
FUSE /
HACR

018

208/230-1-60
265-1-60

197/254
239/292

9.0
8.4

48.0
40.0

1
1

1.10
0.90

7.9
7.1

12.4
11.4

20
15

0.80
0.70

10.9
10.0

13.2
12.1

20
20

024

208/230-1-60
208/230-3-60
460-3-60

197/254
197/254
414/506

12.8
8.0
4.0

60.0
55.0
22.4

1
1
1

1.40
1.40
0.90

14.2
9.4
4.9

17.4
11.4
5.9

30
15
15

0.80
0.80
0.70

15.0
10.2
5.6

18.2
12.2
6.6

30
20
15

030

208/230-1-60
265-1-60
208/230-3-60
460-3-60

197/254
239/292
197/254
414/506

13.5
10.9
8.3
4.5

61.0
58.0
63.0
27.0

1
1
1
1

1.80
2.00
1.80
1.24

15.3
12.9
10.1
5.7

18.7
15.6
12.2
6.9

30
25
20
15

0.80
0.70
0.80
0.70

16.1
13.6
10.9
6.4

19.5
16.3
13.0
7.6

30
25
20
15

036

208/230-1-60
265-1-60
208/230-3-60
460-3-60

197/254
239/292
197/254
414/506

14.7
12.5
10.4
4.5

72.5
61.0
63.0
32.0

1
1
1
1

2.00
1.66
2.00
1.00

16.7
14.2
12.4
5.5

20.4
17.3
15.0
6.6

35
25
25
15

0.80
0.70
0.80
0.70

17.5
14.9
13.2
6.2

21.2
18.0
15.8
7.3

35
30
25
15

042

208/230-1-60
208/230-3-60
460-3-60
575-3-60

197/254
197/254
414/506
518/633

15.4
11.5
5.1
4.3

83.0
77.0
35.0
31.0

1
1
1
1

3.00
3.00
1.70
1.40

18.4
14.5
6.8
5.7

22.3
17.4
8.1
6.8

35
25
15
15

0.80
0.80
0.70
N/A

19.2
15.3
7.5
N/A

23.1
18.2
8.8
N/A

35
25
15
N/A

048

208/230-1-60
208/230-3-60
460-3-60
575-3-60

197/254
197/254
414/506
518/633

20.5
14.6
7.1
5.1

109.0
91.0
46.0
34.1

1
1
1
1

3.40
3.40
1.80
1.40

23.9
18.0
8.9
6.5

29.0
21.7
10.7
7.8

45
35
15
15

1.07
1.07
1.07
N/A

25.0
19.1
10.0
N/A

30.1
22.7
11.7
N/A

50
35
15
N/A

060

208/230-1-60
208/230-3-60
460-3-60
575-3-60

197/254
197/254
414/506
518/633

26.9
17.6
9.6
6.1

145.0
123.0
64.0
40.0

1
1
1
1

5.80
5.80
2.60
2.30

32.7
23.4
12.2
8.4

39.4
27.8
14.6
9.9

60
45
20
15

1.07
1.07
1.07
N/A

33.8
24.5
13.3
N/A

40.5
28.9
15.7
N/A

60
45
25
N/A

LEGEND
FLA
HACR
HWR
LRA
RLA

------

Full Load Amps
Heating, Air Conditioning
Hot Water Reheat
Locked Rotor Amps
Rated Load Amps

NOTE: Unit sizes 006-012 are not available with PSC high-static
and Refrigeration

motors.

Table 6 -- 50PSH, PSV, PSD Electrical Data, ECM Motor
50PS
UNIT
SIZE

RATED
VOLTAGE
V-Ph-Hz

COMPRESSOR
VOLTAGE
MINIMAX

RLA

LRA

Qty

FAN
MOTOR
FLA

TOTAL
UNIT
FLA

MIN
CIRCUIT
AMP

MAX
FUSE/
HACR

UNITS WITH ECM MOTOR AND HWR
REHEAT
PUMP
FLA

TOTAL
UNIT
FLA

MIN
CIRCUIT
AMP

MAX
FUSE /
HACR

018

208/230-1-60
265-1-60

197/254
239/292

9.0
8.4

48.0
40.0

1
1

4.3
4.1

13.3
12.5

15.6
14.6

20
20

0.8
0.7

14.1
13.2

16.4
15.3

25
20

O24

208/230-1-60
208/230-3-60
460-3-60

197/254
197/254
414/506

12.8
8.0
4.0

60.0
55.0
22.4

1
1
1

4.3
4.3
4.1

17.1
12.3
8.1

20.3
14.3
9.1

30
20
15

0.8
0.8
0.7

17.9
13.1
8.8

21.1
15.1
9.8

30
20
15

030

208/230-1-60
265-1-60
208/230-3-60
460-3-60

197/254
239/292
197/254
414/506

13.5
10.9
8.3
4.5

61.0
58.0
63.0
27.0

1
1
1
1

4.3
4.1
4.3
4.1

17.8
15.0
12.6
8.6

21.2
17.7
14.7
9.7

30
25
20
15

0.8
0.7
0.8
0.7

18.6
15.7
13.4
9.3

22.0
18.4
15.5
10.4

35
25
20
15

036

208/230-1-60
265-1-60
208/230-3-60
460-3-60

197/254
239/292
197/254
414/506

14.7
12.5
10.4
4.5

72.5
61.0
63.0
32.0

1
1
1
1

4.3
4.1
4.3
4.1

19.0
16.6
14.7
8.6

22.7
19.7
17.3
9.7

35
30
25
15

0.8
0.7
0.8
0.7

19.8
17.3
15.5
9.3

23.5
20.4
18.1
10.4

35
30
25
15

O42

208/230-1-60
208/230-3-60
460-3-60

197/254
197/254
414/506

15.4
11.5
5.1

83.0
77.0
35.0

1
1
1

4.3
4.3
4.1

19.7
15.8
9.2

23.6
18.7
10.5

35
30
15

0.8
0.8
0.7

20.5
16.6
9.9

24.4
19.5
11.2

35
30
15

048

208/230-1-60
208/230-3-60
460-3-60

197/254
197/254
414/506

20.5
14.6
7.1

109.0
91.0
46.0

1
1
1

7.0
7.0
6.9

27.5
21.6
14.0

32.6
25.3
15.8

50
35
20

1.07
1.07
1.07

28.6
22.7
15.1

33.7
26.3
16.8

50
40
20

060

208/230-1-60
208/230-3-60
460-3-60

197/254
197/254
414/506

26.9
17.6
9.6

145.0
123.0
64.0

1
1
1

7.0
7.0
6.9

33.9
24.6
16.5

40.6
29.0
18.9

60
45
25

1.07
1.07
1.07

35.0
25.7
17.6

41.7
30.1
20.0

60
45
25

070

208/230-1-60
208/230-3-60
460-3-60

197/254
197/254
414/506

30.1
20.5
9.6

158.0
155.0
75.0

1
1
1

7.0
7.0
6.9

37.1
27.5
16.5

44.6
32.6
18.9

70
50
25

1.07
1.07
1.07

38.2
28.6
17.6

45.7
33.7
20.0

70
50
25

LEGEND
FLA
HACR
HWR
LRA
RLA

------

Full Load Amps
Heating, Air Conditioning
Hot Water Reheat
Locked Rotor Amps
Rated Load Amps

NOTES:
1. The 460-v units using an ECM (electronically commutated motor) fan
motor, modulating HWR, and/or an internal secondary pump will require
a neutral wire from the supply side in order to feed the accessory with
265-v.
2. Unit sizes 006-012 are not available with ECM motors.

and Refrigeration

COMPRESSOR

CAPACITOR

CONTACTOR

COMPLETE

C CONTROL

TRANSFORMER

ECM CONTROL
BOARD

Fig. 26 -- 50PSH,PSV, PSD Typical Single-Phase

Line Voltage Power Connection

WATER SOLENOID
VALVES -- An
external
solenoid
valve(s) should be used on ground water installations to shut
off flow to the unit when the compressor is not operating. A
slow closing valve may be required to help reduce water
halrnner. Figure 29 shows typical wiring for a 24-vac external
solenoid valve. Figures 30 and 31 illustrate typical slow closing
water control valve wiring for Taco 500 Series and Taco ESP
Series valves. Slow closing valves take approximately 60 sec.
to open (very little water will flow before 45 sec.). Once fully
open, an end switch allows the compressor to be energized
(only on valves with end switches). Only relay or triac based
electronic thermostats should be used with slow closing valves.
When wired as shown, the slow closing valve will operate
properly with the following notations:

Step 9 -- Wire Field Controls
THERMOSTAT
CONNECTIONS
-- The thermostat should
be wired directly to the ECM control board. See Fig. 27.
WATER FREEZE PROTECTION-The Aquazone TM control allows the field selection of source fluid freeze protection
points through jumpers. The factory setting of jumper JW3
(FP1) is set for water at 30 E In earth loop applications, jumper
JW3 should be clipped to change the setting to 10 F when using antifreeze in colder earth loop applications. See Fig. 28.
NOTE:
The extended
range option should be
with water temperatures
below 60 F to prevent
condensation.

selected
internal

AIR COIL FREEZE PROTECTION-The air coil freeze
protection jumper JW2 (FP2) is factory set for 30 F and should
not need adjusting.
ACCESSORY CONNECTIONS
-- Terminal A on the control
is provided to control accessory devices such as water valves,
electronic air cleaners, humidifiers,
etc. This signal operates
with the compressor terminal. See Fig. 29. Refer to the specific
unit wiring schematic for details.
NOTE: The A terminal should only
signals -- not line voltage signals.

1. The valve will remain open during a unit lockout.
2.

25 to 35 VA through

overheat the anticipators
of electromechanical
thermoIMPORTANT:
Connecting
a water thermostats.
solenoid valve can
stats.
Only use relay
based electronic

be used with 24-volt
CAPACITOR

COMPRESSOR

The valve will draw approximately
the "Y" signal of the thermostat.

COMPLETE

CONTACTOR

C CONTROL

TRANSFORMER

TBI

_A_
I0000000000

A_L

THERMOSTAT

CONNECTION

Fig. 27 -- Low Voltage Field Wiring
TERMINAL
eR BRe CCG

O
"=_

,o,,o
[]
J_

[------]

STRIP P2

_o_

CLIPJW3
FOR
FREEZE .....
PROTECT

IF_

Low

Te_

TYPICAL
WATER
VALVE

CLIP JW2-FP2
I JUMPER FOR
ANTI-FREEZE
SYSTEMS

Fig. 29 -- Typical Accessory Wiring

CLIP
FOR DRY CONTACT

o
AQUAZONE CONTROL (Complete C Shown)
Fig. 28 -- Typical Aquazone TM Control
Jumper
Locations

Board

I
]

For specific details about sensors, refer to the literature supplied with the sensor.
Wiring a SPT Sensor -- A WSHP Open controller is connected to a wall-mounted space temperature (SPT) sensor to monitor room temperature using a Molex plug.
The WSHP Open system offers the following SPT sensors.
See Table 8.

1 !3
TAo LvE
Table

SENSOR

.E° sTAT
Fig. 30 -- AMV Valve Wiring

8 -- SPT Sensors

PART
NUMBER

SPT
Standard

SPS

SPT Plus

SPPL

SPT Pro

SPT Pro
Plus

•
•
•
•

Slide potentiometer to adjust set point
Manual on button to override schedule
LED to show occupied status
Local access port

•
•
•
•

LCD display
Manual on button to override schedule
Warmer and cooler buttons to adjust set point
Info button to cycle through zone and outside
air temperatures, set points, and local override
time
• Local access port

SPP

•
•
•
•

SPPF

Fig. 31 -- Taco SBV Valve Wiring

*The SPT Pro Plus fan speed adjustment

WSHP OPEN WIRING -- The WSHP Open controller will
be factory mounted to the unit control panel and wired to the
Complete C or Deluxe D control board, however, the system
wiring will need to be completed utilizing WSHP Open controller wiring diagrams and the Third Party Integration (TPI)
Guide. Factory installation includes harness, LWT (leaving
water temperature), supply air, and condensate sensor.

•
•
•

1 SPT Plus, SPT Pro, or SPT Pro Plus sensor
1 to 4 SPT Standard sensors
1 to 4 SPT Standard sensors and 1 SPT Plus, SPT Pro, or
SPT Pro Plus sensor
Any of the above combinations,
plus up to 2 BACview 6
Handheld but no more than 6 total devices

NOTE: If the Rnetbus has multiple Sift Standard sensors, each
sensor must be given a unique address on the Rnetbus. See the
Carrier Open Sensor Installation Guide.
Use the specified type of wire and cable for lnaxhnum signal
integrity. See Table 9.

unit before performing mainteautomatically start if power is
to follow this warning could
and/or equipment damage.

Wiring Sensors to Inputs -- Sensors can be wired
WSHP Open controller's inputs. See Table 7.

to the

Table 9 -- Rnet Wiring Specifications

All field control wiring that connects to the WSHP Open controller must be routed through the raceway built into the corner
post. The raceway provides the UL required clearance between
high and low-voltage wiring.

RNET WIRING SPECIFICATIONS
Description

Feed the wires through
controller.

the raceway

Connect the wires to the removable

Reconnect

the connectors

Phoenix connectors.

to the board.
AWG
CMP
NEC
UL

Field Installed (Must be used with
WSHP Open controller.)

Indoor Air Quality Sensor
(Separate Sensor)

Required only for demand
control ventilation.

Space Relative
Humidity Sensor

Separate Sensor

NOTE: BACview s Handheld
interface.

BACview

32 to 167 F

Voltage

300-vac, power limited

Listing

UL: NEC CL2P, or better

-----

American Wire Gage
Communications
Plenum Cable
National Electrical Code
Underwriters Laboratories

1. Partially cut, then bend and pull off the outer .jacket of
the Rnet cable(s), being careful not to nick the inner
insulation.
2.

Network Sensor

or Virtual

UL Temperature

To wire the SPT sensor to the controller:

Table 7 -- Field-Supplied Sensors for
WSHP Open Controller
Space Temperature Sensor
(SPT)
Outdoor Air
Temperature Sensor

Coloring

500 ft
Jacket: white
Wiring: black, white, green, red

LEGEND

Field-Supplied
Sensor Hardware -- The WSHP Open controller is configurable with the following field-supplied
sensors. See Table 7.

NOTES

Length

Recommended

to the WSHP Open

SENSOR

4 conductor, unshielded, CMP,
plenum rated cable
18 AWG

Conductor
Maximum

1. Pass control wires through hole provided in corner post.
2.

has no effect in this application.

Wire Sift sensors to the WSHP Open controller's Rnet port.
An Rnetbus can consist of any of the following combinations
of devices wired in a daisy-chain configuration:

•
Disconnect all power to the
nance or service. Unit may
not disconnected.
Failure
cause personal injury, death,

FEATURES

• Local access port
• No operator control

can be used as the user

Strip about
See Fig. 32.

l/4

in. of the inner insulation

from each wire.

Gage) cable should be used. If the cable will be greater than
100 ft, a shield 22 AWG cable should be used. The cable
should have a maximum length of 500 ft.
To wire the RH sensor to the controller:

JACKET

/OUTER

[TJ
.25IN.

1. Strip the outer jacket from the cable for at least 4 in.

INNER INSULATION

2.
3.

Fig. 32 -- Rnet Cable Wire
3.

Step

Wire each terminal on the sensor to the same terminal on
the controller. See Fig. 15-25. Table 10 shows the recommended Rnet wiring scheme.

Operate

ECM

Interface

Board

TERMINAL

Red

+12-v

Black

.Rnet-

White

1/4" SPADE
CONNECTIONS
TO COMPLETE
C OR
DELUXE D BOARD

Rnet+

Green
NOTE: The wire should be connected

10 --

The ECM fan is controlled by an interface board that converts
thermostat inputs and field selectable cfm settings to signals
used by the ECM (electronically
COlrUnutated motor)
controller. See Fig. 33.

Table 10 -- Rnet Wiring
WIRE

Strip 1/4in. of insulation from eachwire.
Wire the sensor to the controller.

THERMOSTAT
INPUT LEDS

CFM COUNTER
1FLASH
PERIOOCFM

Gnd

to the terminal shown.
-<

Wiring a Supply Air Temperature
(SAT) Sensor
-The
SAT sensor is required for reheat applications.
If the cable used to wire the SAT sensor to the controller
will be less than 100 ft, an unshielded 22 AWG (American
Wire Gage) cable should be used. If the cable will be greater
than 100 ft, a shield 22 AWG cable should be used. The cable
should have a maximum length of 500 ft.
To wire the SAT sensor to the controller:

THERMOSTAT
CONNECTIONS
\

ECM MOTOR
_-

cococo cococococo co
DEHUMIDIFICATIO_
LED

1. Wire the sensor to the controller. See Fig. 15-25.
2. Verify that the Enable SAT jumper is on.
3. Verify that the Enable SAT and Remote jumper is in the
left position.
Wiring an Indoor Air Quality (IAQ) Sensor -- An IAQ
sensor monitors CO2 levels. The WSHP Open controller uses
this information to adjust the outside-air dalnpers to provide
proper ventilation. An IAQ sensor can be wall-mounted or
mounted in a return air duct. (Duct installation requires an aspirator box assembly.)
The sensor has a range of 0 to 2000 ppm and a linear 4 to
20 mA output. This is converted to 1 to 5 vdc by a 250-ohin,
1/4watt, 2% tolerance resistor connected across the zone controller's IAQ input terminals.
NOTE: Do not use a relative humidity sensor and CO2 sensor
on the sane zone controller if both sensors are powered off the
board. If sensors are externally powered, both sensors may be
used on the same zone controller.

FAN SPEED

Verify the the RH!IAQ julnper is set to 0 to 5 vdc.

SELECTION

DIP

SWITCH

NOTE: Power must be offto the unit for at least three seconds
before the ECM will recognize a speed change. The motor will
recognize a change in the CFM Adjust or Dehumidification
mode settings while the unit is powered.
There are four different airflow settings from lowest airflow
rate (speed tap 1) to the highest airflow rate (speed tap 4).
Table 11 indicates settings for both versions of the ECM interface board, followed by detailed information for each setting.

When the disconnect switch is closed, high voltage is
present in some areas of the electrical panel. Exercise caution when working with energized equipment. Failure to
heed this safety precaution could lead to personal iniury.

To wire the IAQ sensor to the controller:

===_=I=_=

Fig. 33 -- ECM Interface Board Physical Layout

COOLING--The
cooling setting determines
the cooling
(normal) cfm for all units with ECM motor. Cooling (normal)
setting is used when the unit is not in Dehumidification
mode.
Tap 1 is the lowest cfm setting, while tap 4 is the highest cfm
setting. To avoid air coil freeze-up, tap 1 may not be used if the
Dehumidification
mode is selected. See Table 11.

1. Wire the sensor to the controller. See Fig. 15-25.
Install a field-supplied 250-ohin,
resistor
across
the controller's
terminals.

-W
........
!r--_

If the cable used to wire the IAQ sensor to the controller
will be less than 100 ft, an unshielded 22 AWG (American
Wire Gage) cable should be used. If the cable will be greater
than 100 ft, a shield 22 AWG cable should be used. The cable
should have a maximum length of 500 ft.

LOW VOYAGE
CONNECTOR

1/4 watt, 2% tolerance
RH!IAQ
and Gnd

HEATING -- The heating setting determines the heating cfm
for 50PSH, PSV, PSD units. Tap 1 is the lowest cfm setting,
while tap 4 is the highest cfm setting. See Table 11.

Wiring a Relative Humidity (RH) Sensor -- The RH sensor
is used for zone humidity control (dehumidification)
if the
WSHP unit has a dehumidification
device. If not, the sensor
only monitors humidity.

CFM ADJUST -- The CFM Adjust setting allows four selections. The NORM setting is the factory default position. The +
or- settings adjust the airflow by 4-15%. The + or- settings are
used to "fine rune" airflow adjustments. The TEST setting runs
the ECM at 70% torque, which causes the motor to operate
like a standard PSC motor, and disables the cfm counter. See
Tables 11-13 for ECM and PSC blower motors performance
data.

NOTE: Do not use a relative humidity sensor and CO 2 sensor
on the sane zone controller if both sensors are powered off the
board. If sensors are externally powered, both sensors may be
used on the same zone controller.
If the cable used to wire the RH sensor to the controller will
be less than 100 ft, an unshielded 22 AWG (American Wire
29

DEHUMIDIFICATION
MODE-- Thedehumidification
mode
setting
provides
fieldselection
ofhumidity
control.
When
operatinginthenormal
mode,
thecooling
airflowsettings
aredetermined
bythecooling
tapsetting
inTable
11.Whendehumidification
isenabled,
there
isareduction
inairflowincooling
toincreasethe moistureremovalof the heatpump.The
Dehumidification
mode
canbeenabled
intwoways:
1. Constant
Dehumidification
mode:
WhentheDehumidificationmodeis selected
viaDIPswitch,theECMwill
operate
witha multiplierapplied
to thecoolingCFM
settings
(approximately
20to25%lowerairflow).Any
timetheunitisrunning
intheCooling
mode,
it willoperateatthelowerairflowtohnprove
latentcapacity.
The
"DEHUM"
LEDwillbeilluminated
atalltimes.
Heating
airflowisnotaffected.

NOTE: Do not select Dehumidification
setting is tap 1.
2.

mode if cooling

Automatic
(humidistat-controlled)
Dehumidification
mode: When the Dehumidification
mode is selected
via DIP switch AND a humidistat is connected to terminal DH, the cooling airflow will only be reduced when
the humidistat senses that additional dehumidification
is
required. The DH terminal is reverse logic. Therefore,
a humidistat
(not dehumidistat)
is required.
The
"DEHUM" LED will be illuminated only when the humidistat is calling for Dehumidification
mode. Heating
airflow is not affected.
NOTE: Do not select Dehumidification
setting is tap 1.

mode if cooling

Table 11 -- ECM Blower Motor Performance Data
50PS
UNIT
SIZE

MAX
ESP
(in. wg)

FAN
MOTOR
(hp)

TAP
SETTING

DEHUMIDIFICATION MODE

COOLING MODE
(cfm)

(cfm)

HEATING MODE
(cfm)

Stage 1
750
700
620
530

Stage 2
620
570
510
430

Fan
380
350
310
270

Stage 1
590
550
480
--

Stage 2
480
450
400
--

Fan
380
350
310
--

Stage 1
750
700
620
530

Stage 2
620
570
510
430

Fan
380
350
310
270

018

0.50

1/2

4
3
2
1

024

0.50

1/2

4
3
2
1

950
850
730
610

780
700
600
500

470
420
360
300

740
660
570
--

610
540
470
--

470
420
360
--

1060
950
820
690

870
780
670
570

470
420
360
300

030

0.50

1/2

4
3
2
1

1130
1000
880
750

920
820
720
620

560
500
440
380

880
780
680
--

720
640
560
--

560
500
440
--

1230
1100
980
850

1000
900
800
700

560
500
440
380

036

0.50

1/2

4
3
2
1

1400
1250
1080
900

1150
1020
890
740

700
630
540
450

1090
980
840
--

900
800
690
--

700
630
540
--

1400
1250
1080
900

1150
1020
890
740

700
630
540
450

042

0.50

1/2

4
3
2
1

1580
1400
1230
1050

1290
1150
1000
860

790
700
610
530

1230
1100
960
--

1010
900
790
--

790
700
610
--

1580
1400
1230
1050

1290
1150
1000
860

790
700
610
530

048

0.75

4
3
2
1

1730
1550
1330
1120

1420
1270
1090
920

870
780
670
560

1350
1210
1040
--

1110
990
850
--

870
780
670
--

1850
1650
1430
1200

1520
1350
1180
980

870
780
670
560

060

0.75

4
3
2
1

2050
1825
1580
1320

1680
1500
1300
1080

1030
910
790
660

1600
1420
1230
--

1310
1170
1010
--

1030
910
790
--

2280
2050
1750
1470

1870
1680
1430
1210

1030
910
790
660

070

0.75

4
3
2
1

2230
1950
1700
1450

1780
1600
1400
1200

1100
980
850
730

1710
1520
1330
--

1400
1250
1090
--

1100
980
850
--

2230
2100
1840
1520

1780
1680
1470
1220

1100
980
850
730

LEGEND

ESP -- External Static Pressure
5.
6.

