6435-1 | 800 °F Main Air, Cold Atomizing Air
Main Air Pressure osi/"w.c./mbar
Burning Natural Gas
osi
0.2 0.3 0.9
1
4
9
16
30
"w.c. mbar
1.7
6.9 17.2 410 (11.0)
15.6
27.7
51.9 129 1130
4.3 190
39
69
Main Air Flow, stoich. ratio
scfh
110
630
840
(Nm 3 /h)
(2.94)
(5.08)
(16.8)
(22.5)
(30.2)
Atom. Air Flow @ 8 osi/35.5 mbar stoich. ratio
scfh
50
50
45
45
40
35
(Nm 3 /h)
(1.34)
(1.34)
(1.20)
(1.20)
(1.07) 1015 (27.1)
(0.94) 1300 (34.7)
† Total Air Flow, stoich, ratio
scfh
295
375
590
810
(Nm 3 /h)
(7.89)
(10.0)
(15.8)
(21.7)
Gas Flow stoich. ratio
scfh
29
37
59
81
101
130
(Nm 3 /h)
(0.78)
(0.99)
(1.58)
(2.17)
(2.70)
(3.47)
Gas pressure stoich. ratio Tile pressure stoich. ratio
"w.c. (mbar) "w.c. (mbar)
0.36 (0.9) 0.26 (0.6)
1.0 (2.4) 0.6 (1.6)
2.1 (5.2) 1.2 (2.9)
3.8 (9.5) 2.2 (5.6)
6.1 (15.1) 3.6 (9.0)
10.4 (25.9) 6.2 (15.5)
‡ Max. % XSAir Stablility UV Flame supervision
100 100
150 150
250 250
350 350
350 350
400 400
Max. % XSAir Ignition--pilot
Max. % XSFuel
30
30
30
30
30
30
Flame length stoich. ratio Flame diameter stoich. ratio
inch (mm) inch (mm)
3 (76)
4 (102) 2.0 (51)
6 (152) 2.0 (51)
8 (203) 2.0 (51)
10 (254) 2.0 (51)
10 (254) 2.0 (51)
2.0 (51)
Burning #2 Oil
Main Air Flow, stoich. ratio
scfh
75
190
410
620
840
1140
(Nm 3 /h)
(2.00)
(5.08)
(11.0)
(16.6)
(22.5)
(30.5)
Atom. Air Flow @ 30 osi/129 mbar stoich. ratio
scfh
110
110
115
115
115
115
(Nm 3 /h)
(2.94) 320 (8.6) 0.23 (.87)
(2.94)
(3.07)
(3.07)
(3.07) 1090 (29.1)
(3.07) 1385 (37.0) 0.98 (3.71)
† Total Air Flow, stoich, ratio
scfh
435
650
870
(Nm 3 /h)
(11.6) 0.31 (1.17)
(17.4) 0.46 (1.74)
(23.3)
Oil Flow stoich. ratio
gph (lph)
0.61
0.77
(2.31)
(2.91)
Oil pressure stoich. ratio Tile pressure stoich. ratio
psi (mbar) "w.c. (mbar)
0.1 (6.9)
0.1 (6.9) 0.43 (1.1)
0.1 (6.9) 1.5 (3.7)
0.1 (6.9) 2.4 (6.0)
0.2 (13.8) 4.0 (9.9)
0.51 (35.2) 6.6 (16.4)
0 (0)
‡ Max. % XSAir Stability UV Flame supervision
10 10 25
10 10 25
10 10 25
25 25 25
75 75 25
100 100
Max.% XSAir gnition--pilot
Max. % XSFuel
25
Flame Length stoich. ratio Flame diameter stoich. ratio
inch (mm) inch (mm)
1 (25)
3.0 (76) 1.0 (25)
5 (127) 2.0 (51)
6 (152) 2.0 (51)
9 (229) 2.0 (51)
10 (254) 2.0 (51)
1.0 (25)
Because of the small size of the burner, the capacities when run with elevated air temperatures become very small and fuel rate (especially oil) become extremely difficult to set. The burner operating limits become much narrower with hot air.
The external metal temperatures recorded with neutral furnace pressure and in cold chamber with preheated air were as follows:
Metal temperature °F (°C)
Preheat Air
Body
Body
Backplate
temperature, °F (°C)
(near flange) (main air inlet flange )
400 (204) 600 (316) 800 (427)
325 (163) 380 (193) 420 (216)
310 (154) 380 (193) 430 (221)
270 (132) 350 (177) 410 (210)
† Total air is main air plus atomizing air plus 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. Bulletin 6435 Page 15
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