Carrier PTV Heat Pump Service Instructions

AQUAZONE™

50PTH, PTV, PTD026-072

Two-Stage Water Source Heat Pumps with PURON ® Refrigerant (R-410A)

Installation, Start-Up, and Service Instructions

CONTENTS

Page

SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . .1,2

GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-29

Step 1 — Check Jobsite . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Step 2 — Check Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

• 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 . . . . . . . . . . . . . . . . . . . . . 10

• WATER LOOP APPLICATIONS

• GROUND-WATER APPLICATIONS

• GROUND-LOOP APPLICATIONS

• INSTALLATION OF SUPPLY AND RETURN HOSE

KIT

Step 8 — Wire Field Power Supply . . . . . . . . . . . . . . 12

• POWER CONNECTION

• SUPPLY VOLTAGE

• 208-VOLT OPERATION

• 460-VOLT OPERATION

• WSHP OPEN WIRING

Step 9 — Wire Field Controls . . . . . . . . . . . . . . . . . . . . 25

• THERMOSTAT CONNECTIONS

• WATER FREEZE PROTECTION

• AIR COIL FREEZE PROTECTION

• ACCESSORY CONNECTIONS

• WATER SOLENOID VALVES

Step 10 — Operate ECM Interface Board . . . . . . . . 27

• STANDALONE — NO DDC CONTROLS

• WSHP OPEN CONTROLS

PRE-START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29,30

System Checkout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

FIELD SELECTABLE INPUTS . . . . . . . . . . . . . . . . . 30-33

Complete C Control Jumper Settings . . . . . . . . . . . . 30

Deluxe D Control Jumper Settings . . . . . . . . . . . . . . 30

Complete C Control DIP Switches . . . . . . . . . . . . . . . 30

Deluxe D Control DIP Switches . . . . . . . . . . . . . . . . . . 30

Units with Modulating Hot Water Reheat

(HWR) Option . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

• STANDALONE — NO DDC CONTROLS

• WSHP OPEN CONTROLS

• HWR APPLICATION CONSIDERATIONS

• HWR COMPONENT FUNCTIONS

Deluxe D Control Accessory

Relay Configurations . . . . . . . . . . . . . . . . . . . . . . . . . 32

Page

START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33-38

Operating Limits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Scroll Compressor Rotation . . . . . . . . . . . . . . . . . . . . . 34

Unit Start-Up Cooling Mode . . . . . . . . . . . . . . . . . . . . . 34

Unit Start-Up Heating Mode . . . . . . . . . . . . . . . . . . . . . 34

Unit Start-Up with WSHP Open Controls . . . . . . . . 36

Flow Regulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

Flushing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

Antifreeze . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

Cooling Tower/Boiler Systems . . . . . . . . . . . . . . . . . . 38

Ground Coupled, Closed Loop and Plateframe

Heat Exchanger Well Systems . . . . . . . . . . . . . . . . 38

OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38-42

Power Up Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Units with Aquazone™ Complete C Control . . . . . 39

Units with Aquazone Deluxe D Control . . . . . . . . . . 39

Units with WSHP Open Multiple Protocol . . . . . . . . 39

COMPLETE C AND DELUXE D BOARD

SYSTEM TEST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42,43

Test Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

WSHP Open Test Mode . . . . . . . . . . . . . . . . . . . . . . . . . . 43

Retry Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

Aquazone Deluxe D Control LED Indicators . . . . . 43

SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .44,45

Filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

Water Coil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

Condensate Drain Pans . . . . . . . . . . . . . . . . . . . . . . . . . 44

Refrigerant System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

Compressor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

Fan Motors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

Condensate Drain Cleaning . . . . . . . . . . . . . . . . . . . . . 44

Air Coil Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

Condenser Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

Checking System Charge . . . . . . . . . . . . . . . . . . . . . . . 45

Refrigerant Charging . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

Air Coil Fan Motor Removal . . . . . . . . . . . . . . . . . . . . . 45

Replacing the WSHP Open Controller’s

Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . 45-53

Thermistor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

Control Sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

WSHP Open Controller. . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

Thermostatic Expansion Valves . . . . . . . . . . . . . . . . . . 46

Stopped or Malfunctioned ECM Motor. . . . . . . . . . . . 50

Moisture Check. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

APPENDIX A — WSHP OPEN SCREEN

CONFIGURATION . . . . . . . . . . . . . . . . . . . . . . . . . . 54-59

50PTH,PTV,PTD START-UP

CHECKLIST . . . . . . . . . . . . . . . . . . . . . . . . . . CL-1, CL-2

IMPORTANT: Read the entire instruction manual before starting installation.

SAFETY CONSIDERATIONS

Installation and servicing of air-conditioning equipment can be hazardous due to system pressure and electrical

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.

Catalog No. 04-53500079-01 Printed in U.S.A.

Form 50PT-4SI Pg 1 7-10 Replaces: 50PT-3SI

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 information 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 injury or death. CAUTION is used to identify unsafe practices, which would result in minor personal injury or product and property damage.

Recognize safety information. This is the safety-alert symbol ( ). When this symbol is displayed on the unit and in instructions or manuals, be alert to the potential for personal injury.

WARNING

Electrical shock can cause personal injury 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.

GENERAL

This installation and start-up instructions literature is for

Aquazone™ two-stage water source heat pump systems.

Water source heat pumps (WSHPs) are single-package horizontally and vertically mounted units with electronic controls designed for year-round cooling and heating. Aquazone

WSHPs are available in the following unit configurations:

• 50PTH unit with horizontal airflow and right, left or back discharge

• 50PTV unit with vertical airflow and top discharge

• 50PTD 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 — Check Jobsite —

Installation, operation and maintenance instructions are provided with each unit. Before

2 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 (50PTH) — Horizontal units are designed for indoor installation only. Be sure to allow adequate space around the unit for servicing. See Fig. 1 for overall unit dimensions. Refer to Fig. 2 for an illustration of a typical horizontal installation.

VERTICAL AND DOWNFLOW UNITS (50PTV, PTD) —

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.

CAUTION

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 become clogged with construction dirt and debris which may cause system damage.

Step 2 — Check Unit —

Upon receipt of shipment at 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 to file all necessary claims with the shipping company.

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. Be sure the installation location is isolated from sleeping areas, private offices and other acoustically sensitive spaces.

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 drain pan is not required under the unit.

4. 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.

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

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

7. 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 necessary.

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

9. 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.

STORAGE — If the equipment is not needed immediately 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 times. 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 film, 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 any of the system components, be sure to examine each pipe, fitting, and valve, and remove any dirt or foreign material found in or on these components.

CAUTION

DO NOT store or install units in corrosive environments or in locations subject to temperature or humidity extremes

(e.g., attics, garages, rooftops, etc.). Corrosive conditions and high temperature or humidity can significantly reduce performance, reliability, and service life. Always move units in an upright position. Tilting units on their sides may cause equipment damage.

INSPECT UNIT — To prepare the unit for installation, complete the procedures listed below:

1. Compare the electrical data on the unit nameplate with ordering and shipping information to verify that the correct unit has been shipped.

2. Do not remove the packaging until the unit is ready for installation.

3. Verify that the unit’s refrigerant tubing is free of kinks or dents, and that it does not touch other unit components.

4. Inspect all electrical connections. Be sure connections are clean and tight at their terminations.

5. Loosen compressor bolts until the compressor rides freely on springs. Remove shipping restraints.

6. Remove the four 1 /

4

in. shipping bolts from compressor support plate (two bolts on each side) to maximize vibration and sound alternation.

CAUTION

Failure to remove shipping brackets from spring-mounted compressors will cause excessive noise and could cause component failure due to added vibration.

7. Remove any blower support cardboard from inlet of the blower.

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

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

Table 1 — Physical Data — 50PTH, PTV, PTD026-072 Units

038 UNIT 50PTH, PTV, PTD

COMPRESSOR (1 each)

FACTORY CHARGE R-410A (oz)

ECM FAN MOTOR AND BLOWER

Fan Motor Type

Fan Motor (Hp)

Blower Wheel Size (D x W) (in.)

COAXIAL COIL VOLUME (gal.)

WATER CONNECTION SIZE (FPT) (in.)

HWG CONNECTION SIZE (FPT) (in.)

VERTICAL

Air Coil

Dimensions (H x W) (in.)

Filter Standard — 1-in. Throwaway

(Qty — Size) (in.)

Weight (lb)

Operating

Packaged

HORIZONTAL

Air Coil

Dimensions (H x W) (in.)

Filter Standard — 1-in. Throwaway

(Qty — Size) (in.)

Weight (lb)

Operating

Packaged

VAR

1

/

2

9 x 7

.76

3 /

4

1 /

2

28 x 20

1 — 28 x 24

18 x 31

2 — 18 x 18

LEGEND

ECM — Electronically Commutated Motor

HWG — Hot Water Generator

VAR — Variable Speed

NOTE: All units have spring compressor mountings, TXV (thermostatic expansion valve) expansion devices, and 1 /

2

and 3 /

4

-in. electrical knockouts.

026

58

266

276

266

276

78

VAR

1

/

2

11 x 10

.92

3 /

4

1 /

2

28 x 25

1 — 28 x 30

327

337

20 x 25

1 — 12 x 20

1 — 20 x 24

327

337

049

Two-Stage, Scroll

81

VAR

1

11x10

1.24

1

1 /

2

32 x 25

2 — 16 x 30

416

426

20 x 40

1 — 18 x 20

1 — 20 x 24

416

426

064

144

VAR

1

11x10

1.56

1

1 /

2

36 x 25

1 — 16 x 30

1 — 20 x 30

443

453

20 x 45

2 — 20 x 24

443

453

3

072

156

VAR

1

11x10

1.56

1

1 /

2

36 x 25

1 — 16 x 30

1 — 20 x 30

443

453

20 x 45

2 — 20 x 24

443

453

2 Service

Access Front

ASP

Right

CSP

2 Service Access

Left Return

LEGEND

ASP — Alternate Service Panel

BSP — Blower Service Panel

CAP — Control Access Panel

CSP — Compressor Service Panel

FPT — Female Pipe Thread


HWR — Hot Water Reheat

Power Supply

3/4” Knockout

3.25”

1/2”

Knockout

1.6”

Discharge

Back

Discharge

H

Low Voltage

1/2” Knockout

Condensate

3/4” FPT

J

K

L

CAP

A

Right Return

3.25”

D

E

F

G

H

Condensate

3/4” FPT

Back

Discharge

Front

2 Service Access

Left

2 Service Access

CSP

Discharge

Right

View

V

BSP

U

Q P

O

Blower

Outlet

R

A

Y Configuration - Left Return/Back Discharge

P

ASP

S

C

Air Coil

Y

Blower

Outlet

M

O

Size

W Configuration - Left Return/Right Discharge - Air Coil Opening

1.1”

, 072

N

BSP

X

Z C

P

Blower

Outlet

R

O

BSP

Q

A

P Configuration - Right Return/Back Discharge - Air Coil Opening

BSP

N

P

Blower

Outlet

O

CSP

Left

View

M

N Configuration - Right Return/Left Discharge - Air Coil Opening

Front

Air Coil

S

C T

CSP

C

ASP T

Right

View

Front Front

B B

W Configuration - Left Return/Right Discharge - Air Coil Opening N Configuration - Right Return/Left Discharge - Air Coil Opening

50PTH

UNIT

026

038

049

064,072

OVERALL CABINET

A

Width

22.4

25.4

25.4

25.4

(in.)

B

Depth

62.2

71.2

76.2

81.2

C

Height

19.3

2.1

10.0

13.9

16.9

3.5

21.3

3.4

10.8

14.6

18.9

3.4

21.3

21.3

1

D

In

3.4

3.4

WATER CONNECTIONS (in.)

2

E

Out

10.8

10.8

3

F

HWG

In

15.6

15.6

4

G

HWG

Out

18.9

18.9

5

H

Condensate

3.4

3.4

3 /

4

3 /

4

1

1

1 /

1 /

2

2

1 /

2

1 /

2

WATER

CONNEC-

TIONS (in.)

- UNITS

WITH HWR

2.1

10.0

5.96 13.13

5.96 13.13

5.96 13.13

KNOCKOUTS (in.)

Loop

Water

FPT

(in.)

HWG

FPT

(in.)

1 2 1 /

2

J

-in.

Cond

1 /

K

2

-in.

Cond

3 /

L

4

-in.

Cond

Loop in D

Loop out E

Low

Voltage

Ext

Pump

Power

Supply

M

(LH rtn)

3.6

3.4

3.6

3.6

ELECTRICAL

6.1

6.1

6.1

6.1

8.6

8.6

8.6

8.6

DISCHARGE CONNECTIONS (in.)

DUCT FLANGE INSTALLED

(

 0.10 in.)

N

3.6 2.0

3.1 1.2

3.1 1.2

3.1 1.2

O

Supply

Height

12.5

19.0

19.0

19.0

P

Supply

Width

15.5

17.5

17.5

17.5

Q

(RH rtn)

R

3.6 2.0

3.1 1.0

3.1 1.0

3.1 1.0

RETURN CONNECTION

S

USING AIR COIL

OPENING (in.)

Return

Width

33.8

34.8

39.8

44.8

T

Return

Height

16.2

18.2

18.2

18.2

U V

2.3 1.5

3.1 1.5

3.1 1.5

3.1 1.5

NOTES:

1. Condensate connection is stainless steel 3 /

4

in. female pipe thread (FPT).

2. Unit shipped with top and bottom filter rack and is not suitable for duct connection without additional support.

3. Discharge flange is factory-installed.

4. Hanger kit is factory-installed.

5. Shaded areas are recommended service areas, not required.

6. Discharge can be modified in field. Return cannot be modified.

AIRFLOW CONFIGURATION

CODE

N

P

W

Y

RETURN

Right

Right

Left

Left

DISCHARGE

Left

Back

Right

Back

Fig. 1 — 50PTH026-072 Dimensional Data

4

Field-supplied transition to minimize pressure loss

Supply Air

Insulated supply duct with at least one 90 degree elbow to reduce air noise

(field-supplied)

Flexible

Connection

Field-Supplied

Electric Heat

(if applicable)

Aux Electric

Heat Disconnect

3/8” threaded rods

(by others)

Filter Access

Return Air

(Ductwork not shown)

Thermostat

Wiring

Power Wiring

Unit Power

Disconnect

(by others)

Unit Hanger

(factorysupplied)

Unit Power

Stainless steel braid hose with integral

“J” swivel

Balancing Valve (fieldinstalled accessory)

Low Pressure Drop Water

Control Valve (optional)

(field-installed accessory)

Building

Loop

Water Out

Water In


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

3/8” Threaded

Rod (by others)

Vibration Isolator

(white-compressor end and red-blower end)

Washer

(by others)

Double Hex Nuts

(by others)

Integral hanger supportpre-attached in factory

UNIT HANGER ISOLATION DETAIL

Fig. 2 — Typical Installation — 50PTH Unit

5

LEGEND






HV — High Voltage



LV — Low Voltage

Filter Bracket

Field-Installed

Discharge Flange

(shipped loose inside blower section)

Access Panels

Air Coil

P N

N P

B

ASP

BSP

U

O

Q

Air Coil Side

K - Configuration - Right Return

/Top Discharge

(Top View)

S R

Air Coil

U

R

Air Coil Side

J - Configuration - Left Return

/Top Discharge

(Top View)

M

S

O

A

Air Coil

CSP

2ʼ Service Access

CAP

ASP

Isometric View

1.00”

2ʼ Service Access

T T

Front

C

ASP

Back Back

C

CSP

1.18”

Front

Power Supply

3/4”

HV Knockout

1/2”

Knockout

Low Voltage

1/2”

LV Knockout

CSP

1.63”

CAP

J

K

L

1.68”

Condensate

3/4” FPT

D

H

E

F

G

K - Configuration - Right Return -

Air Coil Opening

(Right Side View)

J - Configuration - Left Return -

Air Coil Opening

(Left Side View)

NOTES:


4



3. Discharge flange is field-installed.


Front View

50PTV

UNIT

026

038

049

064,

072

OVERALL CABINET

A

Width

(in.)


