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AST 14 C 255/00
3.6 FLUE GAS FAN
Flue gas fan is of asynchronous type (fixed speed) and is used to purge flue gases
generated by combustion during boiler operation. The fan features a Pitot plastic pipe to
limit the condensate build up on the fan pressure measurement point to which a control
device (air pressure switch) is connected to ensure correct ventilation. This device ensures
that the difference between the pressure generated by the fan and the pressure detected
in the boiler is at least equal to the minimum value needed for the boiler to work properly.
Power of flue gas fan, as well as pressure switch for ventilation control, vary depending on
boiler model.
A double fan, interchangeable depending on the supplier (FIME or NATALINI), is available
only for the 24kW boiler, whereas only one version (FIME) is available for the 28 and 32
kW models.
The differences between the two models are listed below:
FIME
NATALINI
Fan technical characteristics:
Boiler output
24 kW
28 - 32 kW
Supplier
Fime Natalini
Fime
Power supply
230 Vac, 60 Hz
Power [W]
38 35
60
Type of worm screw
Die-cast
Sheet
metal
Die-cast
Air pressure switch technical characteristics:
Boiler output
24 kW
28 - 32 kW
Working scale [Pa]
45 - 32
125 - 112
Reference colour
white yellow
