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Carrier 38QR018C-060C Installation, Start-Up And Service Instructions Manual

Commercial heat pumps
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Installation, Start-Up and Service
CONTENTS
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . 1
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
• UNPACK UNIT
• INSPECT SHIPMENT
• CONSIDER SYSTEM REQUIREMENTS
Step 2 - Rig and Mount Unit . . . . . . . . . . . . . . . . 4
Piping Connections . . . . . . . . . . . . . . . . . . . . . . . . 4,5
• MAKE PIPING SWEAT CONNECTIONS
• PROVIDE SAFETY RELIEF
START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6,7
Preliminary Checks . . . . . . . . . . . . . . . . . . . . . . . . 6
Leak Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Evacuate and Dehydrate . . . . . . . . . . . . . . . . . . . . 6
Charge System . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
To Start Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-11
MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . 12,13

SAFETY CONSIDERATIONS

Installing and servicing air conditioning equipment can
be hazardous due to system pressure and electrical compo-
nents. Only trained and qualified service personnel should
install or service air conditioning equipment.
Untrained personnel can perform basic maintenance, such
as cleaning and replacing filters. All other operations should
be performed by trained service personnel. When working
on air conditioning equipment, observe safety precautions in
literature, tags, and labels attached to unit.
Follow all safety codes. Wear safety glasses and work gloves.
Use quenching cloth for brazing operations. Have fire ex-
tinguisher available. Read these instructions thoroughly. Con-
sult local building codes and National Electrical Code (NEC)
for special installation requirements.
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Book 1 4
PC 111
Tab
5a 5a
Instructions
Page
Catalog No. 563-882
Printed in U.S.A.
38QR018C-060C
Commercial Heat Pumps
Before installing or servicing system, always turn off
main power to system. There may be more than one dis-
connect switch. Turn off accessory heater power if ap-
plicable. Electrical shock can cause personal injury.

INSTALLATION

Step 1 - Complete Pre-Installation Checks

UNPACK UNIT (see Fig. 1.) - Move unit to final location.
Remove carton from unit, being careful not to damage serv-
ice valves and grilles.
Fig. 1 - Model 38QR018C-060C
INSPECT SHIPMENT - File claim with shipping com-
pany if shipment is damaged or incomplete.
CONSIDER SYSTEM REQUIREMENTS - Consult
local building codes and NEC for special installation
requirements.
Allow sufficient space for airflow clearance, wiring, re-
frigerant piping, and servicing unit. See Fig. 2 and 3.
Locate unit so that airflow is unrestricted on both sides.
Refer to Fig. 2 and 3.
Unit may be mounted on a level pad directly on base legs
or mounted on raised pads at support points. See Fig. 2 and
3 for center of gravity.
Form 38QRC-1SI
H E AT P U
M P
Pg 1
3-92
Replaces: New

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Summary of Contents for Carrier 38QR018C-060C

  • Page 1: Table Of Contents

    TROUBLESHOOTING ....12,13 SAFETY CONSIDERATIONS Fig. 1 — Model 38QR018C-060C Installing and servicing air conditioning equipment can INSPECT SHIPMENT — File claim with shipping com- be hazardous due to system pressure and electrical compo- pany if shipment is damaged or incomplete.
  • Page 2 NOTES: DIMENSIONS — in. (mm) WEIGHT — 1. Dimensions in [ ] are in millimeters. UNIT LB (KG) ‘‘A’’ ‘‘B’’ ‘‘C’’ 2. Airflow 38QR018C 154 (70) ⁄ 3. Center of gravity (15.88) 38QR024C 167 (76) ⁄ 4. Footprint 018C-036C: 3.7 sq ft (.34 m (329) (9.53) 38QR030C...
  • Page 3 NOTES: WEIGHT — DIMENSIONS — in. (mm) 1. Dimensions in [ ] are in millimeters. UNIT LB (KG) ‘‘A’’ ‘‘B’’ ‘‘C’’ 2. Airflow ⁄ ⁄ ⁄ 38QR036C 249 (113) 3. Center of gravity (28.97) (22.22) (9.53) 4. Footprint 048C,060C: 5.3 sq ft (.49 m ⁄...

  • Page 4: Check Accurater® Metering Device

    Fig. 4 — AccuRater® (Bypass Type) Metering De- When more than 50 ft of interconnecting tubing and more vice Components than 30 ft of vertical lift is used, refer to Part 3 of Carrier System Design Manual for design details, or contact your local distributor.

  • Page 5: Install Filter Drier And Moisture Indicator

    If either refrigerant tubing or indoor coil is exposed to at- Pass nitrogen or other inert gas through piping while brazing mospheric conditions for longer than 5 minutes, it must be to prevent formation of copper oxide. evacuated to 1000 microns to eliminate contamination and moisture in the system.

  • Page 6: Step 4 - Make Electrical Connections

    NOTE: Operation of unit on improper line voltage consti- ambient temperature so there will be no demand for cooling. tutes abuse and could affect Carrier warranty. See Table 2. Close field disconnect. The crankcase heater is now Do not install unit in system where voltage may fluctuate energized.

  • Page 7: To Start Unit

    If necessary, refer to Carrier Stand- 3. Start unit and run until suction pressure reaches 5 psig or ard System Techniques Manual, Chapter 2, for complete low-pressure switch opens.
  • Page 8 Whenever the moisture liquid indicator switch. shows presence of moisture, replace the filter drier. Refer to Carrier Standard Service Techniques Manual, Chapter 1, Re- To check pressure switch, attach pressure gage to suction frigerants, for details on servicing filter driers.
  • Page 9 6. Clean piston refrigerant metering hole. Mode, Solenoid Energized) 7. Replace retainer O-ring before reassembling AccuRater control (Carrier O-ring part no. 99CC501052). Defrost Control — The control, which consists of de- frost control board and defrost thermostat, interrupts the nor-...
  • Page 10 1. Shut off all power to unit. 7. Refer to Table 4. Find superheat temperature and suc- tion pressure, and note suction line temperature. If unit 2. Remove all charge from system. has higher suction line temperature than charted tem- 3.

  • Page 11: Maintenance

    Carrier Standard Service Techniques Manual, Chapter 1, coil from the outside to remove dirt. Be sure to flush all page 1-21, for oil recharging procedure. Use Carrier PP33-1, dirt and debris from drain holes in base of unit. Fan mo- Texaco WF-32 or Suniso 3GS oil.

  • Page 12: Troubleshooting

    TROUBLESHOOTING CHART — HEATING CYCLE LEGEND — Normally Closed ODT — Outdoor Thermostat NOTE: For systems with indoor units equipped with microprocessor control, see separate controls, service, and troubleshooting manual.
  • Page 13 TROUBLESHOOTING CHART — COOLING CYCLE LEGEND NC — Normally Closed NOTE: For systems with indoor units equipped with microprocessor control, see separate controls, service, and troubleshooting manual.
  • Page 16 Copyright 1992 Carrier Corporation Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. Book 1 4 PC 111 Catalog No. 563-882 Printed in U.S.A. Form 38QRC-1SI Pg 16 3-92...

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