CDHH-SVX003C-EN
95
• The average daily pump-out time with the chiller On,
over the last 7 days
Figure 66. Adaptive chiller ON flow chart
First chiller power-up.
Purge operates
continuously for 168
hours to collect data.
Chiller On or Off.
Chiller and
purge start.
Purge runs.
No
Has purge
run 60
minutes
without any
pump-out?
Yes
The purge control reviews
the historical data and
determines the Pumpout
Time with the chiller On
(Pumpout Time from last
24 hours daily average
over last 7 days, whichever
is greater.
Is Pumpout
Time greater
than 8
minutes?
No
Yes
Is Pumpout
Time greater
than 5
minutes?
No
Yes
No
Yes
No
Yes
Is Pumpout
Time greater
than 3
minutes?
Is Pumpout
Time greater
than 1
minute?
Turn purge unit Off for
4 hours, then restart.
Turn purge unit Off for
3 hours, then restart.
Turn purge unit Off for
2 hours, then restart.
Turn purge unit Off for
1 hour, then restart.
The purge then shuts down for a corresponding period of
time, as shown in the following table:
Pumpout Time with chiller On
(over the last 24 hours or daily
average over the last 7 days,
whichever is greater)
Purge Off cycle duration
Pumpout Time ≤ 1 minute
4 hours
1 minute < Pumpout Time ≤ 3
minutes
3 hours
3 minutes < Pumpout Time ≤ 5
minutes
2 hours
5 minutes < Pumpout Time ≤ 8
minutes
1 hour
Pumpout Time > 8 minutes No Off cycle
Start-up and Shutdown
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