Additional Requirements For Cpvc Vent Pipe Material; Exhaust Vent Connection To Boiler; Approved Vent Pipe Material; Required Starter Adaptors And Mesh Screen For Cpvc System - Viessmann Vitodens 100-W WB1B Series Installation Instructions Manual

Rigid Venting Systems Installation Instructions
General Installation Information

Additional requirements for 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 34 below and contact Viessmann to order.
Prior to installation, check that the correct single-pipe vent
parts have been ordered and supplied.
See table 34 for special starter adaptor and bird screen
models required for your installation.

Exhaust vent connection to boiler

The vent connection to the Vitodens boiler must be made
with CPVC starter adaptors (see table 34). The starter
adaptors are intended for a slip fit and slide into the boiler
adaptor with a gentle twisting motion.
For a vent pipe system, one wire mesh screen (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 34).
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.
Table 34 Required starter adaptors and mesh screen for CPVC system
Part Boiler Model
CPVC Starter Adaptor
g
g
g
Wire Mesh Screen
g
for Termination
g
Elbows/Coupling
g
Combustion
air inlet
Fig. 74
Legend
A Annular air gap
(continued)
WB1B 26, 35, WB2B 19, 26, 35
WB2B 45, 60
WB2B 80, 105
WB1B 26, 35, WB2B 19, 26, 35
WB2B 45, 60
WB2B 80, 105
WB1B 26, 35 and WB2B 19, 26, 35
Remove and
discard air inlet
cover if using
annular air gap.
Single Pipe Venting (Room Air Dependent)
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. 77
IMPORTANT
For exhaust vent pipe material:
Do not use any other vent material.
Do not use galvanized pipe, plastic pipe and/or chimney
liners of any kind.
Fig. 75
Legend
A Annular air gap
B Optional opening for combustion air intake.
Remove and discard cover.
Size Supplier Quantity
2 in. Viessmann 1
3 in.
4 in.
2 in. Viessmann 1
3 in.
4 in.
Remove and
discard air
inlet cover
if used for
combustion
air intake.
73