NOTES:
1. Factory setting is Tap Setting 2.
2. Airflow is controlled within 5% up to the Max ESP shown with
wet coil.
3. Do not select Dehumidification
mode if Tap Setting is on
Setting 1.

All units are ARI/ISO (Air Conditioning & Refrigeration Institute/
International Organization for Standardization)
13256-1 rated
Tap Setting 3.
Airflow in cfm with wet coil and clean air filter.
Units have an ECM (electronically commuted motor) fan motor
as a standard feature. The small additional pressure drop of
the reheat coil causes the ECM motor to slightly increase rpm
to overcome the added pressure drop and maintain selected
cfm up to maximum ESP (external static pressure).
Unit sizes 006-012 are not available with ECM motors.

Table
50PS
UNIT
SIZE

RATED
AIRFLOW

018

MIN
CFM

450

600

O24

600

85O

030

750

950

036

900

1250

O42

1400

048

1600

1050

1200

060

1950

1500

070

2100

1800

12 -- PSC Blower Motor Performance

FAN

AIRFLOW

(cfm) AT EXTERNAL

---

0.00
704
602
531
894
765
683

0.05
708
601
529
886
760
672

0.10
711
599
527
877
755
661

0.15
702
590
522
859
747
649

0.20
693
581
517
841
738
636

0.25
692
583
512
827
725
616

0.30
690
585
506
812
711
596

0.35
683
579
501
786
690
584

0.40
675
573
495
760
668
571

0.45
658
560
479
744
654
560

HI
MED
LO
HSHI
HSMED
HS LO
HI
MED
LO
HSHI
HSMED
HSLO
HI
MED

965
841
723
1271
1048
890
1271
1048
890
1439
1186
1039
1411
1171

960
833
715
1250
1037
887
1250
1037
887
1411
1174
1038
1407
1164

954
825
707
1229
1025
884
1229
1025
884
1383
1162
1036
1402
1156

943
817
703
1207
1016
879
1207
1016
879
1355
1151
1028
1390
1145

931
809
698
1185
1007
874
1185
1007
874
1327
1140
1020
1378
1133

923
800
689
1164
994
865
1164
994
865
1297
1126
1009
1370
1113

914
790
680
1143
981
855
1143
981
855
1266
1112
997
1361
1092

898
777
668
1118
962
842
1118
962
842
1232
1089
983
1326
1064

882
763
656
1093
943
829
1093
943
829
1198
1065
968
1290
1035

862
747
642
1061
915
809
1061
915
809
1160
1039
946
1248
997

LO
HSHI
HSMED
HS LO
HI
NED
LO
HSHI
HSMED
HSLO

983
1648
1344
1141
1634
1332
1130
1798
1384
1091

967
1633
1335
1128
1626
1323
1109
1781
1382
1088

950
1617
1325
1115
1618
1314
1088
1764
1379
1084

943
1597
1312
1106
1606
1298
1086
1738
1375
1081

936
1576
1299
1097
1594
1282
1084
1711
1371
1078

936
15571 • 15371 , 14931 •
1276 I 1253 I 12201
1077
1057
1031
1583 11571
1263 I 1243 I 12061
1066
1048
1052
1688 I 1665 1163ol
1356 I 1341
1318
1069
1060
::
,i"

HI
MED
LO
HS HI
HS MED
HSLO

0.50
0.60
).70
0.80
640
598
515 ii
547
492
:i
462
728 I 659 ......
640
602
549
',,,: iii:[i
842 I
731
627 i

794 ]
686

886 I
789
1029 I
886
789

822 I
726
953
822

1013 I

946 I

lO291

731
660
875 I

1115

i:ii:i

626

i ,
{
:
'

753
ii

11221io4;i;&i ;3o
923I 866 I
1205
958

lO6O

159511555
11514
1294
i

1.00

1083 I

870 I
798
942:

76211

1448 I• 13971 , 13451 , 12071 , 1051 ,I
1186 I 1143 I 1099
1007 I 903
1005 I 966
926
1169
1055

0.90

7251
635
623 iii,iii
::
,,_t

11539
11507
11464
114201265I lO78
1261 I 1227
;i

;i::

957
:i

;
[

142011239
::

:::

11555
11514142011239

1798
1781
1764
1738
1711
1688 11665 163o 1595
1384
1382
1379
1375
1371
1356 I 1341
1318
1294 I 1261 I 1227
................................
.............................................................................................................................................
.....................................................
.............................................................
....................
.........................................
............................................................
........
1858
1716

1834
1694

1807
1673

1780
1651

1746
1634

1711
1617

1676
1584

1640
1551

1604
1508

1567
1465

1469
1390

1378
1321

1286
1228

HI
MED

2311
2058

2306
2049

2300
2039

2290
2028

2279
2016

2268
2000

2257
1983

2233
1966

2209
1949

2175
1935

2140
1920

2088
1874

1990
1807

1901
1750

1856
1670

1752
1582

LO
HS HI
HSMED
HS LO

1868
2510
2171
2010

1863
2498
2167
2008

1858
2486
2162
2006

1858
2471
2162
2006

1858
2455
2162
2006

1848
2440
2158
2006

1838
2424
2153
2006

1822
2401
2135
1992

1806
2377
2117
1977

1799
2348
2101
1962

1792
2318
2085
1947

1749
2247
2024
1892

1699
2161
1971
1851

1636
2078
1891
1782

1570
1986
1823
1705

::i
1855
1691
1600

HI
MED
LO

2510
2171
2010

2498
2167
2008

2486
2162
2006

2471
2162
2006

2455
2162
2006

2440
2158
2006

2424
2153
2006

2401
2135
1992

2377
2117
1977

2348
2101
1962

2318
2085
1947

2247
2024
1892

2161
1971
1851

2078
1891

1986
1823

COIL
FACE VELOCITY
FPM

1855
i
i

NOTES:
1. Shaded areas denote ESP where operation is not recommended.
2. Units factory shipped on medium speed. Other speeds require field
selection.
3. All airflow is rated and shown above at the lower voltage if unit is dual
voltage rated, e.g., 208 v for 208/230 v units.
4. Only two-speed fan (high and medium) available on 575 v units.
5. Data for units 006-012 not available at time of printing.

External Static Pressure
High Static

13 -- PSC Blower Motor Performance

Data for 50PS Units with HWR

UNITS WITH REHEAT ESP LOSS

200

018
in. wg
0.037

024,030
in. wg
0.033

036
in. wg
0.031

042,048
in. wg
0.028

060,070
in. wg
0.026

250

0.052

0.046

0.042

0.038

0.034

300

0.077

0.066

0.059

0.051

0.044

350

0.113

0.096

0.085

0.073

0.061

400

0.181

0.160

0.145

0.131

0.117

450

0.242

0.226

0.215

0.205

0.194

500

0.360

0.345

0.335

0.326

0.316

LEGEND
---

(in. wg)

1881
1738

Table

ESP
HWR

STATIC PRESSURE

SPEED
HI
MED
LO
HSHI
HS MED
HS LO

LEGEND
ESP
HS

Data

External Static Pressure
Hot Water Reheat

NOTES:
1. For units with HWR coil applications, calculate face velocity of the entering air. From the data table, find ESP for reheat application. The loss
includes wet coil loss.
2. Data for units 006-012 not available at time of printing.

PRE-START-UP

AIR COIL FREEZE
TING--Select
jumper
FP2 limit of either 30 F
NOT clip the jumper.
jumper.

System Checkout

E When the installation is complete,
follow the system checkout procedure outlined below before
starting up the system. Be sure:
1. Voltage is within the utilization range specifications of the
unit compressor and fan motor and voltage is balanced
for 3-phase units.
2. Fuses, breakers and wire are correct size.
3.

Low voltage wiring is complete.

Piping and system flushing is complete.

Air is purged from closed loop system.

System is balanced as required.

Isolation valves are open.

Water control valves or loop pumps are wired.

Condensate

10.

Transformer

ALARM RELAY SETTING -- Select jumper 4 (JW4-AL2
Dry) to either connect alarm relay terminal (AL2) to 24 vac (R)
or to remain as a dry contact (no connection). To connect AL2
to R, DO NOT clip the jumper. To set as dry contact, clip the
jumper.
LOW PRESSURE
SETTING -- The Deluxe D control can
be configured for Low Pressure Setting (LP). Select jumper 1
(JIV1-LP Norm Open) for choosing between low pressure
input normally opened or closed. To configure for normally
closed operation, DO NOT clip the jumper. To configure for
normally open operation, clip the jumper.

Monitor if necessary.

Complete

C Control DIP Switches
E The Complete C control has 1 DIP (dual in-line package) switch bank
with five switches labeled SWl. See Fig. 15, 17, 18, 20, 21, or
23.

line is open and correctly pitched.
switched to lower voltage tap if necessary.

11. Blower rotates freely--

shipping support is removed.

12.

Blower speed is on correct setting.

13.

Air filter is clean and in position.

14.

Service/access

15.
16.

Return-air temperature
50 to 110 F cooling.
Air coil is clean.

17.

Control field-selected

PERFORMANCE
MONITOR (PM) -- The PM is a unique
feature that monitors water temperature and will display a waming when heat pump is beyond typical operating range. Refer to
Control Operation section for detailed information. DIP switch
1 will enable or disable this feature. To enable the PM, set the
switch to ON. To disable the PM, set the switch to OFF.

panels are in place.
is between 40 to 80 F heating and

STAGE 2 -- DIP switch 2 will enable or disable compressor
delay. Set DIP switch to OFF for stage 2 in which the compressor will have a 3-second delay before energizing.

settings are correct.

AIR COIL -- To obtain maximum performance, clean the air
coil before starting the unit. A 10% solution of dishwasher
detergent and water is recolrunended
for both sides of the coil.
Rinse thoroughly with water.

FIELD SELECTABLE

NOTE: The alarm relay will not cycle during
switch is set to OFF, stage 2.
SWITCH 3 -- Not used.

Jumpers and DIP (dual in-line package) switches on the
control board are used to customize unit operation and can be
configured in the field.

Complete

C Control

Jumper

I
[

Settings

Deluxe

D Control DIP Switches _ The Deluxe D
control has 2 DIP (dual m-line package) switch banks. Each
bank has 8 switches and is labeled either S1 or $2 on the circuit board. See Fig. 16, 19, 22, or 24.

WATER COIL FREEZE
PROTECTION
(FP1) LIMIT
SETTING--Select
jumper
3 (JW3-FP1
Low Temp) to
choose FP1 limit of either 30 F or 10 E To select 30 F as the
limit, DO NOT clip the jumper. To select 10 F as the limit, clip
the jumper.

DIP SWITCH BANK 1 (S1) -- This set of switches offers
the following options for Deluxe D control configuration:
Performance Monitor (PM) --The
PM is a unique feature
that monitors water temperature and will display a warning
when heat pump is beyond typical operating range. Set switch 1
to enable or disable performance monitor. To enable the PM, set
the switch to ON. To disable the PM, set the switch to OFF.

AIR COIL FREEZE PROTECTION
(FP2) LIMIT SETTINGSelect jumper 2 (JW2-FP2 Low Temp) to choose
FP2 limit of either 30 F or 10 F. To select 30 F as the limit, DO
NOT clip the jumper. To select 10 F as the limit, clip the
jumper.
ALARM RELAY SETTING-Select jumper 1 (JIV1-AL2
Dry) to either connect alarm relay terminal (AL2) to 24 vac (R)
or to remain as a dry contact (no connection). To connect AL2
to R, DO NOT clip the jumper. To set as dry contact, clip the
jumper.

Deluxe

D Control

Jumper

Test mode if

DDC OUTPUT AT EH2 -- Switch 4 provides a selection for
Direct Digital Control (DDC) operation. If set to DDC output
at EH2, the EH2 terminal will continuously output the last fault
code of the controller. If the control is set to EH2 Normal, then
EH2 will operate as standard electric heat output. Set the
switch to ON to set the EH2 to normal. Set the switch to OFF
to set the DDC output at EH2.
FACTORY SETTINGSwitch 5 is set to ON. Do not
change the switch to OFF unless instructed to do so by the
factory.

INPUTS

be clipped when power to control board has been turned
IMPORTANT:
off.
Jumpers and DIP switches should only

PROTECTION
(FP2) LIMIT SET2 (JW2-FP2 Low Temp) to choose
or 10 E To select 30 F as the limit, DO
To select 10 F as the limit, clip the

Compressor
Relay Staging Operation -- Switch 2 will enable or disable compressor relay staging operation. The compressor relay can be set to turn on with stage 1 or stage 2 call
from the thermostat. This setting is used with dual stage units
(units with 2 compressors and 2 Deluxe D controls) or in master/slave applications. In master/slave applications, each compressor and fan will stage according to its switch 2 setting. If
switch is set to stage 2, the compressor will have a 3-second
delay before energizing during stage 2 demand.

Settings

NOTE: If DIP switch is set for stage 2, the alarm relay will not
cycle during Test mode.

Table 15 -- DIP Switch Block S2 -Accessory 2 Relay Options

Heating/Cooling
Thermostat Type -- Switch 3 provides selection of thermostat type. Heat pump or heat/cool thermostats
can be selected. Select OFF for heat/cool thermostats. When in
heat/cool mode, Y1 is used for cooling stage 1, Y2 is used for
cooling stage 2, Wl is used for heating stage 1 and O/W2 is
used for heating stage 2. Select ON for heat pump thermostats.
In heat pump mode, Y1 used is for compressor stage 1, Y2 is
used for compressor stage 2, Wl is used for heating stage 3 or
emergency heat, and O/W2 is used for reversing valve (heating
or cooling) depending upon switch 4 setting.

ACCESSORY
2
RELAY OPTIONS
Cycle with

NSB
OAD

If switch 8 is set for 50 F, then the compressor will be used
for heating as long as the FP1 is above 50 E The compressor
will not be used for heating when the FP1 is below 50 F and the
compressor will operates in emergency heat mode, staging on
EH1 and EH2 to provide heat. Ifa thermal switch is being used
instead of the FP1 thermistoc only the compressor will be used
for heating mode when the FP1 terminals are closed. If the FP1
terminals are open, the compressor is not used and the control
goes into emergency heat mode.

with

(HWR)

Option

Water

On
On

Off
On

On
Off

Humidistat

Off

Dehumidistat

Off

Valve -- Slow
OAD

ReheatReheat

Opening

•
•
•
•
•
•

DIP SWITCH POSITION
1
2
3
On

LEGEND
NSB
OAD

---

Night Setback
Outside Air Damper

NOTE: All other DIP switch combinations

On
Off

combinations

are invalid.

Modulating

Hot

Water

Reheat

Humidistat/Dehumidistat
Logic and
Deluxe D DIP Switch Settings

Sensor
Humidistat

2.1
Off

2.2
Off

2.3
Off

Logic
Reverse

Dehumidistat

Off

Standard

Reheat
Reheat
(ON)- H (OFF)- H
0 VAC
24 VAC
24 VAC

0 VAC

Table 17 shows the relationship between thermostat input
signals and unit operation. There are four operational inputs for
single-stage units and six operational
inputs for dual-stage
units:

Table 14 -- DIP Switch Block $2 -Accessory 1 Relay Options

Off
On

Night Setback
Outside Air Damper

Table 16-

combinations.

On
On

The reheat mode requires either a separate humidistat/
dehumidistat or a thermostat that has an integrated dehumidification function for activation. The Deluxe D board is configured to work with either a humidistat or dehumidistat input to
terminal '°H" (DIP switch settings for the Deluxe D board are
shown in Table 16). Upon receiving an '°H" input, the Deluxe
D board will activate the cooling mode and engage reheat.

Switches 4 to 6 -- These DIP switches provide selection of
Accessory 2 relay options. See Table 15 for DIP switch

Off

---

Units

Switches 1 to 3 -- These DIP switches provide selection of
Accessory
1 relay options. See Table 14 for DIP switch
combinations.

E A heat pump equipped with hot water
reheat (HWR) can operate in three modes: cooling, cooling
with reheat, and heating. The cooling and heating modes are
like any other water source heat pump. The reversing valve
("O" signal) is energized in cooling, along with the compressor
contactor(s) and blower relay. In the heating mode, the reversing valve is deenergized. Almost any thermostat will activate
the heat pump in heating or cooling modes. The Deluxe D
microprocessor
board, which is standard with the HWR
option, will accept either heat pump (Y,O) thermostats or nonheat pump (Y,W) thermostats.

Boilerless Changeover
Temperature
-- Switch 8 on S1 provides selection of boilerless changeover temperature set point.
Select OFF for set point of 50 F or select ON for set point of
40 E

NSB

Off

Factory Setting -- Switch 8 is set to ON. Do not change the
switch to OFF unless instructed to do so by the factory.

Boilerless Operation -- Switch 7 provides selection of boilerless operation and works in coNunction with switch 8. In boilerless operation mode, only the compressor is used for heating
when FP1 is above the boilerless changeover temperature set
by switch 8 below. Select ON for normal operation or select
OFF for boilerless operation.

Digital

Auto Dehumidification
Mode or High Fan Mode -- Switch 7
provides selection of auto dehumidification
fan mode or high
fan mode. In auto dehumidification
fan mode, the fan speed
relay will remain off during cooling stage 2 if terminal H is
active. In high fan mode, the fan enable and fan speed relays will
turn on when terminal H is active. Set the switch to ON for auto
dehumidification
fan mode or to OFF for high fan mode.

Out_put -- Switch 6 provides selection for DDC operation. If
set to DDC output at EH2, the EH2 terminal will continuously
output the last fault code of the controller. If the control is set to
EH2 normal, then the EH2 will operate as standard electric
heat output. Set the switch to ON to set the EH2 to normal. Set
the switch to OFF to set the DDC output at EH2.

Cycle with Fan

Valve -- Slow Opening
OAD

NOTE: All other switch

Dehumidification
Fan Mode -- Switch 5 provides selection
of normal or dehumidification
fan mode. Select OFF for dehumidification mode. The fan speed relay will remain OFF during cooling stage 2. Select ON for normal mode. The fan speed
relay will turn on during cooling stage 2 in normal mode.

ACCESSORY
1
RELAY OPTIONS

NSB

LEGEND

O/B Thermostat Type -- Switch 4 provides selection for heat
pump O/B thermostats. O is cooling output. B is heating output. Select ON for thermostats with O output. Select OFF for
thermostats with B output.

DIP SWITCH BANK 2 ($2) -- This set of DIP switches
used to configure accessory relay options.

Compressor

Digital
Water

DIP SWITCH POSITION
4
5
6

are invalid.

Fan Only
Cooling Stage
Cooling Stage
Heating Stage
Heating Stage
Reheat Mode

1
2
1
2

HWR APPLICATION
CONSIDERATIONS
-- Unlike
mosthotgasreheat
options,
theHWRoptionwill operate
overa widerangeof entering-water
temperatures
(EWTs).
Specialflow regulation(waterregulatingvalve)is not
required
for lowEWTconditions.
However,
below55 F,
supply-airtemperatures
cannotbe maintained
at 72 F
because
thecoolingcapacity
exceeds
thereheat
coilcapacity at lowwatertemperatures.
Below55F,essentially
all
wateris diverted
tothereheatcoil(noheatofrejection
to
thebuildingloop).Although
theHWRoptionwillworkfine
withlowEWTs,overcooling
of thespace
mayresultwith
wellwatersystems
or,onrareoccasions,
withground
loop
(geothermal)
systems
(NOTE:Extended
rangeunitsare
required
for wellwaterandgroundloopsystems).
Since
dehumidification
isgenerally
onlyrequired
in cooling,
most
ground
loopsystems
will notexperience
overcooling
of the
supply-air
temperature.
If overcooling
ofthespace
isaconcern(e.g.,computer
roomwellwaterapplication),
auxiliary
heatingmayberequiredto maintainspacetemperature
whentheunitis operating
in thedehumidification
mode.
Watersource
heatpumps
withHWRshouldnotbeusedas
makeup
airunits.These
applications
should
useequipment
specifically
designed
formakeup
air.

Table 17MODE
No Demand
Fan Only
Cooling Stage 1
Cooling Stage 2
Cooling and Dehumidistatt
Dehumidistat

Only

Heating Stage 1
Heating Stage 2
Heating and Dehumidistat**

HWRCOMPONENT
FUNCTIONS-- Theproportional
controller
operates
on24VACpower
supply
andautomatically
adjusts
thewatervalvebased
onthesupply-air
sensor.
The
supply-air
sensor
senses
supply-air
temperature
attheblower
inlet,providing
theinputsignal
necessary
fortheproportional
control
todrivethemotorized
valveduring
thereheat
mode
of
operation.
Themotorized
valveisaproportional
actuator/threewayvalvecombination
usedto divertthecondenser
water
fromthecoaxto thehydronic
reheat
coilduringthereheat
mode
of operation.
Theproportional
controller
sends
asignal
to themotorized
valvebased
onthesupply-air
temperature
reading
fromthesupply
airsensor.
Thelooppumpcirculates
condenser
waterthrough
thehydronic
reheat
coilduring
thereheat
mode
ofoperation
(referto
Fig.34).In thisapplication,
thelooppumpis onlyenergized
duringthereheat
mode
ofoperation.
Thehydronic
coilis utilizedduring
thereheat
mode
ofoperation
toreheat
theairtothe
setpointoftheproportional
controller.
Condenser
waterisdiverted
bythemotorized
valveandpumped
through
thehydronic coilbythelooppumpinproportion
tothecontrol
setpoint.
Theamount
ofreheating
isdependent
onthesetpointandhow
farfromthesetpointthesupply
airtemperature
is.Thefactory
setpointis70to75F,generally
considered
"neutral"
air.

HWR Operating Modes

INPUT
Y1

Y2*

OUTPUT
Y1

On/Off
On/Off
On

Off
On
On

Off
Off
On

Off
Off
Off

On/Off
On/Off
On

Off
On
On

Off
Off
On

On
On

On
On/Off

Off
On

On
On

On/Off
Off

Off
On

Off
Off

On
Off

On
On

Off
Off

On
On

On
On/Off

Off
On

Off
Off

On
On

Y2*
Off
Off
Off
On
On/Off
On
Off
On
On/Off

*Not applicable for single stage units; Full load operation for dual
capacity units.
1-Cooling input takes priority over dehumidify input.
**Deluxe D is programmed to ignore the H demand when the unit is
in heating mode.
NOTE: On/Off is either on or off.

Water Out
(To Water Loop)

Water In
(From Water Loop)

Refrigerant In
(Cooling)

Mixing Valve

Internal Pump

COAX

Refrigerant Out
(Cooling)

Entering Air -_

Evaporator Coil

NOTE: All components shown are
internal to the heat pump unit.

Fig. 34 -- HWR Schematic

Leaving
Air

Reheat
Coil

Reheat
Off
Off
Off
Off
Off
On
Off
Off
Off

1.
2.
3.
4.

Restore power to system.
Turn thermostat fan position
Balance airflow at registers.
Adjust all valves to the full
line power to all heat pump
5. Operate unit in the cooling
unit operating lrinits.

Deluxe D Control Accessory Relay Configurations -- The following accessory relay settings are applicable for Deluxe D control:
CYCLE WITH FAN -- In this configuration, the accessory
relay 1 will be ON any trine the Fan Enable relay is on.
CYCLE WITH COMPRESSOR
-- In this configuration, the
accessory relay 2 will be ON any time the Compressor relay
IS on.

to ON. Blower should start.
open position and turn on the
units.
cycle. Refer to Table 14 for

NOTE: Three factors determine the operating limits of a unit:
(1) entering air temperature,
(2) water temperature and (3)
ambient temperature. Whenever any of these factors are at a
minimum or maximum level, the other two factors must be at a
normal level to ensure proper unit operation. See Table 18.

DIGITAL NIGHT SET BACK (NSB) -- In this configuration, the relay will be ON if the NSB input is connected to
ground C.
NOTE: If there are no relays configured for digital NSB, then
the NSB and override (OVR) inputs are automatically configured for mechanical operation.

Table 18 n Operating Limits -50PSH, PSV, PSD Units

MECHANICAL
NIGHT SET BACK -- When NSB input is
connected to ground C, all thermostat inputs are ignored. A
thermostat set back heating call will then be connected to the
OVR input. If OVR input becomes active, then the Deluxe D
control will enter night low limit (NLL) staged heating mode.
The NLL staged heating mode will then provide heating during the NSB period.

