Refrigerating Cycle - LG GR-M652Y*A Service Manual

General Control of Refrigerating Cycle
NO. ITEMS
WELDING (1) H 30
ROD
(2) Bcup-2
1
FLUX
2
DRIER
(1) Assemble the drier within 30min. after
ASM
unpacking.
3
(2) Keep the unpacked drier at the temperature
of 80~100°C.
VACUUM
(1) When measuring with pirant Vacuum gauge
of charging M/C, vacuum degree is within 1
Torr.
(2) If the vacuum degree of the cycle inside is 10
Torr. below for low pressure and 20 Torr. for
high pressure, it says no vacuum leakage
4
state.
(3) Vacuum degree of vacuum pump must be
0.05 Torr. below after 5 min.
(4) Vacuum degree must be same to the value
described item (2) above for more than 20
min.
(1) The pressure of dry air must be more than
DRY AND
AIR 12~16Kg/cm
5
NITROGEN (2) Temperature must be more than -20~-70°C.
GAS (3) Keep the pressure to 12~6Kg/cm
substituting dry air for Nitrogen Gas.
NIPPLE AND
(1) Check if gas leaks with soapy water.
6
COUPLER
(2) Replace Quick Coupler in case of leakage.
PIPE
7
CONTENTS AND SPECIFICATIONS
Chemical Ingredients
Ag : 30%, Cu : 27%, Zn : 23%, Cd : 20%
Brazing Temperature : 710~840°C
Chemical Ingredients
Cu : About 93%
P : 6.8~7.5%
The rest : within 0.2%
Brazing Temperature : 735~840°C
Ingredients and how to make
Borax 30%
Borax 35%
Fluoridation kalium : 35%
Water : 4%
Mix the above ingredients and boil until
they are transformed into liquid.
2
Put all Joint Pipe in a clean box and
cover tightly with the lid so that dust or
humidity is not inserted.
- 29 -
Recommend H34 containing 34% Ag in the
Service Center.
Make amount for only a day.
Holding period : 1 day
Close the cover of container to prevent dust
putting in the FLUX.
Keep it in a stainless steel container.
Don't keep the drier in a outdoor because
humidity damages to it.
Apply M/C Vacuum Gauge without fail.
Perform vacuum operation until a proper
vacuum degree is built up.
If a proper vacuum degree isn't built up,
check the leakage from the Cycle Pipe line
part and Quick Coupler Connecting part.
2 also when
Check if gas leaks from connecting part of
Coupler.
REMARKS