Installation guide

Direct Venting (Two-pipe System)
53
Vent Pipe Starter Adaptors
Parallel vent pipe starter adaptors
for WB1B 10-26, 10-35 /
WB2B 9-19/26/35
5368 815 v2.0 b
B
A
Air inlet (intake)
cover must stay
in place.
DO NOT remove!
Optional
left connection
for air intake
a
c
d
b
AirFlue
Fig. 43
Legend
A Air intake starter adaptor, 2”
B CPVC slip joint starter adaptor, 2”
a 2” / 51mm
b 4¾” / 120mm
c 3” / 76mm
d 4¾” / 120mm
(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 provisio
n
of combustion and ventilation air (as
per section “Single Wall Venting”,
page 64).
WARNING