TM 5-4130-234-13&P
Figure 2-2. Fluid Schematic
the reservoir is full, all valves are closed, hoses
b. Filling the Service Unit Reservoir: The service unit
disconnected, and fittings capped.
fluid system is first vented to atmosphere to relieve any
c. Leakage Checking Refrigeration System: The
pressure buildup from any refrigerant left in the fluid
refrigeration system is first pressurized to approximately 15
system. The fluid system is then evacuated to check for
psig with nitrogen. The refrigeration system charge valve
leakage. A bottle of refrigerant is connected to the FILL
is connected to the service unit LOW PRESS gage and the
connection, the valve on the refrigerant bottle is opened,
refrigeration system charge valve is opened. The pressure
the FILL valve is opened, and the VENT/EVAC valve is
indicated on the low pressure gage is monitored for rapid
carefully controlled to allow the reservoir to fill by venting
decay. If pressure decays rapidly, the leak detector,
the pressure buildup in the reservoir to atmosphere. When
furnished with the
2-3
