Emerson Liebert iCOM Manual De Usuario

The user can define fail-safe sequences if communication with the BMS is lost. These sequences help 

ensure that the conditioned space is not compromised if communication between the BMS and the 

Liebert iCOM is lost. These fail-safe modes include:

• BMS Backup Temp Setpoint—Allows the unit to operate off a predefined temperature setpoint.
• BMS Backup Fan Operation—Sets the default operation for the fan speed control when a BMS 

time-out occurs. Four options are available:

• Disabled: The fan will continue controlling to the last value written by the BMS. This could be 

either the last fan temperature setpoint if controlling the fan by locally installed sensors or it 

could be the last value written fanspeed command (0-100%) hen fan control is set to manual.

• BMS Backup Spd: Allows the user to program a fixed fan speed percentage setpoint. When 

the

• BMS disconnect occurs, the fan speed will lock to this point. This setting is available when the 

fan control sensor is set to Manual.

• Coupled: Allows the fan speed to be controlled by the air temperature setpoint. The fan speed 

will follow the call for cooling as described in 3.1.1 - Unit/Fan Control.

• Backup Set: Allows the user to program an alternate fan setpoint that takes the place of S147 

Fan Setpoint and is used to establish a new fan control band.

• Restart at BMS Off and Disconnected—Allows the cooling unit to automatically turn On if the 

BMS has shut the unit Off and the BMS loses communication.

The Liebert Monitoring Points Generator assists in locating the exact monitoring points needed for a 

specific unit communicating using the Liebert IntelliSlot

®

 IS-UNITY-DP. Contact your local Emerson 

representative to have this run for your unit. Once this generation is run, it can be saved in various 

formats—.pdf, .xls or .csv—to be provided with the submittals, price quotations and to the BMS 

commissioning agent for point mapping.
The Monitoring Points Generator will not provide points for units connected to the Liebert SiteLink

®

. 

Each Liebert Site-Link panel is programmed based on specific job requirements so points may vary 

site to site. The Liebert SiteLink technician will provide a BMS points list after the panel has been 

setup. Contact the Customer Resolution Center at 1-800 LIEBERT (543-2378) with your site ID or tag 

number to obtain a points list or for assistance with Liebert SiteLink.