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TM 5-4120-356-14
(4)
Installation.
(a) Refer to figure 4-18 and install anew receiver.
( b ) Perform any further maintenance of refrigerant compnents which
may be required.
( c ) P u r g e t h e refrigerant system in accordance with the procedures
g i v e n in paragraph 4-8.
( d ) C h e c k t h e receiver and the dehydrator for leaks in accordance
w i t h paragraph 4-4c. Repair a n y leaks found in accordance with paragraph 4-4d.
( e ) R e f e r to figure 4-4 and evacuate the refrigerant system.
(f)
R e f e r t o paragraph 4-10 and charge the system with refrigerant.
Expansion Valve
j.
( 1 ) I n s p e ct i o n .
(a) Turn the selector switch to the "OFF" position and disconnect
the air conditioner from the electrical power source.
(b) Remove the condenser fan. (Refer to paragraph 3-15b.)
(c) Inspect the expansion valve, power bult and tubing for obvious
defects. (See figure 4-12.)
( d ) Check the expansion valve for refrigerant leaks in accordance
with paragraph 4-4c. If expansion valve is leaking, refer to step (4) for repair.
(2) Test.
(a) Refer to figure 4-12 and tape the bulb of a the thermometer to the
s u c t i o n line near the expansion valve power bulb.
(b) Refer to figure 4-5 and install a suction pressure gage.
(c) Reinstall the condenser fan in accordance with paragraph 3-15b.
(d) Install and secure all panels on the air conditioner.
(e) Connect the air conditioner to the electrical power source, turn
the selector switch to the "COOL" position, and turn the thermostat control knob
c o u n t e r - c l o c k w i s e to its limit. Operate the unit on "COOL" for approximately 30 min-
utes to stabilize the thermometer reading.
(f) Note the pressure indicated on the suction pressure gage. To this
p r e s s u r e , add 2 psig (0.14 ks/cm2 ) f o r e s t i m a t e d l i n e l o s s .
g) Refer to table 4-2 and convert pressure (gage pressure plus 2
2
psig (0.14 ks/cm ) to the temperature.

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