Riello RS 120/E LN, Инструкции по установке, использованию и обслуживанию

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Installation
23
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4.10 Gas supply pressure
The diagram (Fig. 23) 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. 22), with:
•
Combustion chamber at 0 mbar
• Burner working at maximum output
• Ring nut 2) (Fig. 17) adjusted as in the diagram of Fig. 16
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. 22);
– find, in the diagram (Fig. 23) the pressure value closest to the
result you want;
– read the corresponding output on the left.
Example for RS 120/E LN
• Maximum output operation
• Natural gas
• Gas ring 2)(Fig. 16, page 20) adjust as indicated in diagram
Fig. 16, page 20
• Gas pressure at test point 1)(Fig. 22) = 5.11 “WC
• Pressure in combustion chamber = 1.18 “WC
5.11 - 1.18 = 3.93 “WC
A maximum output of 3030 MBtu/hr shown diagrams RS 120/E LN
corresponds to 3.93 “WC pressure.
This value serves as a rough guide, the effective delivery must be
measured at the gas meter.
NOTE
To know the required gas pressure at test point 1) (Fig. 22), 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. 23), the pressure test point 1)
(Fig. 22);
– add this value to the estimated pressure in the combustion
chamber.
Example for RS 120/E LN
• Maximum output required: 3750 MBtu/hr
• Ring nut 2) (Fig. 17) adjusted as in the diagram of Fig. 16
• Gas pressure at output of 2815 MBtu/hr = 6 “WC
• Pressure in combustion chamber = 1.18 “WC
6 + 1.18 = 7.15 “WC
pressure required at pressure test point 1) (Fig. 22).

p “wc gas butterfly 2)(Fig. 22)
Fig. 22
1
2
D2441
RS 68/E LN RS 120/E LN
MBtu/hr kW

p “WC MBtu/hr kW

p “WC
1194 350 0.04 2047 600 0.1
1365 400 0.04 2218 650 0.1
1535 450 0.04 2440 715 0.2
1706 500 0.1 2593 760 0.2
1877 550 0.1 2815 825 0.2
2047 600 0.1 3037 890 0.2
2218 650 0.1 3258 955 0.2
2388 700 0.1 3480 1020 0.3
2559 750 0.2 3719 1090 0.3
2730 800 0.2 3992 1170 0.3
2934 860 0.2 4265 1250 0.4
3071 900 0.2 4335 1300 0.5
3241 950 0.2 4606 1350 0.5
4777 1400 0.5
Fig. 23
Burner output operation
D3182

p (“WC)

p (“WC)
RS 6
8
/E
L
N
RS 12
0/E L
N
Burner output operation