Unical MODULEX EXT 100, Installation And Servicing Instructions

Page: 27 / 56

27
Instructions for the installer
3.17 - CONNECTION TO THE CHIMNEY
In a condensing boiler the smokes are evacuated at a very low
temperature (Max about 84°C). Then it is necessary that the
chimney is perfectly impermeble to the condensate of the com-
bustion products and is made of materials corrosion resi-stant.
The different spigot joints must be well sealed and equipped with
suitable gaskets, in order to prevent the outlet of condensate
and the inlet of air.
Concerning the cross section and the height of the chimney, it
is necessary to make reference to the national and local rules
in force.
For the dimensioning follow the instruction in pr EN 13384.
In order to prevent, during the operation, the formation of ice,
the temperatureof the internal wall of the combustion product
evacuation system, in all its length, has not to be below 0°C.
For condensation operating conditions of the appliance at the
external design temperature, it will be necessary to foresee a
condensate evacuation system, discharging, according to the
installation condition, in the boiler condensate tray or in another
dishpan separated from it.
In the construction of the flue duct it is necessary to use
materials resistant to the combustion products, in class W1,
according to EN 1443, as stainless steel or plastic certified
materials.
As PVDF (polyvinildimethylfluorure) or PPS (polypropylene
transparent simple) certified for this use. Other materials ant
thicknesses are also autorized provided they can guarantee, at
least, equivalent characteristics.
Any contractual or extra-contractual respon-
sibility of the supplier, for damages caused
by mistakes in the installation and in the use,
and, in any case, due to the non respect of the
instructions given by the suplier, is excluded.
For fixing the flue manifold use the 6 x nuts CH 10
and washers supplied in the plastic bag.
Smoke plug outlet have to be positionned on the
rectilinear lenght into the 1st meter of the boiler
In order to fit the combustion gases sample test
nipple, drill a hole Ø 21 mm in the smoke outlet and
fit the test nipple following the indicated sequence.
3.18 - FLUE MANIFOLD CONNECTION