Carrier 38YCX manual

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Table of contents for the manual

  • Page 1

    38YCX—50 Hz Heat Pump—Outdoor Section Installation and Start-Up Instructions NOTE: Read the entire instruction manual before starting the installation. This symbol → indicates a change since the last issue. SAFETY CONSIDERATIONS Improper installation, adjustment, alteration, service, maintenance, or use can cause explosion, fire, electrical s[...]

  • Page 2

    match, replace indoor coil piston with piston shipped with outdoor unit. The piston shipped with outdoor unit is correct for any approved indoor coil combination. Do not operate unit in the vicinity of toxic or flammable material. Failure to follow this warning can result in personal injury, fire, or death. Remove indoor coil piston if unit is to b[...]

  • Page 3

    To prevent compressor damage DO NOT bury more than 36 in. of refrigerant tubing. If ANY tubing is buried, provide 6 in. vertical rise at service valve. To prevent damage to unit or service valves observe the following: • Use a brazing shield. • Wrap service valves with wet cloth or use a heat sink material. Outdoor units may be connected to ind[...]

  • Page 4

    REFRIGERANT TUBING — Connect tubing to fittings on out- door unit vapor and liquid service valves. (See Fig. 2 and 5.) SWEAT CONNECTION — Use refrigerant grade tubing. Service valves are closed from factory and ready for brazing. After wrapping service valve with a wet cloth, tubing set can be brazed to service valve using either silver bearing[...]

  • Page 5

    Fig. 7 — 24-v Control Circuit Connections A97052 C 1 4 7 C 9 6 3 HEAT PUMP Y O Y O W2 C R FB4ASX FAN COIL EMERGENCY HEAT RELAY W2 W3 E C R G THERMOSTAT W2 L E C R G ODTS2 ODTS1 BLU VIO SYSTEMS WITH TWO OUTDOOR THERMOSTATS A97053 HEAT PUMP E L O O Y Y SYSTEMS WITHOUT OUTDOOR THERMOSTAT FB4ASX FAN COIL W2 W2 W2 C C C R R G THERMOSTAT R G HEAT PUMP [...]

  • Page 6

    Do not vent refrigerant to atmosphere. Recover during system repair or final unit disposal. 1. If equipped with a crankcase heater, energize a minimum of 24 hr before starting unit. To energize heater only, set thermostat OFF and close electrical disconnect to outdoor unit. 2. Fully open liquid and vapor service valves. 3. Unit is shipped with valv[...]

  • Page 7

    If defrost thermostat is in open position, and speedup pins are shorted (with a flat head screwdriver) for 5 sec and released, a short defrost cycle will be observed (actual length is dependent upon the selected Quiet Shift position). When Quiet Shift switch is in ON position, the length of defrost is 1 minute (30 sec compressor off period followed[...]

  • Page 8

    Copyright 2002 CARRIER Corp. • 7310 W. Morris St. • Indianapolis, IN 46231 38ycxc3si Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. Book 1 4 Tab 5a 5a PC 101 Catalog No. 003-880 Printed in U.S.A. Form 38YCX-C3SI Pg 8 2-02 Replaces: 38YCX-C2SI[...]