Annual Service; Draining The Boiler Circuit And The Storage Boiler - De Dietrich MS 24 BIC FF Notice D'installation, D'utilisation Et D'entretien

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TIPS
For the efficient 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.
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;
• check the fan works correctly;
• 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.

29. DRAINING THE BOILER CIRCUIT AND THE STORAGE BOILER

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 (fig. 14):
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close the boiler on/off valves;
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open the drain tap using an 8 mm hex wrench;
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drain the boiler;
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close the drain tap using the 8 mm hex wrench.
Figure 14
INSTALLATION INSTRUCTIONS

28. ANNUAL SERVICE

80
71.06199.02 - EN

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Ms 24 bic

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