Exhaust Vent Requirements; Vent System Suppliers - Viessmann Vitodens 200-W WB2B Series Installation Instructions Manual

Vitodens Rigid and Flex Venting Systems Installation

Exhaust Vent Requirements

The Vitodens 100-W, 200-W and 222-F boilers must be
located in such a way that the vent length is as short as
possible and that the vent can be routed as directly (and
with as few bends) as possible.
See pages 83 and 84 for maximum vent lengths.
All products of combustion must be safely vented to the
outdoors.
The Vitodens boiler is not approved for common-venting
applications. Do not common-vent with any other
appliance. The Vitodens boiler vents under positive
pressure and is a Category IV boiler.
WARNING
Failure to ensure that all flue gases have been safely
vented to the outdoors can cause property damage,
severe personal injury, or loss of life. Flue gases may
contain deadly carbon monoxide.
Viessmann recommends that the entire vent system be
checked by a licensed professional heating contractor at
least once each year following initial installation.
WARNING
Different manufacturers offer a number of different joint
systems and adhesives. Do not mix pipes, fittings and/
or joining methods from different manufacturers. Failure
to comply could result in leakage, potentially causing
personal injury or death.
Do not install vent pipe in a way that flue gases flow
downwards. The direction of flue gas flow must be
vertically upwards or horizontal with an upward slope.
Ensure there is no flue gas leakage into the area in which
the boiler is installed.
Check proper location of gaskets in rigid PP(s) pipe collars.
(Only use supplied parts with the polypropylene venting
system).
Apply water to lubricate the joint ends of the vent pipe
collar and if used, the air intake pipe collar.
Slide pipes into each other with a gentle twisting motion.
Check joints for leaks with the gas supply turned off and
the fan running. Use a soapy solution to check for vent
leaks.
Condensate must drain from the flue pipe to the boiler.
Ensure a suitable gradient of at least 3º [approx. 2 in.
per 3.3 ft. (50 mm per 1 m)].
No condensate trap is required in the vent pipe system.
If exhaust vent pipe system passes through an unheated
space, such as an attic, it must be insulated. The
insulation must have an R value sufficient to prevent
freezing of the condensate. Armaflex insulation with
b in. thickness and higher can be used.
The connection between the boiler and the base of the
flexible pipe is made with rigid vent components (flexible
pipe cannot be run directly to the boiler).
The flexible pipe can only be used in vertical installations.
Direct venting (two-pipe system) or single pipe (room
air independent) is acceptable (refer to page 86 for
combustion air requirements for room air dependent
installations.
For direct venting applications the air intake pipe can be
installed through the sidewall or vertical through the roof.
Any increaser used in the exhaust vent/air intake pipe
must be installed in the vertical position.
The remaining space surrounding a chimney liner, gas
vent, or special gas vent or plastic piping installed within
a masonry, metal or factory-built flue shall not be used
to supply combustion air (a separate combustion air pipe
routed back to the boiler can be used in the remaining
space if required).

Vent system suppliers

Use special venting system (UL/ULC listed for Category
IV) for exhaust vent material of the Vitodens boilers.
Contact on of the following suppliers to order parts.
All manufacturers deliver PP(s) rigid and flexible vents
the required sizes.
2 in. (60 mm)
3 in. (80 mm)
4 in. (100 mm)
M&G / Duravent
www.duravent.com
PolyFlue - Selkirk
www.polyflue.com
Z-FLEX US Inc.
NovaFlex Group
www.novaflex.com
General Information
2 in. (60 mm)
3 in. (80 mm)
4.3 in. (110 mm)
Centrotherm InnoFlue
www.centrotherm.us.com
ECCO Manufacturing
www.eccomfg.com
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