2701
8
GB
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
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 nozzle and adjust the pump pressure, the setting of
the combustion head, and the air damper opening in accordance with the following schedule.
They refer to 12.5% CO
2
at sea level and with light oil and room temperature of 20 °C.
CRONO 10-L2
Nozzle
Pump pressure
Burner output
Comb. head
adjustment
Air damper
adjustment
bar
kg/h ± 4%
Set-point
GPH
Angle
1st stage
2nd stage
1st stage
2nd stage
Set-point
1st stage
2nd stage
1.00
60°
9
14
3.5
4.3
0
0.2
1.5
1.10
60°
9
14
3.8
4.8
1
0.4
2.1
1.25
60°
9
14
4.3
5.4
2
0.6
2.6
1.50
60°
9
14
5.2
6.5
3
0.8
3.4
1.75
60°
9
14
6.1
7.6
4
1.2
4.8
2.00
60°
9
14
7.0
8.7
5
1.4
5.4
2.25
60°
9
14
7.8
9.8
6
1.6
6.0
CRONO 15-L2
Nozzle
Pump pressure
Burner output
Comb. head
adjustment
Air damper
adjustment
bar
kg/h ± 4%
Set-point
GPH
Angle
1st stage
2nd stage
1st stage
2nd stage
Set-point
1st stage
2nd stage
1.50
60°
9
14
5.2
6.5
0
0.2
0.5
1.75
60°
9
14
6.1
7.6
0.5
0.25
1.0
2.00
60°
9
14
7.0
8.7
1.5
0.4
1.1
2.25
60°
9
14
7.8
9.8
2.5
0.5
1.5
2.50
60°
9
14
8.7
10.8
3.5
0.6
2.0
3.00
60°
9
14
10.4
13.0
5.0
0.8
3.0
3.50
60°
9
14
12.2
15.2
6.0
1.0
3.9
CRONO 20-L2
Nozzle
Pump pressure
Burner output
Comb. head
adjustment
Air damper
adjustment
bar
kg/h ± 4%
Set-point
GPH
Angle
1st stage
2nd stage
1st stage
2nd stage
Set-point
1st stage
2nd stage
2.50
60°
9
14
8.7
10.8
0
0.2
1.8
3.00
60°
9
14
10.4
13.0
1
0.5
2.7
3.50
60°
9
14
12.2
15.2
2.5
0.8
3.7
4.00
60°
9
14
13.9
17.3
4
1.0
4.5
4.50
60°
9
14
15.6
19.5
6
1.3
6.0
CRONO 25-L2
Nozzle
Pump
pressure
Burner output
Comb. head
adjustment
Air damper
adjustment
GPH
Angle
kg/h ± 4%
Set-point
1st stage 2nd stage
bar
1st stage 2nd stage
Set-point
1st stage 2nd stage
2.00
1.00
60°
12
8.0
12.4
0
0.25
2.1
2.00
2.00
60°
12
8.0
16.4
3
0.15
3.0
2.50
2.50
60°
12
10.3
20.5
6
0.3
4.4
3.00
3.00
60°
12.5
12.6
25.0
8
0.6
6.0