Venting Options (Two-Pipe System) - Viessmann Vitodens 100-W WB1B Series Installation Instructions Manual

Direct Venting (Two-pipe System)

Venting Options (Two-pipe System)

Boiler models;
Vitodens 100-W WB1B 26, 35,
Vitodens 200-W WB2B 19, 26, 35,
Vitodens 200-W B2HA 19, 28, 35,
Vitodens 200-W B2HB 19, 26, 35,
Vitodens 222-F B2TA 19, 35
Vitodens 222-F B2TB 19, 35
When utilizing the combustion air inlet seal A for Vitodens
100 series and 200 WB2B boilers, remove the plastic
center section and leave the rubber seal in place.
for Vitodens 100 series and 200 WB2B boilers
When utilizing the combustion air inlet seal A for Vitodens
200 B2HA/B and 222 B2TA/B series boilers, remove the
inlet seal A, tear out center section and install the remaining
rubber seal back into the air inlet opening.
for Vitodens 200 B2HA/B and 222 B2TA/B boilers
Fig. 5 Single or two-pipe installation
Legend
A Combustion air (requires 2 in. CPVC adaptor)
B Flue gas exhaust
14
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-pipe rigid-pipe and flexible vent system.
The two-pipe system is flexible in the selection of
materials offered by different manufacturers and the
location of the air intake termination.
Read the following exhaust vent/air intake requirements
carefully before commencing with the installation.
Boiler
WB1B 26, -35 WB2B 19, 26, 35,
B2HA 19, 28, 35, B2HB 19, 26, 35
B2TA 19, 35, B2TB 19, 35
WB2B 45, -60, B2HA 45, 60
WB2B 80, -105
B2HA 890, 100, 112, 150
IMPORTANT
For Vitodens 100 series boilers, remove the plastic plug
for the combustion air connection. For Vitodens 200/222
series boilers, tear out the center section of the rubber
gasket only.
Boiler models Vitodens 200-W WB2B 45, 60, 80, 105
and B2HA 45, 60, 80, 100, 112, 150
Fig. 6 Single or two-pipe vent system
(parallel adaptor not shown, see page 16)
Legend
A Combustion air
B Flue gas exhaust
Flexible Venting Installation
Flue Gas Exhaust Size
2 in. (60 mm)
3 in. (80 mm)
4e in. (110 mm)