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GB-13
GB
Instruction manual - GB
10. Flue-gas duct
The flue-gas duct must be connected into the chimney
vent stack. If the boiler cannot be connected to the chim-
ney 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 to-
wards the chimney.
Flue-gas ducts must be mechanically
durable and sealed against combustion products and com-
bustion 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 di-
ameter of the flue-gas duct must not be larger than the
internal diameter 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 struc-
tures are stipulated in appendices 2 and 3 of the Czech
standard ČSN 061008. These are appropriate for mobile
installations, wooden cottages etc. The flue-gas duct shall
always be fitted with a waste gas thermometer.
1
- Waste gas thermometer
2
- Cleaning aperture
3
- Throttle valve (draught limiter)
In case of excessive chimney draught, install a throttle valve or draught limiter (regulator) /3/.
Boiler
Chimney
