Pag. 48/72
Electric connection
Before connecting the appliance, it is necessary to check that the voltage of the power supply
available corresponds to the voltage the appliance has been set for. In the event that they do not
correspond, if voltage change is possible, it is necessary to modify the connection as shown in the
provided wiring diagram. The terminal blocks are situated behind the instrument board and it is
possible to reach it by unscrewing the screws that fix the panel to the appliance. For the model
286710 - 286720: the terminal blocks (4) are placed under the base (3), as shown in picture 20 at
page 7 and they can be reached by unscrewing the screws (2) that fix the yoke (1).
Moreover, the efficiency of the earth connection must be checked, that the earth conductor on the
connecting side is longer than the other conductors, and that the connecting cable has a wire bunch
adequate for the power absorbed by the appliance and is at least type H05 RN-F. As in
international provisions, before installing the appliance a unipolar device must be installed
with a contacts opening of at least 3mm that must not interrupt the YELLOW-GREEN earth
wire. The device must be installed near the appliance, it must be approved and have adequate
capacity for the absorption of the appliance (see technical features).
The appliance must be connected to the EQUIPOTENZIALE system. The connector is situated near
the entry of the electric cable; it is marked by a label with the symbol shown in picture 10 (page 5).
When using a safety switch for fault currents, the following should be observed.
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According to current legislation, these kind of appliances can have a leakage current of 1mA
per kW of rated power input with no maximum. It should also be noted that all fault current
protection switches available on the market have a current tolerance of less than 50%;
therefore, a suitable switch should be chosen.
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Connect only one single appliance to each switch.
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In some cases, after long periods of inactivity or with a new installation, it is possible that
the appliance trips the safety switch when it is turned on. The reason for this is usually
moisture in the insulation. The problem can be solved by a short pre-heating that bypasses
the safety thermostat.
Water supply connection
Connect the water inlet pipe to the water mains, in accordance with the norms in force.
Checking gas tightness and pressure (fig. 11, p. 5)
Before proceeding to check the pressure, it is necessary to check the tightness of the gas installation
up to the nozzle with a leak-finder spray to ensure that no damage has been done to the appliance
during transportation. Then it is possible to proceed with checking the inlet pressure, which is done
by means of a gauge for liquids, either a "U" gauge or an electronic gauge with a minimum
definition of 0.1 mbar. In order to carry out the reading, the screw (1) must be removed from the
pressure outlet (2) and the rubber pipe of the gauge connected. Open the gas supply valve of the
appliance, check the pressure output and close the valve. Remove the pipe of the gauge and put
back the screws correctly into the pressure outlet. The pressure valve must be within the minimum
and maximum values shown below:
