Emerson Liebert iCOM User Manual download pdf (Page 48)

Teamwork

4.0 TEAMWORK

Unit-2-Unit (U2U) communications via a private network will allow the following functions to be

placed into operation when the requirement exists. The user must install the correct hardware

(see 5.0 - Installing a Liebert iCOM Unit-to-Unit Network) and properly program the units for

the selected functionality.

The Liebert iCOM network can perform the following functions:

The Teamwork Mode functions allow for multiple stages of cooling/heating and

humidification/dehumidification. Teamwork Mode can be used to prevent environmental units from

“fighting,” where one environmental unit might be cooling while another unit is heating.

The Standby (Lead/Lag) function allows one or more units to be set as “Running” and “Standby” for

activation in case of an alarm. This function also allows the units to be programmed in a rotation to

help ensure “Standby” unit operation.

The Cascade Operation function allows additional units to be staged-on based on the temperature

or humidity requirement.

4.1 Teamwork Modes

Groups of cooling units connected to a network can be set up to work together in any of three

teamwork modes:

•No Teamwork

• Teamwork Mode 1

• Teamwork Mode 2

All Liebert iCOM-controlled cooling units on a network must be set to run in the same teamwork

mode.

4.1.1 Application of Teamwork Modes

• No Teamwork: Multiple zones in one room

• Teamwork Mode 1: Balanced load (small groups of units inside the same environment)

• Teamwork Mode 2: Unbalanced load (large rooms, not all units will have the same load) (work

well for most applications)

All units in a network will run in the same Teamwork Mode.

4.1.2 No Teamwork

All cooling units work independently, responding to their own sensors.

Standby function and unit rotation are possible, but cascading is not (see Standby and Cascade on

page 44). Autoset will not adjust the proportional band in this mode.

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Emerson Liebert iCOM User Manual Page 48