If it is an old system, it is
essential to flush the radiator
circuit before installing
the new boiler.
Warning: if the materials
used are of a different
nature, corrosion phenomena
may occur.
The heating surfaces can
consist of radiators,
convectors or air heaters.
The distribution network must be
calculated according to the
flow rate corresponding to
the power actually required,
without taking into account
the maximum power
11
A better comfort of use will be
obtained starting from 0.8 bar of
supply pressure.
When starting up the system, it
is possible to change this
inflation pressure in the event of
a different static load.
The section of the
pipes will be determined
according to the usual methods
based on the flow rate/pressure curve.
The permissible total water
volume for the heating
circuit will depend, among other
things, on the cold static load.
The expansion vessel
incorporated in the boiler is
delivered at a pressure of 0.5
bar (i.e. with a static load equal
to 5 mCE) and allows a
maximum volume of 110
liters for a
average temperature of
the radiator circuit of 75°C
and a maximum service
pressure of 3 bar.
supply pressure of 0.6 bar.
The boiler can operate with
minimal pressure
that the boiler is able to supply.
However, it is advisable to
provide for a sufficient flow
rate so that the
temperature difference between
the flow and return is less than
or equal to 20°C. The minimum
flow rate is 500 l/h.
Provide a drain cock at
the lowest point of the
system.
When using
thermostatic taps, pay
particular attention so
that they are not installed on all
the radiators, that taps are
installed in rooms with a
high free supply and that
instead they are never
installed in the room where the
room thermostat is fitted .
Themaclassic boilers can
be integrated into any type
of system: twin-pipe, single-
pipe in series or derivative…
taps with a large passage
section, in order to allow
sufficient flow.
It will be necessary to provide
for the installation of bleeders
at each high point of the
ducting, as well as on all the radiators.
Avoid pressure drops
as much as possible: limit the
number of bends, use
The distribution circuit must
be made with suitable
material.
The routing of the pipes
must be designed taking all
necessary precautions to avoid
the formation of air pockets
and to facilitate permanent
degassing of the installation.
In this case, it is recommended
to add an inhibitor to the
water in the heating circuit, in
the proportion indicated by the
supplier of the product:
this will prevent the production
of gases and oxides.
Heating
circuit
Sanitary circuit
Machine Translated by Google
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