22.4

25.6

48.5

2.1

10.0

13.9

16.9

25.4

25.4

25.4

B

Depth

30.6

30.6

30.6

C

Height

50.5

54.5

58.5

1

D

In

3.4

3.4

3.4

2

E

Out

10.8

10.8

10.8

3

F

HWG

In

15.6

15.6

15.6

4

G

HWG

Out

18.9

18.9

18.9

5

H

Condensate

7.8

7.8

7.8

7.8

Loop

Water

FPT

(in.)

3

3

/

/

1

1

4

4

WATER

CONNEC-

TIONS (in.)

- UNITS

WITH HWR

ELECTRICAL

KNOCKOUTS (in.)

HWG

FPT

(in.)

1 2 1 /

2

J

-in.

Cond

Loop in D

Loop out E

Low

Voltage

1 /

K

2

-in.

Cond

Ext

Pump

3 /

L

4

-in.

Cond

Power

Supply

1 /

2

1 /

2

1 /

2

1 /

2

2.1

10.0

5.96 13.13

5.96 13.13

5.96 13.13

3.6

3.6

3.6

3.6

6.1

6.1

6.1

6.1

8.6

8.6

8.6

8.6



(

 0.10 in.)

RETURN CONNECTION

USING AIR COIL OPENING

(in.)

M

(LH rtn)

7.2

6.4

6.4

6.4

N

5.8

6.3

6.3

6.3

O

Supply

Width

14.0

18.0

18.0

18.0

P

Supply

Depth

14.0

18.0

18.0

18.0

Q

(RH rtn)

4.9

5.3

5.3

5.3

R

2.2

2.2

2.2

2.2

S

Return

Depth

21.1

26.1

26.1

26.1

T

Return

Height

27.2

27.2

31.2

35.2

U

1.0

1.0

1.0

1.0

AIRFLOW CONFIGURATION

CODE

J

K

RETURN

Left

Right

DISCHARGE

Top

Top

Fig. 3 — 50PTV Dimensional Data

6

LEGEND








50PTD

UNIT

026

038

049

064,072

OVERALL CABINET

A

Width

22.4

(in.)

B

Depth

25.6

C

Height

1

D

In

2

E


Out

3

F

HWG

In

4

G

HWG

Out

5

H

Condensate

52.5

2.1 10.0 13.9 16.9

3.6

WATER

CONNEC-

TIONS (in.)

- UNITS

WITH HWR

ELECTRICAL

KNOCKOUTS (in.)

Loop

Water

FPT

(in.)

HWG

FPT

(in.)

1 2 1 /

2

J

-in.

Cond

Loop in D

Loop out E

Low

Voltage

2.1

10.0

3.6

1 /

K

2

-in.

Cond

Ext

Pump

6.1

L

3 /

4

-in.

Cond

Power

Supply

8.6

25.4

25.4

25.4

30.6

30.6

30.6

54.5

58.5

62.5

3.4 10.8 15.6 18.9

3.4 10.8 15.6 18.9

3.4 10.8 15.6 18.9

3.6

3.6

3.6

3 /

4

3 /

4

1

1

1 /

2

1 /

2

1 /

2

1 /

2

5.96 13.13

5.96 13.13

5.96 13.13

3.6

3.6

3.6

6.1

6.1

6.1

8.6

8.6

8.6



(

 0.10 in.)

RETURN CONNECTION (in.)

USING AIR COIL OPENING

M

(LH rtn)

6.7

7.2

9.0

13.4

7.2

9.0

13.4

7.2

N

8.4

9.0

O

Supply

Width

10.1

13.4

P

Supply

Depth

9.1

12.9

12.9

12.9

Q

(RH rtn)

10.8

10.4

2.2

26.1

10.4

2.2

26.1

10.4

R

2.2

2.2

S

Return

Depth

21.1

26.1

T

Return

Height

27.2

27.2

31.4

35.2

U

1.0

1.0

1.0

1.0

AIRFLOW CONFIGURATION NOTES:


4



3. Downflow unit does not have discharge flange, and is rated for zero clearance installation.


CODE

J

K

RETURN

Left

Right

DISCHARGE

Bottom

Bottom

Fig. 4 — 50PTD Dimensional Data

7

Supply Air

Return

Air

Power

Thermostat

Wiring

Flexible

Connection

Building

Loop

Water

Out

Water

In

Stainless steel braid hose with integral

“J” swivel


Balancing Valve

(field-installed

accessory)

Low Pressure

Drop Water

Control Valve

(optional)

(field-installed

accessory)

Compressor

Access Panel

Ball Valve with optional

integral P/T plug

(typical for supply and

return piping) (field-Installed

accessory)

NOTE: Ball valve with integral pressure temperature plug recommended.

Fig. 5 — Typical Vertical Installation — 50PTV Unit

Flexible

Connection

Building

Loop

Return

Air

Power

Thermostat

Wiring

Water

Out

Stainless steel braid hose with integral ”J” swivel(fieldinstalled accessory)

Water

In

Balancing Valve

(field-installed

accessory)

Low Pressure

Drop Water

Control Valve

(optional)


Compressor

Access Panel

Flexible

Connection

Supply Air

Ball Valve with optional integral

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

NOTE: Ball valve with integral pressure temperature plug recommended.

Fig. 6 — Typical Downflow Installation —

50PTD Unit

Step 3 — Locate Unit —

The following guidelines should be considered when choosing a location for a WSHP:

• Units are for indoor use only.

• Locate in areas where ambient temperatures are between

39 F and 102 F and relative humidity is no greater than

75%.

• Provide sufficient space for water, electrical and duct connections.

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

• Allow enough space for service personnel to perform 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.

• Install the unit on a piece of rubber, neoprene or other mounting pad material for sound isolation. The pad should be at least 3 /

8

in. [10 mm] to 1 unit.

/

2

in. [13 mm] in thickness. Extend the pad beyond all four edges of the

• Provide adequate clearance for filter replacement and drain pan cleaning. Do not block filter access with piping, conduit or other materials. Refer to Fig. 1, 3, and 4 for dimensional data.

• Provide access for fan and fan motor maintenance and for servicing the compressor and coils without removing the unit.

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

• In limited side access installations, pre-removal of the control box side mounting screws will allow control box removal for future servicing.

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

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.

FIELD CONVERSION OF DISCHARGE AIR — The discharge air of the 50PTH horizontal units can be converted between side and back discharge in the field. The conversion process is the same for right and left return configurations. See

Fig. 7 and 8.

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

Water

Connection End

Return Air

Supply

Duct

Side Discharge

Water

Connection End

Return Air

Drain

Back Discharge

Discharge Air

Fig. 7 — Conversion Right Return,

Side Discharge to Back Discharge

Preparation — The unit should be on the ground in 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. 8.

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.

8

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.

Water

Connection End

Remove Screws

Return Air

Side Discharge

Water

Connection End

Water

Connection End

Move to Side

Replace Screws

Rotate

Return Air

Return Air

Drain

Back Discharge Discharge Air

Fig. 8 — Conversion Left Return,

Side Discharge to Back Discharge

Back to Side Discharge Conversion — Follow instructions above for Side to Back Discharge Conversion, noting the panels would be reversed.

Step 4 — Mount the Unit

HORIZONTAL UNIT (50PTH) — 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 attachments must be able to support the weight of the unit. See Table 1 for unit operating weights.

VERTICAL UNITS (50PTV,PTD) — Vertical and downflow units are available in left or right return air configurations. See

Fig. 3 and 4. Mount the unit (except 50PTD) on a vibration absorption pad slightly larger than the entire base to minimize 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.

9

Fig. 9 — 50PTV Units Mounted With

Vibration Absorption Pad

Step 5 — 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 ATTENUATION — To 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 recommended 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 SYSTEM — If 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 (50PTH) — Slope the unit toward the drain at 1 /

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 building drain.

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.

VERTICAL UNITS (50PTV,PTD) — 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 common trap or vent.

1/4” Pitch for

Drainage

Pitch Toward

Drain

Drain Connection

Fig. 10 — Horizontal Unit Pitch

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

Fig. 11 — Trap Condensate Drain

3/4” Copper FPT/PVC

Water

Connections

1/2”

3/4” PVC

Vent

1/4” per foot slope to drain

1/2”

Alternate

Condensate

Location

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

Fig. 12 — Vertical Condensate Connection

VENTING — Install 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.

10

• 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 —

Depending on the 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 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 temperatures 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.

WATER LOOP APPLICATIONS — Water loop applications usually include a number of units plumbed to a common piping system. Maintenance to any of these units can introduce air into the piping system. Therefore, air elimination equipment comprises a major 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.

Cooling tower/boiler systems typically utilize a common 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 recommended. If an open type cooling tower is used continuously, chemical treatment and filtering will be necessary.

In addition to complying with any applicable codes, consider the following for system piping:

• Piping systems using water temperatures below 50 F require 1 /

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 recommended 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:

• 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.


• Use PVC SCH80 or copper piping material.

NOTE: PVC SCH40 should not be used due to system high pressure and temperature extremes.

Water

Control

Valve


Flow

Regulator


Pressure

Tank

Water Out

Water In

From Pump

Shut-Off

Valve (field-installed accessory)

Boiler

Drains

(field-installed)

Strainer (field-installed accessory)

(16 to 20 mesh recommended for filter sediment)

Fig. 13 — Typical Ground-Water Piping Installation

Water Supply and Quantity — Check water supply. Water supply should be plentiful and of good quality. See Table 2 for water quality guidelines.

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

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 treatment firm, independent testing facility, or local water authority for specific recommendations to maintain water quality within the published limits.

GROUND-LOOP APPLICATIONS — Temperatures between

25 and 110 F and a cooling capacity of 2.25 to 3 gpm of flow per ton is recommended. In addition to complying with any applicable codes, consider the following for system piping:

• 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.


• Use pressure-temperature (P/T) plugs to measure flow of pressure drop.

INSTALLATION OF SUPPLY AND RETURN HOSE

KIT — Follow these piping guidelines.

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

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

3. Place strainers at the inlet of each system circulating pump.

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

5. 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 minimum.

NOTE: Piping must comply with all applicable codes.

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 minimum expected dew point of the pipe ambient. Insulation is required if loop water temperature drops below the dew point.

CAUTION

Do not bend or kink supply lines or hoses.

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.

NOTE: When anti-freeze is used in the loop, assure that it is compatible with Teflon tape or pipe joint compound employed.

Maximum allowable torque for brass fittings is 30 ft-lb. If a torque wrench is not available, tighten finger-tight plus one quarter turn. Tighten steel fittings as necessary.

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-joint fittings at one end to prevent kinking during installation.

CAUTION

Backup wrench is required when tightening water connections to prevent water line damage.

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.

11

Table 2 — Water Quality Guidelines

CONDITION

HX

MATERIAL*

CLOSED RECIRCULATING† OPEN LOOP AND RECIRCULATING WELL**

Scaling Potential — Primary Measurement

Above the given limits, scaling is likely to occur. Scaling indexes should be calculated using the limits below.

pH/Calcium

Hardness Method

All N/A

Index Limits for Probable Scaling Situations (Operation outside these limits is not recommended.) pH < 7.5 and Ca Hardness, <100 ppm

Scaling indexes should be calculated at 150 F for direct use and HWG applications, and at 90 F for indirect HX use. A monitoring plan should be implemented.

Ryznar Stability Index

All N/A

6.0 - 7.5

If >7.5 minimize steel pipe use.

Langelier Saturation Index

All N/A

–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)

Iron Fouling

All

All

N/A

N/A

If Fe

2+

<0.2 ppm (Ferrous)

(ferrous) >0.2 ppm with pH 6 - 8, O

2

<5 ppm check for iron bacteria.

<0.5 ppm of Oxygen

Above this level deposition will occur.

Corrosion Prevention†† pH

Hydrogen Sulfide (H

2

S)

Ammonia Ion as Hydroxide,

Chloride, Nitrate and Sulfate

Compounds

Maximum Chloride Levels

All

All

All

6 - 8.5

Monitor/treat as needed.

N/A

N/A

6 - 8.5

Minimize steel pipe below 7 and no open tanks with pH <8.

<0.5 ppm

At H

2

S>0.2 ppm, avoid use of copper and cupronickel piping or HXs.

Rotten egg smell appears at 0.5 ppm level.

Copper alloy (bronze or brass) cast components are okay to <0.5 ppm.

<0.5 ppm

Copper

Cupronickel

304 SS

316 SS

Titanium

N/A

N/A

N/A

N/A

N/A

Maximum allowable at maximum water temperature.

50 F (10 C)

<20 ppm

<150 ppm

<400 ppm

<1000 ppm

>1000 ppm

75 F (24 C)

NR

NR

<250 ppm

<550 ppm

>550 ppm

100 F (38 C)

NR

NR

<150 ppm

<375 ppm

>375 ppm

Erosion and Clogging

Particulate Size and Erosion

All

<10 ppm of particles and a maximum velocity of 6 fps.

Filtered for maximum

800 micron size.

<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.

Brackish

All N/A

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

LEGEND

HWG — Hot Water Generator

HX — Heat Exchanger

N/A — Design Limits Not Applicable Considering Recirculating

Potable Water

NR — Application Not Recommended

SS — Stainless Steel

*Heat exchanger materials considered are copper, cupronickel, 304 SS

(stainless steel), 316 SS, titanium.

†Closed recirculating system is identified by a closed pressurized piping system.

**Recirculating open wells should observe the open recirculating design considerations.

††If 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/l is equivalent to ppm.

Table 3 — Metal Hose Minimum Bend Radii

HOSE DIAMETER (in.)

1 /

2

3 /

4

1

MINIMUM BEND RADII (in.)

2 1 /

2

4

5

1

/

2

Rib Crimped

Swivel

Brass

Fitting

Brass

Fitting

Step 8 — Wire Field Power Supply

WARNING

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.

Length

(2 ft Length Standard)

Fig. 14 — Supply/Return Hose Kit

MPT

CAUTION

Use only copper conductors for field-installed electrical wiring. Unit terminals are not designed to accept other types of conductors.

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

12

conform to the Class II temperature limitations described in the

NEC.

Refer to unit wiring diagrams Fig. 15-24 for a schematic of the field connections, which must be made by the installing (or electrical) contractor. For Deluxe D with WSHP Open controls

3-phase units and Complete C with Open controls single-phase and 3-phase units contact Application Engineering. Refer to

Table 4 for fuse sizes.

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 and phase as shown in electrical data shown in Table 4.

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. 25. See Table 4 for amperage ratings to provide correct wire and maximum overcurrent protection sizing.

SUPPLY VOLTAGE — Operating voltage to unit must be 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 imbalance:

% Voltage Imbalance

= 100 x max voltage deviation from average voltage average voltage

Example: Supply voltage is 460-3-60.

AB = 452 volts

BC = 464 volts

AC = 455 volts

Average Voltage =

=

452 + 464 + 455

3

1371

3

= 457

Determine maximum deviation from average voltage:

(AB) 457 – 452 = 5 v

(BC) 464 – 457 = 7 v

(AC) 457 – 455 = 2 v

Maximum deviation is 7 v.

Determine percent voltage imbalance.

% Voltage Imbalance = 100 x

= 1.53%

7

457

This amount of phase imbalance is satisfactory as it is below the maximum allowable 2%.

Operation on improper line voltage or excessive phase imbalance constitutes abuse and may cause damage to electrical components.

NOTE: If more than 2% voltage imbalance is present, contact your local electric utility.

208-VOLT OPERATION — All 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.

460-VOLT OPERATION — Units using 460-v and an ECM

(electronically commutated motor) fan motor, modulating

HWR, and/or internal secondary pump will require a neutral wire from the supply side in order to feed accessory with

265-v.