AIR LIMITS
Min. Ambient Air
Rated Ambient Air
Max. Ambient

COOLING
45
80.6

Air

Min. Entering Air
Rated Entering Air db/wb
Max. Entering Air db/wb
WATER LIMITS

WATER VALVE (SLOW OPENING) -- If relay is configured
for Water Valve (slow opening), the relay will start 60 seconds
prior to starting compressor relay.

Min. Entering Water
Normal Entering Water
Max. Entering Water
LEGEND

OUTSIDE AIR DAMPER (OAD) -- If relay is configured for
OAD, the relay will normally be ON any time the Fan Enable
relay is energized. The relay will not start for 30 minutes following a return to normal mode from NSB, when NSB is no
longer connected to ground C. After 30 minutes, the relay will
start if the Fan Enable is set to ON.

db
wb

---

(F)

HEATING
39
68

110
50

85
40

80/67
110/83

68
80

50-110
120

30-70
90

(F)

Dry Bulb
Wet Bulb

NOTE: Value in heating
acceptable.

column

is dry bulb only. Any wet bulb reading is

Scroll Compressor

Rotation E It is important to be
certain compressor
is rotating in the proper direction. To
determine whether or not compressor is rotating in the proper
direction:

To avoid equipment damage, DO NOT leave system filled
in a building without heat during the winter unless antifreeze is added to system water. Condenser coils never
fully drain by themselves and will freeze unless winterized
with antifreeze.

1. Connect service gages to suction and discharge pressure
fittings.
2. Energize the compressor.
3. The suction pressure should drop and the discharge
pressure should rise, as is normal on any start-up.

START-UP
Use the procedure
start-up.

outlined

NOTE: This equipment

is designed for indoor installation only.

Operating

below to initiate proper

If the suction pressure does not drop and the discharge
pressure does not rise to normal levels:

unit

1. Turn offpower to the unit. Install disconnect tag.
2. Reverse any two of the unit power leads.
3. Reapply power to the unit and verify pressures are correct.
The suction and discharge pressure levels should now move
to their normal start-up levels.
When the compressor is rotating in the wrong direction, the
unit makes more noise and does not provide cooling.
After a few minutes of reverse operation, the scroll compressor internal overload protection will open, thus activating
the unit lockout. This requires a manual reset. To reset, turn the
thermostat on and then off.

Limits

ENVIRONMENTThis equipment is designed for indoor
installation ONLY Extreme variations in temperature, humidity and corrosive water or air will adversely affect the unit performance, reliability and service life.
POWER SUPPLY -- A voltage variation
plate utilization voltage is acceptable.

of+

10% of name-

UNIT START1NG CONDITIONS--Units
start and operate
in an ambient temperature of 45 F with entering-air temperature at 50 F, entering-water
temperature at 60 F and with both
air and water at the flow rates used.

NOTE: There is a 5-minute
will start.

Unit Start-Up

NOTE: These operating lrinits are not normal or continuous
operating conditions. Assume that such a start-up is for the
purpose of bringing the building space up to occupancy temperature. See Table 18 for operating limits.

Cooling

time delay before the compressor

Mode

1. Adjust the unit thermostat
Slowly reduce the thermostat
sor activates.
2.

When the disconnect switch is closed, high voltage is
present in some areas of the electrical panel. Exercise caution when working with the energized equipment. Failure
to heed this warning may result in personal iniury.

to the warmest position.
position until the compres-

Check for cool air delivery at unit grille a few minutes
after the unit has begun to operate.
Verify that the compressor is on and that the water flow
rate is correct by measuring pressure drop through the
heat exchanger using P/T plugs. See Table 19. Check the
elevation and cleanliness of the condensate lines; any
dripping could be a sign of a blocked line. Be sure the
condensate trap includes a water seal.

4. Checkthetemperature
of bothsupplyanddischarge
water.
Compare
toTables
20-30.
If temperature
iswithin
range,
proceed.
If temperature
isoutside
therange,
check
thecooling
refrigerant
pressures
inTables
20-30.
5. Check
airtemperature
dropacross
thecoilwhencompressor
is operating.
Air temperature
dropshouldbe
between
15and25E

Unit Start-Up

cooling cycle. Allow

COOLING
RISE (F)
Min
Max

For Closed Loop: Ground Source or
Cooling/Boiler Systems at 3 gpm/ton
For Open Loop: Ground Water Systems
1.5 gpm/ton

Mode

5 minutes

between

tests for the pressure

or reversing valve to equalize.
1. Turn thermostat to lowest
switch to HEAT position.

setting

and

set thermostat

2. Slowly turn the thermostat to a higher temperature until

Table 19 -- Water Temperature Change
through Heat Exchanger
WATER FLOW RATE (GPM)

Heating

NOTE: Operate the unit in heating cycle after checking the

the compressor

activates.

3. Check for warm air delivery at the unit grille within a few

HEATING
DROP (F)
Min
Max

minutes after the unit has begun to operate.
Check the temperature
of both supply and discharge
water. Compare to Tables 20-30. If temperature is within
range, proceed. If temperature is outside the range, check
the heating refrigerant pressures in Tables 20-30.

5. Once the unit has begun to run, check for warm air delivery at the unit grille.
6. Check air temperature rise across the coil when compressor is operating. Air temperature rise should be between
20 and 30 F after 15 minutes at load.

7. Check for vibration, noise and water leaks.

Table 20 -- 50PSH, PSV, PSD006 Typical Unit Operating Pressures and Temperatures
ENTERING
WATER
TEMP
(F)

FULL LOAD COOLING
WATER
FLOW
(GPM/ton)

Suction
Pressure
(psig)

Discharge
Pressure
(psig)

Superheat
(F)

--WITHOUT
Subcooling
(F)

HWG ACTIVE

FULL LOAD HEATING -- WITHOUT

Water
Temp
Rise
(F)

Air Temp
Drop
(F) DB

Suction
Pressure
(psig)

Discharge
Pressure
(psig)

Superheat
(F)

HWG ACTIVE

Subcooling
(F)

Water
Temp
Drop
(F)

AirRise
Temp
(F) DB

1.5
2.25
3

114-124
111-121
109-119

142-162
132-152
122-142

24-29
26-31
28-33

3-8
3-8
3-8

15.2-17.2
11.4-13.4
7.5-9.5

17-23
17-23
17-23

75-85
78-88
81-91

272-292
274-294
276-296

13-18
13-18
13-18

4- 9
4- 9
4- 9

5.9- 7.9
4.3-6.3
2.7-4.7

16-22
16-22
17-23

1.5
2.25
3

130-140
129-139
128-138

190-210
180-200
170-190

14-19
16-21
19-24

2-7
2-7
2-7

16.5-18.5
12.3-14.3
8.00-10.0

18-24
18-24
18-24

104-114
112-122
120-130

299-319
304-324
308-328

12-17
12-17
12-17

6-11
4- 9
3- 8

8.8-10.8
6.7-8.7
4.5- 6.5

21-27
22-28
23-29

1.5
2.25
3

143-153
141-151
140-150

265-285
252-272
240-260

9-14
10-15
11-16

2-7
2-7
2-7

15.5-17.5
11.5-13.5
7.5-9.5

18-24
18-24
18-24

129-139
144-154
159-169

321-341
330-350
340-360

11-16
13-18
15-20

7-12
4- 9
3- 8

11.2-13.2
8.8- 10.8
6.3- 8.3

25-31
27-33
28-34

1.5
2.25
3

149-159
149-159
148-158

340-370
335-355
320-340

8-13
8-13
8-13

2-7
2-7
2-7

14.2-16.2
10.6-12.6
7.00-9.00

17-23
17-23
17-23

163-173
180-190
198-208

349-369
360-380
372-392

13-18
11-16
10-15

7-12
4- 9
3- 8

14.3-16.3
11.2-13.2
8.1-10.1

30-36
32-38
34-40

110

1.5
2.25
3

154-164
154-164
153-163

451-471
428-448
405-425

8-13
8-13
8-13

2-7
2-7
2-7

12.7-14.7
9.5-11.5
6.5-8.5

15-21
15-21
15-21

......
......
......

LEGEND
DB
HWG
--

----

Dry Bulb
Hot Water Generator
No Heating Operation

in This Temperature

Range

Table 21 -- 50PSH, PSV, PSD009 Typical
ENTERING
WATER
TEMP
(F)

FULL LOAD COOLING
WATER
FLOW
(GPM/ton)

--WITHOUT
Subcooling
(F)

Unit Operating Pressures and Temperatures

HWG ACTIVE

FULL LOAD HEATING --WITHOUT

Water
Temp
Rise
(F)

Air Temp
Drop
(F) DB

Suction
Pressure
(psig)

Discharge
Pressure
(psig)

Air Temp
Rise
(F) DB

Discharge
Pressure
(psig)

Superheat
(F)

1.5
2.25
3

126-136
126-136
126-136

161-181
146-166
131-151

17-22
17-22
17-22

8-13
7-12
6-11

19.8-21.8
14.9-16.9
9.9-11.9

21-27
21-27
21-27

74-84
77-87
79-89

278-298
280-300
283-303

6-11
6-11
6-11

4-9
4-9
3-8

6.t-8.1
4.5-6.5
2.8-4.8

18-24
18-24
19-25

1.5
2.25
3

132-142
132-142
132-142

215-235
200-220
185-205

10-15
10-15
10-15

8-13
7-12
6-11

18.8-20.8
14.1-16.1
9.4-11.4

20-26
20-26
20-26

104-114
106-116
108-118

309-329
312-332
315-335

8-12
8-12
8-12

7-12
7-12
7-12

9.6-11.6
7.0-9.0
4.5-6.5

24-30
24-30
25-31

1.5
2.25
3

138-148
138-148
137-147

278-298
263-283
248-268

8-13
8-13
8-13

9-14
8-13
7-12

17.7-19.7
13.1-15.1
8.5-10.5

19-25
19-25
19-25

127-137
132-142
138-148

332-352
340-360
347-367

10-15
11-16
13-18

10-15
10-15
10-15

12.0-14.0
9.0-10
6.1-8.1

29-35
29-35
30-36

1.5
2.25
3

142-152
142-152
142-152

365-385
351-371
337-357

8-13
8-13
8-13

9-14
8-13
7-12

16.0-18.0
12.0-14.0
8.0-10.0

18-24
18-24
18-24

164-174
165-175
167-177

372-392
375-395
379-399

17-22
18-23
19-24

13-18
13-18
13-18

14.5-16.5
11.2-13.2
7.9-9.9

35-41
35-41
36-42

1.5
2.25
3

150-160
150-160
150-160

439-459
439-459
439-459

7-12
7-12
7-12

9-14
8-13
7-12

14.2-16.2
10.6-12.6
6.9-8.9

17-23
17-23
17-23

....
....
....

110

DB
HWG
--

----

Dry Bulb
Hot Water Generator
No Heating Operation

in This Temperature

Range

Subcooling
(F)

Water
Temp
Drop

Suction
Pressure
(psig)

LEGEND

Superheat
(F)

HWG ACTIVE

(F)

Table 22 -- 50PSH, PSV, PSD012 Typical Unit Operating Pressures and Temperatures
FULL LOAD COOLING -- WITHOUT

ENTERING
WATER
TEMP

WATER
FLOW
(GPM/ton)

(F)

Suction
Pressure
(psig)

HWG ACTIVE

Discharge
Pressure
(psig)

Superheat
(F)

Subcooling
(F)

Water
Temp
Rise
(F)

FULL LOAD HEATING

Air Temp
Drop
(F) DB

Suction
Pressure
(psig)

Discharge
Pressure
(psig)

-- WITHOUT

HWG ACTIVE

Superheat
(F)

Subcooling
(F)

Water
Temp
Drop
(F)

Air

Temp
Rise

(F) DB

1.5
2.25
3

98-108
98-108
99-109

140-160
135-155
127-148

36-41
36-41
36-41

14-19
12-17
10-15

17.1-19.1
12.5-14.5
7.9-9.9

19-25
19-25
19-25

72-82
85-95
78-88

301-321
304-324
308-328

9-14
9-14
9-14

12-17
12-17
12-17

6.5-8.5
4.7-6.7
2.9-4.9

21-27
21-27
22-28

1.5
2.25
3

118-128
118-128
118-128

215-235
200-220
185-205

22-27
22-27
22-27

14-19
12-17
10-15

18.1-20.1
13.1-15.1
8.1-10.1

20-26
20-26
19-25

100-110
98-108
95-105

337-357
334-354
332-352

10-15
10-15
11-16

15-20
15-20
15-20

9.5-11.5
6.6-8.6
3.8-5.8

26-32
26-32
26-32

1.5
2.25
3

132-142
132-142
132-142

300-320
263-282
245-265

11-16
11-16
12-17

12-17
10-15
7-12

17.0-19.0
12.6-14.6
8.2-10.2

19-25
19-25
19-25

115-125
112-122
110-120

361-381
360-380
356-376

19-24
20-25
21-26

18-23
18-23
18-23

11.1-13.1
8.0-10.0
4.8-6.8

29-35
29-35
29-35

1.5
2.25
3

138-148
138-148
138-148

366-386
353-373
340-360

9-14
9-14
9-14

11-16
9-14
6-11

15.8-17.8
14.9-16.9
14.0-16.0

18-24
18-24
18-24

122-132
123-133
124-134

376-396
378-398
380-400

34-39
36-41
38-43

22-27
22-27
23-28

12.1-14.1
9.0-11.0
5.8-7.8

32-38
32-38
32-38

110

1.5
2.25
3

145-155
145-155
145-155

453-473
442-462
431-451

9-14
9-14
9-14

9-14
7-12
5-10

14.7-16.7
10.8-12.8
6.8-8.8

16-22
16-22
17-23

....
....
....

LEGEND
DB
HWG
--

----

Dry Bulb
Hot Water Generator
No Heating Operation

in This Temperature

Range

Table 23 -- 50PSH, PSV, PSD018 Typical Unit Operating Pressures and Temperatures
ENTERING
WATER
TEMP(F)

FULL LOAD COOLING
WATER
FLOW
(GPM/ton)

Suction

Discharge

-- WITHOUT

Super-

Sub-

Pressure(psig)Pressure(psig) heat(F) cooling(F)

HWG ACTIVE
Water
Temp
Rise(F)

FULL LOAD HEATING -- WITHOUT

Air Temp
Drop
(F) DB

Suction
Pressure
(psig)

Discharge
Pressure
(psig)

Superheat
(F)

Subcooling
(F)

HWG ACTIVE
Water
Temp
Drop
(F)

Air Temp
Rise
(F) DB

1.5
2.25
3

120-130
120-130
120-130

155-175
142-162
128-148

27-32
27-32
27-32

11-16
9-14
9-14

16.9-19.9
12.5-14.5
8.1-10.1

16-22
17-23
17-23

73- 83
75- 85
78- 88

268-288
270-290
272-292

8-13
8-13
8-13

4- 9
4- 9
4- 9

6.1- 8.1
4.4- 6.4
2.9- 4.9

15-21
16-22
16-22

1.5
2.25
3

137-147
137-147
137-147

220-240
206-226
192-212

16-21
16-21
16-21

10-15
8-13
8-13

17.0-19.0
12.6-14.6
8.4-10.4

16-22
17-23
17-23

102-112
106-116
110-120

295-315
297-317
299-319

8-13
8-13
8-13

9.1-11.1
6.9- 8.9
4.7- 6.7

20-26
21-27
21-27

1.5
2.25
3

142-152
142-152
142-152

287-307
273-239
259-279

7-12
7-12
7-12

10-15
8-13
8-13

15.9-17.9
11.8-13.8
7.8- 9.8

16-22
17-23
17-23

131-141
137-147
144-154

324-344
326-346
328-348

9-14
9-14
9-14

10-15
10-15
10-15

12.1-14.1
9.3-11.3
6.6- 8.6

25-33
26-34
26-34

1.5
2.25
3

146-156
146-156
146-156

375-395
361-381
347-367

6-11
6-11
6-11

10-15
8-13
8-13

14.9-16.9
11.0-13.0
7.2- 9.2

16-22
17-23
17-23

174-184
180-190
187-197

360-380
367-387
374-394

10-15
11-16
12-17

12-17
12-17
12-17

15.8-17.8
11.9-13.9
8.0-10.0

32-40
33-41
33-41

110

1.5
2.25
3

154-164
154-164
154-164

478-498
461-481
445-465

6-11
6-11
6-11

10-15
8-13
8-13

14.0-16.0
10.2-12.2
6.5- 8.5

16-22
16-22
16-22

......
......
......

LEGEND
DB
HWG
--

----

Dry Bulb
Hot Water Generator
No Heating Operation

in This Temperature

Range

Table 24 -- 50PSH, PSV, PSD024 Typical Unit Operating Pressures and Temperatures
FULL LOAD COOLING
ENTERING
WATER
TEMP
(F)

WATER
FLOW
(GPM/ton)

-- WITHOUT

Suction
Pressure
(psig)

Discharge
Pressure
(psig)

Superheat
(F)

Subcooling
(F)

HWG ACTIVE
Water
Air Temp
Temp
Drop
Rise
(F)
(F) DB

Discharge
Pressure
(psig)

Superheat
(F)

Subcooling
(F)

HWG ACTIVE
Water
Air Temp
Temp
Rise
Drop
(F) DB
(F)

1.5
2.25
3

115-125
115-125
115-125

154-174
141-161
127-147

40-45
40-45
40-45

8-13
6-11
6-11

16.5-18.5
12.1-14.1
77.7- 9.7

19-25
20-26
20-26

73- 83
75- 85
78- 88

283-303
285-305
287-307

8-12
8-12
8-12

6-11
6-11
6-11

5.9- 7.9
4.2- 6.2
2.7- 4.7

16-22
17-23
18-24

1.5
2.25
3

115-120
115-120
115-120

209-229
195-215
181-201

24-29
24-29
24-29

10-15
8-13
8-13

15.7-17.7
11.6-13.6
7.6- 9.6

18-24
18-24
18-24

102-112
106-116
110-120

313-333
314-334
316-336

8-12
8-12
8-12

8-13
8-13
8-13

8.9-10.9
6.7- 8.7
4.5- 6.5

22-28
23-29
23-29

1.5
2.25
3

136-146
136-146
136-146

275-295
261-281
247-267

6-11
6-11
6-11

6-11
5-10
4- 9

15.7-17.7
11.6-13.6
7.6- 9.6

18-24
18-24
18-24

128-138
134-144
141-151

340-360
342-362
344-364

9-14
9-14
9-14

11.3-13.3
8.5-10.5
5.8- 7.8

27-34
28-35
28-35

1.5
2.25
3

140-150
140-150
140-150

361-381
347-367
333-353

6-11
6-11
6-11

6-11
5-10
4- 9

14.9-16.9
11.0-13.0
7.2- 9.2

18-24
18-24
18-24

162-172
166-176
171-181

370-390
376-396
383-403

14-19
15-20
16-21

9-14
9-14
9-14

14.4-16.4
10.8-12.8
7.1- 9.1

32-40
34-42
34-42

110

1.5
2.25
3

144-154
144-154
144-154

460-480
445-465
428-448

6-11
6-11
6-11

6-11
4- 9
4- 9

13.9-15.9
10.2-12.2
6.5- 8.5

17-23
17-23
17-23

LEGEND
DB
HWG
--

FULL LOAD HEATING -- WITHOUT
Suction
Pressure
(psig)

----

Dry Bulb
Hot Water Generator
No Heating Operation

in This Temperature

Range

......
......
......

Table 25 -- 50PSH, PSV, PSD030 Typical Unit Operating Pressures and Temperatures
ENTERING
WATER

FULL LOAD COOLING -- WITHOUT
WATER
FLOW

Suction

Discharge

Super-

Sub-

Pressure(psig)Pressure(psig) heat(F) cooling(F)

HWG ACTIVE
Water
Temp
Rise(F)

FULL LOAD HEATING -- WITHOUT

Air Temp
Drop
(F) DB

Suction
Pressure
(psig)

Discharge
Pressure
(psig)

Superheat
(F)

Subcooling
(F)

HWG ACTIVE
Water
Temp
Drop
(F)

Air Temp
Rise
(F) DB

TEMP(F)

(GPM/ton)

1.5
2.25
3

116-126
115-125
115-125

146-166
138-158
128-148

27-32
27-32
27-32

7-13
6-11
6-11

19.6-21.6
14.3-16.3
8.0-10.0

16-22
17-23
17-23

69- 79
73- 83
76- 86

275-295
277-297
279-299

7-12
7-12
7-12

6-11
6-11
6-11

7.2- 9.2
5.4- 7.4
3.5- 5.5

16-22
17-23
17-23

1.5
2.25
3

129-139
128-138
128-138

217-237
203-223
189-209

12-17
12-17
12-17

6-11
5-10
5-10

20.8-22.8
15.0-17.0
9.2-11.2

17-23
18-24
18-24

96-106
100-110
105-115

300-320
304-324
309-329

10-15
10-15
10-15

9-14
9-14
9-14

10.5-12.5
7.6- 9.6
4.8- 6.8

21-27
22-28
22-28

1.5
2.25
3

132-142
131-141
131-141

293-313
274-294
256-276

9-14
9-14
9-14

6-11
5-10
5-10

20.1-22.1
14.4-16.4
8.6-10.6

17-23
18-24
18-24

123-133
129-139
135-145

327-347
333-353
339-359

11-16
11-16
11-16

13.2-15.2
9.8-11.8
6.4- 8.4

25-32
26-33
27-34

1.5
2.25
3

137-147
137-147
137-147

383-403
362-382
342-362

7-12
7-12
7-12

5-10
5-10
5-10

19.4-21.4
13.8-15.8
8.2-10.2

16-22
16-22
16-22

155-165
162-172
169-179

355-375
362-382
369-389

13-18
14-19
16-21

11-16
11-16
11-16

16.8-18.8
12.7-14.7
8.6-10.6

30-38
31-39
32-40

110

1.5
2.25
3

143-153
143-153
143-153

475-495
457-477
439-459

6-11
6-11
6-11

9-14
6-11
6-11

18.2-20.2
13.0-14.0
7.7- 9.7

16-22
16-22
16-22

......
......
......

LEGEND
DB
HWG
--

----

Dry Bulb
Hot Water Generator
No Heating Operation

in This Temperature

Range

Table 26 -- 50PSH, PSV, PSD036 Typical
FULL LOAD COOLING
ENTERING
WATER
TEMP
(F)

WATER
FLOW
(GPM/ton)

-- WITHOUT

Suction
Pressure
(psig)

Discharge
Pressure
(psig)

Superheat
(F)

Subcooling
(F)

Unit Operating Pressures and Temperatures

HWG ACTIVE
Water
AirTemp
Temp
Drop
Rise
(F) DB
(F)

FULL LOAD HEATING
Suction
Pressure
(psig)

-- WITHOUT

Discharge
Pressure
(psig)

Superheat
(F)

Subcooling
(F)

HWG ACTIVE
Water
AirTemp
Temp
Rise
Drop
(F) DB
(F)

1.5
2.25
3

117-127
116-126
116-126

142-162
134-154
124-144

33-38
33-38
33-38

8-14
7-12
7-12

19.1-21.1
13.8-15.8
7.4- 9.4

15-22
15-22
15-22

69- 79
73- 83
76- 86

276-296
278-298
280-300

10-15
10-15
10-15

7.2- 9.2
5.3- 7.3
3.5- 5.5

17-23
18-24
18-24

1.5
2.25
3

136-146
136-146
136-146

211-231
197-217
183-203

11-16
11-16
11-16

6-11
5-10
5-10

20.6-22.6
14.8-16.8
9.0-11.0

17-23
17-23
17-23

99-109
103-113
108-118

302-322
306-326
311-331

10-15
10-15
10-15

13-18
13-18
13-18

10.6-12.6
7.7- 9.7
5.0- 7.0

22-28
23-29
23-29

1.5
2.25
3

137-147
137-147
137-147

275-295
260-280
245-265

9-14
9-14
9-14

10-15
9-14
9-14

19.0-21.0
13.8-15.8
8.0-10.0

18-24
19-25
19-25

127-137
133-143
139-149

332-352
338-358
344-364

10-15
10-15
10-15

15-20
15-20
15-20

13.5-15.5
10.1-12.1
6.7- 8.7

27-34
28-35
29-36

1.5
2.25
3

142-152
142-152
142-152

373-393
352-372
332-352

7-12
8-13
8-13

10-15
6-11
6-11

19.5-21.5
13.9-15.9
8.3-10.3

17-23
17-23
17-23

164-174
172-182
181-191

365-385
372-392
379-399

11-16
11-16
12-17

15-20
15-20
15-20

17.4-19.4
13.2-15.2
9.0-11.0

34-42
35-43
36-44

110

1.5
2.25
3

147-157
147-157
147-157

467-487
448-468
430-450

6-11
6-11
6-11

10-15
8-13
7-12

16.2-18.2
11.9-13.9
7.6- 9.6

16-22
16-22
16-22

......
......
......

LEGEND
DB
HWG
--

----

Dry Bulb
Hot Water Generator
No Heating Operation

in This Temperature

Range

Table 27 -- 50PSH, PSV, PSD042 Typical
FULL LOAD COOLING
ENTERING
WATER
TEMP
(F)

WATER
FLOW
(GPM/ton)

-- WITHOUT

Suction
Pressure
(psig)

Discharge
Pressure
(psig)

Superheat
(F)

Subcooling
(F)
10-15
9-14
7-12

1.5
2.25
3

114-124
113-123
113-123

170-190
150-170
131-151

27-32
27-32
27-32

1.5
2.25
3

130-140
129-139
129-139

226-246
208-228
190-210

10-15
10-15
10-15

1.5
2.25
3

132-142
131-141
131-141

290-310
273-293
255-275

1.5
2.25
3

136-146
135-145
135-145

110

1.5
2.25
3

143-153
142-152
141-151

Unit Operating Pressures and Temperatures

HWG ACTIVE
Water
Air Temp
Temp
Drop
Rise
(F)
(F) DB

----

Dry Bulb
Hot Water Generator
No Heating Operation

Suction
Pressure
(psig)

Discharge
Pressure
(psig)

Superheat
(F)

Subcooling
(F)

HWG ACTIVE
Water
Air Temp
Temp
Rise
Drop
(F)
(F) DB

17.2-19.2
12.7-14.7
8.2-10.2

17-23
17-23
17-23

69- 79
72- 82
75- 85

286-306
289-309
292-312

5-10
5-10
6-11

5-10
6-11
6-11

4.5- 6.5
3.9- 5.9
3.2- 5.2

16-22
17-23
18-24

6-11
5-10
4- 9

17.8-19.8
13.3-15.3
8.8-10.8

20-26
20-26
20-26

100-110
105-115
110-120

315-335
322-342
330-350

7-12
8-13
10-15

6-11
6-11
7-12

9.0-11.0
7.0- 9.0
5.0- 7.0

22-28
23-29
24-30

6-11
6-11
6-11

6-11
5-10
4- 9

17.3-19.3
12.8-14.8
8.3-10.3

19-25
19-25
19-25

131-141
138-148
145-155

347-367
358-378
369-389

11-16
13-18
16-21

6-11
8-13
9-14

13.4-15.4
10.0-12.0
6.9- 8.9

29-35
30-36
31-37

370-390
350-370
330-350

6-11
6-11
6-11

6-11
5-10
4- 9

16.0-18.0
11.8-13.8
7.6- 9.6

17-23
17-23
17-23

175-185
177-187
180-190

393-413
401-421
409-429

19-24
20-25
22-27

7-12
9-14
12-17

17.6-19.6
13.2-15.2
8.7-10.7

36-42
37-43
38-44

469-489
448-468
427-447

6-11
6-11
6-11

6-11
5-10
4- 9

14.0-16.0
11.0-13.0
7.0- 9.0

16-22
16-22
16-22

LEGEND
DB
HWG
--

FULL LOAD HEATING -- WITHOUT

in This Temperature

Range

......
......
......

Table 28 -- 50PSH, PSV, PSD048 Typical Unit Operating Pressures and Temperatures
ENTERING
WATER
TEMP

(F)

FULL LOAD COOLING
WATER
FLOW
(GPM/ton)

-- WITHOUT

Suction
Pressure
(psig)

Discharge
Pressure
(psig)

Superheat
(F)

Subcooling
(F)

HWG ACTIVE

FULL LOAD HEATING -- WITHOUT

HWG ACTIVE

Water
Temp

Air Temp

Suction

Discharge

Super-

Sub-

Water
Temp

Rise
(F)

Drop
(F) DB

Pressure
(psig)

heat
(F)

cooling
(F)

Drop
(F)

Air Temp
Rise
(F) DB

1.5
2.25
3

108-118
107-117
107-117

180-200
161-181
142-162

27-32
28-33
29-34

12-17
10-15
9-14

19.8-21.8
14.8-16.8
9.8-11.8

19-25
19-25
19-25

65- 75
68- 78
72- 82

293-313
297-217
301-321

7-12
8-13
9-14

9-14
9-14
9-14

8.2-10.2
6.2- 8.2
4.2- 6.2

17-23
18-24
19-25

1.5
2.25
3

123-133
122-132
122-132

236-256
218-238
200-220

16-21
17-22
17-22

8-13
7-12
6-11

20.2-22.2
15.2-18.2
10.2-12.2

21-27
21-27
21-27

92-102
100-110
108-118

321-341
330-350
340-360

10-15
11-16
12-17

11-16
11-16
11-16

11.6-13.6
8.9-10.9
6.0- 8.0

23-29
24-30
26-32

1.5
2.25
3

130-140
129-139
129-139

305-325
285-305
265-285

10-15
11-16
11-16

8-13
6-11
5-10

20.0-22.0
15.0-17.0
10.0-12.0

20-26
20-26
20-26

122-132
133-143
144-154

353-373
365-385
378-398

12-17
14-19
16-21

11-16
11-16
11-16

15.0-17.0
11.5-13.5
8.0-10.0

29-35
31-37
33-39

1.5
2.25
3

133-143
132-142
132-142

390-410
368-388
345-365

8-13
9-14
9-14

8-13
6-11
5-10

19.0-21.0
14.0-16.0
9.0-11.0

19-25
19-25
19-25

166-176
173-183
181-191

397-417
407-727
417-437

16-21
18-23
19-24

9-14
9-14
10-15

19.5-21.5
14.7-16.7
9.9-11.9

37-43
38-44
40-46

110

1.5
2.25
3

141-151
140-150
140-150

497-517
472-492
447-467

6-11
7-12
8-13

8-13
6-11
5-10

18.0-20.0
13.5-15.5
8.7-10.7

18-24
18-24
18-24

......
......
......

LEGEND
DB
HWG
--

----

Dry Bulb
Hot Water Generator
No Heating Operation

in This Temperature

Range

Table 29 -- 50PSH, PSV, PSD060 Typical
ENTERING
WATER
TEMP

FULL LOAD COOLING
WATER
FLOW
(GPM/ton)

-- WITHOUT

Unit Operating Pressures and Temperatures

HWG ACTIVE

FULL LOAD HEATING -- WITHOUT

Water

HWG ACTIVE
Water

1.5
2.25
3

Suction
Pressure
(psig)
98-108
97-107
96-106

1.5
2.25
3

118-128
117-127
115-125

225-245
210-230
195-215

36-41
37-42
38-43

11-16
10-15
9-14

21.2-23.2
15.7-17.7
10.2-12.2

19-25
20-26
21-27

88- 98
94-104
100-110

306-326
311-331
317-337

10-15
10-15
11-16

8-13
8-13
9-14

11.0-13.0
8.3-10.3
5.5- 7.5

23-29
24-30
25-31

1.5
2.25
3

135-145
133-143
132-142

300-320
285-305
270-290

12-17
14-19
16-21

9-14
8-13
7-12

20.3-22.3
15.0-17.0
10.0-12.0

21-27
21-27
22-28

112-122
122-132
130-140

333-353
342-362
351-371

12-17
14-19
15-20

10-15
10-15
11-16

14.0-16.0
10.5-12.5
7.3- 9.3

28-34
30-36
32-38

1.5
2.25
3

139-149
138-148
138-148

390-410
370-390
350-370

8-13
8-13
8-13

7-12
6-11
6-11

19.3-21.3
14.3-16.3
9.3-11.3

20-26
21-27
21-27

147-157
154-164
160-170

369-389
377-397
385-405

15-20
18-23
19-24

10-15
10-15
11-16

17.7-19.7
13.4-15.4
9.0-11.0

36-42
37-43
38-44

110

1.5
2.25
3

144-154
143-153
142-152

488-508
468-488
448-468

8-13
7-12
7-12

8-13
6-11
5-10

18.4-20.4
13.6-15.6
8.8-10.8

21-27
21-27
21-27

(F)

Discharge
Pressure
(psig)
160-180
149-169
137-157

Superheat
(F)
40-45
41-46
42-48

Subcooling
(F)
12-17
12-17
11-16

Temp
Rise
(F)
20.0-22.0
14.3-16.3
8.5-10.5

Air Temp
Drop
(F) DB
19-25
19-25
20-26

Suction
Pressure
(psig)
62- 72
66- 76
70- 80

Discharge
Pressure
(psig)
276-296
280-300
284-304

Superheat
(F)
6-11
6-11
7-12

Subcooling
(F)
6-11
6-11
6-11

Temp
Drop
(F)
8.0-10.0
6.0- 8.0
4.0- 6.0

Air Temp
Rise
(F) DB
17-23
18-24
19-25

......
......
......

LEGEND
DB
HWG
--

----

Dry Bulb
Hot Water Generator
No Heating Operation

in This Temperature

Range

Table 30 -- 50PSH, PSV, PSD070 Typical
ENTERING
WATER
TEMP

(F)

FULL LOAD COOLING
WATER
FLOW
(GPM/ton)

-- WITHOUT

Suction
Pressure
(psig)

Discharge
Pressure
(psig)

Superheat
(F)

Subcooling
(F)

Unit Operating Pressures and Temperatures

HWG ACTIVE
Water
Temp
Rise
(F)

Suction
Pressure
(psig)

-- WITHOUT

Discharge
Pressure
(psig)

Superheat
(F)

Subcooling
(F)

HWG ACTIVE
Water
Temp
Drop
(F)

AirTemp
Rise
(F) DB

1.5
2.25
3

110-120
109-119
107-117

177-197
162-182
147-167

36-41
37-42
38-43

15-20
13-18
11-16

20.2-22.2
15.0-17.0
9.7-11.7

21-27
21-27
22-28

61- 71
65- 75
68- 78

290-310
292-312
296-316

12-18
12-18
12-18

9-14
10-15
10-15

8.0-10.0
6.0- 8.0
4.0- 6.0

19-25
20-26
21-27

1.5
2.25
3

128-138
128-138
127-137

246-266
228-248
210-230

18-23
19-24
20-25

11-16
9-14
6-11

21.0-23.0
15.6-17.6
10.2-12.2

22-28
23-29
24-30

88- 98
96-106
105-115

320-340
330-350
338-358

11-17
11-17
11-17

13-18
11-16
9-14

11.7-13.7
9.0-11.0
6.0- 8.0

26-32
27-33
29-35

1.5
2.25
3

134-144
133-143
131-141

305-325
289-309
273-293

9-14
9-14
9-14

11-16
9-14
6-11

20.8-22.8
15.4-17.4
10.0-12.0

23-29
23-29
23-29

118-128
130-140
141-151

355-375
368-388
380-400

10-16
12-18
15-21

14-19
13-18
11-16

15.2-17.2
11.7-13.7
8.0-10.0

33-39
35-41
37-43

1.5
2.25
3

140-150
139-149
138-148

390-410
373-393
355-375

10-15
10-15
10-15

11-16
9-14
6-11

19.6-21.6
14.5-16.5
9.3-11.3

22-28
22-28
22-28

158-168
168-178
178-188

401-421
412-432
423-443

9-15
10-16
12-18

13-18
12-17
12-17

19.5-21.5
14.8-16.8
10.0-12.0

41-47
43-49
45-51

110

1.5
2.25
3

144-154
143-153
142-152

488-508
468-488
448-468

10-15
10-15
9-14

9-14
6-11
5-10

18.4-20.4
13.6-15.6
8.8-10.8

20-27
20-27
20-27

LEGEND
DB
HWG
--

FULL LOAD HEATING

AirTemp
Drop
(F) DB

----

Dry Bulb
Hot Water Generator
No Heating Operation

in This Temperature

Range

......
......
......

Unit Start-Up

with WSHP

Open Controls

The WSHP Open is a multi-protocol
(default BACnet*) controller with extensive features, flexible options and powerful
capabilities. The unit comes from the factory pre-programmed
and needs minimal set up to function in a BAS (Building Automation System) system or provide additional capabilities to
Carrier's WSHP product line. Most settings on the controller
have factory defaults set for ease of installation. There are a
few settings that must be configured in the field and several settings that can be adjusted if required by unique job conditions.
Refer to Appendix A -- WSHP Open Screen Configuration. In
order to configure the unit, a BACvie_
display is required. See
Fig. 35.

To program the beginning
and end dates, scroll
down to the beginning month and press the enter
key. The softkeys (INCR and DECR) will activate
to increment
the month in either direction,
Jan,
Feb, March, etc.

Use number keys to select the day of month
year.
Push the OK softkey to finalize the data.

d.
6.

To view configuration

Select the Config softkey.

Select the Service Config softkey. Scroll through
the factory settings by using the up and down
arrow keys. See below for factory settings.
Only the following
settings
will need to be
checked.
# of Fan Speeds -- This should be set to "1" for
units with PSC motors and set to "3" for units with
ECM motors.
Compressor
Stages -- This should be set to "1."
Factory Dehumidification
Reheat Coil -This
should be set to "none" unless the modulating
hot
water reheat option is supplied in the unit, then set
to "installed."
The condenser
water limit needs to be verified
depending
on design parameters
and application,
whether geothermal
or boiler/tower.

•

When the unit is OFF, the SPY sensor will indicate OFF.
When power is applied, the SPY sensor will indicate temperarare in the space at 78 E

•
•

To start-up a unit with WSHP Open controls:

into a SPY
and tilt the
up into the
plug away

•

BACview 6 should respond with "Establishing
Connection." The Home screen will then appear on the display
showing operating mode and space temperature. Press
any button to continue.

See Appendix A -- WSHP Open Screen Configuration
for the hierarchal structure of the WSHP Open controller.
All functions of the controller can be set from the Home
screen.
3.

When the Login is requested, type 1111 and push the OK
softkey. The Logout will then be displayed to indicate the
password was accepted.

To set the Clock if it is not already displayed:

To view unit configuration

settings:

Select
Unit.

Scroll through the unit settings by using the up and
down arrow keys. Unit settings include:
Fan Mode: Default Continuous
Fan Delay:
Minimum SAT Cooling: Default 50 F
Maximum SAT Heating: Default 110 F
Filter Service Alarm: Must be set from 0 to 9999 hr

•
•
•
•
•
8.

settings:

NOTE: If the WSHP Open control has lost its programming,
all display pixels will be displayed on the SPY sensor. See the
WSHP Third Party Integration Guide.

1. To plug in the BACvieu_' handheld display
sensor, point the two ears on the connector up
bottom of the plug toward you. Insert the plug
SPY sensor while pushing the bottom of the
from you.

and

the Unit Configuration

softkey,

then select

To set local schedules:

Select System Settings
press Clockset.

from the Home screen, then

Select the Schedule softkey
screen, then press enter.

Scroll to hour, minute and second using the arrow
keys. Use the number keypad to set actual time.

Select Weekly,
available).

Scroll to day, month and year using
Use number keypad to set date.

Select day and press enter.

Press enter again and select ADD or DEL (DECR
or INCR) set schedule.

Enter ON/OFF

arrow

keys.

To set Daylight Savings Time (DST):
a.

Push the DST softkey. The display
02:00:060 which is equal to 2:00AM.

will indicate

Fig. 35 -- BACvievv s Display
*Sponsored by ASHRAE (AmericanSociety of Heating, Refrigerating and Air Conditioning Engineers).
40

Interface

then

press

from the Configuration
enter

time, then press continue.

schedules

f.
g-

10.

Press OK to apply
the week.

and save to a particular

day of

Continue to add the same or different schedule
cific days of the week.
To add exceptions to the schedule:
i. Press Add softkey.
ii. Select exception type from following:
• Date
• Date Range
• Week-N-Day
• Calender Reference

spe-

To avoid possible injury or death due to electrical shock,
open the power supply disconnect switch and secure it in
an open position before flushing system.

FIu sh ing E Once the piping is complete, units require final
purging and loop charging. A flush cart pump of at least 1.5 hp
is needed to achieve adequate flow velocity in the loop to purge
air and dirt particles from the loop. Flush the loop in both directions with a high volume of water at a high velocity. Follow the
steps below to properly flush the loop:

Go back to Home Screen.

1. Verify power is off.
2. Fill loop with water from hose through flush cart before
using flush cart pump to ensure an even fill. Do not allow
the water level in the flush cart tank to drop below the
pump inlet line in order to prevent air from filling the line.
3. Maintain a fluid level in the tank above the return tee in
order to avoid air entering back into the fluid.
4. Shutting off the return valve that connects into the flush
cart reservoir will allow 50 psig surges to help purge air
pockets. This maintains the pump at 50 psig.
5. To purge, keep the pump at 50 psig until maximum
pumping pressure is reached.
6. Open the return valve to send a pressure surge through
the loop to purge any air pockets in the piping system.
7. A noticeable drop in fluid level will be seen in the flush
cart tank. This is the only indication of air in the loop.

Remove BACvieu_ cable from SPT sensor by reversing
the process in Step 1.

11. Perform system test.

Flow Regulation

E Flow regulation
can be accomplished by two methods. Most water control valves have a flow
adjustment built into the valve. By measuring the pressure drop
through the unit heat exchanger, the flow rate can be determined. See Table 31. Adjust the water control valve until the
flow of 1.5 to 2 gpm is achieved. Since the pressure constantly
varies, two pressure
gages may be needed
in some
applications.

Table 31 -- 50PSH, PSV, PSD Coaxial
Water Pressure Drop
50PSH, PS_ PSD
UNIT SIZE

006

009

012

018

024

030

036

042

048

060

070

WATER
FLOW
(GPM)

WATER TEMPERATURE

(F)

3OF I S0F I 70F I 90F
Pressure

NOTE: If air is purged from the system while using a
10 in. PVC flush tank, the level drop will only be 1 to
2 in. since liquids are incompressible.
If the level drops
more than this, flushing should continue since air is still
being compressed in the loop. If level is less than 1 to
2 in., reverse the flow.

Drop (psi)

1.0
1.5

0.3
1.6

0.3
1.4

0.2
1.2

0.2
1.0

2.0
1.4

3.0
0.8

2.6
0.7

2.2
0.6

1.8
0.6

2.1
2.8

1.5
2.7

1.4
2.4

1.2
2.2

1.1
1.9

1.8
2.6

0.6
2.1

0.5
1.9

0.4
1.6

0.3
1.4

3.5
2.8

3.8
0.7

3.4
0.5

3.0
0.3

2.6
0.2

4.1
5.5

2.1
3.5

1.7
2.8

1.4
2.4

1.1
2.0

4.0
6.0

1.5
3.1

1.3
2.6

1.1
2.3

1.0
2.1

8.0
4.0

5.1
1.5

4.3
1.3

3.8
1.1

3.4
1.0

6.0
8.0

3.1
5.1

2.6
4.3

2.3
3.8

2.1
3.4

4.5
6.8

1.7
3.3

1.3
3.1

1.1
2.9

0.9
2.6

9.0
5.5

5.7
1.1

5.2
0.9

4.8
0.8

4.4
0.7

8.3
11.0

2.2
3.9

2.1
3.6

2.0
3.2

1.8
3.1

6.0
9.0

1.3
2.6

1.1
2.5

1.0
2.3

0.9
2.2

12.0
7.5

4.5
0.6

4.2
0.4

3.8
0.3

3.5
0.2

11.3
15.0

2.3
4.8

2.1
4.3

2.0
3.9

1.8
3.5

8.3
12.4

2.4
5.2

2.0
4.5

1.7
4.0

1.6
3.8

16.5

8.0

7.0

6.3

6.0

8. Repeat this procedure until all air is purged.
9. Restore power.
Antifreeze may be added before, during, or after the flushing process. However, depending on when it is added in the
process, it can be wasted. Refer to the Antifreeze section for
more detail.
Loop static pressure will fluctuate with the seasons. Pressures will be higher in the winter months than during the warmer months. This fluctuation is normal and should be considered
when charging the system initially. Run the unit in either
heating or cooling for several minutes to condition the loop to a
homogenous temperature.
When complete, perform a final flush and pressurize the
loop to a static pressure of 40 to 50 psig for winter months or
15 to 20 psig for smmner months.
After pressurization,
be sure to remove the plug from the
end of the loop pump motor(s) to allow trapped air to be
discharged and to ensure the motor housing has been flooded.
Be sure the loop flow center provides adequate flow through
the unit by checking pressure drop across the heat exchanger.
Compare the results to the data in Table 31.

Antifreeze-

In areas where entering loop temperatures
drop below 40 F or where piping will be routed through areas
subject to freezing, antifreeze is needed.
Alcohols and glycols are colranonly used as antifreeze
agents. Freeze protection should be maintained to 15 F below
the lowest expected entering loop temperature. For example, if
the lowest expected entering loop temperature is 30 F, the leaving loop temperature would be 22 to 25 E Therefore, the freeze
protection should be at 15 F (30 F - 15 F = 15 F).

An alternative method is to install a flow control device.
These devices are typically an orifice of plastic material designed to allow a specified flow rate that are mounted on the
outlet of the water control valve. Occasionally
these valves
produce a velocity noise that can be reduced by applying some
back pressure. To accomplish this, slightly close the leaving
isolation valve of the well water setup.
41

Units with Aquazone

IMPORTANT:
All alcohols
shouldbepre-mixed
and
pumped
froma reservoir
outsideof thebuildingor
introduced
underwaterleveltoprevent
fuming.

Table 32 -- Approximate Fluid Volume (gal.)
per 100 Ft of Pipe
PIPE

DIAMETER
1
1.25
1.5

Rubber

Hose

(in.)

2.8
4.5
8.0
10.9
18.0
8.3
10.9
17.0

----

Internal Pipe Size
Schedule
Standard Dimensional

NOTE: Volume

of heat exchanger

Ratio
is approximately

Table 33 -- Antifreeze Percentages by Volume
ANTIFREEZE

Methanol (%)
100% USP Food Grade
Propylene Glycol (%)
Ethanol (%)

Cooling Tower/Boiler

start

HEATING STAGE 1--Terminal
Y is active in heating
stage 1. After power up, the first call to the compressor will
initiate a 5 to 80 second random start delay and a 5-minute
anti-short cycle protection time delay. After both delays are
complete, the compressor is energized.
compressor

calls the random

start

EMERGENCY
HEAT -- In Emergency Heat mode, terminal
W is active while terminal Y is not. Terminal G must be active
or the W terminal is disregarded. EH1 is ilmnediately turned
on. EH2 will turn on after 5 minutes of continual emergency
heat demand.

FOR
(F)
25

Units with Aquazone

Deluxe

D Control

EXTENDED
COMPRESSOR
OPERATION MONITOR -If the compressor has been on for 4 continuous hours the control will automatically turn off the compressor relay and wait
the short cycle time protection time. All appropriate safeties,
including the low-pressure
switch, will be monitored. If all
operations are normal and the compressor
demand is still
present, the control will turn the compressor back on.

Systems -- These systems

typically use a common loop temperature maintained at 60 to
95 F. Carrier recommends
using a closed circuit evaporative
cooling tower with a secondary heat exchanger between the
tower and the water loop. If an open type cooling tower is used
continuously, chemical treatment and filtering will be necessary.

STANDBY/FAN
ONLY -- The compressor will be off. The
Fan Enable, Fan Speed, and reversing valve (RV) relays will be
on if inputs are present. If there is a Fan 1 demand, the Fan
Enable will ilmnediately turn on. If there is a Fan 2 demand,
the Fan Enable and Fan Speed will hmnediately turn on.

Ground Coupled, Closed Loop and Plateframe
Heat Exchanger Well Systems -- Thesesystemsallow water temperatures from 30 to ll0 F. The external loop
field is divided
lines. Each line
system start-up,
only the system
tem prior to the

calls the random

LOCKOUT WITH EMERGENCY HEAT -- While in Lockout mode, if W becomes active, then Emergency Heat mode
will occur.

1.0 gallon.

