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ARMY TM 9-4210-381-14
NAVY EE-000-CA-MMA-010/7053-AC
AIR FORCE TO 35E9-136-31
WARNING
High voltage is used in operation of this equipment. DEATH ON CONTACT may result if personnel fail to
observe safety precautions.
7.
Connect air conditioner input power at source.
8.
Start air conditioner in COOL mode.
9.
Allow air conditioner to run about 30 minutes.
10.
Check to be sure temperature in suction line has stabilized and thermocouple meter reading remains unchanged
for at least two minutes.
11.
Note pressure on manifold gauge connected to low pressure expansion (primary) service valve. Identify
saturation temperature for pressure gauge reading (see Table 5-2) and compare with thermocouple meter
reading. The thermocouple meter temperature should be 8 to 15°F (4.48 to 8.4°C) higher than saturation
temperature found in Table 5-2.
12.
If the superheat setting is not within limits shown in step 11, adjust expansion valve as follows:
a.
Remove service valve cap (2) from side of power assembly (1).
NOTE
Do not change more than two full turns at one time, then wait five to ten minutes for temperature to
stabilize and recheck pressure and temperature before further adjustment.
b.
Turn adjusting stem two complete turns to change superheat setting by 1 °F. Turn clockwise to increase
superheat span or counterclockwise to decrease superheat span.
c.
If expansion valve can not be adjusted to within limits shown in step 11, contact General Support
Maintenance.
WARNING
Disconnect input power to the air conditioner before performing any internal maintenance. Voltages used
can KILL. Shutting the unit off at the control panel does not disconnect unit power.
13.
Disconnect air conditioner input power at source.
14.
After proper setting is obtained:
a.
Turn unit OFF.
b.
Install service valve cap (2)
c.
Remove thermocouple.
d.
Remove service manifold from service expansion (primary) valve.
e.
Remove wires installed to TB-2 in step 3.
f.
Close left electric plate (para 4-30).
g.
Close manual valve (para 5-39).
FOLLOW ON PROCEDURE
1.
Perform start up after repairs (para 5-22).
2.
Close control box (para 4-45).
3.
Install right front condenser panel (para 4-28).
5-85
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