Emerson Liebert iCOM Manual De Usuario

Two supply and two return chilled water temperature sensors may be added per unit for local and 

remote monitoring of water temperature differential temperature. Temperature is monitored with 2T 

sensors (two sensors on dual circuit units).
The first step in setting up the additional supply sensors is to program the DIP switches using 

Table 5 below. The DIP switches may be access by removing the rear housing or through the precut 

hole in the housing. See Figure 69 for additional information.

After setting the DIP switches, see 4.3.3 - Terminate the Final Sensor on the CANbus Link to 

complete the sensor installation.
Once the sensors have been connected, go to Service Menus> Sensor Calibration/Setup (Figure 149). 

Locate the line that reads Chilled Water Sensor Type. Change the right hand parameter to 2T or Dual 

2T. Verify the fluid inlet and outlet temperature readings with a field-supplied temperature sensor. 

Compare the values measured with the meter and calibrate the temperatures as needed. Use the CW 

Temp Sensor C1 / C2 Placement feature to swap the inlet and outlet temperatures shown in the 

Liebert iCOM if the sensor probes are reading backward when measured with a field-supplied meter. 

(Supply in the Liebert iCOM represents the actual return or vise versa). 

Fluid flow meters are available for monitoring fluid flow in 

gallons per minute or liters per minute. When the flow meter is 

coupled with fluid temperature sensors, Liebert iCOM will 

calculate real time cooling capacity in kW or kBTU/Hr. Unit flow 

rate and capacity may be hidden or shown from the unit view and 

monitored through the Liebert IntelliSlot Unity Card. Contact 

your local Emerson representative to obtain a flow meter.

The temperature control parameters are in Service > Setpoints. The Temperature Setpoint parameter 

is in both the User Menu and Service Menu under Setpoints.
The Liebert iCOM has two temperature control types:

• Proportional
• PI
• Intelligent (chilled water models only)

Each control type affects the timing and intensity of the cooling/heating operations. The Control Type 

parameter is in Service>Setpoints.

Fluid Circuit 1

30

Off

On

On

On

On

Off

Off

Off

Fluid Circuit 2

31

On

On

On

On

On

Off

Off

Off

Circuit 1 and 2 fluid sensors are dual purpose CANbus ID’s in software. These sensors also may be used for supply temperature 
monitoring of the conditioned space. Before considering installing fluid sensors, verify that the 2T supply sensors are not being 
used. See the Service Menus, Sensor calibration, page 11 of 12 for more information. Adding duplicate sensors will result in 
sensor communication loss.