MINIMUM TEMPERATURE
FREEZE PROTECTION
10
15
20

compressor

NOTE: EH2 will not turn on (or if on, will turn ot_ ifFP1 temperature is greater than 45 F and FP2 is greater than 110 E
LOCKOUT MODEThe status LED will flash fast in
Lockout mode and the compressor relay will be turned off
immediately. Lockout mode can be "soft" reset via the Y input
or can be "hard" reset via the disconnect. The last fault causing
the lockout is stored in memory and can be viewed by entering
test mode.

LEGEND
IPS
SCH
SDR

NOTE: On all subsequent
delay is omitted.

HEATING STAGE 2 -- To enter Stage 2 mode, terminal W is
active (Y is already active). Also, the G terminal must be
active or the W terminal is disregarded. The compressor relay
will remain on and EH1 is ilmnediately turned on. EH2 will
turn on after 10 minutes of continual stage 2 demand.

3.9

3/4 IPS SDR11
1 IPS SDR11
11/4 IPS SDR11
1/2 IPS SDR11
2 IPS SDR11
11/4 IPS SCH40
11/2 IPS SCH40
2 IPS SCH40

C Control

COOLING -- Y and O terminals are active in Cooling mode.
After power up, the first call to the compressor will initiate a
5 to 80 second random start delay and a 5-minute anti-short
cycle protection time delay. After both delays are complete, the
compressor is energized.

NOTE: On all subsequent
delay is omitted.

VOLUME (gal.)
4.1
6.4
9.2

Polyethylene

Complete

STANDBYY and W terminals are not active in Standby
mode, however the O and G terminals may be active, depending on the application. The compressor will be off.

Calculate
thetotalvolume
offluidinthepipingsystem.
See
Table
32.Usethepercentage
byvolume
inTable33todeterminetheamount
ofantifreeze
touse.Antifreeze
concentration
should
bechecked
fromawell-mixed
sample
usingahydrometertomeasure
specific
gravity.
FREEZE
PROTECTION
SELECTION
-- The 30F FP1
factory
setting
(water)
should
beusedtoavoidfreeze
damage
totheunit.
Onceantifreeze
isselected,
theJW3jumper(FP1)should
beclipped
onthecontrol
toselect
thelowtemperature
(antifreeze
13F)setpointtoavoidnuisance
faults.

Copper

up into 2 in. polyethylene supply and return
has valves connected in such a way that upon
each line can be isolated for flushing using
pumps. Locate air separation in the piping sysfluid re-entering the loop field.

NOTE: DIP switch 5 on S1 does not have an effect upon Fan 1
and Fan 2 outputs.
HEATING STAGE 1 -- In Heating Stage 1 mode, the Fan
Enable and Compressor
relays are turned on ilmnediately.
Once the demand is removed, the relays are turned off and the
control reverts to Standby mode. If there is a master/slave or
dual compressor application, all compressor relays and related
functions will operate per their associated DIP switch 2 setting
on S1.

OPERATION

Power

Up Mode _ The unit will not operate until all the
inputs, terminals and safety controls are checked for normal
operation.
NOTE: The compressor will have a 5-minute anti-short cycle
upon power up.

HEATING STAGE 2In Heating Stage 2 mode, the Fan
Enable and Compressor relays are remain on. The Fan Speed
relay is turned on ilmnediately
and turned off immediately
once the demand is removed. The control reverts to Heating
Stage 1 mode. If there is a master/slave
or dual compressor
42

application,
allcompressor
relaysandrelatedfunctions
will
operate
pertheirassociated
DIPswitch
2 setting
onS1.
HEATING
STAGE
3- In Heating
Stage
3 mode,theFan
Enable,
FanSpeed
andCompressor
relays
remain
on.TheEH1
output
isturned
onhmnediately.
Withcontinuing
HeatStage
3
demand,
EH2will turnonafter10minutes.
EH1andEH2are
turned
offilranediately
whentheHeating
Stage
3demand
isremoved.
Thecontrol
reverts
toHeating
Stage
2mode.
Theoutput
signal
EH2willbeoffifFP1isgreater
than45F
ANDFP2(when
shorted)
isgreater
than110FduringHeating
Stage3 mode.This conditionwill havea 30-second
recognition
time.Also,duringHeating
Stage
3 mode,EH1,
EH2,FanEnable,
andFanSpeed
willbeONif Ginputis not
active.
EMERGENCY
HEAT-- InEmergency
Heatmode,
theFan
Enable
andFanSpeed
relays
areturned
on.TheEH1output
is
turned
onilmnediately.
Withcontinuing
Emergency
Heatdeman&EH2will turnonafter5minutes.
FanEnable
andFan
Speed
relays
areturned
offaftera60-second
delay.
Thecontrol
reverts
toStandby
mode.
Output
EH1,EH2,FanEnable,
andFanSpeed
willbeONif
theGinputisnotactive
during
Emergency
Heatmode.
COOLING
STAGE
1-- In CoolingStage1 mode,theFan
Enable,
compressor
andRVrelays
areturned
onilranediately.
If configured
asstage
2(DIPswitch
settoOFF)thenthecompressor
andfanwill notturnonuntilthereisastage
2demand.
The Fan Enable and compressor relays are turned off ilranediately when the Cooling Stage 1 demand is removed. The control reverts to Standby mode. The RV relay remains on until
there is a heating demand. If there is a master/slave
or dual
compressor application, all compressor relays and related functions will track with their associated DIP switch 2 on S1.

Units

with WSHP

Open

Multiple

Protocol

The WSHP Open multi-protocol
controller will control mechanical cooling, heating and waterside economizer outputs
based on its own space temperature input and set points. An
optional CO2 IAQ (indoor air quality) sensor mounted in the
space can maximize the occupant comfort. The WSHP Open
controller has its own hardware clock that is automatically set
when the heat pump software is downloaded to the board. Occupancy types are described in the scheduling section below.
The following sections describe the functionality of the WSHP
Open multi-protocol controller. All point objects referred to in
this sequence of operation will be referenced to the objects as
viewed in the BACview 6 handheld user interface.

NOTE: This point must be enabled in order for the i-Vu Open,
Field Assistant, or BACview 6 control system to assign a time
schedule to the controller.

with HWR Option

FAN ONLY--A
(G) call from the thermostat
to the (G)
terminal of the Deluxe D control board will bring the unit
on in fan only mode.

Schedule
schedule -- The unit will operate according to the
schedule configured
and stored in the unit. The schedule is
accessible via the BACview 6 Handheld tool, i-Vu Open, or
Field Assistant control system. The daily schedule consists of a
start/stop time (standard or 24-hour mode) and seven days of
the week, starting with Monday and ending on Sunday. To
enter a daily schedule, navigate to Config, then Sched, then
enter BACview 6 Admin
Password
(1111), then go to
schedule schedule. From here, enter either a Weekly or Exception schedule for the unit.

COOLING
STAGE 1--A
simultaneous
call from (G),
(Y1), and (O) to the (G), (Y1), (O/W2) terminals
of the
Deluxe D control board will bring the unit on in Cooling
Stage 1.
COOLING
STAGE2--A
simultaneous
call from (G),
(Y1), (Y2), and (O) to the (G), (Y1), (Y2), and (O/W2) terminals of the Deluxe D control board will bring the unit on
in Cooling Stage 2. When the call is satisfied at the thermostat the unit will continue to mn in Cooling Stage 1 until the
Cooling Stage 1 call is removed or satisfied, shutting down
the unit.
cooling

NOTE: Cooling
always overrides
Reheat mode. In the
Cooling mode, the unit cools and dehumidifies.
If the cooling thermostat
is satisfied but there is still a call for dehumidification,
the unit will continue to operate in Reheat
mode.

Occupancy
Schedules -- The controller will be occupied 24/7
until a time schedule has been configured using either Field
Assistant, i-Vu Open, BACview 6 or a third party control system
to enable/disable the BAS on!off point. The BAS point can be
disabled by going to Config, then Unit, then Occupancy Schedules and changing the point from enable to disable then clicking OK.

NIGHT LOW LIMIT (NLL) STAGED HEAT1NG -- In NLL
staged Heating mode, the override (OVR) input becomes active and is recognized as a call for heating and the control will
ilranediately go into a Heating Stage 1 mode. With an additional 30 minutes of NLL demand, the control will go into Heating
Stage 2 mode. With another additional 30 minutes of NLL
demand, the control will go into Heating Stage 3 mode.

NOTE: Not all units have two-stage

NOTE: Not all units have two-stage heating functionality.
REHEAT MODE -- A call from the humidistat/dehumidistat to the (H) terminal of the Deluxe D control board will
bring the unit on in Reheat mode if there is no call for cooling at the thermostat. When the humidistat/dehumidistat
call
is removed or satisfied the unit will shut down.

SCHEDULINGScheduling is used to start!stop the unit
based on a time period to control the space temperature to specified occupied heating and cooling set points. The controller is
defaulted to control by occupied set points all the time, until either a time schedule is configured with BACview 6, Field Assistant, i-Vu _R:Open, or a third party control system to enable/disable the BAS (Building Automation System) on!offpoint. The
local time and date must be set for these functions to operate
properly. The occupancy source can be changed to one of the
following:

COOLING
STAGE 2In Cooling Stage 2 mode, the Fan
Enable, compressor and RV relays remain on. The Fan Speed
relay is turned on ilranediately
and turned off ilmnediately
once the Cooling Stage 2 demand is removed. The control
reverts to Cooling Stage 1 mode. If there is a master/slave or
dual compressor application, all compressor relays and related
functions will track with their associated DIP switch 2 on S1.

Units

D control board will bring the unit on in Heating Stage 2.
When the call is satisfied at the thermostat the unit will continue to run in Heating Stage 1 until the call is removed or
satisfied, shutting down the unit.

Occupancy Input Contact -- The WSHP Open controller has
the capability to use an external dry contact closure to determine the occupancy status of the unit. The Occupancy Schedules will need to be disabled in order to utilize the occupancy
contact input.

functionality.

HEAT1NG STAGE 1--A
simultaneous
call from (G) and
(Y1) to the (G) and (Y1) terminals of the Deluxe D control
board will bring the unit on in Heating Stage 1.

NOTE: Scheduling

can only be controlled

from one source.

BAS (Building Automation System) On/Off
-A BAS
system that supports network scheduling can control the unit
through a network colmnunication
and the BAS scheduling
function once the Occupancy Schedules have been disabled.

HEAT1NG STAGE 2 --A simultaneous
call from (G), (Y1),
and (Y2) to the (G), (Y1), and (Y2) terminals of the Deluxe
43

NOTE:Scheduling
caneitherbecontrolled
viatheunitorthe
BAS,butnotboth.
INDOOR
FAN-- Theindoorfanwill operate
in anyoneof
three
modes
depending
ontheuserconfiguration
selected.
Fanmodecanbeselected
asAuto,Continuous,
orAlways
On.InAutomode,
thefanis inintermittent
operation
during
bothoccupied
andunoccupied
periods.
Continuous
fanmode
isintermittent
duringunoccupied
periods
andcontinuous
duringoccupied
periods.
AlwaysOnmodeoperates
thefancontinuously
duringbothoccupied
andunoccupied
periods.
Inthe
default
mode,
Continuous,
thefanwillbeturned
onwhenever
anyoneofthefollowing
istrue:
• Theunitis inoccupied
modeasdetermined
byitsoccupancy
status.
• Thereis ademand
forcoolingorheating
intheunoccupiedmode.
• Thereisacallfordehumidification
(optional).
When
power
isreapplied
afterapower
outage,
therewillbe
aconfigured
timedelayof5to600seconds
before
starting
the
fan.Therearealsoconfigured
fandelays
forFanOnandFan
Off.TheFanOndelaydefines
thedelaytime(0to30seconds;
default10)before
thefanbegins
to operate
afterheating
or
cooling
is started
whiletheFanOffdelaydefines
thedelay
time(0to180seconds;
default
45)thefanwillcontinue
tooperate
afterheating
orcooling
isstopped.
Thefanwillcontinue
torunaslongasthecompressors,
heating
stages,
orthedehumidification
relays
areon.If theSPTfailurealarmorcondensateoverflow
alarmisactive;
thefanwillbeshutdownilrnnediately
regardless
ofoccupancy
state
ordemand.

•

Automatic Fan Speed Control -- The WSHP Open controller
is capable of controlling up to three fan speeds using the ECM
(electronically colmnutated motor). The motor will operate at
the lowest speed possible to provide quiet and efficient fan operation with the best latent capability. The motor will increase
speed if additional cooling or heating is required to obtain the
desired space temperature set point. The control increases the
motor's speed as the space temperature rises above the cooling
or below the heating set point. The amount of space temperarare increase above or below the set point required to increase
the fan speed is user configurable in the set point. Also, the
control will increase the fan speed as the supply-air temperarare approaches the configured minhnum or maximum limits.

There is a 5-minute offtime for the compressor as well as a
5-minute time delay when staging up to allow the SAT to
achieve a stable temperature before energizing a second stage
of capacity. Likewise, a 45-second delay is used when staging

•

If all the above conditions are met, the compressors will be
energized as required, otherwise they will be deenergized.
If
cooling is active and should the SAT approach the lninimum
SAT limit, the fan will be indexed to the next higher speed.
Should this be insufficient and if the SAT falls further (equal to
the minimum SAT lhnit), the fan will be indexed to the maximum speed. If the SAT continues to fall 5 c F below the mini1hum SAT lhnit, all cooling stages will be disabled.
During Cooling mode, the reversing valve output will be
held in the cooling position (either B or O type as configured)
even after the compressor is stopped. The valve will not switch
position until the Heating mode is required.
The configuration
screens contain the minimum
SAT
parameter as well as cooling lockout based on outdoor-air
temperature
(OAT) Both can be adjusted to meet various
specifications.

After a compressor is staged off, it may be restarted again
after a normal time-guard period of 5 minutes and if the supply-mr temperature has increased above the minimum supplyair temperature limit.
The WSHP Open controller provides a status input to monitor the compressor operation. The stares is monitored to determine if the compressor status matches the colrnnanded state.
This input is used to determine if a refrigerant safety switch or
other safety device has tripped and caused the compressor to
stop operating normally. If this should occur, an alarm will be
generated to indicate the faulted compressor condition.
HEATING -- The WSHP Open controller will operate one or
two stages of compression to maintain the desired heating set
point. The compressor outputs are controlled by the heating PI
(proportional-integral)
loop and heating stages capacity algorithin. They will be used to calculate the desired number of
stages needed to satisfy the space by comparing the space temperature (SPT) to the appropriate heating set point. The following conditions must be true in order for the heating algorithin to
run:

Fan Speed Control (During Cooling) -- Whenever mechanical cooling is required and active, the control continuously
monitors the supply-air temperature to verify it does not fall below the configured minimum cooling SAT limit (50 F default).
As the SAT approaches this value, the control will increase the
fan speed as required to ensure the SAT will remain within the
limit. The fan will operate at lowest speed to maximize latent
capacity during cooling.

•
•
•
•

COOLING -- The WSHP Open controller will operate one or
two stages of compression to maintain the desired cooling set
point. The compressor outputs are controlled by the PI (proportional-integral)
cooling loop and cooling stages capacity algorithin. They will be used to calculate the desired number of
stages needed to satisfy the space by comparing the space temperature (SPT) to the appropriate cooling set point. The water
side economizer, if applicable, will be used for first stage cooling in addition to the compressor(s). The following conditions
must be true in order for the cooling algorithin to run:
Cooling

•
•

down.

Fan Speed Control (During Heating) -- Whenever heat is required and active, the control continuously monitors the supply-mr temperature to verify it does not rise above the configured maximum heating SAT limit (110 F default). As the SAT
approaches this value, the control will increase the fan speed as
required to ensure the SAT will remain within the limit. This
feature provides the most quiet and efficient operation by operating the fan at the lowest speed possible.

•

•
•

Heating mode is not active and the compressor
time
guard has expired.
Condensate overflow input is normal.
If occupied, the SPT is greater than the occupied cooling
set point.
Space temperature reading is valid.
If unoccupied,
the SPT is greater than the unoccupied
cooling set point.
If economizer
cooling is available
and active and the
economizer alone is insufficient to provide enough cooling.
OAT (if available)
is greater than the cooling lockout
temperature.

•
•
•

Heating is set to Enable.
Cooling mode is not active and the compressor
time
guard has expired.
Condensate overflow input is normal.
If occupied, the SPT is less than the occupied heating set
point.
Space temperature reading is valid.
If unoccupied,
the SPT is less than the unoccupied
heating set point.
OAT (if available)
is less than the heating
lockout
temperature.

If all the above conditions are met, the heating outputs will
be energized as required, otherwise they will be deenergized. If
the heating is active and should the SAT approach the maxi1hum SAT lhnit, the fan will be indexed to the next higher

is set to Enable.
44

speed.
Should
thisbeinsufficient,
andtheSATrisesfurther
reaching
themaximum
heating
SATlimit,thefanwill be
indexed
tothemaxhnum
speed.
If theSATstillcontinues
to
rise5cFabove
themaximum
limit,allheating
stages
will be
disabled.
DuringHeating
mode,
thereversing
valveoutputwill be
heldintheheating
position
(either
BorOtypeasconfigured)
even
afterthecompressor
isstopped.
Thevalvewillnotswitch
position
untiltheCooling
mode
isrequired.
Theconfiguration
screens
containthe maximumSAT
parameter
aswellasheating
lockoutbasedonoutdoor-air
temperature
(OAT);bothcanbe adjusted
to meetvarious
specifications.
There
is a5-minute
offthneforthecompressor
aswellasa
5-minute
timedelaywhenstaging
upto allowtheSATto
achieve
astable
temperature
before
energizing
asecond
stage
ofcapacity.
Likewise,
a45-second
delayisusedwhenstaging
down.

After a compressor is staged off, it may be restarted again
after a normal time-guard period of 5 minutes and if the supply-mr temperature has fallen below the maximum supply air
temperature limit.
The WSHP Open controller provides a status input to monitor the compressor operation. The stares is monitored to determine if the compressor status matches the colmnanded state.
This input is used to determine if a refrigerant safety switch or
other safety device has tripped and caused the compressor to
stop operating normally. If this should occur, an alarm will be
generated to indicate the faulted compressor condition. Also, if
auxiliary heat is available (see below), the auxiliary heat will
operate to replace the reverse cycle heating and maintain the
space temperature as required.

INDOOR AIR QUALITY
(IAQ) AND DEMAND
CONTROLLED VENTILATION
(DCV) -- If the optional indoor air quality sensor is installed, the WSHP Open controller
can maintain indoor air quality via a modulating OA damper
providing demand controlled ventilation. The control operates
the modulating OA damper during occupied periods. The control monitors the CO2 level and compares it to the configured
set points, adjusting the ventilation rate as required. The control
provides proportional ventilation to meet the requirements
of
ASHRAE (American Society of Heating, Refrigerating
and
Air Conditioning Engineers) specifications by providing a base
ventilation rate and then increasing the rate as the CO2 level increases. The control will begin to proportionally
increase ventilation when the CO 2 level rises above the start ventilation set
point and will reach the full ventilation rate when the CO2 level
is at or above the maxhnum set point. A user-configurable
minimum damper position ensures that proper base ventilation is
delivered when occupants are not present. The IAQ configurations can be accessed through the configuration screen. The
following conditions must be true in order for this algorithn to
run:
•
•
•

AUXILIARY
HEAT -- The WSHP Open controller can control a two-position, modulating water, or steam valve connected to a coil on the discharge side of the unit and supplied by a
boiler or a single-stage ducted electric heater in order to maintain the desired heating set point. Should the compressor capacity be insufficient or a compressor failure occurs, the auxiliary
heat will be used. Unless the compressor fails, the auxiliary
heat will only operate to supplement the heat provided by the
compressor if the space temperature falls more than one degree
below the desired heating set point (the amount is configurable). The heat will be controlled so the SAT will not exceed
the maximum heating SAT lhnit.

Damper control is configured for DCV.
The unit is in an occupied mode.
The IAQ sensor reading is greater than the DCV
control set point.

start

The control has four user adjustable set points: DCV start
control set point, DCV maximum control set point, minimum
damper position, and DCV maximum damper position.
Two-Position
OA Damper -- The control can be configured
to operate a ventilation damper in a two-position ventilation
mode to provide the minimum ventilation requirements during
occupied periods.
DEHUMIDIFCATIONThe WSHP Open controller will
provide occupied and unoccupied
dehumidification
only on
units that are equipped with the modulating hot water reheat
(HWR) option. This function requires an accessory space relative humidity sensor. When using a relative humidity sensor to
control dehumidification
during occupied or unoccupied times,
the dehumidification
set points are used accordingly. When the
indoor relative humidity becomes greater than the dehumidification set point, a dehumidification
demand will be acknowledged. Once acknowledged, the dehumidification
output will
be energized, bringing on the supply fan (medium speed), mechanical cooling, and the integral hot water reheat coil. The
controls will engage Cooling mode and waste heat from the
compressor cooling cycle will be returned to the reheat coil simultaneously, meaning that the reversing valve is causing the
compressor to operate in the Cooling mode. During Cooling
mode, the unit cools, dehumidifies, and disables the HWR coil;
however, once the call for cooling has been satisfied and there
is still a call for dehumidification,
the unit will continue to operate using the Reheat mode and HWR coil.

Auxiliary
Modulating
Hot Water/Steam
Heating Reheat
-- The control can modulate a hot water or steam valve connected to a coil on the discharge side of the unit and supplied
by a boiler in order to maintain the desired heating set point
should the compressor capacity be insufficient or a compressor
failure occurs. Unless a compressor fault condition exists, the
valve will only operate to supplement the heat provided by the
compressor if the space temperature falls more than one degree
below the desired heating set point. The valve will be controlled so the SAT will not exceed the maximum heating SAT
limit.
Two-Position
Hot Water/Steam
Heating Reheat -- The control can operate a two-position, NO or NC, hot water or steam
valve connected to a coil on the discharge side of the unit and
supplied by a boiler in order to maintain the desired heating set
point should the compressor capacity be insufficient or a compressor failure occurs. Unless a compressor fault condition exists, the valve will only open to supplement the heat provided
by the compressor if the space temperature falls more than one
degree below the desired heating set point. The valve will be
controlled so the SAT will not exceed the maximum heating
SAT lhnit. The heat stage will also be subject to a 2-minute
minimum OFF time to prevent excessive valve cycling.
Single Stage Electric
erate a field-installed

the discharge side of the unit in order to maintain the desired
heating set point should the compressor capacity be insufficient
or a compressor failure occurs. Unless a compressor fault condition exists, the heat stage will only operate to supplement the
heat provided by the compressor if the space temperature falls
more than one degree below the desired heating set point. The
heat stage will be controlled so the SAT will not exceed the
maximum heating SAT limit. The heat stage will also be subject to a 2-minute minimum OFF time to prevent excessive
cycling.

WATERSIDE ECONOMIZER
-- The WSHP Open controller has the capability of providing modulating or two-position
water economizer operation (for a field-installed economizer
coil mounted to the entering air side of the unit and connected
to the condenser water loop) in order to provide free cooling
(or preheating) when water conditions are optimal. Water economizer settings can be accessed through the equipment status

Auxiliary_ Heat -- The control can opsingle stage of electric heat installed on
45

screen.
Thefollowing
conditions
mustbetrueforeconomizer
operation:
• SATreading
isavailable.
• LWTreading
isavailable.
• If occupied,
theSPTisgreater
thantheoccupied
cooling
setpointorlessthantheoccupied
heating
setpointand
thecondenser
wateris suitable.
• Space
temperature
reading
isvalid.
• If unoccupied,
theSPTis greater
thantheunoccupied
coolingsetpointor lessthantheunoccupied
heating
set
pointandthecondenser
wateris suitable.
Modulating Water Economizer
Control -- The control has
the capability to modulate a water valve to control condenser
water flowing through a coil on the entering air side of the unit.
(_oling -- The purpose is to provide an economizer cooling
function by using the water loop when the entering water loop
temperature is suitable (at least 5 c F below space temperature).
If the water loop conditions are suitable, then the valve will
modulate open as required to maintain a supply-air temperature
that meets the load conditions. Should the economizer coil capacity alone be insufficient for a period greater than 5 minutes,
or should a high humidity condition occur, then the compressor
will also be started to satisfy the load. Should the SAT approach the minimum cooling SAT limit, the economizer valve
will modulate closed during compressor operation.

controller (UC) open loop controller. Loop pump operation is
automatically
controlled
by WSHP equipment
occupancy
schedules, unoccupied demand and tenant override conditions.
Positive pump status feedback prevents nuisance fault trips.
The condenser water linkage operates when a request for condenser water pump operation is sent from each WSHP to the
loop controller. This request is generated whenever any WSHP
is scheduled to be occupied, is starting during optimal start (for
warm-up
or pull down prior to occupancy),
there is an
unoccupied heating or cooling demand, or a tenant pushbutton
ovemde. At each WSHR the water loop temperature and the
loop pump status is given. The WSHP will NOT start a compressor until the loop pumps are running or will shutdown the
compressors should the pumps stop. This prevents the WSHP
from operating without water flow and thus tripping out on refrigerant pressure, causing a lockout condition. The WSHP
Open controller control will prevent this from occumng. Also,
the loop controller can be configured to start the pumps only
after a configurable number of WSHPs are requesting operation (from 1-"N"). This can be used to prevent starting the entire loop operation for only one WSHR Meanwhile,
the
WSHPs will not operate if the loop pump status is off and
therefore the WSHP compressor will not run.

