Frick QUANTUM - Page 37

FRICK QUANTUM CONTROL PANEL
OPERATION
S90-010 O
Page 37
Lower Proportional Band - A band, measured in the
units of the Capacity Control setpoint, below the lower
dead band, where proportional unload control is used.
If the actual reading falls into this proportional band,
the unload output will be pulsed as explained above in
the description about proportional band.
Upper Dead Band - A band, measured in the units of the
Capacity Control setpoint, above the setpoint at which the
compressor will neither load nor unload.
Lower Dead Band - A band, measured in the units of the
Capacity Control setpoint, below the setpoint at which the
compressor will neither load nor unload.
The Cycle Time setpoint determines the amount of time the
output is on and off, when in the proportional band. At the
completion of the cycle time, the actual reading and neces-
sary response is reevaluated. If a 4 second period is se-
lected, then the following will result:
Proportional
Distance
Actual Reading is Output Pulsed Output Off
From Setpoint On (Seconds) (Seconds)
004
1/4 1 3
1/2 2 2
3/4 3 1
140
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 - A compressor is started at this setpoint. This is the
“Start Autocycle” setpoint of the active Capacity Control. A
compressor is started at this setpoint during compressor
sequencing.
Stop - A compressor is stopped at this setpoint. This is the
“Stop Autocycle” setpoint of the active Capacity Control. A
compressor is stopped at this setpoint during Compressor
Sequencing.
”Compressor Sequence Control” (MODE 1) SCREEN