Carrier 50VQP084-300 User Manual

Vertical Large Capacity Water Source Heat Pumps

with PURON® Refrigerant (R-410A)

Installation, Start-Up, and

Service Instructions

AQUAZONE™

50VQP084-300

50 Hz

CONTENTS

Page

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

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

INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-17

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

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

• STORAGE

•PROTECTION

•INSPECT UNIT

Step 3 — Locate Unit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Step 4 — Mount the Unit . . . . . . . . . . . . . . . . . . . . . . . . . 6

• DISCHARGE CONFIGURATION CONVERSION

• CONTROL BOX/MOTOR ACCESS CONFIGURATION CONVERSION

Step 5 — Check Duct System . . . . . . . . . . . . . . . . . . . . 9

• SO U N D AT T E NUATI O N

• EXISTING DUCT SYSTEM

Step 6 — Install Condensate Drain . . . . . . . . . . . . . . . 9

• VENTING

Step 7 — Pipe Connections . . . . . . . . . . . . . . . . . . . . . 10

• WATER LOOP APPLICATIONS

• GROUND-LOOP APPLICATIONS

• GROUND-WATER APPLICATIONS

Step 8 — Wire Field Power Supply . . . . . . . . . . . . . . 11

• POWER CONNECTION

• SUPPLY VOLTAGE

• 420-VOLT OPERATION

Step 9 — Wire Field Controls. . . . . . . . . . . . . . . . . . . . 17

• THERMOSTAT CONNECTIONS

• WATER FREEZE PROTECTION

• AIR COIL FREEZE PROTECTION

• ACCESSORY CONNECTIONS

• WATER SOLENOID VALVES

PRE-START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17-32

System Checkout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Airflow and External Static Pressure . . . . . . . . . . . 18

FIELD SELECTABLE INPUTS . . . . . . . . . . . . . . . .33,34

Complete C Control Jumper Settings. . . . . . . . . . . 33

Complete C Control DIP Switches. . . . . . . . . . . . . . 33

Deluxe D Control Jumper Settings . . . . . . . . . . . . . 33

Deluxe D Control DIP Switches . . . . . . . . . . . . . . . . 33

Deluxe D Control Accessory Relay

Configurations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34-36

Operating Limits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Start Up System. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

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

Unit Start-Up Cooling Mode . . . . . . . . . . . . . . . . . . . . . 35

Unit Start-Up Heating Mode . . . . . . . . . . . . . . . . . . . . . 35

Flow Regulation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

Flushing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

Page

Antifreeze . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

Cooling Tower/Boiler Systems . . . . . . . . . . . . . . . . . . 36

Ground Coupled, Closed Loop and Plateframe

Heat Exchanger Well Systems . . . . . . . . . . . . . . . . 36

OPERATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36,37

Power Up Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

Units with Aquazone Complete C Control . . . . . . . 37

Units with Aquazone Deluxe D Control. . . . . . . . . . 37

COMPLETE C AND DELUXE D BOARD

SYSTEM TEST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37-39

Test Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

Retry Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Aquazone Deluxe D Control LED Indicators . . . . . 39

SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39,40

Filters

Water Coil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Condensate Drain Pans . . . . . . . . . . . . . . . . . . . . . . . . . 39

Refrigerant System. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Condensate Drain Cleaning . . . . . . . . . . . . . . . . . . . . . 39

Air Coil Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Condenser Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Checking System Charge . . . . . . . . . . . . . . . . . . . . . . . 40

Refrigerant Charging. . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

Air Coil Fan Motor Removal . . . . . . . . . . . . . . . . . . . . . 40

TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . 40-43

Thermistor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

Control Sensors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

50VQP START-UP CHECKLIST . . . . . . . . . . . CL-1,CL-2

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

IMPORTANT: Read the entire instruction manual before starting installation.

SAFETY CONSIDERATIONS

Installation and servicing of air-conditioning equipment can be hazardous due to system pressure and electrical components. Only trained and qualified service personnel should install, repair, or service air-conditioning equipment.

