INSTALLATION INSTRUCTIONS
RK 100 - RAD - ING - MAN.INST - 1311.1 - DIGITECH CS MIAH4
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3.9 Flue connections
3.9.1 General
warnings
In order to ensure that the appliance functions correctly and efficiently, the flue connection between
the boiler and the flue terminal must be made using original components specifically designed for
condensing boilers.
The flue connection must be carried out in accordance with relevant standards.
Prior the installation, check and carefully respect the current standards. Respect instructions referring
to flue terminals positioning on the wall and/or on the roof, minimum distances from windows, wall, air
openings…
3.9.2 General
instructions
The boiler is a B
23P
type with a positive pressure connection to a combustion products discharge system which
intakes the comburent air from the installation sites.
Thanks to the air-gas premix, the boiler is indipendent from any flue efficiency loss of flue exhaust and
comburent air intake systems. But the maximum flue efficiency loss of the system must not be exceeded to
avoid a reduction of the heat output. Checking the air-gas premix will always guarantee on optimal combustion
and low polluting emissions.
The maximum flue efficiency loss along the boiler flue connections is 146 Pascal.
The sub-horizontal parts of flue exhaust kits must always be installed with a slope (3° slope = 5 mm pipe per
metre) compared to the boiler installed.
The boiler must be connected to one of the following flue exhaust systems.
Flue ducts and chimney must be properly dimensioned, planned and produced in compliance with relevant
standards. Their material must be suitable to the final aim with particular resistance to the corrosion, internally
smooth and hermetic sealed. Particularly, joints must be condensate tight. To avoid that the condensate
produced inside the flue hood flows into the boiler, proper drain points connected to a condensate trap must be
previewed.
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