Assigning Cooling Units To Standby (Lead/Lag) - Vertiv Liebert iCOM DP400/500 Installer/User Manual

To Set Up Optimized Aisle Operation
1. Set wired remote sensor function and mode:
• Touch
• Touch each sensor name, and select Control or Reference in Function based on rack setup 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
all the wired remote sensor settings.
2. At each unit in the group:
• Touch
• In Temperature Control Sensor, select Supply Sensor, then touch Save.
• In Temperature Setpoint, select the setpoint based on the cooling unit's area of influence, then touch
Save.
3. At the master unit:
• Touch
• In Fan Control Sensor, select Remote Sensor, then touch Save.
The other units in the group are set automatically.
• Touch
• In Teamwork Mode, select 3 Optimized Aisle.
• In Teamwork is based on, select Maximum or Average, then touch Save.
Teamwork mode 3 is set.
4. Monitor operation of the cooling units and adjust setpoints and control bands as necessary.

6.3 Assigning Cooling Units to Standby (Lead/Lag)

Stand-by assigns some units to operate while others are on standby, which is idle but ready to become active in the event of
an alarm condition in one of the operating units or based on a rotation schedule.
When a unit is in standby mode, fan(s) are off and no cooling occurs. In multiple cooling unit systems, assigning units to
standby lets you:
• Configure redundancy in case of failure scenarios (stand-by).
• Manage cooling unit run time (lead/lag). See
• Modulate for very low loads to full-design load (to be temperature reactive) by cascading activation of standby
units (configured when setting-up teamwork mode).
6 Teamwork, Standby and Rotation for Cooling Units
, then > Auxiliary Device Setup > Sensors > Wired Remote Sensors.
, then > Setpoints > Temperature Control.
, then > Setpoints > Fan Control.
, then > BMS & Teamwork Setup > Teamwork / Standby > Teamwork Mode.
Setting a Rotation Schedule
Wired Remote Sensors on page 86, for descriptions of
on the next page.
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