User manual

Operation
Liebert
®
iCOM
®
64
Contact your local Emerson representative for more information or to order the static pressure kit.
The Liebert iCOM control can accept a signal from a static pressure sensor connected to an available
analog input and powered from T2 to modulate the fan speed as part of the Optimized Aisle Control.
Figure 57 Static pressure sensor Liebert iCOM installation
Figure 58 Static pressure sensor placement
There are two modes of control that can be selected when using static pressure to modulate EC and
VFS fans with Optimized Aisle Control: limit and control. This selection can be made at S190 in the
Service Setpoints Menu. The limit control method modulates the fan to ensure that the static
pressure never falls below the static pressure setpoint, S191. If the static pressure is above the
setpoint the fan will not be ramped down. The control method modulates the fan to ensure the static
pressure setpoint is maintained. It will increase and decrease the fan speed to maintain the static
pressure setpoint.