Combustion Head Pre-Setting; Securing The Burner To The Boiler; Boring The Boiler Plate; Length Of The Blast Tube - Riello RL 70/E Installation, Use And Maintenance Instructions

4.5

Combustion head pre-setting

Disassemble the blast tube 9) from the burner 6) by proceeding as
follows:
– loosen the four screws 3) and remove the cover 1);
– remove the screws 2) from the two slide bars 5);
– remove the two screws 4) fixing the burner 6) to the flange 7);
– withdraw the blast tube 9) complete with flange 7) and slide
bars 5).
At this point check, whether the maximum delivery of the burner is
contained in area B or in area C of the firing rate. See Fig. 5.
If it is in area B then no operation is required.
If, on the other hand, it is in area C:
– unscrew the screws 1)(Fig. 11) and disassemble the blast
tube 5);
– unscrew the screws 3) and remove the shutter 4);
– tighten the screws 3) on the rod 2).
Now refit the blast tube 5) and the screws 1).
Once this operation has been carried out (if required), secure
flange 7)(Fig. 13) to the boiler plate inserting the supplied gasket
8)(Fig. 13).
4.6

Securing the burner to the boiler

4.6.1

Boring the boiler plate

Drill the combustion chamber mounting plate as shown in Fig. 12.
The position of the threaded holes can be marked using the head
gasket supplied with the burner.
4.6.2

Length of the blast tube

The length of the blast tube must be selected according to the indi-
cations provided by the manufacturer of the boiler, and in any case
it must be greater than the thickness of the boiler door complete
with its refractory.
The available lengths "L" are those indicated in the Tab. F.
Model Short blast tube
RL 70/E 7
For boilers with front flue passes 12)(Fig. 13) or flame inversion
chambers, protective insulaton material 10) must be inserted be-
tween the boiler refractory 11) and the blast tube 9).
This protective insulation must not compromise the extraction of
the blast tube. See Fig. 13.
For boilers having a water-cooled front the insula-
tion 10)-11)(Fig. 13) is not required unless it is re-
quired by the boiler manufacturer.
WARNING
Long blast tube
(with kit)
9 /32" 15 5 /32"
Installation
Use the 4 screws provided after having protected the thread with
an anti-seize product.
The burner-boiler seal must be airtight.
WARNING
inch
RL 70/E
Tab. F
D1219
17 GB
D690
D455
A B
9 /32" 27 /32" 13 /16"
7 10 - 12
Fig. 11
Fig. 12
C
1/2 W
Tab. G
Fig. 13
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