95/160
AB Industrietechnik srl – Via Julius Durst, 70 – 39042 BRESSANONE (BZ) Italy – Tel: +39 0472/830626 – [email protected] – www.industrietechnik.it
Operation with modulating bypass heat exchanger and on/off cooling valve:
Do following settings:
- set type of heat exchanger
012
=3
,
- select a digital output for the rotary on/off heat exchanger
025
=14 (DO1) or
026
=14 (DO2) or
027
=14 (DO3) or
028
=14 (DO4)
or
029
=14 (DO5)
- 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.
- Modulating bypass damper for heat exchanger
010
=4,
011
=1,
030
=13 (AO1) or
031
=13 (AO2) or
032
=13 (AO3).
- on/off cooling valve
003
=2 and
025
=5 (DO1) or
026
=5 (DO2) or
027
=5 (DO3) or
028
=5 (DO4) or
029
=5 (DO5),
or on/off mixed-use valve in cooling
002
=4,
003
=2 and
025
=6 (DO1) or
026
=6 (DO2) or
027
=6 (DO3) or
028
=6 (DO4) or
029
=6
(DO5).
100%
0%
Treg
122
WHS
122
/2
100%
0%
Treg
122
WCS
122
/2
Treg
178
100%
0%
100%
0%
Treg
122
WCS
122
/2
178
Treg
178
100%
0%
Bypass
100%
0%
Treg
WCS
178
Treg
178
100%
0%
Bypass
P
Treg
178
100%
0%
100%
0%
Treg
122
WHS
122
/2
178
100%
0%
Treg
178
Bypass
100%
0%
Treg
WHS
178
100%
0%
Treg
178
Bypass
P
P
P
Treg: control temperature
WCS: cooling operation setpoint
122
: hysteresis for on/off output
178
:
hysteresis regulation free heating/cooling
solid curve upper part: modulating bypass damper output
dashed curve: on/off cooling valve output
P: rotary on/off heat exchanger output
With cooling recovery conditions:
If temperature of regulation sensor rises above WCS, icon
is switched on, the rotary on/off heat exchanger is activated and
the modulating bypass damper goes from the maximum opening position (parameter
165
) to the minimum opening position
(parameter
164
) in the band defined by
122
/2. The cooling valve is activated if Treg > (WCS +
122
) and deactivated if Treg <=
(WCS +
122
/2).
The rotary on/off heat exchanger is deactivated if Treg <= (WCS -
178
). The icon is switched off.
Operation with modulating bypass heat exchanger without cooling valve:
Do following settings:
- set type of heat exchanger
012
=3
,
- select a digital output for the rotary on/off heat exchanger
025
=14 (DO1) or
026
=14 (DO2) or
027
=14 (DO3) or
028
=14 (DO4)
or
029
=14 (DO5)
- 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.
- Modulating bypass damper for heat exchanger
010
=4,
011
=1,
030
=13 (AO1) or
031
=13 (AO2) or
032
=13 (AO3).
