MovinCool Office Pro W20 Service Manual - Manual (Page 74)

Repair Section
74
11.4 Refrigerant Charging Work
(1) Refrigerant charging
1) Remove the charging hose (green) from the
vacuum pump, and connect it to the refrigerant
cylinder (R-410A).
2) Loosen the nut on the gauge manifold side of the
charging hose (green). Open the valve of the
charging hose (green). Open the valve of the
refrigerant cylinder. After air purging, tighten this
nut and close the valve of the refrigerant cylinder.
3) Securely place the refrigerant cylinder on a scale
with a weighing capacity of 70 lb (30 kg) that is
graduated by 0.2 oz (5 g).
4) Open the high pressure valve of the gauge
manifold and the valve of the refrigerant cylinder.
Charge the system with refrigerant to the
specified amount.
Standard Amount of Refrigerant:
•1.76 lb (0.8 kg)
CAUTION
The amount of refrigerant charged has a great
effect on the cooling capacity of the unit.
Charge to the specified amount, always
observing the scale graduations while
charging.
5) Close the high pressure valve of the gauge
manifold and the valve of the refrigerant cylinder.
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
I001903
LO
Closed
HI
Open
LO
Closed
HI
Closed
Refrigerant Cylinder R-410A
Valve Setting
Specified Amount
of Refrigerant
High Pressure Valve
High Pressure
Side Tube
Process Tube Fitting
Valve of
Refrigerant
Cylinder
Weight