COMPLETE

HeatingAdditionally, the control will modulate the water
valve should the entering water loop temperature be suitable
for heating (at least 5 c F above space temperature) and heat is
required. The valve will be controlled in a similar manner except to satisfy the heating requirement. Should the economizer
coil capacity alone be insufficient to satisfy the space load conditions for more than 5 minutes, then the compressor will be
started to satisfy the load. Should the SAT approach the maximum heating SAT lhnit, the economizer valve will modulate
closed during compressor operation.
Two-Position
Water Economizer
Control -- The control has
the capability to control a NO or NC, two-position water valve
to control condenser water flow through a coil on the entering
air side of the unit.

C AND DELUXE
SYSTEM TEST

D BOARD

Test mode provides the ability to check the control operation in a thnely manner. The control enters a 20-minute test
mode by momentarily shorting the test terminals. All time delays are sped up 15 times. The follow operations are colmnon
to both Complete C and Deluxe D controls.

Test Mode

-- To enter Test mode, cycle the power 3 times
within 60 seconds. The LED will flash a code representing the
last fault when entering the Test mode. The alarm relay will
also power on and offduring Test mode. See Tables 34 and 35.
To exit Test mode, short the terminals for 3 seconds or cycle
the power 3 times within 60 seconds.
NOTE: The flashing code and alarm relay cycling code will
both have the same numerical label. For example, flashing
code 1 will have an alarm relay cycling code 1. Code 1 indicates the control has not faulted since the last power off to
power on sequence.

(_oling -- The purpose is to provide a cooling economizer
function directly from the condenser water loop when the entering water loop temperature is suitable (at least 5 c F below
space telnperature). If the optional coil is provided and the water loop conditions are suitable, then the valve will open to provide cooling to the space when required. Should the capacity
be insufficient for a period greater than 5 minutes, or should a
high humidity condition occur, then the compressor will be
started to satisfy the load. Should the SAT reach the minimum
cooling SAT limit, the economizer valve will close during
compressor operation.

Table 34 -- Complete C Control Current LED
Status and Alarm Relay Operations
LED STATUS

DESCRIPTION OF OPERATION
Normal Mode

off
Slow Flash
Fast Flash

Heating -- Additionally, the economizer control will open the
water valve should the entering water loop temperature be suitable for heating (at least 5 c F above space temperature) and
heat is required. The valve will be controlled in a similar manner except to satisfy the heating requirement.
Should the coil
capacity be insufficient to satisfy the space load for more than
5 minutes, then the compressor will be started to satisfy the
load. Should the SAT reach the maximum heating SAT limit,
the economizer valve will close during compressor operation.

RELAY

Open

Normal Mode with PM Warning

Cycle (closed 5 sec,
open 25 sec.)

Complete C Control is non-functional

Open

Fault Retry
Lockout

Open
Closed

Slow Flash

DEMAND LIMITThe WSHP Open controller has the
ability to accept three levels of demand lhnit from the network.
In response to a demand lhnit, the unit will decrease its heating
set point and increase its cooling set point to widen the range in
order to ilmnediately lower the electrical demand. The amount
of temperature adjustment in response is user adjustable for
both heating and cooling and for each demand level. The response to a particular demand level may also be set to zero.

ALARM

Over/Under

Voltage

Shutdown

Flashing

Code

Test Mode

Flashing

Code 2

Test Mode

-- HP Fault in memory

Flashing

Code 3

Test Mode --

Flashing

Code

Flashing

Code

Open, (Closed after
15 minutes)

No fault in memory

Cycling

Code

Cycling

Code

LP Fault in memory

Cycling

Code

Test Mode --

FP1 Fault in memory

Cycling

Code

Test Mode --

FP2 Fault in memory

Cycling

Code

Flashing

Code 6

Test Mode --

CO Fault in memory

Cycling

Code

Flashing

Code 7

Cycling

Code

Flashing

Code 8

Cycling

Code

Flashing

Code 9

Cycling

Code

Test Mode

-- Over/Under

shutdown
Test Mode --

in memory
PM in memory

Test Mode -Swapped

FP1/FP2

Fault in memory

LEGEND
CO
FP

---

Condensate
Overflow
Freeze Protection

LED
LP

---

Light-Emitting
Low Pressure

High Pressure

Performance

Diode
Monitor

NOTES:
1. Slow flash is 1 flash every 2 seconds.
2. Fast flash is 2 flashes every 1 second.
3. EXAMPLE:
"Flashing
Code 2" is represented
by 2 fast flashes
followed
by a
10-second
pause. This sequence will repeat continually
until the fault is cleared.

CONDENSER
WATER LINKAGE -- The
control
provides optimized water loop operation using an universal
46

Table 35 -- Complete C Control LED Code and
Fault Descriptions
LED CODE

FAULT
No fault in memory

There has been no fault since the
last power-down to power-up
sequence

2
3

High-Pressure Switch
Low-Pressure Switch

HP switch opens instantly
LP switch opens for 30 continuous seconds before or during a
call (bypassed for first
60 seconds)
FP1 below Temp limit for
30 continuous seconds (bypassed
for first 60 seconds of operation)
FP2 below Temp limit for
30 continuous seconds (bypassed
for first 60 seconds of operation)

Freeze Protection Coax -FP1

Freeze Protection Air Coil -FP2

Condensate overflow

Sense overflow (grounded) for
30 continuous seconds

Over/Under Voltage
Shutdown
PM Warning

"R" power supply is <19VAC or
>30VAC
Performance Monitor Warning
has occurred.

FP1 and FP2
Thermistors are swapped

FP1 temperature is higher than
FP2 in heating/test mode, or FP2
temperature is higher than FP1 in
cooling/test mode.

OPEN VENT DAMPER
(OA) damper operation.

----

Freeze Protection
High Pressure
Light-Emitting Diode

LP
PM

---

OA damper

Retry Mode

-- In Retry mode, the status LED will start to
flash slowly to signal that the control is trying to recover from
an input fault. The control will stage off the outputs and try to
again satisfy the thermostat used to terminal Y. Once the thermostat input calls are satisfied, the control will continue normal
operation.
NOTE: If 3 consecutive faults occur without satisfying the
thermostat input call to terminal Y, the control will go into
lockout mode. The last fault causing the lockout is stored in
memory and can be viewed by entering Test mode.

Aquazone TM Deluxe D Control
LED Indicators _ There are 3 LED indicators on the Deluxe D control:
STATUS LEDStatus LED indicates the current status or
mode of the D control. The Status LED light is green.
TEST LEDTest LED will be activated any time the D
control is in test mode. The Test LED light is yellow.
FAULT LED -- Fault LED light is red. The fault LED will
always flash a code representing the last fault in memory. If
there is no fault in memory, the fault LED will flash code 1 and
appear as one fast flash alternating with a 10-second pause. See
Table 36.

COMPRESSOR
TEST--Tests
compressor
cooling
and
heating operation. Sequences cooling stage 1 then cooling
stage 2 followed by heating stage 2 then reduces capacity to
heating stage 1. Operates for 1 minute per step.
DEHUMIDIFICATION
TEST -Tests dehumidification
mode. Operates for 2 minutes.

Deluxe D Control Current LED Status and Alarm Relay Operations

DESCRIPTION

STATUS LED
(Green)

TEST LED
(Yellow)

FAULT LED (Red)

Normal Mode

Off

Flash Last Fault Code in Memory

Open

Normal Mode with PM

Off

Flashing Code 8

Cycle (closed 5 sec,
open 25 sec, ...)

Deluxe D Control
is non-functional

Off

off

Test Mode

Flash Last Fault Code in Memory

Night Setback
ESD

Flashing Code 2

Flash Last Fault Code in Memory

Invalid T-stat Inputs

Flashing Code 3
Flashing Code 4

---

Flash Last Fault Code in Memory
Flash Last Fault Code in Memory

No Fault in Memory
HP Fault

Off

Flashing Code 1

Open

Slow Flash

Off

Flashing Code 2

Open

LP Fault
FP1 Fault

Slow Flash

Off

Flashing Code 3

Open

Slow Flash

Off

Flashing Code 4

Open

FP2 Fault

Slow Flash

Off

Flashing Code 5

Open

CO Fault

Slow Flash

Off

Flashing Code 6

Open

Over/U nder Voltage
HP Lockout

Slow Flash
Fast Flash

Off

Flashing Code 7

Off

Flashing Code 2

Open (closed after 15 minutes)
Closed

LP Lockout
FP1 Lockout

Fast Flash
Fast Flash

Off

Flashing Code 3

Off

Flashing Code 4

Closed
Closed

FP2 Lockout

Fast Flash

Off

Flashing Code 5

Closed

CO Lockout

Fast Flash

Off

Condensate Overflow
Emergency Shutdown
Freeze Protection

HP
LP
PM

----

ALARM

RELAY

Open
Cycling Appropriate

Code

Closed
Flashing Code 6
NOTES:
1. If there is no fault in memory, the Fault LED will flash code 1.
2. Codes will be displayed with a lO-second Fault LED pause.
3. Slow flash is 1 flash every 2 seconds.
4. Fast flash is 2 flashes every 1 second.
5. EXAMPLE: "Flashing Code 2" is represented by 2 fast flashes followed by
a 10-second pause. This sequence will repeat continually until the fault is
cleared.

LEGEND
----

air

Once tests are complete, set unit test back to disable. Unit will
automatically reset to disable after 1 hour.

WSHP
Open Test Mode -- To enter WSHP Open test
mode, navigate from the BACview 6 home screen to the configuration screen. Choose the service screen and enable unit test.
The controller will then test the following:
FAN TEST -- Tests all fan speeds, sequences fan from low to
high, and operates each speed for one minute. Resets to disable
on completion.

CO
ESD
FP

-- Prepositions

outside

NOTE: The auxiliary heating test, H20 economizer test, open
vent damper 100% test, and preposition OA damper features
will not be visible on the screen unless configured.

Low Pressure
Performance Monitor

Table 36 -- Aquazone

100% TEST -- Tests

PREPOSITION
OA DAMPER
actuator to set proper preload.

LEGEND
FP
HP
LED

heat.

H20 ECONOMIZER
TEST -Tests entering/returning
water loop economizer operation. Sequences fan and opens
economizer water valve for one minute.

DESCRIPTION

7
(Autoreset)
8

AUXILIARY
HEATING TEST -- Tests
auxiliary
Sequences fan on and enables heating coil for 1 minute.

High Pressure
Low Pressure
Performance Monitor

SERVICE
Perform
indicated.

the procedures

outlined

Compressor
below

periodically,

-- Conduct annual amperage checks to ensure that amp draw is no more than 10% greater than indicated
on the serial plate data.

Fan Motors

_ All units have lubricated fan motors. Fan
motors should never be lubricated unless obvious, dry operation is suspected. Periodic maintenance oiling is NOT recommended as it will result m dirt accumulating in the excess oil
and cause eventual motor failure. Conduct annual dry operation check and amperage check to ensure amp draw is no more
than 10% greater than indicated on serial plate data.

To prevent injury or death due to electrical shock or contact
with mov.ing parts, open unit disconnect switch before servicing umt.
IMPORTANT: When a compressor is removed from this
unit, system refrigerant circuit oil will remain m the compressor. To avoid leakage of compressor oil, the refrigerant
lines of the compressor must be sealed after it is removed.

Condensate Drain Cleaning

-- Clean the drain line
and unit drain pan at the start of each cooling season. Check
flow by pouring water into drain. Be sure trap is filled to maintain an air seal.

Air Coil Cleaning

_ Remove dirt and debris from evaporator coil as required by condition of the coil. Clean coil with
a stiff brush, vacuum cleaner, or compressed
air. Use a fin
comb of the correct tooth spacing when straightening mashed
or bent coil fins.

IMPORTANT:
All refrigerant discharged from this unit
must be recovered without exception. Technicians must follow industry accepted guidelines and all local, state and federal statutes for the recovery and disposal of refrigerants.

Condenser Cleaning

_ Water-cooled condensers may
require cleaning of scale (water deposits) due to improperly
maintained closed-loop water systems. Sludge build-up may
need to be cleaned m an open water tower system due to
induced contaminants.

IMPORTANT: To avoid the release of refrigerant into the
atmosphere, the refrigerant circuit of this unit must only be
serviced by technicians who meet local, state and federal
proficiency requirements.

Local water conditions may cause excessive fouling or
pitting of robes. Condenser robes should therefore be cleaned at
least once a year, or more often if the water is contaminated.

Filters

-- Filters must be clean for maximum performance.
Inspect filters every month under normal operating conditions.
Replace when necessary.

aIMPORTANT:
filter.

Units should

never

be operated

without

Proper water treatment can
pitting. If such conditions are
analysis is recolranended.
Refer
Manual, Part 5, for general water

I
]

minflnize robe fouling and
anticipated, water treatment
to the Carrier System Design
conditioning information.

Water Coil

-- Keep all air out of the water coil. Check
open loop systems to be sure the well head is not allowing air
to infiltrate the water line. Always keep lines airtight.

Follow all safety codes. Wear safety glasses and rubber
gloves when using inhibited hydrochloric acid solution.
Observe and follow acid manufacturer's instructions.

Inspect heat exchangers regularly, and clean more frequently if the unit is located in a "dirty" enviromnent. Keep the heat
exchanger full of water at all times. Open loop systems should
have an inverted P trap placed in the discharge line to keep
water m the heat exchanger during off cycles. Closed loop
systems must have a minimum of 15 psig during the smraner
and 40 psig during the winter.
Check P trap frequently

Clean condensers with an inhibited hydrochloric acid solution. The acid can stain hands and clothing, damage concrete,
and, without inhibitor, damage steel. Cover surroundings to
guard against splashing. Vapors from vent pipe are not harmful,
but take care to prevent liquid from being carried over by the
gases.
Warm solution acts faster, but cold solution is .just as effective if applied for a longer period.
GRAVITY FLOW METHODDo not add solution faster
than vent can exhaust the generated gases.
When condenser is full, allow solution to remain overnight,
then dram condenser and flush with clean water. Follow acid
manufacturer's instructions. See Fig. 36.

for proper operation.

To avoid fouled machinery and extensive unit clean-up,
DO NOT operate units without filters m place. DO NOT
use equipment
as a temporary
heat source
during
construction.

Condensate Drain Pans

-- Check condensate
drain
pans for algae growth twice a year. If algae growth is apparent,
consult a water treatment specialist for proper chemical treatment. Applying an algaecide every three months will typically
eliminate algae problems in most locations.

FORCED CIRCULATION METHODFully open vent
pipe when filling condenser. The vent may be closed when
condenser is full and pump is operating. See Fig. 37.
Regulate flow to condenser with a supply line valve. If
pump is a non overloading type, the valve may be fully closed
while pump is running.

Refrigerant System

_ Verify air and water flow rates
are at proper levels before servicing. To maintain sealed circuitry integrity, do not install service gages unless unit operation
appears abnormal.

For average scale deposit, allow solution to remain m condenser overnight. For heavy scale deposit, allow 24 hours.
Drain condenser and flush with clean water. Follow acid manufacturer's instructions.

Check to see that unit is within the superheat and subcooling temperature ranges shown in Tables 20-30. If the unit is not
within these ranges, recover and reweigh in refrigerant charge.

FILL CONDENSER WITH
CLEANING SOLUTION. DO
NOT ADD SOLUTION
MORE RAPIDLY THAN
VENT CAN EXHAUST
GASES CAUSED BY
CHEMICAL ACTION.

pU_NNEL

PAl L

Compare the subcooling temperature with the normal
temperature listed in Tables 20-30. If the measured liquid
line temperature does not agree with the required liquid
line temperature, ADD refrigerant to raise the temperature or REMOVE refrigerant (using standard practices) to
lower the temperature (allow a tolerance of+ 3 ° F).

Refrigerant Charging
5' APPROX

To prevent personal _jury_ wear safety glasses and gloves
when handling refrigerant. Do not overcharge system -this can cause compressor flooding.

CONDENSER

NOTE: Do not vent or depressurize unit refrigerant
sphere. Remove and recover refrigerant following
practices.

to atmoaccepted

Air Coil Fan Motor Removal

Before attempting to remove fan motors or motor mounts,
place a piece of plywood over evaporator coils to prevent
coil damage.

Fig. 36 -- Gravity Flow Method
PUMP

PRIMING
CONN.

Disconnect motor power wires from motor terminals
motor is removed from unit.
1. Shut offunit

SUCTION
PUMP
SUPPORT

TANK

Loosen bolts on mounting
removed.

Loosen and remove the 2 motor mounting
on left side of bracket.

Replacing
tery--The

RETURN

System

Charge

full operating

charge. If recharging

bracket

bolts

the WSHP

Open

Controller's

Bat-

Method

WSHP
Open controller's
10-year lithium
CR2032 battery provides a minimum of 10,000 hours of data
retention during power outages.

-- Units are shipped with

NOTE: Power must be ON to the WSHP Open controller
when replacing the battery, or the date, time and trend data will
be lost.

Fig. 37 -- Forced Circulation
Checking

bracket so that fan belt can be

Slide motor/bracket
assembly to extreme right and lift out
through space between fan scroll and side frame. Rest motor on
a high platform such as a step ladder. Do not allow motor to
hang by its power wires.

REMOVE WATER
REGULATING VALVE

FINE MES
SCREEN

main power supply.

CONDENSER

before

is necessary:

1. Remove the battery from the controller,
the battery's polarity.

1. Insert thermometer
bulb in insulating rubber sleeve on
liquid line near filter drier. Use a digital thermometer for
all temperature measurements.
DO NOT use a mercury
or dial-type thermometer.
2.

Connect pressure gage to discharge

After unit conditions have stabilized,
on discharge line gage.
NOTE: Operate unit a minimum
checking charge.

Insert the new battery, matching the battery's polarity
with the polarity indicated on the WSHP Open controller.

line near compressor.

TROUBLESHOOTING

read head pressure

of 15 minutes

When troubleshooting problems with a WSHR consider the
following:

before

From standard field-supplied Pressure-Temperature
chart
for R-410A,
find equivalent
saturated
condensing
temperature.

Read liquid line temperature
on thermometer;
then
subtract from saturated condensing temperature. The difference equals subcooling temperature.

making note of

Control Sensors

-- The control system employs 2 nominal 10,000 ohin thermistors (FP1 and FP2) that are used for
freeze protection. Be sure FP1 is located in the discharge fluid
and FP2 is located in the air discharge. See Fig. 38.

Thermistor-

A thermistor may be required for singlephase units where starting the unit is a problem due to low
voltage. See Fig. 39 for thermistor nominal resistance.

,\ AIR,_
AIRFLOW

SUCTION

"_,COIL_

AIRFLOW

--{>(:'F)

COMPRESSOR

THERMISTOR
EXPANSION
VALVE
FP2

FPI
T

CONDENSATE
OVERFLOW

(co)

WATER

AIR COIL
FREEZE
PROTECTION

DISCHARGE

1
WATER

OUT

WATER

COIL
PROTECTION

LEGEND
COAX -- Coaxial Heat Exchanger
Airflow
Refrigerant Liquid Line Flow

Fig. 38 -- FP1 and FP2 Thermistor

at the TXV sensing bulb. Correct superheat of the refrigerant is
important for the most efficient operation of the unit and for the
life of the compressor.

90.0
80.0

Packaged heat pumps typically use one bi-flow TXV to
meter refrigerant in both modes of operation. When diagnosing
possible TXV problems it may be helpful to reverse the refrigerant flow to assist with the diagnosis.

70.0
60.0
E
50.0

40.0
30.0

Geothermal and water source heat pumps are designed to operate through a wide range of entering water temperatures that
will have a direct effect on the unit refrigerant operating pressures. Therefore, diagnosing TXV problems can be difficult.
TXV FAILURE -- The most colnmon failure mode ofa TXV
is when the valve fails while closed. Typically, a TXV uses
spring pressure to close the valve and an opposing pressure,
usually from a diaphragm, to open the valve. The amount of
pressure exerted by the diaphragm will vary, depending on the
pressure inside of the sensing bulb. As the temperature of and
pressure within the bulb decreases, the valve will modulate
closed and restrict the refrigerant flow through the valve. The
result is less refrigerant in the evaporator and an increase in the
superheat. As the temperature at the bulb increases the diaphragm pressure will increase, which opens the valve and
allows more refrigerant flow and a reduction in the superheat.

\
\

20.0
10.0
0.0
0.0

20.0

40.0

60.0

80.0

Temperature

Fig. 39 -- Thermistor

100.0

120.0

140.0

(degF)

Nominal Resistance

WSHP Open Controller
-- With the WSHP Open controller option, the 100 most recent alarms can be viewed using
the BACview 6 alarm status and alarm history.
To view the alarms:

If the sensing bulb, connecting capillary, or diaphragm
assembly are damaged, pressure is lost and the spring will force
the valve to a closed position. Often, the TXV will not close
completely so some refrigerant flow will remain, even if inadequate flow for the heat pump to operate.

1. Navigate to the Alarm Status screen from the Home
screen using the arrow softkeys. The screen will display
the current alarm status, either normal or Alarm, and allow for scrolling through the unit's alarm status.
2.

Location

The TXV sensing bulb must be properly located, secured,
and insulated as it will attempt to control the temperature of the
line to which it is connected. The sensing bulb must be located
on a dedicated suction line close to the compressor. On a packaged heat pump, the bulb may be located ahnost any place on
the tube running from the compressor
suction inlet to the
reversing valve. If the bulb is located on a horizontal section, it
should be placed in the 10:00 or 2:00 position for optimal
performance.

From the Alarm Status screen, press the Alarm softkey to
view the 100 most recent alarms which are labeled with
date and time for easy reference.

NOTE: Active faults can be viewed by scrolling down,
these faults indicate a possible bad sensor or some condition which may not merit an alarm.
3. To view alarms which have been corrected, scroll down
through the Alarm screen to Return Top Normal screen.
NOTE: Alarms are automatically
dition has been corrected.

reset once alarm con-

See Table 37 for possible alarm cause and solution.

Thermostatic

Expansion

Use caution when tightening the strap. The strap must be
tight enough to hold the bulb securely but caution must be
taken not to over-tighten the strap, which could dent, bend,
collapse or otherwise damage the bulb.

Valves

-- Thermostatic expansion valves (TXV) are used as a means of metering the
refrigerant through the evaporator to achieve a preset superheat

Thebulbmustbesecured
tothepipeusingacopper
strap.
Theuseofheattransfer
paste
between
thebulbandthepipe
willalsohelpensure
optimum
performance.
Thebulbmustalsobeproperly
insulated
toeliminate
any
influence
onvalveoperation
by thesurrounding
conditions.
Corktapeistherecommended
insulation
asit canbemolded
tighttothebulbtoprevent
airinfiltration.
Causes of TXV Failure
failure are:

-- The most common

Diagnostics--Several
tests may be required to determine if
a TXV has failed. The following tools may be required for
testing:
1. Refrigerant gage manifold
ant in the system

causes of TXV

1. A cracked, broken, or damaged sensing bulb or capillary
can be caused by excessive vibration of the capillary during shipping or unit operation.
If the sensing bulb is damaged or if the capillary is
cracked or broken, the valve will be considered failed and
must be replaced. Replacement of the TXV "power head"
or sensing bulb, capillary, diaphragm assembly is possible
on some TXVs. The power head assembly screws onto
most valves, but not all are intended to be replaceable. If
the assembly is not replaceable, replace the entire valve.
2.

