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14-GB
Operation and Maintenance Manual - GB
7. Flue gas duct of the boiler
The flue gas duct from the boiler must lead to the
chimney vent. If the boiler cannot be connected directly
to the chimney vent, the corresponding flue gas duct
adapter must be as short as possible with regard to the
particular conditions, but
not longer than 1 m
, without
additional heating surface and
it must rise towards the
chimney
. Flue gas ducts must be mechanically strong
and leak-proof for flue gas and cleanable inside. Flue gas
ducts must not lead through other owners‘ residential or
commercial units. The inner cross-section of the flue gas
duct must not be larger than the inner cross-section of
the smoke uptake and must not get narrower towards the
chimney. The use of smoke elbows is not suitable. De-
signs of passages of flue gas ducts through structures of
flammable materials are defined in Annexes 2 and 3 of
ČSN 061008 and are mainly suitable for mobile units,
wooden huts, etc.
1.
Flue gas thermometer
2.
Cleaning opening
3.
Throttling flap (draught reducer)
INFO
- In case of too strong draught of the chimney install a throttling flap /3/ or a draught
reducer in the flue gas duct, see the ATMOS price list.
8. Fire protection within the installation and use of heat appliances
Extract from ČSN 061008 - Fire safety of local appliances and sources of heat
Safe distances
On installation of an appliance the safe distance from building materials must be maintained, at
least 200 mm. This distance is valid for boilers and flue gas ducts located near flammable materials of
the B, C1 and C2 flammability class (the flammability class is specified in tab. no. 1). The safety distan-
ce (200 mm) must be doubled if boilers and flue gas ducts are located near flammable materials of the
C3 class (see tab. no.1). The safety distance must be doubled if the flammability class of flammable
material is not evidenced. The safety distance may be reduced to a half (100 mm) if you use a non-flam-
mable heat insulating panel (asbestos panel) with the thickness of at least 5 mm, located 25 mm from
the protected flammable material (flammable insulation). A shielding panel or protective screen (on the
protected object) must exceed the outline of the boilers (incl. flue gas ducts) at each side by at least 150
mm and the top surface of the boiler by at least 300 mm. A shielding panel or protective screen must
also be used to protect fixtures of flammable materials if the safe distance cannot be maintained (e.g. in
mobile units, huts, etc. - more details in ČSN 061008). The safety distance must also be maintained in
