Carrier 38YDA- Manuals

Page 2 - Step 2—Install on a Solid, Level Mounting Pad; Unit must be level to within; Step 3—Clearance Requirements; If indoor unit is not equipped with a TXV, use an; Fig. 2—Connecting Tubing Installation; Fig. 4—Accessory Support Feet

panel. It contains information needed to properly install unit.Check rating plate to be sure unit matches job specifications. Step 2—Install on a Solid, Level Mounting Pad If conditions or local codes require the unit be attached to pad, tiedown bolts should be used and fastened through knockoutspro...

Page 3 - Step 7—Make Piping Connections; Fig. 6—Positioning of Sensing Bulb; SENSING BULB; Table 1—Refrigerant Connections and; UNIT

1. Install suction tube adapter. 2. Install liquid flare-to-sweat adapter. 3. Install TXV on liquid flare-to-sweat adapter. 4. Connect external equalizer tube to fitting on suction tube adapter. 5. Position sensing bulb on horizontal portion of suction tube adapter. Secure using supplied hardware. I...

Page 4 - Fig. 7—Line Power Connections; CONTACTOR

Step 8—Make Electrical Connections To avoid personal injury or death, do not supply power to unitwith compressor terminal box cover removed. Be sure field wiring complies with local and national fire, safety,and electrical codes, and voltage to system is within limits shownon unit rating plate. Cont...

Page 5 - Table 2—Wiring Diagram Reference

capacities of compressor high and low speeds. To select recom-mended airflow, refer to Table 3 and the 58UHV,58UXV Instal-lation Instructions. These settings are made on the furnace airflowselector board by moving the appropriate color-coded jumperwires. The ORANGE jumper wire should be set to the H...

Page 13 - WIRING DIAGRAM NOTES:; LEGEND; FIELD SPLICE CONNECTION

WIRING DIAGRAM NOTES: 1. Carrier thermostat wiring diagrams are only accurate for model numbers TSTAT _ _ _ _ _ _ _. 2. Wiring must conform to NEC or local codes. 3. Connect 24-v field wiring to factory-provided stripped leads. 4. Thermostats are factory configured with 5-minute compressor cycle pro...

Page 15 - Step 12—Check Charge; LIQUID

3. Unit is shipped with valve stem(s) front seated and caps installed. Replace stem caps after system is opened to refrig-erant flow (back seated). Replace caps finger tight and tightenadditional 1/12 turn (20 ft-lb torque) with wrench. 4. Close electrical disconnects to energize system. 5. Set room...

Page 17 - Fig. 11—Typical Cooling Balance Points

versus outdoor temperature can be found in the unit Product DataSheet. The cooling load must be taken from structure’s heatgain/loss calculations. The selected temperature is the point atwhich high-speed capacity is needed and is just above thelow-speed balance point. (See Fig. 11.) After temperatur...

Page 18 - Table 10—Compressor PTC Ranges; COMPRESSOR INTERNAL PTC RESISTANCE; Fig. 13—Header Pin Housing Configuration

BALANCE POINT This feature can be used in 2 different options: furnace interface orelectric heat staging. Refer to the Furnace Interface section for itsapplication. If heat pump is installed with a fan coil withmultistages of electric heat, this option can be used to stage thebanks of heat by outdoo...

Page 19 - WINDING; Fig. 14—Resistance Values Versus Temperature; THERMISTOR CURVE

The 2-speed compressor is protected by an internal pressure relief(IPR) which relieves discharge gas into compressor shell whendifferential between suction and discharge pressures exceeds 500psi. The compressor is also protected by 3 PTC devices attached tomotor windings. The PTC resistance is sense...

Page 20 - SERVICE TRAINING; • Unit Familiarization

A94328 SERVICE TRAINING Packaged Service Training programs are an excellent way to increase your knowledge of the equipment discussed in this manual, including: • Unit Familiarization • Maintenance • Installation Overview • Operating Sequence A large selection of product, theory, and skills programs...

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User Manual Carrier 38YDA

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Carrier Manuals