Annual Service - Baxi Nuvola 3+ BS40 Operating And Installation Instructions

To optimise boiler efficiency, carry out the following annual controls:
• check the appearance and air-tightness of the gaskets of the gas and combustion circuits;
• check the state and correct position of the ignition and flame-sensing electrodes;
• check the state of the burner and make sure it is firmly fixed;
• check for any impurities inside the combustion chamber.
Use a vacuum cleaner to do this;
• check the gas valve is correctly calibrated;
• check the pressure of the heating system;
• check the pressure of the expansion vessel;
• make sure the flue and air ducts are unobstructed.
• check the state of the boiler anode.
WARNINGS
Before commencing any maintenance operations, make sure the boiler is disconnected from the power supply.
Afterwards, move the knobs and/or operating parameters of the boiler to their original positions.
Figure 16
WARNING
Pay great attention when dismantling the individual parts of the hydraulic assembly.
Do not use sharp tools, do not apply excessive force when removing the fixing clip.
INSTRUCTIONS FOR FITTERS

29. ANNUAL SERVICE

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