Cycle - LG LT-E1820CL 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 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.
Copyright ©2008 LG Electronics. Inc. All right reserved.
Liquid side
Gas side
Lo
through the charging hose
2
3-Way
valve
3-Way
valve
(5) If there is no leakage, discharge N
pletely into tank for retrieving.
– Completely discharge is needed for vacuuming.
– If leakage is found, please fasten the joint more tight-
ly.
(6) After closing the valve of charging hose, discon-
nect the tank and connect the vacuum pump to
charging hose and open the valve again for vacu-
uming.
(7) Turn on the vacuum pump until the pressure drops
below 0 kg/cm 2 .
(8) After vacuuming, disconnect the vacuum pump and
open the spindle of service port (liquid-side) slight-
ly for 30 sec and then open the spindle of service
port (gas side) with hexagonal wrench.
(9) Open the liquid side completely first and then the
gas side fully in order.
Only for training and service purposes
Outdoor unit
in piping com-
2