13
20098582
GB
Installation
5.4
Operating position
5.5
Preparing the boiler
5.5.1
Boring the boiler plate
Drill the combustion chamber locking plate as shown in Fig. 8.
The position of the threaded holes can be marked using the ther-
mal screen supplied with the burner.
Tab. F
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:
Tab. G
For boilers with front flue passes 9)(Fig. 9) or flame inversion
chambers, protective fettling in refractory material 7) must be in-
serted between the boiler's fettling 8) and the blast tube 6).
WARNING
➤
The burner is designed to operate only in
positions 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
S9272
mm
A
B
C
C
PRESS GV
155
160
160
M10
Fig. 8
D329
mm
Shortened
Standard
Lengthened
PRESS GV
43
185
320
WARNING
This protective fettling must not compromise the
extraction of the blast tube.