Vertiv Liebert iCOM User Manual

3.1.5 Setting Temperature Compensation
Temperature compensation provides protection from changes that affect capacity and heat load by monitoring temperature
conditions and fan speed settings, then automatically adjusting the temperature setpoint. Changes that may cause
temperature compensation are floor tile removal in non-cold aisle areas, incorrect supply temperature setpoint, unit failure in a
neighboring zone, or unexpected heat load fluctuations at rack equipment.
Temperature compensation is also tied in to cascade/standby operation in Teamwork Mode 3. See Teamwork Mode3—
Optimized Aisle Operation on page105 .
1. Touch , then > Setpoints >Temperature Compensation. The TEMPERATURE COMPENSATION
secondary panel opens.
2. Select the Compensation Type, then touch Save. The setpoint is updated.
• Return temperature compensation cannot be used when both fan and cooling control is set to Return.
• Supply temperature compensation requires the following settings:
Temperature Control Sensor: Supply Sensor
Fan Control Sensor: Remote Sensor
NOTE: When temperature compensation is enabled and active, the Temperature Setpoint Act field on the
Temperature Control setpoints panel displays the adjusted setpoint value.
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 Vertiv™ Liebert® iCOM™ display.
Temperature Compensation Options
Compensation Type
Selects the compensation routine:
• No: Temperature compensation routine disabled.
• Return: Increases the temperature setpoint when the return air temperature is too cold.
• Supply: Decreases the temperature setpoint when the air flow capacity approaches 100% and the cold aisle
temperature remains above the setpoint.
• Supply+Return: Allows both supply and return compensation.
3.1.6 Fan Temperature Compensation
For applications where unit fan speed is being controlled off the return sensor, Vertiv™ Liebert® iCOM™ shall also support the
capability of simultaneously utilizing remote 2T sensor values to override the return air temperature setpoint associated with
fan speed control. Once enabled, when a high remote temperature is detected, the Fan Temperature Compensation routine
shall temporarily increase fan speed output to compensate for the high remote temperature by decreasing the return
temperature setpoint by a value specified by the end-user.
3 Service Operation
37
Vertiv™ Liebert® iCOM™Installer/User Guide

Vertiv Liebert iCOM Specifications

General

Brand	Vertiv
Model	Liebert iCOM
Category	Control Unit
Language	English