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Access 4.x |
Dehumidification (Separate dehumidification unit) |
Access can control a single stage dehumidifier. The dehumidification is PID regulated to reduce the relative humidity in the room (or extract air) to the setpoint value. An analog output is used to control a dehumidifier. The output will increase on increasing room (or extract air) humidity. A digital output can also be used to start a dehumidifier.
note: this dehumidification can't be used in combination with humidification - sequence override should be used instead.
Configuration example of the dehumidification (control of a separate dehumidification unit) |
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Variable |
Available options & Selection |
Note |
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Activate Humidity control |
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Configuration > Functions > Function activation |
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Humidity control |
... | Dehumidification |… |
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Configure function |
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Configuration > Functions > Humidity control |
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Humidity control |
Dehumidification |
Indication of what function has been activated |
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Select sequence for dehumidify |
| None | … |
Option used in case of sequence override dehumidification |
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Type of output |
| Analog | Step | Analog + Step | |
| Analog | - 0..10V signal for capacity |Step| - relay output for start/stop |
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PID Settings |
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Configuration > PID controllers > Dehumidification |
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P-band |
[100] %RH |
PID settings to describe responsiveness of the dehumidifier |
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I-time |
[300] s |
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D-time |
[0] s |
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PID output max limit |
[100] % |
Max output of the PID can be limited |
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Hardwired interface |
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Configuration > I/O allocation settings > |
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Analog inputs > Humidity room/extract air |
Any available I/O |
Mandatory - humidity sensor for reference |
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Digital outputs > Humidity control start |
Interface to the dehumidifier |
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Analog outputs > Humidity control |
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Operational settings |
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Data & Settings > Humidity control |
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Humidity room/extract air |
__ % |
Actual measured RH |
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Setpoint humidity room/extract |
[50] %RH |
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Digital output start point |
[15] % |
DO (Humidity control start) is activated once AO (Humidity control) exceeds 15% |
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Digital output stop point |
[5] % |
DO (Humidity control start) is deactivated once AO (Humidity control) falls bellow 5% |
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Operation overview |
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Data & Settings > Operation overview > Humidity |
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Humidity room/extract air |
__ % |
Overview of the function in action |
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Setpoint humidity room/extract |
[50] %RH |
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Humidity control |
__ % |
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Humidity control start |
Off | On |
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Humidity control mode |
Not active | Dehumidification |
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