79
5608 741 - 04
Vitodens Rigid and Flex Venting Systems Installation
Direct Venting (Two-pipe System)
Starter Adaptor
Vent pipe starter adaptors for WB1B 26, 35,
WB2B 19, 26, 35, B2HA 19, 28, 35, B2HB 19, 26, 35,
B2TB 19, 35, B2TA 19, 35
*1
For system Ø of 4 in. (100 mm), an increaser adaptor
3 to 4 in. (80 to 100 mm) in addition to this increaser
adaptor must be used.
Legend
A
PP(s) slip joint vent starter adaptor
(60
to 80 mm)
*
1
B
2 in. CVPC starter adaptor,
ViPN 7134 769
a 3 in. (80 mm) nominal
b 2 in. (50 mm)
c 5
b
in. (140 mm)
e 3 in. (80 mm)
Air inlet (intake)
cover must be in place.
DO NOT
remove!
Flue
Air
Optional left
connection for air
intake.
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 86.
Note:
This adaptor
A
may not be required, contact vent
manufacturer for available vent sizes.