LG GR-S552 Service Manual page 15

General Control of Refrigerating Cycle
NO. ITEMS
WELDING
ROD
1
FLUX
2
DRIER
ASM
3
VACUUM
4
DRY AND
AIR
NITROGEN
5
GAS
NIPPLE
6
AND
COUPLER
PIPE
7
CONTENTS AND SPECIFICATIONS
(1) H 30
(1) • Chemical Ingredients
(1) • Ag: 30%, Cu: 27%, Zn: 23%, Cd: 20%
(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
(1) • Ingredients and how to make
(1) ••Borax 30%
(1) ••Borax 35%
(1) • Fluoridation kalium: 35%
(1) • Water: 4%
(1) • Mix the above ingredients and boil until
(1) • they are transformed into liquid.
(1) Assemble the drier within 30min.
(1) after unpacking.
(2) Keep the unpacked drier at the temperature
of 80~100°C.
(1) When measuring with pirant Vacuum
(1 )gauge of charging M/C, vacuum
(1 )degree is within 1 Torr.
(2) If the vacuum degree of the cycle inside is
(2) 10 Torr. below for low pressure and 20 Torr.
(2) for high pressure, it says no vacuum
(2) leakage state.
(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
(3) when substituting dry air for Nitrogen Gas.
(1) Check if gas leaks with soapy water.
(2) Replace Quick Coupler in case of leakage.
(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.
• 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
• check the leakage from
• the Cycle Pipe line part and
• Quick Coupler Connecting part.
2 also
• Check if gas leaks from connecting part of
• Coupler.
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REMARKS
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