Goodman Mfg IO-402G Installation Clearances, Safe Refrigerant Handling, Rooftop Installations

Installation Clearances

Special consideration must be given to location of the con- densing unit(s) in regard to structures, obstructions, other units, and any/all other factors that may interfere with air circulation. Where possible, the top of the unit should be completely unob- structed; however, if vertical conditions require placement be- neath an obstruction there should be a minimum of 60 inches between the top of the unit and the obstruction(s). The specified dimensions meet requirements for air circulation only. Consult all appropriate regulatory codes prior to deter- mining final clearances.

Another important consideration in selecting a location for the unit(s) is the angle to obstructions. Either side adjacent the valves can be placed toward the structure provided the side away from the structure maintains minimum service clearance. Corner installations are strongly discouraged.

NOT	B	OK!
RECOMMENDED

Safe Refrigerant Handling

While these items will not cover every conceivable situation, they should serve as a useful guide.

WARNING

To avoid possible injury, explosion or death, practice safe handling of refrigerants.

WARNING

Refrigerants are heavier than air. They can "push out" the oxygen in your lungs or in any enclosed space.To avoid possible difficulty in breathing or death:

•Never purge refrigerant into an enclosed room or space. By law, all refrigerants must be reclaimed.

•If an indoor leak is suspected, throughly ventilate the area before beginning work.

•Liquid refrigerant can be very cold. To avoid possible frostbite or blindness, avoid contact and wear gloves and goggles. If liquid refrigerant does contact your skin or eyes, seek medical help immediately.

•Always follow EPA regulations. Never burn refrig- erant, as poisonous gas will be produced.

A

B

AA

C

AA

B	B
	AA
C		OK!
AA	AA	OK!
		OK!OK!

To avoid possible explosion:

• Never apply flame or steam to a refrigerant cylinder.

If you must heat a cylinder for faster charging,

partially immerse it in warm water.

• Never fill a cylinder more than 80% full of liquid re-

frigerant.

• Never add anything other than R-22 to an R-22 cy-

linder . The service equipment used must be listed

or certified for the type of refrigerant used.

A	AA		AA
	C		C
Minimum Airflow Clearance
Model Type		A	B	C	AA
Residential		10"	10"	18"	20"
Light Commercial		12"	12"	18"	24"

This unit can be located at ground floor level or on flat roofs. At ground floor level, the unit must be on a solid, level foundation that will not shift or settle. To reduce the possibility of sound transmission, the foundation slab should not be in contact with or be an integral part of the building foundation. Ensure the foundation is sufficient to support the unit. A concrete slab raised above ground level provides a suitable base.

Rooftop Installations

If it is necessary to install this unit on a roof structure, ensure the roof structure can support the weight and that proper con- sideration is given to the weather-tight integrity of the roof. Since the unit can vibrate during operation, sound vibration transmis- sion should be considered when installing the unit. Vibration absorbing pads or springs can be installed between the con- densing unit legs or frame and the roof mounting assembly to reduce noise vibration.

• Store cylinders in a cool, dry place. Never use a cy-

linder as a platform or a roller.

WARNING

To avoid possible explosion, use only returnable (not disposable) service cylinders when removing refrig- erant from a system.

•Ensure the cylinder is free of damage which could lead to a leak or explosion.

•Ensure the hydrostatic test date does not exceed 5 years.

•Ensure the pressure rating meets or exceeds 400 lbs.

When in doubt, do not use cylinder.

Refrigerant Lines

CAUTION

The compressor mineral oil for R-22 units is susceptible to moisture absorption and could cause compressor failure. Do not leave system open to atmosphere any longer than necessary for installation.

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