20145860
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. 21).
5.11.4 Gas pressure
Tab. J indicates the pressure drop of the combustion head and
the gas butterfly valve depending on the operating output of the
burner.
Tab. J
The values shown in Tab. J 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. 22), 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. 22) 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. 22).
–
Find, in the table Tab. J 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.
WARNING
The heat output and gas pressure data in the
head refer to operation with gas butterfly valve
fully open (90°).
Fig. 21
20058943
kW
1
p (mbar)
2
p (mbar)
G 20
G 25
G 20
G 25
RS 1
000
/M
BLU
4000
9.9
14.4
1.2
1.7
4500
13.0
18.8
1.5
2.2
5000
16.0
23.2
1.8
2.7
5500
19.1
27.6
2.2
3.3
6000
22.1
32.0
2.6
3.9
6500
25.2
36.3
3.1
4.6
7000
28.9
41.6
3.6
5.3
7500
32.9
47.2
4.1
6.1
8000
36.9
52.7
4.7
7.0
8500
41.5
59.4
5.3
7.9
9000
46.4
66.3
5.9
8.8
9500
51.2
73.3
6.6
9.8
10000
56.0
80.2
7.3
10.9
10100
57.0
81.6
7.5
11.1
RS 1
200
/M
BLU
5500
18.2
26.6
2.2
3.3
6000
22.1
32.1
2.6
3.9
6500
26.0
37.6
3.1
4.6
7000
29.9
43.2
3.6
5.3
7500
33.8
48.7
4.1
6.1
8000
38.6
55.4
4.7
7.0
8500
43.4
62.1
5.3
7.9
9000
48.2
68.8
6.0
8.8
9500
53.1
75.5
6.6
9.8
10000
58.6
83.1
7.4
10.9
10500
64.4
91.0
8.1
12.0
11000
70.2
99.0
8.9
13.2
11100
71.4
100.6
9.1
13.4
Summary of Contents for RS 1000/M BLU
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