LG JBNQ18GB2A1, Owner'S Manual

Page: 28 / 48

7.Air Purging ofthe ConnectingPipes andthe IndoorUnit
21
Indoor unit
Liquid side
Outdoor unit
OPEN CLOSE
V accum pump
Gas side
Closed
Closed
2-way v alve/
3-way v alve
3-way
valv e
Theair whichcontains moistureremaining inthe refriger ationcycle may causea malfunction
onthe compressor.
1.Confir mthat boththe liquidside valv eand thegas sidev alve areset tothe closedposition.
2.After connectingthe piping,chec kthe jointsf orgas leakagewith gasleak detector .
3.Remo ve theser vicepor tn ut,and connectthe gaugemanif oldand thev acuumpump tothe
service port by thecharge hose.
4.V acuumthe indoorunit andthe connectingpipes untilthe pressurein themlo wers tobelo w-
76cmHg.
5.Remo ve thev alve stemn uts, andfully openthe stemsof the2-w ay and3-w ay valv eswith a
hexagon wrench.
6.T ightenthe valv estem nuts ofthe 2-wa yv alve and3-w ay valv e.
7.Disconnect thecharge hoseand fitthe nut tothe service port.
(Tightening torque:1.8kg.m)