Gas Supply Pressure - Riello C9324400 Installation, Use And Maintenance Instructions

4.10 Gas supply pressure

The diagram (Fig. 22) show minimum load losses at combustion
head depending on the maximum burner output operation with nat-
ural gas (G 20).
Gas pressure is measured at the test point 1)(Fig. 21), with:
• Combustion chamber at 0 mbar
• Burner working at maximum output
• Ring nut 2) (Fig. 15) adjusted as in the diagram of Fig. 14
NOTE
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. 21);
– find, in the diagram (Fig. 22) the pressure value closest to the
result you want;
– read the corresponding output on the left.
Example for RS 100/E
• Maximum output operation
• Ring nut 2)(Fig. 15) adjusted as in the diagram of Fig. 14
• Gas pressure at test point 1)(Fig. 21)
• Pressure in combustion chamber
3.15 - 1.18
A maximum output of 2815 MBtu/hr corresponds to 1.97 "wc pres-
sure.
This value serves as a rough guide; the effective output must be
measured at the gas meter.
NOTE
To know the required gas pressure at test point 1) (Fig. 21), 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 diagram (Fig. 22), the pressure test point 1)
(Fig. 21);
– add this value to the estimated pressure in the combustion
chamber.
Example for RS 100/E
• Maximum output required: 2815 MBtu/hr
• Ring nut 2) (Fig. 15) adjusted as in the diagram of Fig. 14
• Gas pressure at output of 2815 MBtu/hr
• Pressure in combustion chamber
1.97 + 1.18
pressure required at pressure test point 1)(Fig. 21).
D2441
Installation
= 3.15 "wc
= 1.18 "wc
= 1.97 "wc
= 1.97 "wc
= 1.18 "wc
= 3.15 "wc
p "wc gas butterfly 2)(Fig. 21)
1
MBtu/hr
1586
1757
1928
2098
2
2269
2440
2610
2777
2951
Fig. 21
23
RS 70/E
Burner output operation
RS 100/E
Burner output operation
RS 130/E
Burner output operation
RS 70/E RS 100/E
p "WC MBtu/hr
kW kW
465 0.1 2644 775
515 0.1 2878 843
565 0.1 3125 916
615 0.1 3371 988
665 0.1 3616 1060
715 0.2 3863 1132
765 0.2 4109 1205
814 0.2 4405 1291
865 0.2
D3123
Fig. 22
RS 130/E
p "WC MBtu/hr p "WC
kW
0.3 3521 1032 0.6
0.4 3825 1121 0.7
0.4 4129 1210 0.9
0.5 4432 1299 1.0
0.5 4736 1388 1.1
0.7 5036 1476 1.3
0.7 5340 1565 1.4
0.9 5545 1625 1.6
Tab. J
20028248