Redi Controls Redi-Purge PRG-113-C3, Installation, Operation & Maintenance Manual, Page: 60 / 68

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Locating a leak
Because the purge has the ability to track and record purge activity while the chiller is both
operating and off, it is possible to use this information to narrow the location of a leak to a
particular area of the machine.
Example : If the majority of pumpout activity occurs while the chiller is off (as indicated
by the "Purge 30-day average pumpout time while chiller OFF" log) it can be assumed
the air-leak source is on the "High" side of the chiller. It can further be assumed t hat
when the chiller is running this same leak allows refrigerant to leak out.
Example : In rare cases, air that has leaked into the chiller some -times cannot be
completely removed while the chiller is running. The only way this air can be removed is
to operate the purge after the chiller shuts down. When operated in the “Adaptive”
mode, this is an automatic function of the purge
and is indicated by the "Pumpout Time
during first three hours after shutdown". It is important to distinguish this from ot her
purge activity resulting from air infiltration caused by the chiller being OFF. This
additional information will help diagnose a leak source.
Using the "Interval Log"
The purpose of the "Interval Log" is to provide the chiller operator with a method of tracking
certain time-based service procedures.
Example : The log may be used to flag a particular scheduled maintenance
procedure, such as an oil change or refrigerant analysis.