Carrier 50HQ User Manual

Number One AirConditioninq Maker

^^2 Divisiort of

Carrier Corporation

Carrier Parkway • Syracuse NY 13221

Single-Package

Water-Source Heat Pumps

SAFETY CONSIDERATIONS...................................1

INSTALLATION........................................................1-5

Step 1 — Check Equipment and

Jobsite .......................................................................1

• UNPACKAGE UNIT

• INSPECT EQUIPMENT

• COMPLETE OR CONSIDER THESE SYSTEM REQUIREMENTS

Step 2 — Connect Supply Ductwork Step 3 — Make Piping Connections

• CONNECT WATER SUPPLY AND RETURN LINES

• INSTALL BALANCING VALVES

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

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

Page

2 3

INDEX

Page

• MAKE CONDENSATE DRAIN LINE CONNECTION

Step 4 — Make Electrical Connections... 4

• INSTALL A BRANCH CIRCUIT DISCONNECT PER NEC

• BRING POWER LEADS INTO UNIT

• CONNECT GROUND LEAD TO GROUND LUG IN SPLICE BOX

• SET FAN MOTOR SPEED

• CONNECT CONTROL POWER WIRING

START-UP

SERVICE....................................................................7

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

SAFETY CONSIDERATIONS

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

service air conditioning equipment.

Untrained personnel can perform basic mainten ance functions of cleaning coils and cleaning 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.

Follow all safety codes. Wear safety glasses and*, work gloves. Use quenching cloth for brazing operations. Have fire extinguishers available for all brazing operations.

WARNING: Before performing service or maintenance operaiions on system, turn off main pow'er switch to indoor unit and outdoor unit. Electrical shock could cause personal injury.

INSTALLATION

Step 1 — Check Equipment and Jobsite

UNPACKAGE UNIT — Move to final location.

INSPECT EQUIPMENT — File claim with ship

ping company if shipment is damaged or incomplete.

COMPLETE OR CONSIDER THESE SYSTEM REQUIREMENTS before installation:

Consult local building codes and National Elec trical Code (NEC) for special installation requirements.

Consider type of water source. Ensure there is an adequate supply of water at temperature of 60 F to 90 F with minimum pressure of 20 psig.

Provide sufficient space for water piping, con densate drain, wiring and servicing unit. See Fig. 1. (Units installed in confined areas may have to be removed for major servicing such as compressor or fan motor replacement.)

Provide a minimum 6-in. clearance between return air filter and adjacent wall.

Mount unit on floor or solid platform. (The 50HQ units can be suspended from ceiling. See “f’ below.) To reduce sound transmission, especially when unit is located in a closet or utility room having louvered doors, the follow ing acoustical treatment is recommended: place an isolation pad under unit. Pad must be same size as unit base. Construct a 1-in. fiberglass sound shield in front of unit.

Form 50HQ.VQ-2SI

f. 50HQ units include a'sus'pehsion package for

ceiling installation. To attach hanging brackets, install 4 bolts (5 /16 - 18-3/8 in. Ig) thru bracket into the 4 weld nuts located on bottom of unit. Insert the threaded rod thru rubber grommet, located in hanging bracket, and attach with flat washer and double nut. See Fig. 3.

Step 2 — Connect Supply Ductwork — Supply

air duct flange is shipped inside unit. Remove flange from shipping location and install on unit supply air opening. Connect supply air ductwork to unit supply air duct connection flange. Refer to Fig. 1 and 2 and Table 1 and 2 for connection size and location. If necessary, refer to Carrier System

Design Manual, Part 2, for system air duct design.

^ Table 1 — Installation Data — 50VQ (See Fig. 1.)

MODEL 50VQ OPER WT (lb)

DIMENSIONS (ft-in.)

SUPPLY DUCT CONN.

(ft-in.) F 0-9-7/16

FILTER (1)

Size (in.)

014

A B C D E

G 1-1-3/8

018

240“^

022

260 270

027

1-9-3/16 1-9-3/16 3-2-5/16 0-5-7/8 0-1-3/16

21 X 21

When E-e'dignihg and installing ductwork, consider tfie following:

a. Size duct for 350 to 450 cfm per ton of cooling

capacity. b. Avoid abrupt duct size increases and reductions. c. Use flexible connectors between ductwork and

unit to prevent transmission of vibration. d. Ducts passing thru an unconditioned space must

be insulated and covered with vapor barrier in

accordance with the latest issue of SMACNA

(Sheet Metal and Air Conditioning Contractor’s

National Association) and NESCA (National

Environmental Systems Contractor’s Associa tion) minimum installation standards for resi dential heating and air conditioning systems.

033

290

Replaceable Media

042

320 320

048 060

0-6-13/16

0-10-1/2 1-1-1/16 1-0

350

2-5-3/8

2-3 4-0 0-8

0-5-1/2

1-4

38 X 22

080

380

0-6-1/16

Return Air

Fig. 1 — Dimensions and Connections — 50VQ

Table 2'— Installation Data — 50HQ (See Fig. 2.)

MODEL 50HQ OPERwfob)

"dimensions (ft-in.)

"supply duct conn.

(ft-in.) F

_ _ G

ACCESSORY FILTER (1)

Size (in.)