50PTH,

PTV, PTD

UNITS

V-PH-Hz*

VOLTAGE

MIN/MAX

Table 4 — 50PTH,PTV,PTD Electrical Data

COMPRESSOR

RLA LRA

026

038

049

064

072

208/230-1-60 197/254

208/230-1-60 197/254

208/230-3-60 197/254

460-3-60 414/506

208/230-1-60 197/254

208/230-3-60 197/254

460-3-60 414/506

208/230-1-60 197/254

208/230-3-60 197/254

460-3-60 414/506

208/230-1-60 197/254

10.3

16.7

11.2

4.5

21.2

13.5

6.4

25.6

17.6

9.0

27.2

LEGEND

FLA — Full Load Amps

HACR — Heating, Air Conditioning and Refrigeration

LRA — Locked Rotor Amps

RLA — Rated Load Amps

HWR — Hot Water Reheat

52.0

82.0

58.0

29.0

96.0

88.0

41.0

118.0

123.0

62.0

150.0

FAN

MOTOR

FLA

4.3

4.3

4.3

4.1

7.0

7.0

6.9

7.0

7.0

6.9

7.0

TOTAL

UNIT FLA

14.6

21.0

15.5

8.6

28.2

20.5

13.3

32.6

24.6

15.9

34.2

MIN

CIRCUIT

AMPS

17.2

25.2

18.3

9.7

33.5

23.9

14.9

39.0

29.0

18.2

41.0

MAX

FUSE/

HACR

25

40

25

15

50

35

20

60

45

25

60

REHEAT

PUMP

FLA

0.8

0.8

0.8

0.7

1.07

1.07

1.07

1.07

1.07

1.07

1.07

UNITS WITH HWR

TOTAL

UNIT

FLA

15.4

21.8

16.3

9.3

29.3

21.6

14.4

33.7

25.7

17.7

35.3

MIN

CIRCUIT

AMP

18.0

26.0

19.1

10.4

34.6

24.9

16.0

40.1

30.1

19.2

42.1

MAX

FUSE/

HACR

25

40

30

15

50

35

20

60

45

25

60

*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.

13

Y

R G G G G

G

14

Y

R G G G G

G

15

Y

R G G G G

G

16

Y

R G G G G

G

17

18

Y

R G G G G

G

Y

R G G G G

G

19

a50-8363

20

a50-8364

21

a50-8570 22

a50-8571

2 1

8 7 6 5 4 3 2 1

23

4 3 2 1

1

2

3

4

8 7 6

1

2

3

4

8

7 6

DB

LED

N

E WHIT

GREE

BLACK

RED

To WSHP Controller

Rnet Terminals (J13)

Rnet-

+12V

Rnet+

Gnd

COMPRESSOR CONTACTOR

LINE

LOAD

CAPACITOR

COMPLETE C CONTROL

TRANSFORMER

ECM CONTROL

BOARD

Fig. 25 — 50PTH,PTV,PTD Typical Single-Phase Line Voltage Power Connection

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.

Disconnect all power to the unit before performing maintenance or service. Unit may automatically start if power is not disconnected. Failure to follow this warning could cause personal injury, death, and/or equipment damage.

SENSOR

SPT

Standard

SPT Plus

SPT Pro

SPT Pro

Plus

Table 6 — SPT Sensors

PART

NUMBER

SPS

SPPL

SPP

SPPF

FEATURES

• Local access port

• No operator control

• Slide potentiometer to adjust set point

• Manual on button to override schedule

• LED to show occupied status


• LCD display


• Warmer and cooler buttons to adjust set point

• Info button to cycle through zone and outside air temperatures, set points, and local override time


• LCD display


• Warmer and cooler buttons to adjust set point

• Info button to cycle through zone and outside air temperatures, set points, and local override time


• Fan speed*

Wiring Sensors to Inputs — Sensors can be wired to the

WSHP Open controller’s inputs. See Table 5.

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.

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

2. Feed the wires through the raceway to the WSHP Open controller.

3. Connect the wires to the removable Phoenix connectors.

4. Reconnect the connectors to the board.

Field-Supplied Sensor Hardware — The WSHP Open controller is configurable with the following field-supplied sensors. See Table 5.

Table 5 — Field-Supplied Sensors for

WSHP Open Controller

SENSOR

Space Temperature Sensor

(SPT)

Outdoor Air

Temperature Sensor

Indoor Air Quality Sensor

(Separate Sensor)

Space Relative

Humidity Sensor

WARNING

NOTES

Field Installed (Must be used with

WSHP Open controller.)

Network Sensor

Required only for demand control ventilation.

Separate Sensor

NOTE: BACview 6 interface.

Handheld or Virtual BACview can be used as the user

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 6.

*The SPT Pro Plus fan speed adjustment has no effect in this application.

Wire SPT 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:

• 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 SPT 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 maximum signal integrity. See Table 7.

Table 7 — Rnet Wiring Specifications

RNET WIRING SPECIFICATIONS

Description

4 conductor, unshielded, CMP, plenum rated cable

Conductor

Maximum Length

Recommended Coloring

18 AWG

500 ft

Jacket: white

Wiring: black, white, green, red

UL Temperature

Voltage

Listing

32 to 167 F

300-vac, power limited

UL: NEC CL2P, or better

LEGEND

AWG — American Wire Gage

CMP — Communications Plenum Cable

NEC — National Electrical Code

UL — Underwriters Laboratories

24

To wire the SPT sensor to the controller:

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. Strip about 1

See Fig. 26.

/

4

in. of the inner insulation from each wire.

OUTER JACKET

.25 IN.

INNER INSULATION

Fig. 26 — Rnet Cable Wire a50-8443

3. Wire each terminal on the sensor to the same terminal on the controller. See Fig. 15-24. Table 8 shows the recommended Rnet wiring scheme.

Table 8 — Rnet Wiring

WIRE

Red

Black

White

Green

TERMINAL

+12-v

.Rnet

–

Rnet+

Gnd

NOTE: The wire should be connected 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:

1. Wire the sensor to the controller. See Fig. 15-24.

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 CO

2

levels. The WSHP Open controller uses this information to adjust the outside-air dampers 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-ohm,

1 /

4

watt, 2% tolerance resistor connected across the zone controller’s IAQ input terminals.

NOTE: Do not use a relative humidity sensor and CO

2

sensor on the same 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 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.

To wire the IAQ sensor to the controller:

1. Wire the sensor to the controller. See Fig. 15-24.

2. Install a field-supplied 250-ohm, terminals.

1 /

4

watt, 2% tolerance resistor across the controller’s RH/IAQ and Gnd

3. Verify the the RH/IAQ jumper is set to 0 to 5 vdc.

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.

NOTE: Do not use a relative humidity sensor and CO

2

sensor on the same 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

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:

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

2. Strip 1 /

4

in. of insulation from each wire.

3. Wire the sensor to the controller.

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™ 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 F. 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 selected with water temperatures below 60 F to prevent internal condensation.

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 be used with 24-volt signals — not line voltage signals.

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 hammer. 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:

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

2. The valve will draw approximately 25 to 35 VA through the “Y” signal of the thermostat.

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

25

COMPRESSOR CONTACTOR

CAPACITOR

COMPLETE C CONTROL a50-8141

TRANSFORMER

LINE

AD

LO

Y2

Y1

W

O

G

CFM

J1

S1

SW1

SW2

SW3

SW4

SW5

SW6

SW7

SW8

SW9

OFF ON

G DEHUM

TB1

R C Y2 Y1 G O W C R DH AL1 A A AL1

THERMOSTAT CONNECTION

Fig. 27 — Low Voltage Field Wiring

AQUAZONE CONTROL (Complete C Shown)

Fig. 28 — Typical Aquazone™ Control Board

Jumper Locations

TERMINAL STRIP P2

C

24 VAC

TYPICAL

WATER

VALVE

A

Fig. 29 — Typical Accessory Wiring a50-7764tf a50-8441

1

2

HEATER SWITCH

3

AMV

TACO VALVE

THERMOSTAT

Fig. 30 — AMV Valve Wiring a50-8442

Fig. 31 — Taco SBV Valve Wiring

26

Step 10 — Operate ECM Interface Board

STANDALONE — NO DDC CONTROLS — 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 commutated motor) controller. See

Fig. 32.

NOTE: Power must be off to 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).

Tables 9-13 indicate settings for the ECM interface board, followed by detailed information for each setting.

CAUTION

When the disconnect switch is closed, high voltage is present in some areas of the electrical panel. Exercise caution when working with energized equipment.

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 9.

Table 9 — Cooling Settings

DIP SWITCH

TAP SETTING

3

4

1

2

SW1

ON

ON

OFF

OFF

SW2

ON

OFF

ON

OFF

Heating — The heating setting determines the heating cfm for 50PTH,PTV,PTD units. Tap 1 is the lowest cfm setting, while tap 4 is the highest cfm setting. See Table 10.

Table 10 — Heating Settings

DIP SWITCH

TAP SETTING

1

2

3

4

SW3

ON

ON

OFF

OFF

SW4

ON

OFF

ON

OFF

CFM Adjust — The CFM Adjust setting allows four selections. The NORM setting is the factory default position. The + or – settings adjust the airflow by ±15%. The + or – settings are used to “fine tune” 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

Table 11.

Table 11 — CFM Adjust Settings

DIP SWITCH

TAP SETTING

TEST

–

+

NORM

SW7

ON

ON

OFF

OFF

SW8

ON

OFF

ON

OFF

Dehumidification Mode — The dehumidification mode setting provides field selection of humidity control. When operating in the normal mode, the cooling airflow settings are determined by the cooling tap setting in Table 12.

Table 12 — Dehumidificaton Mode Settings

TAP SETTING

NORM

Dehumid

DIP SWITCH

SW9

ON

OFF

When dehumidification is enabled, there is a reduction in airflow in cooling to increase the moisture removal of the heat pump. The Dehumidification mode can be enabled in two ways:

1. Constant Dehumidification mode: When the Dehumidification mode is selected via DIP switch, the ECM will operate with a multiplier applied to the cooling CFM settings (approximately 20 to 25% lower airflow). Any time the unit is running in the Cooling mode, it will operate at the lower airflow to improve latent capacity. The

“DEHUM” LED will be illuminated at all times. Heating airflow is not affected.

NOTE: Do not select Dehumidification mode if cooling setting is tap 1.

2. 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 mode if cooling setting is tap 1.

1/4" SPADE

CONNECTIONS

TO COMPLETE C OR

DELUXE D BOARD

THERMOSTAT

INPUT LEDS

G G G G R

THERMOSTAT

CONNECTIONS

Y

CFM COUNTER

1 FLASH PER 100 CFM

ECM MOTOR

LOW V OLTAGE

CONNECTOR

DEHUMIDIFICATION

LED

G

FAN SPEED SELECTION DIP SWITCH

Fig. 32 — ECM Interface Board Physical Layout

27

50PT

UNIT SIZE

026

038

049

064

072

MAX ESP

(in. wg)

FAN

MOTOR

(hp)

TAP

SETTING

0.50

0.50

0.75

0.75

0.75

1

1 /

/

1

1

1

2

2

1

4

3

2

1

4

3

2

1

4

3

2

1

1

4

3

2

4

3

2

Table 13 — Blower Performance Data

COOLING MODE (cfm)

Stage 1 Stage 2 Fan

730

1460

1300

1120

940

1670

1500

1280

810

725

620

520

1120

1000

860

1080

1620

1500

1400

1320

950

850

730

610

1400

1250

1080

900

1730

1550

1330

450

870

780

670

1120 560

2050 1020

1825

1580

920

790

1320 660

2190 1050

1950

1830

1700

980

910

850

475

425

370

300

700

630

540

DEHUMIDIFICATION MODE (cfm)


—

1140

1020

870

—

1300

1160

1000

—

1270

1170

1100

—

630

560

490

—

870

780

670

—

1350

1210

1040

—

1600

1430

1230

740

660

570

—

1090

980

840

—

1650

1520

1420

—

—

870

780

670

—

1020

920

790

—

1050

980

910

—

475

425

370

—

700

630

540

HEATING MODE (cfm)


730

1560

1400

1200

1010

1860

1650

1430

920

825

710

600

1120

1000

860

1200

1690

1600

1400

1240

900

1850

1650

1430

1200

2280

2050

1750

1060

950

820

690

1400

1250

1080

1470

2230

2100

1850

1620

450

870

780

670

560

1020

920

790

660

1050

980

910

850

475

425

370

300

700

630

540

WSHP OPEN CONTROLS — The ECM fan is controlled by an interface board that converts the fan speed outputs from the

WSHP Open control board to the signal used by the ECM motor (see Fig 35). The indicator LEDs allow the service technician to view the airflow mode that the WSHP Open control is commanding. The table below indicates the illuminated LEDs for each fan mode.

ECM INDICATORS LEDs

G

G + Y1

SPEED

Fan Only

Low Fan

G + Y1 + Y2 Med Fan

G + Y1 +W High Fan

NOTE: Power must be off to 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 setting (SW7 and SW8) while the unit is powered.

The WSHP Open controller provides four different airflow settings which can be set between the lowest airflow (tap 1) to the highest airflow (tap 4). The lowest three airflow settings

(Fan Only, Low, and Medium) are set using SW3 and SW 4 while the highest airflow (High) is set independently using

SW5 and SW6. This provides the ability to better adjust the fan performance of the unit to meet the required load conditions.

Cooling and Heating — The SW3 and SW4 DIP switch settings determine the fan airflow (cfm) to be used during normal

Fan Only, Cooling, Heating, and Dehumidification modes (see

Table 14A). The fan speed and airflow is independent from the compressor capacity control. During Fan Only operation, the fan will operate at the Fan Only airflow value specified in the table for the appropriate tap setting. Once either cooling or heating is required and the compressor is energized, the fan will increase the minimum airflow across the coil to the value defined by the low fan selection. Coil freeze protection and excessive discharge air temperature protection are integral parts of the WSHP Open controller function so the fan airflow can increase to medium or high airflow as required and independent of compressor capacity to prevent excessively hot or cold supply air temperature and coil freeze-up. The selection of the high fan airflow setting is independent of the other fan airflow settings and is defined in Table 14B. The high airflow must be chosen so that it is equal to or greater than the medium fan airflow. Therefore the tap setting for high fan (SW5 and SW6)

MUST equal or exceed the tap chosen for the SW3 and SW4.

Dehumidification — When Dehumidification is used, the fan operates at the airflow setting defined by the Medium Fan airflow setting and the tap position of SW3 and SW4.

CFM Adjust — The CFM Adjust setting allows the balancer to fine tune the actual airflow. SW7 and SW8 are used to set the CFM Adjustment if necessary. The NORM setting is the factory default. The (+) or (-) settings provide the ability to adjust the airflow by either +15% or -15% as needed. A test position is also provided but should not be used (see Table 11).

28

Table 14A — WSHP Open — Fan Only / Low Fan and Med Fan Airflow

50PT UNIT

SIZE

26

38

49

64

72

MAX

ESP

0.5

0.5

0.75

0.75

0.75

FAN MOTOR

HP

TAP SETTING

0.5

0.5

1

1

1

4

3

2

1

2

1

4

3

2

1

4

3

4

3

2

1

2

1

4

3

NOTE: Factory default setting shown bold.

