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Operation in Teamwork Mode
Liebert
®
CRV
™
100
Figure 93 Teamwork modes and sensor management
11.4.1 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.
11.4.2 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 102). AutoSet will not adjust the proportional band in this mode.
11.4.3 Teamwork Mode 1
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.
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.)
NOTE
1. Proportional actuators (chilled water valve, free-cooling actuator) are driven in parallel in
all units.
2. Changeover to second cooling source, low limit during dehumidification and low supply
limit control air local functions, managed from each unit independently.
Liebert CRV 1
Max = 72°F (22°C)
Liebert CRV 2
Max = 76°F (24°C)
Liebert
CRV 1
Liebert
CRV 2
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Teamwork Sensor Average = 74°F (23°C)
Teamwork Sensor Maximum = 76°F (24°C)
Average / Maximum of Liebert CRV Connected Sensors
Average / Maximum of Teamwork Sensors
Example: 72°F (22°C) Setpoint
Sensor
(one of 8)