Beretta NOVELLA 24-31 RAI PV, Руководство по установке

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INST
ALLA
TION
MANUAL
14
3 INSTALLATION
3.1
Installation standards
The boiler must be only be installed by qua-
lified personnel in conformity to the following
reference standards:
- UNI-CIG 7129
- UNI-CIG 7131
- IEC 64-8.
Installers must also ensure conformity to fire
prevention standards, gas safety standards
and local bylaws.
3.2
Place of installation
Novella RAI
boilers must be installed in
rooms with vents that conform to applicable
technical standards and safety legislation.
a
Boilers must be installed indoors. They
are not designed for outdoor use and
are not fitted with automatic frost protec-
tion devices.
IMPORTANT
Before installing the boiler, thoroughly flush
out all pipes to remove any dirt and deposits
that could compromise the correct functioning
of the boiler.
Install a water collector under the safety valve
and connect it to the nearest drain to evacua-
te any water coming out of the safety in the
event of overpressure. The domestic hot water
circuit does not require a safety valve but the
installer should nevertheless check that the
water supply pressure does not exceed 6 bar.
If necessary, install a pressure reducer.
Before lighting the burner for the first time,
make sure that the boiler is configured for
use with the type of gas supplied. The type
of gas is specified on the packaging label
and on the boiler’s own name plate.
Make sure that the flue is able to withstand
the temperature of the flue gases and that it
has been designed and made in conformity to
applicable standards. The flue must also be as
straight as possible, sealed, insulated and not
blocked or choked.
3.3
Installation in existing systems
Perform the following checks before installing
Novella boilers in existing systems.
- Check that the flue is large enough and
suitable for the characteristics of the boiler.
- Check that the characteristics of the boiler’s
pump (see the graph on page 12) are suita-
ble for the existing system. Existing pumps
are no longer needed.
- Make sure that the central heating circuit
has been flushed out to remove all sludge
and limescale, and that it has been properly
de-aerated.
- Make sure that the system is fitted with
safety and control devices that conform to
applicable legislation and standards.
- Check the hardness of the water supply
to ascertain whether a softening system is
required.
Refer to the following values.
REFERENCE VALUES
pH 6-8
Electrical conductivity less than 200 mV/cm (25°C)
Chlorine ions
less than 50 ppm
Sulphuric acid ions less than 50 ppm
Total iron less than 0,3 ppm
Alkalinity M less than 50 ppm
Total hardness 35° F
Sulphur ions none
Ammonia ions none
Silicon ions less than 30 ppm