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After deciding the exact location of the boiler, make sure there is suf cient room to perform maintenance operations (at
least 450 mm of headroom is required in order to replace the expansion vessel).
Connect the system to the gas and water inlets present on the lower bar of the template. Fit two G3/4 taps ( ow and
return) on the central heating circuit; these taps make it possible to carry out important operations on the system without
draining it completely. If you are either installing the boiler on an existing system or replacing one, as well as the above,
t a settling tank under the boiler on the system return line in order to collect any deposits and scale circulating in the
system after ushing. After xing the boiler to the template, connect the ue and air ducts, supplied as accessories, as
described in the following sections.
If the model 24 MI - 24 natural draught boiler is installed, connected it to the ue with a metal pipe resistant to normal
mechanical stress, heat, products of combustion and relative condensate.
IMPORTANT
After lling the boiler, vent the entire internal circuit and the system as follows:
) to set the boiler in the "WINTER" operating mode;
After venting the boiler circuit, proceed with initial lighting.
EXPANSION VESSEL
The boiler features a standard 6-litre expansion vessel with a pre-charge pressure of 1 bar. The maximum volume of water in
the system is calculated according to hydrostatic pressure at an average water temperature of 80°C ( ow: 95°C return: 75°C).
Hydrostatic pressure (m)
Maximum system volume (l)
INSTALLATION INSTRUCTIONS
13. INSTALLAZIONE DELLA CALDAIA
14. INSTALLING THE BOILER
R" for at least 2 seconds;
5
6
110
105
7
8
9
95
85
77
75
10
70
71.06952.02 - EN
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