014

220

A B

018 022 027 033

195 210 220

3-10-1/2 1-10-5/16 1- 5-15/16 0- 3-7/8

11/16

1- 1-3/8

0- 9^-7/16

17 x23

230

042 048

250 300

0- 3-7/8

Replaceable Media

060

325

4- 0

1-11

2- 0

0-2-9/16

0-3-3/16

1-7-7/8

37 X 23

080

360

0-3-1/16

1-0

Fig. 2 — Dimensions and Connections — 50HQ

Step 3 — Make Piping Connections

CONNECT WATER SUPPLY AND RETURN LINES to water inlet and outlet pipe connections shown in Fig. 4 and 5. Use flexible hose for water line to reduce possible vibration and improve unit serviceability. Make sure hoses or pipes are suitable for system water pressure and sized for proper flow rate.

CAUTION; improper heat exchanger water flow due to piping, valving or improper pump operation is hazardous to units.

For water flow and temperature data refer to

Start-Up section, page 6.

CAUTION: Galvanized pipe or fittings are not

recommended for use with these units due to

possible electrolysis.

nut

BRACKET

Fig. 3 — Suspension Kit

Installation — 50HQ

Table 3 — Electrical Data

UNIT MODEL

50HQ,VQ

014 018 022 027 033 042 048 060

033 042 048 060 080

033 042 36 5 048 060 49 0 104 080 69 0 11 4

FLA — Full Load Amps LRA — Locked Rotor Amps RLA — Rated Load Amps

V/PH/HZ

208-230/1/60 253

208-230/3/60 253 187 80 0

460/3/60 508

OPERATING

VOLTAGE

Max

Min LRA RLA

197

187

414

INSTALL BALANCING VALVES (with shutofO in water supply and return lines for water flow adjustment and a means of water shutoff, if neces sary, when servicing unit. When multiple units are connected in parallel, valves permit removal of one unit without interrupting water flow to other units.

MAKE CONDENSATE DRAIN LINE CON NECTION to female pipe connection provided on unit. Fig. 4 and 5. Install a trap in condensate line as close as possible to unit. Trap must be at least 3 in. deep and not higher than the bottom of unit con densate drain opening. Pitch condensate line to open drain or sump. Insulate a condensate drain line located above a living area.

50HQ Units Only — If a secondary drain is re quired, remove plastic cap from secondary drain connection, located in bottom of unit, and connect drain so that discharge is obvious to maintenance personnel.

Step 4 — Make Electrical Connections — Field

wiring must comply with local and national fire, safety and electrical codes. Voltage to unit must be

within the operating voltage range indicated on

nameplate or in Table 3. On 3-phase units, phases

must be balanced within 2%.

Operation of unit on improper line voltage or with excessive phase imbalance constitutes abuse and is not covered by Carrier Warranty.

INSTALL A BRANCH CIRCUIT DISCONNECT

PER NEC of adequate size to handle unit starting current. Locate disconnect within sight of and readily accessible from the unit, per Section 440-14 of National Electrical Code (NEC).

BRING POWER LEADS INTO UNIT — Extend

leads from disconnect per NEC thru hole provided

(Fig. 1 and 2) into line wiring splice box. Fig. 6.

COMPRESSOR

37 5 53 0 65 0 13 3 66 0 88 0 23 3

100 0

94 0 23 9

150 0 35,3

87 0 13 8 2 5

100 0 136 0 20 6

137 0 20 7

30 0 60 35 0 8 2

9 6

134 16 2 27 7

18 5

16 8 3 9 24 9

6.9

FAN

FLA

7 12.7 9

1.5 18 1 30 1 7 22 0 35 2 5 31.6 3 2 34 33 4 60

4.5

3 2 4 5

6 2 32 1 1 1

1 6 10 2 20 12 3 2 6 31 17 4

MINIMUM

CIRCUIT

AMPS AMPS

17.7

37 8

48.6 19 8 30

26 3 30 6

8 9

15 3 25

MAXIMUM

FUSE

CONNECT GROUND LEAD TO GROUND LUG IN SPLICE BOX for safety. Connect power wiring. See Fig. 6. Splice line power leads to yellow and black pigtails on single-phase units or yellow pigtails on 3-phase units. Use wire nuts. Tape each connection.

Unit transformer on 208-230-volt units is factory wired for 230/24-volt operation. For 208/24-volt operation, remove black (230-v) transformer lead from unit contactor and connect red (208-v) lead to contactor. Cap unused transformer lead.

SET FAN MOTOR SPEED — Set fan motor for high-, medium- or low-speed operation as follows:

1. Remove unit fan section access panel.

2. Locate Molex fan speed selector block on fan

housing. Fig. 7. Selector block receptacle 1 is high fan speed, receptacle 2 is medium fan speed and receptacle 3 is low fan speed. Yellow and black fan motor power leads from control box are connected to selector block receptacle C and

1. Yellow lead is common, black lead is speed-

change lead.

3. To change fan motor speed, remove black lead from selector block receptacle and plug it into

desired receptacle. Receptacle 4 is not used.

CAUTION: For proper utiit operation, set unit fan motor speed for air quantity witbin range shown in Table 4.

Set Fan Motor Speed on 460-Volt Units — Twospeed fan motor is factory wired for high-speed oper ation. (Yellow and black power leads from control box are connected to the yellow and black fan motor leads.) Change fan motor to low speed by wiring as follows:

1. Splice the violet and black fan motor leads together.

20 30

50 60

40 40 45 45

15 15 15

WATER WATER

I Supply Air

‘ Return Air

Fig. 4 — Water Piping — 50VQ

BALANCING VALVES (2) WITH SHUTOFF

50HQ0I4,018,022,027, 033,042

pply Air

I Return Air

Fig. 5 — Water Piping — 50HQ

+ 9 hidden pages