FRICK QUANTUM CONTROL PANEL
OPERATION
S90-010 O
Page 18
Upper Cycle Time - This setpoint determines the
amount of time in seconds that the load output is on
and off, when in the upper proportional band. Refer to
the above description about cycle time.
Lower Cycle Time - This setpoint determines the
amount of time in seconds that the unload output is on
and off, when in the lower proportional band. Refer to
the above description about cycle time.
Start Autocycle - The compressor is started at this
setpoint when it is under automatic control.
Stop Autocycle - The compressor is stopped at this
setpoint when it is under automatic control.
Start Time Delay - The minimum time in minutes that
the actual Capacity Control value must equal or ex-
ceed the start autocycle (automatic cycling) setpoint
before the compressor will start. This timer helps pre-
vent cycling a compressor on and off due to short or
sudden changes in load within the refrigeration sys-
tem.
Stop Time Delay - The minimum time in minutes that the
actual Capacity Control value must equal or exceed the stop
autocycle (automatic cycling) setpoint before the compres-
sor will stop. This timer helps prevent cycling a compressor
on and off due to short or sudden changes in load within the
refrigeration system.
The following special key is on these screens:
[Make Active] - Selecting this key, switches the active
control mode to the Capacity Control setpoints being viewed.
Only one Capacity Control mode can be active.
The following special toggle key is on a “Suction Pressure
Control Mode” screen:
[Change To Temp.] - Changes the capacity control set-
point and actual reading along with the autocycle set-
points to display as temperature values. The Propor-
tional and Dead Bands are displayed as temperatures
but cannot be changed unless they are displayed as
pressures.
[Change To Pressure] - Changes the Capacity Con-
trol setpoint and actual reading along with the autocycle
setpoints to display as pressure values.
“SUCTION PRESSURE CONTROL MODE 1”
OR
“SUCTION PRESSURE CONTROL MODE 2”
OR
“PROCESS TEMPERATURE MODE #1”
OR
“PROCESS TEMPERATURE MODE #2”
OR
“DISCHARGE TEMPERATURE CONTROL MODE 1”
OR
“DISCHARGE TEMPERATURE CONTROL MODE 2”
OR
“DISCHARGE PRESSURE CONTROL MODE 1”
OR
“DISCHARGE PRESSURE CONTROL MODE 2”
DISPLAY
The following setpoints are required for separate entry into
each of the control setpoint screens listed above:
Low Suction Pressure Stop Load - If the Suction Pres-
sure is less than or equal to this setpoint, the compres-
sor will be prevented from further loading until the Suc-
tion Pressure is greater than this setpoint. This setpoint
helps avoid forced unloading.
Low Suction Pressure Force Unload - If the Suction
Pressure is less than or equal to this setpoint, the com-
pressor will be forced to unload until the Suction Pres-
sure is greater than this setpoint. This setpoint helps
avoid the low Suction Pressure alarm and shutdown.
Low Suction Pressure Alarm - If the Suction Pressure
is less than or equal to this setpoint, for the alarm time
delay, an alarm occurs.
Low Suction Pressure Shutdown - If the Suction Pres-
sure is less than or equal to this setpoint, for the shut-
down time delay, the compressor will shut down.
Low Suction Pressure Alarm Time Delay - The mini-
mum time in seconds that the Suction Pressure is less
than or equal to the low Suction Pressure alarm set-
point before notification of the alarm.
Low Suction Pressure Shutdown Time Delay - The
minimum time in seconds that the Suction Pressure is
less than or equal to the low Suction Pressure shut-
down setpoint before the compressor will shut down.
The following setpoints are required for separate entry into
the “Process Temperature Control” screen:
Low Process Temperature Stop Load - If the Process
Temperature is less than or equal to this setpoint, the
compressor will be prevented from further loading until
the Process Temperature is greater than this setpoint.
This setpoint helps avoid forced unloading.
Low Process Temperature Force Unload - If the Pro-
cess Temperature is less than or equal to this setpoint,
the compressor will be forced to unload until the Pro-
cess Temperature is greater than this setpoint. This
setpoint helps avoid the low Process Temperature alarm
or shutdown.
Low Process Temperature Alarm - If the Process Tem-
perature is less than or equal to this setpoint, for the
alarm time delay, an alarm occurs.
Low Process Temperature Shutdown - If the Process
Temperature is less than or equal to this setpoint, for
the shutdown time delay, the compressor will shut down.
Alarm Delay - The minimum time in seconds that the
Process Temperature is less than or equal to the low
Process Temperature alarm setpoint before notifica-
tion of the alarm.
Shutdown Delay - The minimum time in seconds that
the Process Temperature is less than or equal to the
low Process Temperature shutdown setpoint before the
compressor will shut down.
To Next Page
Loading...
