Riello FS20D 591M Installation, Use And Maintenance Instructions page 50

3.5 FIXING THE ELECTRICAL WIRING
All the electrical wires, which are to be connected to the terminal board (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 board must be
gripped in the cable clamps (3, fig. 1). This is molded on both sides to allow the use of various diameter cables.
A
B
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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
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
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 155 kW boiler with an effi-
ciency of 90%, the burner input is about 172 kW using
the diagram below, the combustion set point is 3.
kcal/h
200,000
180,000
160,000
140,000
120,000
100,000
80,000
The diagram is to be used only for initial settings, to improve air pressure switch operation or improve combus-
tion, it may be necessary to reduce this setting (set point toward position 0).
2750
C
ø
A = 8
kW
240
220
200
180
172
160
140
120
100
80
0 1
Cable clamps
ø
B = 11
C
A
B
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2 3
6 GB
A B C
ø
C = 16
4 5 Set point
con-
2
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