Frick QUANTUM - Engine

Engine
Hardware Signals
4 – 20 mA analog output – Signal from the
Quantum™ to provide the speed setpoint to the
speed governing device. The speed governing
device’s controller (i.e. Electronic Governor) and
hardware will need to be configured to the minimum
and maximum desired speed. The minimum speed
will vary depending on compressor type, consult the
factory application assistance.
4 – 20 mA analog input – Analog input channel on
the Quantum™ to monitor the actual RPM’s of the
drive. This signal can be sent to the Quantum™ from
the speed-governing device if available or generated
from a magnetic pickup located on the flywheel teeth
wired to a frequency to 4-20 mA converter.
Manifold Pressure (Engine only) – Pressure signal
required from the engine to detect and respond to
overload conditions.
Setpoints related to the Engine speed control output:
Idle Speed - If the Slide Valve is less than the
Highest Slide Valve Position to allow starting the
compressor setpoint, the Engine will be at idle.
Maximum output – Setpoint used to select the
maximum operating speed. Selectable from 1-100%
of the Quantum™’s 4-20 mA signal.
Minimum output – Setpoint used to select the
minimum operating speed. Selectable from 1-100% of
the Quantum™’s 4-20 mA signal.
Rate of change - Setpoint used to adjust the speed
changes sent to the VFD based on the capacity
control requirements. Selectable from .1-25% of the
4-20 mA signal.
Cycle Time – Setpoint used in conjunction with the
Rate of change setpoint to adjust the time between
speed changes sent to the VFD. Selectable from 1-30
seconds.
Slide Valve Position to begin Speed Increase –
The Slide Valve position which must be obtained
before the speed will begin to increase. Selectable
from 0-100% of the compressors Slide Valve position.
This setpoint is used in conjunction with the Drive
Output at Max SV position.
Drive Output at Max SV position – The desired
speed of the engine/turbine when the Slide Valve
position reaches 100%. This setpoint is selectable
from 1-100% of the Quantum™’s 4-20 mA signal and
is used in conjunction with the Slide Valve Position to
begin Speed Increase.
High RPM Alarm - If the RPM is greater than or
equal to this setpoint, for the alarm time delay, an
alarm occurs.
High RPM Shutdown - If the RPM is greater than or
equal to this setpoint, for the shutdown time delay, the
compressor will shut down.
High RPM Alarm Delay - The minimum time in
seconds that the RPM is greater than or equal to the
High RPM alarm setpoint before notification of the
alarm.
High RPM Shutdown Delay - The minimum time in
seconds that the RPM is greater than or equal to the
High RPM shutdown setpoint before the compressor
will shut down.
Low RPM Stop Load - If the RPM is less than or
equal to this setpoint, the compressor will be
prevented from further loading until the RPM is
greater than this setpoint. This setpoint helps avoid
forced unloading.
Low RPM Force Unload - If the RPM is less than or
equal to this setpoint, the compressor will be forced to
unload until the RPM is greater than this setpoint.
This setpoint helps avoid a low RPM alarm or
shutdown.
S90-010 O FRICK QUANTUM™ COMPRESSOR CONTROL PANEL
Page 28 OPERATION