Particulate debris within the system can be caused by several sources including contaminated components, robing,
and service tools, or improper techniques used during
brazing operations and component replacement.

•

Problems associated with particulate debris can be coinpounded by refrigerant systems that use POE (polyol ester oil). POE oil has solvent-like properties that will clean
the interior surfaces of robing and components. Particulates can be released from interior surfaces and may migrate to the TXV strainer, which can lead to plugging of
the strainer.
3.

•

Corrosive debris within the system may happen after a
failure, such as a compressor burn out, if system was not
properly cleaned.

4. Noncondensables
may be present in the system. Noncondensables
includes any substance
other than the
refrigerant or oil such as air, nitrogen, or water. Contan_nation can be the result of improper service techniques,
use of contaminated components, and/or improper evacuation of the system.

•
•

Low refrigerant suction pressure
High refrigerant superheat
High refrigerant subcoolmg
TXV and/or low pressure robing frosting
Equalizer line condensing and at a lower temperature than
the suction line or the equalizer line frosting
FP1 faults in the heating mode in combination with any of
the symptoms listed above
FP2 faults in the cooling mode in combination with any of
the symptoms listed above. Some symptoms can mimic a
failed TXV but may actually be caused be another problem.

Before conducting
ing must be verified:
•
•
•
•

Digital thermometer, preferably insulated, with wire leads
that can be connected directly to the tubing

Refrigerant
used

pressure-temperature

chart for the refrigerant

that a TXV has failed, verify the following:

The suction pressure is low and the valve is non-responsive.
The TXV sensing bulb can be removed from the suction
line and warmed by holding the bulb in your hand. This
action should result in an increase in the suction pressure
while the compressor
is operating. The sensing bulb can
also be chilled by immersion in ice water, which should
result in a decrease in the suction pressure
while the
compressor
is operating. No change in the suction pressure would indicate a nonresponsive
valve.
Simultaneous
LOW suction pressure, HIGH refrigerant
subcooling
and HIGH superheat may indicate a failed
valve.
LOW suction pressure, LOW subcoolmg and HIGH superheat may indicate an undercharge of refrigerant. HIGH subcooling and LOW superheat may indicate an overcharge of
refrigerant. The suction pressure will usually be normal or
high if there is an overcharge of refrigerant.
LOW suction pressure and frosting of the valve and/or
equalizer line may indicate a failed valve. However, these
symptoms may also indicate an undercharge of refrigerant.
Calculate the subcoolmg and superheat to verify a failed
valve or refrigerant charge issue.

Puron :R_refrigerant (R-410A) operates at higher pressure
than R-22, which is found in other WSHPs. Tools such as
manifold gages must be rated to withstand the higher pressures. Failure to use approved tools may result in a failure
of tools, which can lead to severe damage to the unit, injury
or death.

Symptoms -- The symptoms of a failed TXV can be varied
and will include one or more of the following:
•
•
•
•
•

with the refriger-

To determine
•

compatible

Most TXVs are designed for a fixed superheat setting and
are therefore considered non-adjustable.
Removal of the
bottom cap will not provide access for adjustinent and can
lead to damage to the valve or equipment, unintended venting of refrigerant, personal iniury, or possibly death.

an analysis for a failed TXV the followUse caution when tightening the strap. The strap must be
tight enough to hold the bulb securely but caution must be
taken not to over-tighten the strap, which could dent, bend,
collapse or otherwise damage the bulb.

Confirm that there is proper water flow and water temperarare in the heating mode.
Confirm that there is proper airflow and temperature in the
cooling mode.
Ensure coaxial water coil is clean on the reside; this applies
to the heating mode and may require a scale check.
Refrigerant may be undercharged. To verify, subcooling and
superheat calculations may be required.

Puron refrigerant (R-410A) requires the use of synthetic
lubricant (POE oil). Do not use coirnnon tools on systems
that contain R-22 refrigerants or mineral oil. Contamination and failure of this equipment may result.

IMPORTANT:
Repair of any sealed refrigerant system
requires training in the use of refrigeration tools and procedures. Repair should only be attempted by a qualified service technician. A universal refrigerant handling certificate
will be required. Local and/or state license or certificate
may also be required.

IMPORTANT: Always recover the refrigerant from the
system with suitable approved tools, recovery equipment,
and practices prior to attempting to remove or repair any
TX_.
IMPORTANT:
Due to the hygroscopic
nature of the
POE oil in Puron refrigerant (R-410A) and other environmentally
sound refrigerants,
any component
replacement must be conducted
in a timely manner
using
caution and proper service procedure
for these types of
refrigerants.
A complete installation
instruction will be
included with each replacement
TXV/filter drier assembly. It is of critical importance
these instructions
are
carefully understood
and followed.
Failure to follow
these instructions
can result in a system that is contaminated with moisture to the extent that several filter drier
replacements
may be required
to properly
dry the
system.

See Tables
information.

37-39

for

additional

troubleshooting

Disconnect power from unit before removing or replacing
connectors, or servicing motor. Wait 5 minutes after disconnecting power before opening motor.

Table 37 -- ECM Troubleshooting
FAULT
Motor rocks slightly
starting
Motor will not start

DESCRIPTION
when

SOLUTION
This is normal start-up for ECM.

No movement

Check power at motor.
Check low voltage (24-vac R to C) at motor.
Check low voltage connections
Check for unseated

(G,Y, W, R, C) at motor.

pins in connectors

on motor harness. See Fig. 40.

Test with a temporary jumper between R and G.
Check motor for tight shaft.
Perform motor/control

replacement

check.

Run moisture check. See Moisture Check section in Troubleshooting.
Motor rocks

Check for loose or non-compliant

motor mount.

Make sure blower wheel is tight on shaft.
Perform motor/control replacement check.
It is normal for motor to oscillate with no load on shaft.

Motor oscillates up and down
while being tested off of blower
Motor starts, but runs erratically

Varies up and down or intermittent

Check line voltage for variation

or "sag."

Check low voltage connections
connectors. See Fig. 40.

(G,Y, W, R, C) at motor, unseated

Check "Bk" for erratic cfm command
Check system controls,

pins in motor harness

(in variable speed applications).

thermostat.

Perform moisture check. See Moisture Check section in Troubleshooting.
"Hunts" or "puffs" at high cfm
(speed)

If removing panel or filter reduces "puffing,"

Stays at low cfm despite system
call for cool or heat cfm

Check low voltage (thermostat)

reduce restriction or reduce maximum

airflow.

wires and connections.

Verify fan is not in delay mode. Wait until delay is complete.
Check to see if "R" is missing/not
Perform motor/control
Stays at high cfm

connected

replacement

Check to see if "R" is missing/not

at motor.

check.
connected

at motor.

Verify fan is not in delay mode. Wait until delay is complete.
Perform motor/control

Excessive

noise

replacement

check.

Blower will not shut off

Check to see if there is current leakage from controls into G, Y, or W. Check for Triac switched
thermostat or solid state relay.

Noisy blower or cabinet

Determine

if it is air, cabinet, duct, or motor noise.

Check for loose blower housing,

panels, etc.

If high static is creating high blower speed, check for air whistling through seams in ducts,
cabinets, or panels.
If high static is creating high blower speed, check for cabinet/duct

Evidence of moisture

deformation.

"Hunts" or "puffs" at high cfm
(speed)
Motor failure or malfunction has
occurred and moisture is present

If removing panel or filter reduces "puffing," reduce restriction or reduce maximum

Evidence of moisture present
inside air mover

Perform moisture check. See Moisture Check section in Troubleshooting.

airflow.

Replace motor and perform moisture check. See Moisture Check section in Troubleshooting.

CO_ROL

_N_OTOR

¢t

.......
3.........
4
S

OEL_¥
COOL

A{X_U_

_T9

......
]0 BK/PW_ .....................................................
11
[

....
_2

HEA-r

l
I

15
i6

_T4i_J_NC

OQD

DO00

P_R

CONN_OR

PWB
PiN

H_D_]
_aP
DESCmP_

JLI:_P_
! 2_¢AC

C_3_

77_3-_

AMP

*
1-_4g--O

RH t 'TO PU'_ 2 FOR
Llb_ INP_r oNLY
C_UN

UNZ

_USiN_

- A_P

"" WARNING- APPLYING 2_JqAC LINE INPL_
W_
PiN _ 'TO PIN 2 JUMPER IN P_CE W!_
PER_N_NTLY
D_AGE
UNIT_
Fig. 40 -- ECM Pin Connectors

Stopped

or Malfunctioned

ECM Motor

Refer

to Fig. 41 to determine
the possible
cause of a stopped or malfunctioned
ECM motor. Follow the instructions
in the boxes.

WHEEL IS RUBBING AGAINST
HOUSING OR MOTOR SHAFT
IS SPINNING
FREELY, BLOWER
REPA1R
CONFIRM
_F EITHER
OR REPLACE AS NECESSARY.

NO
DOES BLOWER SPIN FREELY? J

YES

IS THERE 115V
SUPPUEO TO MOTOR?

I
I

'CHECK 115V SUPPLY,
CONNECTION FUSES,
SERVICE SWITCH AND
DOOR SWITCH.

11YES
D_SCONNECT 16 P_N
HARNESS FROM
MOTOR_ IS THERE 24V
ACROSS PIN12 & PIN!
AND P_N12 & PIN3
AT THE HARNESS PLUG?

NO
_[

ACROSS R &
B/C ON THE
_NTEGRATED
S
THERE 24V
CONTROL?

TO #_4ffEGRATED
CHECK 24V SUPPLY
CONTROL

I YES

YES

DISCONNECT 16PIN
HARNESS FROM
INTEGRATED CONTROL
_STHERE 24V ACROSS
PIN12 & PIN1 AND
PIN12 & PIN3
AT THE _NROL?

_NTEGRATED
REPLACE
CONTROL.

YES

CONNECTIONS
l CHECK
AND HARNESS
WIRE.

TURN THERMOSTAT MANUAL FAN
SWITCH ON {IF AVAILABLE) OR JUMPER
BE'Fv'VEEN R & G ON INTEGRATED CON_OL.
IS THERE VOLTAGE GREA_R THAN
12V BEP¢TEEN P_N15 & PIN1?

CHECK CONNECTIONS _D W_RES
AT INTEGRATED CONTROL IF OK
REPLACE INTEGRATED CONTROL

YES

CHECK CONNECTION ON HARNESS AND MOTOR,
RECONNECT HARNESS TO MOTOR ;F
C_NECT_ONS
ARE GOOO AND MOTOR STIL
DOES NOT RUN REPLACE MOTOR_

Fig. 41 -- ECM Troubleshooting

Flow Diagram

Moisture
•
•

Check -- To perform moisture check:
Check that connectors are orientated "down" (or as recommended by equipment manufacturer).
Arrange harnesses with "drip loop" under motor.

•
•
•
•

Check
Check
Check
Check

if condensate drain is plugged.
for low airflow (too much latent capacity).
for undercharged condition.
and plug leaks in return ducts, cabinet.

Table 38 -- Good Practices
DO

DO NOT

Check motor, controls wiring, and connections
ing motor,

thoroughly

before replac-

Automatically

assume the motor is bad,

Orient connectors down so water cannot get in, Install "drip loops."

Locate connectors

Use authorized

Replace one motor or control model number with another (unless
replacement is authorized),

motor and control model numbers for replacement,

above 7 and 4 o'clock positions,

Keep static pressure to a minimum by:
• Using high efficiency, low-static filters,
• Keeping filters clean,
• Designing ductwork for minimum static and maximum comfort,
• Improving ductwork when replacement is necessary.

Use high pressure drop filters,
Use restricted returns,

Size equipment

Oversize system then compensate

wisely.

Check orientation

before inserting motor connectors,

with low airflow,

Plug in power connector backwards,
Force plugs,

Table 39 -- WSHP Troubleshooting
FAULT
Main Power Problems

HEATING
X

COOLING
X

POSSIBLE CAUSE
Green Status LED Off

SOLUTION
Check line voltage circuit breaker and disconnect.
Check for line voltage between L1 and L2 on the contactor.
Check for 24 vac between R and C on controller.

HP Fault -- Code 2
High Pressure

x
x

Check
Reduced or no water flow in cool- Check
ing
Check
Water temperature out of range in Bring
cooling
Reduced or no airflow in
Check
heating
Check

primary/secondary
voltage on transformer.
pump operation or valve operation/setting.
water flow adjust to proper flow rate.
water temperature within design parameters.
for dirty air filter and clean or replace.
fan motor operation and airflow restrictions.

Dirty air coil -- construction dust etc.
External static too high. Check blower performance
Tables 11-13.
X

LP/LOC Fault -- Code 3
Low Pressure/Loss of
Charge
FP1 Fault -- Code 4
Water Freeze Protection

x
x

x
FP2 Fault -- Code 5
Air Coil Freeze Protection

Air temperature out of range
in heating
Overcharged with refrigerant
Bad HP switch
Insufficient

Bring return-air temperature
Check superheat/subcooling
Tables 20-30.

within design parameters.
vs typical operating condition per

Check switch continuity and operation.
Check for refrigerant leaks.

charge

Replace.

Compressor pump down at startup
Reduced or no water flow
in heating

Check charge and start-up water flow.

Inadequate antifreeze level
Improper freeze protect setting
(30 F vs 10 F)

Check antifreeze density with hydrometer.
Clip JW2 jumper for antifreeze (10 F) use.

Water temperature
Bad thermistor

Bring water temperature within design parameters.
Check temperature and impedance correlation.

out of range

Reduced or no airflow in
cooling

Check pump operation

or water valve operation/setting.

Plugged strainer or filter. Clean or replace.
Check water flow adjust to proper flow rate.

Check for dirty air filter and clean or replace.
Check fan motor operation and airflow restrictions.
External static too high. Check blower performance
Tables 11-13.

Air temperature

Improper freeze protect setting
(30 F vs 10 F)
Bad thermistor

out of range

LEGEND
LED
RV
TXV

----

Light-Emitting Diode
Reversing Valve
Thermostatic
Expansion Valve

per

Too much cold vent air. Bring entering air temperature
)arameters.
Normal airside applications
Check temperature

will require 30 F only.

and impedance

correlation.

within design

Table 39 -- WSHP Troubleshooting
FAULT
Condensate
Code 6

HEATING

Fault-

COOLING

POSSIBLE

(cont)

CAUSE

SOLUTION

Blocked drain

Check for blockage and clean drain.

Improper trap

Check trap dimensions

Poor drainage

Check for piping slope away from unit.

and location ahead of vent.

Check slope of unit toward outlet.
Poor venting. Check vent location.
Over/Under Voltage -Code 7 (Auto Resetting)

Moisture on sensor

Check for moisture shorting to air coil.

Under voltage

Check power supply and 24 vac voltage before and during
operation.
Check power supply wire size.
Check compressor

starting.

Check 24 vac and unit transformer
voltage.
Over voltage

Check power supply voltage and 24 vac before and during operation.
Check 24 vac and unit transformer
voltage.

Performance
Code 8

Monitor --

X
X

FP1 and FP2 Thermistors
-- Code 9

No Fault Code Shown

Swapped Thermistor
Code 9

Unit Short Cycles

Only Fan Runs

Only Compressor

tap for correct power supply

Heating mode FP2>125 F

Check for poor airflow or overcharged

Cooling mode FP1>125
FP2< 40 F

Check for poor water flow or airflow.

F OR

unit.

FP1 temperature is higher
than FP2 temperature.

Swap FP1 and FP2 thermistors.

FP2 temperature is higher
than FP1 temperature.

Swap FP1 and FP2 thermistors.

No compressor

See Scroll Compressor

Check and replace if necessary.

Compressor overload
Control board

FP1 and FP2 swapped

Reverse position of thermistors.

x
x

Dirty air filter
Unit in 'Test Mode'

Check and clean air filter.

x
x

Unit selection

Unit may be oversized for space. Check sizing for actual load of space.

Compressor

Ensure thermostat

Thermostat position
Unit locked out

Compressor

Check compressor

Thermostat

wiring

Check Y and W wiring at heat pump. Jumper Y and R for compressor
operation in Test mode.

Thermostat

wiring

Check G wiring at heat pump. Jumper G and R for fan operation.

Runs

operation

Rotation section.

Reset power and check operation.

Reset power or wait 20 minutes for auto exit.

overload

Check and replace if necessary.
set for heating or cooling operation.

Check for lockout codes. Reset power.

overload

overload.

Replace if necessary.

Check Y and W wiring at heat pump. Jumper Y and R for compressor
operation in test mode.
Fan motor relay

Jumper G and R for fan operation.
contacts.

Check for line voltage across BR

Check fan power enable relay operation (if present).
Unit Does Not Operate in
Cooling

Insufficient Capacity/
Not Cooling or Heating
Properly

Fan motor

Check for line voltage at motor. Check capacitor.

Reversing valve

Set for cooling demand and check 24 vac on RV coil and at control.
If RV is stuck, run high pressure up by reducing water flow and while
operating, engage and disengage RV coil voltage to push valve.

Thermostat

setup

Check for 'O' RV setup not 'B'.

Thermostat

wiring

Check O wiring at heat pump. Jumper O and R for RV coil 'Click'.

Dirty filter
Reduced or no airflow in
heating

Replace or clean.
Check for dirty air filter and clean or replace.
Check fan motor operation and airflow restrictions.
External static too high. Check blower performance
Tables 11-13.

Reduced or no airflow in
cooling

Check for dirty air filter and clean or replace.
Check fan motor operation and airflow restrictions.
External static too high. Check blower performance
Tables 11-13.

----

per

Leaky ductwork

Check supply and return air temperatures at the unit and at distant duct
registers if significantly different, duct leaks are present.

Low refrigerant charge

Check superheat

and subcooling

per Tables 20-30.

Restricted

Check superheat

and subcooling

per Tables 20-30. Replace.

Defective reversing valve

metering device

Thermostat improperly located
Unit undersized
Scaling in water heat exchanger
Inlet water too hot or cold

LEGEND
LED
RV
TXV

per

Light-Emitting Diode
Reversing Valve
Thermostatic Expansion Valve

Set for cooling demand

and check 24 vac on RV coil and at control.

If RV is stuck, run high pressure up by reducing water flow and while
operating, engage and disengage RV coil voltage to push valve.
Check location and for air drafts behind thermostat.
Recheck loads and sizing check sensible cooling load and heat pump
capacity.
Perform condenser

cleaning.

Check load, loop sizing, loop backfill, ground moisture.

Table 39 -- WSHP Troubleshooting
FAULT

HEATING

High Head Pressure

COOLING

POSSIBLE

CAUSE

Reduced or no airflow in
heating

(cont)
SOLUTION

Check for dirty air filter and clean or replace.
Check fan motor operation and airflow restrictions.
External static too high. Check blower performance
Tables 11 -13.

Low Suction Pressure

per

Reduced or no water flow in coolmg

Check pump operation or valve operation/setting.

Inlet water too hot

Check load, loop sizing, loop backfill, ground moisture.

Air temperature
heating

Bring return-air temperature

out of range in

Check water flow adjust to proper flow rate. See Tables 19 and 31.
within design parameters.

Scaling in water heat exchanger

Perform condenser

Unit overcharged

Check superheat and subcooling.

x
x

Noncondensables

in system

Restricted metering device
Reduced water flow in
heating

cleaning.
Reweigh in charge.

Remove refrigerant, evacuate system and charge unit.
Check superheat

and subcooling

per Tables 20-30. Replace.

Check pump operation or water valve operation/setting.
Plugged strainer or filter. Clean or replace.
Check water flow adjust to proper flow rate.

Water temperature
x

out of range

Reduced airflow in cooling

Bring water temperature

within design parameters.

Check for dirty air filter and clean or replace.
Check fan motor operation and airflow restrictions.
External static too high. Check blower performance
Tables 11-13.

Low Discharge Air
Temperature in Heating

x
x

Air temperature

Insufficient

x
x
x

High Humidity

Low Refrigerant
Pressure

Suction

X
X

out of range

charge

Too much cold vent air. Bring entering
3arameters.
Check for refrigerant

air temperature

within design

leaks.

Too high airflow

Check blower performance

Poor performance

See "Insufficient

Too high airflow
Unit oversized

Check blower performance

Normal operation
Reduced water flow

Check/compare

per Tables 11-13.

Capacity."
per Tables 11-13.

Recheck loads and sizing check sensible cooling load and heat pump
capacity.
with Tables 20-30.

Check pump operation.
Check strainer
Improper

Water temperature

Scaling in water to refrigerant
heat exchanger
Reduced airflow

per

out of range

Bring water
Conduct

or filter.

flow regulator.

Replace

temperature

water quality

within

flow regulator.
proper range.

analysis.

Check for dirty air filter.
Check for dirty air coil.
Check fan motor operation.
External

Return air temperature below
minimum

Excessive

High Refrigerant
Subcooling
TXV and/or Low Pressure
Tubing Frosting

Check for leaking

x
x

Insufficient

refrigerant

Locate and repair leak.

Improperly
ing bulb

located

Failed or restricted
device

metering

Failed TXV power head, capillary

Insufficient

refrigerant

Improperly
ing bulb

located

Failed or restricted
device

x
x

X
X

Excessive

Normal

X
X

Equalizer Line
Condensing or Frosting

charge

metering

Light-Emitting
Diode
Reversing Valve
Thermostatic
Expansion

TXV strainer.

Remove

refrigerant

Unplug

Valve

valve and compressor.
bulb. Replace.

reversing

or sensing

valve and compressor.
bulb. Replace.

TXV strainer.

as needed.

Failed TXV power head, capillary
TXV strainer.

Unplug

or sensing

bulb. Replace.

TXV strainer.

water

temperature

is close to minimum.

Locate and repair leak.
Failed TXV power head, capillary
Plugged

Failed or restricted metering
device

reversing

or sensing

line between

May occur when entering

LEGEND
----

Plugged

charge

of fresh air exposure.

Locate and repair leak.

Failed TXV power head, capillary

metering

parameters.

space temperature.

TXV strainer.

metering

refrigerant

Failed or restricted
device

Unplug

Locate bulb on suction

operation

Insufficient

TXV strainer.

line between

TXV sens-

refrigerant

Failed or restricted
device

amount

Locate bulb on suction

Plugged

fan operating

ductwork.

TXV sens-

LED
RV
TXV

fresh air. Reduce

Supply air bypassing to return
airstream (zone systems)
charge

exceeds

too cold. Increase

x
X

High Refrigerant
Superheat

static pressure

Space temperature

TXV strainer.

Unplug

Failed TXV power head, capillary
Plugged

TXV strainer.

Unplug

or sensing

bulb. Replace.

TXV strainer.
or sensing

TXV strainer.

bulb. Replace.