Untrained personnel can perform basic maintenance functions of 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 your 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.

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

Catalog No. 04-53500080-01 Printed in U.S.A. Form 50VQP-C1SI Pg 1 11-10 Replaces: New

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, U.S.A.) 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 you see this symbol 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™ water source heat pump systems.

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

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 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.

Vertical units are designed for indoor installation only and are typically installed in a floor-level closet or a small mechanical room. Refer to Fig. 1 for an example of a typical vertical installation. See Fig. 2 and 3 for overall unit dimensions.

Installation, operation and

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. Verify unit is correct model for entering water temperature of job.

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

3. 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.

4. Check local codes to be sure a secondary drain pan is not required under the unit.

5. 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.

6. Provide sufficient space for duct connection.

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

8. 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.

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

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

11. 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 for immediate installation upon its arrival 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.

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

Table 1 — 50VQP Unit Physical Data

Optional Discharge

Supply Air

Optional Discharge

Access Panel

Vibration Pad

Control Box

Supply Air

Supply Water

Return Water

Balancing Valve

Valves

Trap

Condensate

24 V Remote Mtd. Stat

Power Supply

Disconnect Switch or Per Local Codes

Condensate

Water In

Water Out

Unions

Fig. 1 — Typical 50VQP Unit Installation

UNIT 50VQP 084 096 120 150 168 192 240 300 COMPRESSOR QUANTITY Scroll (1) Scroll (2) Factory Charge HFC-410A (kg) per circuit 3.97 4.42 6.35 7.03 3.97 4.42 6.35 7.03 BLOWER MOTOR Blower Motor Quantity 1 Standard Motor (kW) .75 1.12 1.49 2.24 1.49 2.24 3.73 3.73 Large Motor (kW) 1.12 1.49 2.24 3.73 2.24 3.73 5.60 5.60 BLOWER No. of Blowers 12

Blower Wheel Size D x W (cm) 38.1 x 27.9

38.1 x

38.1

38.1 x 27.9

WATER CONNECTION SIZE

FPT (in.) [mm] 1-1/2 [38.1] 2 [50.8]

COAX VOLUME Volume (liters) 8.28 9.37 13.11 18.29 24.08 27.98 CONDENSATE CONNECTION SIZE FPT (in.) [mm] 1 [25.4] AIR COIL DATA Air Coil Dimensions H x W (cm) 91.4 x 121.9 91.4 x 121.9 Air Coil Total Face Area (sq m) 1.11 2.22 Air Coil Tube Size (cm) 3/8 [0.953] Air Coil Fin Spacing (fins per cm) 5.54.725.54.72 Air Coil Number of Rows 234234 MISCELLANEOUS DATA Filter Standard Throwaway (qty) (cm) (4) 45.74 x 63.5 x 2.5 (8) 45.74 x 63.5 x 2.5 Weight - Operating (kg) 399 422 435 725 755 769 Weight - Packaged (kg) 406 429 442 739 769 782

LEGEND FPT — Female Pipe Thread NOTES:

1. All units have grommet and spring compressor mountings, and

2.2 cm and 3.5 cm electrical knockouts.

2. Use the lowest maximum pressure rating when multiple options are combined:

OPTION MAXIMUM PRESSURE (kPa)

Base Unit 3100

Motorized Water Valve 2750

Internal Secondary Pump 999

38.1 x

38.1

2-1/2

[63.5]

Fig. 2 — 50VQP084-150 Unit Dimensions

CONNECTIONS 50VQP084-120 50VQP150

Water Inlet (See Note 7) 11/2 in. FPT 2 in. FPT

Water Outlet (See Note 7) 11/2 in. FPT 2 in. FPT

Condensate Drain (See Note 8) 1 in. FPT 1 in. FPT

High Voltage Access (See Note 9) 1

/8 in. 13/8 in.

