Liebert iCOM Microprocessor TM-10098 Uživatelský manuál stáhnout pdf (Strana 33)

iCOM

Controls Training and Service Manual

The humidity controller activates the first stage of dehumidification operation when

the return air humidity level increases to 50% of the humidity proportional band.

The second stage of dehumidification is activated when the return air humidity

level increases to 100% of the humidity proportional band.

The humidity controller deactivates the second stage of dehumidification operation

when the return air humidity level decreases to 50% of the humidity proportional

control band value. The first stage of dehumidification is deactivated when the

return air humidity level decreases to the humidity set point of 50% or 0% of the

humidity proportional band.

If the compressors have unloading capability (4-stage cooling), then the

compressors are activated in the fully loaded condition for each stage of

dehumidification.

2 Stage Compressorized Dehumidification – No Dead Band

Humid Set Point: 50%

Proportional Band: 8%

50 51 52 53 54 55

Increasing Humidity

Dehumid

Stage 2 Off

Humidity Set Point + (1/2 Proportional Band)

Dehumid

Stage 1 Off

Dehumid

Stage 1 On

Dehumid

Stage 2 On

Note: in the above example that the control band begins at the 50% humidity set

point and has a length of 4%, which is ½ of the programmed humidity proportional

band value.

As the return air humidity level increases, first stage dehumidification operation is

activated at 52%RH or 50% of the dehumidification control band. If the return air

humidity level continues to increase the second dehumidification stage actives at

54%RH, which 100% of the dehumidification control band.

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Liebert iCOM Microprocessor TM-10098 Uživatelský manuál Strana 33