Riello RS 1000/M C01, Installation, Use And Maintenance Instructions

Page: 22 / 52

20061862
20 GB
Installation
5.11.2 Gas train
Type-approved in accordance with EN 676 and supplied sepa-
rately from the burner.
To select the correct model of the gas train, refer to the "burner-
gas train combination" manual supplied.
5.11.3 Gas train installation
The gas train is prearranged to be connected to the burner with
the flange 1)(Fig. 20).
5.11.4 Gas pressure
Tab. K indicates the pressure drop of the combustion head and
the gas butterfly valve depending on the operating output of the
burner.
Tab. K
The values shown in Tab. K 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 drop on combustion head.
Gas pressure measured at the test point 1) (Fig. 21), with:
•
combustion chamber at 0 mbar;
• burner working at maximum modulating output;
• combustion head adjusted as in page 18.
Column 2
Pressure loss at gas butterfly valve 2) (Fig. 21) with maximum
opening: 90°.
To calculate the approximate output at which the burner oper-
ates:
–
Subtract the combustion chamber pressure from the gas
pressure measured at test point 1) (Fig. 21).
– Find, in the table Tab. K 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 supply by means of the
system's main switch.
Make sure 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.
20062301
Fig. 20
kW
1
∆
p (mbar) 2
∆
p (mbar)
G 20 G 25 G 20 G 25
R
S
1
0
0
0
/M
C
0
1
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
R
S
1
2
0
0
/M
C
0
1
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