Flashing And Storm Collar Installation; Vent Termination Location Requirements - Vertical - Viessmann Vitodens 100-W WB1B Series Installation Instructions Manual

Single Pipe Venting (Room Air Dependent)
Component Installation Guide

Flashing and storm collar installation

Flashings and storm collars are field supplied. Flashings
and storm collars suitable for Type B vent materials (or
better) may be used.
To obtain flashings and storm collars, please contact
your local vent material supplier. Follow the installation
instructions supplied by the special venting manufacturer.

Vent Termination Location Requirements - Vertical

The vent must be installed observing local regulations in
addition to National Codes, CAN/CSA-B149.1 or 2 (for
installations in Canada) or ANSI-Z223.1 or NFPA 54 (for
installations in the U.S.A.).
Fig. 86
Fig. 88
For sloped roof applications with distance b less than
g
18 in. (450 mm)
a minimum 18 in. (450 mm)
b <18 in. (450 mm)
82
(continued)
b
Rigid Venting Systems Installation Instructions
See table below for the following two conditions.
For sloped roof applications with distance b greater
g
than 18 in. (450 mm)
For flat roof applications
g
Boiler Model
WB1B / WB2B
WARNING
Vent termination must be at least 12 in. (300 mm)
above the anticipated snow level (consult your local
building authorities or local weather office). Locate
vent termination in such a way that it cannot be
blocked by snow.
Fig. 87
A vent used in a special venting system with positive
vent pressure and passing through a roof shall extend at
least 18 in. (450 mm) above the highest point where it
passes through the roof and any other obstruction within
a horizontal distance of 18 in. (450 mm).
The special vent system shall not be routed into, through,
or within any other vent such as an existing masonry or
factory-built chimney.
IMPORTANT
A masonry chimney flue may be used to route the venting
system only if no other appliance is vented in the same flue.
a (min. distance)
18 in. (450 mm)