Carrier BASE 25HBR Installation Instructions Manual

Carrier BASE 25HBR Installation Instructions Manual

Base series r-22 sizes 18 to 60 1-1/2 to 5 nominal tons

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25HBR
BASEt SERIES R---22 HEAT PUMPS
SIZES 18 TO 60
1---1/2 TO 5 NOMINAL TONS
Fig. 1 --- 25HBR Standard Grille Unit
NOTE: Read the entire instruction manual before starting the
installation.
Installation Instructions
A05341

TABLE OF CONTENTS

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Step 2 - - Install on Solid Pad
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Table of Contents
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Summary of Contents for Carrier BASE 25HBR

  • Page 1: Table Of Contents

    ..... . A05341 Fig. 1 --- 25HBR Standard Grille Unit NOTE: Read the entire instruction manual before starting the installation.
  • Page 2: Safety Considerations

    SAFETY CONSIDERATIONS INSTALLATION RECOMMENDATIONS Improper installation, adjustment, alteration, service, NOTE: In some cases noise in the living area has been traced to maintenance, or use can cause explosion, fire, electrical shock, or gas pulsations from improper installation of equipment. other conditions which may cause death, personal injury, or 1.
  • Page 3: Installation

    STEP 4 —Operating Ambient INSTALLATION STEP 1 —Check Equipment and Job Site The minimum outdoor operating ambient in cooling mode is 55°F, and the maximum outdoor operating ambient in cooling Unpack Unit mode is 125°F. The maximum outdoor operating ambient in Move to final location.
  • Page 4: Step 6 -Check Defrost Thermostat

    STEP 6 —Check Defrost Thermostat 10 O'CLOCK 2 O'CLOCK Check defrost thermostat to ensure it is properly located and securely attached. There is a liquid header with a brass distributor SENSING BULB and feeder tube going into outdoor coil. At the end of the one of the feeder tubes, there is a 3/8 in.
  • Page 5 Outdoor units may be connected to indoor section using Refrigerant Tubing and Sweat Connections accessory tubing package or field- -supplied refrigerant grade Connect vapor tube to fitting on outdoor unit vapor service tubing of correct size and condition. For tubing requirements valves (see Table 2).
  • Page 6 Table 1—Accessory Usage REQUIRED FOR LOW---AMBI- REQUIRED FOR SEA REQUIRED FOR LONG LINE Accessory ENT APPLICATIONS COAST APPLICATIONS APPLICATIONS* (Over 80 ft.) (Below 55 °F) (Within 2 miles) Crankcase Heater Evaporator Freeze Thermostat Winter Start Control Accumulator Compressor Start Assist Capacitor and Relay Motor Master®...
  • Page 7: Step 8 -Make Electrical Connections

    STEP 8 —Make Electrical Connections WARNING ELECTRICAL SHOCK HAZARD Failure to follow this warning could result in personal injury or death. Do not supply power to unit with compressor terminal box cover removed. NOTE: Use copper wire only between disconnect switch and unit.
  • Page 8: Step 9 -Compressor Crankcase Heater

    STEP 11 —Start- -Up Connect Control Wiring Route 24v control wires through control wiring grommet and CAUTION connect leads to control wiring. See Thermostat Installation Instructions for wiring specific unit combinations. (See Fig. 10.) Use No. 18 AWG color- -coded, insulated (35°C minimum) wire. PERSONAL INJURY HAZARD If thermostat is located more than 100 ft from unit, as measured Failure to follow this caution may result in personal...
  • Page 9 Heating HEAT TYPICAL HP THERMOSTAT PUMP FAN COIL On a call for heating, thermostat makes circuits R- -Y and R- -G. Circuit R- -Y energizes contactor, starting outdoor fan motor and compressor. Circuit R- -G energizes indoor blower relay, starting 24 VAC HOT blower motor on high speed.
  • Page 10: Installation 3

    Heating Check Chart Procedure To check system operation during heating cycle, refer to the Heating Check Chart on outdoor unit. This chart indicates whether a correct relationship exists between system operating pressure and air temperature entering indoor and outdoor units. If OUTDOOR FAN RELAY pressure and temperature do not match on chart, system...
  • Page 12 Catalog No: 25HBR- - 2SI Copyright 2006 Carrier Corp. S 7310 W. Morris St. S Indianapolis, IN 46231 Printed in U.S.A. Edition Date: 03/06 Replaces: 25HBR- -1SI Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.

Table of Contents