Carrier 50PTH, PTV User Manual

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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

• SO U N D AT T E N U AT I ON

• 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

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.

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

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 —

maintenance instructions are provided with each unit. Before

Installation, operation and

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) —

ed 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.

Horizontal units are design-

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

/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

UNIT 50PTH, PTV, PTD 026 038 049 064 072 COMPRESSOR (1 each) Two- St a g e, Sc r oll FACTORY CHARGE R-410A (oz) 58 78 81 144 156 ECM FAN MOTOR AND BLOWER

Fan Motor Type VAR VAR VAR VA R VAR Fan Motor (Hp)

Blower Wheel Size (D x W) (in.) 9 x 7 11 x 10 11x10 11x10 11x10 COAXIAL COIL VOLUME (gal.) .76 .92 1.24 1.56 1.56 WATER CONNECTION SIZE (FPT) (in.) HWG CONNECTION SIZE (FPT) (in.) VERTICAL

Air Coil

Dimensions (H x W) (in.) 28 x 20 28 x 25 32 x 25 36 x 25 36 x 25 Filter Standard — 1-in. Throwaway

(Qty — Size) (in.)

Weight (lb)

Operating 266 327 416 443 443 Packag ed 276 337 426 453 453

HORIZONTAL

Air Coil

Dimensions (H x W) (in.) 18 x 31 20 x 25 20 x 40 20 x 45 20 x 45 Filter Standard — 1-in. Throwaway

(Qty — Size) (in.)

Weight (lb)

Operating 266 327 416 443 443 Packag ed 276 337 426 453 453

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

/2 and 3/4-in. electrical knockouts.

1 — 28 x 24 1 — 28 x 30 2 — 16 x 30

2 — 18 x 18

1 — 12 x 20 1 — 20 x 24

111

1 — 18 x 20 1 — 20 x 24

1 — 16 x 30 1 — 20 x 30

2 — 20 x 24 2 — 20 x 24

1 — 16 x 30 1 — 20 x 30

Y Configuration - Left Return/Back Discharge

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

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

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

Left View

Right View

Size

Right View

ASP

BSP

Blower Outlet

Air Coil Side

Front

BSP

Left Discharge

Back Discharge

Condensate 3/4” FPT

CSP

Front

2 Service Access

Right Return

2 Service Access

3.25”

CAP

Powe r Supply 3/4” Knockout

1/2”

Knockout

Low Voltage

1/2” Knockout

Front

CSP

ASP

Left Return

Right Discharge

Back Discharge

Condensate 3/4” FPT

2 Service Access

Air Coil Side

Blower Outlet

BSP

Blower Outlet

CSP

Front Front

Air Coil

1.1”

Air Coil

ASP

Front

CSP

BSP

Blower Outlet

3.25”

1.6”

, 072

NOTES:

1. Condensate connection is stainless steel

/4 in. female pipe thread (FPT).

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

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

50PTH

UNIT

OVERALL CABINET

(in.)

WATER CONNECTIONS (in.)

WATER

CONNEC-

TIONS (in.)

- UNITS

WITH HWR

ELECTRICAL

KNOCKOUTS (in.)

DISCHARGE CONNECTIONS (in.)

DUCT FLANGE INSTALLED

( 0.10 in.)

RETURN CONNECTION

USING AIR COIL

OPENING (in.)

WidthBDepthCHeight

123 4 5

Loop

Wate r

FPT (in.)

HWG

FPT (in.)

/2-in.

Cond

/2-in.

Cond

/4-in.

Cond

M (LH rtn)

NOSupply

Height

Supply

Width

Q (RH rtn)

RSReturn

Width

T Return Height

DInE

Out

HWG

Out

H Condensate

Loop

in D

Loop out E

Low

Vol ta ge

Ext

Pump

Power

Supply

026 22.4 62.2 19.3 2.1 10.0 13.9 16.9 3.53/

/22.1 10.0 3.6 6.1 8.6 3.6 2.0 12.5 15.5 3.6 2.0 33.8 16.2 2.3 1.5

038 25.4 71.2 21.3 3.4 10.8 14.6 18.9 3.43/

/25.96 13.13 3.4 6.1 8.6 3.1 1.2 19.0 17.5 3.1 1.0 34.8 18.2 3.1 1.5

049 25.4 76.2 21.3 3.4 10.8 15.6 18.9 3.4 11/25.96 13.13 3.6 6.1 8.6 3.1 1.2 19.0 17.5 3.1 1.0 39.8 18.2 3.1 1.5

064,072 25.4 81.2 21.3 3.4 10.8 15.6 18.9 3.4 11/25.96 13.13 3.6 6.1 8.6 3.1 1.2 19.0 17.5 3.1 1.0 44.8 18.2 3.1 1.5

CODE RETURN DISCHARGE

N Right Left

P Right Back

W Left Right

Y Left Back

LEGEND

ASP — Alternate Service Panel BSP — Blower Service Panel CAP — Control Access Panel CSP — Compressor Service Panel FPT — Female Pipe Thread HWG — Hot Water Generator HWR — Hot Water Reheat

Fig. 1 — 50PTH026-072 Dimensional Data

Field-Supplied Electric Heat (if applicable)

Filter Access

Integral hanger supportpre-attached in factory

Field-supplied transition to minimize pressure loss

3/8” threaded rods

(by others)

Return Air (Ductwork not shown)

Thermostat

Wiring

Power Wiring

Balancing Valve (fieldinstalled accessory)

Stainless steel braid hose with integral “J” swivel

3/8” Threaded

Rod (by others)

Supply Air

Insulated supply duct with at least one 90 degree elbow to reduce air noise (field-supplied)

Flexible Connection

Vibration Isolator

(white-compressor end

and red-blower end)

Washer

(by others)

Double Hex Nuts

(by others)

Unit Power

Unit Power Disconnect (by others)

Unit Hanger (factorysupplied)

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

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

(field-installed accessory)

Aux Electric Heat Disconnect

Water In

Water Out

Building

Loop

Fig. 2 — Typical Installation — 50PTH Unit

UNIT HANGER ISOLATION DETAIL

Filter Bracket

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 field-installed.

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

AIRFLOW CONFIGURATION

50PTV

UNIT

OVERALL CABINET

(in.)

WATER CONNECTIONS (in.)

WATER

CONNEC-

TIONS (in.)

- UNITS

WITH HWR

ELECTRICAL

KNOCKOUTS (in.)

DISCHARGE CONNECTIONS (in.)

DUCT FLANGE INSTALLED

( 0.10 in.)

RETURN CONNECTION

USING AIR COIL OPENING

(in.)

WidthBDepthCHeight

123 4 5

Loop

Wate r

FPT (in.)

HWG

FPT (in.)

/2-in.

Cond

/2-in.

Cond

/4-in.

Cond

M (LH rtn)

NOSupply

Width

Supply

Depth

Q (RH rtn)

RSReturn

Depth

T Return Height

DInE

Out

HWG

Out

H Condensate

Loop

in D

Loop out E

Low

Vol ta ge

Ext

Pump

Power

Supply

026 22.4 25.6 48.5 2.1 10.0 13.9 16.9 7.8

/22.1 10.0 3.6 6.1 8.6 7.2 5.8 14.0 14.0 4.9 2.2 21.1 27.2 1.0

038 25.4 30.6 50.5 3.4 10.8 15.6 18.9 7.83/

/25.96 13.13 3.6 6.1 8.6 6.4 6.3 18.0 18.0 5.3 2.2 26.1 27.2 1.0

049 25.4 30.6 54.5 3.4 10.8 15.6 18.9 7.8 11/25.96 13.13 3.6 6.1 8.6 6.4 6.3 18.0 18.0 5.3 2.2 26.1 31.2 1.0

064, 072

25.4 30.6 58.5 3.4 10.8 15.6 18.9 7.8 11/25.96 13.13 3.6 6.1 8.6 6.4 6.3 18.0 18.0 5.3 2.2 26.1 35.2 1.0

CODE RETURN DISCHARGE

J Left Top

K Right Top

LEGEND

ASP — Alternate Service Panel BSP — Blower Service Panel CAP — Control Access Panel CSP — Compressor Service Panel FPT — Female Pipe Thread HV — High Voltage HWG — Hot Water Generator HWR — Hot Water Reheat LV — Low Voltage

Fig. 3 — 50PTV Dimensional Data

Field-Installed Discharge Flange (shipped loose inside blower section)

Access Panels

Front

K - Configuration - Right Return

/Top Discharge

Front

K - Configuration - Right Return -

Air Coil Opening

(Right Side View)

Air Coil Side

(Top View)

ASP

J - Configuration - Left Return

Air Coil Side

/Top Discharge

(Top View)

Front

Air Coil

1.18”

CSP

Back Back Front

J - Configuration - Left Return -

Air Coil Opening

(Left Side View)

Air Coil

Power Supply 3/4” HV Knockout

1/2” Knockout

Low Voltage 1/2” LV Knockout

CSP

2ʼ Service Access

CSP

BSP

CAP

1.63”

Front View

Isometric View

CAP

ASP

1.00”

1.68”

Condensate 3/4” FPT

2ʼ Service Access

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

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

AIRFLOW CONFIGURATION

50PTD

UNIT

OVERALL CABINET

(in.)

WATER CONNECTIONS (in.)

WATER

CONNEC-

TIONS (in.)

- UNITS

WITH HWR

ELECTRICAL

KNOCKOUTS (in.)

DISCHARGE CONNECTIONS (in.)

DUCT FLANGE INSTALLED

( 0.10 in.)

RETURN CONNECTION (in.)

USING AIR COIL OPENING

WidthBDepthCHeight

12 3 4 5

Loop

Wate r

FPT (in.)

HWG

FPT (in.)

/2-in.

Cond

/2-in.

Cond

/4-in.

Cond

M (LH rtn)

NOSupply

Width

Supply

Depth

Q (RH rtn)

RSReturn

Depth

T Return Height

DInE

Out

HWG

Out

Cond-

ensate

Loop

in D

Loop out E

Low

Vol t ag e

Ext

Pump

Power

Supply

026 22.4 25.6 52.5 2.1 10.0 13.9 16.9 3.63/

/22.1 10.0 3.6 6.1 8.6 6.7 8.4 10.1 9.1 10.8 2.2 21.1 27.2 1.0

038 25.4 30.6 54.5 3.4 10.8 15.6 18.9 3.63/

/25.96 13.13 3.6 6.1 8.6 7.2 9.0 13.4 12.9 10.4 2.2 26.1 27.2 1.0

049 25.4 30.6 58.5 3.4 10.8 15.6 18.9 3.6 11/25.96 13.13 3.6 6.1 8.6 7.2 9.0 13.4 12.9 10.4 2.2 26.1 31.4 1.0

064,072 25.4 30.6 62.5 3.4 10.8 15.6 18.9 3.6 11/25.96 13.13 3.6 6.1 8.6 7.2 9.0 13.4 12.9 10.4 2.2 26.1 35.2 1.0

CODE RETURN DISCHARGE

J Left Bottom

K Right Bottom

LEGEND

Fig. 4 — 50PTD Dimensional Data

• Provide adequate clearance for filter replacement and

Return

Air

Power

Thermostat Wiring

Compressor Access Panel

Balancing Valve (field-installed accessory)

Low Pressure

Drop Water Control Valve (optional) (field-installed accessory)

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

Water Out

Water In

Building

Loop

Supply Air

Flexible Connection

Stainless steel braid hose with integral “J” swivel (field-installed accessory)

Return

Air

Power

Thermostat

Wiring

Compressor Access Panel

Balancing Valve

(field-installed

accessory)

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

Ball Valve with optional integral

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

Water Out

Water In

Building Loop

Supply Air

Flexible Connection

Flexible

Connection

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

NOTE: Ball valve with integral pressure temperature plug recommended.

Fig. 5 — Typical Vertical Installation — 50PTV Unit

NOTE: Ball valve with integral pressure temperature plug recommended.

Fig. 6 — Typical Downflow Installation —

50PTD Unit

Water

Connection End

Supply Duct

Return Air

Water

Connection End

Drain

Return Air

Discharge Air

Side Discharge

Back Discharge

Fig. 7 — Conversion Right Return, Side Discharge to Back Discharge

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.

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

• Locate unit in an area that allows easy access and removal

• Allow enough space for service personnel to perform

• Return air must be able to freely enter the space if unit needs

• Install the unit on a piece of rubber, neoprene or other

connections.

of filter and access panels.

maintenance.

to be installed in a confined area such as a closet.

mounting pad material for sound isolation. The pad should be at least

/8 in. [10 mm] to 1/2 in. [13 mm] in

thickness. Extend the pad beyond all four edges of the unit.

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.

Fig. 9 — 50PTV Units Mounted With

Vibration Absorption Pad

Return Air

Remove Screws

Return Air

Rotate

Move to Side

Side Discharge

Return Air

Discharge Air

Drain

Back Discharge

Replace Screws

Water

Connection End

Water

Connection End

Water

Connection End

Fig. 8 — Conversion Left Return,

Side Discharge to Back Discharge

5. Check refrigerant tubing for contact with other components. Adjust if necessary.

6. Reinstall top panel using screws set aside in Step 1. NOTE: Location for some screws at bottom of discharge

panel may have to be changed.

7. Manually spin fan wheel to check for obstructions. Adjust for any obstruction found.

8. Replace access panel.

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

— Follow instructions

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.

Step 5 — Check Duct System — Size the duct sys-

tem 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 ventila-

tion requirement of the space.

Step 6 — Install Condensate Drain

HORIZONTAL UNIT (50PTH) — Slope the unit toward the drain at quired pitch, install a condensate at the unit to pump condensate to building drain.

ternal 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.

/4 in. See Fig. 10. If it is not possible to meet the re-

Horizontal units are not internally trapped, therefore an ex-

Each unit must be installed with its own individual vent and

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

Fig. 11 — Trap Condensate Drain

Alternate Condensate Location

Vent

1/4” per foot slope to drain

3/4” Copper FPT/PVC

Water Connections

1/2”

3/4” PVC

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

Fig. 12 — Vertical Condensate Connection

1/4” Pitch for Drainage

Drain Connection

Pitch Toward Drain

Fig. 10 — Horizontal Unit Pitch

means to flush or blow out the condensate drain line. Do not install units with a common trap or vent.

