Vertiv Liebert iCOM - Page 33

Heater Deadband
Widens the setpoint to prevent small temperature changes from cycling re-heat components.
Temperature Control Sensor
Selects sensor that controls cooling. Values are:
• Supply Sensor: Temperature control is based on maintaining the temperature of the discharge air from the
cooling unit. See Supply Sensors on page160 .
• Remote Sensor: Temperature control is based on the temperature reading(s) from wired remote/rack sensor(s).
See Wired Remote Sensors on page157 .
• Return Sensor: Temperature control is based on maintaining the temperature of the room air.
• Customer input setpoint (remote alarm device)
With regards to Temperature Control and Fanspeed Control, Liebert® iCOM™ controller shall support the following sensor
configurations:
• Mode A: Cooling = Supply Sensor, Fanspeed = Supply Sensor
• Mode B: Cooling = Remote Sensor, Fanspeed = Remote Sensor
• Mode C: Cooling = Return Sensor, Fanspeed = Return Sensor
• Mode D: Cooling = Supply Sensor, Fanspeed = Remote Sensor
• Mode E: Cooling = Supply Sensor, Fanspeed = Return Sensor
NOTE: Sensor configurations A-E are supported in Teamwork Mode 2 - Independent and Teamwork Mode 3 -
Optimized Aisle.
NOTE: Sensor configurations B & C are supported in Teamwork Mode 1 - Parallel.
NOTE: Prior to enabling any version of Teamwork Mode, the controlling sensors for Temperature Control (cooling
capacity) and Fanspeed Control must first be defined within Liebert® iCOM™.
Temperature Control Type
Control when staging cooling and heating operations. Values are:
• Proportional: Percent of cooling/heating determined by the difference between the air temperature sensor
reading and the temperature setpoint.
• P: Percent of cooling/heating calculated using the temperature proportional band and temperature-integration
time settings. See Considerations when Using PI Temperature Control on page28 .
• Adaptive PID: Auto-tuning PID control loop, can be set for cooling. Only available on Liebert® chilled water
systems.
• Intelligent: Percent of cooling/heating determined by programmed logic that simulates manual human control.
Temperature Deadband
Widens the setpoint to prevent small temperature changes from cycling compressors and valves maximizing
component life. When temperature is within the deadband, no change of the control output (heating/cooling) occurs.
3 Service Operation
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Vertiv™ Liebert® iCOM™Installer/User Guide