Activating The Ue-Sweeper Function; Annual Service - Baxi HT 1.850 Installation, Operation And Maintenance Manual

18. ACTIVATING THE CHIMNEY SWEEP FUNCTION
To facilitate measurement of the combustion ef ciency and improve the cleanliness of the production products,
the chimney sweep function can be activated by proceeding as described below:
1) press the (2-3) together until the pointer " " appears on the display alongside the
seconds but no more than 6 seconds). In these conditions, the boiler operates at the maximum heat output
in central heating mode.
2) press either of the buttons to exit the function
Figure 16
To optimise boiler ef ciency, 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 ame-sensing electrodes;
• check the state of the burner and make sure it is rmly xed;
• 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 ue and air ducts are unobstructed;
• check for any impurities inside the siphon tted on certain boilers;
• check the magnesium anode, where present, for boilers tted 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.
ISTRUCTIONS PERTAINING TO THE INSTALLER
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19. ANNUAL SERVICE

32
symbol (about 3
910.026.1 - EN (AUS)