FRICK QUANTUM CONTROL PANEL
OPERATION
S90-010 O
Page 30
The following displayed Oil Setpoints can not be modified:
Low Oil Pressure Alarm - If the Oil Pressure is less
than or equal to this setpoint, for the alarm time delay,
an alarm occurs.
Low Oil Pressure Shutdown - If the Oil Pressure is
less than or equal to this setpoint, for the shutdown
time delay, the compressor will shutdown.
Low Oil Pressure Alarm Delay - The minimum time in
seconds that the Oil Pressure is less than or equal to
the Low Oil Pressure Alarm setpoint before notification
of the alarm.
Low Oil Pressure Shutdown Delay - The minimum
time in seconds that the Oil Pressure is less than or
equal to the Low Oil Pressure Shutdown setpoint be-
fore the compressor will shut down.
Low Oil Pressure Alarm and Shutdown - Is deter-
mined by the type of pump and its running mode, and
from the pressure differential of the Oil Pressure read-
ing above or below the Discharge Pressure reading.
The following tables show the setup of the Oil Setpoints that
are only modified:
Running Full Lube Pump and Running Cycling Pump Oil
Pressure - Discharge Pressure = Oil Pressure Differential
Alarm Shutdown
Oil Pressure Differential 10 PSID 5 PSID
Time Delay 30 sec. 10 sec.
Other Manufacture’s Compressor Pump (Full Lube) Oil Pres-
sure - Discharge Pressure = Oil Pressure Differential
Alarm Shutdown
Oil Pressure Differential 25 PSID 20 PSID
Time Delay 5 sec. 5 sec.
Prelube Pump and Not Running Cycling Pump
Discharge Pressure - Oil Pressure = Oil Pressure Differential
RWB II Alarm Shutdown
Oil Pressure Differential 25 PSID 30 PSID
Time Delay 30 sec. 10 sec.
RXF and RXB Alarm Shutdown
Oil Pressure Differential 35 PSID 40 PSID
Time Delay 30 sec. 10 sec.
Additionally a safety check is made for low oil flow that will
stop the compressor from loading or force the compressor
to unload. This check is made only for a RWB with prelube
or a RXB with no pump:
• If [Oil Pressure <= (1.5 x Suction Pressure) + 10 lb] then
the compressor will be forced to unload to 50% slide
valve. If this condition is reached the message “Forced
Unload - Low Oil Flow” is shown on the “Operating
Status” screen.
• If [Oil Pressure <= ((1.5 x suction pressure) + 15 lb) and
(slide valve >= 48 %)] then the compressor will be
prevented from further loading. If this condition is
reached the message “Stop Load - Low Oil Flow” is
shown on the “Operating Status” screen.
The following special selections are on this screen:
[Main Oil Injection] - This selection is only available if
it was enabled in Factory Setup. The following Oil
Setpoints are on this screen:
On at Discharge Temperature - If the high stage
compressor is running and the Discharge Tempera-
ture is greater than or equal to this setpoint, for the
time delay, the Main Oil Injection Discharge Tem-
perature output on digital board #2 is energized.
Delay - The minimum time in seconds that the Dis-
charge Temperature is less than or equal to the
“On at Discharge Temperature” setpoint before the
Main Oil Injection Discharge Temperature output
on digital board #2 is energized.
[Liquid Injection] - This selection is only available if the
compressor has Liquid Injection Oil cooling and it was
enabled through Factory Setup. This selection displays
the “Liquid Injection Cooling” screen. Liquid Injection
controls the supply of liquid refrigerant to the compres-
sor. Liquid Injection is off (the solenoid is closed) if the
compressor is off. This screen has the following
setpoints:
Oil Temperature On at - While the compressor is
running, if the Oil Temperature equals or exceeds
this setpoint, for the delay time, the Liquid Injec-
tion output will be energized or turned on to open
a liquid valve. If the output is energized it will be
de-energized or turned off, if the Oil Temperature
is 1°C below this setpoint.
Oil Temperature Delay - The minimum time in sec-
onds that the Oil Temperature is greater than or
equal to the Oil Temperature “On at” setpoint when
the compressor is running, before the Liquid In-
jection output is turned on.
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