Goodman Mfg IO-402G Overcurrent Protection, Three Phase Compressor Rotation, System Start Up

Local codes often require a disconnect switch located near the unit; do not install the switch on the unit. Refer to the installa- tion instructions supplied with the indoor furnace/air handler for specific wiring connections and indoor unit configuration. Like- wise, consult the instructions packaged with the thermostat for mounting and location information.

Overcurrent Protection

The following overcurrent protection devices are approved for use.

•Time delay fuses

•HACR type circuit breakers

These devices have sufficient time delay to permit the motor- compressor to start and accelerate its load.

Three Phase Compressor Rotation

CAUTION

Use care when handling scroll compressors. Dome temp- eratures could be hot.

Three phase compressors are power phase dependent and can rotate in either direction.

Verify proper rotation for three phase compressors by ensuring the suction pressure drops and discharge pressure rises when the compressor is energized. NOTE: When operated in re- verse, a three phase scroll compressors is noisier and its cur- rent draw substantially reduced compared to marked values.

To correct, disconnect power and switch any two leads at the unit contactor and re-observe.

High Voltage Connections

Route power supply and ground wires through the high voltage port and terminate in accordance with the wiring diagram pro- vided inside the control panel cover.

Low Voltage Connections

Condensing unit control wiring requires 24 Volt minimum, 25VA service from the indoor transformer. Route control wires through the low voltage port and terminate in accordance with the wir- ing diagram provided inside the control panel cover.

Single-Stage Thermostat

with Two Low Voltage Wires to Remote

System Start Up

CAUTION

POSSIBLE REFRIGERANT LEAK

To avoid a possible refrigerant leak, open the service valves until the top of the stem is 1/8” from the retainer.

When opening valves with retainers, open each valve only until the top of the stem is 1/8” from the retainer. To avoid loss of refrigerant, DO NOT apply pressure to the retainer. When open- ing valves without a retainer remove service valve cap and in- sert a hex wrench into the valve stem and back out the stem by turning the hex wrench counterclockwise. Open the valve until it contacts the rolled lip of the valve body.

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 the secondary seal for the valves 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 addi- tional 1/6 of a turn (1 wrench flat), or to the following specifica- tion, to properly seat the sealing surfaces.

1.3/8” valve to 5 - 10 in-lbs

2.5/8” valve to 5 - 20 in-lbs

3.3/4” valve to 5 - 20 in-lbs

4.7/8” valve to 5 - 20 in-lbs

Do not introduce liquid refrigerant from the cylinder into the crankcase of the compressor as this may damage the compressor.

CAUTION

POSSIBLE REFRIGERANT LEAK

To avoid a possible refrigerant leak, open the service valves until the top of the stem is 1/8” from the retainer.

NOTICE

REFRIGERANT MUST BE ADDED TO THE SYSTEM AFTER EVACUATION IS COMPLETE.

WARNING

REFRIGERANT UNDER PRESSURE!

•Do not overcharge system with refrigerant.

•Do not operate unit in a vacuum or at negative pres-

sure.

Failure to follow proper procedures may cause property damage, personal injury or death.

1.Add refrigerant amount for the unit being installed. See unit rating plate for initial charge.

2.Set thermostat to call for cooling. Check indoor and out- door fan operation and allow system to stabilize for 10 minutes for fixed orifices and 20 minutes for expansion valves.

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