Installation guide

Direct Venting (Two-pipe System)
AB
Fig. 33 Coaxial vent pipe system
A Combustion air
B Flue gas
40
Direct Venting Options (Two-pipe System)
Boiler models Vitodens 100-W WB1B 10-26/30 and Vitodens 200-W WB2B 9-19/26/35
As opposed to coaxial venting
systems, the two-pipe venting system
draws combustion air A through a
separate air intake pipe from the
outdoors. Flue gases B are discharged
to the outdoors via the single-wall pipe
of the special venting system. The
two-pipe system is flexible in the
selection of materials offered by
different manufacturers and the
location of the vent/air intake
termination.
Read the following exhaust vent/air
intake requirements carefully before
commencing with the installation.
Boiler models Vitodens 200-W WB2B 17-45/60 and WB2B 30-80/105
B
A
B
A
A
For double-pipe installation,
the combustion air inlet
cover must be in place.
Remove and discard com-
bustion air inlet cover when
installing coaxial vent pipe
system.
Fig. 31 Single or double pipe
installation
Fig. 32 Coaxial vent pipe system
A Combustion air (requires 2”
CPVC adaptor)
B Flue gas (requires 2” CPVC
adaptor)
Coaxial vent pipe system
A Combustion air
B Flue gas
5368 815 v2.0 b