Vertiv Liebert iCOM - 6.2.5 Teamwork Mode 3-Optimized Aisle Operation

6.2.4 Teamwork Mode 2—Independent Operation
Teamwork mode 2 works well for most applications, and best in large rooms with un-balanced heat loads by preventing units
in a group from operating in opposing modes, some cooling and some heating. All temperature and humidity parameters are
shared by the group. The master unit monitors all available unit-sensor readings and determines the demand for cooling,
heating, humidification and dehumidification, then sends operating instructions to address the greatest demand.
In Teamwork mode 2, the setpoints for all units must be identical. The proportional band, deadband, and related settings may
differ by unit. Fan speed is modulated per unit. Rotation and cascading is not available, so expect uneven distribution of work
hours.
6.2.5 Teamwork Mode3—Optimized Aisle Operation
In Teamwork Mode 3, the fan speed for all units operates in parallel, which means fan speed operation is identical at each unit.
However, cooling capacity operates independently for each unit.
Teamwork mode 3 takes advantage of variable speed fan options and variable capacity component options to maintain rooms
with an unbalanced load and to prevent units in a group from operating in opposing modes. All units operate in the same
mode based on the average or worst case (maximum) readings from the unit sensors. A local control (cooling capacity supply
sensor) provides input to manage and maintain the discharge-air temperature at each unit. In addition, fan speed and
operation are controlled based on readings from the unit temperature or static pressure sensors to control air delivery to the
cold aisle.
NOTE: Standby and lead/lag are available when using optimized aisle mode, but is not recommended because it
requires less power to run all units at reduced capacity.
Setting Up Teamwork Mode 3
Teamwork mode 3 requires the following:
• Vertiv™ Liebert® iCOM™ connection to a U2U network.
• Variable capacity compressors in the cooling unit.
• Variable speed fans in the cooling unit.
• Supply control air temperature sensors.
In addition, specific settings for wired remote (rack) sensors and setpoints are needed as described in the following steps.
To Set Up Optimized Aisle Operation
1. Set wired remote sensor function and mode:
• Touch , then > Auxiliary Device Setup > Sensors > Wired Remote Sensors.
• Touch each sensor name, and select Control or Reference in Function based on rack set-up or preference,
then touch Save.
• On the SENSORS panel, touch Setup under Wired Remote Sensors, and select Maximum or Average in
Unit Remote Sensors Mode, then touch Save.
See Wired Remote Sensors on page157 , for descriptions of all the wired remote sensor settings.
6 Teamwork, Standby and RotationforCoolingUnits
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Vertiv™ Liebert® iCOM™Installer/User Guide