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5.9.2
Gas train
Type-approved in accordance with EN 676 and supplied
separately from the burner.
To select the correct gas train model, refer to the manual "Burner-
gas train combination" supplied with the unit.
5.9.3
Gas train installation
Disconnect the electrical power using the 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 gas train must be connected to the gas connection 1)
(Fig. 21), using the flange 2), the gasket 3) and the screws 4)
supplied with the burner.
The train can enter the burner from the right or left side,
depending on which is the most convenient, see Fig. 21.
20159324
Installation
5.9.4
Tab. F indicates the pressure drops of the combustion head and
gas butterfly valve, on the basis of the burner operating output.
ATTENTION
The values shown in Tab. F refer to:
–
Natural gas G 20 NCV 9.45 kWh/Sm
–
Natural gas G 25 NCV 8.13 kWh/Sm
D3839
Fig. 21
20
GB
Gas pressure
1 p (mbar)
kW
G 20
G 25
70
0.5
0.6
100
1.0
1.4
130
1.9
2.8
160
3.0
4.4
190
4.3
6.5
220
6.0
9.0
250
7.9
11.8
280
10.1
15.1
310
12.6
18.8
340
15.3
22.9
80
3.0
4.4
120
4.4
6.6
160
5.9
8.8
200
7.5
11.1
240
9.0
13.3
280
10.5
15.7
320
12.1
17.9
360
13.6
20.3
400
15.1
22.6
440
16.7
25.0
Data of head thermal power and gas
pressure refer to operation with gas
butterfly valve fully open (90°).
2 p (mbar)
G 20
G 25
0.1
0.1
0.1
0.2
0.2
0.3
0.3
0.5
0.5
0.7
0.7
1.0
0.9
1.3
1.1
1.7
1.4
2.1
1.7
2.5
0.3
0.5
0.5
0.7
0.7
1.0
0.8
1.2
1.0
1.5
1.2
1.7
1.3
2.0
1.5
2.3
1.7
2.5
1.9
2.8
Tab. F
3
3
(8.2 Mcal/Sm
)
3
3
(7.0 Mcal/Sm
)
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