P2_GEPARD_user manual_ work basis_EN_02 - 02/10 - Protherm
- 19 -
HOW TO USE THE BOILER
supplied with air) and exhaust extracted
into a common chimney (or, again, into a
space with common venting of exhaust
gases). The special case of B
22
also
belongs in this category. (See following
text.)
The B
8.15.7
22
method
Extraction of exhaust (also in separate
piping) into an open area and intake of
combustion air from an internal space in
the building in close proximity to the boiler
(in coaxial piping with the perforation of its
outer part).
Length of fume ducting (23 MTV):
80 / 80: min. 2 m, max. 2 m. The
-
diffuser must be removed.
When drawing in air for combustion from
internal areas of the building, a suf
fi
cient
quantity of that air must be ensured. No
other appliance may be connected to the
exhaust duct (whether chimney or pipe),
and when drawing in air at least 1.2 m3 of
air/hour per kW of boiler output must be
available.
Piping gradient
8.15.8
The layout of the piping must permit
a down-gradient of the exhaust piping
towards the boiler at a nominal gradient
of 3 percent. A device for drawing off
condensate must be placed on the piping
as close as possible to the boiler.
Examples of
fl
ue duct
8.15.9
placements according
to Appendix No 7 of the
Government Regulations of the
SR No 92/1996 Coll.
Independent apertures in a
fl
at wall
-
Independent aperture creates a zone from
the axis of the aperture of a width a = 0.5
m, radius b = 1.0 m and height c = 5.0 m.
Sketch of the zone created by an
independent aperture of an exhaust stack
If the axis of the aperture is at a distance
d > 0.3 m below the upper part of the
window frame, the zone may not extend
to the window surface. At distances d
≤
0.3 m, the protective zone of radius b may
extend to the upper part of the window.
Sketch of the zone from the axis of the
aperture of the exhaust stack sited close
to the upper part of the window