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15. Control with setpoint compensation
The compensated setpoint allows an operating setpoint to be dynamically calculated according to the external temperature.
In winter, it is normally used to raise the supply setpoint, when the external temperature falls.
In summer, it can calculate a room setpoint based on the external temperature to avoid having a large temperature difference
between the cooled internal environment and the external one.
To use the setpoint compensation, select:
- the operating mode
014
=1 (2-pipe control with external compensation) or
014
=4 (4-pipe control with external compensation),
- type of compensation:
030
=1 for compensation in cooling mode,
030
=2 for compensation in heating mode,
030
=3 for compensation in heating and cooling modes,
- a sensor input to connect the external sensor:
019
=3 for input AI1 or
021
=3 for input AI2 or
023
=3 for input AI3.
• Compensation in 2-pipe heating mode or 4-pipe mode:
Two separate points are defined, as indicated in the charts below
Example of compensation curve with
133
>
134
.
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
Set_comp_heat: winter compensated setpoint
Te: external temperature
131
:
minimum external temperature for winter compensation
132
:
maximum external temperature for winter compensation
133
:
compensated setpoint corresponding to the minimum external temperature for winter compensation
131
134
:
compensated setpoint corresponding to the maximum external temperature for winter compensation
132
Example of compensation curve with
133
<
134
.
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
Set_comp_heat: winter compensated setpoint
Te: external temperature
131
:
minimum external temperature for winter compensation
132
:
maximum external temperature for winter compensation
133
:
compensated setpoint corresponding to the minimum external temperature for winter compensation
131
134
:
compensated setpoint corresponding to the maximum external temperature for winter compensation
132
Note: If the external sensor breaks, the compensated setpoint is still calculated.
If the external sensor is open, the compensated setpoint corresponds to
I33
.
If the external sensor is short-circuited, the compensated setpoint corresponds to
I34
.