PART I: INSTALLATION
10
To get the input in kcal/h, multiply value in kW by 860.
Data are referred to standard conditions: atmospheric pressure at 1013mbar, ambient temperature at 15°C.
NOTE:
The performance curve is a diagram that represents the burner performance in the type approval phase or in the laboratory
tests, but does not represent the regulation range of the machine. On this diagram the maximum output point is usually reached by
adjsuting the combustion head to its “MAX” position (see paragraph “Adjusting the combustion head”); the minimum output point is
reached setting the combustion head to its “MIN” position. During the first ignition, the combustion head is set in order to find a
compromise between the burner output and the generator specifications, that is why the minimum output may be different from the
Performance curve minimum
Pressure in the network/gas rate curves
BACK PRE
SSURE
IN
COMBU
S
TION CHAMBER mb
ar
NGX550 Low NOx burner
kW
Natural gas burners
GAS PRESSURE mbar
NG550 Single stage
Gas rate Stm
3
/h
NG550 Double-stage/Progressive
Gas rate Stm
3
/h
L.P.G. Burners
GAS PRESSURE mbar
LG550 L-TN..25 Single stage
Gas rate Stm
3
/h
LG550 L-TN..32/40/50 Single stage
Gas rate Stm
3
/h
0
1
2
3
4
5
6
7
8
9
100
200
300
400
500
0
10
20
30
40
50
60
70
20
30
40
50
60
70
R p 1"¼ (32)
R p 1"½ (40)
R p 2" ( 50)
R p 1" (25)
0
10
20
30
40
50
60
70
15
25
35
45
55
65
75
Rp 1"¼
Rp 1"½ (40)
Rp 2" (50)
Rp 1"
10
30
50
70
90
110
8
10
12
14
16
18
20
22
24
26
Rp 1" (25)
2
6
10
14
18
22
26
30
8
10
12
14
16
18
20
22
24
26
Rp 1"¼ (32)
Rp 1"½ (40)
Rp 2" (50)