FRICK
QUANTUM™ COMPRESSOR CONTROL PANEL S90-010 O
OPERATION Page 43
Low Shutdown - If the analog reading is less than or
equal to this setpoint, for the shutdown time delay, the
compressor will shut down.
Low Shutdown Delay - The time in seconds that the
analog reading is less than or equal to the analog
shutdown setpoint before the compressor will shut
down.
The following screen keys are used for each auxiliary
analog to setup how the analog reading will be used:
[Change Setpoints] - Changes the alarm settings
and delay seconds that produce either an alarm or a
shutdown.
A toggle key is provided that changes when the failure is
checked:
[Analog 1 Checked Always] - If the Analog 1 input
module is presently checked When running, this
screen key is shown so that the operator can change
when it is checked to Always Active.
[Analog 1 Checked Running] - If the Analog 1 input
module is presently checked Always Active, this
screen key is shown so that the operator can change
when it is checked to When running.
Pumpdown/DX Circuit
This screen is shown if Pumpdown/DX Circuit control was
enabled in Panel Setup. Pumpdown provides for pumping
down the refrigerant (removal of the refrigerant gas). For
example, this can be used for removing the refrigerant
from a shell and tube heat exchanger to prevent its
standing water from freezing. When Pumpdown is enabled
and the compressor is stopped the DX circuits digital
outputs are de-energized but the compressor remains
running for the delay period. The time remaining for
Pumpdown is displayed on the Operating Status screen
in the compressor status box. When the delay period
times out, or the Suction Pressure falls below the On
When Above setpoint, the compressor is turned off. To
force a compressor that is in Pumpdown to stop, press the
compressor stop screen command key again.
This screen has the following setpoints for Pumpdown:
On when above - After sending the compressor stop
command, if the Suction Pressure reading is above
this setpoint, Pumpdown will be invoked. In
Pumpdown, the compressor will stay on to continue
vaporizing the refrigerant.
Delay - The amount of time in minutes the
compressor will Pumpdown before it is stopped.
This screen provides for the setup of the DX (direct
expansion) circuits (DX Circuit #1 and DX Circuit #2). The
settings will determine when to turn on and off these digital
outputs. This screen shows the current status of the digital
outputs.
This screen has the following Slide Valve setpoints for
both DX Circuits:
Off when below - If the compressor is running and
control was selected as and at proper Slide Valve
position, then the DX Circuit output is off if the slide
valve is below this setpoint.
On when above - If the compressor is running and
control was selected as and at proper Slide Valve
position, then the DX Circuit output is on if the Slide
Valve is above this setpoint.
A toggle key is provided for each of the outputs to
determine when the output is energized:
[Slide Valve Position] - The Slide Valve setpoints
will be used to turn on and off this digital output, when
the compressor is running.
[Always] - This output will always be turned on when
the compressor is running.
To Next Page
Loading...