OFF

OFF

ON

ON

OFF

OFF

ON

ON

OFF

OFF

ON

ON

SW 3

(SW 1)

OFF

OFF

ON

ON

OFF

OFF

ON

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

SW 4

(SW 2)

OFF

ON

OFF

ON

OFF

ON

OFF

ON

FAN ONLY

870

780

670

560

1020

920

780

660

475

425

370

300

700

630

540

450

1050

980

910

850

COOLING AND

HEATING LOW FAN

920

825

710

600

1120

1000

860

730

1560

1400

1200

1010

1860

1650

1430

1200

1600

1600

1400

1240

COOLING AND

HEATING MED FAN

1050

950

820

690

1400

1250

1080

900

1850

1650

1430

1200

2280

2040

1750

1470

2230

2100

1850

1620

IMPORTANT: The tap setting for high fan MUST equal or exceed the tap setting for fan only/low/med fan

Table 14B — WSHP Open — High Fan Airflow

50PT UNIT SIZE

26

38

49

64

72

MAX ESP

0.5

0.5

0.75

0.75

0.75

FAN MOTOR HP

0.5

0.5

1

1

1

TAP SETTING

4

3

2

3

2

1

4

3

2

1

4

1

4

3

2

3

2

1

1

4

NOTE: Factory default setting shown bold.

IMPORTANT: The tap setting for high fan MUST equal or exceed the tap setting for fan only/low/med fan

PRE-START-UP

System Checkout —

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.

4. Piping and system flushing is complete.

ON

OFF

OFF

ON

ON

OFF

OFF

ON

SW 5

OFF

OFF

ON

ON

OFF

OFF

ON

ON

OFF

OFF

ON

ON

ON

OFF

ON

OFF

ON

OFF

ON

OFF

SW 6

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

COOLING AND HEATING HIGH FAN

1060

950

820

690

1400

1350

1350

1350

1850

1660

1430

1350

2280

2050

1750

1470

2230

2100

1870

1670

5. Air is purged from closed loop system.

6. System is balanced as required. Monitor if necessary.

7. Isolation valves are open.

8. Water control valves or loop pumps are wired.

9. Condensate line is open and correctly pitched.

10. Transformer 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 panels are in place.

15. Return-air temperature is between 40 to 80 F heating and

50 to 110 F cooling.

29

16. Air coil is clean.

17. Control field-selected 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 recommended for both sides of the coil.

Rinse thoroughly with water.

FIELD SELECTABLE INPUTS

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.

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

Complete C Control Jumper Settings

WATER COIL FREEZE PROTECTION (FP1) LIMIT

SETTING — Select jumper 3 (JW3-FP1 Low Temp) to choose FP1 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.

AIR COIL FREEZE PROTECTION (FP2) LIMIT SET-

TING — Select 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 (JW1-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 Settings

WATER COIL FREEZE PROTECTION (FP1) LIMIT

SETTING — Select jumper 3 (JW3-FP1 Low Temp) to choose FP1 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.

AIR COIL FREEZE PROTECTION (FP2) LIMIT SET-

TING — Select 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 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

(JW1-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.

Complete C Control DIP Switches —

The Complete C control has 1 DIP (dual in-line package) switch bank with five switches labeled SW1. See Fig. 15, 17 , 19, and 21.

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. 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.

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.

30

NOTE: The alarm relay will not cycle during Test mode if switch is set to OFF, stage 2.

SWITCH 3 — Not used.

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 SETTING — Switch 5 is set to ON. Do not change the switch to OFF unless instructed to do so by the factory.

Deluxe D Control DIP Switches —

The Deluxe D control has 2 DIP (dual in-line package) switch banks. Each bank has 8 switches and is labeled either S1 or S2 on the circuit board. See Fig. 16, 18, 20, 22, and 23.

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.

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.

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

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, W1 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, W1 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.

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.

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.

Output — 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.

Boilerless Operation — Switch 7 provides selection of boilerless operation and works in conjunction 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.

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 F.

If switch 8 is set for 50 F, then the compressor will be used for heating as long as the FP1 is above 50 F. 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. If a thermal switch is being used instead of the FP1 thermistor, 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.

DIP SWITCH BANK 2 (S2) — This set of DIP switches is used to configure accessory relay options. See Fig. 16, 18, 20,

22, and 23.

Switches 1 to 3 — These DIP switches provide selection of

Accessory 1 relay options. See Table 15A for DIP switch combinations.

Switches 4 to 6 — These DIP switches provide selection of

Accessory 2 relay options. See Table 15B for DIP switch combinations.

Table 15A — DIP Switch Block S2 —

Accessory 1 Relay Options

ACCESSORY 1

RELAY OPTIONS

Cycle with Fan

Digital NSB

Water Valve — Slow Opening

OAD

Reheat — Humidistat

Reheat — Dehumidistat

LEGEND

NSB — Night Setback

OAD — Outside Air Damper

DIP SWITCH POSITION

1

On

Off

On

On

Off

Off

NOTE: All other DIP switch combinations are invalid.

2

On

On

Off

On

Off

On

3

On

On

On

Off

Off

Off

Table 15B — DIP Switch Block S2 —

Accessory 2 Relay Options

ACCESSORY 2

RELAY OPTIONS

Cycle with Compressor

Digital NSB

Water Valve — Slow Opening

OAD

DIP SWITCH POSITION

4 5 6

On

Off

On

On

On

On

On

On

Off

On

On

Off

LEGEND

NSB — Night Setback

OAD — Outside Air Damper

NOTE: All other switch combinations are invalid.

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.

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

Units with Modulating Hot Water Reheat

(HWR) Option

STANDALONE — NO DDC CONTROLS — 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

31 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 non-heat pump (Y,W) thermostats.

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.

Table 16 — Humidistat/Dehumidistat Logic and

Deluxe D DIP Switch Settings

Sensor 2.1

2.2

2.3

Logic

Reheat

(ON) - H

Humidistat Off Off Off Reverse 0 VAC

Dehumidistat Off On Off Standard 24 VAC

Reheat

(OFF) - H

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:

• Fan Only

• Cooling Stage 1

• Cooling Stage 2

• Heating Stage 1

• Heating Stage 2

• Reheat Mode

WSHP OPEN CONTROLS — A heat pump equipped with the hot water reheat option and the WSHP Open controller, operates in three modes: Cooling, Heating and Dehumidification. Cooling and Heating modes follow the standard water source heat pump operation with the reversing valve controlling the operating mode (Heating or Cooling) and the compressor.

The hot water reheat option uses the Deluxe D board and the optional humidity sensor to provide dehumidification operation that is separate from the standard heating or cooling cycle. The Dehumidification mode is active when the value of the humidity sensor exceeds the appropriate (occupied or unoccupied) humidity setpoint in the WSHP Open controller. When this occurs, the WSHP Open controller outputs a signal to the

H terminal of the Deluxe D board which starts dehumidification with hot water reheat. The WSHP Open controller also sets the fan to operate at the airflow defined by the medium fan speed and the tap setting of SW3 and SW4. Dehumidification is ONLY active when neither cooling nor heating is required and the humidity sensor value exceeds the humidity setpoint.

Also, both the HWR option and the Optional RH sensor must be set to Enable in the WSHP Open control for dehumidification.

HWR APPLICATION CONSIDERATIONS — Unlike most hot gas reheat options, the HWR option will operate over a wide range of entering-water temperatures (EWTs).

Special flow regulation (water regulating valve) is not required for low EWT conditions. However, below 55 F, supply-air temperatures cannot be maintained at 72 F because the cooling capacity exceeds the reheat coil capacity at low water temperatures. Below 55 F, essentially all water is diverted to the reheat coil (no heat of rejection to the building loop). Although the HWR option will work fine with low EWTs, overcooling of the space may result with well water systems or, on rare occasions, with ground loop

(geothermal) systems (NOTE: Extended range units are required for well water and ground loop systems). Since dehumidification is generally only required in cooling, most

ground loop systems will not experience overcooling of the supply-air temperature. If overcooling of the space is a concern (e.g., computer room well water application), auxiliary heating may be required to maintain space temperature when the unit is operating in the dehumidification mode.

Water source heat pumps with HWR should not be used as makeup air units. These applications should use equipment specifically designed for makeup air.

HWR COMPONENT FUNCTIONS — The proportional controller operates on 24 VAC power supply and automatically adjusts the water valve based on the supply-air sensor. The supply-air sensor senses supply-air temperature at the blower inlet, providing the input signal necessary for the proportional control to drive the motorized valve during the reheat mode of operation. The motorized valve is a proportional actuator/threeway valve combination used to divert the condenser water from the coax to the hydronic reheat coil during the reheat mode of operation. The proportional controller sends a signal to the motorized valve based on the supply-air temperature reading from the supply air sensor.

The loop pump circulates condenser water through the hydronic reheat coil during the reheat mode of operation (refer to

Fig. 33). In this application, the loop pump is only energized during the reheat mode of operation. The hydronic coil is utilized during the reheat mode of operation to reheat the air to the set point of the proportional controller. Condenser water is diverted by the motorized valve and pumped through the hydronic coil by the loop pump in proportion to the control set point.

The amount of reheating is dependent on the set point and how far from the set point the supply air temperature is. The factory set point is 70 to 75 F, generally considered "neutral" air.

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 time 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.

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.

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.

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

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.

CAUTION

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.

Table 17 — HWR Operating Modes

MODE

No Demand

Fan Only

Cooling Stage 1

Cooling Stage 2

Cooling and Dehumidistat †

Dehumidistat Only

Heating Stage 1

Heating Stage 2

Heating and Dehumidistat**

O

On/Off

On/Off

On

On

On

On/Off

Off

Off

Off

G

Off

On

On

On

On

Off

On

On

On

*Not applicable for single stage units; Full load operation for dual capacity units.

†Cooling input takes priority over dehumidify input.

INPUT

Y1

Off

Off

On

On

On

Off

On

On

On

Y2*

Off

Off

Off

On

On/Off

Off

Off

On

On/Off

H

Off

Off

Off

Off

On

On

Off

Off

On

O

On/Off

On/Off

On

On

On

On

Off

Off

Off

G

Off

On

On

On

On

On

On

On

On

OUTPUT

Y1

Off

Off

On

On

On

On

On

On

On

Y2*

Off

Off

Off

On

On/Off

On

Off

On

On/Off

Reheat

Off

Off

Off

Off

Off

On

Off

Off

Off

**Deluxe D is programmed to ignore the H demand when the unit is in heating mode.

NOTE: On/Off is either on or off.

32

a50-8145

Water Out

(To Water Loop)

Mixing Valve

Water In

(From Water Loop)

Refrigerant In

(Cooling)

Internal Pump

COAX

Refrigerant Out

(Cooling)

Entering Air

Leaving

Air

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

Evaporator Coil

Reheat

Coil

START-UP

Use the procedure outlined below to initiate proper unit start-up.

NOTE: This equipment is designed for indoor installation only.

Operating Limits

ENVIRONMENT — 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.

POWER SUPPLY — A voltage variation of ± 10% of nameplate utilization voltage is acceptable.

UNIT STARTING 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: These operating limits 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.

WARNING

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.

1. Restore power to system.

2. Turn thermostat fan position to ON. Blower should start.

Fig. 33 — HWR Schematic

3. Balance airflow at registers.

4. Adjust all valves to the full open position and turn on the line power to all heat pump units.

5. Operate unit in the cooling cycle first, then the heating cycle. Refer to Table 18 for unit operating limits. Allow 15 minutes between cooling and heating tests for pressure to equalize.

NOTE: Two factors determine the operating limits of a unit: entering-air temperature and water 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.

Table 18 — Operating Limits —

50PTH, PTV, PTD Units

AIR LIMITS

Min. Ambient Air

Rated Ambient Air

Max. Ambient Air

Min. Entering Air

Rated Entering Air db/wb

Max. Entering Air db/wb

WATER LIMITS

Min. Entering Water

Normal Entering Water

Max. Entering Water

LEGEND db — Dry Bulb

wb — Wet Bulb

COOLING (F)

45

80

100

50

80/67

110/83

30

50-110

120

HEATING (F)

40

70

85

40

70

80

20

30-70

90

NOTE: Value in heating column is dry bulb only. Any wet bulb reading is acceptable.

33

Scroll Compressor Rotation —

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:

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.

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

1. Turn off power 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.

NOTE: There is a 5-minute time delay before the compressor will start.

Unit Start-Up Cooling Mode

1. Adjust the unit thermostat to the warmest position.

Slowly reduce the thermostat position until the compressor activates.

2. Check for cool air delivery at unit grille a few minutes after the unit has begun to operate.

3. 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. Check the temperature of both supply and discharge water. Compare to Tables 20-23. If temperature is within range, proceed. If temperature is outside the range, check the cooling refrigerant pressures in Tables 20-23.

5. Check air temperature drop across the coil when compressor is operating. Air temperature drop should be between 15 and 25 F.

Unit Start-Up Heating Mode

NOTE: Operate the unit in heating cycle after checking the cooling cycle. Allow 5 minutes between tests for the pressure or reversing valve to equalize.

1. Turn thermostat to lowest setting and set thermostat switch to HEAT position.

2. Slowly turn the thermostat to a higher temperature until the compressor activates.

3. Check for warm air delivery at the unit grille within a few minutes after the unit has begun to operate.

4. Check the temperature of both supply and discharge water. Compare to Tables 20-23. If temperature is within range, proceed. If temperature is outside the range, check the heating refrigerant pressures in Tables 20-23.

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 19 — Water Temperature Change

Through Heat Exchanger

WATER FLOW RATE (GPM)

For Closed Loop: Ground Source or

Cooling/Boiler Systems at 3 gpm/ton

For Open Loop: Ground Water Systems at

1.5 gpm/ton

COOLING

RISE (F)

HEATING

DROP (F)

Min Max Min Max

9 12 4 8

20 26 10 17

Table 20 — Typical 50PTH,PTV,PTD026 Unit Operating Pressures and Temperatures

ENTERING

WATER

TEMP (F)

(EWT)

30

50

70

90

110

1.5

2.25

3

1.5

2.25

3

1.5

2.25

3

1.5

2.25

3

1.5

2.25

3

WATER

FLOW

(Gpm/Ton)

FULL LOAD COOLING WITHOUT HWG ACTIVE

Suction

Pressure

(psig)

118-128

118-128

118-128

128-138

128-138

128-138

136-146

136-146

136-146

139-149

139-149

139-149

143-153

143-153

143-153

Discharge

Pressure

(psig)

159-179

146-166

132-152

186-206

172-192

158-178

281-301

267-287

253-273

368-388

354-374

340-360

465-485

450-470

433-453

Superheat

(F)

25-30

25-30

25-30

18-23

18-23

18-23

7-12

7-12

7-12

6-11

6-11

6-11

6-11

6-11

6-11

Subcooling

(F)

9-14

7-12

7-12

8-13

6-11

6-11

7-12

5-10

4- 9

7-12

5-10

5-10

7-12

5-10

5-10

Water

Temp

Rise

(F)

16.7-18.7

12.3-14.3

7.9- 9.9

16.3-18.3

12.1-14.1

7.8- 9.8

15.7-17.7

11.6-13.6

7.6- 9.6

14.9-16.9

11.0-13.0

7.2- 9.2

13.9-15.9

10.2-12.2

6.5- 8.5

Air

Temp

Drop (F)

DB

19-25

20-26

20-26

19-25

20-26

20-26

19-25

19-25

19-25

18-24

18-24

18-24

17-23

17-23

17-23

FULL LOAD HEATING WITHOUT HWG ACTIVE

Suction

Pressure

(psig)

73- 83

75- 85

78- 88

102-112

106-116

110-120

128-138

134-144

141-151

162-172

166-176

171-181

—

—

—

Discharge

Pressure

(psig)

273-293

275-295

277-297

302-322

303-323

305-325

330-350

332-352

334-354

367-387

372-392

377-397

—

—

—

Superheat

(F)

6-11

6-11

6-11

8-12

8-12

8-12

10-15

10-15

10-15

14-19

15-20

17-22

—

—

—

Subcooling

(F)

3- 8

3- 8

3- 8

6-11

6-11

6-11

10-15

—

—

—

Water

Temp

Drop

(F)

5.9- 7.9

4.2- 6.2

2.7- 4.7

8.9-10.9

6.7- 8.7

4.5- 6.5

8-13 11.3-13.3

8-13

8-13

8.5-10.5

5.8- 7.8

10-15 14.4-16.4

10-15 10.8-12.8

7.1- 9.1

—

—

—

Air

Temp

Rise (F)

