Riello 1311 T2, Регулируемая работа, Страница: 27 / 60

25
20040170
GB
Installation
5.13.2 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.
5.13.3 Gas train installation
The gas train is prearranged to be connected to the burner by the
flange 1) (Fig. 25).
5.13.4 Gas pressure
The Tab. I indicates the pressure drop of the combustion head
and the gas butterfly valve depending on the operating output of
the burner.
Tab. I
The values shown in Tab. I refer to:
–
Natural gas G 20 NCV 9.45 kWh/Sm
3
(8.2 Mcal/Sm
3
)
– Natural gas G 25 NCV 8.13 kWh/Sm
3
(7.0 Mcal/Sm
3
)
Column 1
Pressure loss at combustion head.
Gas pressure measured at test point 1)(Fig. 26), with:
•
combustion chamber at 0 mbar;
• burner working at maximum modulating output;
• combustion head set as in pag. 20.
Column 2
Pressure loss at gas butterfly valve 2)(Fig. 26) with maximum
opening: 90°.
Calculate the approximate output of the burner thus:
–
subtract the combustion chamber pressure from the gas
pressure measured at test point 1) (Fig. 26).
– Find, in the table Tab. I related to the burner concerned, the
pressure value closest to the result of the subtraction.
– Read off the corresponding output on the left.
DANGER
Disconnect the electrical power using the main
system switch.
Check that there are no gas leaks.
Beware of train movements: danger of crushing of
limbs.
Make sure that the gas train is properly installed
by checking for any fuel leaks.
The operator must use appropriate tools for instal-
lation.
1
Fig. 25
D11545
kW
1 
p (mbar)
2 
p (mbar)
G 20 G 25 G 20 G 25
R
LS
1000
/EV
C13
3750 9.2 13.7 1.0 1.4
4000 10.8 16.0 1.1 1.6
4500 13.9 20.7 1.4 2.1
5000 17.0 25.4 1.7 2.5
5500 20.2 30.1 2.1 3.1
6000 23.3 34.8 2.4 3.7
6500 26.4 39.4 2.9 4.3
7000 30.4 45.3 3.3 5.0
7500 34.8 51.9 3.8 5.7
8000 39.2 58.5 4.4 6.5
8500 43.6 65.1 4.9 7.3
9000 49.2 73.3 5.5 8.2
9500 55.0 82.0 6.1 9.2
10000 60.8 90.7 6.8 10.1
10600 67.8 101.1 7.6 11.4
RLS
120
0/EV
C1
3
5500 23.1 34.5 2.1 3.1
6000 27.9 41.6 2.4 3.7
6500 32.6 48.7 2.9 4.3
7000 37.4 55.7 3.3 5.0
7500 42.1 62.8 3.8 5.7
8000 48.3 72.1 4.4 6.5
8500 54.5 81.3 4.9 7.3
9000 60.7 90.6 5.5 8.2
9500 67.0 99.8 6.1 9.2
10000 74.3 110.8 6.8 10.2
10500 81.9 122.2 7.5 11.2
11000 89.6 133.6 8.2 12.3
11500 97.2 145.0 9.0 13.4