PART I: SPECIFICATIONS
10
How to read the burner “Performance curve”
To check if the burner is suitable for the boiler to which it must be instal-
lled, the following parameters are needed:
furnace input, in kW or kcal/h (kW = kcal/h/860);
backpressure (data are available on the boiler ID plate or in the
user’s manual).
Example:
Furnace input: 600kW
Backpressure: 4 mbar
In the “Performance curve” diagram, draw a vertical line matching the
furnace input value and an horizontal line matching the backpressure
value. The burner is suitable if the intersection point A is inside the per-
formance curve.
Data are referred to standard conditions: atmospheric pressure at 1013
mbar, ambient temperature at 15° C.
Checking the proper gas train size
Performance Curves
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
To check the proper gas train size, it is necessary to the available
gas pressure value upstream the burner’s gas valve. Then subtract
the backpressure. The result is called
pgas.
Draw a vertical line
matching the furnace input value (600kW, in the example), quoted
on the x-axis, as far as intercepitng the network pressure curve,
according to the installed gas train (DN65, in the example). From the
interception point, draw an horizontal line as far as matching, on the
y-axis, the value of pressure necessary to get the requested furnace
input. This value must be lower or equal to the
pgas
value, calcula-
ted before.
BACK
PRESSURE
IN
COMBUSTION
CHAMBER
mba
r
E115X
kW
E150X MG
kW
BACK
PRESS
URE
IN
COMBUSTION
CHAMBER
mbar
E180X MG
kW
Campo di lavoro bruciatori
Tipo P60 Mod. M-xx.x.IT.A.0.50 - M-.xx.x.IT.A.0.65
-1
0
1
2
3
4
5
6
7
8
100
200
300
400
500
600
700
800
900
Potenza kW
Contropressione
in
camera
di
combustione
mbar
A
backpre
ssur
e
in
combust
ion
chamb
er
(mbar)
Power kW
0
5
10
15
20
25
100
200
300
400
500
600
700
800
900
Potenza / Output (kW)
Minima
pressione
gas
in
rete
/ Minimum
inlet
gas
pressure
(mbar)
Rp 2" (50)
DN65
Power kW
minimu
m
ga
s
pr
essur
e
in
the
ne
twork
mbar
DN65