industrie technik evolution AHU-XXXSX1 series, User Manual

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AB Industrietechnik srl – Via Julius Durst, 70 – 39042 BRESSANONE (BZ) Italy – Tel: +39 0472/830626 – info@industrietechnik.it – www.industrietechnik.it
If Treg < ( WHS -
122
), the heating valve (or electrical resistance) is activated. The (or ) icon is displayed.
If Treg >= WHS, the heating valve (or electrical resistance) is disabled. The (or ) icon is switched off.
If Treg > ( WCS +
122
), the cooling valve is activated. The icon is displayed.
If Treg <= WCS, the cooling valve is deactivated and the icon is switched off.
Controlling modulating heating and cooling on/off:
• 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
122
: hysteresis for on/off output.
116
: proportional cooling band
OUTH: heating output on/off:
-
on/off valve if
002
=
4 and
025
=4 (DO1) or
026
=4 (DO2) or
027
=4 (DO3) or
028
=4 (DO4) or
029
=4 (DO5).
-
electrical resistance on/off if
002
=
3
,
025
=7 (DO1) or
026
=7 (DO2) or
027
=7 (DO3) or
028
=7 (DO4) or
029
=7 (DO5)
OUTC: modulating output:
- modulating valve if
003
= 1 and
030
=4 (AO1) or
031
=4 (AO2) or
032
=4 (AO3).
If Treg < ( WHS -
122
), the heating valve (or electrical resistance) is activated. The (or ) icon is displayed.
If Treg >= WHS, the heating valve (or electrical resistance) is disabled. The (or ) icon is switched off.
If the operating temperature rises above WCS , the modulating cooling valve starts to open. The icon is displayed.
The cooling valve can be controlled with PI action if the integral time
117
does not equal 0, or with proportional action only
if
117
=0.
The icon switches off if the cooling valve closes.