14
APP-001b
APR 2007
SECTION 6 SERVICE, MAINTENANCE & PARTS
PURGER PUMP OUT PROCEDURE, WITH
AUTO-PURGER ON
1) Close the purge gas gauge valve to the water
bubbler.
2) Close the low-pressure pumped-liquid line shut-off
valve.
3) Close the foul gas line shut-off valve.
4) Close the water bubbler fill line valve.
The purger will pump down in several hours. To accelerate
the process, attach ammonia hoses to the oil drain valves
and pump out into a suction line. Close the low-pressure
liquid return line and the suction line to isolate the purger.
With electricity on, the pressure in the purger, as indicated
by both the high side pressure gauge and the low side
pressure gauge, should remain at zero. This process
should be completed only by knowledgeable refrigeration
technicians.
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