Operating Position; Preparing The Boiler; Boring The Boiler Plate; Blast Tube Length - Riello GAS 8 P/M Installation, Use And Maintenance Instructions

5.4

Operating position

 The burner is set up to operate only in posi-
tions 1, 2, 3 and 4 (Fig. 11).
 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.
 Any other position could compromise the cor-
rect operation of the appliance.
 Installation 5 is forbidden for safety reasons.
DANGER
5.5

Preparing the boiler

5.5.1

Boring the boiler plate

Pierce the closing plate of the combustion chamber, as in Fig. 12.
The position of the threaded holes can be marked using the ther-
mal insulation screen supplied with the burner.
mm D1
GAS 8 P/M 265
GAS 9 P/M 300
GAS 10 P/M 350
D46
Installation
DF Ø
368 M16
368 M18
438 M20
Tab. F
Fig. 12
17
1 2
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 range of lengths available, L (mm), is as
follows:
Blast tube L mm
Extended head
Short head
Short head plus spacer
For boilers with front flue passes 9)(Fig. 13 on page 18), or flame
inversion chamber, a protection in refractory material 7) must be
inserted between the boiler fettling 8) and the blast tube 6).
This protection must not compromise the extraction of the blast
tube.
GB
3 4
Fig. 11
GAS 8 GAS 9 GAS 10
P/M P/M P/M
501 574
391 444
281 314
5
606
476
346
Tab. G
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