Outfall Of The Flue Out Of The Boiler; Connection Of The Boiler To The Chimney - ATTACK SLX20 Instructions For Use Manual

5.4.3 OUTFALL OF THE FLUE OUT OF THE BOILER

Flue has to have outfall to the chimney hole. If it is not possible to connect the boiler to the
chimney hole directly, then the appropriate extension should be as short as possible, of up to 1
m length, without any additional heating area and it must ascend to the chimney. It is good to
insulate the flue, to achieve sufficient flue gas temperature and prevent the chimney condensa-
tion. Flues must be mechanically firm (it is recommended to attach the flue to the boiler and bolt
them together) and tight against the flue leakage and cleanable inside. Flues must not lead
through the somebody else's dwelling or commercial premises. The internal diameter of the flue
must not taper in direction to the chimney. It is not eligible to use the elbow connectors. There
must be an „T-shaped" connection between flue and chimney to let the condensate flow down
to the intended container and not in the boiler.

5.4.4 CONNECTION OF THE BOILER TO THE CHIMNEY

Connection of the appliance to the chimney hole must be always done with permission of the
appropriate chimney sweep association. The chimney hole must always generate sufficient
draught and take the flue gas out into the atmosphere under the all operating conditions.
Correct dimensions of the chimney hole are important for correct boiler function, because burn-
ing, output and boiler life-time are influenced by the draught. The chimney draught directly de-
pends on its diameter, height and roughness of the internal wall. It is not allowed to connect any
other appliance to the chimney, where is the boiler connected. Diameter of the chimney must
not be smaller than the outlet part of the boiler. Chimney draught must achieve prescribed val-
ues. It cannot be too high to not decrease the boiler output and interrupt the burning (flame). If
there is too strong draught, install the throttle flap into the chimney hole between the boiler and
the chimney.
Figure 3 Correct and incorrect parameters of the chimney for connection the SLX boiler
Prescribed values of the chimney diameter and height:
20 × 20 cm
 20 cm
15 × 15 cm
 16 cm
min. height 7 m
min. height 8 m
min. height 11 m
min. height 12 m
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