Trane PRGD series Installation, Operation And Maintenance Manual page 15

If the chiller compressor is turned Off, the purge
refrigeration circuit Off cycle is determined by the
purge control. The purge Off-cycle duration is
determined by the pump-out time, which is the greater
of the following two values:
• Daily Pumpout—24 hours (the pump-out time over
the last 24 hours whether the chiller is On or Off)
Figure 5. Adaptive chiller OFF flow chart
The purge will be shut down for a corresponding
period of time, as shown in the following table:
PRGD-SVX01F-EN
S S e e q q u u e e n n c c e e o o f f O O p p e e r r a a t t i i o o n n s s
• Average Daily Pumpout—7 days (the pump-out
time with the chiller On over the last 7 days)
N N o o t t e e : : These two values can be seen on the Tracer ®
AdaptiView ™ display.
Pumpout Time with chiller On or Off
(over the last 24 hours or daily average
over the last 7 days, whichever is
greater)
Pumpout Time ≤ 1 minute
1 minute < Pumpout Time ≤ 3 minutes
3 minutes < Pumpout Time ≤ 5 minutes
Pumpout Time > 5 minutes
Purge Off
cycle
duration
3 days
2 days
1 day
6 hours
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