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AB Industrietechnik srl – Via Julius Durst, 70 – 39042 BRESSANONE (BZ) Italy – Tel: +39 0472/830626 – [email protected] – www.industrietechnik.it
•
Using an on/off dehumidifier:
The dehumidification 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
WDS: dehumidification mode setpoint
% dehum.: theoretical value percentage of dehumidification
142
: humidity setpoint
141
: humidity neutral zone
143
: humidity proportional band
Settings for dehumidification with on/off dehumidifier:
- select the type of dehumidification with the on/off dehumidifier
007
=2,
- define the on/off dehumidifier output
025
=17 (DO1) or
026
=17 (DO2) or
027
=17 (DO3) or
028
=17 (DO4) or
029
=17 (DO5),
- turn on dehumidification
- with an internal humidity sensor
139
=1 or
139
=3 only in cooling (AHU-xxxxH1 models only)
- or with a remote humidity sensor
139
=2 or
139
=4 only in cooling,
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
.
Control is carried out on the dehumidification operating setpoint WDS =
142
+ (
141
/2).
If the humidity detected > WDS +
143
the dehumidifier is activated, and the
icon is displayed.
If the humidity detected <= WDS the dehumidifier is disabled and the
icon switches off.
Note: If the frost protection (with
188
=1), condensation alarm or steady ventilation are activated, dehumidification is shut down.
•
Using an external damper regulated on dehumidification:
See chapter
“Regulation of modulating damper based on dehumidification” page 82
•
Using a modulating fan regulated on dehumidification:
See chapter
”22. Operating mode of the fans” page 68
paragraph “Regulation of speed based on dehumidification (009=7)”.
