Vent And Air Intake Pipe Starter Adaptors - Pp(S) - Viessmann Vitodens 100-W WB1B Series Installation Instructions Manual

Direct Venting (Two-pipe System)

Vent and Air Intake Pipe Starter Adaptors - PP(s)

Vent pipe starter adaptors for WB1B 26, 35 /
WB2B 19, 26, 35
Vent starter adaptor is not required if using PP(s) system.
Air intake cover must
stay in place.
DO NOT remove!
When using PP(s) material for
combustion air supply pipes,
CPVC adaptors are not required.
Legend
A Air intake starter adaptor,for PVC, CPVC and ABS
only - 60 mm to 2 in. (if using PP(s) for air intake
system, an adaptor is not required).
Optional left
connection for
air intake
Fig. 44
Legend
a 2 in. (51 mm)
b 4¾ in. (120 mm)
c 3 in. (76 mm)
d 60 mm
48
Flue Air
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).