GE TBG440ANDR, Technician Service Manual

Page: 40 / 141

Page 40
VIII. MAINTENANCE OF ENVIRONMENTAL PROTECTION REFRIGERATOR
xvi. The condition of valve after sealing
the freon (only LV valve is left open)
xvii. The high pressure gauge should be
over 1.0 kgf/cm
2
G and then use the
sealing wrench to seal the filling tube
from this end. Then remove the
compound pressure gauge and seal
the front end of the filling tube.
- When sealing the filling tube
at pressure below 1.0 kgf/
cm
2
G, the air may be sucked
in.
xviii. Run the refrigerator compressor and
push the freon of the filling tube and
compound pressure gauge into the
system.
- When the low pressure gauge
is pointing at 1.0 kgf/cm
2
G,
close LB valve to stop the
compressor.
xxi. Seal the filling tube at the low
pressure side and remove the
compound pressure gauge, then
seal the filling tube.
- Confirm the pressure be over
1.0 kgf/cm 2 G
xx. After running the compressor,
confirm the coldness.
- Confirm the temperature raise
of discharge tube and back
side heat dissipater).
Note :
• HFC-134a of the aforesaid operation
aims to reach high degree of vacuum
and prevent the reverse flow of
vacuum pump oil into the system.
• The repairing tools used for the
service of aforesaid HFC-134a must
be exclusive, and it is prohibited to
substitute with the repairing tools
used for the original CFC-12 service.