7. Boiler bases
Boiler type (mm) A B
DC15E/DC18S/DC22SX
600 600
DC20GS
700 600
DC22S/DC25S/DC30SX
600 800
DC30SE/DC32S/DC25GS/
DC32GS/DC40GS/DC40SX
700 800
DC40SE
700 1000
DC50SE
800 1000
DC50S, DC70S
700 1000
DC75SE
800 1300
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) is not permitted. The
combustion air inlet aperture in the boiler room must
be of minimum 300 cm
2
for boilers of 15 - 75 kW
outputs.
1 - Chimney
2 - Flue 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
We recommend providing a concrete (metal)
base under the boiler.