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Instructions for the installer
3.15 CONNECTING THE FLUE
Condensing boilers produce ue products at very low temperatures,
generally below 84°C (approx). It is therefore necessary that the ue
is impervious to the condensate produced and built with suitable
corrosion-resistant materials.
e connecting joints must be sealed and equipped with suitable gaskets
to stop condensation from leaking out and air from getting in.
In terms of ue section and height, it is necessary to refer to national
and local regulations in force.
Refer to regulations in force for sizing.
In order to avoid the formation of ice during operation, the temperature
of the inside wall at every point in the ue system, for its entire length,
must not drop below 0°C.
e ue system must comply with local and national regulations.
e ue system must be built using materials that are resistant to the
combustion products, typically 316 certied stainless steel or plastic
materials, such as PVDF (polyvinyldimethyluoride) or PPS (simple
translucent polypropylene) or other materials with the same features.
e supplier is excluded from any contractual and
extra-contractual liability for damage caused by
errors in installation and use and nevertheless due
to failure to observe the instructions provided by
the manufacturer.
Model Modules Ø ttachment
150 3 150
200 4 150
250 5 200
300 6 200
350 7 200
Instructions for the installer
3.9 SYSTEM FILLING AND EMPTYING
When all system connections have been completed, the
circuit can be lled.
To ll the system, you must provide a lling valve on
the system's return.
ATTENTI
ON!
Do not mix the he
a
t
ing wa
t
er w
ith a
n
t
if
r
eeze or anti-
corrosion substances at incorrect concentrations!
is may damage gaskets and cause noise to develop
during operation.
Alpha will not be held liable in case of damage
caused to people, animals or property due to failure
to observe the above.
Once all of the system connections have been made, it is possible to
fill the circuit.
To fill the system install a temporary filling loop and
pressurisation unit to the system return pipe, in conjunction with
a correctly sized expansion vessel/s. Never use a pressurisation
unit to fill the system.
The boiler is fitted with a drain point, as shown in Section 2.2 This
must never be used to drain the complete system, as dirt contained
in the system may accumulate in the boiler, preventing smooth
operation. Accordingly, the system must be equipped with its own
drain point/s.
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