Low Voltage Access (See Note 9)

/8 in.

a50-8436

UNIT

50VQP

OVERALL

CABINET (cm)

DISCHARGE

CONNECTIONS (cm)

Duct Flange

WATER

CONNECTIONS (cm)

ELECTRICAL

KNOCKOUTS (cm)

RETURN AIR

CONNECTIONS (cm)

(Using Return Air Opening)

DepthBWidthCHeight

Supply

Width

Supply

Depth

FK1-Water

Inlet

1-Water

Outlet

M 3-

Condesate

NO1O2P QRSReturn

Depth

T Return Height

084-120 86.4 134.9 200.7 44.5 44.6 45.1 78.7 7.6 68.6 65.1 78.7 96.4 87.7 2.5 7.6 121.9 82.2 113.3 6.9

150 86.4 134.9 200.7 54.4 44.6 45.1 78.7 7.6 68.6 65.1 78.7 96.4 87.7 2.5 7.6 121.9 82.2 113.3 6.9

LEGEND

NOTES:

1. All dimensions in centimeters.

2. Units require 0.9 m clearance for water connections, CAP, CSP, MSP, and BSP service access.

3. Overall cabinet height dimension does not include duct flange when in top discharge configuration.

4. Overall cabinet width dimension does not include filter rack and duct flange when on front or back discharge configuration.

5. Side service access must be 0.9 m on either side that connections are made. If no connections are made on a side, then service access can be 15 mm minimum.

6. While access to all removable panels is not required, installer should take care to comply with all building codes and allow adequate clearance for future field service.

7. Water inlet and water outlet connections are available on either side (left or right) of the unit. Two MPT plugs are shipped loose in a plastic bag tied to the water leg in front of the unit. Installer must plug water inlet/outlet side not being connected to.

8. Condensate drain is available on either side (left or right) of unit. Drain hose and drain connection will be tied inside the unit. Installer must untie the drain hose and connect to the condensate drain hole of installer’s choice.

9. Electrical access is available on either side (left or right) of unit and is also available (left or right) in the front of the unit.

10. Overall depth — add 7.9 cm for 2.5 or 5 cm filter. Add 13 cm for 10 cm filter.

BSP —Blower Service Panel CAP — Control Access Panel CSP — Compressor Service Panel MSP — Motor Service Panel NRP — Non-Removable Panel

ALL CONFIGURATIONS REQUIRE SERVICE ACCESS AREA SHOWN BELOW

FRONT RETURN TOP DISCHARGE

NRP

AIR OUT

BSP

AIR OUT

NRP

Control Box

NRP

CAP+MSP

RETURN AIR

BSP

CSP

BSP

CAP+MSP

CSP+CAP+MSP

NOTE 5

19.3

REAR RETURN TOP DISCHARGE

19.3

REAR RETURN FRONT DISCHARGE

FRONT RETURN REAR DISCHARGE

SIDE

SERVICE ACCESS

(SEE NOTE)

SERVICE ACCESS

91 CM

FRONT AND BACK

4.3

Fig. 3 — 50VQP168-300 Unit Dimensions

CONNECTIONS 50VQP168-240 50VQP300

Water Inlet (See Note 7) 2 in. FPT 21/2 in. FPT

Water Outlet (See Note 7) 2 in. FPT 2

/2 in. FPT

Condensate Drain (See Note 8) 1 in. FPT 1 in. FPT

High Voltage Access (See Note 9) 13/8 in. 13/8 in.

Low Voltage Access (See Note 9)

/8 in.

a50-8437

UNIT

50VQP

OVERALL

CABINET (cm)

DISCHARGE

CONNECTIONS (cm)

Duct Flange

WATER

CONNECTIONS (cm)

ELECTRICAL

KNOCKOUTS (cm)

RETURN AIR

CONNECTIONS (cm)

(Using Return Air Opening)

DepthBWidthCHeight

Supply

Width

Supply

Depth

FGK1-Water

Inlet

2-Water

Outlet

Condensate

NO1O2P QRSReturn

Depth

Return

Height

168-240 86.4 270.9 200.7 44.5 44.6 45.1 79.4 78.7 7.6 68.6 65.1 78.1 96.4 87.8 2.5 7.6 121.9 82.2 113.3 6.9

300 86.4 270.9 200.7 54.4 44.6 45.1 59.4 78.7 7.6 68.6 65.1 78.1 96.4 87.8 2.5 7.6 121.9 82.2 113.3 6.9

LEGEND

NOTES:

1. All dimensions in centimeters.

2. Units require 91 cm clearance for water connections, CAP, CSP, MSP, and BSP service access.

3. Overall cabinet height dimension does not include duct flange when in top discharge configuration.

4. Overall cabinet width dimension does not include filter rack and duct flange when on front or back discharge configuration.

