Quantcast Figure 5-4. Evacuation of Refrigerant System

 

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Evacuating The Refrigeration System - TM-5-4120-347-140130
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Figure 5-5. Refrigerant Charging
TM5-4120-347-14
Figure 5-4. Evacuation of Refrigerant System
NOTE
Inability to reach 29 inches of mercury may indicate either a leak or a problem with the pump.
j. Continue running the pump for one more hour, while observing the gage. If the gage needle moves back
and forth, you have a leak which must be located and corrected first.
k.
Close charging manifoid valves.
l.
Close both unit charging valves.
m.
Stop vacuum pump.
n.
Disconnect pump from center hose connection.
o.
Go to paragraph 5-14, charging the refrigeration system.
After the system has been satisfactorily evacuated, it must be fully charged with Refrigerant-22.
Never introduce liquid refrigerant into the low pressure (suction) charging valve.

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