Setting Manual Fan Speed Control via BMS
1. Touch , then > Setpoints > Fan Control, set Fan Control Type to Manual, then touch Save.
2. Touch , then > BMS & Teamwork Setup > BMS Setup.
3. On BMS SETUP, touch Control Settings. The CONTROL SETTINGS secondary panel displays:
• In Fan Control Sensor, select Manual.
• In BMS Fan Speed Local Override, select No.
• Touch Save. BMS control of fan speed is set, and the BMS set fan speed is displayed on the Fan Speed
slider.
BMS Backup Fan Speed
Sets a fan speed % the unit shall ramp fanspeed at in the event of a BMS timeout. The end-user may select one of the
following options for operation:
• Disabled - There is no reaction when BMS is disconnected. Unit shall remain as is.
• BMS Backup Spd - Fanspeed shall change to setting defined by parameter S162 BMS Backup Fanspeed when
the BMS is disconnected.
• Coupled - Links the call for fanspeed percentage (%) to the call for cooling percentage (%). The fan shall still
ramp between the minimum percentage and the STD speed percentage (MAX), still respecting the airflow
calibration.
• BMS Backup Set - When configured, the current fan setpoint used for control (S147 Fan Setpoint) shall be
replaced by value configured by Liebert® iCOM™ parameter S162 BMS Backup Fan Setpoint.
• SP Control - S146 Fan Control Sensor shall change back from Manual to Return and the static pressure related to
the fan speed starts at the most recent BMS manual speed, eventually controlling to that speed.
The BMS timer must be configured for this setting to activate.
NOTE: Set the fan speed via BMS by writing to the "Fan Speed Maximum Setpoint" monitoring point. For details, see
SL-28170 IntelliSlot Reference Guide found at https://www.vertiv.com/en-us/support/.
NOTE: Local adjustments to fan speed are overridden when remote/BMS fan speed control is set.
3 Service Operation
46
Vertiv™ Liebert® iCOM™Installer/User Guide
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