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5.8.2
Gas train
Type-approved in accordance with EN 676 and supplied sepa-
rately from the burner.
5.8.3
Gas train installation
Disconnect the electrical power supply using the
system main switch.
DANGER
Check that there are no gas leaks.
Pay attention when handling the train: danger of
crushing of limbs.
Make sure that the gas train is properly installed
by checking for any fuel leaks.
The operator must use the required equipment
during installation.
The train can enter the burner from the right or left side, depend-
ing on which is the most convenient, see Fig. 6.
20148758
Installation
5.8.4
Gas pressure
Tab. H indicates the pressure drops of the combustion head and
gas butterfly valve, on the basis of the burner operating output.
Model
1150
1300
1450
1600
1750
1900
2050
2200
1800
2000
2200
2400
2600
2800
3000
3200
3400
3500
2500
2800
3100
3400
3700
4000
4300
4600
4900
Data of head thermal power and gas pressure
refer to operation with gas butterfly valve fully
open (90°).
WARNING
The values shown in Tab. H refer to:
-
Natural gas G 20 NCV 10 kWh/Sm
-
Natural gas G 25 NCV 8.6 kWh/Sm
Column 1
Combustion head pressure drop.
Gas pressure measured at test point 12)(Fig. 6 on page 12), with:
-
combustion chamber at 0 mbar;
-
Gas G20 (natural gas)
To calculate the approximate output at which the burner oper-
ates:
-
subtract the combustion chamber pressure from the gas
pressure measured at test point 12) (Fig. 6 on page 12).
-
Find in Tab. H related to the burner concerned, the pressure
value closest to the result of the subtraction.
-
Read the corresponding output on the left.
Example GAS 9 P/M with natural gas G20:
Gas pressure at test point
Pressure in combustion chamber
corresponding to a maximum output of 2900 kW in the diagram
of GAS 9 P/M.
22
GB
1 p (mbar)
kW
G20
0.59
0.75
0.93
1.14
1.36
1.60
1.86
2.15
1.41
1.74
2.11
2.51
2.94
3.42
3.92
4.46
5.04
5.33
1.08
1.35
1.65
1.99
2.35
2.75
3.18
3.64
4.13
3
(8.6 Mcal/Sm
3
(7.4 Mcal/Sm
13 - 3
G25
0.87
1.11
1.38
1.69
2.01
2.37
2.75
3.18
2.09
2.58
3.12
3.71
4.35
5.06
5.80
6.60
7.46
7.89
1.60
2.00
2.44
2.95
3.48
4.07
4.71
5.39
6.11
Tab. H
3
)
3
)
=
13 mbar
=
3 mbar
=
10 mbar
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