DB

16-22

17-23

18-24

22-28

23-29

23-29

27-34

28-35

28-35

33-41

34-42

34-42

—

—

—

LEGEND

DB — Dry Bulb


— — No heating operation in this temperature range

34


ENTERING

WATER

TEMP (F)

(EWT)

30

50

70

90

110

WATER

FLOW

(Gpm/Ton)

1.5

2.25

3

1.5

2.25

3

1.5

2.25

3

1.5

2.25

3

1.5

2.25

3


Suction

Pressure

(psig)

120-130

119-129

119-129

Discharge

Pressure

(psig)

156-176

148-168

138-158

Superheat

(F)

25-30

25-30

25-30

Subcooling

(F)

Water

Temp

Rise

(F)

9-14 22.1-24.1

8-13 16.8-18.8

8-13 10.5-12.5

Air

Temp

Drop (F)

DB

18-24

19-25

19-25

129-139

128-138

128-138

136-146

135-145

135-145

140-150

140-150

140-150

145-155

145-155

145-155

225-245

211-231

197-217

302-322

283-303

265-285

390-410

369-389

349-369

488-508

467-487

447-467

15-20

15-20

15-20

9-14

9-14

9-14

7-12

8-13

8-13

7-12

8-13

8-13

10-15

9-14

9-14

13-18

21.9-23.9

16.1-18.1

10.3-12.3

13-18 21.5-23.5

12-17 15.8-17.8

12-17 10.0-12.0

13-18 20.5-22.5

8-13 14.9-16.9

8-13 9.3-11.3

19.0-21.0

8-13 14.0-16.0

8-13 9.0-11.0

18-24

19-25

19-25

18-24

19-25

19-25

17-23

17-23

17-23

17-23

17-23

17-23

LEGEND

DB — Dry Bulb



69- 79


Suction

Pressure

(psig)

Discharge

Pressure

(psig)

293-313

73- 83 297-317

76- 86 300-320

Superheat

(F)

7-12

7-12

7-12

Subcooling

(F)

14-19

14-19

14-19

Water

Temp

Drop

(F)

8.9-10.9

6.7- 8.7

4.5- 6.5

Air

Temp

Rise (F)

DB

17-23

18-24

19-25

96-106 322-342

100-110 326-346

105-115 331-351

123-133

129-139

135-145

157-167

169-179

181-191

—

—

—

352-372

358-378

364-384

390-410

399-419

408-428

—

—

—

10-15

10-15

10-15

11-16

11-16

11-16

—

—

—

17-22 12.2-14.2

17-22

17-22

9.3-11.3

6.4- 8.4

19-24 15-17

19-24 11.6-13.6

19-24 8.2-10.2

13-18 18-23 21-23

13-18 16.5-21.5 15.5-17.5

14-19 15-20 10.5-12.5

—

—

—

—

—

—

23-29

24-30

24-30

28-35

29-36

30-37

36-44

37-45

39-47

—

—

—


ENTERING

WATER

TEMP (F)

(EWT)

30

50

70

90

110

WATER

FLOW

(Gpm/Ton)

1.5

2.25

3

1.5

2.25

3

1.5

2.25

3

1.5

2.25

3

1.5

2.25

3


Suction

Pressure

(psig)

Discharge

Pressure

(psig)

Superheat

(F)

Subcooling

(F)

Water

Temp

Rise

(F)

Air

Temp

Drop (F)

DB

112-122

111-121

111-121

125-135

123-133

122-132

133-143

132-142

131-141

187-207

167-187

147-167

242-262

224-244

205-225

310-330

290-310

270-290

22-27

22-27

23-28

13-18

13-18

14-19

8-13

8-13

9-14

14-19

10-15

8-13

7-12

5-10

20.7-22.7

12-17 15.5-17.5

11-16 10.2-12.2

20.9-22.9

9-14 15.6-17.6

7-12 10.2-12.2

20.5-22.5

15.2-17.2

9.9-11.9

18-24

18-24

18-24

19-25

19-25

19-25

19-25

19-25

19-25

138-148

137-147

136-146

144-154

143-153

142-152

396-416

374-394

352-372

497-517

472-492

447-467

7-12

7-12

7-12

7-12

7-12

7-12

7-12 19.2-21.2

6-11 14.3-16.3

4- 9 9.3-11.3

5-10 18.0-20.0

4- 9 13.3-15.3

3- 8 8.5-10.5

18-24

18-24

18-24

17-23

17-23

17-23

LEGEND

DB — Dry Bulb




Suction

Pressure

(psig)

Discharge

Pressure

(psig)

Superheat

(F)

Subcooling

(F)

Water

Temp

Drop

(F)

Air

Temp

Rise (F)

DB

66- 76

123-133

130-140

137-147

286-306

69- 79 289-309

72- 82 292-312

93-103 314-334

98-108 320-340

103-113 326-346

344-364

354-374

361-381

7-12

7-12

7-12

8-13

8-13

8-13

9-14

9-14

9-14

8-13

9-14

9-14

10-15

10-15

10-15

9-14

9-14

9-14

8-10

6- 8

4- 6

11.5-13.5

8.7-10.7

5.9- 7.9

15-17

11.5-13.5

7.9- 9.9

18-24

19-25

19-25

23-29

24-30

25-31

28-35

29-36

30-37

165-175

175-185

185-195

—

—

—

390-410

401-421

413-433

—

—

—

13-18

15-20

17-22

—

—

—

8-13 19.6-21.6

8-13 15-17

8-13 10.3-12.3

—

—

—

—

—

—

37-45

38-46

39-47

—

—

—

Table 23 — Typical 50PTH,PTV,PTD064,072 Unit Operating Pressures and Temperatures

ENTERING

WATER

TEMP (F)

(EWT)

30

50

70

90

110

WATER

FLOW

(Gpm/Ton)

1.5

2.25

3

1.5

2.25

3

1.5

2.25

3

1.5

2.25

3

1.5

2.25

3


Suction

Pressure

(psig)

Discharge

Pressure

(psig)

Superheat

(F)

Subcooling

(F)

Water

Temp

Rise

(F)

Air

Temp

Drop (F)

DB

117-127

116-126

115-125

128-138

126-136

125-135

135-145

134-144

133-143

139-149

138-148

138-148

144-154

143-153

142-152

170-190

143-163

135-155

238-258

222-242

205-225

315-335

296-316

276-296

408-428

386-406

364-384

515-535

493-513

469-489

27-32

28-33

29-34

16-21

21-26

26-31

10-15

12-17

15-20

10-15

10-15

10-15

8-13

8-13

8-13

15-20 18.2-20.2

13-18 12.6-14.6

12-17 7.0- 9.0

14-19 20.5-22.5

13-18 14.9-16.9

12-17 9.2-11.2

14-19 21.0-23.0

13-18 15.5-17.5

11-16 10.0-12.0

15-20 20.1-22.1

13-18 14.8-16.8

11-16 9.5-11.5

14-19 19.0-21.0

13-18 14.0-16.0

12-17 9.0-11.0

17-23

17-23

17-23

21-27

21-27

21-27

22-28

22-28

22-28

21-27

21-27

21-27

20-26

20-26

20-26

LEGEND

DB — Dry Bulb




Suction

Pressure

(psig)

Discharge

Pressure

(psig)

Superheat

(F)

Subcooling

(F)

Water

Temp

Drop

(F)

Air

Temp

Rise (F)

DB

66- 76 282-302

69- 79 285-305

72- 82 289-309

90-100 310-330

95-105 313-333

99-109 316-336

115-125

120-130

126-136

337-357

341-361

345-365

157-167

161-171

166-176

—

—

—

390-410

394-414

398-418

—

—

—

10-16

10-16

10-16

11-17

11-17

11-17

12-18

12-18

12-18

15-20

15-20

15-20

—

—

—

9-14

9-14

10-15

12-17

12-17

12-17

14-19

15-20

15-20

—

—

—

8-10

6- 8

4- 6

11.3-13.3

8.5-10.5

5.7- 7.7

14-16

14-19 10.6-12.6

7.3- 9.3

14-19 18.2-20.2

14-19 13.9-15.9

9.6-11.6

—

—

—

19-25

19-25

20-26

24-30

25-31

26-32

28-35

29-36

30-37

37-45

38-46

39-47

—

—

—

35

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 BACview 6 required. See Fig. 34.

display is

NOTE: If the WSHP Open control has lost its programming, all display pixels will be displayed on the SPT sensor. See the

WSHP Third Party Integration Guide.

When the unit is OFF, the SPT sensor will indicate OFF.

When power is applied, the SPT sensor will indicate temperature in the space at 78 F.

To start-up a unit with WSHP Open controls:

1. To plug in the BACview 6 handheld display into a SPT sensor, point the two ears on the connector up and tilt the bottom of the plug toward you. Insert the plug up into the

SPT sensor while pushing the bottom of the plug away from you.

2. 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.

4. To set the Clock if it is not already displayed: a. Select System Settings from the Home screen, then press Clockset.

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

c. Scroll to day, month and year using arrow keys.

Use number keypad to set date.

5. To set Daylight Savings Time (DST): a. Push the DST softkey. The display will indicate

02:00:060 which is equal to 2:00AM.

b. 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.

c. Use number keys to select the day of month and year.

d. Push the OK softkey to finalize the data.

6. To view configuration settings: a. Select the Config softkey.

b. 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.

7. To view unit configuration settings: a. Select the Unit Configuration softkey, then select

Unit.

b. 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. To set local schedules: a. Select the Schedule softkey from the Configuration screen, then press enter.

b. Select Weekly, then press enter (7 schedules available).

c. Select day and press enter.

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

e. Enter ON/OFF time, then press continue.

a50-8444

Fig. 34 — BACview 6 Display Interface

*Sponsored by ASHRAE (American Society of Heating, Refrigerating and Air Conditioning Engineers).

36

f. Press OK to apply and save to a particular day of the week.

g. Continue to add the same or different schedule specific 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

9. Go back to Home Screen.

10. Remove BACview 6 cable from SPT sensor by reversing the process in Step 1.

11. Perform system test.

Flow Regulation —

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 24. 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 24 — Coaxial Water Pressure Drop

UNIT 50PTH, PTV,

PTD

026

038

049

064,072

GPM

11.0

12.0

7.0

10.5

14.0

8.0

9.0

5.5

8.3

15.0

4.0

6.0

7.0

8.0

4.0

6.0

3.9

4.5

0.5

1.9

3.9

4.8

5.1

1.2

2.6

4.5

5.7

1.1

2.2

30 F

1.5

3.1

4.1

WATER TEMPERATURE (F)

50 F

1.3

2.6

3.4

70 F

Pressure Drop (psi)

1.1

2.3

3.0

90 F

1.0

2.1

2.7

4.3

1.0

2.5

4.2

5.2

0.9

2.1

3.8

0.8

2.3

4.0

4.8

0.8

2.0

3.4

0.6

2.1

3.7

4.4

0.7

1.8

3.6

4.2

0.3

1.8

3.5

4.3

3.2

3.8

0.2

1.7

3.2

3.9

3.1

3.5

0.1

1.6

2.9

3.5

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.

WARNING

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.

Flushing —

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:

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.

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.

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 summer 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 24.

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 commonly 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 F. Therefore, the freeze protection should be at 15 F (30 F – 15 F = 15 F).

IMPORTANT: All alcohols should be pre-mixed and pumped from a reservoir outside of the building or introduced under water level to prevent fuming.

Calculate the total volume of fluid in the piping system. See

Table 25. Use the percentage by volume in Table 26 to determine the amount of antifreeze to use. Antifreeze concentration should be checked from a well-mixed sample using a hydrometer to measure specific gravity.

FREEZE PROTECTION SELECTION — The 30 F FP1 factory setting (water) should be used to avoid freeze damage to the unit.

Once antifreeze is selected, the JW3 jumper (FP1) should be clipped on the control to select the low temperature (antifreeze 13 F) set point to avoid nuisance faults.

37

Table 25 — Approximate Fluid Volume (gal.) per 100 Ft of Pipe

PIPE

Copper

Rubber Hose

Polyethylene

DIAMETER (in.)

1

1.25

1.5

1

3

/

4

IPS SDR11

1 IPS SDR11

1 1 /

1 /

2 IPS SDR11

1 1 /

1 1

4

IPS SDR11

2

IPS SDR11

/

4

IPS SCH40

2

IPS SCH40

2 IPS SCH40

VOLUME (gal.)

4.1

6.4

9.2

3.9

2.8

4.5

8.0

10.9

18.0

8.3

10.9

17.0

LEGEND

IPS — Internal Pipe Size

SCH — Schedule

SDR — Standard Dimensional Ratio

NOTE: Volume of heat exchanger is approximately 1.0 gallon.

Table 26 — Antifreeze Percentages by Volume

ANTIFREEZE

Methanol (%)

100% USP Food Grade

Propylene Glycol (%)

Ethenol

MINIMUM TEMPERATURE FOR

FREEZE PROTECTION (F)

10

25

15

21

20

16

25

10

38

29

30

25

22

20

15

14

Cooling Tower/Boiler 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.

Ground Coupled, Closed Loop and Plateframe

Heat Exchanger Well Systems —

These systems allow water temperatures from 30 to 110 F. The external loop field is divided up into 2 in. polyethylene supply and return lines. Each line has valves connected in such a way that upon system start-up, each line can be isolated for flushing using only the system pumps. Locate air separation in the piping system prior to the fluid re-entering the loop field.

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.

Units with Aquazone™ Complete C Control

STANDBY — Y 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.

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 compressor calls the random start delay is omitted.

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.

NOTE: On all subsequent compressor calls the random start delay is omitted.

38

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 immediately turned on. EH2 will turn on after 10 minutes of continual stage 2 demand.

NOTE: EH2 will not turn on (or if on, will turn off) if FP1 temperature is greater than 45 F and FP2 is greater than 110 F.

LOCKOUT MODE — The 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.

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

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 immediately turned on. EH2 will turn on after 5 minutes of continual emergency heat demand.

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.

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 immediately turn on. If there is a Fan 2 demand, the Fan Enable and Fan Speed will immediately turn on.

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 immediately.

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.


Enable and Compressor relays are remain on. The Fan Speed relay is turned on immediately 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 application, all compressor relays and related functions will operate per their associated DIP switch 2 setting on S1.


Enable, Fan Speed and Compressor relays remain on. The EH1 output is turned on immediately. With continuing Heat Stage 3 demand, EH2 will turn on after 10 minutes. EH1 and EH2 are turned off immediately when the Heating Stage 3 demand is removed. The control reverts to Heating Stage 2 mode.

The output signal EH2 will be off if FP1 is greater than 45 F

AND FP2 (when shorted) is greater than 110 F during Heating

Stage 3 mode. This condition will have a 30-second recognition time. Also, during Heating Stage 3 mode, EH1, EH2, Fan

Enable, and Fan Speed will be ON if G input is not active.

EMERGENCY HEAT — In Emergency Heat mode, the Fan

Enable and Fan Speed relays are turned on. The EH1 output is turned on immediately. With continuing Emergency Heat demand, EH2 will turn on after 5 minutes. Fan Enable and Fan

Speed relays are turned off after a 60-second delay. The control reverts to Standby mode.

Output EH1, EH2, Fan Enable, and Fan Speed will be ON if the G input is not active during Emergency Heat mode.

COOLING STAGE 1 — In Cooling Stage 1 mode, the Fan

Enable, compressor and RV relays are turned on immediately.

If configured as stage 2 (DIP switch set to OFF) then the compressor and fan will not turn on until there is a stage 2 demand.

The Fan Enable and compressor relays are turned off immediately 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.

COOLING STAGE 2 — In Cooling Stage 2 mode, the Fan

Enable, compressor and RV relays remain on. The Fan Speed relay is turned on immediately and turned off immediately 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.

