Emerson Liebert iCOM Manual De Usuario

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

• 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)

• Teamwork Mode 3: Allows the cooling capacity (Supply Sensor) to operate as a local control by 

removing only the amount of load required to maintain the discharge air temperature at each 

unit. This allows for an unbalanced room load while maintaining a consistent discharge air 

temperature. The fan speed is controlled by the remote rack sensors (return, supply, under floor 

static pressure) of all units, providing a controlled delivery method of the air to the cold aisle. In 

raised floor applications, Liebert iCOM units will share sensor information to achieve even 

under-floor air distribution. This distribution is achieved by operating all fans in parallel, which 

will also yield the greatest energy efficiency.

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 90). Autoset will not 

adjust the proportional band in this mode.

Teamwork Mode 1 works best in small rooms with balanced heat loads. The return temperature and 

humidity sensor readings of all units in operation (fan on) are averaged by the master unit, Unit #1, 

and used for control. The master unit will send the operating requirements to all operating units 

according to unit numbers, rotated by one unit every 24 hours.
In this teamwork mode, most of the parameters are shared; if set in any one of the units, all other 

units will follow with the same settings. AutoSet will adjust the proportional band in Teamwork 

Mode 1, see 3.3 - Temperature Control.
The master unit evenly divides the system proportional band among the number of available units. 

Each unit will receive instruction on how to operate from the master unit based on how far the system 

deviates from the setpoints.
The number of available units is calculated like:

• In non-standby configuration: all units with fan on
• In typical standby function (no cascade): all units with fan on
• In cascade mode: all units that could operate (no alarm, which forces the unit to switch Off, unit 

not switched Off, etc.)

Figure 64 shows how two cooling units work together in Teamwork Mode 1,staging compressors 

serially. Since Unit 1 and Unit 2 are available to operate, the master unit, Unit 1, collects the average 

or maximum (based on S804 “Teamwork is based on” programming) temperature and humidity 

sensor readings from each unit. Settings in S804 “Teamwork is based on” programming determines 

whether the unit uses the average or maximum temperature and humidity sensor.