OPERATOR'S MAINTENANCE AIR CONDITIONER, HORIZONTAL, COMPACT

TM 9-4120-428-14

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OPERATOR'S MAINTENANCE

AIR CONDITIONER, HORIZONTAL, COMPACT

(NSN 4120-01-502-1319)

OPERATION UNDER USUAL CONDITIONS

ASSEMBLY AND PREPARATION FOR USE

The Model F9000H-4SPFI air conditioner is completely assembled and self-contained as received. No specific operator

preparation for use is required once the unit is in place.

CAUTION

Do not operate the air conditioner immediately after power has been connected. The

compressor can be damaged by liquid refrigerant that may have migrated to it. The

compressor crankcase heater boils the liquid refrigerant out of the compressor. Power

must be connected for at least four hours in moderate climate conditions and at least eight

hours in sub-freezing climate conditions.

OPERATIONAL CHECKS

The air conditioner should be checked for operation in each mode after installation is completed and when it is placed back in

operation after an extended shut down period.

NOTE

The fabric cover must be rolled up when operating in the cooling mode or when the unit

is connected to a NBC filter. The fabric cover may be rolled down and snapped in place

during other modes of operation as appropriate for environmental conditions.

The fresh air damper should be positioned fully closed whenever the fabric cover is rolled

down and secured since outside air cannot be drawn in through the fresh air inlet screen.

STARTING AND OPERATING INSTRUCTIONS FOR COOLING

1. Roll up and tie the fabric cover on the back of the cabinet. Secure it in place with two straps.

FABRIC COVER

STRAPS

2. Individually adjust all louvers in conditioned air supply louver assembly to the fully open (horizontal) position.

3. Use the operating levers to adjust the louvers in both sections of the return air louver assembly to the fully open position.

4. Turn the fresh air damper control to the fully closed (up) position.

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