Emerson 3000/ITR Manuel D’Utilisation

The performance of all control circuits can be tested by actuating each of the main functions. This is 

done by temporarily changing the setpoints.

To test the cooling function, set the setpoint for a temperature of 10°F (5°C) below room temperature. 

A call for cooling should be seen and the equipment should begin to cool. A high temperature alarm 

may come On. Disregard it. Return setpoint to the desired temperature.

Reheat may be tested by setting the setpoint for 10°F (5°C) above room temperature. A call for heat-

ing should be seen and the heating coils should begin to heat. Disregard the temperature alarm and 

return the setpoint to the desired temperature.

To check humidification, set the humidity setpoint for an RH 10% above the room humidity reading. 

For infrared humidifiers, the infrared element should come On. Steam generating humidifiers should 

click immediately as it energizes. After a short delay, the canister will fill with water. The water will 

heat and steam will be produced. Return the humidity setpoint to the desired humidity.

Dehumidification can be checked by setting the humidity setpoint for an RH 10% below room relative 

humidity. The compressor should come On. Return humidity setpoint to the desired humidity.

The electric panel should be inspected for any loose electrical connections.

Risk of electric shock. Can cause injury or death.
The Liebert iCOM microprocessor does not isolate power from the unit, even in the “Unit Off” 

mode. Some internal components require and receive power even during the “Unit Off” mode 

of Liebert iCOM control.
The only way to ensure that there is NO voltage inside the unit is to install and open a remote 

disconnect switch. Refer to unit electrical schematic.
Be sure that all power has been disconnected from the unit before attempting to tighten any 

fittings or connections.