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.

• 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, consid-

er the following for system piping:

• Piping systems using water temperatures below 50 F

• Avoid all plastic to metal threaded fittings due to the poten-

• Teflon tape thread sealant is recommended to minimize

• 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

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

• Connect boiler drains and other valves using a “T” connec-

• Do not overtighten connections.

• Route piping to avoid service access areas to unit.

• Use PVC SCH80 or copper piping material.

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

require

/2-in. closed cell insulation on all piping surfaces to

eliminate condensation.

tial to leak. Use a flange fitted substitute.

internal fouling of the heat exchanger.

and foreign materials from the system.

temperature.

tor to allow acid flushing for the heat exchanger.

Water Supply and Quantity

Boiler Drains (field-installed)

Strainer (field-installed accessory) (16 to 20 mesh recommended for filter sediment)

Shut-Off Valve (field-installed accessory)

Water Control Valve (field-installed accessory)

Flow Regulator (field-installed accessory)

Pressure

Ta nk

Water Out

Water In From Pump

Fig. 13 — Typical Ground-Water Piping Installation

— 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 poten-

tial to leak. Use a flange fitted substitute.

• Do not overtighten connections.

• Route piping to avoid service access areas to unit.

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

pressure drop. INSTALLATION OF SUPPLY AND RETURN HOSE

KIT — Follow these piping guidelines.

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.

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.

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.

CAUTION

Table 2 — Water Quality Guidelines

Rib Crimped

Length

(2 ft Length Standard)

Swivel Brass Fitting

Brass Fitting

MPT

Fig. 14 — Supply/Return Hose Kit

CONDITION

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

Index Limits for Probable Scaling Situations (Operation outside these limits is not recommended.)

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

Langelier Saturation Index

Iron Fouling

(Ferrous)

Iron Fe (Bacterial Iron Potential)

Iron Fouling

Corrosion Prevention††

Hydrogen Sulfide (H

Ammonia Ion as Hydroxide, Chloride, Nitrate and Sulfate Compounds

Maximum Chloride Levels Maximum allowable at maximum water temperature.

Erosion and Clogging

Particulate Size and Erosion

Brackish

HWG — Hot Water Generator HX — Heat Exchanger N/A — Design Limits Not Applicable Considering Recirculating

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.

Pota ble Wate r

LEGEND

MATERIAL*

All N/A pH < 7.5 and Ca Hardness, <100 ppm

All N/A

All

All N/A

Copper N/A

Cupronickel N/A <150 ppm

304 SS N/A <400 ppm 316 SS N/A <1000 ppm

Titanium N/A >1000 ppm

All

All N/A

CLOSED RECIRCULATING† OPEN LOOP AND RECIRCULATING WELL**

6.0 - 7.5

–0.5 to +0.5

<0.2 ppm (Ferrous)

<0.5 ppm of Oxygen

6 - 8.5

<0.5 ppm

75 F (24 C) 100 F (38 C)

NR NR

NR NR <250 ppm <150 ppm <550 ppm <375 ppm >550 ppm >375 ppm

6 - 8.5

Monitor/treat as needed.

<10 ppm of particles and a

maximum velocity of 6 fps.

Filtered for maximum

800 micron size.

If >7.5 minimize steel pipe use.

Based upon 150 F HWG and direct well, 85 F indirect well HX.

If Fe

(ferrous) >0.2 ppm with pH 6 - 8, O2<5 ppm check for iron bacteria.

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

At H

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

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

50 F (10 C)

<20 ppm

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

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

††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.

If <–0.5 minimize steel pipe use.

Above this level deposition will occur.

Rotten egg smell appears at 0.5 ppm level.

Table 3 — Metal Hose Minimum Bend Radii

HOSE DIAMETER (in.) MINIMUM BEND RADII (in.)

21/

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.

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

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

1371

= 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

457

= 1.53%

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.

Table 4 — 50PTH,PTV,PTD Electrical Data

50PTH,

PTV, PTD

UNITS

026 208/230-1-60 197/254 10.3 52.0 4.3 14.6 17.2 25 0.8 15.4 18.0 25

038

049

064

072 208/230-1-60 197/254 27.2 150.0 7.0 34.2 41.0 60 1.07 35.3 42.1 60

FLA — Full Load Amps HACR — Heating, Air Conditioning and Refrigeration LRA — Locked Rotor Amps RLA — Rated Load Amps HWR — Hot Water Reheat

V-P H- Hz *

208/230-1-60 197/254 16.7 82.0 4.3 21.0 25.2 40 0.8 21.8 26.0 40 208/230-3-60 197/254 11.2 58.0 4.3 15.5 18.3 25 0.8 16.3 19.1 30

460-3-60 414/506 4.5 29.0 4.1 8.6 9.7 15 0.7 9.3 10.4 15 208/230-1-60 197/254 21.2 96.0 7.0 28.2 33.5 50 1.07 29.3 34.6 50 208/230-3-60 197/254 13.5 88.0 7.0 20.5 23.9 35 1.07 21.6 24.9 35

460-3-60 414/506 6.4 41.0 6.9 13.3 14.9 20 1.07 14.4 16.0 20 208/230-1-60 197/254 25.6 118.0 7.0 32.6 39.0 60 1.07 33.7 40.1 60 208/230-3-60 197/254 17.6 123.0 7.0 24.6 29.0 45 1.07 25.7 30.1 45

460-3-60 414/506 9.0 62.0 6.9 15.9 18.2 25 1.07 17.7 19.2 25

LEGEND *The 460-v units using an ECM (electronically commutated motor) fan

VO LTAGE

MIN/MAX

COMPRESSOR

RLA LRA

FAN

MOTOR

FLA

TOTAL

UNIT FLA

MIN

CIRCUIT

AMPS

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.

MAX FUSE/ HACR

REHEAT

PUMP

FLA

UNITS WITH HWR

TOTAL

UNIT

FLA

MIN

CIRCUIT

AMP

MAX FUSE/ HACR

ECM

GGGGR

HUM

BM ECM

ECM

INTERFACE

BOARD

BM ECM

AL — Alarm Relay Contacts

ASTAT — Aquastat

BM — Blower Motor

BR — Blower Relay

CB — Circuit Breaker

CC — Compressor Contactor

CO — Sensor, Condensate Overflow

DTS — Discharge Temp Switch

ECM — Electronically Commutated Motor

FP1 — Sensor, Water Coil Freeze Protection

FP2 — Sensor, Air Coil Freeze Protection

HP — High-Pressure Switch

HWG — Hot Water Generator

JW1 — Jumper, Alarm

LOC — Loss of Charge Pressure Switch

MV — Motorized Valve

NEC — National Electrical Code

P1 — Field Wiring Terminal Block

RVS — Reversing Valve Solenoid

TRANS — Transformer

NOTES:

1. Compressor and blower motor thermally protected internally.

2. All wiring to the unit must comply with NEC and local codes.

3. Transformer for 208/230 v will be connected for 208 v operation. For 230 v operation, dis-

connect RED lead at L1 and attach ORN lead to L1. Insulate open end of RED lead. Trans-

former for 220/240 v will be connected for 220 v operation. For 240 v operation, disconnect

RED lead at L1 and attach ORN lead to L1. Transformer is energy limiting or may have cir-

cuit breaker.

4. FP1 thermistor provides freeze protection for water. When using antifreeze solutions, cut

JW3 jumper.

5. Typical Aquazone™ thermostat wiring shown. Refer to thermostat installation instructions

for wiring to the unit. Thermostat wiring must be Class 1 and voltage rating equal to or

greater than unit supply voltage.

6. 24-v alarm signal shown. For dry alarm contact, cut JW1 jumper and dry contact will be

available between AL1 and AL2.

7. Transformer secondary ground via Complete C board standoffs and screws to control box.

(Ground available from top two standoffs as shown.)

8. Aquastat is field-supplied and must be wired in series with the hot leg to the pump. Aqua-

stat is rated for voltage up to 277 v.

9. Place jumpers on 2 and 3, ECM board, when dehumidification mode is used.

LEGEND

Field Line Voltage Wiring

Field Low Voltage Wiring

Printed Circuit Trace

Optional Wiring

Relay/Contactor Coil

Condensate Pan

Solenoid Coil

Temperature Switch

Thermistor

Ground

Wire Nut

Fig. 15 — Wiring of 50PTH,PTV,PTD026-072 Units with Complete C Controller, Single Phase (208/230 V)

ECM INTERFACE BOARD LAYOUT

GGGGR

OFF

DEH

BM (ECM)

ECM

INTERFACE

BOARD

SW1

OFF

(ECM)

AL — Alarm Relay Contacts

ASTAT — Aquastat

BM — Blower Motor

CAP — Capacitor

CB — Circuit Breaker

CC — Compressor Contactor

CO — Sensor, Condensate Overflow

COMPR — Compressor

DDC — Direct Digital Control

DTS — Discharge Temp Switch

ECM — Electronically Commutated Motor

FP1 — Sensor, Water Coil Freeze Protection

FP2 — Sensor, Air Coil Freeze Protection

HP — High-Pressure Switch

HWG — Hot Water Generator

JW1 — Jumper, Alarm

NSB — Digital Night Setback

LOC — Loss of Charge Pressure Switch

MV — Motorized Valve

NEC — National Electrical Code

LEGEND

NOTES:

1. Compressor and blower motor thermally protected internally.

2. All wiring to the unit must comply with NEC and local codes.

3. Transformer for 208/230 v will be connected for 208 v operation. For 230 v operation, discon-

nect RED lead at L1 and attach ORN lead to L1. Insulate open end of RED lead. Transformer

for 220/240 v will be connected for 220 v operation. For 240 v operation, disconnect RED

lead at L1 and attach ORN lead to L1. Transformer is energy limiting or may have circuit

breaker.

4. FP1 thermistor provides freeze protection for water. When using antifreeze solutions, cut

JW3 jumper.

5. Typical Aquazone™ thermostat wiring shown. Refer to thermostat installation instructions for

wiring to the unit. Thermostat wiring must be Class 1 and voltage rating equal to or greater

than unit supply voltage.

6. 24-v alarm signal shown. For dry alarm contact, cut AL2 dr y jumper and dry contact will be

available between AL1 and AL2.

7. Transformer secondary ground via Deluxe D board standoffs and screws to control box.

(Ground available from top two standoffs as shown.)

8. Aquastat is field-supplied and must be wired in series with the hot leg to the pump. Aquastat

is rated for voltage up to 277 v.

9. Place jumpers on 2 and 3, ECM board, when dehumidification mode is used.

Fig. 16 — Wiring of 50PTH,PTV,PTD026-072 Units with Deluxe D Controller, Single Phase (208/230 V)

P1 — Field Wiring Terminal Block

RVS — Reversing Valve Solenoid

TRANS — Transformer

Field Line Voltage Wiring

Field Low Voltage Wiring

Printed Circuit Trace

Relay/Contactor Coil

Condensate Pan

Solenoid Coil

Thermistor

Ground

Wire Nut

BM (ECM)

AL — Alarm Relay Contacts

ASTAT — Aquastat

BM — Blower Motor

BR — Blower Relay

CB — Circuit Breaker

CC — Compressor Contactor

CO — Sensor, Condensate Overflow

DTS — Discharge Temp Switch

ECM — Electronically Commutated Motor

FP1 — Sensor, Water Coil Freeze Protection

FP2 — Sensor, Air Coil Freeze Protection

HP — High-Pressure Switch

HWG — Hot Water Generator

JW1 — Jumper, Alarm

LOC — Loss of Charge Pressure Switch

MV — Motorized Valve

NEC — National Electrical Code

P1 — Field Wiring Terminal Block

RVS — Reversing Valve Solenoid

TRANS — Transformer

NOTES:

1. Compressor and blower motor thermally protected internally.

2. All wiring to the unit must comply with NEC and local codes.

3. Transformer for 208/230 v will be connected for 208 v operation. For 230 v operation, disconnect

RED lead at L1 and attach ORN lead to L1. Insulate open end of RED lead. Transformer for 220/

240 v will be connected for 220 v operation. For 240 v operation, disconnect RED lead at L1 and

attach ORN lead to L1. Transformer is energy limiting or may have circuit breaker.

4. FP1 thermistor provides freeze protection for water. When using antifreeze solutions, cut JW3

jumper.

5. Typical Aquazone™ thermostat wiring shown. Refer to thermostat installation instructions for wir-

ing to the unit. Thermostat wiring must be Class 1 and voltage rating equal to or greater than unit

supply voltage.

6. 24-v alarm signal shown. For dry alarm contact, cut JW1 jumper and dr y contact will be available

between AL1 and AL2.

7. Transformer secondary ground via Complete C board standoffs and screws to control box.

(Ground available from top two standoffs as shown.)

8. Aquastat is field-supplied and must be wired in series with the hot leg to the pump. Aquastat is

rated for voltage up to 277 v.

