25/160
AB Industrietechnik srl – Via Julius Durst, 70 – 39042 BRESSANONE (BZ) Italy – Tel: +39 0472/830626 – [email protected] – www.industrietechnik.it
• 4-pipe controller (
014
=3 or 4)
In 4-pipe mode, the operating season is automatically selected based on the room temperature, the 4-pipe room setpoint
109
if
014
=3 or the calculated winter compensation setpoint if
014
=4 and
130
=2 or 3, the neutral zone
123
.
Based on the controller selection, 2 setpoints are calculated:
if
014
=3:
- WHS = heating setpoint =
109
- (
123
/2)
- WCS = cooling setpoint =
109
+ (
123
/2)
if
014
=4:
- WHS = calculated winter compensated setpoint - (
123
/2)
- WCS = calculated winter compensated se (
123
/2)
If the temperature rises above WCS, the operating season is considered to be cooling and the “
COOL”
icon is displayed.
If the temperature falls below WHS, the operating season is considered to be heating and the “
HEAT”
icon is displayed.
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
Note: When the unit is turned on, if the temperature Treg is in the neutral zone, the season is considered to be heating.
The mid-season activation parameter
013
has no influence on the 4-pipe controller and is not taken into consideration.
Modulating heating and cooling control:
• The PI type controller operates in the following way for modulating control:
Control
heating
Control
cooling
Control
4 pipe
Control
heating
on/off
Treg
114
100%
0
Treg
100%
0
116
100%
0
Treg
123
114
116
ON
0FF
Treg
122
WHS
WCS
WHS
100%
0
Treg
I24
I14
I16
Set_comp
100%
0
Treg
I22
SetC
OUT
OUT
OUT
OUT
OUT
Control
cooling
on/off
ON
0FF
Treg
122
WCS
OUT
WHS
WCS
ON
0FF
Treg
122
WHS
122
WCS
123
100%
0
Treg
123
114
122
WHS
WCS
ON
0FF
Treg
122
WHS
116
WCS
123
0FF
ON
100%
0
OUTH
OUTC
OUTH
OUTC
OUTH
OUTC
OUTH
OUTC
Treg: control sensor
WHS = calculated heating setpoint
WCS = calculated cooling setpoint
123
:
neutral zone
114
:
proportional heating band.
116
:
proportional cooling band.
OUTH: modulating heating output:
-
modulating valve if
002
=2 and
030
=3 (AO1) or
031
=3 (AO2) or
032
=3 (AO3).
-
modulating electrical resistance if
002
=1 and
030
=6 (AO1) or
031
=6 (AO2) or
032
=6 (AO3).
OUTC: modulating cooling output:
-
modulating valve if
003
=1 and
030
=4 (AO1) or
031
=4 (AO2) or
032
=4 (AO3).
If the operating temperature drops below
WHS
, the heating valve starts to open or the modulating electrical resistance
starts to be modulated. The icon is displayed if a valve is controlled, the
icon for modulating eletrical resistance.
The valve or electrical resistance element can be controlled with PI action if the integral heating time
115
does not equal 0
or, with proportional action only if
115
=0.
The
(or
) icon switches off if the heating or modulating valve (or the electrical resistance) closes (or is no longer
powered) when Treg >= WHS.
