Assortment / System Description

Fan
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Powered Box
Application examples
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The non-return damper ensures on an application with parallel fans, that no
fresh air can enter the room via the return air duct.
The fan receives demand signals from the VAV box and the auxiliary heating
register. The following image is a diagram of various locking and monitoring
signals of a serial fan powered box application.
P Primary volume flow AirFlSu Supply air flow sensor
R Return air volume flow AirFlMx Mixed air flow sensor
F Fan volume flow TSu Supply air temperature sensor
AirFlSt Air flow state AirFlVavRe
q
VAV request signal to fan
ReDmp Return damper AirFlHReq Request signal from heating
register to fan
AirFlHldH Switch-off delay signal from
heating register to fan
Figure: Parallel FPB application