Riello DB3 SM C03 Installation, Use And Maintenance Instructions page 42

3.4 Accessibility to the interior of the combustion head
• Switch off the electrical power.
• Unscrew the locknuts 6)(Fig. 16) and release the tie rods 7-8).
• Disconnect the servomotor socket X1).
• Disconnect the electrode wires 2) after removing the cover 12).
• Remove the 8 fixing screws 1) and the protections 3-4).
• Remove the fixing screws 11).
• Detach the suction duct 5) of the burner, as shown in Fig. 16.
• 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).
1
7
6
5
12
20098804
2
CHAPTER
3
1
10
12
6
4
3
Installation
11
8
11
X1
Fig. 16