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OPENING SERVICE VALVES Outdoor units are shipped with a refrigerant charge sealed in the unit. Opening the service valves releases this charge into the system. NOTE: Open the Suction service valve first. If the Liquid service valve is opened first, oil from the compressor may be drawn into the indoor coil TXV, restricting refrigerant flow and affecting operation of the system. Remove Suction service valve cap and insert a hex wrench into the valve stem. Hold the valve body steady with an end-wrench and back out the stem by turning the hex wrench counterclockwise. Turn the stem until it just contacts the rolled lip of the valve body. After the refrigerant charge has bled into the system, open the Liquid service valve. 506 01 5001 00 INSTALLATION INSTRUCTIONS 3-phase R-22 Split System Heat Pump 506 01 5001 00 9 NOTE: These are not back-seating valves. It is not necessary to force the stem tightly against the rolled lip. The service valve cap is a primary seal for the valve and must be properly tightened to prevent leaks. Make sure cap is clean and apply refrigerant oil to threads and sealing surface on inside of cap. Tighten cap finger tight and then tighten additional 6 of a turn (1 wrench flat) to properly seat the sealing surfaces. J. GAUGE PORTS Check for leaks at the schrader ports and tighten valve cores if necessary. Install plastic caps finger tight. ELECTRICAL WIRING ! WARNING ELECTRICAL SHOCK HAZARD Failure to follow this warning could result in personal injury or death. Before installing, modifying or servicing system, turn OFF the main (remote) electrical disconnect device. There may be more than one disconnect device. Refer to unit rating plate for the required supply voltage. Depending on the model, required supply voltage will be: 208/230 V, 3-phase, 60 Hz. or 460 V, 3-phase, 60 Hz. Outdoor units are approved for use with copper conductors only. Do not use aluminum wire. Refer to unit rating plate for minimum circuit ampacity and circuit protection requirements. Grounding Permanently ground unit in accordance with the National Electrical Code and local codes or ordinances. Use a copper conductor of the correct size from the grounding lug in control box to a grounded connection in the service panel or a properly driven and electrically grounded ground rod. Supply Voltage Wiring Connections Make all outdoor electrical supply (Line Voltage) connections with raintight conduit and fittings. Most codes require a disconnect switch outdoors within sight of the unit. Consult local codes for special requirements. Route electrical supply (Line Voltage) wiring through knockout hole in bottom of Control Box. Connect two power wires to Contactor and one power wire to Blue lead wire (use wire nut). Connect ground wire to Ground Lug. Refer to Wiring Diagram on unit and Figure 11. Figure 11 208/230 V and 460 V Electrical Supply (Line Voltage) Connections DISCONNECT PER NEC AND/OR LOCAL CODES CONTACTOR GROUND LUG FIELD GROUND WIRING FIELD POWER WIRING 11 13 L1 L3 L2 BLUE LEAD WIRE Phase Monitor Relay Board The Phase Monitor Board detects the sequence of the three phase electrical system, and a relay breaks the Y (call for cooling) control signal if the phasing is incorrect. Additionally, the board will detect the loss of voltage on any of the three phase inputs and break the Y signal in the same way. An LED on the board displays the following status: Red LED ON - Normal function, relay contact closed. Red LED Blinking - Abnormal function, relay contact open. Red LED OFF - No 24 VAC control power present at board. NOTE: Units with Comfort Alert Diagnostics device have phase monitor feature built in. Figure 12 Phase Monitor Relay Board INSTALLATION INSTRUCTIONS 3-phase R-22 Split System Heat Pump Thermostat Wiring Connections NOTE: Use No. 18 AWG (American Wire Gage) color-coded, insulated (35 °C minimum) wire. If Route thermostat wiring through rubber grommet in thermostat is located more than 100 feet (30.5 m) from bottom of Control Box. Low voltage lead wires are provided in the control box for connection to thermostat unit as measured along the control voltage wires, use No. wires (use wire nuts). Refer to Wiring Diagram on unit and 16 AWG color-coded wires to avoid excessive voltage Figure 13 for low voltage wiring examples. drop. Figure 13 Typical Thermostat (Control Circuit) Connections LEGEND 24-V FACTORY WIRING 24-V FIELD WIRING FIELD SPLICE CONNECTION OUTDOOR THERMOSTAT EMERGENCY HEAT RELAY SUPPLEMENTAL HEAT RELAY SHR EHR C W 2 L G Y E O R C W 2 L G Y E O R ODT EHR ODT ODT REMOVE WIRES FROM CRIMP NUT IN INDOOR FAN COIL WHEN INSTALLING OUTDOOR THERMOSTATS. SYSTEMS WITH ONE OUTDOOR THERMOSTAT G R W 3 C O R G R W 3 C E C W 2 Y W 2 O R C W 2 Y W 2 C L G Y E O R SYSTEMS WITHOUT OUTDOOR THERMOSTATS C G R W 2 C Y O R W 2 SUBBASE THERMOSTAT CONNECTION SPLICE INDOOR CONNECTION SPLICE OUTDOOR BOARD DEFROST SUBBASE THERMOSTAT CONNECTION SPLICE INDOOR CONNECTION SPLICE OUTDOOR BOARD DEFROST SUBBASE THERMOSTAT CONNEC...

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