Activating The Chimney-Sweep Function; Annual Service - Potterton Sirius FS 50 Installation, Operation & Maintenance Manual

18. activating the chiMney sweep Function
To facilitate measurement of the combustion efficiency 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
Figure 18
To ensure the boiler operates at peak efficiency, the following checks must be performed every year:
• Check on the appearance and tightness of the gas and combustion circuit gaskets;
• Check on the condition and position of the ignition and flame sensing electrodes (see section 16);
• Check on the condition of the burner and its fixing to the aluminium flange;
• Check for any dirt in the combustion chamber. Use a vacuum-cleaner for this cleaning operation;
• Check that the gas valve is calibrated correctly (see section 13);
• Check that there is no dirt in the siphon;
• Check on the central heating system pressure;
• Check on the central heating expansion vessel pressure.
InstructIons pertaInInG to the InstaLLer
buttons to exit the function

19. annual service

36
symbol (about 3
912.822.1 - GB