Operation in Teamwork Mode
135 Liebert
®
CRV
™
Figure 120 Teamwork modes and sensor management
12.4.1 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) (works
well for most applications)
• Teamwork Mode 3: Optimized Aisle (allows the cooling capacity to be controlled off the 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. The supply temperature setpoint can be adjusted for each
unit. This allows optimal control for an unbalanced room load. The fan speed is controlled by the
remote rack sensors of all units, providing a controlled delivery method of the air to the cold aisle.
This distribution is achieved by operating all fans in parallel, which will also yield the greatest
energy efficiency.
All units in the same group will run in the same Teamwork Mode.
12.4.2 No Teamwork
Each cooling unit works independently, responding to its own sensors.
Standby function and unit rotation are possible but cascading is not (see Standby and Cascade on
page 138). AutoSet will not adjust the proportional band in this mode.
Liebert CRV 1
Max = 72°F (22°C)
Liebert CRV 2
Max = 76°F (24°C)
Liebert
CRV 1
Liebert
CRV 2
Equipment
Rack
Equipment
Rack
Equipment
Rack
Equipment
Rack
Equipment
Rack
Equipment
Rack
Equipment
Rack
Equipment
Rack
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)
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