QUANTUM™ HD COMPRESSOR CONTROL PANEL
OPERATION
090.040-O (MAR 12)
Page 51
DESCRIPTION: This screen allows the user to enter and
view the basic operating parameters related to EZ Cool
LIOC PI control.
The following are the EZ Cool LIOC Setup screen selec-
tions available on this screen:
EZ COOL PI CONTROL
[Setpoint] - Enter the value that you wish to
control to.
[Proportional Band] – This setpoint determines
the size of a region either above or below the
Control Setpoint. Within this region, the Pro-
portional component of the PI Output value is
the number between 0% and 100% that directly
corresponds to the difference between the Con-
trol Input (Actual) and the Control Setpoint (Set-
point). Outside of this region, the Proportional
component is either 100% or 0%. If the PI’s Ac-
tion is Forward, the Proportional Band extends
above the Control Setpoint. If the PID’s Action
is Reverse, the Proportional Band extends below
the Control Setpoint.
[Integration Time] - This setpoint controls the
infl uence that the Integral component exerts on
the PI Output value. The Integral component
works to push the Control Input toward the Con-
trol Setpoint by tracking the difference between
the Control Input and the Control Setpoint over
time.
High Limit - The highest value that the output
can be.
Low Limit - The lowest value that the output
can be.
I/O Board - One of the following will be shown:
• None
• Analog Board 1
• Analog Board 2
I/O Channel - The output channel that will be
used will be shown.
Port Multiplier - The standard value is 1 (one).
DIGITAL CONTROL
An output is provided for an optional Liquid In-
jection solenoid valve. The function of this out-
put is only available if the compressor has Liquid
Injection oil cooling and it has been enabled. Liq-
uid Injection controls the supply of liquid refrig-
erant to the compressor. Liquid Injection is off
(the solenoid is closed) if the compressor is off.
CONTROL SETPOINTS
Liquid Injection LIOC
ACCESSING:
Liquid Injection LIOC
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