5. Side service access must be 91 cm on either side that connections are made. If no connections are made on a side, then service access can be 15 mm minimum.

6. While access to all removable panels is not required, installer should take care to comply with all building codes and allow adequate clearance for future field service.

9. Electrical access is available on either side (left or right) of unit and is also available (left or right) in the front of the unit.

10. Overall depth — add 7.9 cm for 2.5 or 5 cm filter. Add 13 cm for 10 cm filter.

BSP —Blower Service Panel CAP — Control Access Panel CSP — Compressor Service Panel MSP — Motor Service Panel NRP — Non-Removable Panel

REAR RETURN TOP DISCHARGE

FRONT RETURN TOP DISCHARGE

FRONT RETURN REAR DISCHARGE

Control Box

CSP

NRP

CAP

MSP

NRP

RETURN AIR

AIR OUT

BSP

NRP

19.3

NOTE 5

Control Box

CSP+MSP

NRP

RETURN AIR

AIR OUT

CSP+CAP

19.3

BSP

4 5 4

NRP

Control Box

CSP+MSP

NRP

RETURN AIR

AIR OUT

CSP+CAP

BSP

4 5 4

NRP

Control Box

CSP

NRP

CAP

MSP

NRP

AIR OUT

NRP

4.3

4 5

CSP

REAR RETURN FRONT DISCHARGE

RETURN

AIR

RETURN

AIR

BSP

Side Service Access

(See Note)

Service Access

3’ (91 cm)

Front and Back

(All Configurations)

ALL CONFIGURATIONS REQUIRE SERVICE ACCESS AREA SHOWN BELOW

PROTECTION — Once the units are properly positioned on

Fig. 4 — Remove Panels

BLOWER ACCESS

PANEL

C-BOX/

MOTOR ACCESS

PANEL

COMPRESSOR

ACCESS PANEL

a50-8466

Fig. 5 — Remove Blockoff Air Handler and Belt

BLOCKOFF

AIR HANDLER

a50-8467

Fig. 6 — Remove Bolts from

Blower Panel and Sides

STEP 3

a50-8468

the jobsite, they must be covered with either a shipping carton, vinyl film, or an equivalent protective covering. Open ends of pipes stored on the jobsite must be capped. This precaution is especially important in areas where painting, plastering, or spraying of fireproof material, etc. is not yet complete. Foreign material that is allowed to accumulate 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 pressor support plate (two bolts on each side) to maximize vibration and sound alternation.

/4 in. (6 mm) shipping bolts from com-

• ALLOW enough space for service personnel to perform maintenance.

• Provisions must be made for return air to freely enter the space if unit needs to be installed in a confined area such as a closet.

Step 4 — Mount the Unit — Vertical units are avail-

able in rear or front return air configurations. DISCHARGE CONFIGURATION CONVERSION — To

change the discharge configuration of the unit from top discharge to straight (right or left) discharge, follow the procedure below. To change the discharge configuration of the unit from straight (right or left) discharge to top discharge, reverse the procedure below.

1. Remove the 3 panels as shown in Fig. 4.

2. Remove blockoff air handler. Loosen belt and remove. See. Fig. 5.

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.

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

4.4 C and 37.8 C and relative humidity is no greater than 75%.

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

NOTE: Water inlets/outlets and high/low voltage electrical access are available on either side of the unit. Electrical access is also available on the unit front. See Fig. 2 and 3.

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

NOTE: Unit has full filter frame bottom access for 25, 51, or 102 mm filters.

