Section III. OPERATION UNDER USUAL CONDITIONS.

TM5-4120-383-14

OPERATION UNDER USUAL CONDITIONS.

Section III

2-5.

ASSEMBLY AND PREPARATION FOR USE.

The Model F9000H-3S Air Conditioner is a completely assembled,

self-contained unit as received. No specific operator preparation

for use is required once the unit is in place.

OPERATIONAL CHECKS.

(See fig. 2-1 and 2-2.)

The air conditioner should be checked for operation in all modes

after installation is completed and when it is to be placed back in

operation after an extended shut down period.

Do not perform the operational check in COOL mode

until input power has been supplied to the unit for

at least four hours. Liquid refrigerant tends to

migrate into the compressor crankcase and cylinders

during periods when the compressor heater is not

operating. Under moderate climatic conditional the

compressor heater will normally "boil" all liquid

If the

refrigerant out within a four hour period.

air conditioner has been exposed to below freezing

temperatures without input power, an eight hour warm

up period is recommended.

Unsnap and roll up the fabric cover on the back of the

cabinet.

Secure it in the stowed position with the two straps.

Individually adjust all louvers in conditioned air supply

louver assembly to the fully open (horizontal) position.

Using the operating levers, adjust the louvers in both

sections of the return air louver assembly to the fully open

position.

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

position.

Check that the unit is connected to the proper power source

and that power has been connected to the unit for four hours.

f. Check to see that the CONTROL CIRCUIT BREAKER and the COMPR

CIRCUIT BKR are in the ON position.

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