Operating Position; Preparing The Boiler; Boring The Boiler Plate; Head Length - Riello 20148874 Installation, Use And Maintenance Instructions

5.4

Operating position

 The burner is designed to operate only in
positions 1, 2, 4 and 5 (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, 4 and 5 allow operations to be
performed, but make maintenance and
inspection of the combustion head more diffi-
cult.
 All the positions require the installation of the
gas valve with coils facing upwards or hori-
zontally (Fig. 14).
5.5

Preparing the boiler

5.5.1

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 ther-
mal insulation screen supplied with the burner.
mm A
RX 700 S/PV 240
RX 850 S/PV 240
RX 1000 S/PV 240
5.5.2

Head length

The length of the head must be selected according to the indica-
tions provided by the manufacturer of the boiler, and in any case
the combustion area must be greater than the thickness of the
boiler door complete with refractory.
The burners cannot be used on flame inversion
boilers.
WARNING
It is possible to insert a protective device made of refractory
material between the combustion head and the boiler refractory.
This protective device must allow the blast tube to be taken out
(Fig. 16).
Do not insert the protection in line with the elec-
trode unit, as this would compromise its good op-
eration.
WARNING
20152192
1 2
20075311
B C D
325 ÷ 275 M10 135
325 ÷ 275 M10 135
325 ÷ 275 M10 135
Installation
 Any other position could compromise the cor-
 Installation 3 is prohibited for safety reasons.
 Installation with the coils pointing downwards
DANGER
3
E
75
75
75
Tab. N
20056488
mm
RX 700-850-1000 S/PV
22 GB
rect operation of the appliance.
is absolutely forbidden.
4 5
D3367
Non-combustion area
Fig. 14
Fig. 15
Fig. 16
180
Tab. O