Setting Compressor Options - Vertiv Liebert iCOM DP400/500 Installer/User Manual

Minimum Fan Speed
Minimum speed at which the fan will operate.
No Power Fan Speed
Speed at which the fans operate when using emergency power.
STD at CFC for EC Fan
Cooling deviation at which the fan will operate at maximum speed.

3.3.5 Setting Compressor Options

1. Touch
displays.
2. Make adjustments as needed and click Save. The option settings are updated.
• Touch Cancel to discard the changes without saving.
NOTE: Depending on the type of thermal management unit, included components, and control settings of your
system, all of the options listed may not be available on your iCOM display.
Compressor Settings Options
Ball Valve Setpoint Offset
Adjusts sensitivity to compressor discharge pressure or liquid pressure by increasing sensitivity. The higher the
added pressure, the more the valve opens.
Capacity Change at 0%
Decreases the rate at which cooling capacity changes when close to or at the temperature setpoint to avoid
undershooting the setpoint.
Capacity Change at 100%
Increases the rate at which the cooling capacity changes for a quicker reaction of cooling at high temperatures.
Compressor Sequence
Selects the lead compressor when cooling activates. Values are:
• Auto: Compressor with the lowest run hours leads.
• 1: Compressor 1 leads.
• 2: Compressor 2 leads.
Winter Start Delay
Length of time, in minutes, that a low pressure condition is ignored during compressor startup. See
Pressure Time Delay
3 Service Operation
, then > Options Setup > Compressor Settings. The COMPRESSOR SETTINGS panel
on the next page.
Setting Low
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