Flue System For The Vitocrossal, 87 To 635 Kw - Viessmann VITOCROSSAL 200 Type CM2 Technical Manual

Design information

8.8 Flue system for the Vitocrossal, 87 to 635 kW

Due to the low flue gas temperature and the resulting low updraught
forces as well as the condensation of the flue gases inside the flue
8
system, a pressure sealed, corrosion-proof flue system suitable for the
Vitocrossal, 87 to 635 kW is offered as an accessory.
The flue gases are expelled from the flue system with positive pres-
sure. The flue system meets the size requirements of the Vitocrossal,
is made from suitable materials, and is both tested & CE-designated.
Certificate no. 0036 CPD 9184 001
Skoberne
Ostendstr. 1
D-64319 Pfungstadt
According to CE designation to EN 14471, the plastic (PPs) flue pipe
can be used up to a flue gas temperature of 120 °C (type B).
The plastic flue pipes are group B flue pipes (max. permissible flue gas
temperature 120 °C). Flue pipes in buildings must only be run inside
dedicated, longitudinally ventilated shafts or ducts which meet the
requirements for domestic chimney stacks to DIN V 18160-1 (issue
December 2001), section 4.4 to 4.9, or have a fire rating of
90 minutes (F90/L90) and offer the stated minimum internal shaft
dimensions.
VIESMANN
28
(cont.)
At least one inspection port for checking and cleaning as well as for
checking the pressure must be provided in the flue system.
If the flue pipe is inaccessible from the roof, a second inspection port
must be provided in the attic behind the chimney cleaning hatch.
Safeguard the draining of the condensate from the flue pipe (when
routed horizontally) to the boiler with a fall of at least 3°. We also
recommend using fixing clamps to support/suspend the connection
line, spaced 1 metre apart.
The flue system must protrude clear of the roof.
Where the flue pipe is to be installed in an existing chimney, seal any
apertures with appropriate materials and clean the inside of the chim-
ney.
This does not apply to any cleaning or inspection apertures that are
provided with chimney cleaning covers and that are identified with an
appropriate test mark.
Note
A flue gas temperature protection in conjunction with the Vitocrossal
is not required, as the maximum permissible flue gas temperature of
120 °C (flue pipe type B) will not be exceeded under any operating or
fault conditions.
Subject to shaft size, install spacers every 2 to 5 m and at each profiled
piece of the flue pipe (e.g. inspection piece or bend).
Gas condensing boilers