3159
6
3.5 FIXING THE ELECTRICAL WIRING
All the electrical wires, which are to be connected to the terminal strip (7, fig. 1, page 1) should pass through the
cable grommet (4, fig. 1). All the electrical wires, which are to be connected into the terminal strip must be
gripped in the cable clamps (3, fig. 1). This is molded on both sides to allow the use of various diameter cables.
Cable clamps
A
C
B
A
C
B
A =
ø
8
B =
ø
11
C =
ø
16
D5052
4.
WORKING
4.1 COMBUSTION ADJUSTMENT
In conformity with Efficiency Directive 92/42/EEC the application of the burner on the boiler, adjustment and testing
must be carried out observing the instruction manual of the boiler, including verification of the CO and CO
2
con-
centration in the flue gases, their temperatures and the average temperature of the water in the boiler.
To suit the required appliance output, choose the proper setting of the combustion head, and the air damper
opening.
4.2 COMBUSTION HEAD SETTING
S7015
C
A
B
0
1
3
2
120
90
80
70
60
50
100
80,000
70,000
60,000
50,000
40,000
kcal/h
kW
D5258
4
5
40
110
90,000
100,000
Set point
Loose 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).
Example:
The burner is installed on a 81 kW
boiler with an efficiency of 90%, the burner input
is about 90 kW using the diagram, the combus-
tion set point is
3
.
The diagram is to be used only for initial settings,
to improve air pressure switch operation or
improve combustion, it may be necessary to
reduce this setting
(set point toward position
0
).
