Carrier 50HQ User Manual

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Number One
AirConditioninq
Maker
^^2 Divisiort of
Carrier Corporation
-
i
Carrier Parkway • Syracuse NY 13221
Single-Package
Water-Source Heat Pumps
INDEX
Page
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
.....................
2
Step 3 — Make Piping Connections
......................
3
CONNECT WATER SUPPLY AND
RETURN LINES
INSTALL BALANCING VALVES
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
..................................................................
6
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:
a.
c.
d.
e.
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.
© Carrier Corporation 1981
Form 50HQ.VQ-2SI
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1 2 3 4 5 6 ... 13 14

Summary of Contents

Page 1 - Water-Source Heat Pumps

Number OneAirConditioninqMaker^^2 Divisiort ofCarrier Corporation-iCarrier Parkway • Syracuse NY 13221Single-Package Water-Source Heat PumpsINDEXPageS

Page 2

COMPRESSOR DISCHARGE PRESSURE@SERVICE PORT(PSIG)Fig. 18 — Heating Cycle Operation Check Chart (R-22) — 50HQ,VQ033a2 noISO 200 250 300COMPRESSOR DIS

Page 3

CHARGEMASTER® DEVICE OPERATION —Operate unit 10 minutes before using Charge-master. Ensure unit indoor fan section access panelis in place for proper

Page 4 - Table 3 — Electrical Data

4. Disconnect compressor wiring at compressor terminal box.5. Using a tubing cutter, cut suction and discharge lines at convenient p

Page 5 - Fig. 4 — Water Piping — 50VQ

^ TROUBLESHOOTING CHARTPROBLEMENTIRE UNIT DOES NOT RUNCAUSEBlown fuseBroken or loose wiresVoltage supply lowTransformerThermostatBLOWER OPERATES BU

Page 6 - _iT^YEL —

TROUBLESHOOTING CHART (cont)PROBLEM INSUFFICIENT COOLING OR HEATINGNOISY OPERATIONCAUSEUnit undersizedLoss of conditioned air by leaksThermostatAi

Page 7 - COOLING CYCLE HEATING CYCLE

f. 50HQ units include a'sus'pehsion package for ceiling installation. To attach hanging brackets, install 4 bolts (5 /16 - 18-3/8

Page 8 - (R-22) — 50HQ,VQ014

IMODEL 50HQ OPERwfob)"dimensions (ft-in.)ABCD_E"supply duct conn.(ft-in.) F_ _ GACCESSORY FILTER (1) Size (in.)Table 2'— Installation

Page 9

Table 3 — Electrical DataUNIT MODEL 50HQ,VQV/PH/HZOPERATINGVOLTAGECOMPRESSORFANFLAMINIMUMCIRCUITMAXIMUMFUSEAMPS AMPSMaxMin LRA RLA01437 59 67 12.72001

Page 10 - ISO 200 250 300

iWATER WATERI Supply Air ‘ Return AirFig. 4 — Water Piping — 50VQBALANCING VALVES (2) WITH SHUTOFF50HQ0I4,018,022,027, 033,042pply Air I Return AirFig

Page 11 - Compressor Removal

2. Splice yellow and black power leads from eontrol box to yellow and red motor leads. (Yellow-to- yellow and black-to-red.)CONNECT CONTROL

Page 12

Imeter or continuity tester. If necessary, refer to Carrier Standard Service Techniques Manual, Chapter 2, for complete instructions.HIGH-P

Page 13 - ^ TROUBLESHOOTING CHART

Table 4 — Service DataUNIT 50HQ.VQ014 018022027033 042 048 060080R-22 CHG (Ib-oz)»1-8 1-132-2 2-62-6 2-14 4-35-3 6-8Refrig ControlCapillary TubeFANCen

Page 14 - TROUBLESHOOTING CHART (cont)

Fig. 12 — Heating Cycle Operation Check Chart (R-22) — 50HQ,VQ018Fig. 15 — Cooling Cycle Charging Chart (R-22) — 50HQ,VQ027Fig. 13 — Cooling Cycle Cha

Related models: 50VQ

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