Cycle - LG LBNK3660BL Service Manual

Cycle

1. Installation (Connecting the piping between indoor and outdoor unit)
Indoor unit
Gas cylinder
R22
Purge the air
• Installation
(1) Connect the piping between the indoor and out-
door unit firmly.
– Incorrect connection may cause the leakage and
incomplete vacuuming.
(2) Attach the charging hose (manifold gage) to the
service port.
– Charging hose is necessary to check the pressure
and to inject R22 for leakage test.
– The valve of charging hose must be closed before
being connected.
(3) Inject the 100~300g R22 through the charging hose
opening the valve.
(4) Check the joint part using a gas detector or soapy
water for leakage.
– On checking, the service valve of main service port
must be closed, this test is only for checking whether
pipe connection is ok or not.
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Only for training and service purposes
Liquid side
Gas side
Lo
(5) If there is no leakage, discharge R22 in piping com-
(6) After closing the valve of charging hose, discon-
(7) Turn on the vacuum pump until the pressure drops
(8) After vacuuming, disconnect the vacuum pump and
(9) Open the liquid side completely first and then the
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Outdoor unit
pletely into tank for retrieving.
– Complete discharge is needed for vacuuming.
– If leakage is found, please fasten the joint more tight-
ly.
nect the tank and connect the vacuum pump to
charging hose and open the valve again for vacu-
uming.
below 0kg/cm .
2
open the spindle of service port (liquid-side) slight-
ly for 30 sec and then open the spindle of (gas side)
with hexagonal wrench.
gas side fully in order.
LGE Internal Use Only