9. Place jumpers on 2 and 3, ECM board, when dehumidification mode is used.

LEGEND

Field Line Voltage Wiring

Field Low Voltage Wiring

Printed Circuit Trace

Optional Wiring

Relay/Contactor Coil

Condensate Pan

Solenoid Coil

Temperature Switch

Thermistor

Ground

Wire Nut

Fig. 17 — Wiring of 50PTH,PTV,PTD026-072 Units with Complete C Controller, Three Phase (208/230 V)

ON 1 S

M F C

L1 A

HUM E

A 1

L A

H D

G 1

Y 2

1 B T

GGGGR

ECM INTERFACE BOARD LAYOUT

(ECM)

N O

F OF

SW1

ECM

INTERFACE

BOARD

ECM INTERFACE BOARD LAYOUT

GGGGR

OFF

DEH

BM (ECM)

ECM

INTERFACE

BOARD

SW1

OFF

(ECM)

AL — Alarm Relay Contacts

ASTAT — Aquastat

BM — Blower Motor

CB — Circuit Breaker

CC — Compressor Contactor

CO — Sensor, Condensate Overflow

COMPR — Compressor

DDC — Direct Digital Control

DTS — Discharge Temp Switch

ECM — Electronically Commutated Motor

FP1 — Sensor, Water Coil Freeze Protection

FP2 — Sensor, Air Coil Freeze Protection

HP — High-Pressure Switch

HWG — Hot Water Generator

JW1 — Jumper, Alarm

NSB — Digital Night Setback

LOC — Loss of Charge Pressure Switch

MV — Motorized Valve

NEC — National Electrical Code

LEGEND

NOTES:

1. Compressor and blower motor thermally protected internally.

2. All wiring to the unit must comply with NEC and local codes.

3. Transformer for 208/230 v will be connected for 208 v operation. For 230 v operation, dis-

connect RED lead at L1 and attach ORN lead to L1. Insulate open end of RED lead. Trans-

former for 220/240 v will be connected for 220 v operation. For 240 v operation, disconnect

RED lead at L1 and attach ORN lead to L1. Transformer is energy limiting or may have cir-

cuit breaker.

4. FP1 thermistor provides freeze protection for water. When using antifreeze solutions, cut

JW3 jumper.

5. Typical Aquazone™ thermostat wiring shown. Refer to thermostat installation instructions

for wiring to the unit. Thermostat wiring must be Class 1 and voltage rating equal to or

greater than unit supply voltage.

6. 24-v alarm signal shown. For dry alarm contact, cut AL2 dry jumper and dry contact will be

available between AL1 and AL2.

7. Transformer secondary ground via Deluxe D board standoffs and screws to control box.

(Ground available from top two standoffs as shown.)

8. Aquastat is field-supplied and must be wired in series with the hot leg to the pump.

Aquastat is rated for voltage up to 277 v.

9. Place jumpers on 2 and 3, ECM board, when dehumidification mode is used.

Fig. 18 — Wiring of 50PTH,PTV,PTD026-072 Units with Deluxe D Controller, Three Phase (208/230 V)

P1 — Field Wiring Terminal Block

RVS — Reversing Valve Solenoid

TRANS — Transformer

Field Line Voltage Wiring

Field Low Voltage Wiring

Printed Circuit Trace

Relay/Contactor Coil

Condensate Pan

Solenoid Coil

Thermistor

Ground

Wire Nut

ECM INTERFACE BOARD LAYOUT

GGGGR

HUM

BM (ECM)

ECM

INTERFACE

BOARD

(ECM)

SW1

AL — Alarm Relay Contacts

ASTAT — Aquastat

BM — Blower Motor

BR — Blower Relay

CB — Circuit Breaker

CC — Compressor Contactor

CO — Sensor, Condensate Overflow

COMPR — Compressor

DTS — Discharge Temp Switch

ECM — Electronically Commutated Motor

FP1 — Sensor, Water Coil Freeze Protection

FP2 — Sensor, Air Coil Freeze Protection

HP — High-Pressure Switch

HWG — Hot Water Generator

JW1 — Jumper, Alarm

LOC — Loss of Charge Pressure Switch

MV — Motorized Valve

NEC — National Electrical Code

P1 — Field Wiring Terminal Block

RVS — Reversing Valve Solenoid

TRANS — Transformer

NOTES:

1. Compressor and blower motor thermally protected internally.

2. All wiring to the unit must comply with NEC and local codes.

3. FP1 thermistor provides freeze protection for water. When using antifreeze solutions, cut JW3

jumper.

4. Typical Aquazone™ thermostat wiring shown. Refer to thermostat installation instructions for wir-

ing to the unit. Thermostat wiring must be Class 1 and voltage rating equal to or greater than unit

supply voltage.

5. 24-v alarm signal shown. For dry alarm contact, cut JW1 jumper and dry contact will be available

between AL1 and AL2.

6. Transformer secondary ground via Complete C board standoffs and screws to control box.

(Ground available from top two standoffs as shown.)

7. Aquastat is field-supplied and must be wired in series with the hot leg to the pump. Aquastat is

rated for voltage up to 277 v.

8. Place jumpers on 2 and 3, ECM board, when dehumidification mode is used.

LEGEND

Field Line Voltage Wiring

Field Low Voltage Wiring

Printed Circuit Trace

Optional Wiring

Relay/Contactor Coil

Condensate Pan

Solenoid Coil

Temperature Switch

Thermistor

Ground

Wire Nut

Fig. 19 — Wiring of 50PTH,PTV,PTD026-072 Units with Complete C Controller, Three Phase (460 V)

ECM INTERFACE BOARD LAYOUT

GGGGR

OFF

DEH

(ECM)

ECM

INTERFACE

BOARD

(ECM)

SW1

OFF

AL — Alarm Relay Contacts

ASTAT — Aquastat

BM — Blower Motor

BR — Blower Relay

CB — Circuit Breaker

CC — Compressor Contactor

CO — Sensor, Condensate Overflow

DDC — Direct Digital Control

DTS — Discharge Temp Switch

ECM — Electronically Commutated Motor

FP1 — Sensor, Water Coil Freeze Protection

FP2 — Sensor, Air Coil Freeze Protection

HP — High-Pressure Switch

HWG — Hot Water Generator

JW1 — Jumper, Alarm

NSB — Digital Night Setback

LOC — Loss of Charge Pressure Switch

MV — Motorized Valve

NEC — National Electrical Code

LEGEND

P1 — Field Wiring Terminal Block

RVS — Reversing Valve Solenoid

TRANS — Transformer

Field Line Voltage Wiring

Field Low Voltage Wiring

Printed Circuit Trace

Relay/Contactor Coil

Condensate Pan

Solenoid Coil

Thermistor

Ground

Wire Nut

NOTES:

1. Compressor and blower motor thermally protected internally.

2. All wiring to the unit must comply with NEC and local codes.

3. FP1 thermistor provides freeze protection for water. When using antifreeze solutions, cut JW3

jumper.

4. Typical Aquazone™ thermostat wiring shown. Refer to thermostat installation instructions for wiring

to the unit. Thermostat wiring must be Class 1 and voltage rating equal to or greater than unit supply

voltage.

5. 24-v alarm signal shown. For dry alarm contact, cut AL2 dry jumper and dry contact will be available

between AL1 and AL2.

6. Transformer secondary ground via Deluxe D board standoffs and screws to control box. (Ground

available from top two standoffs as shown.)

7. Fan motors are factory wired for medium speed. For high or low speed, remove BLU wire from fan

motor speed tap “M” or “3” and connect to “H” or “2” for high speed or “L” or “4” for low speed.

8. Place jumpers on 2 and 3, ECM board, when dehumidification mode is used.

Fig. 20 — Wiring of 50PTH,PTV,PTD026-072 Units with Deluxe D Controller, Three Phase (460 V)

*Optional Wiring.

AL — Alarm Relay Contacts

ASTAT — Aquastat

BM — Blower Motor

BMC — Blower Motor Capacitor

BR — Blower Relay

CB — Circuit Breaker

CC — Compressor Contactor

CO — Sensor, Condensate Overflow

DTS — Discharge Temperature Switch

ECM — Electronically Commutated Motor

FP1 — Sensor, Water Coil Freeze Protection

FP2 — Sensor, Air Coil Freeze Protection

HP — High-Pressure Switch

HPWS — High-Pressure Water Switch

HWG — Hot Water Generator

JW1 — Clippable Field Selection Jumper

LOC — Loss of Charge Pressure Switch

LON — Local Operating Network

MV — Motorized Valve

MVES — Motorized Valve End Switch

NEC — National Electrical Code

P1 — Field Wiring Terminal Block

RVS — Reversing Valve Solenoid

TRANS — Transformer

NOTES:

1. Compressor and blower motor thermally protected internally.

2. All wiring to the unit must comply with NEC and local codes.

3. Transformer is wired to 460 v (BLK/RED) lead for 460/3/60 units. Transformer is energy limiting or may

have circuit breaker.

4. FP1 thermistor provides freeze protection for water. When using antifreeze solutions, cut JW3 jumper.

5. Typical thermostat wiring shown. Refer to thermostat installation instructions for wiring to the unit. Ther-

mostat wiring must be Class 1 and voltage rating equal to or greater than unit supply voltage.

6. Factory cut JW1 jumper. Dry contact will be available between AL1 and AL2.

7. Transformer secondary ground via Complete C board standoffs and screws to control box. (Ground

available from top two standoffs as shown.)

8. Aquastat is supplied with unit and must be wired in series with the hot leg to the pump. Aquastat is rated

for voltages up to 277-v.

9. Optional LON wires. Only connect if LON connection is desired at the wall sensor.

10. Fan motors are factory wired for medium speed. For high or low speed, remove BLU wire from fan motor

speed tap “M” and connect to “H” for high speed or “L” for low speed.

11. For low speed, remove BLK wire from BR “6” and replace with RED. Connect BLK and BRN wires

together.

12. For blower motors with leads. For medium or low speed, disconnect BLK wire from BR “6”. Connect BLK

and ORG/PUR wire together. Connect RED for low or BLU for medium to BR “6”.

13. 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.

Complete C

a50-8363

LEGEND

Field Line Voltage Wiring

Field Low Voltage Wiring

Printed Circuit Trace

Optional Wiring

Relay/Contactor Coil

Condensate Pan

Solenoid Coil

Temperature Switch

Thermistor

Ground

Wire Nut

Relay Contacts - N.C.

Relay Contacts - N.O.

Low Pressure Switch

High Pressure Switch

Splice Cap

Circuit Breaker

Fig. 21 — Wiring of 50PTH,PTV,PTD026-072 Units with Complete C and LON Controller, Three Phase (460 V)

*Optional Wiring.

AL — Alarm Relay Contacts

ASTAT — Aquastat

BM — Blower Motor

BMC — Blower Motor Capacitor

BR — Blower Relay

CB — Circuit Breaker

CC — Compressor Contactor

CO — Sensor, Condensate Overflow

DTS — Discharge Temperature Switch

ECM — Electronically Commutated Motor

FP1 — Sensor, Water Coil Freeze Protection

FP2 — Sensor, Air Coil Freeze Protection

HP — High-Pressure Switch

HPWS — High-Pressure Water Switch

HWG — Hot Water Generator

JW1 — Clippable Field Selection Jumper

LOC — Loss of Charge Pressure Switch

LON — Local Operating Network

MV — Motorized Valve

NEC — National Electrical Code

P1 — Field Wiring Terminal Block

RVS — Reversing Valve Solenoid

TRANS — Transformer

LEGEND

Field Line Voltage Wiring

Field Low Voltage Wiring

Printed Circuit Trace

Optional Wiring

Relay/Contactor Coil

Condensate Pan

Solenoid Coil

Temperature Switch

Thermistor

Ground

Wire Nut

Relay Contacts - N.C.

Relay Contacts - N.O.

Low Pressure Switch

High Pressure Switch

Splice Cap

Circuit Breaker

NOTES:

1. Compressor and blower motor thermally protected internally.

2. All wiring to the unit must comply with NEC and local codes.

3. Transformer is wired to 460 v (BLK/RED) lead for 460/3/60 units. Transformer is energy limiting or may

have circuit breaker.

4. FP1 thermistor provides freeze protection for water. When using antifreeze solutions, cut JW3 jumper.

5. Typical thermostat wiring shown. Refer to thermostat installation instructions for wiring to the unit. Ther-

mostat wiring must be Class 1 and voltage rating equal to or greater than unit supply voltage.

6. Factory cut JW1 jumper. Dry contact will be available between AL1 and AL2.

7. Transformer secondary ground via Deluxe D board standoffs and screws to control box. (Ground avail-

able from top two standoffs as shown.)

8. Aquastat is supplied with unit and must be wired in series with the hot leg to the pump. Aquastat is rated

for voltages up to 277-v.

9. Place jumpers on 2 and 3, ICM board, when dehumidification mode is used.

10. Optional LON wires. Only connect if LON connection is desired at the wall sensor.

11. Blower motor is factory wired for medium and high speeds. For any other combination of speeds, at the

motor attach the BLK wire to the higher of the two desired speed taps and the BLU wire to the lower of

the two desired speed taps.

12. Blower motor is factory wired for high and low speeds. No other combination is available.

13. 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.

Fig. 22 — Wiring of 50PTH,PTV,PTD026-072 Units with Deluxe D and LON Controller, Three Phase (460 V)

Deluxe D

LOC

FP1

FP2

RVS

SEE NOTE 4

a50-8364

LEGEND

AL — Alarm Relay Contacts

ASTAT — Aquastat

BM — Blower Motor

BMC — Blower Motor Capacitor

BR — Blower Relay

CB — Circuit Breaker

CC — Compressor Contactor

DTS — Discharge Temperature Switch

ECM — Electronically Commutated Motor

FP1 — Sensor, Water Coil Freeze Protection

FP2 — Sensor, Air Coil Freeze Protection

HP — High-Pressure Switch

HPWS — High-Pressure Water Switch

HWG — Hot Water Generator

JW — Jumper Wire

LOC — Loss of Charge Pressure Switch

LWT — Leaving Water Temperature

MV — Motorized Valve

MVES — Motorized Valve End Switch

NEC — National Electrical Code

P1 — Field Wiring Terminal Block

RH — Relative Humidity

RVS — Reversing Valve Solenoid

SPT — Space Temperature Sensor

TRANS — Transformer

Deluxe D

Field Line Voltage Wiring

Relay Contacts - N.C.

Field Low Voltage Wiring

Relay Contacts - N.O.

Printed Circuit Trace

Low Pressure Switch

Optional Wiring

High Pressure Switch

Relay/Contactor Coil Circuit Breaker

Condensate Float Switch Splice Cap

Solenoid Coil

Temperature Switch

Thermistor

Ground

Wire Nut

* Optional wiring.

