Ferroli DIVA D C24 Instructions D'installation, D'entretien Et D'utilisation page 48

3.3 Maintenance
IMPORTANT
ALL MAINTENANCE WORK AND REPLACEMENTS MUST BE CARRIED OUT
B
BY SKILLED QUALIFIED PERSONNEL.
Before carrying out any operation inside the boiler, disconnect the power
and close the gas cock upstream. Otherwise there may be a danger of explo-
sion, electric shock, suffocation or poisoning.
Periodic check
To ensure proper operation of the unit over time, have qualified personnel carry out a yearly inspection, providing for
the following checks:
• The control and safety devices (gas valve, flow switch, thermostats, etc.) must function correctly.
• The fume exhaust circuit must be perfectly efficient.
(Sealed chamber boiler: fan, pressure switch, etc. - The sealed chamber must be tight: seals, cable glands, etc.)
(Open chamber boiler: anti-backflow device, fume thermostat, etc.)
• The air-fume end piece and ducts must be free of obstructions and leaks
• The burner and exchanger must be clean and free of deposits. For cleaning do not use chemical products or wire
brushes.
• The electrode must be properly positioned and free of any deposits.
• The gas and water systems must be tight.
• The water pressure in the system when cold must be approx. 1 bar; otherwise bring it to that value.
• The circulating pump must not be blocked.
• The expansion vessel must be filled.
• The gas flow and pressure must match that given in the respective tables.
48
= =
fig. 14- Electrode positioning
cod. 3542B920 - Rev 07 - 06/2024
DIVA D C24
EN