Installation Steps (Outline); Exhaust Vent Pipe Material - Viessmann Vitodens 200-W WB2B Series Installation Instructions Manual

Vitodens Rigid and Flex Venting Systems Installation
General Installation Information

Installation steps (outline)

Exhaust vent pipe material

Use only the materials listed on page 56 for exhaust vent
pipe fittings.
Cut the pipe end square and remove all burrs and debris

from joints and fittings.
If using CPVC special vent material for exhaust vent

pipe, all joints must be properly cleaned, primed and
cemented. Use only cement and primer approved for
the use with the pipe material. See table on page 56
for approved solvent cement material.
CAUTION
For solvent cement and primer:
Use only in well ventilated areas

Do not use near flame or open fire

Use only the solvent cement and primer appropriate

for the venting material being used
Solvent cements for plastic pipe are flammable liquids

and must be kept away from all sources of ignition
No low point is allowed in the exhaust vent pipe system,

unless a proper drain pipe is used to allow condensate
to drain.
All PP(s) vent material and air intake (if PP(s)used) must

be ULC S636 or UL1738 listed, manufactured by M&G
/ DuraVent, Centrotherm InnoFlue, PolyFlue, or ECCO
manufacturing.
WARNING
Ensure that the entire venting system is protected from
physical damage. A damaged venting system may
cause unsafe conditions.
WARNING
The venting system is approved for indoor installations
only.
Do not install the venting system outdoors.
Single Pipe Venting (Room Air Dependent)
Route vent pipe as directly as possible and with as few

bends as possible to the boiler.
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)].
Use a hacksaw or sheet metal snips (for stainless steel

to cut pipes to length (if necessary). Use a file to smooth
rough edges. Pipe must be round and not bent into an
oval shape.
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.

IMPORTANT
When cutting pipes to length, debur and clean pipes.
In conjunction with these instructions, follow the
installation instructions supplied by the special venting
manufacturer.
All piping must be fully supported. Use pipe hangers

at a minimum of 48 in. (1219 mm) intervals to prevent
sagging of the pipe.
The exhaust vent pipe and fittings must be securely

supported by a support system suitable for the weight
and design of the material employed. Contact your local
vent material supplier for more information specific to
your installations.
IMPORTANT
Ensure that the exhaust vent pipes are properly supported.
The Vitodens boiler is not designed to support the weight
of the exhaust vent pipe system.
Field supplied increaser fittings (transitions) should

always be made in vertical sections of pipe to prevent
accumulation of condensate in the vent pipe.
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.
55