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4.9.2
Gas train
Approved according to standard EN 676 and provided separately
from the burner.
To select the correct gas train model, refer to the supplied "Burn-
er-gas train combination" manual.
4.9.3
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, depend-
ing on which is the most convenient, see Fig. 21.
Installation
D722
Fig. 21
19
GB
4.9.4
Gas pressure
Tab. G indicates the pressure drops of the combustion head and
gas butterfly valve, on the basis of the burner operating output.
kW
350
400
450
500
550
600
650
700
750
800
860
600
650
715
760
825
890
955
1020
1090
1170
1250
1300
The heat output and gas pressure data in
the head refer to operation with gas but-
terfly valve fully open (90°).
WARNING
The values shown in Tab. G refer to:
–
Natural gas G 20 NCV 10 kWh/Sm
–
Natural gas G 25 NCV 8.6 kWh/Sm
1 p (mbar)
G20
G25
2.1
3.1
3.1
4.7
4.1
6.2
5.2
7.8
6.1
9.2
7.1
10.7
8.0
12.0
9.0
13.5
10.1
15.2
11.1
16.7
12.2
18.3
4.7
7.0
6.3
9.5
8.0
12.0
9.6
14.4
11.3
16.7
12.9
19.4
14.6
21.9
16.2
24.3
18.0
27
19.5
29.2
20.5
30.8
23.7
35.6
Tab. G
3
3
(8.6 Mcal/Sm
)
3
3
(7.4 Mcal/Sm
)
20151835
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