LG GN-B492Y*C, Service Manual

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