Operating Position; Removing The Shutter Lockout Screws; Preparing The Boiler; Boring The Boiler Plate - Riello RS 300/EV BLU Installation, Use And Maintenance Instructions

5.4

Operating position

 The burner is designed to operate only in
positions 1, 2, 3 and 4 (Fig. 13).
 Installation 1 is preferable, as it is the only
WARNING one that allows the maintenance operations
as described in this manual.
 Installations 2, 3 and 4 permit operation but
make maintenance and inspection of the
combustion head more difficult.
 Any other position could compromise the cor-
rect operation of the appliance.
 Installation 5 is prohibited for safety reasons.
DANGER
5.5

Removing the shutter lockout screws

Remove the screws 1)-2) and nuts before fitting
the burner onto the boiler (Fig. 14).
Replace with the screws 3) M12 x25 supplied as
WARNING
standard.
5.6

Preparing the boiler

5.6.1

Boring the boiler plate

Pierce the closing plate of the combustion chamber, as in Fig. 15.
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 1)(Fig. 16) or flame inversion
chamber, a protection in refractory material 5) must be inserted
between the boiler fettling 2) and the blast tube 4).
This protective fettling must not compromise the extraction of the
blast tube.
For boilers with a water-cooled front piece, a refractory lining 2)-
5)(Fig. 16) is not necessary, unless expressly requested by the
boiler manufacturer.
Installation
1
1
2
2
1
mm
RS 300/EV BLU
RS 400/EV BLU
RS 500/EV BLU
RS 650/EV BLU
RS 800/EV BLU
19 GB
2 3 4
D7739
D12015
D455
A B
350 452
350 452
390 452
400 495
400 495
5
Fig. 13
3
3
Fig. 14
Fig. 15
C
M18
M18
M18
M18
M18
Tab. H
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