Emerson Liebert iCOM Manual De Usuario

Low Limit 1 and Low Limit 2 are used to avoid overcooling a room during dehumidification. When a 

low limit is reached, a compressor or the liquid cooling source that is used for dehumidification is 

disabled. It is re-enabled when the air temperature rises. The Low Limit 1 and 2 settings are in the 

Service menu under Setpoints.
Low Limit 1: Low Limit 1 will disable one of two compressors for dehumidification. If only one 

compressor is set for dehumidification, or if the dehumidification source is chilled water, this limit 

will not be visible and will be inactive.
Low Limit 2: Low Limit 2 will disable both compressors for dehumidification. This limit will also 

stop dehumidification in single compressor units and in chilled water units.
The limits become active when the air temperature drops below a temperature value equal to the sum 

of the dehumidification reheat setpoint plus the value set on Low Limit 1 and 2 (the Low Limit 

settings are negative values).The air temperature used for low limit is the same sensor used for 

controlling reheat during dehumidification (left hand value on line S132). 
A dehumidification source is deactivated if the return air temperature drops below the Deactivation 

Temperature, as in this example:

Dehumidification will not reactivate until:

• the air temperature is above S132 Dehumidification Reheat Setpoint

OR

• at least one compressor is in a call for cooling, at least 10 minutes has elapsed since 

dehumidification was stopped and the Low Limit Sensor (S132) is greater than the Low Limit 2 

(LL2) border.

S132 Dehumidification 

Temperature Setpoint:

70°F (21.1°C)

Low Limit Value:

-7°F (-3.8°C)

Deactivation Temperature:

63°F (17.2°C)