20036644
34
GB
Installation
4.14.3 Gas pressure
The Tab. J shows minimum pressure losses along the gas supply
line depending on the maximum burner output operation.
The values shown in the Tab. J refer to natural gas (GCV).
Column 1
Pressure loss at combustion head.
Gas pressure measured at the test point 1)(Fig. 29), with:
–
combustion chamber at “WC;
–
burner working at maximum output;
–
combustion head adjusted as in the diagram of Fig. 21 on
page 28.
Column 2
Pressure loss at gas butterfly valve 2)(Fig. 29) with maximum
opening: 90°.
Calculate the approximate maximum output of the burner as fol-
lows:
–
subtract the combustion chamber pressure from the gas pres-
sure measured at test point 1)(Fig. 29);
–
find, in the Tab. J relating to the burner concerned, the pres-
sure value closest to the result of the subtraction;
–
read off the corresponding output on the left.
Example for RLS 500/E:
•
Maximum output operation
•
Gas pressure at test point 1)(Fig. 29)
=
11.7 “WC
•
Pressure in combustion chamber
=
2 “WC
11.7 - 2
=
9.7 “WC
An output of 15148 MBtu/hr shown in Tab. J corresponds to
9.7 “WC pressure, column 1.
This value serves as a rough guide, the effective delivery must be
measured at the gas meter.
Note
See the accompanying instructions for the adjustment of the gas
train.
Tab. J
1
2
Fig. 29
S8329
MBtu/hr (GCV)
1
p (“WC)
2
p (“WC)
RLS 300
/E
5112
3.3
0.63
5680
3.7
0.79
7574
4.9
1.38
9467
5.4
2.13
11361
5.9
3
13254
7.9
4.2
14390
9
5.1
RLS 400
/E
6816
2.3
1.1
7574
3
1.38
9467
4.7
2.13
11361
6.4
3
12307
7.3
3.62
13254
8.3
5.17
15148
10.8
5.47
17042
13
7
RLS 500
/E
9467
4.4
1.81
11361
6
2.64
13254
7.7
3
15148
9.7
3.82
17042
11.8
4.64
18935
14.1
5.55
19692
15
5.9
RLS 65
0/E
11362
2.8
1
13255
4
1.4
15149
5.1
1.8
17043
6.2
2.2
18936
7.7
2.8
20830
9.3
3.3
22724
10.9
4
24617
12.6
4.7
24805
13.1
4.9
RL
S 8
00/E
13255
4.5
1.1
15149
6
1.4
17043
7.5
1.8
18936
8.9
2.2
20830
10.4
2.6
22724
11.9
3.1
24617
13.9
3.7
26511
15.3
4.3
28405
17.6
4.9
30299
19.9
5.6
Summary of Contents for RLS 300/E
Page 2: ......
Page 50: ...20036644 48 GB Appendix Spare parts A Appendix Spare parts ...
Page 57: ......
Page 58: ......
Page 59: ......
