Combustion Head Adjustment; Air Damper Adjustment - Riello 40 Serie Instrucciones Para La Instalación, Uso Y Mantenimiento

COMBUSTION HEAD ADJUSTMENT

Loosen the screw (A), move the elbow (B) so that the
rear plate of the coupling (C) coincides with the set
point.
Tighten the screw (A).
ATTENTION
To disassemble the diffuser disc holding head, proceed
as follows:
– Loosen the two screws (A) without removing them.
– Pull back the head, rotating it by about 180°.
– Extract the head, tilting it downwards.
Example:
The burner is installed in a 21 kW
boiler.
Considering an efficiency of 90%,
the burner must supply around
23kW.
The diagram shows that for this
output the adjustment must be
made on notch 1.
The diagram is to be used only for
initial settings, to improve air pres-
sure switch operation or improve
combustion, it may be necessary
to reduce this setting (set point
toward position 0).

AIR DAMPER ADJUSTMENT

The air damper opening motor (1) controls the damper
(6); the burner does not start until the damper (6) is com-
pletely open.
To adjust the fixed damper (4) it is necessary to:
 loosen the screws (3 and 5) and rotate the damper as
far as the required point (2).
 Once optimum adjustment has been reached, fix the
screws (3 and 5).
The adjustment of the damper varies in each single appli-
cation, so it is necessary to use a calibration tool to obtain
an efficient combustion result.
Important:
It is advisable to carry out an analysis of the combustion
values with the hood assembled.
3302
kcal/h kW
40
35
30,000
30
25,000
25
20,000
23
20
15,000
15
10,000
10
0
6
GB
C
A B
1
0.5
2
3
D7305
S7020
A
D5051
1.5 2
Set point
1
5
6
4