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AB Industrietechnik srl – Via Julius Durst, 70 – 39042 BRESSANONE (BZ) Italy – Tel: +39 0472/830626 – [email protected] – www.industrietechnik.it
18. Humidity supply limits function
It is possible to take the humidity limits into account for the supply to avoid air that is too humid or too dry to enter into the room.
The low and high limits for humidity may be enabled separately, based on the value of the parameters
145
and
147
respectively.
The limit sensor is the humidity supply sensor. Pair it with the sensor input AI3 (
023
=6).
If no humidity supply sensor has been paired with an AI3 input sensor, the limit function is not taken into consideration.
•
Low dehumidification limit:
To enable the low limit of dehumidification set the following parameters:
- set the low limit control of humidity
145
=1,
- pair the supply sensor with the AI3 input:
023
=6 and put the JP1 jumper in the “3-2” position
- define the minimum limit setpoint
146
and the humidity limit proportional band
149
.
Low limit in dehumidification mode with modulating control:
Tlim
126
129
100
0
Val_lim_min_H
Tlim
128
129
100
0
Val_lim_max_H
Tlim
126
129
100
0
Val_lim_min_C
Tlim
128
129
100
0
Val_lim_max_C
Te
132
133
0
Set_comp_heat
131
134
Te
136
137
0
Set_comp_cool
135
138
Te
132
133
0
Set_comp_heat
131
134
Te
136
137
0
Set_comp_cool
135
138
Hlim
148
149
100
0
Lim_max_hum
Hlim
146
149
100
0
Lim_min_dehum
ON
OFF
Hlim
149
Lim_min_dehum
146
DOx
ON
OFF
Hlim
149
Lim_max_hum
148
DOx
Hlim: Limit supply humidity sensor
Lim_min_dehum.: theoretical value of the low limit output in dehumidification
146
: low limit humidity setpoint
149
: proportional band for humidity limit
If the supply humidity falls below the low limit humidity setpoint
146
, the modulating dehumidifier is controlled considering the
lowest value between the theoretical output of the dehumidification control and the theoretical value of the Lim_min_dehum
limit.
Below
146
the
icon is displayed and on the alarms page, the message
LILH
is displayed.
Low limit in dehumidification mode with on/off control:
Tlim
126
129
100
0
Val_lim_min_H
Tlim
128
129
100
0
Val_lim_max_H
Tlim
126
129
100
0
Val_lim_min_C
Tlim
128
129
100
0
Val_lim_max_C
Te
132
133
0
Set_comp_heat
131
134
Te
136
137
0
Set_comp_cool
135
138
Te
132
133
0
Set_comp_heat
131
134
Te
136
137
0
Set_comp_cool
135
138
Hlim
148
149
100
0
Lim_max_hum
Hlim
146
149
100
0
Lim_min_dehum
ON
OFF
Hlim
149
Lim_min_dehum
146
DOx
ON
OFF
Hlim
149
Lim_max_hum
148
DOx
Hlim: Limit supply humidity sensor
Lim_min_dehum.: theoretical value of the lower limit output in dehumidification
146
: low limit humidity setpoint
149
: proportional band for humidity limit
If the supply humidity falls below the low limit humidity setpoint
I46
-
(proportional band for humidity limit
I49
), the on/off
output in dehumidification mode is controlled considering the lowest value between the theoretical on/off value of the dehu
-
midification control and the theoretical value of the Lim_min_dehum limit.
Below
146
-
149
the
icon is displayed and on the alarms page, the message
LILH
is displayed.
