5.11.2 Gas Train; 5.11.3 Gas Train Installation; 5.11.4 Gas Pressure - Riello RS 1000/EV BLU Installation, Use And Maintenance Instructions

5.11.2 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.

5.11.3 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 is prearranged to be connected to the burner by the
flange 1)(Fig. 25).
20119769
20123781
Installation
1
Fig. 25

5.11.4 Gas pressure

Tab. J indicates the pressure drops of the combustion head and
gas butterfly valve, on the basis of the burner operating output.
kW
4000
4500
5000
5500
6000
6500
7000
7500
8000
8500
9000
9500
10000
10100
5500
6000
6500
7000
7500
8000
8500
9000
9500
10000
10500
11000
11100
The values shown in Tab. J refer to:
- Natural gas G 20 NCV 9.45 kWh/Sm
- Natural gas G 25 NCV 8.13 kWh/Sm
Column 1
Combustion head pressure drop.
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 on page 20.
Column 2
Pressure loss at gas butterfly valve 2)(Fig. 26) with maximum
opening: 90°.
To calculate the approximate output at which the burner oper-
ates:
- subtract the pressure in combustion chamber from the gas
pressure measured at test point 1)(Fig. 26).
- Find, inTab. J related to the burner concerned, the pressure
value closest to the result of the subtraction.
- Read off the corresponding output on the left.
22 GB
1 p (mbar) 2 p (mbar)
G 20 G 25 G 20
9.9 14.4 1.2
13.0 18.8 1.5
16.0 23.2 1.8
19.1 27.6 2.2
22.1 32.0 2.6
25.2 36.3 3.1
28.9 41.6 3.6
32.9 47.2 4.1
36.9 52.7 4.7
41.5 59.4 5.3
46.4 66.3 5.9
51.2 73.3 6.6
56.0 80.2 7.3
57.0 81.6 7.5
18.2 26.6 2.2
22.1 32.1 2.6
26.0 37.6 3.1
29.9 43.2 3.6
33.8 48.7 4.1
38.6 55.4 4.7
43.4 62.1 5.3
48.2 68.8 6.0
53.1 75.5 6.6
58.6 83.1 7.4
64.4 91.0 8.1
70.2 99.0 8.9
71.4 100.6 9.1
3
(8.2 Mcal/Sm
3
(7.0 Mcal/Sm
G 25
1.7
2.2
2.7
3.3
3.9
4.6
5.3
6.1
7.0
7.9
8.8
9.8
10.9
11.1
3.3
3.9
4.6
5.3
6.1
7.0
7.9
8.8
9.8
10.9
12.0
13.2
13.4
Tab. J
3
)
3
)