TM 9-4120-370-14
TO 35E9-229-1
5-11. EVACUATING THE REFRIGERANT SYSTEM - Continued.
Continue running the pump for one more hour, while observing the gage. If the gage needle moves back and
j.
forth, you have a leak which must be located and corrected first.
k.
Close both unit service valves.
l.
Close charging manifold valves.
m. Stop vacuum pump.
n.
Disconnect pump from center hose connection.
5-12. CHARGING THE
REFRIGERATION SYSTEM
Supplies:
After the system has been satisfactorily evacuated, it must be fully charged with refrigerant22. If available. use recycled
refrigerant.
CAUTION
Never introduce liquid refrigerant into the low pressure (suction) service valve.
NOTE
The system must be evacuated before charging. Use only refrigerant22 to charge the
unit.