NOTES:

1. Compressor and blower motor thermally protected internally.

2. All wiring to the unit must comply with NEC and local codes.

3. 208-240 60 Hz units are wired for 208v operation. For 240v 60 Hz

operation switch RED wire to ORG wire. 2240240v 50 Hz units are

wired for 240v operation. For 220v 50 Hz operation switch ORG

wire to RED. Transformer is energy limiting or may have circuit

breaker.

4. FP1 thermistor provides low temperature protection for water.

When using antifreeze solutions, cut JW3 jumper.

5. Refer to thermostat installation, application and operation manual

for control wiring to the unit. Wire from ECM to “Y” CXM when a

motorized valve is not used. Thermostat wiring must be “Class 1”

and volatage rating equal to or greater than unit supply voltage.

6. 24v alarm signal shown. For dry alarm contact, cut JW1 jumper.

Dry contact will be available between AL1 and AL2.

7. Transformer secondary ground via green wire with yellow stripe

from “C” terminal to control box

8. Aquastat is supplied with unit and must be wired in series with the

hot leg to the pump. Aquastat is rated for voltages up to 277v.

9. For field-installed two-position hot water reheat coils disconnect

wire from terminal W1 and connect to field-supplied hot water

valve.

Fig. 23 — Wiring of 50PTH,PTV,PTD026-072 with Deluxe D and WSHP Open Multiple Protocol Controls (Single-Phase 208-230 V)

a50-8570

012207-1BT485BT

LED1

Install BT485 where device is

located at the end of network

segment only.

+ 24vac

(If not installed, it must be connected to DO-5)

DEHUMIDIFY OUTPUT CONTACT (DO-6) (FACTORY OPTION)

FAN SPEED (DO-7) (MED OR LOW)

OA DAMPER (AO-2)

FAN SPEED (DO-8) (HIGH OR FAN ON )

LWT (Input 6)

SAT (LAT) (Input 7)

SPACE CO2

SENSOR

+24vac

4-20mA

AO1 – Aux Reheat or Cond.

WTR. Loop Econ. (AO 1)

-Gnd

Fan (DO-1) (Fan On or Low Speed)

Aux Heat (DO-2)

Reversing Valve (DO-3)

Comp #2 (DO-4)

Comp #1 (DO-5)

Comp Status (DI-5)

SPT PLUS Sensor

Shown

+12V

Rnet-

Rnet+

Gnd

RED

BLACK

WHITE

GREEN

To WSHP Controller

Rnet Terminals (J13)

FIELD INSTALLED

3 45

7 8

2 3

123 4

2 3

123 45678

GREEN

WHITE

BLACK

RED

Field Installed

J12

J13

J20

J19

J22

J17

J11

J14

SPT PLUS

J1 J2

SW3

MSB

LSB

MSTP Baud

9600 19.2k 38.4k 76.8k

SPACE RH

SENSOR

+24vac

4-20mA

Local Access Port

(FIELD-INSTALLED)

PRIMARY

CONDENSATE

OVERFLOW SWITCH

REMOTE OCCUPANCY/

FAN STATUS SWITCH

(FIELD-INSTALLED)

NC FIRE/SMOKE

DETECTOR CONTACT

(FIELD-INSTALLED)

Fig. 24 — WSHP Open Control

WSHP Open Inputs and Outputs Table

*These inputs are configurable.

INPUT/OUTPUT TYPE PART NUMBERS TYPE OF I/O

CONNECTION

PIN NUMBERS

CHANNEL

DESIGNATION

Inputs

Space Temperature Sensor SPS, SPPL, SPP Communicating J13, 1 - 4 Local Access Port

Space Relative Humidity 33ZCSENSRH-01 AI (4 - 20mA) J4, 5 and 6 Analog Input 1

Indoor Air Quality 33ZCSENCO2 AI (4 -20mA) J4, 2 and 3 Analog Input 2

Condensate Switch N/A BI (Dry Contacts) J1, 2 Binary Input 3

Stage 1 Compressor Status N/A BI (Dry Contacts) J1, 10 Binary Input 5

Leaving Condenser Water Temperature 10K Type II AI (10K Thermistor) J2, 1 and 2 Analog Input 6

Supply Air Temperature 33ZCSENSAT AI (10K Thermistor) J2, 3 and 4 Analog Input 7

Outputs

Modulating Valve (Auxiliary Heat/Water

Economizer)

N/A AO (0-10Vdc/2 - 10Vdc) J2 4 and 5* Analog Output 1

Outside Air Damper N/A AO (0-10Vdc/2 - 10Vdc) J22 1 and 2* Analog Output 2

Supply Fan On/Low Speed

(3 Speed Only)

N/A BO Relay (24VAC, 1A) J1, 4* Binary Output 1 (G)

Auxiliary Heat or 2-Position Water Loop

Economizer

N/A BO Relay (24VAC, 1A) J1, 5* Binary Output 2

Reversing Valve (B or O Operation) N/A BO Relay (24VAC, 1A) J1, 6* Binary Output 3 (RV)

Compressor 2nd Stage N/A BO Relay (24VAC, 1A) J1, 7 Binary Output 4 (Y2)

Compressor 1st Stage N/A BO Relay (24VAC, 1A) J1, 8 Binary Output 5 (Y1)

Dehumidification Relay N/A BO Relay (24VAC, 1A) J11, 7 and 8 (NO) Binar y Output 6

Fan Speed Medium/Low (3 Speed Only) N/A BO Relay (24VAC, 1A) J11, 5 and 6 (NO)* Binary Output 7

Fan Speed High/Low (3 Speed Only) N/A BO Relay (24VAC, 1A) J11, 2 and 3 (NO)* Binary Output 8

LEGEND

NOTES:

10. Mount the water source heat pump controller in the equipment controls enclosure

with at least two #6 x 1 in. self-tapping screws. Allow adequate clearance for wiring.

11. Verify sensor power and wiring requirements prior to making any terminations. Sen-

sors requiring a separate isolated 24 vac power source will not utilize WSHP termi-

nals J4-1, or 4.

AI — Analog Input

AO — Analog Output

BI — Binary Input

BO — Binary Output

SPT — Space Temperature

Factory Wiring

Field Wiring

a50-8571

COMPRESSOR CONTACTOR

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

LINE

LOAD

CAPACITOR

COMPLETE C CONTROL

TRANSFORMER

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.

WARNING

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.

Wiring Sensors to Inputs 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 troller is configurable with the following field-supplied sensors. See Table 5.

Table 5 — Field-Supplied Sensors for

WSHP Open Controller

SENSOR NOTES

Space Temperature Sensor

Indoor Air Quality Sensor

NOTE: BACview6 Handheld or Virtual BACview can be used as the user interface.

(SPT)

Outdoor Air

Temperature Sensor

(Separate Sensor)

Space Relative

Humidity Sensor

For specific details about sensors, refer to the literature sup-

plied with the sensor. Wiring a SPT Sensor

ed 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.

— Sensors can be wired to the

— The WSHP Open con-

Field Installed (Must be used with

WSHP Open controller.)

Network Sensor

Required only for demand

control ventilation.

Separate Sensor

— A WSHP Open controller is connect-

ECM CONTROL

BOARD

Table 6 — SPT Sensors

SENSOR

SPT

Standard

SPT Plus SPPL

SPT Pro SPP

SPT Pro

Plus

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

PA RT

NUMBER

SPS

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

• Local access port

• LCD display

• Manual on button to override schedule

• Warmer and cooler buttons to adjust set point

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

• Local access port

• LCD display

• Manual on button to override schedule

• Warmer and cooler buttons to adjust set point

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

• Local access port

• Fan speed*

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

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

Conductor 18 AWG

Maximum Length 500 ft

Recommended Coloring

UL Temperature 32 to 167 F

Vo lta ge 300-vac, power limited

Listing UL: NEC CL2P, or better

AWG — American Wire Gage CMP — Communications Plenum Cable NEC — National Electrical Code UL — Underwriters Laboratories

LEGEND

4 conductor, unshielded, CMP,

plenum rated cable

Jacket: white

Wiring: black, white, green, red

To wire the SPT sensor to the controller:

Fig. 26 — Rnet Cable Wire

a50-8443

–

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

/4 in. of the inner insulation from each wire.

See Fig. 26.

OUTER JACKET

.25 IN.

INNER INSULATION

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 TERMINAL

Red +12-v Black .Rnet White Rnet+ Green 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 CO2 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,

/4 watt, 2% tolerance resistor connected across the zone con-

troller’s IAQ input terminals. NOTE: Do not use a relative humidity sensor and CO

on the same zone controller if both sensors are powered off the

sensor

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,

/4 watt, 2% tolerance resistor across the controller’s RH/IAQ and Gnd terminals.

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 on the same zone controller if both sensors are powered off the

sensor

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

/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.

TYPICAL WATER VALVE

24 VAC

TERMINAL STRIP P2

Fig. 27 — Low Voltage Field Wiring

AQUAZONE CONTROL (Complete C Shown)

Fig. 28 — Typical Aquazone™ Control Board

Jumper Locations

Fig. 29 — Typical Accessory Wiring

a50-8141

a50-7764tf

Fig. 30 — AMV Valve Wiring

THERMOSTAT

AMV

TACO VALVE

HEATER SWITCH

a50-8441

Fig. 31 — Taco SBV Valve Wiring

a50-8442

COMPRESSOR CONTACTOR

LINE

TRANSFORMER

CAPACITOR

LOAD

COMPLETE C CONTROL

GGGGR

TB1

CFM

SW1 SW2 SW3 SW4 SW5 SW6 SW7 SW8 SW9

OFF

DEHUM

THERMOSTAT CONNECTION

AL1

–

GGGGR

R DH

AL1

SW1

SW2

SW3

SW4

SW5

SW6

SW7

SW8

SW9

OFF

DEHUM

CFM

TB1

THERMOSTAT INPUT LEDS

CFM COUNTER 1 FLASH PER 100 CFM

ECM MOTOR LOW VOLTAGE CONNECTOR

1/4" SPADE

CONNECTIONS

TO COMPLETE C OR

DELUXE D BOARD

THERMOSTAT

CONNECTIONS

DEHUMIDIFICATION

LED

FAN SPEED SELECTION DIP SWITCH

Fig. 32 — ECM Interface Board Physical Layout

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 mal) 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.

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

CFM Adjust tions. 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 Tab le 11.

— The cooling setting determines the cooling (nor-

Table 9 — Cooling Settings

TAP SETTING

1 ON ON 2 ON OFF 3 OFF ON 4 OFF OFF

DIP SWITCH

SW1 SW2

— The heating setting determines the heating cfm

Table 10 — Heating Settings

TAP SETTING

1 ON ON 2 ON OFF 3 OFF ON 4 OFF OFF

DIP SWITCH

SW3 SW4

— The CFM Adjust setting allows four selec-

Table 11 — CFM Adjust Settings

TAP SETTING

TEST ON ON

NORM OFF OFF

DIP SWITCH

SW7 SW8

ON OFF

OFF ON

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 ON

Dehumid OFF

DIP SWITCH

SW9

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.

Table 13 — Blower Performance Data

50PT

UNIT SIZE

026 0.50

038 0.50

049 0.75 1

064 0.75 1

072 0.75 1

MAX ESP

(in. wg)

FAN

MOTOR

(hp)

TAP

SETTING

4 810 950 475 630 740 475 920 1060 475 3 725 850 425 560 660 425 825 950 425 2 620 730 370 490 570 370 710 820 370 1 520 610 300 — — — 600 690 300 4 1120 1400 700 870 1090 700 1120 1400 700 3 1000 1250 630 780 980 630 1000 1250 630 2 860 1080 540 670 840 540 860 1080 540 1 730 900 450 — — — 730 900 450 4 1460 1730 870 1140 1350 870 1560 1850 870 3 1300 1550 780 1020 1210 780 1400 1650 780 2 1120 1330 670 870 1040 670 1200 1430 670 1 940 1120 560 — — — 1010 1200 560 4 1670 2050 1020 1300 1600 1020 1860 2280 1020 3 1500 1825 920 1160 1430 920 1650 2050 920 2 1280 1580 790 1000 1230 790 1430 1750 790 1 1080 1320 660 — — — 1200 1470 660 4 1620 2190 1050 1270 1650 1050 1690 2230 1050 3 1500 1950 980 1170 1520 980 1600 2100 980 2 1400 1830 910 1100 1420 910 1400 1850 910 1 1320 1700 850 — — — 1240 1620 850

COOLING MODE (cfm) DEHUMIDIFICATION MODE (cfm) HEATING MODE (cfm)

Stage 1 Stage 2 Fan Stage 1 Stage 2 Fan Stage 1 Stage 2 Fan

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 SPEED

G Fan Only

G + Y1 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).

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

50PT UNIT

SIZE

26 0.5 0.5

38 0.5 0.5

49 0.75 1

64 0.75 1

72 0.75 1

NOTE: Factory default setting shown bold. IMPORTANT: The tap setting for high fan MUST equal or exceed the

MAX

ESP

FAN MOTOR

TAP SETTING

4 OFF OFF 475 920 1050 3 OFF ON 425 825 950

2 ON OFF 370 710 820

1 ON ON 300 600 690 4 OFF OFF 700 1120 1400 3 OFF ON 630 1000 1250

2 ON OFF 540 860 1080

1 ON ON 450 730 900 4 OFF OFF 870 1560 1850 3 OFF ON 780 1400 1650

2 ON OFF 670 1200 1430

1 ON ON 560 1010 1200 4 OFF OFF 1020 1860 2280 3 OFF ON 920 1650 2040

2 ON OFF 780 1430 1750

1 ON ON 660 1200 1470 4 OFF OFF 1050 1600 2230 3 OFF ON 980 1600 2100

2 ON OFF 910 1400 1850

1 ON ON 850 1240 1620

SW 3

(SW 1)

SW 4

(SW 2)

FAN ONLY

tap setting for fan only/low/med fan

COOLING AND

HEATING LOW FAN

COOLING AND

HEATING MED FAN

Table 14B — WSHP Open — High Fan Airflow

50PT UNIT SIZE MAX ESP FAN MOTOR HP TAP SETTING SW 5 SW 6 COOLING AND HEATING HIGH FAN

4 OFF OFF 1060

26 0.5 0.5

38 0.5 0.5

49 0.75 1

64 0.75 1

72 0.75 1

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

3 OFF ON 950 2 ON OFF 820 1 ON ON 690

4 OFF OFF 1400

3 OFF ON 1350 2 ON OFF 1350 1 ON ON 1350

4 OFF OFF 1850

3 OFF ON 1660 2 ON OFF 1430 1 ON ON 1350

4 OFF OFF 2280

3 OFF ON 2050 2 ON OFF 1750 1 ON ON 1470

4 OFF OFF 2230

3 OFF ON 2100 2 ON OFF 1870 1 ON ON 1670

5. Air is purged from closed loop system.

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

7. Isolation valves are open.

PRE-START-UP

System Checkout —

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.

