MovinCool Office Pro W20 Service Manual - Manual (Page 72)

Repair Section
72
(4) Checking gas leak
1) Remove the charging hose (green) from the
vacuum pump, and connect the hose to the
refrigerant cylinder (R-410A).
2) Loosen the nut on the gauge manifold side of the
charging hose (green).
3) Open the valve of refrigerant cylinder perform air
purging in the charging hose (green). Then
tighten the nut.
4) Open the high pressure valve of the gauge
manifold. Charge the system with refrigerant until
the low pressure gauge indicates 57 psi
(0.39 kPa). After charging is complete, close the
high pressure valve.
5) Open the valve of refrigerant cylinder perform air
purging in the charging hose (green). Then
tighten the nut.
6) Check carefully for gas leaks inside the
refrigeration system using the gas leak tester.
7) Repair any leak.
WARNING
Any repair on a charged system should be
performed by a licensed professional only.
WARNING
Before checking for gas leaks, fully confirm
that there is nothing flammable in the area
to cause an explosion or fire. Contact of
refrigerant with an open fire generates
toxic gas.
I001901
Open The Valve
of Refrigerant
Cylinder
To Process Tube Fitting
Charging Hose
(Green)
Refrigerant Cylinder R-410A
Red
LO
Closed
HI
Closed
Valve Setting
Air Purging
I002228
LO
Closed
HI
Open
LO
Closed
HI
Closed
Refrigerant Cylinder R-410A
Valve Setting
Gauge Reading
57 psi
(390 kPa)
Open High Pressure
Valve
High Pressure
Side Tube
Low Pressure
Valve (Closed)
Process Tube Fitting
Refrigerant
Cylinder
Valve
(Open)