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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
During the purge refrigeration circuit Off cycle, the time
remaining is displayed as the Time Until Next Purge
Run in the purge report of the Tracer® AdaptiView™
display.
If the controls determine it is necessary to run the
purge while the chiller compressor is Off, the purge will
be started and run until 60 consecutive minutes have
passed without any pump-out of non-condensables.
If the chiller compressor starts before the purge Off
cycle has elapsed, the purge starts and transfers to
Adaptive Mode Procedure—Chiller Compressor On.
"Adaptive Mode Process—Chiller Compressor On," p.
96
includes an illustration of this process.
Submodes
You can view submodes from the Purge Settings
screen. The available purge submodes are:
•
R R e e f f r r i i g g e e r r a a t t i i o o n n C C i i r r c c u u i i t t O O n n . . Appears if the purge
condensing unit/compressor is operating.
•
R R e e f f r r i i g g e e r r a a t t i i o o n n C C i i r r c c u u i i t t I I d d l l e e . . Appears if the purge
condensing unit/compressor is not operating.
•
P P u u m m p p i i n n g g O O u u t t . . Appears if the purge refrigeration
circuit is On and pump-out has been initiated by the
purge unit controls.
•
E E x x h h a a u u s s t t C C i i r r c c u u i i t t C C h h e e c c k k . . Appears if a pump-out has
been initiated by an operator.
•
P P u u m m p p o o u u t t I I n n h h i i b b i i t t e e d d . . Appears if the purge
refrigeration circuit is On but pump-out has been
inhibited by a low condenser saturation
temperature.
CVHH-SVX001G-EN
•
Purge Off
cycle
duration
•
3 days
2 days
1 day
•
6 hours
•
•
Typical Purge Refrigeration Circuit Operating
Cycle
The purge condensing-unit compressor suction
temperature varies with the amount of non-
condensables collected in the purge tank. If the amount
of non-condensables collected in the purge tank limits
the available condensing surface in the tank, the
condensing-unit compressor suction temperature
begins to fall.
The purge controller initiates a pump-out cycle when
the suction temperature reaches the pump-out initiate
value that is calculated within the purge control. During
the pump-out cycle, the small pump-out compressor
pulls any non-condensables from the purge tank and
discharges them through the carbon tank. As the non-
condensables are removed from the purge tank, the
condensing-unit compressor suction temperature
increases. The purge controller monitors the
compressor suction temperature and cycles or stops
the pump-out, depending on the temperature that is
present.
The 1/4 hp air-cooled condensing unit of the
refrigeration system operates effectively when it is in
the operating range shown in the following figure.
S S t t a a r r t t - - u u p p a a n n d d S S h h u u t t - - d d o o w w n n
D D a a i i l l y y P P u u m m p p o o u u t t L L i i m m i i t t D D i i s s a a b b l l e e d d . . Appears if the
purge refrigeration circuit is On but the daily pump-
out limit has been disabled.
R R e e g g e e n n e e r r a a t t i i n n g g . . Appears if the purge carbon system
is in its regeneration mode. Pump-out is not
allowed in this submode.
A A l l a a r r m m – – C C h h e e c c k k D D i i a a g g n n o o s s t t i i c c s s . . Appears if a new
diagnostic occurs.
P P u u r r g g e e D D i i a a g g S S h h u u t t d d o o w w n n . . Appears if the purge
system has shut down in response to a latching
diagnostic.
R R e e g g e e n n D D i i s s a a b b l l e e d d . . Appears if carbon regeneration is
not allowed.
99
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