Practical Work For Heavy Repair; Removal Of Residual Refrigerant; Installed With A Scharader Valve By Using The Lokring; Vacuum Process - LG GC-P207 Service Manual

TROUBLE DIAGNOSIS

3-6. Practical Work For Heavy Repair

Item
1. Removal of • You must discharge the residual refrigerant
residual (R600a) in the outdoor.
refrigerant
• For discharging the refrigerant R600a,
break the narrow portion of tube extension
by hand or with a pipe cutter as shown in
Figure.
• Leave if for 30~60min in outside to
stabilize the pressure with ambient.
• Check the pressure by piercing the dryer
part with pierching pliers. If the refrigerant
is not completely discharged, let the
refrigerator alone for more 30min in
outside.
• After the refrigerant is completely
2. Installed with
discharged, repair any defective parts
a Scharader
and replace the dryer. At any case you
valve By
must use the LOKRING for connecting or
using the
replacing any part in the cycle (No Fire,
LOKRING.
No Welding).
• Connect the Schrader valve to pump with
3. Vacuum
the coupler. And then turn the pump on
process
for vacuum state.
• Let the pump run until the low-pressure
gauge indicates the vacuum (gauge
pressure 0, absolute pressure - 1atm or -
760mmHg).
• Recommended vacuum time is 30 min.
• Charge the N
leakage from welding points and the
LOKRING.
• If leakages are found, repair the defects
and repeat the vacuum process.
Precaution
gas in order to check for
2
- 123 -
POINT TO BE
BROKEN
SERVICE TUBE EXTENSION
CHARGE TUBE
EXTENSION
SCHRADER VALVE
(ONE-WAY VALVE)
LORKING
TO THE VACUUM
PUMP
PRESSURE
GAUGE
Utilities
Pipe Cutter
Piercing Pliers
Schrader valve.
LOKRING
Vacuum pump
LOKRING
Nitrogen
cylinder
Portable
Leakage
Detector
Manometer