Trane CVHH - Page 84

Start-up and Shut-down
84 CVHH-SVX001A-EN
The purge then shuts down for a corresponding period of
time, as shown in the following table:
During the purge refrigeration circuit Off cycle, the time
remaining is displayed as Time Until Next Purge Run in the
Log Sheet that you can view from the Tracer AdaptiView
display (refer to
“ Log Sheet,” p. 21).
If the compressor is turned Off during the purge
refrigeration circuit Off cycle, the purge transfers to
Adaptive Mode Procedure—Chiller Compressor Off.
Figure 49, p. 86 illustrates this process.
Figure 48. Adaptive chiller ON flow chart
First chiller power-up.
Purge operates
continuously for 168
hours to collect data.
Chiller On or Off.
Chi ll er an d p ur g e
star t.
Purge runs.
Has purge
run 60
minutes
w it h ou t an y
p ump - o ut?
The purge control reviews
the historical data and
determine the Pumpout
Time with the chiller On
(Pumpout Time from last
2 4 hou r s daily av er age ov er
last 7 days, whichever is
greater.
Yes
No
Turn purge unit Off for
1 hour, then restart.
Turn purge unit Off for
2 hours, then restart.
Turn purge unit Off for
3 hours, then restart.
Turn purge unit Off for
4 hours, then restart.
Is Pumpout
Tim e greater
than 8
minutes?
Is Pumpout
Tim e greater
than 5
minutes?
Is Pumpout
Tim e greater
than
3 minutes?
Is Pumpout
Tim e greater
than
1 minute?
Yes
Yes
Yes
Yes
No
No
No
No
Pum pout Tim e w ith chiller On
( over the last 24 hours or daily average
over the last 7 days, w hichever is greater)
Pu r g e O ff cy cl e
d ur a t io n
Pumpout Time ≤ 1 minute 4 hours
1 m inute < Pumpout Time ≤ 3 minutes 3 hours
3 m inutes < Pumpout Time ≤ 5 minutes 2 hours
5 m inute < Pumpout Time ≤ 8 minutes 1 hour
Pumpout Time > 8 m inutes No Off cycle