3095
8
GB
4.
WORKING
FIRING OUTPUT
The firing must occur at reducer output and not
higher than 120 kW.
In order to measure the firing output:
– Disconnect the connector (
CN1
) on the ioniza-
tion probe cable
(see electrical wiring at page 7)
;
the burner will fire and then go into lock-out after
the safety time (3s) has elapsed.
– Perform 10 firings with consecutive lock-outs.
– On the meter read the total quantity of gas
burned. This quantity must be equal to or lower
than the quantity here given:
0.10 Nm
3
for G20 (natural gas H)
0.10 Nm
3
for G25 (natural gas L)
0.03 Nm
3
for G31 (LPG).
4.1
COMBUSTION ADJUSTMENT,
(see fig. 8)
In conformity with Efficiency Directive 92/42/EEC
the application of the burner on the boiler, adjust-
ment and testing must be carried out observing the
instruction manual of the boiler, including verification
of the CO and CO
2
concentration 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.
The burner leaves the factory set for the mini-
mum output.
4.2
COMBUSTION HEAD SETTING
It depends on the output of the burner and is car-
ried out by rotating clockwise or counterclock-
wise the setting screw (6) until the set-point
marked on the regulating rod (2) is level with the
outside plane of the head assembly (1).
In the sketch of fig. 8 the combustion head is set
for an output of 230 kW.
The set point
4
marked of the regulating rod is at
the same level with the outside plane of the head-
assembly as indicated in the diagram.
Example:
The burner is installed in a 210 kW boiler.
The burner will have to deliver about 230 kW,
considering an efficiency of 90%.
The diagram indicates, that for this efficiency the
adjustment has to be effected on the set-point 4.
NOTE
The diagram is orientative; to assure a good
working of the burner, we suggest to adjust the
combustion head according to the boiler.
210,000
150,000
290,000
190,000
170,000
130,000
kcal/h
kW
0
8
2
4
6
Set point
150
190
210
250
270
290
310
330
170
230
350
10
D6235
SW1004
Fig. 8
230,000
250,000
270,000
