79/160
AB Industrietechnik srl – Via Julius Durst, 70 – 39042 BRESSANONE (BZ) Italy – Tel: +39 0472/830626 – [email protected] – www.industrietechnik.it
Regulation of on/off damper based on free cooling/heating and CO
2
The regulation corresponds to paragraph
“Regulation of on/off damper based on air quality” page 78
for CO
2
part and to
paragraph
“Regulation of on/off damper based on free cooling/heating” page 78
for free cooling/heating part.
The external on/off regulated damper is activated if one of the previous paragraphs would activate the output.
The external on/off regulated damper is deactivated if none of the previous two paragraphs would activates the output.
Regulation of on/off damper based on dehumidification
It can be used in rooms with humidity that is ALWAYS higher than external humidity (overcrowded places, health farms, sauna,
swimming pools, ...) or in winter when external humidity is ALWAYS lower than internal humidity. An external on/off damper
can be used for such a situation.
To use this function set following parameters:
set parameter
139
to activate dehumidification:
139
=1 or
139
=3 (in cooling only) with built-in humidity sensor (models AH-xxxSH1 only),
139
=2 or
139
=4 (in cooling only) with a remote 0..10V humidity transmitter. Set
023
=6 (input 0..10V humidity) and position
jumper JP1 on position “2-3“, then input sensor AI3 is set for 0..10V input transmitter, the corresponding range is set to 0..100
%r.H. (
206
=0 and
207
=100) with unit set to %r,H. (
208
=1),
select the type of regulated damper
010
=1 (external regulated on/off damper),
select the type of regulation applied to damper
011
=3 (dehumidification),
define which digital output is the external regulated on/off damper
025
=11 (DO1) or
026
=11 (DO2) or
027
=11 (DO3) or
028
=11
(DO4) or
029
=11 (DO5),
define regulation parameters for dehumidification (
141
: neutral zone humidity,
142
: humidity setpoint,
143
: proportional band
humidity).
The external regulated on/off damper as indicated below.
H
WDS
143
0
Val_damper
142
141
/2
Val_damper: theoretical value of the damper control
WDS: dehumidification working setpoint
142
: setpoint of humidity
141
: neutral zone humidity
143
: proportional band humidity
If value of humidity > WDS, the external regulated damper is activated and icon
is activated.
If value of humidity <= (WDS - banda proporzionale
143
), the external regulated damper is deactivated and icon
is deac-
tivated.
Note: If the frost protection alarm is activated (and
188
=1) or if the appliance is switched off or if ventilation is absent, the on/
off damper is deactivated.
