General Control of Refrigerating Cycle.
NO. ITEMS CONTENTS AND
SPECIFICATIONS
REMARKS
1 WELDING ROD
1. H
3
O
Chemical Ingredients
Ag: 30%, Cu: 27%, Zn: 23%, Cd: 20%
Brazing Temperature: 710~840°C
2. BCuP
2
Chemical Ingredients
Cu: About 93%
P: 6.8 %
Rest: within 0.2%
Brazing Temperature: 735~840°C
1. Recommended H34 containing 34% Ag in the
Service Center.
2 FLUX
Ingredients and Preparation:
Borax 60%
Fluoridation Kalium: 35%
Water: 5%
3 DRIER ASSEMBLY
· Assemble the drier within 30 minutes after unpacking.
· Keep the unpacked drier at the temperature of
80~100°C
2. Don´t store the drier outdoors, because humidity
damages it.
4 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,
indicates no vacuum leakage state.
3. Vacuum degree of vacuum pump must be 0.05 Torr.
below after 5 minutes.
4. Vacuum degree must be the same of the value
described on item (2) above for more than 20 min.
3. Apply M/C Vacuum Gauge withou fail.
4. Perform vacuum operation until a proper vacuum
degree is built up.
5. If a proper vacuum degree is not built up, check the
leakage from the Cycle Pipe line parts and Quick
Coupler Connecting part.
5
DRY AIR AND NITROGEN
GAS
· The pressure of dry air must be more than 12~6Kg/cm
2
.
· Temperature must be more than –20 ~ -70°C.
· Keep the pressure to 12~6Kg/cm
2
also when
substituting dry air for Nitrogen gas.
6 NIPPLE AND COUPLER
1. Check if gas leaks with soapy water.
2. Replace Quick Couple r in case of leakage.
6. Check if gas leaks from connecting part of coupler.
7 PIPE
1. Put all joint pipe in a clean box and cover tightly with the
lid so dust or humidity do not contaminate.
21
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