Setting Of The Servomotor; First Stage; Second Stage; Combustion Check - Riello Gulliver RS5D Instrucciones De Instalación, Montaje Y Funcionamiento

REMOVING HEAD ASSEMBLY, (see fig. 9, page 9)
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 9)
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 SERVOMOTOR,

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 50°, do not exceed 65°).
Cam III is used to open the 2
ting reference value 35°).
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.
ATTENTION
st nd
To adjust 1 and 2 stage output, follow the instructions below:
Output ratio between 1
nd
Example: 2 stage output required 340 kW;
st
Minimum 1
Whatever the case, the burner's minimum 1
the operating range.
nd
Example: 2 stage output required 250 kW;
st
Minimum 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
3087
nd
stage air damper
nd
stage valve (factory set-
st nd
and 2 stage must be no more than 1:2.
stage output no less than 170 kW.
st
stage output no less than 160 kW (minimum in the firing rate page 4).
AIR EXCESS: max. output λ
Setting CO
2
λ = 1.2
2
9.7
9.5
11.6
11.4
(see fig. 10)
Fig. 10
D4360
Micrometric screws
stage output must not be lower than the value indicated in
%
2
λ = 1.3
9.0
8.8
10.7
10.5
10 GB
≤ 1.2
– min. output λ
CO
mg/kWh
≤
100
≤
100
≤
100
≤
100
≤ 1.3
NO
x
mg/kWh
≤
170
≤
170
≤
230
≤
230