Emerson Liebert iCOM Manual De Usuario

How many degrees the supply temperature will be lowered while supply compensation is invoked 

depends on how many degrees the fan controlling temperature has exceeded the control band 

compared to S116 Supply Compensation Value.

Example: With a Fan Setpoint of 70ºF and Proportional band of 10ºF, 0ºF deadband, the fan 

speed is 100% when the rack temperature is 75ºF. If S116 Supply Compensation value = 10ºF, the 

supply air temperature will lower one degree for every degree the rack temperature increases 

outside the fan control band. This means if the air temperature setpoint is 65ºF, and the rack 

temperature increase to 77ºF, the supply air temperature will lower to 63ºF.

Return + Supply Compensation: This selection provides the ability to enable both supply and 

return compensation settings as described above.

76

78

74

73

72

100%

Compensation

50%

Compensation

Blower at 100% 

of Capacity

Blower Proportional Band

Fan Speed Proportional

Band 8°F (4°C)

Supply Temperature Setpoint 
will be decreased by the Supply 
Compensation band when the 
fan speed proportional band 
has doubled