Repair Section
59
(1) Inspection of the unit before refrigerant recovery
• Inspect the refrigerant system and test for leaks using standard test methods in accordance with
local regulations.
(2) Connection of gauge manifold
1)
Properly remove the crushed end of the pinch-off
tube at the high pressure side of the refrigerant
cycle with a pipe cutter.
2)
Fit the process tube fitting to the pinch-off tube on
high pressure side.
3)
Connect the inlet hose (high pressure side) for
the gauge manifold to the process tube fitting.
< NOTE >
Connect the hoses with care not to mistake the
high pressure side for the low pressure side
and vice versa.
4)
Connect the outlet hose at the center of the
gauge manifold to the vacuum pump.
(3) Evacuation
1)
Open the high pressure valve (Hl) of the gauge
manifold.
2)
Turn on the vacuum pump to start evacuation.
(Evacuate the system to a vacuum of at least 117
Pa.)
3)
When the high pressure gauge indicates a
vacuum of at least 117 Pa, 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
ILL00756-00
High Pressure Valve
(Closed)
High Pressure
Side Tube
Vacuum Pump
(Stopped)
Low Pressure
Valve (Closed)
Inlet Hose
Outlet Hose
Process Tube Fitting
ILL00757-00
LO
Closed
HI
Open
LO
Closed
HI
Closed
Valve Setting
At least 117 Pa
High Pressure Valve
High Pressure Gauge
Gauge
High Pressure
Side Tube
Vacuum Pump
(Operating)
Low Pressure
Valve
