solution | Application Description
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Control, VVC plus
The main purpose of the
stairwell pressurization fan is safety. However, over pressurization
can make it difficult to open doors onto the stairwell landings
reducing the safety factor greatly.
By using a pressure sensor along with a drive, constant design
pressure can be maintained in the stairwell as the number of doors
opening and closing varies. The drive has the ability to speed up or
slow down the fan rapidly, which safely compensates for the opening
of doors without creating the problem of over pressurization.
Separate pressure setpoints can be established for fire and normal
modes of operation.
In the event of fire, the safety of the evacuation route is
automatically ensured eliminating the need for the mechanical
pressure relief damper.