LG S4-S5-SE Chassis, Service Manual

Page: 34 / 44

Evacuation
(All amount of refrigerant leaked)
ï Procedure
(1) Connect the vacuum pump to the center hose
of charge set center hose
(2) Evacuation for approximately one hour.
ñ Confirm that the gauge needle has moved
toward -76 cmHg (vacuum of 4 mmHg or less).
(3) Close the valve (Lo side) on the charge set,
turn off the vacuum pump, and confirm that
the gauge needle does not move (approxima-
tely 5 minutes after turning off the vacuum
pump).
(4) Disconnect the charge hose from the vacuum
pump.
ñ Vacuum pump oil.
If the vacuum pump oil becomes dirty or
depleted, replenish as needed.
Lo
Open
Open
Vacuum pump
3-Way
valve
Outdoor unit
Liquid side
Indoor unit
Gas side
3-Way
valve
CLOSE
OPEN
Use vacuum pump equipped with check value
applied to be prevented from flowing backward.
-34-