Movincool Office Pro 10, Service Manual, Page: 51 / 56

TROUBLESHOOTING AND REPAIR
43
PINCH-OFF TOOL
TO GAUGE
MANIFOLD SIDE
CHARGING HOSE
PROCESS TUBE FITTING
TO REFRIGERANT
CYCLE SIDE
PINCH-OFF TUBE
AIR PURGING
BLUE
RED
TO PROCESS TUBE FITTING
CHARGING HOSE (GREEN)
OPEN THE VALVE
OF REFRIGERANT
CYLINDER
REFRIGERANT CYLINDER R-22
LO HI
CLOSED CLOSED
VALVE SETTING
LO HI
OPEN OPEN
LO HI
CLOSED CLOSED
VALVE SETTING
SPECIFIED AMOUNT
OR REFRIGERANT
VALVE OF
REFRIGERANT
CYLINDER
LOW PRESSURE VALVE
HIGH PRESSURE VALVE
PROCESS TUBE FITTING
HIGH PRESSURE
SIDE TUBE
LOW PRESSURE
SIDE TUBE
REFRIGERANT CYLINDER R-22
4 kg/cm 2 G
(57 psiG)
WEIGHT
Removal of Gauge Manifold
Refrigerant Charging Work
Refrigerant Charging Work
29. Refrigerant Charging Work
A. Refrigerant Charging
(1) Remove the charging hose (green) from
the vacuum pump, and connect it to the
refrigerant cylinder (R-22).
(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.
(3) Securely place the refrigerant cylinder on
a scale with a weighing capacity of 70 lbs
(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:
1.61 lbs / .73 kg
If the system cannot be charged with the
specified amount of refrigerant under this
condition, follow the steps below:
(a) Close the high-pressure valve of
manifold.
(b) Operate the refrigerant system.
(c) Slowly open the low-pressure valve
while observing the scale reading.
(d) When the scale reads the specified
amount, immediately close the low-
pressure valve.
(e) Bring the system to a stop.

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.
B. Removal of Gauge Manifold
(1) Crimp the pinch-off tube with a pinch-off
tool.
(2) Remove the gauge manifold and the
process tube fitting. Crush the end of the
pinch-off tube.
(3) Braze the end of the pinch-off tube.
(4) Ensure that a gas leak is not present at
the pinched off portion and the brazed
end.