Existing Chimney Type C91 - Dovre VINTAGE 35GA Type C11 Mode D'emploi

manufacturer Muelink & Grol. The appliance can also
be connected to a concentric flue gas exhaust system
from the manufacturers Metaloterm or Poujoulat. Use
the appropriate connection collar (available from your
supplier) and follow the supplier's instructions for the
installation.
Use only original parts from the manufacturers
named above. You can order the elements for the
concentric pipe system (such as wall sleeves, roof
sleeves, tubes and bends, clip bindings and brac-
kets) in the desired quantities via your supplier.
You can find the order codes of the available
elements in the appendix "Materials list for con-
centric flue gas exhaust".
The appliance may not be connected to an existing
flue gas exhaust duct or chimney just like that. An
existing chimney or flue gas exhaust duct can be
used as an active element in the installation under
certain conditions. See the paragraph "Existing
chimney duct".
The appliance has a closed combustion chamber
and must be installed as a closed appliance of type
C11-C31 (depending on the choice of wall or roof
sleeve). With a combined intake-exhaust, the natu-
ral draught of the appliance removes the com-
bustion gases outside. The same natural draught
sucks in the necessary combustion air. The con-
centric flue gas exhaust system can be equipped
with a wall sleeve or a roof sleeve. Use the pre-
scribed wall outlet or roof outlet for this purpose.
A maximum value of 12 metres applies to the total
allowable length of the pipe system (the resistance
length). Every bend of 90° corresponds to 1 metre
of resistance length and every bend up to 45° cor-
responds to 0.5 metres of resistance length.
The horizontal section of the pipe system may
never be longer than the vertical section.
In order to maintain the natural draught, at least one
metre of concentric pipe must be placed vertically
before the wall or roof sleeve is installed.
Before the appliance can be placed, you must
check whether the pipe route desired for your
installation is technically permitted. See the
appendix "Calculation sheet for checking pro-
jected route".
Subject to change because of technical improvements
The distance from ducts and sleeves to com-
bustible material must be at least 50 mm eve-
rywhere.
All elements of the air supply and the flue gas
exhaust system must be inserted at least 30 mm
into each other and be secured against coming
loose using clip bindings.
The duct must be kept in its position by means of
wall brackets and centring plates. The maximum
distance between the wall brackets is 2 metres.
The flue gas exhaust system and the outlet must
satisfy any local regulations that apply. This is a
closed appliance of type C11 or C31 (depending on
the choice of wall or roof sleeve).
The flue must end in a zone that is not affected by
surrounding buildings, trees close by or other obsta-
cles.
For outlets that are in the vicinity of a boundary par-
tition or ventilation opening, see the national and
regional regulations regarding this.
In the case of a wall sleeve, the outlet must be in a
zone such that any contact between flue gas outlet
and/or flue gases and people is impossible and
such that the flue gases cannot accumulate under
overhanging parts of buildings or awnings or such
like.
The flue gas outlet can reach temperatures of
200 °C, while the flue gases can reach 300 °C.

Existing chimney Type C91

An existing flue gas pipe (chimney) can be converted
into a concentric flue gas exhaust system.
In this case, the following requirements apply to the
existing chimney:
The existing pipe must be leakproof and thoroughly
cleaned.
The pipe must be able to withstand temperatures
up to 600°C along its entire length.
The pipe may change direction no more than one
time, with a maximum change angle of 45° and
along no more than 25% of the total length.
The pipe must have a diameter of at least 150 mm
round or square, and no more than 250 mm round or
square along the entire length. The section may not
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