De Dietrich MS 24 BIC - Инструкция по эксплуатации - Страница 81

80

71.06199.02 - EN

INSTALLATION INSTRUCTIONS

To optimise boiler eficiency, 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 lame-sensing electrodes;

•   check the state of the burner and make sure it is irmly ixed;

•   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 lue 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.

28. ANNUAL SERVICE

TIPS

For the eficient operation of the expansion vessel, the pressure of the water supply must be lower than 4 bar. If it is not, 
install a pressure reducer. Adjust the pressure reducer to obtain a water supply pressure less than 4 bar.

DRAINING THE BOILER CIRCUIT

Drain the boiler by opening the tap in the hydraulic assembly. 
To drain the boiler using the drain tap located at the bottom, proceed as follows (ig. 14):
-   close the boiler on/off valves;
-   open the drain tap using an 8 mm hex wrench;
-   drain the boiler;
-   close the drain tap using the 8 mm hex wrench.

29. DRAINING THE BOILER CIRCUIT AND THE STORAGE BOILER

Figure 14