Goodman Mfg RHA**B*D System Startup, Preliminary Charge Adjustment, Final Charge Adjustment

IMPORTANT: Hard start components are required when single-phase reciprocating compressors are used with indoor coils which have thermal expansion valves. Some units have hard start components factory installed. See the “Specification Sheet” for hard start component require- ments.

System Startup

PRELIMINARY CHARGE ADJUSTMENT

CAUTION

If this unit has a crankcase heater (see Specification Sheet or wiring diagram) con- nect electrical power to the unit for four hours before operating the compressor. Failure to do so could result in compressor damage.

IMPORTANT: If adding refrigerant to a system, add only refrigerant vapor (not liquid) through the suction valve (low side) on the outdoor unit. Any other practice may cause compressor damage.

FINAL CHARGE ADJUSTMENT

Matching System

This final charge adjustment procedure is for the matched combination listed on the specification sheet.

If the outdoor temperature is 60°F or higher, set the room thermostat to COOL, fan switch to AUTO, and set the temperature control well below room temperature.

If the outdoor temperature is below 60°F and you are installing a matching system, set the room thermostat to HEAT, fan switch to AUTO, and set the temperature control well above room temperature.

Measure the low side pressure and temperature from the pressure tap provided. See Figure 4. Measure the high side pressure and temperature from the liquid line service valve.

IMPORTANT!

During all installation and service work, follow all regulations of the Environmental Protection Agency (EPA). This system uses refrigerant R-22. R-22 is an HCFC (HydroChloro-FluoroCarbon). It is a violation of EPA regulations to discharge HCFC into the atmosphere and doing so may result in fines or other penalties.

After completing system piping, leak testing, and electrical connections, use an Allen wrench to carefully open the suction and liquid valves on the unit. These valves do not back seat.

WARNING

To avoid personal injury or death, open each valve only until it touches the retainer. To avoid loss of refrigerant, do not apply pressure to the retainer.

The outdoor unit is factory-charged with enough R-22 for the matching indoor blower coil or matching A-coil plus 25 feet of 3/8” liquid line. For liquid line lengths greater than 25 feet, add 0.55 oz. of R-22 per additional foot up to 50 feet. For line sets over 50 feet consult an Amana distributor. For liquid line lengths less than 25 feet, subtract 0.55 oz. of R- 22 per deviating foot.

CAUTION

Using refrigerant that does not meet ARI Standard 700 may cause compressor dam- age and void the warranty.

	LOW SIDE
LIQUID LINE	GAUGE PORT
	VAPOR LINE
SERVICE VALVE	SERVICE VALVE

Figure 4

Turn the electrical power on, and let the system run for several minutes. It will take some time for the refrigerant pressures to stabilize.

Compare the operating pressures and outdoor unit amp draw to the numbers listed in the outdoor unit “Specifica- tion Sheet”. If pressures and amp draw are too low, add charge. If pressures and amp draw are too high, remove charge.

If you are not using the “Matched Combination” which is listed on the unit "Specification Sheet", check subcooling (TEV coils) or superheat (flowrator coils) as detailed be- low.

AMANA-Approved Mix-Matched System Combinations Use Amana expanded performance multiplier tables in addition to the following procedures.

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