Section III OPERATION UNDER USUAL CONDITIONS.

TM5-4120-384-14

Section

III

OPERATION UNDER USUAL CONDITIONS.

2-5. ASSEMBLY AND PREPARATION FOR USE.

The 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.

2-6.

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

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 conditions, the

compressor heater will normally "boil" all liquid

refrigerant out within a four hour period.

If the

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.

Turn

the

fresh

air

damper

control

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.

C h e c k to see that the CONTROL CIRCUIT BREAKER and the COMPR

CIRCUIT BKR are in the ON position.

Change 1

2-9