Technical description of the burner
15
20036644
3.9 Minimum furnace dimensions
The firing rates were set in relation to certified test boilers.
Fig. 6 indicates the diameter and length of the test combustion
chamber.
Example RLS 500/E:
Output 18500 MBtu/hr: diameter 39.4 inch - length 16.5 ft.
CORRECTED BURNER AIR PRESSURE ACCORDING TO ALTITUDE
Altitude
Rated Pressure
m a.s.l. 0 100 305 610 915 1220 1525 1830 2135 2440
ft a.s.l 0 328 1000 2000 3000 4000 5000 6000 7000 8000
0.50 0.49 0.50 0.51 0.53 0.55 0.57 0.59 0.62 0.64 0.67
1.00 0.99 1.00 1.02 1.06 1.10 1.14 1.19 1.23 1.28 1.34
1.50 1.48 1.50 1.53 1.59 1.65 1.71 1.78 1.85 1.92 2.01
2.00 1.97 2.00 2.05 2.12 2.20 2.28 2.37 2.46 2.56 2.67
2.50 2.47 2.50 2.56 2.65 2.75 2.85 2.96 3.08 3.21 3.34
3.00 2.96 3.00 3.07 3.18 3.30 3.43 3.56 3.70 3.85 4.01
3.50 3.46 3.50 3.58 3.71 3.85 4.00 4.15 4.31 4.49 4.68
4.00 3.95 4.00 4.09 4.24 4.40 4.57 4.74 4.93 5.13 5.35
4.50 4.44 4.50 4.60 4.77 4.95 5.14 5.33 5.54 5.77 6.02
5.00 4.94 5.00 5.12 5.30 5.51 5.71 5.93 6.16 6.41 6.69
5.50 5.43 5.50 5.63 5.83 6.06 6.28 6.52 6.77 7.05 7.35
6.00 5.92 6.00 6.14 6.36 6.61 6.85 7.11 7.39 7.69 8.02
6.50 6.42 6.50 6.65 6.89 7.16 7.42 7.71 8.01 8.34 8.69
7.00 6.91 7.00 7.16 7.42 7.71 7.99 8.30 8.62 8.98 9.36
7.50 7.40 7.50 7.67 7.96 8.26 8.56 8.89 9.24 9.62 10.03
8.00 7.90 8.00 8.18 8.49 8.81 9.13 9.48 9.85 10.26 10.70
8.50 8.39 8.50 8.70 9.02 9.36 9.71 10.08 10.47 10.90 11.37
9.00 8.88 9.00 9.21 9.55 9.91 10.28 10.67 11.09 11.54 12.04
9.50 9.38 9.50 9.72 10.08 10.46 10.85 11.26 11.70 12.18 12.70
10.00 9.87 10.00 10.23 10.61 11.01 11.42 11.86 12.32 12.82 13.37
Average barometric
pressure (20°C)
mbar 1013 1000 977.4 942.8 908.2 875.8 843.5 811.85 779.8 747.8
Average barometric
pressure (68°F)
"w.c. 399 394 385 371 358 345 332 320 307 294
15. 7 19. 7
23. 6
31. 5
39. 4 47. 2
ft
inches
ft= 0,12
MBtu/hr
18.9
11.3
7.5
1000
1.5
760
16.5
13.2
9.9
6.6
3.3
1.6
MBtu
hr
37870
23.0
29.6
22.7
Fig. 6
Diameter (inches)
Length (ft)
Furnace dimensions
D9396
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