LG Electronics LA090HPO Way Valve, Pumping Down, Procedure, Air purging of the charge hose

Troubleshooting Guide

3-wayValve

Pumping Down

Indoor unit Liquid side

Open Outdoor unit

3-Way valve

Gas side

Closed

3-Way valve

Lo

CLOSECLOSE

Purge the air

• Procedure

(1)Confirm that both liquid side and gas side valves are set to the open position.

–Remove the valve stem caps and confirm that the valve stems are in the raised position.

–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 Gas side valve.

–Connect the charge hose to the service port.

(4)Air purging of the charge hose.

–Open the low-pressure valve on the charge set slightly to air purge from the charge hose.

(6)Operate the air conditioner in cooling mode and stop it when the gauge indicates 1kg/cm2g.

(7)Immediately set the Gas side valve to the closed position.

–Do this quickly so that the gauge ends up indi- cating 3 to 5kg/cm2g.

(8)Disconnect the charge set, and mount the Liquid side and Gas side valve’s stem nuts and the service port nut.

–Use torque wrench to tighten the service port nut to a torque of 1.8 kg.m.

–Be sure to check for gas leakage.

(5) Set the liquid side valve to the closed position.

56Room Air Conditioner