Riello Burners Gulliver RS5D Installation, Use And Maintenance Instructions page 35

REMOVING HEAD ASSEMBLY, (see fig. 9, page 8)
To remove the head assembly, carry out the following operations:
Remove the head-holder assembly (1), after taking away the screws (7), disconnect the connections (3 and
5), extract the small tube (4) and loosen the screws (8).
Do not modify the setting position of the bracket-elbow during the disassembly.
REASSEMBLY OF THE HEAD SYSTEM, (see fig. 9, page 8)
Warning
During the reassembly of the system, tighten the screws (7) completely (without locking them) ; then
lock them with a torque wrench setting of 3 - 4 Nm .
Control that, during the working, there are not gas losses coming from the screws.
If casually the pressure test point (9) looses, fix correctly and be sure that the hole (F), placed in the external
side of the head-assembly (1) turns towards the lower part.
4.3 SETTING OF THE AIR DAMPER ACTUATOR
FIRST STAGE
CAM I
By adjusting the micrometric screw, cam I regulates the
st
position of the 1 stage air damper (factory setting ref-
erence value 25°).
SECOND STAGE
CAM II and III
Cam II regulates the position of the 2
(factory setting reference value 60°, do not exceed 65°).
Cam III is used to open the 2
ting reference value 45°).
It must always be at least 15° in front of cam II.
CAM V
Cam V is factory set (factory setting reference value 90°).
Do not modify this setting for any reason.
Warning:
For power adjustment at 1
– the power ratio between 1
– in any case, the minimum burner power at 1
4.4 COMBUSTION CHECK
It is advisable to set the burner according to the type of gas used and following the indications of the table:
EN 676
Theoretical max. CO
GAS
0 % O
G 20 11.7
G 25 11.5
G 30 14.0
G 31 13.7
2814
nd
stage air damper
nd
stage valve (factory set-
st nd
and 2 stage, apply the following indications:
st nd
and 2 stage must be 1 : 2 at a maximum;
st
AIR EXCESS: max. output λ ≤ 1.2 – min. output λ ≤ 1.3
Setting CO
2
λ = 1.2
2
9.7
9.5
11.6
11.4
D4360
Micrometric screws
stage must not be less than the firing rate range.
%
2
λ = 1.3
9.0
8.8
10.7
10.5
9 GB
NO
CO
mg/kWh
mg/kWh
≤ 100 ≤ 170
≤ 100 ≤ 170
≤ 100 ≤ 230
≤ 100 ≤ 230
x