5.11.2 Gas Train; Gas Train Installation; 5.11.4 Gas Pressure - Riello RS 1300/EV BLU Installation, Use And Maintenance Instructions

5.11.2 Gas train

Approved according to standard EN 676 and provided separately
from the burner.

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. 22).
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Installation

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.
The values shown in Tab. J refer to:
–
–
1
Column 1
Fig. 22
Combustion head pressure drop.
Gas pressure measured at test point 1)(Fig. 23), with:
•
•
•
Column 2
Pressure loss at gas butterfly valve 2)(Fig. 23) with maximum
opening: 90°.
To calculate the approximate output at which the burner oper-
ates:
–
–
–
22 GB
Natural gas G 20 NCV 9.45 kWh/Sm
Natural gas G 25 NCV 8.13 kWh/Sm
1 p (mbar)
kW
G 20
9500 60
10000 63
10500 69
11100 76
11600 84
12200 92
12700 101
13200 109
13700 116
14300 122
9503 23
10200 27
10900 31
11600 35
12400 41
13100 46
13800 51
14500 56
15200 62
15560 66
15200 58
15700 62
16300 67
16800 71
17400 76
17900 81
18500 87
19000 92
19600 98
20100 104
combustion chamber at 0 mbar;
burner working at maximum modulating output;
combustion head set as on page 21.
subtract the pressure in combustion chamber from the gas
pressure measured at test point 1) (Fig. 23).
Find, in 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.
3 3
(8.2 Mcal/Sm )
3 3
(7.0 Mcal/Sm )
2 p (mbar)
G 25 G 20 G 25
89 17 25
94 19 28
103 21 31
113 23 34
125 25 37
137 27 40
150 29 43
162 31 46
173 33 49
182 36 54
34 13 19
40 14 21
46 15 22
52 16 24
61 17 25
69 18 27
76 20 30
83 22 33
92 24 36
98 26 39
86 11 16
92 13 19
100 16 24
106 19 28
113 21 31
121 24 36
130 27 40
137 30 45
146 33 49
155 36 54
Tab. J