5.19 Safety functions (SftyCtl11y)
Ventilation unit can be equipped with various kinds of hazard indicators such as
smoke, carbon monoxide detectors or human interaction (push button).
Four different situations are implemented:
●
Smoke extract, DI signal with configurable plant reaction
●
Emergency off, DI signal always shutting down the plant, but not closing fire
dampers
●
Temperature supervision, always shutting down the plant and closing the fire
dampers, if existing.
●
Fire dampers, described above, always shutting down the plant.
5.19.1 Duct temperature supervision
Maximum duct temperatures are monitored with sensors supply air temperature
TSu, with temperature after preheating TSuAfPreHcl (if installed) and extract air
temperature TEx (if installed).
If duct temperature rises over set fire alarm value it, an A-alarm is raised, and an
immediate shutdown is activated, fire dampers are closed, if existing.
Additionally a B-Alarm for maintenance is raised, if supply air temperature exceeds
a maximum maintenance limit or falls below a minimum maintenance limit during
normal operation.
Available parameters
Basic settings
BACnet object
R/RW
Note
Supply air temperature fire alarm limit
TSuFireAlmLm
AVAL,37
RW
°C
Extract air temperature fire alarm limit
TExFireAlmLm
AVAL,40
RW
°C
Supply air temperature max maintenance limit
TSuHiAlmLm
AVAL,38
RW
°C
Supply air temperature min maintenance limit
TSuLoAlmLm
AVAL,39
RW
°C
Application functionalities
Safety functions (SftyCtl11y)
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