Ver 2_ES_EN_FR_IT_PT
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4.- CONNECTION OF THE WATER HEATER TO THE ELECTRIC NETWORK.
Prior to the connection to the electric network the connection cable must be built in. For it the protection
plate must be removed from the water heater. The connection of water heater to the electric network must be
performed according to standards for electric installation. Because the water heater has no components which
would permanently separate it from the electric network, upon the cable connection between it and permanent
installation a switch must be installed which breaks both power supply poles having between the open contacts a
gap at least 3 mm wide.
The below drawing shows the electrical water heater diagram:
Fig. – 4 NOFER – SB electrical diagram.
5.- ELECTRICAL CONNECTIONS STANDARDS.
The electrical installation must fulfil the international standards CEI 64-8. According to this standards,
electrical appliances must be installed following the below indications at bathrooms and WC:
1.- zone 0: Installation is totally forbidden at this area. It is also forbidden at zone 1 if it is a prefabricated shower
cabin.
2.- zones 1 and 2: IPX4 appliances with a wire which allows connections 1,2 m from shower vertical and with an
additional RCS switch.
3.- zone 3: IPX1 appliances allowed.
4.- The earth connection of the water heaters is compulsory.
We recommend the installation of the water heaters at zone 3 (fig.- 5).
