58
SERVICE TIPS
Purging after Internal Chiller Repairs or Servicing
The following procedures MUST be performed anytime after the chiller has been opened for
repair and exposed to the atmosphere. Whenever air enters the chiller during servicing or
repair it will have to be purged before restarting the chiller.
THE PURGE WILL
ACCOMPLISH THIS IN TWO PHASES, INITIALLY THE PUMPOUT COMPRESSOR WILL
RUN CONTINUOUSLY DUE TO AN EXCESSIVE QUANTITY OF NON-CONDENSABLE
AND A SMALL AMOUNT OF REFRIGERANT ENTERING THE PURGE TANK. THIS
PHASE OF OPERATION MAY CONTINUE UP TO SEVERAL HOURS, DEPENDING UPON
THE AMOUNT OF NON-CONDENSABLE PRESENT.
NOTE:
DURING THIS PHASE THE PUMPOUT FLOW RESTRICTOR MAY BE
TEMPORARILY BYPASSED TO MINIMIZE PUMPOUT TIME. (SEE "BYPASSING
PUMPOUT FLOW RESTRICTOR" ON PAGE 59).
Once enough non-condensables have been purged, a sufficient amount of refrigerant will
again enter the purge tank to cause the temperature Sen sor TS1 to begin cycling the pumpout
compressor. This is the second phase of the operation and the pumpout compressor may
cycle on and off frequently. As the system approaches a more normal condition the pumpout
compressor will cycle on and off less frequently.
NOTE
: When operating the purge under these conditions the “Bypass” Mode should
be used to avoid tripping out on excessive pumpout “Purge Fault” time . At the
end of the Fault “Bypass” time period, as set in the settings operational
parameters (on page 26), the purge will automatically resume normal operation.
NOTE:
Pumpout time accumulated during "Fault Bypass" is not added to the 30 -day
averaging pumpout log. However, it is added to "Cumulative" pumpout time.
NOTE:
When large amounts of air or nitrogen are involved, to maximize purge efficiency, it is
recommended that warm water (less than 100°F) be circulated through the
evaporator tube bundle, or start the chiller as soon as possible. Either procedure will
enhance purging efficiency by elevating the refrigerant pressure in the purge tank.
Содержание Redi-Purge PRG-113-C3
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