Combustion Head Setting - Riello C9161400 Installation, Use And Maintenance Instructions

4.9

Combustion head setting

In addition to varying air flow depending on the output requested,
the air gate valve servomotor 4)(Fig. 3) by means of a lifting as-
sembly - varies the setting of the combustion head.
This system allows an optimal setting even at a minimum firing
rate.
For the same servomotor rotation, combustion head opening can
be varied by moving the tie rod onto holes 1-2-3, Fig. 18.
The choice of the hole (1-2-3) to be used is decided on the basis of
diagram (Fig. 20) against the required maximum output.
Setting is pre-arranged in the plant for the maximum run (hole 3)
(Fig. 18).
When dealing with boilers featuring a strong back pressure, if air
delivery is insufficient even with the damper fully open, you can use
a different setting to that illustrated in diagram (Fig. 20) do this by
moving the tie rod onto the next highest index, thus increasing the
combustion head's opening and hence air delivery.
If combustion requirements require you to move spacer 1)(Fig. 19)
onto the 1 st or 2 nd hole of the gear and, at the same time, the hinge
is on the right, you need to fit the spacers 4)(Fig. 19) supplied with
the burner.
Proceed as follows:
➤ first unscrew nuts 2), remove tie rod 3), unscrew spacer 1) and
position it on the hole you want,
➤ screw the spacers 4) onto spacer 1) and screw 5) respectively,
➤ once done, refit the tie rod and nuts.
4
3
2
1
0
4545 6060
3
2
1
0
3030 4545 6060 7575
RLS 300/EV FGR
RLS 400/EV FGR
RLS 500/EV FGR
7575 9090 10605
Max burner output
RLS 650/EV FGR
RLS 800/EV FGR
9090 10605 12120 13634 15149
Max burner output
Installation
3
2
1
D3093
12120 13635 15150 16664
16664 18179 19694 21209
27 GB
D3409
D11258
M Bt u/ hr
18180 19695
22723 24238 25753 27268 28782 30298
0
4
Fig. 18
Fig. 19
D11259
M Bt u/ hr
Fig. 20
20037168