C.I.B. UNIGAS
- M039213CB
6
How to interpret the burner “Performance curve”
To check if the burner is suitable for the boiler to which it must be installled, the following parameters are needed:
furnace input, in kW or kcal/h (kW = kcal/h / 860);
backpressure (data are available on the boiler’s ID plate or in the user’s manual).
Example:
Furnace input: 600kW
Backpressure: 4mbar
In the “Performance curve” diagram (Fig. 2), 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 performance curve.
Fig. 2
Data are referred to standard conditions: atmospheric pressure at 1013mbar, ambient temperature at 15°C
Checking the proper gas train size
To check the proper gas train size, it is necessary to know the available gas pressure value upstream the burner’s gas valve. Then sub-
tract the backpressure. The result is called
p
gas.
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 fur-
nace input. This value must be lower or equal to the
p
gas
value, calculated before.
Fig. 3
Burner model identification
Burners are identified by burner type and model. Burner model identification is described as follows.
Type
HR512A
Model
MG. PR. S. *. A. 1. 80
(1) (2) (3) (4) (5) (6) (7) (8)
(1) BURNER TYPE
HR91A - HR92A - HR93A - HR512A - HR515A - HR520A - HR525A
(2) FUEL
M - Natural gas G - Light oil
(3) OPERATION
PR - Progressive MD - Fully modulating
(4) BLAST TUBE
S - Standard L - Extended
(5) DESTINATION COUNTRY
* - see data plate
(6) BURNER VERSION
A - Standard
(7) EQUIPMENT
1 = 2 gas proving system
8 = 2 gas proving maximum gas pressure switch
(8) GAS CONNECTION
50 = Rp2
65 = DN65 80 = DN80 100 = DN100
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
M ...50 (Multibloc DUNGS MB DLE 420 B01)
M-...65 (Filtro / Filter DN65+ SIEMENS VGD40.065 +SKP1x+SKP2x)
0
5
10
15
20
25
100
200
300
400
500
600
700
800
900
Potenza / Output (kW)
Min
im
a p
ressio
n
e g
as in
ret
e / Min
imu
m in
let
g
as
p
ressu
re (
m
b
ar)
Rp 2" (50)
DN65
Summary of Contents for HR93A
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