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14.
Supply limits function with fixed-point control
For fixed point control it is possible to take the supply limits into account to prevent the release of air into the supply duct which
is too cold or too hot.
It is possible to enable the upper and lower limits separately in a given season based on the values of parameters
125
and
127
respectively.
The limit sensor is the supply sensor. Pair it with a sensor input
019
=2 (AI1) or
021
=2 (AI2) or
023
=2 (AI3).
If no supply sensor has been paired with an input sensor, the limit function is not taken into consideration.
• Minimum limit:
To enable the lower limits in cooling mode, set
125
=1.
To enable the lower limits in heating mode, set
125
=2.
To enable the lower limits in heating and cooling modes, set
125
=3.
To disable this function, set
125
=0.
Pair the supply with an input:
019
=1 for input AI1 or
021
=1 for input AI2 or
023
=1 for input AI3.
Low limit in heating 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
Val_lim_min_H: theoretical value of the low limit output in heating mode
Tlim: temperature of the supply sensor
126
: setpoint of low limit
129
: proportional limit band
When active, if the supply temperature falls below the minimum supply setpoint
126
, the heating valve is controlled considering
the highest value between the theoretical output of the heating control and the theoretical value of the Val_lim_min_H value.
Below
126
the
icon is displayed and on the alarms page, the message
LI-L
is displayed.
Low limit in heating mode with on-off control:
Speed
100%
152
Extractor fan
10V
Volt
ON
OFF
Tlim
129
Val_lim_max_H
128
126
Control temperature
Supply setpoint
128
118
107
126
Control temperature
Supply setpoint
128
118
108
126
Control temperature
Supply setpoint
128
118
109
ON
OFF
Tlim
129
Val_lim_min_H
126
150
153
151
Supply fan
Speed
100%
150
Extractor fan
10V
Volt
152
151
153
Supply fan
Speed 1
Ambient CO2
Fan
Speed 3
I56
I55
Outdoor temp
Setpoint offset
I34
I32
I35
I38
I39
I33
I36
I37
Supply temp.
OUTH
100%
HEATING
modulating
114
116
123
Supply
setpoint
COOLING
modulating
0%
Treg
HEATING
COOLING
100%
0%
Treg
122
124
WCS
100%
0%
Treg
OUT
124
WCS
114
AOx
DOx
DOx
126
Control temperature
Supply setpoint
128
118
Set_reg
Control temperature
HEATING
I24
COOLING
Set_comp
Speed 1
Humidity
Fan
Speed 3
I42
I41
AOx
ON
OFF
Tlim
129
Val_lim_max_C
128
ON
OFF
Tlim
129
Val_lim_min_C
126
DOx
DOx
OUT
WHS
WCS
Treg
HEATING
COOLING
109
I23
I23
OUTC
Supply temp.
OUTH
100%
Modulating
HEATING
114
123/2
Supply setpoint
0%
Supply temp.
100%
116
Supply setpoint
Modulating
COOLING
0%
OUTC
123/2
Val_lim_min_H: theoretical value of the low limit output in heating mode
Tlim: temperature of the supply sensor
126
: setpoint of low limit
129
: proportional limit band
When active, if the supply temperature falls below the minimum supply setpoint
126 -
(proportional band
129
), the on/off
output in heating mode is controlled considering the highest value between the theoretical on/off output of the heating control
and the theoretical value of the Val_lim_min_H limit.
Below
126
-
129
the
icon is displayed and on the alarms page, the message
LI-L
is displayed.