102/160
AB Industrietechnik srl – Via Julius Durst, 70 – 39042 BRESSANONE (BZ) Italy – Tel: +39 0472/830626 – [email protected] – www.industrietechnik.it
100%
0%
Treg
114
WHS
114
/2
100%
0%
Treg
116
WCS
116
/2
Treg
178
100%
0%
100%
0%
Treg
WCS
178
Treg
178
100%
0%
100%
0%
Treg
116
WCS
116
/2
178
Treg
178
100%
0%
P
Bypass
100%
0%
Treg
WCS
178
Treg
178
100%
0%
Bypass
P
Treg
178
100%
0%
100%
0%
Treg
WHS
Treg
178
100%
0%
178
100%
0%
Treg
114
WHS
114
/2
178
100%
0%
Treg
178
Bypass
100%
0%
Treg
WHS
178
100%
0%
Treg
178
Bypass
P
P
Bypass
Bypass
P
P
Treg: control temperature
WHS: heating operation setpoint
178
:
hysteresis regulation free heating/cooling
P: rotary on/off heat exchanger output
Bypass: bypass damper for heat exchanger output
With heating recovery conditions:
If temperature of regulation sensor drops below WHS, icon
is switched on, the rotary on/off heat exchanger is activated and
the on/off bypass damper is deactivated.
The rotary on/off heat exchanger is deactivated and bypass activated if Treg >= (WHS +
178
). The icon is switched off.
During operation, the ON or OFF icons indicate the status of the heat exchanger:
Icon status
Indication
ON icon is on
Rotary on/off heat exchanger running, heat recovery in progress
OFF icon is flashing
Rotary on/off heat exchanger stopped for free heating or free cooling
OFF icon is on
Rotary on/off heat exchanger stopped, heat exchanger off
By Modbus, it is also possible to see the status of the heat exchanger (see
“41. Modbus (for AHU-xMxSx1 models)” page 137
).
Note
:
Frost protection of heat exchanger is considered for rotary on/off heat exchanger. If a frost protection of heat exchanger
occurs, the rotary on/off heat exchanger is forced to run;
If parameter 1
86
≠ 1 and 3, on/off bypass is forced to OFF, modulating bypass is forced to minimum opening position defined
by parameter
164
.
If parameter
186
=1 or 3, on/off bypass is forced to ON, modulating bypass is forced to maximum opening position defined by
parameter
165
.
• Modulating rotary heat exchanger
:
To be able to operate, ventilation must be activated; otherwise, it is always disabled.
if a request of cooling/heating is present with cooling recovery/heating recovery conditions, the modulating rotary heat ex
-
changer modulates his speed from the minimum defined by parameter
183
to the maximum defined by parameter
184
If a on/off bypass damper is present, it is activated only if speed of rotary heat exchanger is 0.
The modulating bypass damper can’t be used for modulating rotary heat exchanger.
Operation with on/off bypass heat exchanger and cooling modulating valve:
Do following settings:
- set type of heat exchanger
012
=4
,
- select an analogue output for the modulating rotary heat exchanger
030
=12 (AO1) o
031
=12 (AO2) o
032
=12 (AO3),
- do the regulation on room sensor (internal or remote sensor)
001
=0;
- define the return air sensor
019
=1 (AI1) or
021
=1 (AI2) or
023
=1 (AI3)
-
define external sensor
019
=3 (AI1) or
021
=3 (AI2) or
023
=3 (AI3).
If return sensor or external sensor is broken (open or short-circuit), heat exchanger is deactivated.
- On/off bypass damper for heat exchanger
010
=2,
011
=1,
025
=13 (DO1) or
026
=13 (DO2) or
027
=13 (DO3) or
028
=13 (DO4)
or
029
=13 (DO5),
- modulating cooling valve
003
=1 and
030
=4 (AO1) or
031
=4 (AO2) or
032
=4 (AO3),
or modulating mixed-use cooling valve
002
=2
003
=1 and
030
=5 (AO1) or
031
=5 (AO2) or
032
=5 (AO3).
