B&C Technologies FC-18 Fire Cabinet - Manual (Page 20)

20 © PODAB 2009
Requirements for ventilation
WARNING
A drying cabinet produces inflammable dust. To minimize the
risk for fire, the evacuation of the cabinet must be connected
to a ventilation channel that evacuates the air.
Never let the evacuated air into a room or a surrounding where
there is a risk for ignition.
Do not use ventilation channels in plastic or fire dangerous
material.
Ventilation channel – choice of material
Ventilation channel, ducts, connections etc are not included.
The ventilation channels shall be at least 160 mm in diameter
and should not have channels or similar on the inside.
We recommend that the ventilation system is built with rigid
metal ducts for best result. Flexible evacuating ducts for drying
cabinets can also be used.
NOTE: Never use flexible ducts through walls or other cov-
ered areas.
NOTE: Do not screw or nit the ventilation channel, so that
the screws will come through the inside of the pipe. This
construction will gather dust and impaire the cabinet’s per-
formance.
The channel shall always be separated from the other ventila-
tion in the house.
Requirements for incoming air
In order to make the cabinet work properly, it is very important
that there is enough incoming air in the room. The incoming air
must be at least 4 00 m³/hour.
If the cabinet is placed in a room where the incoming air is not
enough, we recommend that you install an air exchanger. Con-
tact PODAB for more information.
Ventilation channel – design
IMPORTANT: Always make the channels as short as pos-
sible.
NOTE: If a drying cabinet is installed in an old ventilation
channel, please clean the channel properly.
In order to make the cabinet work properly, the incoming air-
flow must be enough. The amount of evacuated air per hour
is depending on how high the pressure fall in the ventilation
channel is.
Material, the design and the length of the channel have a large
impact on the air flow. In order to get the best possible perfor-
mance, the pressure fall shall be as low as possible.
When the air is transported through the channel, it is exposed
to different kind of resistance. Factors that give a low pressure
fall:
Smooth inner walls on the pipe •
Large diameter on the pipe •
Short length on the pipe •
Few curves •
Few angels (90 degrees) •