3. Remove 4 bolts from blower panel. Remove 4 bolts (2 bolts on each side) from blower sides. See Fig. 6.

4. Remove 4 bolts and take blower glides out. See Fig. 7.

Fig. 7 — Remove Bolts and Blower Glides

BLOWER GLIDES

(2X)

a50-8469

Fig. 8 — Attach Blower Glides

a50-8470

Fig. 9 — Pull Blower Assembly to Glides

a50-8471

Fig. 10 — Rotate Blower Assembly

a50-8472

Fig. 11 — Push in Blower Assembly

a50-8473

Fig. 12 — Attach Blower Asembly

a50-8474

Fig. 13 — Remove Blower Glides and Reattach

STEP 10

a50-8475

8. When the blower assembly is parallel to the floor, push the blower assembly back so the blower panel is flush with the unit. See. Fig. 11.

5. Attach blower glides to blower bottom load brackets as shown in Fig. 8. Use bottom set of holes on blower bottom load brackets. The blower shaft should be sitting directly on top of the blower glides.

6. Stand in front and pull the blower assembly on to the ridge of the blower glides. See Fig. 9.

9. Attach blower assembly with 4 bolts as shown in Fig. 12.

10. Remove the 2 blower glides and reattach back into compressor section. See Fig. 13.

7. Rotate blower assembly using the blower glides as a guiding track. See Fig. 10.

11. Use four

/4 in. (6 mm) 20 UNC bolts (2 bolts on each side) to bolt blower assembly to blower bottom load brackets. Reattach belt and tighten. See Fig. 14.

12. Reattach blockoff air handler as shown in Fig. 15.

Fig. 15 — Reattach Blockoff Air Handler

BLOCKOFF AIR HANDLER

a50-8477

Fig. 16 — Replace Panels

BLOWER FILLER

PANEL

C-BOX/MOTOR ACCESS

PANEL

COMPRESSOR

PANEL ACCESS

a50-8478

Fig. 17 — Remove Access Panels

FRONT C-BOX/

MOTOR ACCESS

PANEL

COMPRESSOR

ACCESS PANEL

BACK COMPRESSOR/

C-BOX/ MOTOR ACCESS

PANEL

RETURN

AIR

CONTROL BOX

a50-8479

Fig. 18 — Remove Motor and Control Box Covers

MOTOR COVER

CONTROL BOX COVER

a50-8480

Fig. 19 — Flip Control Box

a50-8481

Fig. 14 — Bolt Blower Assembly to Load Brackets

a50-8476

1. Mount the unit so that the return-air inlet is 90 degrees to the return-air grille. Install a sound baffle to reduce lineof-sight sound transmitted through return-air grilles.

2. Mount the unit on a rubber or neoprene pad to minimize vibration transmission to the building structure. Extend the pad beyond all four edges of the unit.

NOTE: Some codes require the use of a secondary drain pan under vertical units. Check local codes for more information.

CONTROL BOX/MOTOR ACCESS CONFIGURATION CONVERSION — To change the configuration of the control box/motor access from the front of the unit to the back of the unit, follow the procedure below. To change the configuration of the control box/motor access from the back of the unit to the front of the unit, reverse the procedure below.

1. Remove the 3 panels as shown in Fig. 17.

13. Put 3 panels back onto unit. See Fig. 16.

Sound minimization is achieved by enclosing the unit within a small mechanical room or a closet. The following are additional measures for sound control.

2. Remove motor cover and control box cover as shown in Fig. 18.

3. Remove 4 screws from control box. Using the guide rails as a guide, flip the control box down, slide the box across, and then flip the box up as shown in Fig. 19. Reattach the control box with screws.

