6435-5 with Cold Main Air, Cold Atomizing Air
Main Air Pressure osi/"w.c./mbar
Not Burning Main Air Flow scfh (Nm 3 /h)
12 100 (323)
Atom. air, scfh (Nm 3 /h) @ 30 osi/51.9"w.c./129 mbar Atom. air, scfh (Nm 3 /h) @ 8 osi/13.8"w.c./34.5 mbar
700 (18.7) 520 (13.9)
Burning Natural Gas
osi
0.2 0.3 0.9 895
1
4
9
16
"w.c. mbar
1.7
6.9 17.2
15.6
27.7
4.3
39
69
Main Air Flow, stoich. ratio
scfh
2060 (55.1)
4460
6950 (189)
9500 (254)
(Nm 3 /h)
(23.9)
(119) 485
Atom. Air Flow @ 8 osi/35.5 mbar stoich. ratio
scfh
520
510
450
400
(Nm 3 /h)
(13.9) 1600 (42.8)
(13.6) 2760 (73.8)
(13.0) 5150 (138)
(12.0) 7600 (203)
(10.7)
† Total Air Flow, stoich, ratio
scfh
10 100 (270) 1010 (27.0)
(Nm 3 /h)
Gas Flow stoich. ratio
scfh
160
276
415
760
(Nm 3 /h)
(4.28)
(7.38)
(13.8)
(20.3)
Gas pressure stoich. ratio Tile pressure stoich. ratio
"w.c. (mbar) "w.c. (mbar)
0.17 (0.4) 0.17 (0.4)
1.4 (3.4) 0.7 (1.7)
4.85 (12.1) 2.4 (6.0)
10.9 (27.1) 18.7 (46.5)
6.1 (15.1)
10.0 (25.0)
‡ Max. % XSAir Stablility UV Flame supervision
20 20 20 30
250 250
400 400
350 325
350 200 100
Max. % XSAir Ignition--pilot
Max. % XSAir Ignition--direct spark
65 30
60 30
75 30
Max. % XSFuel
10
Flame length stoich. ratio Flame diameter stoich. ratio
inch (mm) inch (mm)
12 (305) 4.0 (76)
18 (457) 4.0 (76)
19 (483) 5.0 (127)
19 (483) 6.0 (152)
19 (483) 6.0 (152)
Burning #2 Oil
Main Air Flow, stoich. ratio
scfh
895
2110
4760 (127)
7450 (199) 640 (17.1) 8280
10 000
(Nm 3 /h)
(23.9)
(56.4)
(267)
§ Atom. Air Flow @ 30 osi/129 mbar stoich. ratio
scfh
695
690
670
585
(Nm 3 /h)
(18.6) 1780 (47.6)
(18.4) 2990 (79.9)
(17.9) 5620 (150)
(15.6)
† Total Air Flow, stoich, ratio
scfh
10 775
(Nm 3 /h)
(221)
(288)
Oil Flow stoich. ratio
gph (lph)
1.1
2.0
3.9
5.8
7.6
(4.16)
(7.57)
(14.8)
(22.0)
(28.8)
Oil pressure stoich. ratio Tile pressure stoich. ratio
psi (mbar) "w.c. (mbar)
1.0 (69)
1.2 (83) 0.9 (2.2)
1.4 (97) 2.2 (5.6)
1.6 (110) 4.8 (12.1)
1.8 (124)
0.14 (0.3)
9.0 (22.4)
‡ Max. % XSAir Stability UV Flame supervision
25 25
125 125 20+
275 275
300 225
350 150
Max. % XSAir. Ignition--pilot
Max. % XSFuel
20+
20
20
20
Flame Length stoich. ratio Flame diameter stoich. ratio
inch (mm) inch (mm)
10 (254) 3.0 (76)
14 (356) 4.0 (76)
24 (610) 5.0 (127)
24 (610) 6.0 (152)
24 (610) 6.0 (152)
† Total air is main air plus atomizing air plus 190 scfh for pilot air. ‡ Honeywell Ultravision Flame Detector C7027A and Honeywell Flame Supervision ProtectoRelay RA890G yielded 1.5 micro amps or greater for all above rates. § 30 osi is recommended atomizing air pressure for oil, but all burners will operate on oil with 22 osi atomizing air (at the burner) and 10% or more excess air.
■ Electrode setup used was that shown in drawing B4-7249. The cooling air was le on for ignition tests. • Direct spark ignition on oil is not considered a viable lighting method due to the lack of repeatability.
▲ Figure includes 110 scfh air for cooling on spark for #2 oil. Figure includes 75 scfh air for cooling on spark for natural gas. Velocity: The distance (in inches) from the tile outlet to the point where the tile velocity pressure is 0.1"w.c. (1259 fpm) is 130" on gas and 130" on oil (firing stoichiometric with 16 osi main air pressure). Bulletin 6435 Page 13
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