TM 9-4120-357-14
WARNING
Hearing protection must be worn when maintenance is performed while air
conditioner is in operation. Failure to heed this warning can result in hearing
loss or injury.
CAUTION
Make sure that the deflector door above the condenser fan is open, and
that the air conditioner cover is rolled up and secured, before operating
the air conditioner in the cool mode.
f.
Operating Check. After the unit is installed, perform the following checks to be sure that it operates properly.
(1) Turn the selector switch (Figure 2-1) to ventilate, and make sure that air is flowing from the evaporator discharge
grille.
(2) Turn the selector switch to cool, and the temperature control thermostat to the full decrease position. The con-
denser fan starts immediately. The compressor fan should operate after a 25 plus or minus 6 second time delay. Visu-
ally check rotation of the condenser fan.
(3) Turn the selector switch to lo heat and the temperature control thermostat to the full increase position. The com-
pressor and the condenser fan should stop, and within 30-40 seconds warm air should be flowing from the evaporator
discharge grille.
(4) While the unit is operating in each mode, listen for rubbing, grating or knocking noise. If such noises are heard,
stop the unit, troubleshoot and correct the problem before continuing operation.
Section II. MOVEMENT TO A NEW WORKSITE'
4-3. Dismantling for movement.
a. Disconnect the main power cable from the receptacle, and screw the captive dust cover onto the receptacle.
b. Disconnect the drain line(s), and replace pipe plugs in drain holes.
c. Disconnect the ground wire.
d. Disconnect air ducts, if prevent, and install evaporator air intake and discharge grilles on unit.
f. Remove hold-down bolts, if used, and remove shimming, weather stripping or packing from space between the wall
and the casing of the air conditioner.
g. If the air conditioner is to be moved over a long distance, or stored for an indefinite period, wrap the unit in water-
proof paper or plastic sheet, and crate it for proper protection.
CAUTION
When lifting the unit with a hoist and sling attached to the lift rings, use a
spreader bar to keep the sling from damaging the casing.
4-4. Reinstallation after movement.
To install the air conditioner in a new location, follow the instructions in paragraph 4-2.
4-2