SCREWS

RIGHT SIDE VIEW

4. Loosen belt tension and take belt off. See Fig. 20.

Fig. 20 — Remove Belt and Bolt-Belt Adjustment

Assembly

STEP 5

STEP 4

BOLT-BELT ADJUSTMENT ASM

a50-8482

Fig. 21 — Move Bolt-Belt Adjustment Assembly

STEP 6

a50-8483

Fig. 22 — Replace Belt and Motor and

Control Box Covers

a50-8484

Fig. 23 — Replace Access Panels

FRONT RETURN TOP DISCHARGE

CONTROL BOX

a50-8485

5. Remove bolt-belt adjustment assembly. See Fig. 20.

8. Put 3 panels back onto unit. See Fig. 23.

6. Move bolt-belt adjustment assembly to opposite side and reattach. See Fig. 21.

7. Put belt back on and tighten. Put control box cover and motor cover on return side. See Fig. 22.

CONTROL BOX COVER

MOTOR COVER

Step 5 — Check Duct System — The duct system

should be sized 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 be also 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,

larger ductwork should be installed.

• Check existing ductwork for leaks and repair as

necessary. NOTE: Local codes may require ventilation air to enter the

space for proper indoor air quality. Hard-duct ventilation may be required for the ventilating air supply. If hard ducted ventilation is not required, be sure that a proper air path is provided for ventilation air to unit to meet ventilation requirement of the space.

Step 6 — Install Condensate Drain — The con-

densate drain can be connected to either side of the unit. The 50VQP units come with a flex hose and 1 in. (25 m) FPT condensate connection tied inside. To install the condensate drain (see Fig. 24.):

1. Untie the flex hose and make interal trap on either the left side or right side of the unit.

2. Internally attach mounting plate with FPT fitting.

Each unit must be installed with its own individual trap,

NOTE: Trap should be deep enough to offset maximum unit static difference.

Fig. 25 — Trap Condensate Drain

*3/4" IPT

Trap Depth

1.5" [38mm]

Min 1.5" [38mm]

1/4" per foot (21mm per m) drain slope

3/4" PVC or Copper by others

Vent

Fig. 24 — Install Condensate Drain

a50-8486

vent and means to flush or blow out the condensate drain line. Do not install units with a common trap or vent. See Fig. 25.

Consider the following:

• Units are typically installed directly above each other on successive floors with condensate drains located near the units.

• Connect the unit condensate drain connection to the building condensate drain with a 1-in. (25 mm) drain line.

• The horizontal run of a condensate hose is usually too short to cause drainage problems, however the horizontal run pitch of the condensate line should be at least 1 cm for every 50 cm of run in the direction of flow. Avoid low points and unpitched piping since dirt collects in low or level areas and may cause stoppage and overflow.

• Install a condensate trap at each unit with the top of the trap positioned below the unit condensate drain connection.

• Design the length of the trap (water-seal) based upon the amount of positive or negative pressure on the drain pan. As a rule, 25 mm of trap is required for each 10 Pa of negative pressure on the unit.

VENTING — A vent should be installed in the condensate line of any application which 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 the Carrier System Design Manual for additional information.

All WSHP units utilize 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:

• A backup wrench must be used 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 2.41 and 3.23 L/m per

kW of cooling capacity. For proper maintenance and servicing, pressure-temperature (P/T) ports are necessary for temperature and flow verification.

In addition to complying with any applicable codes, consid-

er the following for system piping:

• Piping systems utilizing water temperatures below

10.0 C require 13 mm closed cell insulation on all piping surfaces to eliminate condensation.

• All plastic to metal threaded fittings should be avoided due to the potential to leak. Use a flange fitted substitute.

• Teflon tape thread sealant is recommended to minimize internal fouling of the heat exchanger.

• Use backup wrench. Do not overtighten connections.

• Route piping to avoid service access areas to unit.

• The piping system should be flushed prior to operation to remove dirt and foreign materials from the system.

GROUND-LOOP APPLICATIONS — Temperatures between –3.9 and 43.3 C and a cooling capacity of 2.41 to

3.23 L/s per kW are recommended. In addition to comply-

ing with any applicable codes, consider the following for system piping:

• Piping materials should be limited to only polyethylene fusion in the buried sections of the loop.

• Galvanized or steel fittings should not be used at any time due to corrosion.