When the installation is complete,

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.

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 SETTING — 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

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 Com-

plete 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.

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) 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 able 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 lection 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 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 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 erless 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.

— The PM is a unique feature

— Switch 2 will en-

— Switch 3 provides se-

— Switch 4 provides selection for heat

— Switch 5 provides selection

— Switch 7 provides selection of boil-

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 On On On

Digital NSB Off On On

Water Valve — Slow Opening On Off On

Reheat — Dehumidistat Off On Off

NSB — Night Setback OAD — Outside Air Damper

NOTE: All other DIP switch combinations are invalid.

OAD On On Off

Reheat — Humidistat Off Off Off

LEGEND

DIP SWITCH POSITION

123

Table 15B — DIP Switch Block S2 —

Accessory 2 Relay Options

ACCESSORY 2

RELAY OPTIONS

Cycle with Compressor On On On

Digital NSB Off On On

Water Valve — Slow Opening On Off On

NSB — Night Setback OAD — Outside Air Damper

NOTE: All other switch combinations are invalid.

OAD On On Off

LEGEND

DIP SWITCH POSITION

456

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

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

Humidistat

Dehumidistat Off On Off Standard 24 VAC 0 VAC

2.2 2.3 Logic

Of f O ff O ff Re ve rs e 0 VA C 24 VAC

Reheat

(ON) - H

Reheat

(OFF) - H

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 applica-

ble 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 On/Off Off Off Off Off On/Off Off Off Off Off Fan Only On/Off On Off Off Off On/Off On Off Off Off Cooling Stage 1 On On On Off Off On On On Off Off Cooling Stage 2 On On On On Off On On On On Off Cooling and Dehumidistat Dehumidistat Only On/Off Off Off Off On On On On On On Heating Stage 1 Off On On Off Off Off On On Off Off Heating Stage 2 Off OnOnOnOffOffOnOnOnOff Heating and Dehumidistat** Off On On On/Off On Off On On On/Off Off

*Not applicable for single stage units; Full load operation for dual capacity units. †Cooling input takes priority over dehumidify input.

†

O G Y1 Y2* H O G Y1 Y2* Reheat

On On On On/Off On On On On On/Off Off

INPUT OUTPUT

**Deluxe D is programmed to ignore the H demand when the unit is in heating mode. NOTE: On/Off is either on or off.

START-UP

Fig. 33 — HWR Schematic

a50-8145

Water Out (To Water Loop)

Water In (From Water Loop)

Mixing Valve

COAX

Evaporator Coil

Reheat

Coil

Refrigerant Out

(Cooling)

Refrigerant In

(Cooling)

Entering Air

Leaving

Air

Internal Pump

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

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.

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

Min. Ambient Air 45 40 Rated Ambient Air 80 70 Max. Ambient Air 100 85 Min. Entering Air 50 40 Rated Entering Air db/wb 80/67 70 Max. Entering Air db/wb 110/83 80

Min. Entering Water 30 20 Normal Entering Water 50-110 30-70 Max. Entering Water 120 90

db — Dry Bulb wb — Wet Bulb

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

AIR LIMITS COOLING (F) HEATING (F)

WATER LIMITS

LEGEND

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

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

Through Heat Exchanger

COOLING

RISE (F)

Min Max Min Max

91248

20 26 10 17

HEATING DROP (F)

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

ENTERING

WATER

TEMP (F)

(EWT)

110

DB — Dry Bulb HWG — Hot Water Generator ——No heating operation in this temperature range

WATER

FLOW

(Gpm/Ton)

1.5 118-128 159-179 25-30 9-14 16.7-18.7 19-25 73- 83 273-293 6-11 3- 8 5.9- 7.9 16-22

2.25 118-128 146-166 25-30 7-12 12.3-14.3 20-26 75- 85 275-295 6-11 3- 8 4.2- 6.2 17-23 3 118-128 132-152 25-30 7-12 7.9- 9.9 20-26 78- 88 277-297 6-11 3- 8 2.7- 4.7 18-24

1.5 128-138 186-206 18-23 8-13 16.3-18.3 19-25 102-112 302-322 8-12 6-11 8.9-10.9 22-28

2.25 128-138 172-192 18-23 6-11 12.1-14.1 20-26 106-116 303-323 8-12 6-11 6.7- 8.7 23-29 3 128-138 158-178 18-23 6-11 7.8- 9.8 20-26 110-120 305-325 8-12 6-11 4.5- 6.5 23-29

1.5 136-146 281-301 7-12 7-12 15.7-17.7 19-25 128-138 330-350 10-15 8-13 11.3-13.3 27-34

2.25 136-146 267-287 7-12 5-10 11.6-13.6 19-25 134-144 332-352 10-15 8-13 8.5-10.5 28-35 3 136-146 253-273 7-12 4- 9 7.6- 9.6 19-25 141-151 334-354 10-15 8-13 5.8- 7.8 28-35

1.5 139-149 368-388 6-11 7-12 14.9-16.9 18-24 162-172 367-387 14-19 10-15 14.4-16.4 33-41

2.25 139-149 354-374 6-11 5-10 11.0-13.0 18-24 166-176 372-392 15-20 10-15 10.8-12.8 34-42 3 139-149 340-360 6-11 5-10 7.2- 9.2 18-24 171-181 377-397 17-22 10-15 7.1- 9.1 34-42

1.5 143-153 465-485 6-11 7-12 13.9-15.9 17-23 — — — — — —

2.25 143-153 450-470 6-11 5-10 10.2-12.2 17-23 — — — — — — 3 143-153 433-453 6-11 5-10 6.5- 8.5 17-23 — — — — — —

FULL LOAD COOLING WITHOUT HWG ACTIVE FULL LOAD HEATING WITHOUT HWG ACTIVE

Suction

Pressure

LEGEND

(psig)

Discharge

Pressure

(psig)

Super-

heat

(F)

Sub-

cooling

(F)

Water

Tem p

Rise

(F)

Air

Tem p

Drop (F)

Suction

Pressure

(psig)

Discharge

Pressure

(psig)

Super-

heat

(F)

Sub-

cooling

(F)

Wate r Tem p

Drop

(F)

Air

Tem p

Rise (F)

Table 21 — Typical 50PTH,PTV,PTD038 Unit Operating Pressures and Temperatures

ENTERING

WATER

TEMP (F)

(EWT)

110

DB — Dry Bulb HWG — Hot Water Generator ——No heating operation in this temperature range

WATER

FLOW

(Gpm/Ton)

1.5 120-130 156-176 25-30 9-14 22.1-24.1 18-24 69- 79 293-313 7-12 14-19 8.9-10.9 17-23

2.25 119-129 148-168 25-30 8-13 16.8-18.8 19-25 73- 83 297-317 7-12 14-19 6.7- 8.7 18-24 3 119-129 138-158 25-30 8-13 10.5-12.5 19-25 76- 86 300-320 7-12 14-19 4.5- 6.5 19-25

1.5 129-139 225-245 15-20 10-15 21.9-23.9 18-24 96-106 322-342 10-15 17-22 12.2-14.2 23-29

2.25 128-138 211-231 15-20 9-14 16.1-18.1 19-25 100-110 326-346 10-15 17-22 9.3-11.3 24-30 3 128-138 197-217 15-20 9-14 10.3-12.3 19-25 105-115 331-351 10-15 17-22 6.4- 8.4 24-30

1.5 136-146 302-322 9-14 13-18 21.5-23.5 18-24 123-133 352-372 11-16 19-24 15-17 28-35

2.25 135-145 283-303 9-14 12-17 15.8-17.8 19-25 129-139 358-378 11-16 19-24 11.6-13.6 29-36 3 135-145 265-285 9-14 12-17 10.0-12.0 19-25 135-145 364-384 11-16 19-24 8.2-10.2 30-37

1.5 140-150 390-410 7-12 13-18 20.5-22.5 17-23 157-167 390-410 13-18 18-23 21-23 36-44

2.25 140-150 369-389 8-13 8-13 14.9-16.9 17-23 169-179 399-419 13-18 16.5-21.5 15.5-17.5 37-45 3 140-150 349-369 8-13 8-13 9.3-11.3 17-23 181-191 408-428 14-19 15-20 10.5-12.5 39-47

1.5 145-155 488-508 7-12 13-18 19.0-21.0 17-23 — — — — — —

2.25 145-155 467-487 8-13 8-13 14.0-16.0 17-23 — — — — — — 3 145-155 447-467 8-13 8-13 9.0-11.0 17-23 — — — — — —

FULL LOAD COOLING WITHOUT HWG ACTIVE FULL LOAD HEATING WITHOUT HWG ACTIVE

Suction

Pressure

(psig)

Discharge

Pressure

(psig)

Super-

heat

(F)

LEGEND

Table 22 — Typical 50PTH,PTV,PTD049 Unit Operating Pressures and Temperatures

ENTERING

WATER

TEMP (F)

(EWT)

110

DB — Dry Bulb HWG — Hot Water Generator ——No heating operation in this temperature range

WATER

FLOW

(Gpm/Ton)

1.5 112-122 187-207 22-27 14-19 20.7-22.7 18-24 66- 76 286-306 7-12 8-13 8-10 18-24

2.25 111-121 167-187 22-27 12-17 15.5-17.5 18-24 69- 79 289-309 7-12 9-14 6- 8 19-25 3 111-121 147-167 23-28 11-16 10.2-12.2 18-24 72- 82 292-312 7-12 9-14 4- 6 19-25

1.5 125-135 242-262 13-18 10-15 20.9-22.9 19-25 93-103 314-334 8-13 10-15 11.5-13.5 23-29

2.25 123-133 224-244 13-18 9-14 15.6-17.6 19-25 98-108 320-340 8-13 10-15 8.7-10.7 24-30 3 122-132 205-225 14-19 7-12 10.2-12.2 19-25 103-113 326-346 8-13 10-15 5.9- 7.9 25-31

1.5 133-143 310-330 8-13 8-13 20.5-22.5 19-25 123-133 344-364 9-14 9-14 15-17 28-35

2.25 132-142 290-310 8-13 7-12 15.2-17.2 19-25 130-140 354-374 9-14 9-14 11.5-13.5 29-36 3 131-141 270-290 9-14 5-10 9.9-11.9 19-25 137-147 361-381 9-14 9-14 7.9- 9.9 30-37

1.5 138-148 396-416 7-12 7-12 19.2-21.2 18-24 165-175 390-410 13-18 8-13 19.6-21.6 37-45

2.25 137-147 374-394 7-12 6-11 14.3-16.3 18-24 175-185 401-421 15-20 8-13 15-17 38-46 3 136-146 352-372 7-12 4- 9 9.3-11.3 18-24 185-195 413-433 17-22 8-13 10.3-12.3 39-47

1.5 144-154 497-517 7-12 5-10 18.0-20.0 17-23 — — — — — —

2.25 143-153 472-492 7-12 4- 9 13.3-15.3 17-23 — — — — — — 3 142-152 447-467 7-12 3- 8 8.5-10.5 17-23 — — — — — —

FULL LOAD COOLING WITHOUT HWG ACTIVE FULL LOAD HEATING WITHOUT HWG ACTIVE

Suction

Pressure

(psig)

Discharge

Pressure

(psig)

Super-

heat

(F)

LEGEND

Sub-

cooling

(F)

Sub-

cooling

(F)

Water

Tem p

Rise

(F)

Water

Tem p

Rise

(F)

Air

Tem p

Drop (F)

Air

Tem p

Drop (F)

Suction

Pressure

(psig)

Suction

Pressure

(psig)

Discharge

Pressure

(psig)

Discharge

Pressure

(psig)

Super-

heat

(F)

Super-

heat

(F)

Sub-

cooling

(F)

Sub-

cooling

(F)

Wate r

Tem p Drop

(F)

Wate r

Tem p Drop

(F)

Air

Tem p

Rise (F)

Air

Tem p

Rise (F)

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

ENTERING

WATER

TEMP (F)

(EWT)

110

DB — Dry Bulb HWG — Hot Water Generator ——No heating operation in this temperature range

WATER

FLOW

(Gpm/Ton)

1.5 117-127 170-190 27-32 15-20 18.2-20.2 17-23 66- 76 282-302 10-16 9-14 8-10 19-25

2.25 116-126 143-163 28-33 13-18 12.6-14.6 17-23 69- 79 285-305 10-16 9-14 6- 8 19-25 3 115-125 135-155 29-34 12-17 7.0- 9.0 17-23 72- 82 289-309 10-16 10-15 4- 6 20-26

1.5 128-138 238-258 16-21 14-19 20.5-22.5 21-27 90-100 310-330 11-17 12-17 11.3-13.3 24-30

2.25 126-136 222-242 21-26 13-18 14.9-16.9 21-27 95-105 313-333 11-17 12-17 8.5-10.5 25-31 3 125-135 205-225 26-31 12-17 9.2-11.2 21-27 99-109 316-336 11-17 12-17 5.7- 7.7 26-32

1.5 135-145 315-335 10-15 14-19 21.0-23.0 22-28 115-125 337-357 12-18 14-19 14-16 28-35

2.25 134-144 296-316 12-17 13-18 15.5-17.5 22-28 120-130 341-361 12-18 14-19 10.6-12.6 29-36 3 133-143 276-296 15-20 11-16 10.0-12.0 22-28 126-136 345-365 12-18 15-20 7.3- 9.3 30-37

1.5 139-149 408-428 10-15 15-20 20.1-22.1 21-27 157-167 390-410 15-20 14-19 18.2-20.2 37-45

2.25 138-148 386-406 10-15 13-18 14.8-16.8 21-27 161-171 394-414 15-20 14-19 13.9-15.9 38-46 3 138-148 364-384 10-15 11-16 9.5-11.5 21-27 166-176 398-418 15-20 15-20 9.6-11.6 39-47

1.5 144-154 515-535 8-13 14-19 19.0-21.0 20-26 — — — — — —

2.25 143-153 493-513 8-13 13-18 14.0-16.0 20-26 — — — — — — 3 142-152 469-489 8-13 12-17 9.0-11.0 20-26 — — — — — —

FULL LOAD COOLING WITHOUT HWG ACTIVE FULL LOAD HEATING WITHOUT HWG ACTIVE

Suction

Pressure

(psig)

Discharge

Pressure

(psig)

Super-

heat

(F)

LEGEND

Sub-

cooling

(F)

Water

Tem p

Rise

(F)

Air

Tem p

Drop (F)

Suction

Pressure

(psig)

Discharge

Pressure

(psig)

Super-

heat

(F)

Sub-

cooling

(F)

Wate r

Tem p Drop

(F)

Air

Tem p

Rise (F)

Unit Start-Up with WSHP Open Controls —

Fig. 34 — BACview6 Display Interface

a50-8444

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

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 required. See Fig. 34.

