Riello DB 3 SM C01 TC A180 FS1 T250 Installation, Use And Maintenance Instructions page 30

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CHAPTER Installation
3.4 Accessibility to the interior of the combustion head (Fig. 12)
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Fig. 12
• Switch off the electrical power.
• Unscrew the locknuts 6) and release the tie rod 8.
• Disconnect the servomotor socket X1.
• Disconnect the electrode wire 2) after removing the cover 12) .
• Remove the 8 fixing screws 1) and the protections 3-4).
• Remove the fixing screws 11).
• Open burner at hinge (see Fig. 12).
• Turn the under part of the elbow 9) anticlockwise until it comes free of its slot.
• Unscrew screw 10) with pressure test point.
• Extract the internal part 13) of the combustion head.
• With burner closed, the accessibility to the interior combustion head is possible by removing the cover 12).
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