Riello GAS 3, Installation, Use And Maintenance Instructions, Page: 16 / 44

20144819 14 GB
Installation
5.4 Operating position
5.5 Preparing the boiler
5.5.1 Boring the boiler plate
Pierce the closing plate of the combustion chamber, as in Fig. 8.
The position of the threaded holes can be marked using the ther-
mal insulation screen supplied with the burner.
Tab. D
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, is as fol-
lows:
Tab. E
For boilers with a front flue gas wash 9)(Fig. 9) or flame inversion
chamber, a protection device in refractory material 7) must be in-
serted between the boiler refractory 8) and the blast tube 6).
This protective fettling must not compromise the extraction of the
blast tube.
WARNING

The burner is set up only to operate in posi-
tions
1, 2, 3 and 4 (Fig. 7).

Installation 1 is preferable, as it is the only
one that allows the maintenance operations
as described in this manual.

Installations 2, 3 and 4 permit operation but
make maintenance and inspection of the
combustion head more difficult.
DANGER

Any other position could compromise the cor-
rect operation of the appliance.

Installation 5 is prohibited for safety reasons.
Fig. 7
2 3 4 5 1
D7739
mm A B C D
GAS 3 155 160 160 M10
GAS 4 165 160 160 M10
GAS 5 165 160 160 M10
GAS 6 185 195 195 M12
Fig. 8
D46
Blast tube
L mm GAS 3 GAS 4 GAS 5 GAS 6
Shortened 43 45 65 85
Standard 185 187 207 227
Elongated 320 320 365 360