• All plastic to metal threaded fittings should be avoided due to the potential to leak. Use a flange fitted substitute.

• Do not overtighten connections.

• Route piping to avoid service access areas to unit.

• Pressure-temperature (P/T) plugs should be used to measure flow of pressure drop.

GROUND-WATER APPLICATIONS — Typical groundwater piping is shown in Fig. 26. In addition to complying with any applicable codes, consider the following for system piping:

• Install shut-off valves for servicing.

• Install pressure-temperature plugs to measure flow and temperature.

• Boiler drains and other valves should be connected using a “T” connector to allow acid flushing for the heat exchanger.

• Do not overtighten connections.

• Route piping to avoid service access areas to unit.

• Use PVC SCH80 or copper piping material.

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

Water Supply and Quantity 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 that 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.

— Check water supply. Water

Step 8 — Field Power Supply Wiring

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. 27-30 for a schematic of

the field connections which must be made by the installing (or electrical) contractor. See Tables 3 and 4 for fuses 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 Tables 3 and 4.

Make all final electrical connections with a length of flexi-

ble conduit to minimize vibration and sound transmission to the building.

POWER CONNECTION — Line voltage connection is made by connecting the incoming line voltage wires to the L side of the CC terminal. See Tables 3 and 4 for 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

Example: Supply voltage is 420-3-50.

Determine maximum deviation from average voltage: (AB) 425 – 421 = 4 v

(BC) 422 – 421 = 1 v (AC) 421 – 418 = 3 v

Maximum deviation is 4 v. Determine percent voltage imbalance.

% Voltage Imbalance = 100 x

below the maximum allowable 2%.

imbalance constitutes abuse and may cause damage to electrical components.

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

420-VOLT OPERATION — All 380/420 volt units are factory wired for 380 volts. The transformers may be switched to 420-volt operation (as illustrated on the wiring diagram) by disconnecting the VIO lead at L1 and attaching the BRN lead to L1. Close open end of VIO lead.

max voltage deviation from average voltage

average voltage

AB = 425 volts BC = 422 volts AC = 417 volts

Average Voltage =

421

= 0.95%

This amount of phase imbalance is satisfactory as it is

Operation on improper line voltage or excessive phase

425 + 422 + 417

1264

= 421

Table 2 — Water Quality Guidelines

PressureTemperature Plugs

Boiler Drains

Strainer – Field-Installed Accessory (16 to 20 mesh recommended for filter sediment)

Shut-Off Valve

Water Control Valve

Automatic Balance Valve

Expansion

Tank

Water Out

Water In From Pump

Fig. 26 — Typical Ground-Water Piping Installation

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

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

Iron Fe

(Ferrous)

(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 Potable Water NR — Application Not Recommended SS — Stainless Steel

*Heat exchanger materials considered are copper, cupronickel, 304 SS (stain-

less 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.

LEGEND

MATERIAL*

All N/A

All

All N/A

Copper N/A

Cupronickel N/A <150 ppm NR NR

304 SS N/A <400 ppm <250 ppm <150 ppm 316 SS N/A <1000 ppm <550 ppm <375 ppm

Titanium N/A >1000 ppm >550 ppm >375 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

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.

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

If Fe

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

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

At H

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

50 F (10 C) 75 F (24 C) 100 F (38 C)

<20 ppm NR NR

<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. NOTE: 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.

Fig. 27 — 50VQP084-168 Unit with Complete C Control (Typical)

a50-8438

NOTES:

1. Compressor and blower motor thermally protected internally.

2. All wiring to the unit must comply with NEC (National Electrical Code, U.S.A.) and local codes.

3. 380/420-v transformers will be connected for 380-v operation. For 420-v operation, disconnect

VIO lead at L1, and attach BRN lead to L1. Close open end of VIO lead.

4. FPI jumper provides low temperature protection for WATER. When using ANTIFREEZE solu-

tions, cut JW3 jumper.

5. Typical heat pump 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 dry contact will be avail-

able 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. For dual point power option, blower wires (3 qty) will go to PDB2 only.

