Vent Requirements - Cpvc; Additional Requirements For Ul/Ulc-Listed Cpvc Vent Pipe Material; Exhaust Vent/Air Intake Connection To Boiler; Approved Vent Pipe Material - Viessmann Vitodens 100-W WB1B Series Installation Instructions Manual

Direct Venting (Two-pipe System)

Vent Requirements - CPVC

Additional requirements for UL/ULC-listed CPVC vent pipe
material
Use UL/ULC-listed special plastic pipe (CPVC) for
horizontal (side wall) or vertical (roof) venting of the
Vitodens boilers.
See table 22 below and contact Viessmann to order
special parts.
Prior to installation, check that the correct single-pipe
vent parts were ordered and supplied.
See table 22 for special starter adaptor and bird screen
models required for your installation. In case of
discrepancies, contact Viessmann.

Exhaust vent/air intake connection to boiler

The vent connection to the Vitodens boiler must be made
with the CPVC starter adaptor and/or parallel adaptor (see
table 22). The starter adaptors are intended for a slip fit
and slide into the parallel adaptor with a gentle twisting
motion.
For vent/air intake pipe system, two wire mesh screens
(bird screen) must be ordered from Viessmann. These
parts are available in pre-cut diameters of 2 in., 3 in. and
4 in. (see table 22).
IMPORTANT
For exhaust vent pipe material:
Do not use any other vent material.
Do not use galvanized pipe, plastic pipe and/or chimney
liners (rigid or flexible) of any kind.
Table 22. Required starter adaptors for CPVC system
Part
Parallel Pipe Adaptor
CPVC Starter Adaptor
Wire Mesh Screen
for Termination
Elbows/Coupling
* 1 See fig. 44 on page 48.
* See fig. 42 on page 47.
2
* 3 See fig. 43 on page 47.
44
Boiler Model
WB2B 45, 60
g
WB2B 80, 105
g
WB1B 26, 35,
g
WB2B 19, 26, 35
WB2B 45, 60
g
WB2B 80, 105
g
WB1B 26, 35
g
WB2B 19, 26, 35
WB2B 45, 60
g
WB2B 80, 105
g
Rigid Venting Systems Installation Instructions
Note: The Vitodens boiler has passed the zero inches vent
clearance to combustibles testing requirements
dictated by the Harmonized Standard ANSI Z21.13.
CSA 4.9.2010 and therefore is listed for zero
clearance to combustibles when vented with a
single pipe special venting system (CPVC material).
The zero inches vent clearance to combustibles
for the Vitodens boiler supersedes the clearance to
combustibles listing that appears on the special
venting system marking label.

Approved vent pipe material

Fig. 40
WARNING
The use of vent material other than listed CPVC,
positive pressure vent pipe and fittings can cause
property damage, severe personal injury and/or loss of life.
Diameter
3 in.
4 in.
2 in. *
3 in. *
4 in. *
2 in.
3 in. (if used)
4 in. (if used)
3 in.
4 in.
Supplier Quantity
Viessmann 1
1
1 Viessmann 2
2
2
2
3 2
Viessmann 2
2
2
2
2