Vertiv Liebert iCOM - 8.1.3 Setting BMS Backup Setpoints

Fan Control Sensor
Currently-selected fan control sensor. Must be set to Manual for BMS control. See Configuring Fan Setpoints on
page43 .
Monitoring Handshake
Sets a time period, in minutes, in which communication between the BMS and Vertiv™ Liebert® iCOM™ must occur.
Maximum Fan Speed
Current fan speed setting (set via fan setpoints or by BMS).
8.1.3 Setting BMS Backup Setpoints
1. Touch , then > BMS & Teamwork > BMS Setup > Configure Timeout button on the lower-right of the
panel. The CONFIGURE TIMEOUT secondary panel opens.
2. Adjust the values, and touch Save. The settings are configured.
NOTE: Depending on the type of thermal management unit, included components, and control settings of your system,
all of the options listed may not be available on your Vertiv™ Liebert® iCOM™ display.
BMS Timeout Settings Options
BMS Backup Fan Operation
Enables/disables BMS operation of the fans during back up operation. Options are:
• 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.
BMS Backup Temp Setpoint
Temperature that the cooling unit maintains during BMS back up operation.
8 External Monitoring andBuilding ManagementSystems
119
Vertiv™ Liebert® iCOM™Installer/User Guide