AL — Alarm Relay

BC — Blower Contactor

CB — Circuit Breaker

CC — Compressor Contactor

CO — Sensor, Condensate Overflow

DPP — Dual Point Power

DS — Disconnect Switch

FP1 — Sensor, Water Coil Freeze Protection

FP2 — Sensor, Air Coil Freeze Protection

HP — High-Pressure Switch

HPWS — High-Pressure Water Switch

JW3 — Clippable Field Selection Jumper

LOC — Loss of Charge Pressure Switch

MV — Motorized Valve

PDB1 — Power Distribution Block

PDB2 — Power Distribution Block Dual Point Option

RVS — Reversing Valve Solenoid

TRANS — Transformer

Factory Line Voltage Wiring

Factory Low Voltage Wiring

Field Line Voltage Wiring

Field Low Voltage Wiring

Printed Circuit Trace

Optional Wiring

LEGEND

Relay/Contactor Coil

Thermistor

Condensate Pan

Circuit Breaker

Ground

Solenoid Coil

Relay Contacts - N.O.

Relay Contacts - N.C.

Temperature Switch

Switch - Low Pressure

Switch - High Pressure

Wire Nut

Complete C

NOTES:

1. Compressor and blower motor thermally protected internally.

2. All wiring to the unit must comply with NEC (National Electrical Code) and local codes.

3. 380/420-v transformers will be connected for 380-v operation. For 420-v operation, dis-

connect VIO lead at L1, and attach BRN lead to L1. Close open end of VIO lead.

4. FP1 thermistor provides freeze protection for WATER. When using ANTIFREEZE solu-

tion, cut JW3 jumper.

5. Typical heat pump 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 (JW4) jumper and dry con-

tact 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. For dual point power option, blower wires (3 qty) will go to PDB2 only.

AL — Alarm Relay

BC — Blower Contactor

CB — Circuit Breaker

CC — Compressor Contactor

CO — Sensor, Condensate Overflow

DPP — Dual Po int Power

DS — Disconnect Switch

FP1 — Sensor, Water Coil Freeze Protection

FP2 — Sensor, Air Coil Freeze Protection

HP — High-Pressure Switch

HPWS — High-Pressure Water Switch

JW3 — Clippable Field Selection Jumper

LOC — Loss of Charge Pressure Switch

MV — Motorized Valve

PDB — Power Distribution Block

PDB2 — Power Distribution Block Dual Point Option

RVS — Reversing Valve Solenoid

TRANS — Transformer

Factory Line Voltage Wiring

Factory Low Voltage Wiring

Field Line Voltage Wiring

Field Low Voltage Wiring

Printed Circuit Trace

Optional Wiring

LEGEND

Relay/Contactor Coil

Thermistor

Condensate Pan

Circuit Breaker

Ground

Solenoid Coil

Relay Contacts - N.O.

Relay Contacts - N.C.

Temperature Switch

Switch - Low Pressure

Switch - High Pressure

Wire Nut

Fig. 28 — 50VQP084-168 with Deluxe D Control (Typical)

a50-8439

Deluxe D

AL1

AL2

CMP1

FAN

PWR

HS1/EXH/RVS

PREMIER

LINK

COMPLETE

CONTROL

PWR

S P

S A

CMPSAFE

AL1

CMP1

FAN

PWR

PREMIER

LINK

DELUXE

CONTROL

PWR

CMPSAFE

HS2

HS1

CMP2

O/W2

S P T

S A

LEGEND

NOTE: Reversing valve is on in Cooling mode.

CR — Control Relay LWT — Leaving Water Temperature Sensor SAT — Supply Air Temperature Sensor SPT — Space Temperature Sensor

Fig. 30 — PremierLink Controller Applications with Deluxe D Control

LEGEND

NOTE: Reversing valve is on in Cooling mode.

LWT — Leaving Water Temperature Sensor SAT — Supply Air Temperature Sensor SPT — Space Temperature Sensor

Fig. 29 — PremierLink™ Controller Applications with Complete C Control

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