86/160
AB Industrietechnik srl – Via Julius Durst, 70 – 39042 BRESSANONE (BZ) Italy – Tel: +39 0472/830626 – [email protected] – www.industrietechnik.it
• Double battery heat exchanger:
The double battery heat exchanger is activated by a fluid circulation pump placed between the two batteries.
If a cooling/heating request is present and conditions of recovery are satisfied, the pump is activated.
If a bypass damper is present it operates opposed to the pump.
If a modulating bypass damper is present, the damper modulates the recovery based on cooling / heating request.
Operation with modulating bypass heat exchanger and modulating cooling valve:
Do following settings:
- set type of heat exchanger
012
=2
,
- select a digital output for the pump
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).
- 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).
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
WCS: cooling operation setpoint
116
: cooling proportional band
178
:
hysteresis regulation free heating/cooling
solid curve upper part: modulating bypass damper output
dashed curve: modulating cooling valve output
P: pump of double coil heat exchanger output
With cooling recovery conditions:
If temperature of regulation sensor rises above WCS, icon
is switched on, the pump 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
116
/2. The cooling valve goes from closed position to open position when Treg changes from (WCS +
116
/2)
to (WCS +
116
).
The pump is deactivated if Treg <= (WCS -
178
). The icon is switched off.
Operation with modulating bypass heat exchanger and on/off cooling valve:
Do following settings:
- set type of heat exchanger
012
=2
,
- select a digital output for the pump
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).
