Emerson CW026 Design Manual page 122

Guide Specifications—Chilled Water Environmental Control System
3.3 LIEBERT ICOM
The Liebert iCOM shall be factory-set to allow precise monitoring and control of the condition of the air
entering and leaving the unit. This control shall include predictive methods to control air flow and cooling
capacity based control sensors installed. Proportional and Tunable PID shall also be user-selectable
options.
3.3.1 Controlling Sensor Options
The Liebert iCOM shall be flexible in the sense that it shall allow controlling the capacity and fan from
multiple different sensor selections. The sensor selections shall be:
3.3.1.1 Cooling Capacity
• Supply
• Remote
• Return
3.3.1.2 Fan Speed
• Supply
• Remote
• Return
• Manual (for diagnostic or to receive a signal from the BMS through the Liebert remote monitoring
devices or analog input)
• Static Pressure
3.3.2 Temperature Compensation
The Liebert iCOM shall have the ability to adjust the capacity output based on supply and return
temperature conditions to meet SLA guidelines while operating to highest efficiency.
3.3.3 Humidity Control
Dew point and relative humidity control methods shall be available (based on user preference) for humidity
control within the space.
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Liebert CW System Design Manual
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CONTROL METHODS AND OPTIONS
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