Operating Position; Removing The Shutter Lockout Screws; Preparing The Boiler - Riello DB 12 LSM C13 Installation, Use And Maintenance Instructions

5.4

Operating position

➤ The burner is designed to work only in posi-
tions 1 and 4 (Fig. 11).
➤ Installation 1 is preferable, as it is the only
one that allows the maintenance operations
WARNING
as described in this manual.
➤ The installation 4 permits the operation, but
makes the maintenance and inspection oper-
ations of the combustion head more difficult.
1
S9475
5.5

Removing the shutter lockout screws

Remove the screws 1)-2) and nuts before fitting the burner onto
the boiler (Fig. 12).
Replace them with the screws 3) M12x16 supplied as standard.
5.6

Preparing the boiler

5.6.1 Boring the boiler plate
Pierce the closing plate of the combustion chamber, as in Fig. 13.
The position of the threaded holes can be marked using the ther-
mal insulation screen supplied with the burner.
5.6.2 Blast tube length
The length of the blast tube must be selected according to the in-
dications provided by the manufacturer of the boiler, and in any
case it must be greater than the thickness of the boiler door com-
plete with its fettling.
For boilers with front flue passes (Fig. 15), or with a flame inver-
sion chamber, use a protection made out of refractory material
that allows the blast tube to be removed.
For boilers with a water-cooled front a refractory lining is not nec-
essary unless expressly required by the boiler manufacturer.
20119307
Installation
2 3
16 GB
➤ Any other position could compromise the cor-
rect operation of the appliance.
➤ Installation 5 is prohibited for safety reasons.
DANGER
4
1
2
2
1
420 DB 9
470 DB 12
5
3
3
D12015
4 3 0
D3973
Fig. 11
Fig. 12
Fig. 13