GREE ELECTRIC GUHD09NK3CO Service Manual page 146

U-Match Series DC
Inverter Service Manual
3 . D i s c o n n e c t
t h e s u c t i o n a n d
discharge pipes of
the compressor
4 . R e m o v e t h e
compressor away
5. Place the new
compressor on the
base
6 . C o n n e c t t h e
suction/discharge
p i p e s o f t h e
compressor with
the system piping.
7 . C o n n e c t t h e
power cord of the
compressor
8 . E s t a b l i s h
vacuum through
liquid valve
143
a. Dismantle the gas-liquid separator
through heating its inlet/outlet pipe by
the means of gas welding.
b. During the welding, nitrogen should
be inflated and its pressure should be
3
0.5±0.1kgf/cm (relative pressure)
c. Attention should be taken during
the heating to avoid the surrounding
objects burnt due to the high
temperature.
Remove the compressor away from its
base.
a. Put the new compressor in the right
place.
b. Tighten the screws of the compressor
with a wrench
c. Never put the compress upside down
a. Connect the suction/discharge pipes
of the compressor by means of gas
welding.
b. During the welding, nitrogen should
be inflated and its pressure should be
3
0.5±0.1kgf/cm (relative pressure)
c. Attention should be taken during
the heating to avoid the surrounding
o b j e c t s b u r n t d u e t o t h e h i g h
temperature.
a. Connect the power cord as the
r e v e r s e w a y o f d i s c o n n e c t i o n
mentioned above.
b. Tighten the cover of the compressor
with a screw driver.
Establish vacuum inside the system
through liquid valve.