Riello RS 100/E MZ, Installation, Use And Maintenance Instructions

Page: 52 / 56

52
GB
Appendix - Gas supply pressure
C
The adjacent tables show minimum load losses along the gas sup-
ply line depending on the maximum burner output operation.
Column 1
Load loss at combustion head.
Gas pressure measured at the test point 1)(Fig. 40), with:
• Combustion chamber at 0 mbar;
• Burner working at maximum output;
• Combustion head adjusted according to the diagram of Fig. 17.
Column 2
Load loss at gas butterfly valve 2)(Fig. 40) with maximum opening:
90°.
Column 3
Load loss at train 3)(Fig. 40) including: adjustment valve VR,
safety valve VS (both fully open), pressure adjuster R, filter F.
The values shown in the tables refer to:
natural gas G 20 PCI 9.45 kWh/Sm
3
(8.2 Mcal/Sm
3
)
With:
natural gas G 25 PCI 8.13 kWh/Sm
3
(7.0 Mcal/Sm
3
) multiply the values of the tables:
- columns 1-2: by 1.5;
- column 3: by 1.35.
To know the approximate output at which the burner is operating
at its maximum:
- Subtract the combustion chamber pressure from the gas pres-
sure measured at test point 1)(Fig. 40).
- Find, in the table relating to the burner concerned, column 1, the
pressure value closest to the result you want.
- Read the corresponding output on the left.
Example - RS 190/E:
• Maximum output operation
• Natural gas G 20 PCI 9.45 kWh/Sm
3
• Combustion head adjusted according to the diagram of Fig. 17.
• Gas pressure at test point 1)(Fig. 40)
= 14.5 mbar
• Pressure in combustion chamber = 3.0 mbar
14.5 - 3.0 = 11.5 mbar
A maximum output of 2000 kW shown in Table RS 190/E corre-
sponds to 11.5 mbar pressure, column 1.
This value serves as a rough guide; the effective output must be
measured at the gas meter.
To know the required gas pressure at test point 1)(Fig. 40), set the
maximum output required from the burner operation, then:
- Find the nearest output value in the table for the burner in ques-
tion.
- Read, on the right (column 1) the socket pressure 1)(Fig. 40).
- Add this value to the estimated pressure in the combustion
chamber.
Example - RS 190/E:
• Maximum output required: 2000 kW
• Natural gas G 20 PCI 9.45 kWh/Sm
3
• Combustion head adjusted according to the diagram of Fig. 17.
• Gas pressure at output of 2000 kW, taken from table RS 190/E,
column 1 = 11.5 mbar
• Pressure in combustion chamber = 3.0 mbar
11.5 + 3.0 = 14.5 mbar
pressure required at test point 1)(Fig. 40).
RS 70/E MZ
∆
p (mbar)
RS 100/E MZ
∆
p (mbar)
RS 130/E MZ
∆
p (mbar)
RS 190/E
∆
p (mbar)
RS 250/E MZ
∆
p (mbar)
kW 1 2
3
Ø 1”1/4
3970256
Ø 1”1/2
3970250
Ø 2”
3970252
Ø 2”
3970221
DN 65
3970222
465
500
19.9 10.1 7.0 4.2 3.6
550 23.2 11.6 8.2 4.4 3.7
600 26.7 13.2 9.5 4.6 3.9
650 30.3 14.7 10.8 4.9 4.1
700 34.0 16.4 12.1 5.1 4.2
750 37.7 18.0 13.4 5.4 4.4
800 41.5 19.9 14.8 5.8 4.6
814
kW 1 2
3
Ø 1”1/4
3970256
Ø 1”1/2
3970250
Ø 2”
3970252
Ø 2”
3970221
DN 65
3970222
695
700
34.0 16.4 12.1 5.1 4.2
750 37.7 18.0 13.4 5.4 4.4
800 41.5 19.9 14.8 5.8 4.6
850
900
1000 27.7 20.6 8.9 5.5
1100
1163
kW 1 2
3
Ø 1”1/2
3970250
Ø 2”
3970252
Ø 2”
3970221
DN 65
3970222
DN 80
3970223
930 25.0 18.6 8.2 5.2 3.9
1000 27.7 20.6 8.9 5.5 4.0
1100 31.9 23.9 10.2 6.1 4.3
1200 36.1 27.2 11.6 6.7 4.6
1300 40.5 30.9 13.1 7.3 4.9
1400 45.9 35.2 15.0 8.1 5.2
1500 51.2 39.6 17.0 8.9 5.5
1512
kW 1 2
3
Ø 1”1/2
3970250
Ø 2”
3970252
Ø 2”
3970221
DN 65
3970222
DN 80
3970223
1280 9.6 1.3 39.5 30.0 12.7 7.1 4.8
1400 9.7 1.6 45.9 35.2 15.0 8.1 5.2
1600 9.8 2.1 56.5 43.9 19.0 9.8 5.8
1800 9.9 2.7 67.2 52.7 23.1 11.5 6.5
2000 11.5 3.3 - 62.2 27.5 13.5 7.3
2100 12.6 3.6 - 67.6 30.0 14.6 7.7
2290 14.9 4.3 - 77.8 34.8 16.9 8.6
kW 1 2
3
Ø 1”1/2
3970250
Ø 2”
3970252
Ø 2”
3970221
DN 65
3970222
DN 80
3970223
1250 5.2 1.3 38.2 28.9 12.3 6.9 4.7
1500 7.2 1.8 51.2 39.6 17.0 8.9 5.5
1750 9.3 2.5 64.5 50.5 22.0 11.1 6.3
2000 11.3 3.3 - 62.2 27.5 13.5 7.3
2250 14.1 4.2 - 75.7 33.8 16.4 8.5
2500 17.0 5.1 - - 40.2 19.3 9.7
2650 19.4 5.8 - - 45.0 21.2 10.5
in progr
es
s
in progr
es
s
in progress
D3734
Fig. 40