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12-GB
GB
Instruction manual - GB
7. Boiler base
We recommend providing a concrete (metal) base under
the boiler.
Boiler type [mm]
A
B
DC105S
1000 800
DC150S
1000 1000
8. Environment type and boiler placement in a boiler room
Boilers may be used in a “basic environment” - AA5/AB5
as specified in Czech standard ČSN3320001. Boilers must be
placed in a boiler room with sufficient air access necessary for
combustion. Placing boilers in living areas (including halls/
corridors) is not permitted. The combustion air inlet aperture
in the boiler room must be of minimum 450 cm
2
.
1 – Chimney
2 – Flue-gas duct
3 - Boiler
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. 200 mm)
. The chimney draught must comply with the specified values. It must however 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 cm diameter
height 11 m
25 cm diameter
height 9 m
Exact chimney dimensions are stipulated in Czech standard ČSN 73 4201.
Specified chimney draught is stated in section 3 „Technical data“.
