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Table 1. R-123 refrigerant moisture content as
determined by moisture indicator
75°F
Refrigerant
(23.9°C)
moisture level
Dry
Below 20
Caution
20–50
Wet
Above 50
N N o o t t e e : : Refrigerant moisture content given in parts per million (ppm).
Maintaining the Moisture-
Indicating Sight Glass
In normal operating conditions, the moisture-indicating
sight glass should not require maintenance beyond
keeping the sight glass clean. However, the sight glass
should be replaced after any major repair to the unit
has taken place, or if it is on a unit in which severe
moisture contamination is known to have occurred.
Be aware that it is normal for the sight glass to indicate
the presence of moisture for a period of least 72 hours
after it is installed and after it has been exposed to
atmosphere. Allow a minimum of 72 hours after sight
glass installation or filter-drier service before using the
sight glass to determine the system moisture content.
Removing Air After Servicing the
Chiller
Air that leaks into a chiller during servicing needs to be
removed so that the chiller can operate normally. The
purge pump-out system, which performs this function,
may operate for a long time to remove the air before
cycling off for the first time. This is due to the large
amount of non-condensables and the relatively small
amount of refrigerant being drawn into the purge tank.
PRGD-SVX01F-EN
100°F
125°F
(37.8°C)
(51.7°C)
Below 30
Below 35
30–80
35–100
Above 80
Above 100
I I m m p p o o r r t t a a n n t t : : Do NOT bypass or remove the pump-out
restrictor of the EarthWise ™ purge system.
Doing so could reduce the efficiency of the
purge system. The purge system has a
faster air exhaust rate than previous purge
systems, which makes bypassing or
removing the restrictor unnecessary.
The Daily Pumpout Limit determines how long the
purge pump-out compressor can operate continuously
without generating a Purge Daily Pumpout Exceeded
diagnostic, which will shut off the purge system. You
can disable the Daily Pumpout Limit to allow the purge
to pump out for an extended period of time.
Disable the Daily Pumpout Limit by using the Tracer®
AdaptiView™ display as follows:
1. Touch the S S e e t t t t i i n n g g s s button to access the S S e e t t t t i i n n g g s s
menu screen.
2. Touch the P P u u r r g g e e S S e e t t t t i i n n g g s s button to access the
P P u u r r g g e e S S e e t t t t i i n n g g s s screen.
3. Touch the P P u u r r g g e e D D i i s s a a b b l l e e 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
button. A screen with the current value and a
keypad appears. Use the keypad to enter a new
value. Any setting greater than 0 hours will
effectively disable the Daily Pumpout Limit for the
amount of time selected. The range of available
settings is from 1 to 72 hours in one-hour
increments. Typically, 24 hours is sufficient. After
the selected time has expired, the Disable Daily
Pumpout Limit automatically de-energizes and
returns the purge system to normal operation.
After the level of non-condensables present in the
chiller falls to a point in which an increasing amount of
refrigerant enters the purge tank, the pump-out
compressor begins to cycle on and off. As the
refrigerant in the system becomes less contaminated
with non-condensables, purge pump-out is activated
less frequently.
N N o o t t e e : : If large amounts of non-condensables are
present in the chiller, the air removal rate can be
enhanced by operating the chiller at part-load
conditions.
M M a a i i n n t t e e n n a a n n c c e e
27
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