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

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

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.

display is

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.

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

the week.

g. Continue to add the same or different schedule spe-

cific days of the week. To add exceptions to the schedule: i. Press Add softkey. ii. Select exception type from following:

• Date

• Date Range

• Week-N-Day

• Calender Reference

9. Go back to Home Screen.

10. Remove BACview

cable from SPT sensor by reversing

the process in Step 1.

11. Perform system test.

Flow Regulation — Flow regulation can be accom-

plished 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

4.0 1.5 1.3 1.1 1.0

6.0 3.1 2.6 2.3 2.1

7.0 4.1 3.4 3.0 2.7

8.0 5.1 4.3 3.8 3.4

4.0 1.2 1.0 0.8 0.6

6.0 2.6 2.5 2.3 2.1

8.0 4.5 4.2 4.0 3.7

9.0 5.7 5.2 4.8 4.4

5.5 1.1 0.9 0.8 0.7

8.3 2.2 2.1 2.0 1.8

11.0 3.9 3.6 3.2 3.1

12.0 4.5 4.2 3.8 3.5

7.0 0.5 0.3 0.2 0.1

10.5 1.9 1.8 1.7 1.6

14.0 3.9 3.5 3.2 2.9

15.0 4.8 4.3 3.9 3.5

WATER TEMPERATURE (F)

30 F 50 F 70 F 90 F

Pressure Drop (psi)

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

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.

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

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.

Table 25 — Approximate Fluid Volume (gal.)

per 100 Ft of Pipe

PIPE DIAMETER (in.) VOLUME (gal.)

Copper 14.1

Rubber Hose 13.9 Polyethylene

LEGEND

IPS — Internal Pipe Size SCH — Schedule SDR — Standard Dimensional Ratio

NOTE: Volume of heat exchanger is approximately 1.0 gallon.

1.25 6.4

1.5 9.2

/4 IPS SDR11 2.8 1 IPS SDR11 4.5 11/4 IPS SDR11 8.0

/2 IPS SDR11 10.9 2 IPS SDR11 18.0 11/4 IPS SCH40 8.3 11/2 IPS SCH40 10.9 2 IPS SCH40 17.0

Table 26 — Antifreeze Percentages by Volume

MINIMUM TEMPERATURE FOR

ANTIFREEZE

Methanol (%) 25 21 16 10 100% USP Food Grade

Propylene Glycol (%) Ethenol 29 25 20 14

FREEZE PROTECTION (F)

10 15 20 25

38 30 22 15

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 al-

low 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 —

inputs, terminals and safety controls are checked for normal operation.

NOTE: The compressor will have a 5-minute anti-short cycle upon power up.

The unit will not operate until all the

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.

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.

HEATING STAGE 2 — In Heating Stage 2 mode, the Fan 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.

HEATING STAGE 3 — In Heating Stage 3 mode, the Fan 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 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

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 able 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 until a time schedule has been configured using either Field Assistant, i-Vu Open, BACview tem to enable/disable the BAS on/off point. The BAS point can be disabled by going to Config, then Unit, then Occupancy Schedules and changing the point from enable to disable then clicking OK.

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

Schedule_schedule schedule configured and stored in the unit. The schedule is accessible via the BACview 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 schedule_schedule. From here, enter either a Weekly or Exception schedule for the unit.

IAQ (indoor air quality) sensor mounted in the

handheld user interface.

Open, or a third party control system to enable/dis-

, Field Assis-

— The controller will be occupied 24/7

or a third party control sys-

control system to assign a time

— The unit will operate according to the

Handheld tool, i-Vu Open, or

Admin Password (1111), then go to

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 occu-

pancy status.

• There is a demand for cooling or heating in the unoccu-

pied 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) cal 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 the minimum SAT limit), the fan will be indexed to the maximum speed. If the SAT continues to fall 5 F below the minimum 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 moni-

— Whenever mechani-

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.

• Space temperature reading is valid.

• If unoccupied, the SPT is less than the unoccupied heating set point.

• OAT (if available) is less than the heating lockout temperature.

If all the above conditions are met, the heating outputs will

be energized as required, otherwise they will be deenergized. If the heating is active and should the SAT approach the 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 indexed to the maximum speed. If the SAT still continues to rise 5 F above the maximum limit, all heating stages 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 moni-

tor 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 con-

trol 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 CONTROLLED VENTILATION (DCV) — If the optional indoor air quality sensor is installed, the WSHP Open controller can maintain indoor air quality via a modulating OA damper providing demand controlled ventilation. The control operates the modulating OA damper during occupied periods. The control monitors the CO set points, adjusting the ventilation rate as required. The control

level and compares it to the configured

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

level in-

creases. The control will begin to proportionally increase ventilation when the CO point and will reach the full ventilation rate when the CO

level rises above the start ventilation set

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

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.

• Space temperature reading is valid.

• 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 function by using the water loop when the entering water loop temperature is suitable (at least 5 F below space temperature). If the water loop conditions are suitable, then the valve will modulate open as required to maintain a supply-air temperature that meets the load conditions. Should the economizer coil capacity alone be insufficient for a period greater than 5 minutes, or should a high humidity condition occur, then the compressor will also be started to satisfy the load. Should the SAT approach the minimum cooling SAT limit, the economizer valve will modulate closed during compressor operation.

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

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 DESCRIPTION OF OPERATION ALARM RELAY

Off

Slow Flash Fault Retry Open

Fast Flash Lockout Closed

Slow Flash Over/Under Voltage Shutdown

Flashing Code 1 Test Mode — No fault in memory Cycling Code 1

Flashing Code 2

Flashing Code 3

Flashing Code 4

Flashing Code 5

Flashing Code 6

Flashing Code 7

Flashing Code 8 Test Mode — PM in memory Cycling Code 8

Flashing 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.

Normal Mode Open

Normal Mode with

PM Warning

Complete C Control is

non-functional

Test Mode —

HP Fault in memory

Test Mode —

LP Fault in memory

Test Mode —

FP1 Fault in memory

Test Mode —

FP2 Fault in memory

Test Mode —

CO Fault in memory

Test Mode — Over/Under

shutdown in memory

Test Mode — FP1/FP2

Swapped Fault in memory

Cycle

(closed 5 sec.,

open 25 sec.)

Open

Open,

(Closed after

15 minutes)

Cycling Code 2

Cycling Code 3

Cycling Code 4

Cycling Code 5

Cycling Code 6

Cycling Code 7

Cycling Code 9

Table 28 — Complete C Control LED Code and

Fault Descriptions

LED

CODE

1 No fault in memory There has been no fault since

2 High-Pressure Switch HP switch opens instantly 3 Low-Pressure Switch LP switch opens for

4 Freeze Protection Coax

— FP1

5 Freeze Protection Air Coil —

FP2

6 Condensate overflow Sense overflow (grounded) for

(Autoreset)

FP — Freeze Protection HP — High Pressure LED — Light-Emitting Diode LP — Low Pressure PM — Performance Monitor

Over/Under Voltage Shutdown

8 PM Warning Performance Monitor Warning

9 FP1 and FP2

Thermistors are swapped

LEGEND

FAULT DESCRIPTION

the last power-down to powerup sequence

30 continuous seconds before or during a call (bypassed for first 60 seconds)

FP1 below Temp limit for 30 continuous seconds (bypassed for first 60 seconds of operation)

FP2 below Temp limit for 30 continuous seconds (bypassed for first 60 seconds of operation)

30 continuous seconds "R" power supply is <19VAC or

>30VAC

has occurred. FP1 temperature is higher than

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

WSHP Open Test Mode — To enter WSHP Open test

mode, navigate from the BACview

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.

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 vent damper 100% test, and preposition OA damper features

O economizer test, open

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 —

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.

There are 3 LED indicators on the Deluxe D control:

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

DESCRIPTION

Normal Mode On Off Flash Last Fault Code in Memory Open

Normal Mode with PM On Off Flashing Code 8

Deluxe D Control is non-functional

Tes t M od e — On Flash Last Fault Code in Memory Cycling Appropriate Code

Night Setback Flashing Code 2 — Flash Last Fault Code in Memory —

ESD Flashing Code 3 — Flash Last Fault Code in Memory — Invalid T-stat Inputs Flashing Code 4 — Flash Last Fault Code in Memory — No Fault in Memory On Off Flashing Code 1 Open

HP Fault Slow Flash Off Flashing Code 2 Open

LP Fault Slow Flash Off Flashing Code 3 Open FP1 Fault Slow Flash Off Flashing Code 4 Open FP2 Fault Slow Flash Off Flashing Code 5 Open

CO Fault Slow Flash Off Flashing Code 6 Open

Over/Under Voltage Slow Flash Off Flashing Code 7 Open (closed after 15 minutes)

HP Lockout Fast Flash Off Flashing Code 2 Closed

LP Lockout Fast Flash Off Flashing Code 3 Closed FP1 Lockout Fast Flash Off Flashing Code 4 Closed FP2 Lockout Fast Flash Off Flashing Code 5 Closed

CO Lockout Fast Flash Off Flashing Code 6 Closed

CO — Condensate Overflow HP — High Pressure ESD — Emergency Shutdown LP — Low Pressure FP — Freeze Protection PM — Performance Monitor

STATUS LED

(Green)

Off Off Off Open

LEGEND NOTES:

TEST LED

(Yellow)

FAULT LED (Red) ALARM RELAY

Cycle (closed 5 sec,

open 25 sec, …)

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.

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 en-

sure 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 evap-

orator 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.

Checking System Charge — Units are shipped with

Fig. 35 — Gravity Flow Method

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

PAIL

FUNNEL

CONDENSER

PAIL

3’ TO 4’

VENT PIPE

5’ APPROX

1” PIPE

SUCTION

PUMP SUPPORT

TANK

FINE MESH SCREEN

RETURN

GAS VENT

PUMP

PRIMING CONN.

GLOBE VALV ES

SUPPLY

1” PIPE

CONDENSER

REMOVE WATER REGULATING VALVE

Fig. 36 — Forced Circulation Method

full operating charge. If recharging is necessary:

1. Insert thermometer bulb in insulating rubber sleeve on

2. Connect pressure gage to discharge line near compressor.

3. After unit conditions have stabilized, read head pressure

4. From standard field-supplied Pressure-Temperature chart

5. Read liquid line temperature on thermometer; then

6. Compare the subcooling temperature with the normal

liquid line near filter drier. Use a digital thermometer for all temperature measurements. DO NOT use a mercury or dial-type thermometer.

on discharge line gage. NOTE: Operate unit a minimum of 15 minutes before

checking charge.

for R-410A refrigerant, find equivalent saturated condensing temperature.

subtract from saturated condensing temperature. The difference equals subcooling temperature.

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 single-

phase 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 nom-

inal 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.

WSHP Open Controller — With the WSHP Open con-

0.0

10.0

20.0

30.0

40.0

50.0

60.0

70.0

80.0

90.0

0.0 20.0 40.0 60.0 80.0 100.0 120.0 140.0

Temperature (degF)

Resistance (kOhm)

Fig. 37 — Thermistor Nominal Resistance

SUCTION

COMPRESSOR

DISCHARGE

COAX

EXPANSION

VALV E

FP2

FP1

LIQUID LINE

WATER IN

WATER OUT

CONDENSATE

OVERFLOW

(CO)

AIR COIL FREEZE PROTECTION

WATER COIL PROTECTION

THERMISTOR

(°F)

AIR

COIL

AIRFLOW

LEGEND

Fig. 38 — FP1 and FP2 Thermistor Location

COAX — Coaxial Heat Exchanger

Airflow Refrigerant Liquid Line Flow

troller option, the 100 most recent alarms can be viewed using the BACview

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.

alarm status and alarm history.

Thermostatic Expansion Valves — Thermostat-

ic 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.

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 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 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 follow-

ing 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.

— The symptoms of a failed TXV can be varied

— The most common causes of TXV

Diagnostics a TXV has failed. The following tools may be required for testing:

1. Refrigerant gage manifold compatible with the refriger-

2. Digital thermometer, preferably insulated, with wire leads

3. Refrigerant pressure-temperature chart for the refrigerant

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

—Several tests may be required to determine if

ant in the system

that can be connected directly to the tubing

used

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

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: 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

IMPORTANT: Due to the hygroscopic nature of the

information. POE oil in Puron refrigerant (R-410A) and other environmentally sound refrigerants, any component replace-

ment 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

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

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.

Table 30 — ECM Troubleshooting

FAULT DESCRIPTION SOLUTION

Motor rocks slightly when starting

Motor will not start No movement Check power at motor.

