Riello DB3 SM C01 TC FS1 A0 T250, Installation, Use And Maintenance Instructions, Page: 31 / 64

9
3
Installation
3.1 Removal of the locking screws from the
shutter
Remove the screws and the nuts 1) and 2), before installing the burner on
the boiler. Replace them with the screws 3) M12 X 25 supplied with the
burner.
3.2 Blast tube length (Fig. 11)
The length of the blast tube must be selected according to the indications
provided by the manufacturer of the boiler, and in any case it must be
greater than the thickness of the boiler door complete with its fettling. For boilers with front flue passes 1) or flame inversion
chambers, protective fettling in refractory material 5) must be inserted between the boiler fettling 2) and end cone 4). This protec-
tive fettling must not compromise the extraction of the blast tube. For boilers having a water-cooled front the refractory fettling 2)-
5)(Fig. 11) is not required unless it is expressly requested by the boiler manufacturer.
3.3 Securing the burner to the boiler (Fig. 11)
• Prepare an adequate system of hoisting by hooking onto the rings 3).
• Slip the thermal protection (standard equipment) onto the blast tube 4).
• Place entire burner on the boiler hole arranged previously and fasten with the screws given as standard equipment.
The coupling of the burner-boiler must be air-tight.
Fig. 10
1
2
1
2
3
3
D12015
1
1
2
5
4
3
3
Fig. 11
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