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 TM5-4120-384-14
5-33.
COMPRESSOR.-Continued
When a hermetic motor burns out, the stator winding
decomposes forming carbon, water and acid which
contaminates refrigerant systems.
These contaminates
must be thoroughly removed from the system to prevent
Motor burnout may also
repeated motor failures.
cause damage to the air conditioner electrical
The following clean up procedures must be
system.
followed in any case of compressor motor burnout.
(h)
Perform
removal
procedure
(step
(4),
preceding
page).
(i) Remove the dehydrator (para 5-30).
Do
not
replace with a new dehydrator at this time.
Flush the refrigerant system with refrigerant solvent
(j)
R-114 dichlorotetrafluroethane (National Stock Number 6830-00-782-
6512).
Flushing should be done under a pressure of 8 to 12 psig
( . 5 6 t o . 8 4 k g / c m2 ) , u s i n g a p u m p o f a p p r o x i m a t e l y 1 / 3 h o r s e p o w e r .
The R-114 may be recirculated if run through a 10 micron filter.
Procedures for flushing the system are as follows:
Refer to figure 5-22 and connect the discharge line
of the pump to the tubing at point 1.
Connect the
recovery line to the tubing at point 2.
Leave the
suction line service valve (point 3) closed.
Cap
the tubing at points 4 and 5.
Start the pump and flush the line for
approximately
10 minutes then turn the pump off.
Remove the recovery line from point 2 and cap the
tubing at point 2.
Connect the recovery line to the valve at
point
3
and open the suction line service valve.
Start the pump and flush the line for
approximately
10 minutes, then turn the pump off.
Disconnect
the bypass
valve
plug
P8
from
receptacle
J8.
Energize the bypass solenoid valve by applying
24
volts dc across pins A and B of plug P8.
Start the pump and flush the line
for
approximately
10 minutes, then turn the pump off.
5-78
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