Assessments - 3, GPA: 4.3
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Route Ground and Power Wires Remove access panel to gain access to unit wiring. Extend wires from disconnect through power wiring hole provided and into unit control box. Connect Ground and Power Wires Connect ground wire to ground connection in control box for safety. Connect power wiring to contactor as shown in Fig. 7. ! WARNING ELECTRICAL SHOCK HAZARD Failure to follow this warning could result in personal injury or death. The unit cabinet must have an uninterrupted or unbroken ground to minimize personal injury if an electrical fault should occur. The ground may consist of electrical wire or metal conduit when installed in accordance with existing electrical codes. Connect ground wire to ground connection in control box for safety. Connect power wiring to contactor as shown in Fig. 7. DISCONNECT. PER N.E.C. AND/OR. LOCAL CODES CONTACTOR FIELD POWERWIRING3 PHASE ONLY BLUE FIELD GROUND WIRING GROUND LUG A94025 Fig. 7 - --Line Connections A00010 Fig. 8 - --3- --Phase Monitor Control (Applies to 3- --Phase Units Only) Table 3 – 3- --Phase Monitor LED Indicators LED STATUS OFF No call forcompressoroperation FLASHING Reversed phase ON Normal Connect Control Wiring Route 24v control wires through control wiring grommet and connect leads to control wiring. See Thermostat Installation Instructions for wiring specific unit combinations. (See Fig. 9.) Use No. 18 AWG color--coded, insulated (35°C minimum) wire. If thermostat is located more than 100 ft (30.5 m) from unit, as measured along the control voltage wires, use No. 16 AWG color--coded wire to avoid excessive voltage drop. All wiring must be NEC Class 1 and must be separated from incoming power leads. Use furnace transformer, fan coil transformer, or accessory transformer for control power, 24v/40va minimum. NOTE: Use of available 24v accessories may exceed the minimum 40va power requirement. Determine total transformer 4 loading and increase the transformer capacity or split the load with an accessory transformer as required. Final Wiring Check IMPORTANT: Check factory wiring and field wire connections to ensure terminations are secured properly. Check wire routing to ensure wires are not in contact with tubing, sheet metal, etc. CompressorCrankcaseHeater When equipped with a crankcase heater, furnish power to heater a minimum of 24 hr before starting unit. To furnish power to heater only, set thermostat to OFF and close electrical disconnect to outdoor unit. A crankcase heater is required if refrigerant tubing is longer than 80 ft. Refer to the Long Line Guideline- --Residential Split- --System Air Conditioners and Heat Pumps. Install Electrical Accessories Refer to the individual instructions packaged with kits or accessories when installing. Start- --Up CAUTION! PERSONAL INJURY HAZARD Failure to follow this caution may result in personal injury. Wear safety glasses, protective clothing, and gloves when handling refrigerant and observe the following: S Front seating service valves are equipped with Schrader valves. CAUTION! ENVIRONMENTAL HAZARD Failure to follow this caution may result in environmental damage. Federal regulations require that you do not vent refrigerant to the atmosphere. Recover during system repair or final unit disposal. CAUTION! UNIT OPERATION AND SAFETY HAZARD Failure to follow this caution may result in personal injury, equipment damage or improper operation. S Do not overcharge system with refrigerant. S Do not operate unit in a vacuum or at negative pressure. S Do not disable low pressure switch in scroll compressor applications. S Compressor dome temperatures may be hot. Follow these steps to properly start up system: 1. After system is evacuated, fully open liquid and vapor service valves. 2. Unit is shipped with valve stem(s) front seated (closed) and caps installed. Replace stem caps after system is opened to refrigerant flow (back seated). Replace caps finger- --tight and tighten with wrench an additional 1/12 turn. 3. Close electrical disconnects to energize system. 4. Set room thermostat at 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. R 24 VAC COM C 24 VAC HOT R C * W2 HEAT STAGE 2 W2 * E COOL/HEAT Y STAGE 1 W3 * INDOOR FAN G G RVS COOLING O EMERGENCY E * IF AVAILABLE HEAT TYPICAL HEAT HP THERMOSTATFAN COIL PUMP R C W2 Y O LEGEND 24-V FACTORY WIRING 24-V FIELD WIRING ODT FIELD SPLICE CONNECTION OUTDOOR THERMOSTAT EMERGENCY HEAT RELAY SUPPLEMENTAL HEAT RELAY SHR EHR A02325 / A97413 Fig. 9 - --Generic Wiring Diagrams (See Thermostat Installation Instructions for specific unit combinations) Sequence of Operation NOTE: Defrost control board is equipped with 5 minute lockout timer that is initiated upon any interruption of power. Turn on power to indoor and outdoor units. Transformer is energized. Cooling On a call for cooling, thermostat makes circu...
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