Connection To The Chimney Flue; Chimney Flue - Caminetti Montegrappa TECH 3 Directions For Installation, Use And Maintenance

2.3.6 Connection to the chimney flue
For the connection of the unit to the chimney flue, use only non-combustible elements suitable to resist to the combustion
products and to the condensate (creosote) build-up.
The use of fibrocement and aluminium flexible pipes for connecting the appliance to the chimney flue is
FORBIDDEN.
The appliance works with negative pressure; to prevent creosote from building up and be conveyed to the appliance it is
important that the connection to the chimney flue be sealed and airtight.
The connection to the chimney flue should ensure easy removal of soot and routine cleaning by means of a metal brush.
It is FORBIDDEN to install any manually-operated draught controls along the connection to the chimney flue.
After having placed the appliance in the exact position as indicated under section 2.3.3, use rigid steel pipes with the same section
as the "flue exit pipe" (see technical sheet, section 1.3.2) to carry out the connection to the chimney flue, and perfectly seal the
connection. (Use CE certified products according to the standard EN 1856-2:2003).
It is FORBIDDEN to carry out any diameter reductions of the connecting pipe to the chimney flue.
2.3.7 Chimney flue
The passageway for conveying flue gases from the appliance to the "chimney flue" (technically, chimney) is called "flue conduit".
The flue conduit must be built in compliance with the standard EN 1856 parts 1-2.
The chimney flue or the vertical exhaust vent for the flue gases from a natural draught appliance must therefore meet the
following requirements:
Be flue gas- and water-tight, and properly insulated from combustible or flammable materials according to the usage
conditions (EN 1443 and EN 13384 parts 1-2-3).
Be made of materials resistant to usual mechanical shocks, heat, flue gases and possible condensate.
Have all connections to the different elements of which the flue conduit is made of properly sealed and airtight.
Be as much as possible vertical; any angle from its axis must not exceed 45°.
Be installed at an adequate distance away from any combustible or flammable materials by means of an air flow or of an
insulating material.
Have an inner section preferably circular; we therefore recommend piping installed within square or rectangular chimneys
(which otherwise must have a 1-to-1.5 internal sizes max. ratio and a radius of curvature of the interior angles of at least 20
mm).
The interior section must be invariable, free from constrictions and independent.
A cleanout opening with a tight fitting lid under the connection betweeen the exhaust pipe and the appliance should be provided
for allowing access to the chimney flue for purposes of inspecting and removing solid materials and possible condensate.
The draught value indicated among the technical features of the appliance refers to Technical Norms and testing, so
as to guarantee the best thermal performances of the appliance (consumption, efficiency, emissions) in conformity
with the technical data declared and certified by the Institute in charge of the certification. A higher draught value
could provoke malfunctioning, high fuel consumption, overheating of the appliance body and cause annoying
noises in the firebox.
A chimney flue with an oversize section slows down the gas speed, makes unburnt by-products collect on its walls
and reduces the gas temperature, which produces a concentration of creosote in the chimney flue resulting in wood
start-up and combustion problems.
On the other hand, a chimney flue with an undersize section which does not allow the smoke to be easily carried out
of the appliance, may choke the combustion (and so put out the fire).
Caminetti Montegrappa assumes no responsibility over the appliance malfunction resulting from a bad designed
chimney flue and/or a chimney flue which has not been installed in compliance with the given requirements.
CAUTION: If there has been a fire in the flue it is necessary to turn the appliance off and call the fire department and
check whether the chimney stack and flue pipe have been visibly damaged. Make any repairs before any further use
of the combustion system.
TECH 3
ENGLISH
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