QUANTUM™ HD COMPRESSOR CONTROL PANEL
OPERATION
090.040-O (MAR 12)
Page 68
DESCRIPTION: This screen allows the user to enter and
view the 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
• Disabled
• Enabled
SOLENOID 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.
[On When Above] - When the Discharge
Temperature is above this setpoint, the Liq-
uid Injection solenoid output will energize,
until the Discharge Temperature drops be-
low this setpoint.
[Off When Below] - When the Discharge
Temperature is below this setpoint, the Liq-
uid Injection solenoid output will de-ener-
gize, until the Discharge Temperature raises
above this setpoint.
EZ COOL STATUS
Discharge Temperature - The actual Discharge
temperature is shown here.
Control Output - The value of the Output sig-
nal as controlled by the PI. This is not a setpoint
value.
Valve Position - The value shown here repre-
sents the position of the valve with relationship
to the Control Output.
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
CONFIGURATION
Package - Liquid Injection
ACCESSING:
Package Liquid Injection
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