Riello BS2/M Montage Und Bedienungs Anleitung Seite 17

Example 917M with LPG G31.
Maximum output operation
Gas pressure at test point M3
Pressure in combustion chamber
9.8 - 2
A pressure of 9.4 mbar (column 1) corresponds in the table to an
output of 156 kW.
This value serves as a rough guide, the effective delivery must be
measured at the gas meter.
To calculate the required gas pressure at test point M3, set the
maximum output required from the burner operation:
 find the nearest output value in the table for the burner in
question.
 Read off the pressure at test point M3 on the right in column
1.
 Add this value to the estimated pressure in the combustion
chamber.
Example 917M with LPG G31.
Required burner maximum output operation: 156 kW
Pressure of the gas at an output of 156 kW,
column 1
Pressure in combustion chamber
9.4 + 2
pressure required at test point M3.
GAS FEEDING LINE
Legend (Fig. 5)
1 Gas supply pipe
2 Manual cock (charged to the installer)
3 Gas pressure gauge (charged to the installer)
4 Filter
5 Gas pressure switch
6 Electromagnetic safety valve
7 Electromagnetic operating valve
8 Pressure governor
PF Pressure in combustion chamber
PL Air pressure at combustion head
M1 Gas-supply pressure test point
M2 Pressure point for gas measurement at gas train outlet
M3 Pressure point for gas pressure measurement at combustion
head
1
= 9.8 mbar
= 2 mbar
= 9.4 mbar
= 9.4 mbar
= 2 mbar
= 9.8 mbar
2 3 M1 4 5
3
\
kW
49
54
58
63
68
72
77
82
86
91
79
92
105
118
131
143
156
169
182
195
6 7 8 M2
P
F
P
L
D4430
GB
G31
p (mbar)
3.9
4.5
5
5.8
6.6
7.3
8.2
9.1
9.9
10.9
3.3
4.3
5.3
6.3
7.3
8.3
9.4
10.5
11.6
12.8
Tab. A
M3
Fig. 5
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