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AB Industrietechnik srl – Via Julius Durst, 70 – 39042 BRESSANONE (BZ) Italy – Tel: +39 0472/830626 – [email protected] – www.industrietechnik.it
17.
Humidification
Humidification can be carried out by using:
- an on/off humidifier,
- a modulating humidifier.
Humidity can be controlled using the humidity sensor inside the controller (AHU-xxxxH1 models only) or using a remote
humidity transmitter with output 0..10 V connected to input AI3 (
023
=6). The presence of a one or more speeds on/off fan or a
modulating supply fan is mandatory, otherwise humidification is not authorized.
•
Using a modulating humidifier:
The humidification signal is calculated based on the curve indicated below:
H
142
143
100
0
% dehum
CO
2
167
168
165
0
Val_damper
164
141
/ 2
H
100
0
142
% hum
141
/ 2
143
H
142
143
100
0
% dehum
141
/ 2
H
100
0
142
% hum
141
/ 2
143
WDS
WDS
WUS
WUS
H: value of the humidity detected by the internal or remote humidity sensor
WUS: humidifying operation setpoint
% hum: theoretical value percentage of humidification
142
: humidity setpoint
141
: humidity neutral zone
143
: humidity proportional band
Settings for humidification with modulating humidifier:
- select the type of modulating humidifier
006
=1,
- define the modulating humidifier output
030
=10 or
031
=10 or
032
=10,
- turn on humidification
- with an internal humidity sensor
140
=1 (AHU-xxxxH1 models only)
- or with a remote humidity sensor
140
=2,
023
=6 (0..10 V humidity input) and put the JP1 jumper in the “3-2” position,
- humidity neutral zone
141
,
- humidity setpoint
142
,
- humidity proportional band
143
,
- humidity integral time
144
.
Control is carried out on the humidification operating setpoint WUS =
142
- (
141
/2) and is proportional if
144
=0 or proportional
integral if
144
≠0.
When the signal applied to the humidifier is not equal to 0, the
icon is displayed.
Note: If the frost protection (with
188
=1), condensation alarm or steady ventilation are activated, humidification is shut down.
