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
20. Free cooling/heating conditions
Free cooling and/or heating operation allows you to cool or heat while saving energy, by means of a damper, when environ -
mental conditions are favourable in case of cooling or heating request.
• Free cooling conditions:
Set the following parameters:
-
170
=1 or 3 (enabling of free cooling operation indipendently of working season) or
170
=4 or 6 (enabling of free cooling opera-
tion only in cooling mode).
- do regulation based on the room sensor (internal or remote)
001
=0;
if a remote room sensor is used, set an analogue input as a remote sensor
019
=1 (AI1) or
021
=1 (AI2)
023
=1 (AI3),
- configure an analogue input as an external sensor
019
=3 (AI1) or
021
=3 (AI2) or
023
=3 (AI3),
- select a controlled damper
010
≠0,
- control the selected damper on free cooling
011
=1 or 2,
Treg - Text
ON
OFF
Text - Treg
Bypass
172
171
ON
OFF
Bypass
172
171
Treg - Text
ON
OFF
Text - Treg
Free heating
conditions
172
171
ON
OFF
Free cooling
conditions
172
171
Treg: room control or return temperature
Text: external temperature
171
: setpoint differential for free cooling/heating
172
: proportional band for free cooling/heating
In order to be able to have the free cooling conditions, the following 4 conditions must be checked
Text >=
174
Treg >=
175
(Treg - Text) <
173
(Treg - Text) >
171
If (Treg - Text) <=
171
-
172
now the free cooling conditions are OFF.
• Free heating conditions:
In order to have the free heating conditions, the following parameters must be set:
-
170
=2 or 3 (enabling of free heating operation indipendently of working season) or
170
=5 or 6 (enabling of free heating op -
eration only in heating mode)
- do regulation based on the room sensor (internal or remote)
001
=0;
in the case of a remote room sensor, set an analogue input as a remote sensor
019
=1 (AI1) or
021
=1 (AI2)
023
=1 (AI3),
- configure an analogue input as an external sensor
019
=3 (AI1) or
021
=3 (AI2) or
023
=3 (AI3),
- select a controlled damper
010
≠0,
- control the selected damper on free heating
011
=1 or 2.
Treg - Text
ON
OFF
Text - Treg
Bypass
172
171
ON
OFF
Bypass
172
171
Treg - Text
ON
OFF
Text - Treg
Free heating
conditions
172
171
ON
OFF
Free cooling
conditions
172
171
Treg: room control or return temperature
Text: external temperature
171
: setpoint differential for free cooling/heating