NIGHT LOW LIMIT (NLL) STAGED HEATING — In NLL staged Heating mode, the override (OVR) input becomes active and is recognized as a call for heating and the control will immediately 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.

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 CO

2

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.

SCHEDULING — Scheduling 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 tant, i-Vu ®

6 , Field Assis-

Open, or a third party control system to enable/disable the BAS (Building Automation System) on/off point. 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:

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 be disabled by going to Config, then Unit, then Occupancy

Schedules and changing the point from enable to disable then clicking OK.

or a third party control system to enable/disable the BAS on/off point. The BAS point can

NOTE: This point must be enabled in order for the i-Vu Open,

Field Assistant, or BACview schedule to the controller.

6 control system to assign a time

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.

39

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.

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 communication and the BAS scheduling function once the Occupancy Schedules have been disabled.

NOTE: Scheduling can either be controlled via the unit or the

BAS, but not both.

INDOOR FAN — The indoor fan will operate in any one of three modes depending on the user configuration selected.

Fan mode can be selected as Auto, Continuous, or Always

On. In Auto mode, the fan is in intermittent operation during both occupied and unoccupied periods. Continuous fan mode is intermittent during unoccupied periods and continuous during occupied periods. Always On mode operates the fan continuously during both occupied and unoccupied periods. In the default mode, Continuous, the fan will be turned on whenever any one of the following is true:

• The unit is in occupied mode as determined by its occupancy status.

• There is a demand for cooling or heating in the unoccupied mode.

• There is a call for dehumidification (optional).

When power is reapplied after a power outage, there will be a configured time delay of 5 to 600 seconds before starting the fan. There are also configured fan delays for Fan On and Fan

Off. The Fan On delay defines the delay time (0 to 30 seconds; default 10) before the fan begins to operate after heating or cooling is started while the Fan Off delay defines the delay time (0 to 180 seconds; default 45) the fan will continue to operate after heating or cooling is stopped. The fan will continue to run as long as the compressors, heating stages, or the dehumidification relays are on. If the SPT failure alarm or condensate overflow alarm is active; the fan will be shut down immediately regardless of occupancy state or demand.

Automatic Fan Speed Control — The WSHP Open controller is capable of controlling up to three fan speeds using the ECM

(electronically commutated 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 temperature increase above or below the set point required to increase the fan speed is user configurable in the set point.

The Low Fan speed range is configured by the width of the

Yellow (for cooling) and Light Blue (for heating) setpoint bands. The fan will operate at low speed as long as the space temperature remains within the yellow or light blue band range. The Medium Fan speed range is determined by the Orange and Dark Blue setpoint band. The fan will operate at medium speed when the space temperature enters this range. If the space temperature rises or falls into the red range, the fan will operate at High Fan speed.

As the temperature returns toward setpoint, a configurable hysteresis is used to prevent the fan from changing speeds erratically. The default value is 0.5° F (shown above).

Also, the control will increase the fan speed as the Supply

Air Temperature approaches the configured Minimum or Maximum SAT limits.

Fan Speed Control (During Heating) — Whenever heat is required and active, the control continuously monitors the supply-air temperature to verify it does not rise above the config-

ured 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.

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 algorithm. 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 algorithm to run:

• Cooling is set to Enable.

• 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.

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 minimum

SAT limit, the fan will be indexed to the next higher speed.

Should this be insufficient and if the SAT falls further (equal to

 mum SAT limit, 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.

There is a 5-minute off time 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 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-air temperature has increased above the minimum supplyair temperature limit.

The WSHP Open controller provides a status input to monitor the compressor operation. The status is monitored to determine if the compressor status matches the commanded 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.

40

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 algorithm. 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 algorithm to run:

• 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.


• 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 maximum SAT limit, the fan will be indexed to the next higher speed. Should this be insufficient, and the SAT rises further reaching the maximum heating SAT limit, the fan will be

 disabled.

During Heating mode, the reversing valve output will be held in the heating position (either B or O type as configured) even after the compressor is stopped. The valve will not switch position until the Cooling mode is required.

The configuration screens contain the maximum SAT parameter as well as heating lockout based on outdoor-air temperature (OAT); both can be adjusted to meet various specifications.

There is a 5-minute off time 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 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-air temperature has fallen below the maximum supply air temperature limit.

The WSHP Open controller provides a status input to monitor the compressor operation. The status is monitored to determine if the compressor status matches the commanded 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.

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 limit.

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 limit. The heat stage will also be subject to a 2-minute minimum OFF time to prevent excessive valve cycling.

Single Stage Electric Auxiliary Heat — The control can operate a field-installed single stage of electric heat installed on 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.

INDOOR AIR QUALITY (IAQ) AND DEMAND CON-

TROLLED 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 CO

2

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 CO

2

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 CO

2

level is at or above the maximum 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 algorithm to run:

• Damper control is configured for DCV.

• The unit is in an occupied mode.

• The IAQ sensor reading is greater than the DCV start control set point.

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.

DEHUMIDIFCATION — The WSHP Open controller will provide occupied and unoccupied dehumidification only on

41 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.

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 screen. The following conditions must be true for economizer operation:

• SAT reading is available.

• LWT reading is available.

• If occupied, the SPT is greater than the occupied cooling set point or less than the occupied heating set point and the condenser water is suitable.


• If unoccupied, the SPT is greater than the unoccupied cooling set point or less than the unoccupied heating set point and the condenser water is 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.

Cooling — The purpose is to provide an economizer cooling



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.

Heating — Additionally, the control will modulate the water

 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 limit, 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.

Cooling — The purpose is to provide a cooling economizer

 space temperature). If the optional coil is provided and the water loop conditions are suitable, then the valve will open to pro-

vide 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.

Heating — Additionally, the economizer control will open the

 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.

DEMAND LIMIT — The WSHP Open controller has the ability to accept three levels of demand limit from the network.

In response to a demand limit, the unit will decrease its heating set point and increase its cooling set point to widen the range in order to immediately 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.

CONDENSER WATER LINKAGE — The control provides optimized water loop operation using an universal 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 override. At each WSHP, 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 occurring. 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 WSHP. Meanwhile, the WSHPs will not operate if the loop pump status is off and therefore the WSHP compressor will not run.

COMPLETE C AND DELUXE D BOARD

SYSTEM TEST

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

Test Mode —

To enter Test mode, cycle the fan 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 off during Test mode. See Tables 27 and 28.

To exit Test mode, short the terminals for 3 seconds or cycle the fan 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.

Table 27 — Complete C Control Current LED

Status and Alarm Relay Operations

LED STATUS

On

Off

Slow Flash

Fast Flash

DESCRIPTION OF OPERATION

Normal Mode

Normal Mode with

PM Warning

ALARM RELAY

Open

Cycle

(closed 5 sec., open 25 sec.)

Open

Slow Flash

Complete C Control is non-functional

Fault Retry

Lockout

Over/Under Voltage Shutdown

Flashing Code 1 Test Mode — No fault in memory

Flashing Code 2

Test Mode —

HP Fault in memory

Flashing Code 3

Flashing Code 4

Flashing Code 5

Flashing Code 6

Flashing Code 7

Flashing Code 8

Flashing Code 9

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

Test Mode — PM in memory

Test Mode — FP1/FP2

Swapped Fault in memory

Open

Closed

Open,

(Closed after

15 minutes)

Cycling Code 1

Cycling Code 2

Cycling Code 3

Cycling Code 4

Cycling Code 5

Cycling Code 6

Cycling Code 7

Cycling Code 8

Cycling Code 9

LEGEND

CO — Condensate Overflow

FP — Freeze Protection

HP — High Pressure

LED — Light-Emitting Diode

LP — Low Pressure

PM — Performance 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.

Table 28 — Complete C Control LED Code and

Fault Descriptions

LED

CODE

1

2

3

4

5

6

7

(Autoreset)

8

9

FAULT DESCRIPTION

No fault in memory

High-Pressure Switch

Low-Pressure Switch

Freeze Protection Coax

— FP1

Freeze Protection Air Coil —

FP2

Condensate overflow

Over/Under Voltage

Shutdown

PM Warning

FP1 and FP2

Thermistors are swapped

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

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


(bypassed for first 60 seconds of operation)

Sense overflow (grounded) for


"R" power supply is <19VAC or

>30VAC

Performance Monitor Warning has occurred.

FP1 temperature is higher than

FP2 in heating/test mode, or

FP2 temperature is higher than

FP1 in cooling/test mode.

LEGEND


HP — High Pressure


LP — Low Pressure

PM — Performance Monitor

42

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.

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.

AUXILIARY HEATING TEST — Tests auxiliary heat.

Sequences fan on and enables heating coil for 1 minute.

H

2

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

OPEN VENT DAMPER 100% TEST — Tests outside air

(OA) damper operation.

PREPOSITION OA DAMPER — Prepositions OA damper actuator to set proper preload.

NOTE: The auxiliary heating test, H

2

O economizer test, open vent damper 100% test, and preposition OA damper features will not be visible on the screen unless configured.

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

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™ Deluxe D Control LED Indicators —

There are 3 LED indicators on the Deluxe D control:

STATUS LED — Status LED indicates the current status or mode of the D control. The Status LED light is green.

TEST LED — Test 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 29.

Table 29 — Aquazone Deluxe D Control Current LED Status and Alarm Relay Operations

DESCRIPTION

Normal Mode

Normal Mode with PM

Deluxe D Control is non-functional

Test Mode

Night Setback

ESD

Invalid T-stat Inputs

No Fault in Memory

HP Fault

LP Fault

FP1 Fault

FP2 Fault

CO Fault

Over/Under Voltage

HP Lockout

LP Lockout

FP1 Lockout

FP2 Lockout

CO Lockout

STATUS LED

(Green)

On

On

Off

—

Flashing Code 2

Flashing Code 3

Flashing Code 4

On

Slow Flash

Slow Flash

Slow Flash

Slow Flash

Slow Flash

Slow Flash

Fast Flash

Fast Flash

Fast Flash

Fast Flash

Fast Flash

TEST LED

(Yellow)

Off

Off

Off

Off

Off

Off

Off

Off

Off

Off

Off

Off

On

—

—

—

Off

Off

Off

LEGEND

CO — Condensate Overflow

ESD — Emergency Shutdown


HP

LP

PM

— High Pressure

— Low Pressure

— Performance Monitor

FAULT LED (Red)

Flash Last Fault Code in Memory

Flashing Code 8

Off





Flashing Code 1

Flashing Code 2

Flashing Code 3

Flashing Code 4

Flashing Code 5

Flashing Code 6

Flashing Code 7

Flashing Code 2

Flashing Code 3

Flashing Code 4

Flashing Code 5

Flashing Code 6

ALARM RELAY

Open

Cycle (closed 5 sec, open 25 sec, …)

Open

Cycling Appropriate Code

—

—

—

Open

Open

Open

Open

Open

Open

Open (closed after 15 minutes)

Closed

Closed

Closed

Closed

Closed

NOTES:

1. If there is no fault in memory, the Fault LED will flash code 1.

2. Codes will be displayed with a 10-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.

43

SERVICE

Perform the procedures outlined below periodically, as indicated.

WARNING

To prevent injury or death due to electrical shock or contact with moving parts, open unit disconnect switch before servicing unit.

IMPORTANT: When a compressor is removed from this unit, system refrigerant circuit oil will remain in the compressor. To avoid leakage of compressor oil, the refrigerant lines of the compressor must be sealed after it is removed.

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.

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.

Filters —

Filters must be clean for maximum performance.

Inspect filters every month under normal operating conditions.

Replace when necessary.

IMPORTANT: Units should never be operated without a filter.

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.

Inspect heat exchangers regularly, and clean more frequently if the unit is located in a “dirty” environment. 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 in the heat exchanger during off cycles. Closed loop systems must have a minimum of 15 psig during the summer and 40 psig during the winter.

Check P trap frequently for proper operation.

CAUTION

To avoid fouled machinery and extensive unit clean-up,

DO NOT operate units without filters in 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.

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.

Check to see that unit is within the superheat and subcooling temperature ranges shown in Tables 20-23. If the unit is not within these ranges, recover and reweigh in refrigerant charge.

Compressor —

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 in 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.

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.

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 in an open water tower system due to induced contaminants.

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

Proper water treatment can minimize tube fouling and pitting. If such conditions are anticipated, water treatment analysis is recommended. Refer to the Carrier System Design

Manual, Part 5, for general water conditioning information.

CAUTION

Follow all safety codes. Wear safety glasses and rubber gloves when using inhibited hydrochloric acid solution.

Observe and follow acid manufacturer’s instructions.

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 METHOD — Do not add solution faster than vent can exhaust the generated gases.

When condenser is full, allow solution to remain overnight, then drain condenser and flush with clean water. Follow acid manufacturer’s instructions. See Fig. 35.

FORCED CIRCULATION METHOD — Fully open vent pipe when filling condenser. The vent may be closed when condenser is full and pump is operating. See Fig. 36.

Regulate flow to condenser with a supply line valve. If pump is a nonoverloading type, the valve may be fully closed while pump is running.

For average scale deposit, allow solution to remain in condenser overnight. For heavy scale deposit, allow 24 hours.

Drain condenser and flush with clean water. Follow acid manufacturer’s instructions.

44

FILL CONDENSER WITH

CLEANING SOLUTION. DO

NOT ADD SOLUTION

MORE RAPIDLY THAN

VENT CAN EXHAUST

GASES CAUSED BY

CHEMICAL ACTION.

VENT

PIPE

FUNNEL

1”

PIPE

5’ APPROX

3’ TO 4’

PAIL

CONDENSER

PUMP

PAIL

Fig. 35 — Gravity Flow Method

PRIMING

CONN.

GAS VENT

GLOBE

VALVES

SUCTION

PUMP

SUPPORT

SUPPLY

1” PIPE

CONDENSER

TANK

REMOVE WATER

REGULATING VALVE

FINE MESH

SCREEN

RETURN

Fig. 36 — Forced Circulation Method

Checking System Charge —

Units are shipped with full operating charge. If recharging is necessary:

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 line near compressor.

3. After unit conditions have stabilized, read head pressure on discharge line gage.

NOTE: Operate unit a minimum of 15 minutes before checking charge.

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

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

6. Compare the subcooling temperature with the normal temperature listed in Tables 20-23. 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

WARNING

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

NOTE: Do not vent or depressurize unit refrigerant to atmosphere. Remove and recover refrigerant following accepted practices.

Air Coil Fan Motor Removal

CAUTION

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

Disconnect motor power wires from motor terminals before motor is removed from unit.

1. Shut off unit main power supply.

2. Loosen bolts on mounting bracket so that fan belt can be removed.

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

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.

Replacing the WSHP Open Controller’s Battery —

The WSHP Open controller’s 10-year lithium

CR2032 battery provides a minimum of 10,000 hours of data retention during power outages.

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

1. Remove the battery from the controller, making note of the battery's polarity.

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

TROUBLESHOOTING

When troubleshooting problems with a WSHP, consider the following:

Thermistor —

A thermistor may be required for singlephase units where starting the unit is a problem due to low voltage. See Fig. 37 for thermistor nominal resistance.

Control Sensors —

The control system employs 2 nominal 10,000 ohm 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.

45

90.0

80.0

70.0

60.0

50.0

40.0

30.0

20.0

10.0

0.0

0.0

20.0

40.0

60.0

80.0

100.0

120.0

140.0

Temperature (degF)

Fig. 37 — Thermistor 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:

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. 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 reset once alarm condition has been corrected.

See Table 32 for possible alarm cause and solution.

Thermostatic Expansion Valves —

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

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.

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 common failure mode of a 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.

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.

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 almost 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.

CAUTION

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.

