Cycle - LG LB-H1860RH Service Manual

Cycle

1. Installation (Connecting the piping between indoor and outdoor unit)
Indoor unit
Gas cylinder
Purge the air
• Installation
(1) Connect the piping between the indoor and
outdoor 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 N for leakage test.
2
– The valve of charging hose must be closed before
being connected.
(3) Inject the 100~300g N
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.
Liquid side
Gas side
Lo
through the charging hose
2
(5) If there is no leakage, discharge N
completely into tank for retrieving.
– Complete discharge is needed for vacuuming.
– If leakage is found, please fasten the joint more
tightly.
(6) After closing the valve of charging hose,
disconnect the tank and connect the vacuum pump
to charging hose and open the valve again for
vacuuming.
(7) Turn on the vacuum pump until the pressure drops
below 0kg/cm
(8) After vacuuming, disconnect the vacuum pump and
open the spindle of service port (liquid-side)
slightly for 30 sec and then open the spindle of
(gas side) with hexagonal wrench.
(9) Open the liquid side completely first and then the
gas side fully in order.
–42–
Outdoor unit
2 .
in piping
2