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WARNING
To DiSCHARGE SYSTEM:
REMOVE LOW PRESSURE CHARGING
VALVE CAP. ATTACH A SUITABLE
HOSE 10 CHARGING VALVE AND DISCHARGE
REFRIGERANT lNTO A SAFE AREA.
NOTE: TO PREVENT EXCESS LOSS OF OIL
DISCHARGE SYSTEM SLOWLY OVER
A PERIOD OF TWO HOURS
TO PURGE SYSTEM:
REMOVE HIGH PRESSURE CHARGING
VALVE CAP. CONNECT VALVE TO A
CYLINDER OF DRY NITROGEN. ATTACH-
A SUITABLE DISCHARGE HOSE TO LOW
PRESSURE CHARGING VALVE OPEN.
NITROGEN VALVE AND ALLOW NITROGEN
TO FLOW THROUGH SYSTEM UNTIL ALL
MOISTURE IS FORCED OUT. CLOSE NITROGEN
CYLINDER VALVE. CONNECT A VACUUM
PUMP TO HIGH AND LOW PRESSURE -
CHARGING VALVES AND HOLD A 29.0 HG
VACUUM FOR 8 HOURS.
Figure 6-1. Disrharging and purging refrigerant system,
6-2
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