AIRFLOW

(

°F)

AIR

COIL

THERMISTOR

AIRFLOW

( °F)

FP2

EXPANSION

VALVE

FP1

COAX

CONDENSATE

OVERFLOW

(CO)

AIR COIL

FREEZE

PROTECTION

LIQUID

LINE

WATER IN

WATER

COIL

PROTECTION

LEGEND

COAX — Coaxial Heat Exchanger

Airflow

Refrigerant Liquid Line Flow

WATER OUT

Fig. 38 — FP1 and FP2 Thermistor Location

46

SUCTION

COMPRESSOR

DISCHARGE

The bulb must be secured to the pipe using a copper strap.

The use of heat transfer paste between the bulb and the pipe will also help ensure optimum performance.

The bulb must also be properly insulated to eliminate any influence on valve operation by the surrounding conditions.

Cork tape is the recommended insulation as it can be molded tight to the bulb to prevent air infiltration.

Causes of TXV Failure — The most common causes of TXV failure are:

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, tubing, and service tools, or improper techniques used during brazing operations and component replacement.

Problems associated with particulate debris can be compounded by refrigerant systems that use POE (polyol ester oil). POE oil has solvent-like properties that will clean the interior surfaces of tubing 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. Contamination can be the result of improper service techniques, use of contaminated components, and/or improper evacuation of the system.

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

• Low refrigerant suction pressure

• High refrigerant superheat

• High refrigerant subcooling

• TXV and/or low pressure tubing 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 an analysis for a failed TXV the following must be verified:

• Confirm that there is proper water flow and water temperature in the heating mode.

• Confirm that there is proper airflow and temperature in the cooling mode.

• Ensure coaxial water coil is clean on the inside; 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.

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 compatible with the refrigerant in the system

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

3. Refrigerant pressure-temperature chart for the refrigerant used

To determine 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.

• LOW suction pressure, LOW subcooling 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 subcooling and superheat to verify a failed valve or refrigerant charge issue.

Repair

WARNING

Puron ® 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.

WARNING

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 adjustment and can lead to damage to the valve or equipment, unintended venting of refrigerant, personal injury, or possibly death.

CAUTION

Always recover the refrigerant from the system with suitable approved tools, recovery equipment, and practices prior to attempting to remove or repair any TXV.

CAUTION

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.

47

CAUTION

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

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.

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.

See Tables 30-32 for additional troubleshooting information.

CAUTION

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

Table 30 — ECM Troubleshooting

FAULT

Motor rocks slightly when starting

Motor will not start

DESCRIPTION

This is normal start-up for ECM.

SOLUTION

No movement Check power at motor.

Check low voltage (24-vac R to C) at motor.

Check low voltage connections (G,Y, W, R, C) at motor.

Check for unseated pins in connectors on motor harness. See Fig. 39.

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.


Motor oscillates up and down while being tested off of blower

It is normal for motor to oscillate with no load on shaft.

Motor starts, but runs erratically Varies up and down or intermittent Check line voltage for variation or “sag.”

Check low voltage connections (G,Y, W, R, C) at motor, unseated pins in motor harness connectors. See Fig. 39.

“Hunts” or “puffs” at high cfm

(speed)

Check “Bk” for erratic cfm command (in variable speed applications).

Check system controls, thermostat.

Perform moisture check. See Moisture Check section in Troubleshooting.

If removing panel or filter reduces “puffing,” reduce restriction or reduce maximum airflow.

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

Check low voltage (thermostat) wires and connections.

Excessive noise

Stays at high cfm

Blower will not shut off

Noisy blower or cabinet

Verify fan is not in delay mode. Wait until delay is complete.

Check to see if “R” is missing/not connected at motor.


Check to see if “R” is missing/not connected at motor.

Verify fan is not in delay mode. Wait until delay is complete.


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

Determine if it’s 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 deformaton.

If removing panel or filter reduces “puffing,” reduce restriction or reduce maximum airflow.

Evidence of moisture

“Hunts” or “puffs” at high cfm

(speed)

Motor failure or malfunction has occurred and moisture is present

Evidence of moisture present inside air mover

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

Perform moisture check. See Moisture Check section in Troubleshooting.

48

Fig. 39 — ECM Pin Connectors

49 a50-8448

Stopped or Malfunctioned ECM Motor —

Refer to Fig. 40 to determine the possible cause of a stopped or malfunctioned ECM motor. Follow the instructions in the boxes.

Fig. 40 — ECM Troubleshooting Flow Diagram

50 a50-8447

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 if condensate drain is plugged.

• Check for low airflow (too much latent capacity).

• Check for undercharged condition.

• Check and plug leaks in return ducts, cabinet.

Table 31 — Good Practices

DO

Check motor, controls wiring, and connections thoroughly before replacing motor.

Orient connectors down so water cannot get in. Install “drip loops.”

Use authorized motor and control model numbers for replacement.

DO NOT

Automatically assume the motor is bad.

Locate connectors above 7 and 4 o’clock positions.

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

Use high pressure drop filters.

Use restricted returns.

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.

Size equipment wisely.

Check orientation before inserting motor connectors.

Oversize system then compensate with low airflow.

Plug in power connector backwards.

Force plugs.

Table 32 — WSHP Troubleshooting

FAULT

Main Power Problems

HP Fault — Code 2

High Pressure

LP/LOC Fault — Code 3

Low Pressure/Loss of

Charge

FP1 Fault — Code 4

Water Freeze Protection

FP2 Fault — Code 5

Air Coil Freeze Protection

Condensate Fault —

Code 6

HEATING COOLING

X X

X

X

X

X

X

X

X

X

X

X

X

POSSIBLE CAUSE SOLUTION

Green Status LED Off 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.

Check primary/secondary voltage on transformer.

Reduced or no water flow in cooling Check pump operation or valve operation/setting.

Check water flow adjust to proper flow rate.

Bring water temperature within design parameters.

Water temperature out of range in cooling

Reduced or no airflow in heating Check for dirty air filter and clean or replace.

Check fan motor operation and airflow restrictions.

Dirty air coil — construction dust etc.

External static too high. Check blower performance per Tables 9-13.

Air temperature out of range in heating Bring return-air temperature within design parameters.

Overcharged with refrigerant Check superheat/subcooling vs typical operating condition per

Tables 20-23.

Bad HP switch

Insufficient charge

Check switch continuity and operation. Replace.

Check for refrigerant leaks.

Compressor pump down at start-up Check charge and start-up water flow.

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

Reduced or no water flow in heating Check pump operation or water valve operation/setting.

Inadequate antifreeze level

Improper freeze protect setting (30

F vs 10

F)

Water temperature out of range

Bad thermistor

Plugged strainer or filter. Clean or replace.


Check antifreeze density with hydrometer.

Clip JW2 jumper for antifreeze (10

F) use.

Bring water temperature within design parameters.

Check temperature and impedance correlation.

Reduced or no airflow in cooling

Air temperature out of range

Check for dirty air filter and clean or replace.



Too much cold vent air. Bring entering air temperature within design parameters.

Normal airside applications will require 30 F only.

Improper freeze protect setting (30

F vs 10 F)

Bad thermistor

Blocked drain

Improper trap

Poor drainage

Moisture on sensor

Check temperature and impedance correlation.

Check for blockage and clean drain.

Check trap dimensions and location ahead of vent.

Check for piping slope away from unit.

Check slope of unit toward outlet.

Poor venting. Check vent location.

Check for moisture shorting to air coil.

LEGEND


RV — Reversing Valve

TXV — Thermostatic Expansion Valve

51

Table 32 — WSHP Troubleshooting (cont)

FAULT

Over/Under Voltage —

Code 7 (Auto Resetting)

Performance Monitor —

Code 8

FP1 and FP2 Thermistors

— Code 9

No Fault Code Shown

Swapped Thermistor —

Code 9

Unit Short Cycles

Only Fan Runs

Only Compressor Runs

Unit Does Not Operate in

Cooling

Insufficient Capacity/

Not Cooling or Heating

Properly

HEATING COOLING

X X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

POSSIBLE CAUSE

Under voltage

Over voltage

Heating mode FP2>125

F

Cooling mode FP1>125

F OR

FP2<40

F

FP1 temperature is higher than FP2 temperature.

FP2 temperature is higher than FP1 temperature.

No compressor operation

Compressor overload

Control board

FP1 and FP2 swapped

SOLUTION

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 tap for correct power supply voltage.

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

Check 24 vac and unit transformer tap for correct power supply voltage.

Check for poor airflow or overcharged unit.

Check for poor water flow or airflow.

Swap FP1 and FP2 thermistors.

Swap FP1 and FP2 thermistors.

See Scroll Compressor Rotation section.

Check and replace if necessary.

Reset power and check operation.

Reverse position of thermistors.

Dirty air filter

Unit in 'Test Mode'

Unit selection

Compressor overload

Thermostat position

Unit locked out

Compressor overload

Thermostat wiring

Thermostat wiring

Check and clean air filter.

Reset power or wait 20 minutes for auto exit.

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

Check and replace if necessary.

Ensure thermostat set for heating or cooling operation.

Check for lockout codes. Reset power.

Check compressor overload. Replace if necessary.

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

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

Fan motor relay

Fan motor

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

Jumper G and R for fan operation. Check for line voltage across BR contacts.

Check fan power enable relay operation (if present).

Check for line voltage at motor. Check capacitor.

Reversing valve

Thermostat setup

Thermostat wiring

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 for 'O' RV setup not 'B'.

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

Dirty filter Replace or clean.




Reduced or no airflow in cooling Check for dirty air filter and clean or replace.


Leaky ductwork

Low refrigerant charge


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

Check superheat and subcooling per Tables 20-23.

Restricted metering device

Defective reversing valve

Check superheat and subcooling per Tables 20-23. Replace.

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.

Thermostat improperly located

Unit undersized Recheck loads and sizing check sensible cooling load and heat pump capacity.

Scaling in water heat exchanger Perform condenser cleaning.

Inlet water too hot or cold Check load, loop sizing, loop backfill, ground moisture.

X

X

LEGEND




52

Table 32 — WSHP Troubleshooting (cont)

FAULT

High Head Pressure

Low Suction Pressure

Low Discharge Air

Temperature in Heating

High Humidity

Low Refrigerant Suction

Pressure

High Refrigerant Superheat

High Refrigerant

Subcooling

TXV and/or Low Pressure

Tubing Frosting

Equalizer Line Condensing or Frosting

HEATING COOLING

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

POSSIBLE CAUSE SOLUTION




Reduced or no water flow in cooling

Check pump operation or valve operation/setting.

Check water flow adjust to proper flow rate. See Tables 19 and 24.

Inlet water too hot Check load, loop sizing, loop backfill, ground moisture.

Air temperature out of range in heating

Bring return-air temperature within design parameters.

Scaling in water heat exchanger Perform condenser cleaning.

Unit overcharged Check superheat and subcooling. Reweigh in charge.

Noncondensables in system

Restricted metering device

Reduced water flow in heating

Plugged strainer or filter. Clean or replace.


Water temperature out of range Bring water temperature within design parameters.

Reduced airflow in cooling

Remove refrigerant, evacuate system and charge unit.

Check superheat and subcooling per Tables 20-23. Replace.

Check pump operation or water valve operation/setting.

Check for dirty air filter and clean or replace.



Air temperature out of range

Insufficient charge

Too high airflow

Poor performance

Too high airflow

Unit oversized

Normal operation

Too much cold vent air. Bring entering air temperature within design parameters.

Check for refrigerant leaks.

Check blower performance per Tables 9-13.

See “Insufficient Capacity.”

Check blower performance per Tables 9-13

Recheck loads and sizing check sensible cooling load and heat pump capacity.

Check/compare with unit Installation Manual for typical operating temperatures and pressures chart.

Reduced water flow

Scaling in water to refrigerant heat exchanger

Reduced airflow

Check pump operation.

Check strainer or filter.

Improper flow regulator.

Water temperature out of range Bring water temperature within proper range.

Conduct water quality analysis.

Check for dirty air filter.

Check for dirty air coil.

Check fan motor operation.

External static pressure exceeds fan operating parameters.

Return air temperature below minimum

Space temperature too cold.

Supply air bypassing to return air stream (zone systems).

Insufficient refrigerant charge

Excessive fresh air.

Check for leaking ductwork.

Locate and repair leak.

Locate bulb on suction line between reversing valve and compressor.

Improperly located TXV sensing bulb

Failed or restricted metering device


Improperly located TXV sensing bulb


Failed TXV power head, capillary or sensing bulb.

Plugged TXV strainer.


Locate bulb on suction line between reversing valve and compressor.

Excessive refrigerant charge


Normal operation






Remove refrigerant as needed.



May occur when entering water temperature is close to minimum.






LEGEND




53

SCREEN NAME

Equipment

Status

APPENDIX A — WSHP OPEN SCREEN CONFIGURATION

POINT NAME

Operating Mode

SPT

SAT

Condenser Leaving

Temperature

PASSWORD

LEVEL

EDITABLE RANGE

Off, Fan Only, Economize,

Cooling, Heating, Cont Fan,

Test, Start Delay, Dehumidify



F



F



F

DEFAULT

Condenser Entering

Temperature



F

NOTES

Displays unit operating mode

Displays SPT

Displays SAT

Displays leaving condenser water temperature

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

Fan

Compressor Capacity

No Password

Required

Off/Low Speed/

Medium Speed

High Speed/On

0 - 100%

Displays fan speed status

Damper Position

H

2

O Economizer

Auxiliary Heat

Space RH

Dehumidification

IAQ CO

2

SPT Alarm Status

Alarming SPT

SPT Alarm Limit

SPT Sensor Alarm

Status

Alarm Status

IAQ Alarm Status

Compressor Alarm

Status

SAT Alarm Status

Condensate Overflow

Alarm Status

Condenser Water Temperature Alarm Status

Filter Alarm Status

Space RH Alarm Status

OAT Alarm Status

Sensor

Calibration

Airside Linkage Status

Condenser Water

Linkage

SAT

SAT Offset

Leaving Condenser

Water Temperature

Leaving CW Offset

Rnet Sensor

Temperature

Rnet Offset

RH

RH Sensor Offset

LEGEND

BAS — Building Automation System

DCV — Demand Controlled Ventilation

IAQ — Indoor Air Quality

OAT — Outdoor Air Temperature

RH — Relative Humidity

SAT — Supply Air Temperature

SPT — Space Temperature

TPI — Third Party Integration

No Password

Required

Admin Password level access only

X

X

X

X

0 - 100%

0 - 100%

0 - 100%

0 - 100%

Inactive/Active

0 - 9999 ppm

Normal/Alarm



F



F

Normal/Alarm

Normal/Alarm

Normal/Alarm

Normal/Alarm

Normal/Alarm

Normal/Alarm

Normal/Alarm

Normal/Alarm

Normal/Alarm

Normal/Alarm

Normal/Alarm



F



F



F

%

-15% - 15% 0 %

Displays compressor capacity

Displays current damper position

(Viewable only if Ventilation DMP

Type = 2 position or DCV)

Displays position of economizer valve

Displays position of auxiliary reheat valve (Viewable only if Leaving

Air Auxiliary Heat Type = 2 position,

1 stage Elect or Modulating)

Displays space RH% (Viewable only if

Humidity Sensor = Installed)

Displays if dehumidification is active

(Viewable only if Factory

Dehumidification Reheat = Installed)

Displays the space CO

2

level

Displays current space temperature condition

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

Displays the SPT alarm limit that was exceeded; causing the alarm condition

(when SPT alarm above is in Alarm)

Displays the status of the Rnet

SPT sensor - ALARM is displayed should the sensor fail to communicate with the control module

Current IAQ/ventilation condition

Current compressor condition

Current SAT condition

Current status of the condensate drain (overflow switch)

Current status of the condenser water

Current filter condition

Current space RH condition

Current status of the OAT broadcast function

Current linkage status if enabled

Current linkage status if enabled

Display SAT

Used to correct sensor reading

Displays Leaving Condenser

Water Temperature


Displays SPT


Displays Space RH value


54

APPENDIX A — WSHP OPEN SCREEN CONFIGURATION (cont)

