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Access 4.x |
Exhaust damper (Open/Closed) |
The straightforward use of the Exhaust air damper is to shut close the exhaust air duct while the AHU is stopped or in recirculation mode.
Closing of the damper can be delayed while stopping the Extract air fan. This prevents under-pressure and possible damage to the ductwork created by the de-energized but still free-spinning fan.
The exhaust air damper can be changed for or backed-up with the damper on the extract side of the AHU. The placement of the damper in the flowchart can be altered accordingly.
Configuration of the Exhaust\Extract air damper |
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Variable |
Available options & Selection |
Note |
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Activate function |
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Configuration > Functions > Function activation > |
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Damper |
| No | | Outdoor air | | Outdoor air + Exhaust air | | Exhaust air | |
Activate function of the Exhaust air damper |
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Allocating IOs |
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Configuration > I/O allocation settings > Digital outputs |
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Exhaust air damper |
Any available I/O |
Control signal to hardwired actuator. The DO can stay unconfigured for the modbus type actuator. |
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Damper close delay |
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Data & Settings > Fan control > Extract air fan |
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Exhaust air damper stop delay |
[0] s |
Damper will remain open for the set time after the extract air fan has stopped |
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Flowchart setup |
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Configuration > Functions > Flowchart setup > |
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Exhaust air damper placement |
| Exhaust air | | Extract air | | Exhaust air + Extract air | |
Damper display options in the flowchart |
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Graphical representation |
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Flowchart > Exhaust air damper |
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Indication: Open / Closed |
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Flowchart > Extract air damper |
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Indication: Open / Closed |
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