LG S4-S5-SE Chassis, Руководство по обслуживанию

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ï Procedure
(1) Confirm that both the 2-way and 3-way valves
are set to the open position.
ñ Remove the valve stem caps and confirm that
the valve stems are in the raised position.
ñ Be sure to use a hexagonal wrench to operate
the valve stems.
(2) Operate the unit for 10 to 15 minutes.
(3) Stop operation and wait for 3 minutes, then
connect the charge set to the service port of
the 3-way valve.
ñ Connect the charge hose with the push pin to
the service port.
(4) Air purging of the charge hose.
ñ Open the low-pressure valve on the charge set
slightly to air purge from the charge hose.
(5) Set the 2-way valve to the closed position.
(6) Operate the air conditioner at the cooling
cycle and stop it when the gauge indicates
1kg/cm
2 g.
(7) Immediately set the 3-way valve to the closed
position.
ñ Do this quickly so that the gauge ends up indi-
cating 3 to 5kg/cm 2 g.
(8) Disconnect the charge set, and mount the 2-
way and 3-way valveís stem nuts and the ser-
vice port nut.
ñ Use torque wrench to tighten the service port
nut to a torque of 1.8 kg.m.
ñ Be sure to check for gas leakage.
Lo
Closed
Purge the air
Outdoor unit
Indoor unit
Liquid side
Gas side
CLOSE
Open
2-Way
valve
3-Way
valve
CLOSE
Pumping Down
Do not use the existing charge set for R-22.
It is necessary to use new charge set for R-410A.
The pressure of R-410A is 1.6 times higher than
that of R-22. Thus, the high pressure side gauge of
charge set should be used higher pressure gauge
of 50kg/cm2 range.
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