TOR
17
cod. 3542B750 - Rev 05 - 07/2022
EN
3.3 REPAIRS
B
The following operations must be performed solely by the competent personnel, such as the local di-
stributor or the service provider.
The appliance must be serviced regularly by a competent, qualified person.
Only a competent engineer can remove the appliance case and carry out any work.
3.3.1 Seasonal inspection of electric heating unit
The following checks to the electric heating unit are recommended at least once a year:
• The control system and the protection system (three phase fuse, electric connections tightening, temperature sensors
and safety elements etc.) should work properly.
• Check and clean the heating elements of any limestone deposits.
• When cold, the pressure inside the installation should be 1 bar. Otherwise, adjust the reference value.
• Check and restore the expansion vessel’s air cushion, if needed; the pressure should be 0.9-1 bar.
• Check the proper operation of the circulating pump.
• Check the wiring’s and connection strip’s integrity; they should not have damages due to heating.
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