Setting The Combustion Head - Riello RS 190 Installation, Use And Maintenance Instructions

(A)
Nr. Notches
Burner output in 2nd stage operation
(C)
(D)

SETTING THE COMBUSTION HEAD

Installation operations are now at the stage
where the blast tube and sleeve are secured to
the boiler as shown in fig. (B). It is now a very
simple matter to set up the combustion head, as
this depends solely on the output developed by
the burner in 2nd stage operation.
It is therefore essential to establish this value
before proceeding to set up the combustion
head.
There are two adjustments to make on the
head.
Air adjustment (B) See diagram (C).
Turn screw 4)(B) until the notch identified is
aligned with the front surface 5)(B) of the flange.
Gas adjustment (A)
When the burner is installed for an output in 2nd
stage  1300 Mcal/h (about 1500 kW) assemble
the supplied disks 1)-2)(A) removing the inner
pipe 3)(A). If there is little gas in the network, the
D1267
(B) head may be left in standard configuration, limit-
ing the minimum modulation to 450 Mcal/h
(circa 520 kW).
Example
Burner output = 1593 kW (1370 Mcal/h).
If we consult diagram (C) we find that for this
output, air must be adjusted using notch 3, as
shown in fig. (B).
Continuing with the previous example, page 5
indicates that for burner with output of 1593 kW
(1370 Mcal/h) a pressure of approximately 8
mbar is necessary at test point 6)(B).
Once you have finished setting up the head, refit
the burner to the slide bars 3)(D) at approxi-
mately 100 mm from the sleeve 4)(D) - burner
positioned as shown in fig. (B)p. 6 - insert the
flame detection probe cable and the ignition
electrode cable and then slide the burner up to
the sleeve so that it is positioned as shown in
fig. (D).
D1268
Refit screws 2) on slide bars 3).
Secure the burner to the sleeve by tightening
screw 1).
Reconnect the articulation 7) to the graduated
sector 6).
D3037
7
Important
When fitting the burner on the two slide
bars, it is advisable to gently draw out
the high tension cable and flame detec-
tion probe cable until they are slightly
stretched.