6435-2 with Cold Main Air, Cold Atomizing Air
Main Air Pressure osi/"w.c./mbar
Not Burning Main Air Flow scfh (Nm 3 /h)
3000 (80.2)
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
150 (4.01) 65 (1.74)
Burning Natural Gas
osi
0.2 0.3 0.9 170
1
4
9
16
30
"w.c. mbar
1.7
6.9 17.2
15.6
27.7
51.9 129
4.3
39
69
Main Air Flow, stoich. ratio
scfh
500
1090 (29.1)
1660 (44.4)
2280 (60.9)
3430 (91.7)
(Nm 3 /h)
(4.54)
(13.4)
Atom. Air Flow @ 8 osi/35.5 mbar stoich. ratio
scfh
65
65
45
45
30
30
(Nm 3 /h)
(1.74)
(1.74)
(1.20) 1270 (33.9)
(1.20) 1850 (49.5)
(0.80) 2450 (65.5)
(0.80) 3600 (96.2)
† Total Air Flow, stoich, ratio
scfh
375
705
(Nm 3 /h)
(10.0)
(18.8)
Gas Flow stoich. ratio
scfh
37
71
127
185
245
360
(Nm 3 /h)
(0.99)
(1.90)
(3.39)
(4.95)
(6.55)
(9.62)
Gas pressure stoich. ratio Tile pressure stoich. ratio
"w.c. (mbar) "w.c. (mbar)
0.17 (0.4) 0.26 (0.6)
1.0 (2.5) 1.0 (2.6)
3.5 (8.7) 8.0 (19.9) 13.8 (34.3)
20.0 (50)
3.0 (7.5) 6.9 (17.2) 11.6 (28.9) 19.0 (47.4)
‡ Max. % XSAir Stablility UV Flame supervision
100 100 25+
350 350 25+
400 400 25+
400 400
400 400 25+
250 250
Max. % XSAir Ignition--pilot
Max. % XSFuel
25+
0
Flame length stoich. ratio Flame diameter stoich. ratio
inch (mm) inch (mm)
2.0 (51) 1.0 (25)
3.0 (76) 1.0 (25)
6.0 (152) 8.0 (203) 9.0 (229)
10.0 (254)
1.0 (25)
1.0 (25)
1.0 (25)
1.0 (25)
Burning #2 Oil
Main Air Flow, stoich. ratio
scfh
165
430 (11.5)
1070
1660 (44.4)
2280 (60.9)
3250 (86.9)
(Nm 3 /h)
(4.41)
(28.6)
§ Atom. Air Flow @ 30 osi/129 mbar stoich. ratio
scfh
150
145
145
140
140
120
(Nm 3 /h)
(4.01)
(3.88)
(3.88) 1360 (36.4)
(3.74) 1940 (51.9)
(3.74) 2560 (68.4)
(3.24)
† Total Air Flow, stoich, ratio
scfh
455
715
3510
(Nm 3 /h)
(12.2) 0.32 (1.21)
(19.1) 0.51 (1.93)
(93.8)
Oil Flow stoich. ratio
gph (lph)
0.96
1.39
1.83
2.5
(3.63)
(5.26)
(6.93)
(9.46)
Oil pressure stoich. ratio Tile pressure stoich. ratio
psi (mbar) "w.c. (mbar)
0.1 (6.9) 0.17 (0.4)
0.2 (13.8) 1.0 (2.4)
0.4 (27.6) 0.8 (55.2) 1.4 (96.5) 3.0 (7.5) 6.7 (16.8) 11.4 (21.3)
2.5 (172) 21.3 (53)
‡ Max. % XSAir Stability UV Flame supervision
25 25
50 50 +15
200 200
300 300
300 300
350 350
Max. % XSAir. Ignition--pilot
Max. % XSFuel
+15
+15
+15
+15
0
Flame Length stoich. ratio Flame diameter stoich. ratio
inch (mm) inch (mm)
5.0 (127) 1.5 (38)
6.0 (152) 1.5 (38)
5.0 (127) 9.0 (229)
10 (254) 2.0 (51)
11 (279) 2.5 (64
1.5 (38)
2.0 (51)
† Total air is main air plus atomizing air plus 135 scfh (3.6 Nm 3 /h) 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/52"w.c./129 mbar is recommended atomizing air pressure for oil, but all burner will operate on oil with 22 osi/38"w.c./95 mbar atomizing air (at the burner) and 10% or more excess air. • Direct spark ignition on oil is not considered a viable lighting method due to the lack of repeatability.
NOTE: Burner is stable on atomizing air only, but should not be operated below 0.2 osi main air to avoid overheating the tile.
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 56" on gas and 60" on oil (firing stoichiometric with 16 osi main air pressure). Bulletin 6435 Page 10
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