For Polypropylene Venting Systems Only; Venting Clearance To Combustibles (Stainless Steel / Polypropylene) - Viessmann Vitocrossal 200 Installation Instructions Manual

Vitocrossal 200 CM2 186 to 311 Installation
Important Regulatory and Installation Requirements

For Polypropylene venting systems only

Minimum and maximum wall thickness through which the
horizontal vent-air intake termination may be installed:
Minimum: 1 in. (25.4 mm)
Maximum: 30 in. (762 mm)
Vent-air intake system must be properly installed and sealed.
If PP venting 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.
Venting clearance to combustibles (Stainless Steel /
Polypropylene)
As per vent manufacturer's requirements.
(continued)
WARNING
The Vitocrossal 200 is NOT approved for common
venting applications.
Do not attempt to common-vent the boiler with any
other appliance.
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.
CAUTION
Under certain climatic conditions some building materials
may be affected by flue products expelled in close
proximity to unprotected surfaces. Sealing or shielding
of the exposed surfaces with a corrosion resistant
material (e.g. aluminum sheeting) may be required to
prevent staining or deterioration. The protective material
should be attached and sealed (if necessary) to the
building before attaching the vent termination. It is
strongly recommended to install the vent termination
on the leeward side of the building.
Safety
7