Carrier 38QRF018 Installation Instructions Manual
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Carrier 38QRF018 Installation Instructions Manual

Carrier 38QRF018 Installation Instructions Manual

Duct free heat pumps
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See also: Product Data
38QRF018---036
Duct Free Heat Pumps
Fig. 1 - - 38QRF
NOTE: Read the entire instruction manual before starting the
installation.

TABLE OF CONTENTS

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Installation Instructions

A07532
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14- -15

SAFETY CONSIDERATIONS

Improper installation, adjustment, alteration, service, maintenance,
or use can cause explosion, fire, electrical shock, or other
conditions which may cause death, 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.
Follow all safety codes. Wear safety glasses, protective clothing,
and work gloves. Use quenching cloth for brazing operations.
Have fire extinguisher available. Read these instructions
thoroughly and follow all warnings or cautions included in
literature and attached to the unit. Consult local building codes and
National Electrical Code (NEC) for special requirements.
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. Understand
these signal words; DANGER, WARNING, and CAUTION. These
words are used with the safety- -alert symbol. DANGER identifies
the most serious hazards which will result in severe personal injury
or death. WARNING signifies hazards which 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. NOTE is used to highlight suggestions
which will result in enhanced installation, reliability, or operation.
1
2- -6
!
2
5
ELECTRICAL SHOCK HAZARD
5
Failure to follow this warning could result in personal
injury or death.
6
Before installing, modifying, or servicing system, main
9
electrical disconnect switch must be in the OFF
9
position. There may be more than 1 disconnect switch.
13
Lock out and tag switch with a suitable warning label.
WARNING
! !

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Summary of Contents for Carrier 38QRF018

  • Page 1: Table Of Contents

    38QRF018---036 Duct Free Heat Pumps Installation Instructions SAFETY CONSIDERATIONS Improper installation, adjustment, alteration, service, maintenance, or use can cause explosion, fire, electrical shock, or other conditions which may cause death, personal injury, or property damage. Consult a qualified installer, service agency, or your distributor or branch for information or assistance.

  • Page 2: Installation

    Matching the Heat Pump to an Indoor Unit PERSONAL INJURY AND EQUIPMENT DAMAGE The 38QRF018- -036 unit can be matched with either a 40QNQ HAZARD hi- -wall unit or 40KMQ in- -ceiling cassette unit. The 38QRF035 Failure to follow this caution may result in personal injury unit can only be matched with in- -ceiling cassette indoor units.
  • Page 3 A07883 Fig. 3 - - 38QRF Unit Dimensions...
  • Page 4 Table 1 – 38QRF018- -036 Physical Data UNIT 38QRF NOMINAL CAPACITY Tons OPERATING WEIGHT lb (kg) 166 (75.3) 176 (79.8) 187 (84.8) 221 (100.2) 232 (105.2) REFRIGERANT TYPE Puronr (R --- 410A) BASE UNIT CHARGE lb (kg) 5.5 (2.49) 6.8 (3.08) 10.7 (4.85)

  • Page 5: Rig And Mount Unit

    RIG AND MOUNT UNIT COMPLETE REFRIGERANT PIPING CONNECTIONS Mounting on Ground Outdoor units may be connected to indoor units using Mount unit on a solid, level concrete pad. Position unit so water or field- -supplied tubing of refrigerant grade and condition. See Table ice from roof does not fall directly onto unit.

  • Page 6: Make Electrical Connections

    NOTE: All wiring must conform to NEC and local codes. CAUTION NOTE: Operating unit on improper line voltage constitutes abuse and could affect Carrier warranty. See Table 2. Do not install unit UNIT DAMAGE HAZARD in a system where voltage may fluctuate above or below Failure to follow this caution may result in equipment damage permissible limits.
  • Page 7 A08238 Fig. 7 - - 38QRF018- -060 Typical Wiring Schematic...
  • Page 8 4. Motor RLA values are established in accordance with UL (Underwrit- ers’ Laboratories) Standard 465 (U.S.A. Standard). 5. 38QRF018 ---030 units are only available in single ---phase voltage. 6. Unbalanced 3--- Phase Supply Voltage Never operate a motor where a phase imbalance in supply voltage is greater than 2%.

  • Page 9: Start- -Up

    START- - UP S Manifold sets should be 700 psig high side and 180 psig low side with 550 psig low- -side retard. Preliminary Checks S Use hoses with 700 psig service pressure rating. 1. Check that all internal wiring connections are tight and that S Puron refrigerant, as with other HFCs, is only compatible with all barriers, covers, and panels are in place.
  • Page 10 625 ± 50 psig between suction (low side) and discharge (high side) The crankcase heater is powered by the high- -voltage power of the to allow pressure equalization. unit. It is connected across the line side of the contactor and is thermostatically controlled.
  • Page 11 Reversing Valve gain across valve body. Temperatures are best checked with a remote reading electronic- -type thermometer with multiple probes. In heat pumps, changeover between heating and cooling modes is Figures 9 and 10 show test points on reversing valve for recording accomplished with a valve that reverses flow of refrigerant in the temperatures.

  • Page 13: Maintenance

    MAINTENANCE CLEANING COILS WARNING Coil should be washed out with water or blown out with compressor air. Note that the blow- -thru design causes dirt and ELECTRICAL SHOCK HAZARD debris to build up on the inside of the coils. Clean coil annually or as required by location and outdoor air conditions.

  • Page 14: Troubleshooting

    TROUBLESHOOTING LEGEND — Normally Closed ODT — Outdoor Thermostat NOTE: For systems with indoor units equipped with microprocessor control, see separate controls, service, and troubleshooting manual. A07435 Fig. 11 - - Troubleshooting the Cooling Cycle...
  • Page 15 TROUBLESHOOTING (CONT.) LEGEND — Normally Closed ODT — Outdoor Thermostat NOTE: For systems with indoor units equipped with microprocessor control, see separate controls, service, and troubleshooting manual. A07436 Fig. 12 - - Troubleshooting the Heating Cycle...
  • Page 16 Catalog No:38QRF---4SI Copyright 2008 Carrier Corp. S 7310 W. Morris St. S Indianapolis, IN 46231 Printed in U.S.A. Edition Date: 05/08 Replaces: 38QR--- 3SI Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.

This manual is also suitable for:

38qrf03638qrf018-036

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