Activating The Chimney-Sweeper Function; Annual Maintenance - Baxi LUNA HT 1.850 Installers And Users Instructions

19. ACTIVATING THE CHIMNEY-SWEEPER FUNCTION

To facilitate measurement of the combustion efficiency and improve the cleanliness of the production products, the flue-
sweeper function can be activated by proceeding as described below:
1) press the (2-3) together until the pointer " " appears on the display alongside the
no more than 6 seconds). In these conditions, the boiler operates at the maximum heat output set for central heating.
2) press either of the buttons to exit the function
Figure 17
To optimise boiler efficiency, carry out the following annual controls:
• check the appearance and airtightness 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;
• check the fan works correctly;
• make sure the flue and air ducts are unobstructed;
• check for any impurities inside the siphon fitted on certain boilers;
• check the magnesium anode, where present, for boilers fitted with storage boilers.
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.
INSTRUCTIONS PERTAINING TO THE INSTALLER

20. ANNUAL MAINTENANCE

33
symbol (about 3 seconds but
910.024.1 - EN (AUS)