Manual code 75803707A.0708
Page 40 of 64
7.3 HUMIDITY CONTROL
Humidification control action is effected proportionally by way of the following components:
• Integrated immersed electrode humidifier
• External humidifier (not supplied by TECNAIR LV)
Proportional control provides a modulating effect on the quantity of steam produced, which in the case of the
integrated humidifier ranges from to 8 to 100% of the total production, for both types of microprocessor control.
Dehumidification control is effected by a startup/opening step of the cold component with activation at the limit
of the proportional control band. Once the component has been activated, the control proceeds by regulating the cooling
capacity, in the case of the hot gas bypass or water chilled coil, up to the set-point.
The cooling capacity is never reduced below 60% of the total to allow the effect of dehumidification.
The figure illustrates the system described above:
7.3.1 DIRECT EXPANSION AIR CONDITIONERS
• AIR CONDITIONER WITH A SINGLE COMPRESSOR
• AIR CONDITIONER WITH TWO COMPRESSORS
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