Nemaxx PW18 Manuel D'utilisation page 11

2.8 CONNECTION TO THE FLUE PIPE
The connection between stove and chimney or flue for
the proper operation must not be less than 5% slope
in the horizontal sections whose total length should
not exceed 1.5 meters. and the vertical by a "T" to
another (changing direction) must not be less than 1.5
meters. Check with suitable instruments that there is a
minimum draft. of 10 Pa. At the bottom of the chimney
inspected for periodic inspections and cleaning, which
must be conducted annually.
You must ensure that a chimney is installed according
to wind force.
This type of connection, even in case of mo-
mentary power failure, ensuring the evacuation
of the fumes.
1. Windproof cowl
2. Flue pipe
3. Inspection
2.9 OPERATING PROBLEMS CAUSED BY DRAUGHT DEFECTS IN THE FLUE
Of all the meteorological and geographical factors that
affect the operation of a flue (rain, fog, snow, altitude
above sea level, period of insulation, exposure to the
cardinal points, etc.) the wind is certainly the most de-
cisive. In fact, besides the thermal depression caused
by the difference in temperature between the inside
and the outside the chimney, there is another type of
depression (or overpressure): the dynamic pressure
induced by the wind. An ascending wind always has
the effect of increasing depression and then the draft.
A horizontal wind increases depression for proper ins-
tallation of the chimney. A descending wind always has
the effect of relieving depression, sometimes inverting
it. In addition to the direction and force of the wind, the
position of the flue and the chimney from the roof of the
house and the surrounding landscape is important.
0,5 m
2 - 3 m max
WIND
+ = HIGH PRESSURE ZONE
- = LOW PRESSURE ZONE
A = LESS FAVOURABLE POSITION
B = MOST FAVOURABLE POSITION
[ EN ● 11 ]
KEN002PW18 25.11.2019
3 - 5 %
A
Version: 2.0
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2
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B