35
3.2.9. Hydraulic Connections
Before installation it is recommended to clean the system so as to remove any impurities that may come from the components, and which
might damage the circulator and the exchanger.
HEATING CIRCUIT
The delivery and the return heating lines must be connected to the boiler using the related 3/4” fittings
M
and
R
For the heating circuit pipes dimensions take into account the pressure losses induced by the radiators, by any thermostatic valves, by
shut-off valves of the radiators and by the system configuration.
It is appropriate to convey into the sewer discharge the safety valve fitted on the boiler. In the absence of such
a precaution, a possible intervention of the safety valve can cause the flooding of the room where the boiler
is installed.
The manufacturer cannot be held liable for damages caused by failure to observe this precaution.
HOT WATER FOR DOMESTIC USE CIRCUIT
The cold water inlet and outlet for domestic hot water use must be connected to the boiler to the related 1/2" fittings
C
and
F
The water hardness affects the frequency of cleaning and/or replacement of the secondary exchanger.
Depending on the water supply hardness, assess whether to install suitable equipment for domestic use with
metered feeding of food application products for the treatment of drinking water compliant to the applicable
rules.
In case of water supply having hardness over 20°F, the water treatment is always recommended.
The water coming from the municipal water softeners could not be compatible with some components of the
heating system due to its pH values.
CONDENSATION DRAIN
For the draining of the condensate comply with the laws and regulations in force herein fully applied.
Unless otherwise specified, the condensate produced in combustion phase has to be conveyed (through the condensate outlet spout) to
an exhaust system which flows out into the domestic waste discharge network that, due to their basicity, counterbalance the fume conden-
sate acidity. To avoid the return of bad smells from the domestic waste discharge network, it is recommended to add a drain trap between
the condensate drainage system and the domestic waste discharge network. The condensate draining system and the domestic waste
discharge network must be made from suitable materials resistant to the action of the condensation water.
The condensate draining system must be connected to the appropriate connection (A) prearranged on the boiler (see fig. 13).
It is strictly forbidden to connect the condensate draining system to the siphon inspection point (B).
The manufacturer declines any liability for damages caused to persons, animals or objects arising from failure
to comply with the indications above.
3.2.10. Connection to the power supply
The boiler must be connected to a 230V-50Hz power supply network.
When performing the connection, follow the polarity by connecting properly the phase and neutral.
During installation comply with the local regulations in force herein fully applied.
Upstream the boiler must be installed a bipolar switch, easily accessible, meant to allow cutting off the power supply and carry out in safety
conditions all maintenance operations.
The supply line of the boiler must be protected by a thermal magnetic differential circuit breaker having suitable breaking capacity. The
power supply network must have a safe earthing bounding. This fundamental safety requirement has to be checked and, in case of doubt,
an accurate check must be made on the electric system by qualified personnel.
The manufacturer cannot be held liable for any damages caused by lack of the earthing system: the gas ,
water and heating pipes must not be considered grounding points.
B
A
fig. 13
