MovinCool CM25 Service Manual - Manual (Page 82)

Repair Section
82
(1) Connection of gauge manifold
1) Properly remove the crushed end of the pinch-off
tube at the high-pressure side and the low
pressure side of the refrigerant cycle with a pipe
cutter.
2) Fit the process tube fitting to the pinch-off tube on
both sides.
3) Connect the charging hoses (red high-pressure
side) for the gauge manifold to the process tube
fitting.
< NOTE >
Connect the hoses using care not to mistake
the high-pressure side for the low-pressure
side and vice versa.
4) Connect the charging hose (green) at the center
of the gauge manifold to the vacuum pump.
(2) Evacuation
1) Open the high-pressure valve (Hl) of the gauge
manifold.
2) Turn on the vacuum pump to start evacuation.
(Evacuate the system for approximately 15
minutes.)
3) When the high-pressure gauge indicates 30 inHg
(100 kPa) or higher, turn off the vacuum pump
and close the high-pressure valve of the gauge
manifold.
I002183
Pinch-Off Tube
Seal
Charging Hose
Side
Refrigerant
Cycle Side
I000568
High-Pressure Valve
(Closed)
High-Pressure
Side Tube
Vacuum Pump
(When Stopped)
Low-Pressure
Valve (Closed)
Red Hose
Green Hose
Process Tube Fitting
I002227
LO
Closed
HI
Open
LO
Closed
HI
Closed
Valve Setting
30 inHg (100 k Pa) or larger
High-Pressure Valve
High-Pressure Gauge
Gauge
High-Pressure
Side Tube
Vacuum Pump
(in Operation)
Low-Pressure
Valve