Vent And Air Intake Pipe Starter Adaptors - Cpvc - Viessmann Vitodens 100-W WB1B Series Installation Instructions Manual

Direct Venting (Two-pipe System)

Vent and Air Intake Pipe Starter Adaptors - CPVC

Vent pipe starter adaptors for WB1B 26, 35 / WB2B 19,
26, 35
Air inlet (intake)
cover must stay
in place.
DO NOT remove!
Optional left
connection
for air intake
Fig. 41
46
B
A
Flue
Air
Rigid Venting Systems Installation Instructions
WARNING
(For this type of installation only:)
Boiler comes with pre-installed combustion air cover
mounted on the concentric vent pipe adaptor. Do not
remove combustion air intake cover. Removing this cover
may cause unintended room air dependent operation
(non-direct vent). Room air dependent operation requires
provision of combustion and ventilation air (as per section
"Single Pipe Venting", page 62).
Legend
A Air intake starter adaptor, 60 mm to 2 in.
B CPVC slip joint starter adaptor, 60 mm to 2 in.
a 2 in. (51 mm)
b 4¾ in. (120 mm)
c 3 in. (76 mm)
d 4¾ in. (120 mm)