Infrared Humidification – With Dead Band; Autoflush Control For Infrared Large (Ifl) Or Small (Ifs) Pans - Emerson Liebert iCOM Training And Service Manual
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Infrared Humidification – With Dead Band
In the above example that the control band begins at the 50% humidity setpoint
plus ½ of the programmed dead band value plus ½ of the programmed humidity
proportional band value.
As the return air humidity decreases the infrared humidifier is activated at 45.5%
RH or ½ of the dead band value plus 100% of the humidification control band.
When the return air humidity starts to increase, the infrared humidifier is
deactivated at 49.5% RH or ½ of the dead band value plus 0% of the
humidification control band.
Autoflush Control for Infrared Large (IFL) or Small (IFS) Pans
The Autoflush Water-Level Control software program is an integral part of the
infrared humidifier system. The program automatically controls a water makeup
valve to maintain the proper water level in the humidifier pan during operation.
When a call for humidification exists, the program performs a series of checks.
The first check to see how long the infrared humidifier has been off; if the off time
is equal to or greater than the programmed value (factory default is 15 hours), it is
assumed that the pan is dry and a program called pre-fill is initiated to add water to
the pan. During the pre-fill operation the infrared lamps are inactive. The pre-fill
time is programmable with an adjustable range of 1 to 120 seconds for either pan
size. The factory default for a large (IFL) pan is 57 seconds and for a small (IFS)
pan is 34 seconds.
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