FRICK
QUANTUM™ COMPRESSOR CONTROL PANEL S90-010 O
OPERATION Page 91
OPERATION OVERVIEW
Initial Setup Procedure:
1. Factory Setup should be performed by a Factory
Representative or Distributor to setup the customer
specific control features which should not need to be
changed by operators.
2. Panel Setup is performed to setup panel features and
options, which can later be changed by an operator.
Features such as the panel time, and screen color are
changed here. Options such as Condenser Control
are enabled here. The operator can avoid viewing and
entering settings of unused controls by keeping
unused options disabled.
3. Calibrate the control devices.
4. From Control Setup, enter and setup the control
settings.
5. From Security Setup, establish the desired access
rights of the operators.
6. The Operating Status screens now provide quick
access to the most important information and controls
of the compressor unit and the subsystems.
Compressor Start-Up Procedure:
• Starting is shown for the Compressor status on the
Operating Status screen.
• All the safeties are checked. If any shutdown
condition is present the corresponding alarm
message is shown and the compressor is prevented
from starting.
• The oil lubrication is checked. A Prelube pump needs
a 5 lb. oil pressure differential to allow the compressor
to start. A full time pump needs a 20 lb. Oil Pressure
differential to allow the compressor to start. Other
compressor manufacture’s Oil Pumps needs a 30 lb.
Oil Pressure differential to allow the compressor to
start. If one of these conditions is not present an
alarm message is issued and the compressor is
prevented from starting.
• The Slide Valve position is checked to see if it is less
than or equal to the Highest Slide Valve Position to
allow starting the compressor setpoint. If the Slide
Valve position is higher than this, the compressor is
prevented from starting.
• If none of the above conditions has prevented the
compressor from starting, a timer delay is started that
requires the starting conditions to remain satisfied for
a period of five seconds for all compressor model
types except [Other Compressor Manuf.]. The Other
compressor model type uses a 20 seconds delay.
After the time delay the compressor and the Recycle
Delay timer are started.
• If within 30 seconds, the Compressor Start Auxiliary
input has not been energized, or Motor Current is not
detected, then an alarm message is issued and the
compressor is shut down.
• When the compressor begins running, the Oil
Pressure values are in a state of change. For a period
of 10 seconds after the compressor status switches to
Running, the low Oil Pressure alarm and shutdown
safeties are ignored.
Compressor Stopping Procedure:
During the compressor stopping, the Slide Valve unload
solenoid remains energized until the Slide Valve is
unloaded to or below 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 Unable to Unload - Alarm is
issued.
Setup For Automatic Control:
In order to operate a compressor at peak efficiency, under
full load and part load conditions complex control
sequences must be used. In order to obtain the
efficiencies, Automatic Control is almost mandatory.
Automatic control of the Slide Stop and Slide Valve
increases the compressor efficiency over a wide operating
range. The following steps (which are relevant) should be
taken to control in Automatic:
• The compressor should be in automatic
(automatic cycling) so the compressor will start
and stop according to the Autocycle setpoints.
• The Oil Pump should be in auto because it’s
operation coincides with that of the compressor.
• The Slide Valve and the Slide Stop should be in
Automatic so they are controlled by setpoints and
internal control logic.
Note: If there is a shutdown in response to a safety
setting, a compressor in Automatic mode is placed
into Manual mode requiring operator intervention.
Remote Control Of The Compressor:
The following digital outputs and inputs (on Digital Board
2) have been provided that can be used to control the
compressor from another controller such as a PLC:
• (Module 1) - Ready to Run - This output is
energized while the compressor is not shutdown
and the Recycle Delay has timed out.
• (Module 2) - Remote Enabled - This output is
energized while the compressor is in Remote
Start mode.
• (Module 3) - Remote Start / Run / Stop - If the
compressor is in Remote Start mode with no
Recycle Delay time and this input is energized,
the compressor is started. If
this input is
energized and the compressor is started, it will
continue to run. If this input is de-energized, the
compressor is stopped.
• (Module 4) - Remote Load or Remote C.C step
1 for step units
• Remote Load - If the Slide Valve is in
Remote Mode and this input is energized,
the Slide Valve load solenoid will be
energized provided there are no safety
overrides preventing loading.
• Remote C.C step 1 for step units - If the
Capacity Mode is in Remote this input is
used to step on and off capacity according to
the Remote Capacity Control chart.
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