Environment Type And Boiler Placement In A Boiler Room; Chimney; Flue-Gas Duct - Atmos C15E Instruction Manual

8. Environment type and boiler placement in a boiler room

9. Chimney

Connecting the appliance to the chimney vent stack must always be carried out with the per-
mission of the appropriate chimney authority. The vent stack must always be capable of providing
sufficient draught and it must discharge the waste gas into the open atmosphere in a reliable manner
for all possible operating conditions. The dimensions of the individual vent stack must be correct to
ensure good functionality of the boiler; because the draught influences combustion, performance
and the service life of the boiler. The chimney draught is directly dependent on its cross section,
height and the inner wall ruggedness. It is not permitted to connect another appliance into a chimney
into which a boiler is connected. The chimney diameter must not be smaller than the boiler outlet
(min. 150 mm). The chimney draught must comply with the specified values (see technical data, page
6). The chimney must not be excessively high, otherwise the boiler effectiveness is decreased and the
combustion is affected (the flame "breaks"). In case of excessive draught, install a throttle valve in the
flue gas duct between the boiler and the chimney.
Indicative values of the chimney cross section dimensions:
20 x 20 cm
Ø 20 cm
15 x 15 cm
Ø 16 cm
Exact chimney dimensions are stipulated in Czech standard ČSN 73 4201:2002. Specified
chimney draught is stated in section 3 „Technical Data".

10. Flue-gas duct

The flue-gas duct must be connected into the chimney vent stack. If the boiler cannot be connected to
the chimney directly, the appropriate flue-gas duct extension must be as short as possible in the given
circumstances, but not longer than 1m, it must be without additional heating surface and must incline
14-GB
Instruction manual - GB
Boilers may be used in a "basic environment" - AA5/
AB5 as specified in Czech standard ČSN3320001/
1995. Boilers must be placed in a boiler room with
sufficient air access necessary for combustion. Plac-
ing boilers in living areas (including halls) is not per-
mitted. The combustion air inlet aperture in the boiler
room must be of minimum 250 cm2 for boilers of 15
- 75 kW outputs.
- 1. Chimney
- 2. Flue duct
- 3. Boiler
height 7m
height 8 m
height 11 m
height 12 m
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