Filter Pressure Setpoints
This screen has the following setpoints:
High Filter Pressure Alarm - If the Filter Pressure is
greater than or equal to this setpoint, for the alarm time
delay, an alarm occurs.
High Filter Pressure Shutdown - If the Filter
Pressure is greater than or equal to this setpoint, for
the shutdown time delay, the compressor will shut
down.
High Filter Pressure Alarm Delay - The minimum
time in seconds that the Filter Pressure is greater than
or equal to the High Filter Pressure Alarm setpoint
before notification of the alarm.
High Filter Pressure Shutdown Delay - The
minimum time in seconds that the filter pressure is
greater than or equal to the High Filter Pressure
Shutdown setpoint before the compressor will shut
down.
Overview of the Oil Pump Operation
A Prelube Pump is turned on if the Slide Valve is too high.
While the compressor is running the Prelube Pump is
turned off. A Full Time Pump is always turned on while the
compressor is starting and running. The Cycling Pump is
cycled on and off while the compressor is running in
response to the pressure differential calculation. The
differential equals the Discharge Pressure reading minus
the Suction Pressure reading. The pump is turned on if
[Discharge – (1.4
k
* Suction)] < 35. The pump is turned off
if [Discharge – (1.4
k
* Suction)] > 45.
During the compressor stop cycle, the Oil Pump is used
for a postlube operation that is performed to help unload
the Slide Valve. During the postlube, the Oil Pump will be
turned on for five (5) minutes or until the Slide Valve is
unloaded to or below the Highest Slide Valve position to
allow starting the compressor setpoint. The compressor
can not be restarted unless the Slide Valve is less than the
Highest Slide Valve position to allow starting the
compressor setpoint. If the Slide Valve does not unload
below this setpoint within 5 minutes, the alarm message
Compressor Unload Failure - Alarm is issued.
Dual Pumps are enabled in Factory Setup. The lead pump
is the pump selected to be the first pump to run. If the lead
pump has a pump auxiliary failure, an alarm message is
issued and the other pump will be turned on. If the
compressor has a Low Oil Pressure Alarm failure, the
second pump will be turned on; then after a 30 seconds
delay, the lead pump will be turned off. If while the
compressor is running the second pump has an auxiliary
failure or low Oil Pressure is encountered, a shutdown
message and action is issued.
FRICK QUANTUM™ COMPRESSOR CONTROL PANEL S90-010 O
OPERATION Page 35
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