Operating Position; Preparing The Boiler; Boring The Boiler Plate; Blast Tube Length - Riello RLS 120/E FGR Installation, Use And Maintenance Instructions

5.4

Operating position

 The burner is designed to operate only in
positions 1, 2, 3 and 4 (Fig. 12).
 Installation 1 is preferable, as it is the only
one that allows the maintenance operations
WARNING 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
5.5

Preparing the boiler

5.5.1

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.
5.5.2

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.
The available lengths L are those indicated in the table below.
Blast tube (mm)
RLS 120/E FGR
For boilers with a front flue gas passes 13)(Fig. 15 on page 19)
or flame inversion chamber, a protection device in refractory ma-
terial 11) must be inserted between the boiler fettling 12) and the
blast tube 10).
This protective fettling must not compromise the extraction of the
blast tube.
For boilers with a water-cooled frontal, a refractory lining is not
necessary 11)-12) unless expressly requested by the boiler man-
ufacturer.
20168262
Installation
2 3
mm
Short
RLS 120/E FGR
245
Tab. J
18 GB
 Any other position could compromise the cor-
rect operation of the appliance.
 Installation 5 is prohibited for safety reasons.
DANGER
4
A
230
5
Fig. 12
D455
Fig. 13
B C
325-368 M 16
Tab. K