Carrier 38BYG manual

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Table of contents for the manual

  • Page 1

    38BYC, 38BYG 12 SEER Split System Heat Pump 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[...]

  • Page 2

    INSTALLATION Step 1—Check Equipment and Job Site UNPACK UNIT Move to final location. Remove carton, taking care not to damage unit. INSPECT EQUIPMENT File claim with shipping company prior to installation if shipment is damaged or incomplete. Locate unit rating plate on unit service panel. It contains information needed to properly install unit. [...]

  • Page 3

    If TXV installation is required, remove existing AccuRater® from indoor coil. Refer to Figs. 4 and 5 and install TXV kit as follows: 1. Install suction tube adapter. 2. Install liquid flare-to-sweat adapter. 3. Connect external equalizer tube to fitting on suction tube adapter. 4. Position sensing bulb on horizontal portion of suction tube adapter[...]

  • Page 4

    OUTDOOR UNIT CONNECTED TO FACTORY APPROVED INDOOR UNIT Outdoor unit contains correct system refrigerant charge for opera- tion with indoor unit of same size when connected by 15 ft of field-supplied or factory accessory tubing. Check refrigerant charge for maximum efficiency. REFRIGERANT TUBING Connect tubing to fittings on outdoor unit vapor- and [...]

  • Page 5

    Use furnace transformer, fan coil transformer, or accessory trans- former for control power, 24v/40va minimum. NOTE: Use of available 24v accessories may exceed the mini- mum 40va power requirement. Determine total transformer load- ing and increase the transformer capacity or split the load with an accessory transformer as required. IMPORTANT: Che[...]

  • Page 6

    4. Set room thermostat to desired temperature. Be sure set point is below indoor-ambient temperature. 5. Set room thermostat to HEAT or COOL and fan control to ON or AUTO mode, as desired. Operate unit for 15 minutes. Check system-refrigerant charge. SEQUENCE OF OPERATION NOTE: Defrost-control board may be equipped with 5-minute lockout timer that [...]

  • Page 7

    6. When you hear reversing valve change position, remove screwdriver immediately; otherwise, control will terminate normal 10-minute defrost cycle in approximately 2 sec. NOTE: Length of defrost cycle is dependent upon length of time it takes to remove screwdriver from test pins after reversing valve has shifted. 7. Unit will remain in defrost for [...]

  • Page 8

    NOTE: When charging is necessary during heating season, charge must be weighed in accordance with unit rating plate ± 0.6 oz/ft of 3/8-in. liquid line above or below 15 ft respectively. EXAMPLE: To calculate additional charge required for a 25–ft line set: 25 ft – 15 ft = 10 ft X 0.6 oz/f t=6o zo f additional charge Step 15—Final Checks IMPO[...]