Emerson Liebert iCOM Manual De Usuario

There are two types of infrared humidifiers: small pan (IFS) and large pan (IFL). The operating mode 

of each is similar, however, some of the variables or timings differ because of the size of the pan.
Infrared humidifiers are started at 100% humidification request and stopped at 0%. Infrared 

humidifiers cannot be driven in proportional mode.

An autoflush system automatically controls a water makeup valve to maintain proper levels in the 

infrared humidifier water pan during humidifier operation. If humidification is needed and 15 hours 

have elapsed since the last time the humidifier was on, then the humidifier is not turned On until the 

valve completes an initial fill of the humidifier pan. This pre-fill is about 30 seconds for a small pan 

and 60 seconds for a large pan. The valve continues to fill and flush the pan for about 4-1/2 minutes 

for a small pan or 7-1/2 minutes for a large pan. Pan size is selected based on unit specifications and 

the time is factory-set.
During humidifier operation, with the flush rate set at the default of 150%, the valve is opened 

periodically to add water to the pan (for a small pan, it opens about 45 seconds for every 7 minutes of 

humidifier operation; for a large pan it opens about 80 seconds for every 10 minutes of operation). 

This adds enough water to the pan to cause about a third of the total water used to be flushed out of 

the overflow standpipe in the humidifier pan. This helps to remove solids from the pan. The flush rate 

is adjustable from 110% to 500% in 10% increments. Default is 150%. If the water quality is poor, it 

may be desirable to increase the water flushing action above the normal 150% rate. Also, if the supply 

water pressure is low, the flush rate adjustment can be increased so that a sufficient water level is 

maintained during humidification. The flush rate parameter, Infrared Flush Rate (Service Menu, 

Options Setup), is adjustable from 110%-500% because the fill valve is controlled by time. It uses a 

factory-installed integral float to prevent overfilling if the humidifier drain or condensate pump fails.
External Humidifier Control—Optional
A factory-supplied option may be provided to allow a start-stop command to be sent to the control of a 

remote-mounted humidifier.

The Steam Generating Humidifier has its own separate control board that manages the canister and 

steam rate. Liebert iCOM sends an On-Off command to relay a call for humidification.

The Dehumidification Enable parameter (Service Menu, Options Setup) allows for enabling/disabling 

the dehumidification function.
A call for dehumidification is calculated in the same way as a cooling request. The components 

(valves, compressors) will follow this dehumidification request as soon as it is higher than the request 

for cooling the hot gas bypass (if equipped) will disengage on the Liebert Challenger 3000

™

.

Humidity in Last xx Hours

15 hours

15 hours

15 hours

Fill Time

33 seconds

56 seconds

27 seconds

Humidifier On Time

440 seconds

576 seconds

568 seconds

Flush Rate

150%

150%

150%