15
Instructions for the installer
3.7 - CHIMNEY FLUE CONNECTION
In condensing boilers the flue gases are evacuated at a very
low temperature (max about 84°C). Therefore the chimney
must be perfectly impermeable to the condensate of products
of combustion and built with suitable materials which are resi-
stant to corrosion.
The different spigot joints must be well sealed and equipped
with suitable gaskets, in order to prevent the outlet of conden-
sate and the inlet of air.
Furthermore ensure that the possible condensate or rain wa-
ter coming from the chimney does not
enter the boiler's flue chamber.
Refer to applicable regulations while determining the size
and height of the flue.
In order to prevent the formation of ice during normal boiler
operation, the temperature of the internal wall of the combu-
stion product evacuation system, in all its length, has not to be
below 0°C.
The flue must be installed in accordance with the recommen-
dations of local and national codes of practice.
The flue pipe must be built using materials resistant to pro-
ducts of combustion, in Class W1, in accordance to EN 1443,
in stainless steel or certified plastic. This can be PVDF
(polyvinylidene fluoride) or PPS (Polyphenylene sulfide) or
otherwise aluminium or different materials but with equiva-
lent characteristics which comply to the regulations in force.
3.6 - BOILER LOCATION
The boiler must be installed in accordance with the relevant
requirements of the Gas Safety Regulations, current I.E.E.
Regulations, local water authority by e-laws and it should also
comply with any relevant requirements of the local gas sup-
plier, local authority and the relevant Standard Codes of Prac-
tice and building regulations.
The boiler house must be ventilated via permanent openings
having a total surface not inferior to 1/30th of the floor area of
the boiler house, with a minimum of 0.5 m
2
It is advisable to install the boiler as close as possible to the
chimney connection on a non combustible floor (i.e. concrete
or brick).
To facilitate cleaning of the flue circuit the boiler must have
sufficient clearance space in front, not less then the length of
the boiler body and, in any case, never less then 1300 mm.
When the door is open 90° the distance between the door
and the adjacent wall must be at least equal to the burner
length.
The surface must be flat, level, and of a suitable load bearing
capacity to support the weight of the boiler (when filled with
water - see general data table).
If the boiler is mounted on a plinth then the dimensions (see
Frame 2) of the plinth must be at least CxZ (refer to the table
dimensions).
Once the boiler has been installed it must be perfectly hori-
zontal and stable (to avoid vibrations and noise).
1000
X
XX
XX
600
600
X = not less then the length of the boiler body (dimensions
given in millimetres); in any case never less than 1300 mm.
XX = see instructions.