Operating Position; Preparing The Boiler; Boring The Boiler Plate; Blast Tube Length - Riello RS 68/EV O2 ULX Installation, Use And Maintenance Instructions

4.4

Operating position

 The burner is designed to operate only in
positions 1, 2, 3 and 4 (Fig. 14).
 Installation 1 is preferable, as it is the only
one that allows the maintenance operations
WARNING
as described in this manual.
 Installations 2, 3 and 4 permit operation but
make maintenance and inspection of the
combustion head more difficult.
1
D7739
4.5

Preparing the boiler

4.5.1

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
thermal insulation screen supplied with the burner.
4.5.2

Blast tube length

The length of the blast tube must be greater than the thickness of
the boiler door complete with its fettling.
For boilers with front flue passes 13)(Fig. 16), a protection in re-
fractory material 11) must be inserted between the boiler
fettling 12) and the blast tube 11).
The refractory can have a conical shape (minimum 60°).
This protective fettling must not compromise the extraction of the
blast tube.
For boilers with a water-cooled front piece, a refractory lining 11)-
12)(Fig. 16) is not necessary, unless expressly requested by the
boiler manufacturer.
Installation
DANGER
2 3
mm
RS 68/EV O2 ULX
RS 120/EV O2 ULX
RS 160/EV O2 ULX
RS 200/EV O2 ULX
21 GB
 Any other position could compromise the cor-
rect operation of the appliance.
 Installation 5 is prohibited for safety reasons.
4 5
D 1
20149117
Ø
D1
260
260
320
320
Fig. 14
D F
D455
Fig. 15
DF Ø
325 M 16
325 M 16
368 M 16
368 M 16
Tab. M
20205796