APPENDIX
SCREEN NAME

POINT NAME

Operating

A E WSHP
PASSWORD
LEVEL

OPEN SCREEN

EDITABLE

RANGE

Displays SPT

Condenser Leaving
Temperature

o F

Displays leaving condenser
water temperature

Condenser Entering
Temperature

o F

Displays entering condenser
water temperature (Value
will not update when compressor
is operating)

Compressor

Capacity

Displays SAT

Off/Low Speed/
Medium Speed
High Speed/On
0- 100%

No Password
Required

Displays fan speed status
Displays compressor

capacity

Displays current damper position
(Viewable only if Ventilation DMP
Type = 2 position or DCV)

Damper Position

0 - 100%

H20 Economizer

0- 100%

Displays position of economizer

0 - 100%

Displays
reheat valve
Air Auxiliary
1 stage

0 - 100%

Displays space RH% (Viewable only if
Humidity Sensor = Installed)

Heat

Space RH
Dehumidification
IAQ

0 - 9999 ppm

valve

position of auxiliary
(Viewable only if Leaving
Heat Type = 2 position,
Elect or Modulating)

Displays if dehumidification is active
(Viewable only if Factory
Dehumidification
Reheat = Installed)

Inactive/Active

SPT Alarm Status

Displays the space CO2 level
Displays current space
temperature condition

Normal/Alarm

Alarming SPT

o F

Displays the SPT that
exceeded the alarm limit (when SPT
alarm above is in Alarm)

SPT Alarm Limit

o F

Displays the SPT alarm limit that was
exceeded; causing the alarm condition
(when SPT alarm above is in Alarm)

SPT Sensor Alarm
Status

Compressor Alarm
Status

Displays the status of the Rnet
SPT sensor - ALARM is displayed
should the sensor fail to communicate
with the control module

Normal/Alarm

IAQ Alarm Status
No Password
Required

Normal/Alarm

Current IAQ/ventilation

Normal/Alarm

Current compressor

condition
condition

SAT Alarm Status

Normal/Alarm

Current SAT condition

Condensate Overflow
Alarm Status

Normal/Alarm

Condenser Water Temperature Alarm Status
Filter Alarm Status

Normal/Alarm

Current status of the condensate
drain (overflow switch)
Current status of the
condenser water

Normal/Alarm

Current filter condition

Space RH Alarm Status

Normal/Alarm

OAT Alarm Status

Normal/Alarm

Current space RH condition
Current status of the OAT
broadcast function

Airside Linkage Status
Condenser Water
Linkage
SAT

Normal/Alarm

Current linkage status if enabled

Normal/Alarm

Current linkage status if enabled

o F

SAT Offset

-9.9-10.0°

Leaving Condenser
Water Temperatu re
Leaving CW Offset
Rnet Sensor
Temperature
Rnet Offset

Sensor
Calibration

Display SAT
F

0OF

-9.9-

Admin Password
level access only

10.0 o F

0OF

Used to correct sensor reading

0°F

Used to correct sensor reading

o F
X

-9.9-

10.0 o F

Displays SPT

%
X

-15% - 15%

LEGEND
Building Automation System
Demand Controlled Ventilation
Indoor Air Quality
Outdoor Air Temperature
Relative Humidity
Supply Air Temperature
Space Temperature
Third Party Integration

Used to correct sensor reading
Displays Leaving Condenser
Water Temperature

o F

RH
RH Sensor Offset

---------

Displays unit operating mode

o F

Auxiliary

BAS
DCV
IAQ
OAT
RH
SAT
SPT
TPI

NOTES

SAT

Fan

Alarm Status

DEFAULT

Off, Fan Only, Economize,
Cooling, Heating, Cont Fan,
Test, Start Delay, Dehumidify
o F

Mode

SPT

Equipment
Status

CONFIGURATION

Displays Space RH value

APPENDIX
SCREEN

NAME

POINT NAME

Operating

Occupancy

OPEN

SCREEN

EDITABLE

Mode

RANGE

Auto/Continuous/Always

Status

Displays the current occupancy

status

Displays the origin of the
occupancy control
Displays OAT (Viewable only if OAT
is a network broadcast)

Displays SPT

SPT Status

Normal/Above Limit/Below
Limit/Sensor Failure

Displays the SPT status

Inactive/Con n ected

Displays the connection status
of the Rnet sensor

Overflow

Displays the status of the
condensate overflow

Normal/Alarm
oF

Displays the actual set point
being used for cooling control

Displays the actual set point
being used for heating control

Set Point Adjustment

Displays the offset values from the Rnet
user set point adjustment that is being
applied to the configured set points

Auxiliary Heat Control
Set Point

Displays the calculated set point being
used for auxiliary heating control

H20 Economizer
Control Set Point

Displays the calculated set point being
used for economizer control

Calculated IAQ/
Ventilation Damper
position

Displays the ventilation damper
position calculated by the DCV control

Active Compressor
Stages
SAT

0/1/2

Displays the actual number of
compressor stages operating

Reset Filter Alarm

No/Yes

Displays SAT
Used to reset the filter alarm timer after
the filter has been cleaned or replaced

Heating Set Point

No Password
required

Overflow Contact
Occupancy
BAS/Keypad

Contact

Closed/Open

Displays the state of the condensate
overflow switch contact

Closed/Open

Displays the state of the external/
remote occupancy input switch contact

Inactive/Occupied/
Unoccupied

Override

Inactive

BACnet

Provides capability to force the
equipment to operate in an
occupied or unoccupied mode
Displays if an OAT value is being
received from the Network

N/A / Network

OAT Input
X

See TPI

Keypad Configuration
Password

Mapping

Network

Changes password
See TPI

BACnet Time Master

Clock Set

System Settings

Override Schedules
Pushbutton

Override

Keypad Override
Schedules

Local Occupancy
Schedules
Local Holiday
Schedules

Schedule
Configuration

Local Override
Schedules
BACnet Occupancy
Schedules

User/Admin
Password level
access

See TPI
Changes clock/time
Inactive/Active

Occupied

Inactive/Active

Occupied

Inactive/Active Occupied/Active
Unoccupied

No Password
required

Occupancy Contact
BAS on/off

Inactive/Active

Occupied

Inactive/Active

Occupied

Inactive/Active

Occupied

Disable/Enable

Enable

Disable/Enable

Disable

Disable/Enable

Disable

Disable/Enable

Disable

Building Automation System
Demand Controlled Ventilation
Indoor Air Quality
Outdoor Air Temperature
Relative Humidity
Supply Air Temperature
Space Temperature
Third Party Integration

setting

Used to display the active and
inactive occupancy control inputs

LEGEND
---------

Displays how the fan is configured
to operate

Cooling Set Point

BAS
DCV
IAQ
OAT
RH
SAT
SPT
TPI

NOTES

Displays unit operating mode

Unoccupied/Occupied

Control

(cont)

Outside Air
Temperatu re
SPT

Condensate

Occupancy
Maintenance

DEFAULT

Always Occupied/Local Schedule/
BACnet Schedule/BAS Keypad/
Occupied Contact/Holiday Schedule/
Override Schedule/Pushbutton
Override/Unoccupied
None

SPT Sensor Status

Unit
Maintenance

CONFIGURATION

Off, Fan Only, Economize,
Cooling, Heating, Cont Fan, Test,
Start Delay, Dehumidify

Mode

Fan Operating
Occupancy

A E WSHP
PASSWORD
LEVEL

Used to define which occupancy
are used to determine
occupancy mode.

inputs

APPENDIX
SCREEN NAME

POINT NAME

A E WSHP
PASSWORD
LEVEL

OPEN

SCREEN

EDITABLE

CONFIGURATION
RANGE

(cont)

DEFAULT

NOTES

Heating

40 - 90 o F

72 ° F

Defines the Occupied
Heating Set Point

Occupied Cooling

55 - 99 o F

76 ° F

Defines the Occupied
Cooling Set Point

Occupied

Unoccupied

Heating

40 - 90 o F

55 ° F

Defines the Unoccupied
Heating Set Point

Unoccupied

Cooling

55 - 99 o F

90 ° F

Defines the Unoccupied
Cooling Set Point

Effective Heating
Set Point

O- 10 ° F

Effective Cooling
Set Point

0-10°F

Takes into effect bias (maximum
allowable set point deviation)
Takes into effect bias (maximum
allowable set point deviation)
Uses historical data to calculate
ramp up time so as to be at set point
at occupied/unoccupied
time

Optimal Start
Configuration
Occupied RH
Set Point

User/Admin
Password level
access

0 - 100%

65%

Defines the control set point used
during occupied periods (Viewable
only if Humidity Sensor = Installed/
Determines when to start
Dehumidification when occupied)

0 - 100%

90%

Defines the control set point used
during unoccupied periods
(Viewable only if Humidity Sensor =
Installed/Determines
when to start
Dehumidification when unoccupied)

500 ppm

Defines the control set point used to
start increasing ventilation during
occupied periods (Viewable only if
Ventilation DMP Type = DCV)

Set Points

Unoccupied RH
Set Point

DCV CTRL Start
Set Point

0 - 9999

DCV Max CTRL
Set Point

Configuration

0 - 9999

ppm

1050 ppm

Defines the control set point
used to define where the ventilation
will reach its maximum limit during
occupied periods (Viewable only if
Ventilation DMP Type = DCV/Used
to determine DCV ending control
point)
Defines the start time for an
occupied period

Start Time

00:00 - 23:59

06:00

End Time

00:00 - 24:00

18:00

Defines the ending time of an
occupied period

Mon

No/Yes

Yes

Determines if this day is included
in this schedule

No/Yes

Yes

Determines if this day is included
in this schedule

No/Yes

Yes

Determines if this day is included
in this schedule

Tue
User/Admin
Password level
access

Schedule

Wed

Thur

No/Yes

Yes

Determines if this day is included
in this schedule

Weekly Schedule

Fri

No/Yes

Yes

Determines if this day is included
in this schedule

Sat

No/Yes

Determines if this day is included
in this schedule

Sun

No/Yes

Determines if this day is included
in this schedule

Start Month

0-12

Defines the start month of this
holiday schedule

Start Day

0- 31

Defines the start day of this holiday
schedule

00:00 - 23:59

0:00

Configuration

Start Time

Schedule

---------

the start time for this
schedule

0-12

Defines the month to end this
holiday schedule

End Day

O- 31

Defines the day to end this holiday
schedule

End Time

00:00 - 24:00

0:00

LEGEND
BAS
DCV
IAQ
OAT
RH
SAT
SPT
TPI

Determines

End Month

Exception
Schedules 1 - 12

User/Admin
Password level
access

Building Automation System
Demand Controlled Ventilation
Indoor Air Quality
Outdoor Air Temperature
Relative Humidity
Supply Air Temperature
Space Temperature
Third Party Integration

Determines

the time to end this
schedule

APPENDIX
SCREEN

NAME

A E WSHP
PASSWORD
LEVEL

POINT NAME

SCREEN
EDITABLE

$
Unit
Configuration

DEFAULT

NOTES

Continuous

Auto= Intermittant operation during both
occupied and unoccupied periods/
Continuous = Intermittant during unoccupied
periods and continuous during occupied
periods/Always on = fan operates
continuously during both occupied and
unoccupied periods

0 - 30 sec

10 sec

Fan Off Delay

0 - 180 sec

45 sec

Heating Enable

Disable/Enable

Enable

Provides capability to manually
disable heating operation

Cooling Enable

Disable/Enable

Enable

Provides capability to manually
disable cooling operation

Minimum SAT in
Cooling
Maximum SAT in
Heating

50 ° F

Defines the minimum acceptable operating
temperature for the Supply Air

110 ° F

Defines the maximum acceptable operating
temperature for the Supply Air
Normally set to 100% if 2 position damper
type or set to minimum ventilation position if
damper type = DCV

Damper Ventilation
Position
DCV Maximum
Position

40-60

x
Admin Password
level access only

Vent

80-

° F

140 o F

0 - 100%

100%

0 - 100%

100%

0 - 9999 hrs

0 hrs

Usually set at 100% - Used to limit maximum
damper opening in DCV mode
Disables Filter Alarm if set to 0

Disable/Enable

Enable

Enables Override Feature on Rnet sensor

SPT Sensor Set Point
Adjustment

Disable/Enable

Enable

Lockout Cooling if
OAT <

-65 - 80 ° F

-65 o F

Cooling is locked out when OAT is less than
configured value and OAT is actively being
broadcast

Lockout Heating if
OAT >

35-

150 ° F

Heating is locked out when OAT is greater
than configured value and OAT is actively
being broadcast

Power Fail Restart
Delay

0 - 600 sec

60 sec

Disable/Enable

Enable

Set Point Separation

2-9OF

4OF

Test Mode

Disable/Enable

Disable

Used to enable test mode. Will automatically
reset to disable after 1 hour

Fan Test

Disable/Enable

Disable

Used to test all fan speeds. Sequences fan
from low to high and operates each speed for
1 minute. Resets to disable on completion

Occupancy

Override

Schedules

Compressor

Test

Dehumidification

150 o F

Off/Low Speed/Medium
Speed/High Speed/On

Fan Speed

Test

Testing Compressor

Disable/Enable

Disable

Disable/Enable

Disable

Inactive/Heating/Cooling/
Dehumidify/TimeGard
Wait

Admin Password
level access only

capability

starts

Enables unit occupied
Used to enforce minimum
set point separation

Used to test compressor cooling and heating
operation. Sequences cooling stage 1, then
stage 2, then heating stage 2 and reduces
capacity to stage 1. Operates for 1 minute per
step. Resets to disable on completion.
Used to test dehumification mode Operates for 2 minutes. Resets to
disable on completion.
test mode

Disable/Enable

Disable

Used to test auxiliary heat.
Sequences fan on and enables
heating coil for 1 minute. Resets to
disable on completion

Disable/Enable

Disable

Used to test entering/return air water loop
economizer coil operation. Sequences fan on
and opens economizer coil water valve for 1
minute. Resets to disable on completion

Preposition OA
Damper

Disable/Enable

Disable

Used to preposition OA damper
actuator to set proper preload

Open Vent
Damper 100%
SAT

Disable/Enable

Disable

Used to test OA damper operation

Aux Heating Test

H20 Economizer

Test

LCWT

LEGEND
---------

Delay before equipment

Displays compressor

BAS
DCV
IAQ
OAT
RH
SAT
SPT
TPI

Enables Set Point adjustment
on Rnet Sensor

Displays current fan operation

Test

Defines the delay time before the fan begins
to operate after heating or cooling is started
Defines the amount of time the fan will
continue to operate after heating or
cooling is stopped

Filter Alarm Timer

Service

(cont)

Fan On Delay

Pushbutton

Configuration

RANGE

Auto/Continuous/
Always On

Fan Mode

Configuration

OPEN CONFIGURATION

Building Automation System
Demand Controlled Ventilation
Indoor Air Quality
Outdoor Air Temperature
Relative Humidity
Supply Air Temperature
Space Temperature
Third Party Integration

Displays SAT
Displays Leaving Condenser
Water Temperature

APPENDIX
SCREEN NAME

POINT NAME

A E WSHP
PASSWORD
LEVEL

SCREEN

OPEN CONFIGURATION

EDITABLE

RANGE

# of Fan Speeds

1,2,3

Fan On

One Stage/Two Stages

One Stage

Reversing Valve Type

O type output/B type output

O type

Determines reversing valve
signal output type

Leaving Air Auxiliary
Heat Type

None/2-Position HW/1 Stage
Electric/Modulating
HW

None

Determines Auxiliary
Reheat Coil Type

Entering Air Water
Economizer Type
2-Position Water
Valve Type

None

Determines Entering Air
Economizer Coil Type

Normally

Closed/Normally

Open

Normally
Closed

Determines type of 2-position
water valve used

Modulating Water
Valve Type

Normally

Closed/Normally

Open

Normally
Closed

Determines type of modulating
water valve used

Ventilation Damper
Type

None/2-Position/DCV

None

Damper Actuator Type

(0-10 volt)/(2-10 volt)

Determines type of ventilation
damper control to be used
Used to determine ventilation
damper output signal range
(closed - open)

Humidity Sensor

None/Installed

None

None/Installed

None

Configuration

Stages

Factory Dehumidification Reheat Coil

Service
Configuration

Occupancy
Input Logic
Condensate Switch
Alarm Delay
Condensate Switch
Alarm State
Minimum Condenser
Water Temperature in
Heating
Maximum Condenser
Water Temperature in
Heating
Minimum Condenser
Water Temperature in
Cooling
Maximum Condenser
Water Temperature in
Cooling
IAQ sensor
minimum input
IAQ sensor
maximum input
IAQ sensor
minimum output
IAQ sensor
maximum output

Admin Password
level access only

None/2-Position/Modulating

Occupied

X
X

Open/Occupied

Closed

5 - 600 seconds
Alarm OPEN/Alarm

25-

CLOSED

60 ° F

0-10 volt

Occupied
CLOSED
10 sec
Alarm
CLOSED
60 ° F

Set to Installed if humidity
sensor is present
Set to Installed if factory-installed
dehumidification reheat coil
is present
Used to determine external occupancy switch contact occupied state
Delay before equipment alarms on
high condensate level
Determine Alarm state of
condensate switch input
Determines the minimum
acceptable water loop temperature
to start heating
Determines the maximum
acceptable water loop temperature
to start heating
Determines the minimum
acceptable water loop temperature
to start cooling
Determines the maximum
acceptable water loop temperature
to start cooling

65- 100 ° F

90 ° F

30 - 60 ° F

60 o F

85- 120 ° F

95 ° F

0 - 5 ma

4 ma

5 - 20 ma

20 ma

0 - 9999 ppm

0 ppm

Corresponding value in ppm for
minimum output current

0 - 9999 ppm

2000 ppm

Corresponding value in ppm for
maximum output current

LEGEND
---------

NOTES
Used to set number of
fan motor speeds

Fan On/Fan Low

Compressor

BAS
DCV
IAQ
OAT
RH
SAT
SPT
TPI

DEFAULT

When set to Fan On, G output is
energized when ever any fan speed
is active (required for ECM and Fan
control board). When set to Fan
Low, output is only energized for
Low Speed
Defines the number of
stages of compression

G Output Type

(cont)

Building Automation System
Demand Controlled Ventilation
Indoor Air Quality
Outdoor Air Temperature
Relative Humidity
Supply Air Temperature
Space Temperature
Third Party Integration

Minimum output current (mA)
for IAQ sensor
Maximum

output current (mA) for
IAQ sensor

APPENDIX
SCREEN

NAME

POINT NAME

A E WSHP
PASSWORD
LEVEL

SPT Occupied Alarm
Hysteresis

SCREEN

OPEN CONFIGURATION

EDITABLE

RANGE

2-20

° F

DEFAULT

(cont)
NOTES

5 ° F

Defines the hysteresis applied above
the cooling and below the heating set
points before an alarm condition will
occur

Configuration

SPT Alarm Delay

0 - 30 min per degree

10 min

Used to calculate the delay time before
an alarm is generated after the alarm
condition occurs

SPT Unoccupied Low
Alarm Temperature

35 - 90 ° F

45 o F

Defines the fixed unoccupied
ow SPT alarm limit

SPT Unoccupied High
Alarm Temperature
SAT Low SAT
Alarm Limit

95 ° F

15- 90 ° F

45 ° F

Defines the fixed unoccupied
high SPT alarm limit
Defines the fixed minimum
SAT alarm limit

SAT High SAT
Alarm Limit

90- 175 ° F

120 ° F

Defines the fixed maximum
SAT alarm limit

Condensate Overflow
Alarm Delay

5 - 600 sec

10 sec

Defines the delay time before an alarm
is generated after the alarm condition

Space Humidity Occupied
High Alarm Limit

45%- 100%

100%

Defines the fixed occupied
high space RH alarm limit

Space Humidity Alarm
Delay

0- 30 min per % RH

5 min

Used to calculate the delay time before
an alarm is generated after the alarm
condition occurs

45%- 100%

100%

IAQNentilation Occupied
High Alarm Limit

0 - 9999 ppm

1100 ppm

Defines the fixed occupied high
space IAQNentilation alarm limit

IAQ/Ventilation
Alarm Delay

0.1 - 1.0 min per ppm

0.25 min

Used to calculate the delay time before
an alarm is generated after the alarm
condition occurs

Rnet Sensor SPT Alarm

Ignore/Display

Ignore

Rnet Sensor SAT Alarm

Ignore/Display

Ignore

Rnet Sensor Compressor
Lockout Alarm

Ignore/Display

Display

Determines if the Compressor Lockout
alarm is displayed on the local Rnet
sensor

Rnet Sensor Condenser
Water Temperature Alarm

Ignore/Display

Display

Determines if the Condenser Water
Temperature alarm is displayed on the
local Rnet sensor

Rnet Sensor Condensate
Overflow Alarm

Ignore/Display

Display

Determines if the Condensate
Overflow alarm is displayed on the
local Rnet sensor

Rnet Sensor Dirty
Filter Alarm

Ignore/Display

Display

Determines if the Dirty Filter alarm is
displayed on the local Rnet sensor

Rnet Sensor Space
High Humidity Alarm

Ignore/Display

Ignore

Determines if the High Space
RH alarm is displayed on the
local Rnet sensor

Space Humidity Unoccupied High Alarm Limit

Alarm
Configuration

Configuration

4.
Linkage

45-

OCCUrs

Admin Password
level access only

---------

Defines the fixed unnoccupied
high space RH alarm limit

Determines if the SPT alarm is
displayed on the local Rnet sensor
Determines if the SAT alarm is
displayed on the local Rnet sensor

Loop Control Network
Number

See TPI

Loop Control Network
Address

See TPI

Number of Linked Heat
Pumps

See TPI

LEGEND
BAS
DCV
IAQ
OAT
RH
SAT
SPT
TPI

100 ° F

Building Automation System
Demand Controlled Ventilation
Indoor Air Quality
Outdoor Air Temperature
Relative Humidity
Supply Air Temperature
Space Temperature
Third Party Integration

Copyright 2009 Carrier Corporation
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Catalog No. 04-53500055-01
Printed in U.S.A.
Form 50PS-3Sl
Pg 66
7-09
Replaces: 50PS-2Sl

50PSH,PSV, PSD
START-UP CHECKLIST
CUSTOMER:

JOB NAME:

MODEL NO.:

SERIAL NO.:

DATE:

PRE-START-UP
DOES THE UNiT VOLTAGE CORRESPOND
HAVE THE POWER AND CONTROL
TIGHT?
(Y/N)_
HAVE WATER CONNECTIONS
(Y/N) __
HAS PUMP BEEN TURNED
HAS CONDENSATE

WITH THE SUPPLY VOLTAGE AVAILABLE?

WIRING

CONNECTIONS

(Y/N)

BEEN MADE AND TERMINALS

BEEN MADE AND IS FLUID AVAILABLE AT HEAT EXCHANGER?

ON AND ARE ISOLATION

CONNECTION

IS AN AIR FILTER INSTALLED?

VALVES OPEN?

(Y/N) __

BEEN MADE AND IS A TRAP INSTALLED?

(Y/N) __

II. START-UP
IS FAN OPERATING
IF 3-PHASE
(Y/N) __

WHEN COMPRESSOR

SCROLL COMPRESSOR

OPERATES?

(Y/N) __

IS PRESENT, VERIFY PROPER ROTATION PER INSTRUCTIONS.

UNIT VOLTAGE -- COOLING OPERATION
PHASE AB VOLTS

PHASE BC VOLTS
(if 3 phase)

PHASE CA VOLTS
(if 3 phase)

PHASE AB AMPS

PHASE BC AMPS
(if 3 phase)

PHASE CA MPS
(if 3 phase)

CONTROL VOLTAGE
IS CONTROL VOLTAGE ABOVE 21.6 VOLTS?
IF NOT, CHECK FOR PROPER TRANSFORMER

(Y!N) __
CONNECTION.

TEMPERATURES
FILL IN THE ANALYSIS

COAXIAL HEAT
EXCHANGER

AIR COIL

CHART ATTACHED.

COOLING CYCLE:
FLUID IN

FLUID OUT

PSI

FLOW

HEATING CYCLE:
FLUID IN

FLUID OUT

PSI

FLOW

COOLING
AIR IN

CYCLE:
F

AIR OUT

HEATING
AIR IN

CYCLE:
F

AIR OUT

CL-1

HEATING

CYCLE ANALYSIS
--

PSI

-F

AiR

SAT

SUCTION

"OCOILO
_\\\\\
oF

COMPRESSOR

EXPANSION
VALVE

DISCHARGE

\\\\\_

___°F
LIQUID LINE

___°F

__PSI

--PSI

FLUID

I FLUID

F
iii
Z

I
COOLING

CYCLE

-q
rh
iii
iio
rh

OUT
LOOK UP PRESSURE
DROP IN TABLE
TO DETERMINE
FLOW RATE

ANALYSIS

PSI

q
<

SAT

D
o

\\AIR\\

SUCTION
oF

\,,

[

EXPCp,ON

]

COMPRESSOR

DISCHARGE

iii
Z
,-q

LIQUID LINE

---°F

¢h
iii

l--

--._F

__PSI
FLUID IN

¢h
(D
Z

--PSI
FLUID OUT

q
LOOK UP PRESSURE
DROP IN TABLE
TO DETERMINE
FLOW RATE

HEAT OF EXTRACTION

(ABSORPTION)

FLOW RATE (GPM) x

OR HEAT OF REJECTION

=
FLUID FACTOR*

TEMR DIFF. (DEG F) x

=
(Btu/hr)

SUPERHEAT

SUBCOOLING

= SUCTION TEMPERATURE
= __
(DEG F)

- SUCTION

= DISCHARGE SATURATION
= __
(DEG F)

SATURATION

TEMPERATURE

- LIQUID LIN_ TEMPERATURE

*Use 500 for water, 485 for antifreeze.

97B0038N04

<
I-D

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CARRIER Air Conditioner/heat Pump(outside Unit) Manual L1001418

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