SCREEN NAME

Unit

Maintenance

POINT NAME

Operating Mode

Fan Operating Mode

Occupancy Status

Occupancy Control

Outside Air

Temperature

SPT

SPT Status

SPT Sensor Status

Condensate Overflow

Cooling Set Point

Heating Set Point

Set Point Adjustment

Auxiliary Heat Control

Set Point

H

2

O Economizer

Control Set Point

Calculated IAQ/

Ventilation Damper position

Active Compressor

Stages

SAT

Reset Filter Alarm

Overflow Contact

Occupancy Contact

BAS/Keypad Override

OAT Input

System Settings

BACnet

Keypad Configuration

Password

Network

BACnet Time Master

Clock Set

Override Schedules

Pushbutton Override

Occupancy

Maintenance

Schedule

Configuration

Keypad Override

Schedules

Occupancy Contact

BAS on/off

Local Occupancy

Schedules

Local Holiday

Schedules

Local Override

Schedules

BACnet Occupancy

Schedules

LEGEND









No Password required

User/Admin

Password level access

PASSWORD

LEVEL

EDITABLE RANGE

Off, Fan Only,Economize,

Cooling, Heating, Cont Fan, Test,

Start Delay, Dehumidify

Auto/Continuous/Always On

Unoccupied/Occupied

Always Occupied/Local Schedule/

BACnet Schedule/BAS Keypad/

Occupied Contact/Holiday Schedule/

Override Schedule/Pushbutton

Override/Unoccupied None



F



F

Normal/Above Limit/Below

Limit/Sensor Failure

Inactive/Connected

DEFAULT

No Password required

X

X

X

X

X

X

X

X

Normal/Alarm











F

F

F

F

F

%

0/1/2



F

No/Yes

Closed/Open

Closed/Open

Inactive/Occupied/

Unoccupied

N/A / Network

Inactive

NOTES

Displays unit operating mode

Displays how the fan is configured to operate

Displays the current occupancy status

Displays the origin of the occupancy control

Displays OAT (Viewable only if OAT is a network broadcast)

Displays SPT

Displays the SPT status

Displays the connection status of the Rnet sensor

Displays the status of the condensate overflow

Displays the actual set point being used for cooling control

Displays the actual set point being used for heating control

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

Displays the calculated set point being used for auxiliary heating control

Displays the calculated set point being used for economizer control

Displays the ventilation damper position calculated by the DCV control

Displays the actual number of compressor stages operating

Displays SAT

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

Displays the state of the condensate overflow switch contact

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

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

See TPI

Mapping

Changes password

See TPI

See TPI

Changes clock/time setting

X

X

X

X

Inactive/Active Occupied


Inactive/Active Occupied/Active

Unoccupied




Disable/Enable

Disable/Enable

Disable/Enable

Disable/Enable

Enable

Disable

Disable

Disable

Used to display the active and inactive occupancy control inputs

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

55

SCREEN NAME

Configuration

Set Points

Configuration

Schedule

Weekly Schedule

Configuration

Schedule

Exception

Schedules 1 - 12

APPENDIX A — WSHP OPEN SCREEN CONFIGURATION (cont)

POINT NAME

Occupied Heating

Occupied Cooling

Unoccupied Heating

Unoccupied Cooling

Effective Heating

Set Point

Effective Cooling

Set Point

Optimal Start

Occupied RH

Set Point

Unoccupied RH

Set Point

DCV CTRL Start

Set Point

DCV Max CTRL

Set Point

Start Time

End Time

Mon

Tue

Wed

Thur

Fri

Sat

Sun

Start Month

Start Day

Start Time

End Month

End Day

End Time

PASSWORD

LEVEL

User/Admin


User/Admin


User/Admin


EDITABLE

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

RANGE

0 - 10



F

0 - 10



F

0 - 100%

0 - 100%

0 - 9999 ppm

0 - 9999 ppm

00:00 - 23:59

00:00 - 24:00

No/Yes

No/Yes

No/Yes

No/Yes

No/Yes

No/Yes

No/Yes

0 - 12

0 - 31

00:00 - 23:59

0 - 12

0 - 31

00:00 - 24:00

DEFAULT NOTES

65%

90%

500 ppm

1050 ppm

06:00

18:00

Yes

Yes

Yes

Yes

Yes

No

No

0

0

0:00

0

0

0:00

Defines the Occupied

Heating Set Point

Defines the Occupied

Cooling Set Point

Defines the Unoccupied

Heating Set Point

Defines the Unoccupied

Cooling Set Point

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

Defines the control set point used during occupied periods (Viewable only if Humidity Sensor = Installed/

Determines when to start

Dehumidification when occupied)

Defines the control set point used during unoccupied periods

(Viewable only if Humidity Sensor =

Installed/Determines when to start

Dehumidification when unoccupied)

Defines the control set point used to start increasing ventilation during occupied periods (Viewable only if

Ventilation DMP Type = DCV)

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

Defines the ending time of an occupied period

Determines if this day is included in this schedule







Defines the start month of this hoilday schedule

Defines the start day of this holiday schedule

Determines the start time for this schedule

Defines the month to end this hoilday schedule

Defines the day to end this holiday schedule

Determines the time to end this schedule

LEGEND









56

APPENDIX A — WSHP SCREEN OPEN CONFIGURATION (cont)

SCREEN NAME

Configuration

Unit

Configuration

Configuration

Service

Test

H

POINT NAME

Fan Mode

Fan On Delay

Fan Off Delay

Heating Enable

Lockout Heating if

2

OAT >

Power Fail Restart

Delay

Occupancy Schedules

Set Point Separation

O Economizer Test

Preposition OA

Damper

Open Vent

Damper 100%

SAT

LCWT

PASSWORD

LEVEL

Cooling Enable

Minimum SAT in

Cooling

Maximum SAT in

Heating

Damper Ventilation

Position

DCV Maximum Vent

Position

Filter Alarm Timer

Pushbutton Override

SPT Sensor Set Point

Adjustment

Lockout Cooling if

OAT <


Test Mode

Fan Test

Fan Speed

Compressor Test

Dehumidification Test

Testing Compressor


Aux Heating Test

EDITABLE

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

RANGE

Auto/Continuous/

Always On

0 - 30 sec

0 - 180 sec

Disable/Enable

Disable/Enable

40 - 60



0 - 100%

0 - 100%

F

0 - 9999 hrs

Disable/Enable

Disable/Enable

0 - 600 sec

Disable/Enable

Disable/Enable

Disable/Enable

Off/Low Speed/Medium

Speed/High Speed/On

Disable/Enable

Disable/Enable

DEFAULT

Continuous

10 sec

45 sec

Enable

Enable

50



F

100%

100%

0 hrs

Enable

Enable

60 sec

Enable

Disable

Disable

Disable

Disable

NOTES

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

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

Provides capability to manually disable heating operation

Provides capability to manually disable cooling operation

Defines the minimum acceptable operating temperature for the Supply Air

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

Usually set at 100% - Used to limit maximum damper opening in DCV mode

Disables Filter Alarm if set to 0

Enables Override Feature on Rnet sensor

Enables Set Point adjustment capability on Rnet Sensor

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

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

Delay before equipment starts

Enables unit occupied

Used to enforce minimum set point separation

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

Used to test all fan speeds. Sequences fan from low to high and operates each speed for

1 minute. Resets to disable on completion

Displays current fan operation

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.

Inactive/Heating/Cooling/

Dehumidify/TimeGard

Wait

Displays compressor test mode

Disable/Enable

Disable/Enable

Disable/Enable

Disable/Enable





F

F

Disable

Disable

Disable

Disable

Used to test auxiliary heat.

Sequences fan on and enables heating coil for 1 minute. Resets to disable on completion

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

Used to preposition OA damper actuator to set proper preload

Used to test OA damper operation

Displays SAT

Displays Leaving Condenser

Water Temperature

LEGEND









57


SCREEN NAME

Configuration

POINT NAME

# of Fan Speeds

G Output Type

Compressor Stages

Reversing Valve Type

Leaving Air Auxiliary

Heat Type

Entering Air Water

Economizer Type

2-Position Water

Valve Type

Modulating Water

Valve Type

Ventilation Damper

Type

Damper Actuator Type

Humidity Sensor

PASSWORD

LEVEL

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


Heating

Minimum Condenser


Cooling

Maximum Condenser


Cooling

IAQ sensor minimum input

IAQ sensor maximum input

IAQ sensor minimum output

IAQ sensor maximum output

LEGEND










EDITABLE

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

RANGE DEFAULT NOTES

1,2,3

Fan On/Fan Low

One Stage/Two Stages

O type output/B type output

None/2-Position HW/1 Stage

Electric/Modulating HW

None/2-Position/Modulating

Normally Closed/Normally Open

Normally Closed/Normally Open

None/2-Position/DCV

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

None/Installed

None/Installed

Occupied Open/Occupied Closed

5 - 600 seconds

Alarm OPEN/Alarm CLOSED

25 - 60

30 - 60





0 - 5 ma

F

F

5 - 20 ma

0 - 9999 ppm

0 - 9999 ppm

3

Fan On

One Stage

O type

None

None

Normally

Closed

Normally

Closed

None

0-10 volt

None

None

Occupied

CLOSED

10 sec

Alarm

CLOSED

60

60





4 ma

F

F

20 ma

0 ppm

2000 ppm

Used to set number of fan motor speeds

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

Determines reversing valve signal output type

Determines Auxiliary

Reheat Coil Type

Determines Entering Air

Economizer Coil Type

Determines type of 2-position water valve used

Determines type of modulating water valve used

Determines type of ventilation damper control to be used

Used to determine ventilation damper output signal range

(closed - open)

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

Minimum output current (mA)

for IAQ sensor

Maximum output current (mA) for

IAQ sensor

Corresponding value in ppm for minimum output current

Corresponding value in ppm for maximum output current

58

SCREEN NAME


POINT NAME

SPT Occupied Alarm

Hysteresis

SPT Alarm Delay

Configuration

Alarm

Configuration

SPT Unoccupied Low

Alarm Temperature

SPT Unoccupied High

Alarm Temperature

SAT Low SAT

Alarm Limit

SAT High SAT

Alarm Limit

Condensate Overflow

Alarm Delay

Space Humidity Occupied

High Alarm Limit

Space Humidity Alarm

Delay

Space Humidity Unoccupied High Alarm Limit

IAQ/Ventilation Occupied

High Alarm Limit


IAQ/Ventilation

Alarm Delay

Rnet Sensor SPT Alarm

Rnet Sensor SAT Alarm

Rnet Sensor Compressor

Lockout Alarm

Rnet Sensor Condenser

Water Temperature Alarm

Rnet Sensor Condensate

Overflow Alarm

Rnet Sensor Dirty

Filter Alarm

Rnet Sensor Space

High Humidity Alarm

Configuration

Linkage

Loop Control Network

Number

Loop Control Network

Address

Number of Linked Heat

Pumps

LEGEND









PASSWORD

LEVEL

EDITABLE

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

RANGE

2 - 20



F

0 - 30 min per degree

5 - 600 sec

45% - 100%

0 - 30 min per % RH

45% - 100%

0 - 9999 ppm

0.1 - 1.0 min per ppm

Ignore/Display

Ignore/Display

Ignore/Display

Ignore/Display

Ignore/Display

Ignore/Display

Ignore/Display

DEFAULT NOTES

5



F

10 min

10 sec

100%

5 min

100%

1100 ppm

0.25 min

Ignore

Ignore

Display

Display

Display

Display

Ignore

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

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

Defines the fixed unoccupied ow SPT alarm limit

Defines the fixed unoccupied high SPT alarm limit

Defines the fixed minimum

SAT alarm limit

Defines the fixed maximum

SAT alarm limit

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

Defines the fixed occupied high space RH alarm limit


Defines the fixed unnoccupied high space RH alarm limit

Defines the fixed occupied high space IAQ/Ventilation 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

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

Determines if the Condenser Water

Temperature alarm is displayed on the local Rnet sensor

Determines if the Condensate

Overflow alarm is displayed on the local Rnet sensor

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

Determines if the High Space

RH alarm is displayed on the local Rnet sensor

See TPI

See TPI

See TPI

59

Copyright 2010 Carrier Corporation



Form 50PT-4SI Pg 62 7-10 Replaces: 50PT-3SI

CUSTOMER:___________________________

MODEL NO.:___________________________

50PTH,PTV,PTD

START-UP CHECKLIST

JOB NAME: _______________________________________

SERIAL NO.:____________________ DATE:_________

I. PRE-START-UP

DOES THE UNIT VOLTAGE CORRESPOND WITH THE SUPPLY VOLTAGE AVAILABLE? (Y/N)

HAVE THE POWER AND CONTROL WIRING CONNECTIONS BEEN MADE AND TERMINALS

TIGHT? (Y/N)

HAVE WATER CONNECTIONS BEEN MADE AND IS FLUID AVAILABLE AT HEAT EXCHANGER?

(Y/N)

HAS PUMP BEEN TURNED ON AND ARE ISOLATION VALVES OPEN? (Y/N)

HAS CONDENSATE CONNECTION BEEN MADE AND IS A TRAP INSTALLED? (Y/N)

IS AN AIR FILTER INSTALLED? (Y/N)

II. START-UP

IS FAN OPERATING WHEN COMPRESSOR OPERATES? (Y/N)

IF 3-PHASE SCROLL COMPRESSOR IS PRESENT, VERIFY PROPER ROTATION PER INSTRUCTIONS.

(Y/N)

UNIT VOLTAGE — COOLING OPERATION

PHASE AB VOLTS PHASE BC VOLTS

(if 3 phase)

PHASE AB AMPS PHASE BC AMPS

(if 3 phase)

PHASE CA VOLTS

(if 3 phase)

PHASE CA AMPS

(if 3 phase)

CONTROL VOLTAGE

IS CONTROL VOLTAGE ABOVE 21.6 VOLTS? (Y/N) .

IF NOT, CHECK FOR PROPER TRANSFORMER CONNECTION.

TEMPERATURES

FILL IN THE ANALYSIS CHART ATTACHED.

COAXIAL HEAT

EXCHANGER

COOLING CYCLE:

FLUID IN

AIR COIL

HEATING CYCLE:

FLUID IN

COOLING CYCLE:

AIR IN

HEATING CYCLE:

AIR IN

F

F

FLUID OUT

F FLUID OUT

F AIR OUT

AIR OUT

F

F

F

F

PSI

PSI

FLOW

FLOW

CL-1

HEATING CYCLE ANALYSIS

°F

AIR

COIL

°F

EXPANSION

VALVE

COAX

PSI

°F

SAT

SUCTION

COMPRESSOR

DISCHARGE

°F

LIQUID LINE

COOLING CYCLE ANALYSIS

a50-8449

°F

FLUID IN

PSI

°F

PSI

FLUID OUT

LOOK UP PRESSURE DROP IN TABLES 20-23

TO DETERMINE FLOW RATE

PSI

°F

SAT

°F

AIR

COIL

°F

SUCTION

COMPRESSOR

EXPANSION

VALVE

COAX

DISCHARGE

°F

LIQUID LINE a50-8450

°F

FLUID IN

PSI

°F

PSI

FLUID OUT

LOOK UP PRESSURE DROP IN TABLES 20-23

TO DETERMINE FLOW RATE

HEAT OF EXTRACTION (ABSORPTION) OR HEAT OF REJECTION =

FLOW RATE (GPM) x TEMP. DIFF. (DEG. F) x FLUID FACTOR* =

(Btu/hr)

SUPERHEAT = SUCTION TEMPERATURE – SUCTION SATURATION TEMPERATURE

= (DEG F)

SUBCOOLING = DISCHARGE SATURATION TEMPERATURE – LIQUID LINE TEMPERATURE

= (DEG F)

*Use 500 for water, 485 for antifreeze.

Copyright 2010 Carrier Corporation



Form 50PT-4SI Pg CL-2 7-10 Replaces: 50PT-3SI

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