Motor rocks Check for loose or non-compliant motor mount.

Motor oscillates up and down while being tested off of blower

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

“Hunts” or “puffs” at high cfm (speed)

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

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

Blower will not shut off Check to see if there is current leakage from controls into G, Y, or W. Check for Triac switched

Excessive noise Noisy blower or cabinet Determine if it’s air, cabinet, duct, or motor noise.

“Hunts” or “puffs” at high cfm

Evidence of moisture Motor failure or malfunction has

(speed)

occurred and moisture is present Evidence of moisture present

inside air mover

This is normal start-up for ECM.

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.

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

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

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.

Check low voltage (thermostat) wires and connections.

Verify fan is not in delay mode. Wait until delay is complete. Check to see if “R” is missing/not connected at motor. Perform motor/control replacement check.

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

thermostat or solid state relay.

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.

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

Perform moisture check. See Moisture Check section in Troubleshooting.

CAUTION

Fig. 39 — ECM Pin Connectors

a50-8448

Stopped or Malfunctioned ECM Motor — Refer

Fig. 40 — ECM Troubleshooting Flow Diagram

a50-8447

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

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 DO NOT

Check motor, controls wiring, and connections thoroughly before replac-

Automatically assume the motor is bad.

ing motor. Orient connectors down so water cannot get in. Install “drip loops.” Locate connectors above 7 and 4 o’clock positions. Use authorized motor and control model numbers for replacement. Replace one motor or control model number with another (unless

replacement is authorized).

Keep static pressure to a minimum by:

• Using high efficiency, low-static filters.

• Keeping filters clean.

• Designing ductwork for minimum static and maximum comfort.

• Improving ductwork when replacement is necessary.

Use high pressure drop filters. Use restricted returns.

Size equipment wisely. Oversize system then compensate with low airflow. Check orientation before inserting motor connectors. Plug in power connector backwards.

Force plugs.

Table 32 — WSHP Troubleshooting

Main Power Problems X X Green Status LED Off Check line voltage circuit breaker and disconnect.

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

LED — Light-Emitting Diode RV — Reversing Valve TXV — Thermostatic Expansion Valve

FAULT HEATING COOLING POSSIBLE CAUSE SOLUTION

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.

Check water flow adjust to proper flow rate. Bring water temperature within design parameters.

Check fan motor operation and airflow restrictions. Dirty air coil — construction dust etc. External static too high. Check blower performance per Tables 9-13.

Tables 20-23.

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

Clip JW2 jumper for antifreeze (10F) use.

Check fan motor operation and airflow restrictions. External static too high. Check blower performance per Tables 9-13.

parameters. Normal airside applications will require 30 F only.

Check slope of unit toward outlet. Poor venting. Check vent location.

LEGEND

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

X Water temperature out of range in

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

X Air temperature out of range in heating Bring return-air temperature within design parameters. X X Overcharged with refrigerant Check superheat/subcooling vs typical operating condition per

X X Bad HP switch Check switch continuity and operation. Replace. X X Insufficient charge Check for refrigerant leaks. X Compressor pump down at start-up Check charge and start-up water flow.

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

X Inadequate antifreeze level Check antifreeze density with hydrometer. X Improper freeze protect setting (30F

X Water temperature out of range Bring water temperature within design parameters. X X Bad thermistor Check temperature and impedance correlation.

X X Bad thermistor Check temperature and impedance correlation. X X Blocked drain Check for blockage and clean drain. X X Improper trap Check trap dimensions and location ahead of vent.

cooling

vs 10F)

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

X Air temperature out of range Too much cold vent air. Bring entering air temperature within design

X Improper freeze protect setting (30F

vs 10F)

X Poor drainage Check for piping slope away from unit.

X Moisture on sensor Check for moisture shorting to air coil.

Table 32 — WSHP Troubleshooting (cont)

FAULT HEATING COOLING POSSIBLE CAUSE SOLUTION

Over/Under Voltage — Code 7 (Auto Resetting)

Performance Monitor — Code 8

FP1 and FP2 Thermistors — Code 9

No Fault Code Shown X X No compressor operation See Scroll Compressor Rotation section.

Swapped Thermistor — Code 9

Unit Short Cycles X X Dirty air filter Check and clean air filter.

Only Fan Runs X X Thermostat position Ensure thermostat set for heating or cooling operation.

Only Compressor Runs X X Thermostat wiring Check G wiring at heat pump. Jumper G and R for fan operation.

Unit Does Not Operate in Cooling

Insufficient Capacity/ Not Cooling or Heating Properly

LEGEND

LED — Light-Emitting Diode RV — Reversing Valve TXV — Thermostatic Expansion Valve

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

Check power supply wire size. Check compressor starting. Check 24 vac and unit transformer tap for correct power supply voltage.

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

X Heating mode FP2>125F Check for poor airflow or overcharged unit.

X Cooling mode FP1>125F OR

FP2<40F

X FP1 temperature is higher

X X Compressor overload Check and replace if necessary. X X Control board Reset power and check operation. X X FP1 and FP2 swapped Reverse position of thermistors.

X X Unit in 'Test Mode' Reset power or wait 20 minutes for auto exit. X X Unit selection Unit may be oversized for space. Check sizing for actual load of space. X X Compressor overload Check and replace if necessary.

X X Unit locked out Check for lockout codes. Reset power. X X Compressor overload Check compressor overload. Replace if necessary. X X Thermostat wiring Check Y and W wiring at heat pump. Jumper Y and R for compressor

X X Fan motor relay Jumper G and R for fan operation. Check for line voltage across BR

X X Fan motor Check for line voltage at motor. Check capacitor.

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

X X Leaky ductwork Check supply and return air temperatures at the unit and at distant duct

X X Low refrigerant charge Check superheat and subcooling per Tables 20-23. X X Restricted metering device Check superheat and subcooling per Tables 20-23. Replace.

X X Thermostat improperly located Check location and for air drafts behind thermostat. X X Unit undersized Recheck loads and sizing check sensible cooling load and heat pump

X X Scaling in water heat exchanger Perform condenser cleaning. X X Inlet water too hot or cold Check load, loop sizing, loop backfill, ground moisture.

than FP2 temperature.

X FP2 temperature is higher

than FP1 temperature.

X Reversing valve Set for cooling demand and check 24 vac on RV coil and at control.

X Thermostat setup Check for 'O' RV setup not 'B'. X Thermostat wiring Check O wiring at heat pump. Jumper O and R for RV coil 'Click'.

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

X Defective reversing valve Set for cooling demand and check 24 vac on RV coil and at control.

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

Check for poor water flow or airflow.

Swap FP1 and FP2 thermistors.

operation in Test mode.

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

contacts. Check fan power enable relay operation (if present).

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 fan motor operation and airflow restrictions. External static too high. Check blower performance per Tables 9-13.

registers if significantly different, duct leaks are present.

If RV is stuck, run high pressure up by reducing water flow and while operating, engage and disengage RV coil voltage to push valve.

capacity.

Table 32 — WSHP Troubleshooting (cont)

FAULT HEATING COOLING POSSIBLE CAUSE SOLUTION

High Head Pressure X Reduced or no airflow in heating Check for dirty air filter and clean or replace.

Check fan motor operation and airflow restrictions. External static too high. Check blower performance per Tables 9-13.

X Reduced or no water flow in

cooling

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

X Air temperature out of range in

X X Unit overcharged Check superheat and subcooling. Reweigh in charge. X X Noncondensables in system Remove refrigerant, evacuate system and charge unit. X X Restricted metering device Check superheat and subcooling per Tables 20-23. Replace.

Low Suction Pressure X Reduced water flow in heating Check pump operation or water valve operation/setting.

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

X X Insufficient charge Check for refrigerant leaks.

Low Discharge Air Temperature in Heating

High Humidity X Too high airflow Check blower performance per Tables 9-13

Low Refrigerant Suction Pressure

High Refrigerant Superheat X X Insufficient refrigerant charge Locate and repair leak.

High Refrigerant Subcooling

TXV and/or Low Pressure Tubing Frosting

Equalizer Line Condensing or Frosting

X Too high airflow Check blower performance per Tables 9-13. X Poor performance See “Insufficient Capacity.”

X Normal operation Check/compare with unit Installation Manual for typical operating temper-

X Reduced water flow Check pump operation.

X Water temperature out of range Bring water temperature within proper range. X Scaling in water to refrigerant

X X Return air temperature below

X X Insufficient refrigerant charge Locate and repair leak. X X Improperly located TXV sensing

X X Failed or restricted metering

X X Improperly located TXV sensing

X X Failed or restricted metering

X X Excessive refrigerant charge Remove refrigerant as needed. X X Failed or restricted metering

X Normal operation May occur when entering water temperature is close to minimum. X X Insufficient refrigerant charge Locate and repair leak. X X Failed or restricted metering

X X Failed or restricted metering

heating

X Scaling in water heat exchanger Perform condenser cleaning.

X Reduced airflow in cooling Check for dirty air filter and clean or replace.

X Air temperature out of range Too much cold vent air. Bring entering air temperature within design

X Unit oversized Recheck loads and sizing check sensible cooling load and heat pump

heat exchanger

X Reduced airflow Check for dirty air filter.

minimum

X Supply air bypassing to return air

stream (zone systems).

bulb

device

bulb

device

LEGEND

LED — Light-Emitting Diode RV — Reversing Valve TXV — Thermostatic Expansion Valve

Check pump operation or valve operation/setting. Check water flow adjust to proper flow rate. See Tables 19 and 24.

Bring return-air temperature within design parameters.

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

Check fan motor operation and airflow restrictions. External static too high. Check blower performance per Tables 9-13.

parameters.

capacity.

atures and pressures chart.

Check strainer or filter. Improper flow regulator.

Conduct water quality analysis.

Check for dirty air coil. Check fan motor operation. External static pressure exceeds fan operating parameters. Space temperature too cold.

Excessive fresh air. Check for leaking ductwork.

Locate bulb on suction line between reversing valve and compressor.

Failed TXV power head, capillary or sensing bulb. Plugged TXV strainer.

Locate bulb on suction line between reversing valve and compressor.

Failed TXV power head, capillary or sensing bulb. Plugged TXV strainer.

Failed TXV power head, capillary or sensing bulb. Plugged TXV strainer. Failed TXV power head, capillary or sensing bulb. Plugged TXV strainer.

APPENDIX A — WSHP OPEN SCREEN CONFIGURATION









SCREEN NAME POINT NAME

Operating Mode

SPT F Displays SPT SAT F Displays SAT

Condenser Leaving

Temperature

Condenser Entering

Temperature

Fan

Equipment

Status

Alarm Status

Sensor

Calibration

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

Compressor Capacity 0 - 100% Displays compressor capacity

Damper Position 0 - 100%

O Economizer 0 - 100% Displays position of economizer valve

Auxiliary Heat 0 - 100%

Space RH 0 - 100%

Dehumidification Inactive/Active

IAQ CO

SPT Alarm Status

Alarming SPT F

SPT Alarm Limit F

SPT Sensor Alarm

Status

IAQ Alarm Status Normal/Alarm Current IAQ/ventilation condition

Compressor Alarm

Status

SAT Alarm Status Normal/Alarm Current SAT condition

Condensate Overflow

Alarm Status

Condenser Water Tem-

perature Alarm Status

Filter Alarm Status Normal/Alarm Current filter condition

Space RH Alarm Status Normal/Alarm Current space RH condition

OAT Alarm Status Normal/Alarm

Airside Linkage Status Normal/Alarm Current linkage status if enabled

Condenser Water

Linkage

SAT

SAT Offset X -9.9 - 10.0 F 0 F Used to correct sensor reading

Leaving Condenser Water Temperature

Leaving CW Offset X -9.9 - 10.0 F 0 F Used to correct sensor reading

Rnet Sensor

Temperature

Rnet Offset X -9.9 - 10.0 F 0 F Used to correct sensor reading

RH % Displays Space RH value

RH Sensor Offset X -15% - 15% 0 % Used to correct sensor reading

LEGEND

PASSWO RD

LEVEL

No Password

Required

No Password

Required

Admin Password level access only

EDITABLE RANGE DEFAULT NOTES

Off, Fan Only, Economize,

Cooling, Heating, Cont Fan,

Test, Start Delay, Dehumidify

Off/Low Speed/

Medium Speed

High Speed/On

0 - 9999 ppm Displays the space CO2 level

Normal/Alarm

Normal/Alarm Current compressor condition

Normal/Alarm

Normal/Alarm Current linkage status if enabled

F Display SAT

F Displays SPT

Displays unit operating mode

Displays leaving condenser

water temperature

Displays entering condenser

water temperature (Value

will not update when compressor

Displays current damper position (Viewable only if Ventilation DMP

reheat valve (Viewable only if Leaving

Air Auxiliary Heat Type = 2 position,

Displays space RH% (Viewable only if

Displays if dehumidification is active

Dehumidification Reheat = Installed)

exceeded the alarm limit (when SPT

Displays the SPT alarm limit that was

exceeded; causing the alarm condition

(when SPT alarm above is in Alarm)

SPT sensor - ALARM is displayed

should the sensor fail to communicate

Current status of the condensate

is operating)

Displays fan speed status

Type = 2 position or DCV)

Displays position of auxiliary

1 stage Elect or Modulating)

Humidity Sensor = Installed)

(Viewable only if Factory

Displays current space

temperature condition Displays the SPT that

alarm above is in Alarm)

Displays the status of the Rnet

with the control module

drain (overflow switch)

Current status of the

condenser water

Current status of the OAT

broadcast function

Displays Leaving Condenser

Water Temperature

APPENDIX A — WSHP OPEN SCREEN CONFIGURATION (cont)





