TEL AFA1000/2 MK2, Installation & Operating Manual

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Version 01 / p.42
AFA1000/2 MK2 Airflow Monitor
Installation & Operating Manual
7.2 Optional Input function - Close Sash Alarm
A Close Sash alarm can be set up on the monitor to inform the user that the sash has been left
open when the Fume Cupboard is unoccupied. The alarm can be set with a time delay before
activation to allow the user to briefly leave and return to the Fume Cupboard and can also be set
with a repeat alarm if the sash is left open for prolonged periods of time.
The alarm function uses a PIR occupancy sensor and is connected in series with a micro switch
input to detect the sash position.
Typical connection diagram with micro switch