MCZ Forma PURO 115 - Manual (Page 8)

Chapter 2
INSTALLATION AND USE MANUAL
page
8
Theoretical notions for installation Technical service – MCZ S.p.A. all rights reserved - Reproduction prohibited
2.4. CONNECTION TO THE FLUE PIPE
The connection to the flue pipe is a very important element. The
connection must be made with a great deal of care; in the event of
erroneous or anomalous construction, it is extremely difficult to remedy
without damaging the hood liner. In addition, the connection is made in
a part of the stove where temperatures are very high, and for this
reason it is important to use materials that are capable of resisting heat
and also the acidity of the fumes produced by combustion.
Before beginning work, please note the following:
• The connecting pipe must have a maximum slope of 45
degrees. This is to avoid excessive deposit of condensation
produced in the initial phases of lighting the fireplace stove,
and/or the excessive accumulation of creosote. It also keeps
the release of smoke from being slowed down.
• The connections must be made of stainless steel 316
with a minimum thickness of 10/10, or in aluminised
steel, minimum thickness 20/10. It is prohibited to use
stainless steel or aluminium hoses as they compromise
the safety of the connection and are subject to tears
and gaps, causing leakage of smoke.
• The components making up the connecting pipe must be
perfectly sealed.
• The joint to the flue pipe must not be too long (to avoid
obstructions), nor too short (to avoid smoke leakage).
If metal connecting pipes are used, they must be
insulated with suitable material such as ceramic fibre
matting, to avoid deterioration of the masonry and of
the decorative hood liner.
IMPORTANT!
Any increase in the section of the connecting pipe
must start immediately above the hood of the
fireplace and not along the flue pipe section.
2.5. FLUE PIPE
The flue pipe is a fundamental element in discharging smoke and
therefore must have the following requisites:
• It must be waterproof and thermally insulated.
• It must be made with heat resistant materials, resistant to
combustion products and any condensation.
• It must have a vertical slope with axis deviations not over 45°
and without narrowing.
• It must meet the requisites indicated in the technical table for
the internal chimney section and height.
• It must preferably have a circular interior section.
• If pre-existing and previously used, it must be cleaned.
The flue pipe is of primary importance for the correct
functioning and safety of your fireplace stove.
Example of fireplace stove connection
Illustration of a correctly constructed flue
pipe with a chamber and sealed door for
solid combustion product collection and
discharge at the foot of the external
ascending segment.
Smoke
connection
Ceramic fibre
insulation
Flue pipe
Hood grille
45° max