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14-GB
Instruction manual - GB
GB
8. 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; b
ecause 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
7). 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
height 7 m
20-cm diameter
height 8 m
15 x 15 cm
height 11 m
16-cm diameter
height 12 m
Exact chimney dimensions are stipulated in Czech standard ČSN 73 4201.
Specified chimney draught is stated in section 3 „Technical Data“.
9. 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
upwards in the direction towards the chimney
. Flue-gas ducts must be mechanically durable and
sealed against combustion products and gas penetration, and it must be possible to
clean them inside
.
The flue-gas ducts must not be lead through another person‘s apartment or property. The internal diam
-
eter of the flue-gas duct must not be larger than the internal di
-
ameter of the chimney intake and it must not decrease in width
in the direction towards the chimney. Use of elbow-pipes is not
suitable. Methods for providing flue-gas duct entries through
flammable material structures are stipulated in appendices 2
and 3 of the Czech standard ČSN 061008. These are appropri
-
ate for mobile installations, wooden cottages etc.
1
- Waste gas thermometer
2
- Cleaning aperture
3
- Throttle valve (draught limiter)
INFO
- In case of excessive chimney draught, in-
stall a throttle valve /3/ or draught limiter.
Boiler
Chimney