SCREEN NAME POINT NAME

Operating Mode

Fan Operating Mode Auto/Continuous/Always On

Occupancy Status Unoccupied/Occupied Displays the current occupancy status

Occupancy Control

Outside Air

Temperature

SPT F Displays SPT

SPT Status

SPT Sensor Status Inactive/Connected

Condensate Overflow Normal/Alarm

Cooling Set Point F

Unit

Maintenance

System Settings

Occupancy

Maintenance

Schedule

Configuration

Heating Set Point F

Set Point Adjustment F

Auxiliary Heat Control

Set Point

O Economizer

Control Set Point

Calculated IAQ/

Ventilation Damper

position

Active Compressor

Stages

SAT F Displays SAT

Reset Filter Alarm X No/Yes

Overflow Contact Closed/Open

Occupancy Contact Closed/Open

BAS/Keypad Override X

OAT Input N/A / Network

BACnet X See TPI

Keypad Configuration X Mapping

Password X Changes password

Network X See TPI

BACnet Time Master X See TPI

Clock Set X Changes clock/time setting

Override Schedules

Pushbutton Override Inactive/Active Occupied

Keypad Override

Schedules Inactive/Active Occupied

Occupancy Contact Inactive/Active Occupied

BAS on/off Inactive/Active Occupied

Local Occupancy

Schedules

Local Holiday

Schedules

Local Override

Schedules

BACnet Occupancy

Schedules

LEGEND

PASSWORD

LEVEL

No Password

required

No Password

required

User/Admin

Password level

access

EDITABLE RANGE DEFAULT NOTES

Off, Fan Only,Economize,

Cooling, Heating, Cont Fan, Test,

Start Delay, Dehumidify

Always Occupied/Local Schedule/

BACnet Schedule/BAS Keypad/

Occupied Contact/Holiday Schedule/

Override Schedule/Pushbutton

Override/Unoccupied None

Normal/Above Limit/Below

Limit/Sensor Failure

0/1/2

Inactive/Occupied/

Unoccupied

Inactive/Active Occupied

Inactive/Active Occupied/Active

Unoccupied

X Disable/Enable Enable

X Disable/Enable Disable

Inactive

Displays unit operating mode

Displays how the fan is configured

Displays OAT (Viewable only if OAT

Displays the connection status

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

Displays the ventilation damper

position calculated by the DCV control

Displays the actual number of

Used to reset the filter alarm timer after

the filter has been cleaned or replaced

Displays the state of the condensate

Displays the state of the external/

remote occupancy input switch contact

Provides capability to force the

occupied or unoccupied mode

Displays if an OAT value is being

Used to display the active and

inactive occupancy control inputs

Used to define which occupancy inputs

to operate

Displays the origin of the

occupancy control

is a network broadcast)

Displays the SPT 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

used for economizer control

compressor stages operating

overflow switch contact

equipment to operate in an

received from the Network

are used to determine

occupancy mode.

APPENDIX A — WSHP OPEN SCREEN CONFIGURATION (cont)











SCREEN NAME POINT NAME

Occupied Heating

Occupied Cooling X 55 - 99 F 76 F

Unoccupied Heating X 40 - 90 F 55 F

Unoccupied Cooling X 55 - 99 F 90 F

Effective Heating

Set Point

Effective Cooling

Set Point

Optimal Start

Configuration

Occupied RH

Set Points

Configuration

Schedule

Weekly Schedule

Configuration

Schedule

Exception

Schedules 1 - 12

LEGEND

Set Point

Unoccupied RH

Set Point

DCV CTRL Start

Set Point

DCV Max CTRL

Set Point

Start Time

End Time X 00:00 - 24:00 18:00

Mon X No/Yes Yes

Tu e X N o /Ye s Ye s

Wed X No/Yes Yes

Thur X No/Yes Yes

Fri X No/Yes Yes

Sat X No/Yes No

Sun X No/Yes No

Start Month

Start Day X 0 - 31 0

Start Time X 00:00 - 23:59 0:00

End Month X 0 - 12 0

End Day X 0 - 31 0

End Time X 00:00 - 24:00 0:00

PASSWORD

LEVEL

User/Admin

Password level

access

User/Admin

Password level

access

User/Admin

Password level

access

EDITABLE RANGE DEFAULT NOTES

X 40 - 90 F 72 F

X0 - 10 F

X 0 - 100% 65%

X 0 - 100% 90%

X 0 - 9999 ppm 500 ppm

X 0 - 9999 ppm 1050 ppm

X 00:00 - 23:59 06:00

X0 - 120

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

Defines the start time for an

Defines the ending time of an

Determines if this day is included

Defines the start month of this

Defines the start day of this holiday

Determines the start time for this

Defines the month to end this

Defines the day to end this holiday

Determines the time to end this

point)

occupied period

in this schedule

hoilday schedule

schedule

hoilday schedule

schedule

APPENDIX A — WSHP SCREEN OPEN CONFIGURATION (cont)











SCREEN NAME POINT NAME

Fan Mode

Fan On Delay X 0 - 30 sec 10 sec

Fan Off Delay X 0 - 180 sec 45 sec

Heating Enable X Disable/Enable Enable

Cooling Enable X Disable/Enable Enable

Minimum SAT in

Configuration

Unit

Configuration

Service

Test

LEGEND

Cooling

Maximum SAT in

Heating

Damper Ventilation

Positio n

DCV Maximum Vent

Positio n

Filter Alarm Timer X 0 - 9999 hrs 0 hrs Disables Filter Alarm if set to 0

Pushbutton Override X Disable/Enable Enable Enables Override Feature on Rnet sensor

SPT Sensor Set Point

Adjustment

Lockout Cooling if

OAT <

Lockout Heating if

OAT >

Power Fail Restart

Delay

Occupancy Schedules X Disable/Enable Enable Enables unit occupied

Set Point Separation X 2 - 9 F 4 F

Test Mode

Fan Test X Disable/Enable Disable

Fan Speed

Compressor Test X Disable/Enable Disable

Dehumidification Test X Disable/Enable Disable

Testing Compressor

Aux Heating Test X Disable/Enable Disable

O Economizer Test X Disable/Enable Disable

Preposition OA

Damper

Open Vent

Damper 100%

SAT F Displays SAT

LCWT F

PASSWORD

LEVEL

Admin Password

level access only

Admin Password

level access only

EDITABLE RANGE DEFAULT NOTES

Auto= Intermittant operation during both

occupied and unoccupied periods/

X40 - 60 F50 F

X 80 - 140 F 110 F

X 0 - 100% 100%

X Disable/Enable Enable

X -65 - 80 F -65 F

X 35 - 150 F 150 F

X 0 - 600 sec 60 sec Delay before equipment starts

X Disable/Enable Disable

X Disable/Enable Disable Used to test OA damper operation

Auto/Continuous/

Always On

Off/Low Speed/Medium

Speed/High Speed/On

Inactive/Heating/Cooling/

Dehumidify/TimeGard

Wait

Continuous

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

Usually set at 100% - Used to limit maximum

Enables Set Point adjustment capability

Cooling is locked out when OAT is less than

configured value and OAT is actively being

Heating is locked out when OAT is greater

than configured value and OAT is actively

Used to enable test mode. Will automatically

Used to test all fan speeds. Sequences fan

from low to high and operates each speed for

1 minute. Resets to disable on completion

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

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

damper type = DCV

damper opening in DCV mode

on Rnet Sensor

broadcast

being broadcast

Used to enforce minimum

set point separation

reset to disable after 1 hour

Displays current fan operation

step. Resets to disable on completion.

Used to test dehumification mode -

Operates for 2 minutes. Resets to

disable on completion.

Displays compressor test mode

Used to test auxiliary heat.

Sequences fan on and enables

heating coil for 1 minute. Resets to

disable on completion

Used to preposition OA damper

actuator to set proper preload

Displays Leaving Condenser

Water Temperature

APPENDIX A — WSHP SCREEN OPEN CONFIGURATION (cont)







SCREEN NAME POINT NAME

# of Fan Speeds

G Output Type X Fan On/Fan Low Fan On

Compressor Stages X One Stage/Two Stages One Stage

Reversing Valve Type X O type output/B type output O type

Leaving Air Auxiliary

Heat Type

Entering Air Water

Economizer Type

2-Position Water

Val ve Type

Modulating Water

Val ve Type

Ventilation Damper

Ty pe

Damper Actuator Type X (0-10 volt)/(2-10 volt) 0-10 volt

Configuration

Service

Configuration

LEGEND

Humidity Sensor X None/Installed None

Factory Dehumidifica-

tion Reheat Coil

Occupancy Input Logic

Condensate Switch

Alarm Delay

Condensate Switch

Alarm State

Minimum Condenser

Water Temperature in

Heating

Maximum Condenser

Water Temperature in

Heating

Minimum Condenser

Water Temperature in

Cooling

Maximum Condenser

Water Temperature in

Cooling

IAQ sensor

minimum input

IAQ sensor

maximum input

IAQ sensor

minimum output

IAQ sensor

maximum output

PASSWORD

LEVEL

Admin Password

level access only

EDITABLE RANGE DEFAULT NOTES

X 1,2,3 3

X None/2-Position/Modulating None

X Normally Closed/Normally Open

X None/2-Position/DCV None

X None/Installed None

X Occupied Open/Occupied Closed

X 5 - 600 seconds 10 sec

X Alarm OPEN/Alarm CLOSED

X25 - 60 F60 F

X 65 - 100 F 90 F

X30 - 60 F60 F

X 85 - 120 F 95 F

X 0 - 5 ma 4 ma

X 5 - 20 ma 20 ma

X 0 - 9999 ppm 0 ppm

X 0 - 9999 ppm 2000 ppm

None/2-Position HW/1 Stage

Electric/Modulating HW

None

Normally

Closed

Normally

Closed

Occupied CLOSED

Alarm

CLOSED

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

Set to Installed if factory-installed

Used to determine external occu-

pancy switch contact occupied state

Delay before equipment alarms on

acceptable water loop temperature

Maximum output current (mA) for

Corresponding value in ppm 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

dehumidification reheat coil

is present

high condensate level

Determine Alarm state of

condensate switch input

Determines the minimum

to start heating

Determines the maximum

to start heating

Determines the minimum

to start cooling

Determines the maximum

to start cooling

Minimum output current (mA)

for IAQ sensor

IAQ sensor

minimum output current

maximum output current

APPENDIX A — WSHP SCREEN OPEN CONFIGURATION (cont)











SCREEN NAME POINT NAME

SPT Occupied Alarm

Hysteresis

SPT Alarm Delay X 0 - 30 min per degree 10 min

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

Configuration

Alarm

Configuration

Linkage

Space Humidity Alarm

Delay

Space Humidity Unoccu-

pied High Alarm Limit

IAQ/Ventilation Occupied

High Alarm Limit

IAQ/Ventilation

Alarm Delay

Rnet Sensor SPT Alarm X Ignore/Display Ignore

Rnet Sensor SAT Alarm X Ignore/Display Ignore

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

Loop Control Network

Number

Loop Control Network

Address

Number of Linked Heat

Pumps

LEGEND

PASSWO RD

LEVEL

Admin Password level access only

EDITABLE RANGE DEFAULT NOTES

Defines the hysteresis applied above

X2 - 20 F5 F

X 35 - 90 F 45 F

X 45 - 100 F 95 F

X 15 - 90 F 45 F

X 90 - 175 F 120 F

X 5 - 600 sec 10 sec

X 45% - 100% 100%

X 0 - 30 min per % RH 5 min

X 45% - 100% 100%

X 0 - 9999 ppm 1100 ppm

X 0.1 - 1.0 min per ppm 0.25 min

X Ignore/Display Display

X Ignore/Display Ignore

the cooling and below the heating set

points before an alarm condition will

Used to calculate the delay time before

an alarm is generated after the alarm

Defines the fixed unoccupied

Defines the fixed minimum

Defines the fixed maximum

Defines the delay time before an alarm

is generated after the alarm condition

Defines the fixed occupied

high space RH alarm limit

Used to calculate the delay time before

an alarm is generated after the alarm

Defines the fixed unnoccupied

high space RH alarm limit

Defines the fixed occupied high

space IAQ/Ventilation alarm limit

Used to calculate the delay time before

an alarm is generated after the alarm

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

Determines if the Condenser Water

Temperature alarm is displayed on the

Determines if the Condensate

Overflow alarm is displayed on the

Determines if the Dirty Filter alarm is

displayed on the local Rnet sensor

Determines if the High Space

RH alarm is displayed on the

occur

condition occurs

ow SPT alarm limit

high SPT alarm limit

SAT alarm limit

occurs

condition occurs

sensor

local Rnet sensor

See TPI

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 62 7-10 Replaces: 50PT-3SI

50PTH,PTV,PTD

START-UP CHECKLIST

CUSTOMER:___________________________ JOB NAME: _______________________________________

MODEL NO.:___________________________ 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 PHASE CA VOLTS

(if 3 phase) (if 3 phase)

PHASE AB AMPS

PHASE BC AMPS PHASE CA AMPS

(if 3 phase) (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

FFLUID OUT F PSI FLOW

HEATING CYCLE: FLUID IN

FFLUID OUT F PSI FLOW

AIR COIL COOLING CYCLE:

AIR IN

HEATING CYCLE: AIR IN

FAIR OUT F

CL-1

HEATING CYCLE ANALYSIS

a50-8449

SUCTION

COMPRESSOR

DISCHARGE

COAX

EXPANSION

VALVE

°F

AIR

COIL

°F

PSI

FLUID OUT

FLUID IN

°F

PSI

°F

LIQUID LINE

PSI

°F

SAT

LOOK UP PRESSURE DROP IN TABLES 20-23 TO DETERMINE FLOW RATE

a50-8450

PSI

SAT

°F

AIR

COIL

°F

LIQUID LINE

COOLING CYCLE ANALYSIS

EXPANSION

VALVE

°F

FLUID IN

°F

PSI

COAX

FLUID OUT

°F

PSI

LOOK UP PRESSURE DROP IN TABLES 20-23 TO DETERMINE FLOW RATE

SUCTION

COMPRESSOR

DISCHARGE

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

*Use 500 for water, 485 for antifreeze.

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 CL-2 7-10 Replaces: 50PT-3SI

(DEG F)

CUT ALONG DOTTED LINE CUT ALONG DOTTED LINE

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Carrier 50PTH, PTV User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual