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improper, shut off power and check motor wiring.
(6) Check operations of controls as follows:
(a) Turn on power.
(b) Place switch # 3 in “VENT” position.
(c) Turn switch # 2 “ON. ” The evaporator
fan and nothing else should run.
(d) Turn switch # 1 counterclockwise as far
as it will go. Place switch # 3 in “COOL” position.
The evaporator fan should still be operating alone.
(e) Turn switch # 1 clockwise. The con-
denser fan and compressor should start. Check the
condenser fan rotation. It should be clockwise when
seen through the rear of the condenser section.
Observe the sight glass. It should be clear and free
of bubbles after a few minutes of operation. If
operation is as indicated, unit is ready for service. If
any
malfunction
is
noted,
consult
the
troubleshooting
section of the manual before
performing above steps.
Section Il. MOVEMENT
2-3. Dismantling for Movement
If the system is to be moved a short distance, it is
necessary only to disconnect the power supply,
remove the interconnecting cables and refrigerant
hoses, dismantle the mounting, and move to new
location.
Caution: Units should be kept vertical at
all times.
In the event that the unit is to be moved a con-
siderable distance, it is advisable to pump down the
refrigerant charge into the receiver in addition to
performing the dismantling operations outlined
above. To accomplish this, proceed as follows:
a. Remove cap from refrigerant valve stem
located on receiver immediately behind con-
denser air intake grille.
b. Turn valve stem clockwise as far as it will go.
c. Turn thermostat to coldest setting and set
switch # 3 on “COOL”.
d. Turn switch # 2 “ON” and observe sight
glass. Bubbles will soon appear. Continue com-
Section II L CONTROLS
2-5. General
This section describes, locates, and illustrates the
TO A NEW WORKSITE
pressor operation until bubbling diminishes and
almost disappears. A slight bit of colorless liquid
refrigerant will be noticed as well as a little oil. Just
before bubbling and liquid refrigerant vanishes
entirely, shut off unit.
e. Proceed with dismantling as outlined for short
distance moving, refer to paragraph 2-3.
f. Crate unit, utilizing base-mounting bolts to
secure sections to base of crate or skid.
g. Pack hoses and cables in crates with unit to
avoid loss.
h. Fill voids in crate with shredded paper or
similar shock absorbing material. Do not use straw
or other material that may clog condenser and
evaporator coils.
i. Include warning tag with shipment indicating
necessity for opening receiver valve.
2-4. Reinstalling After Movement
After movement, follow procedures in paragraph 2-
2 to reinstall the air conditioner.
AND INSTRUMENTS
function and purpose of the various controls and
instrument of the air conditioner; refer to figure 2-
1.
2-2
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