North American Evenglow 4723 Burners Engineering Data
TABLE 1 Cold Air (60°F) Capacities and Excess Air Limits For capacities in Btu/hr multiply cfh air by 100 (use 91 for 10% excess air)
Sheet 4723-2
30% Primary Air
Burner Size XSAir Limit 4723-2-E, -G % excess Air 4723-3-E, -G % excess Air 4723-4-E, -G % excess Air
No. Turns Open 30%
20% Pri. 40% Pri.
0.2 osi 0.5 osi
1 osi
4 osi
9 osi
16 osi
16 osi
16 osi
3.5
240
375
585
1190
1785
2380 275%
2035 350%
2670 250% 3825 300% 6500 150%
250%
250%
250%
250%
300%
3.5
345
565
890
1685
2565
3420 450%
2910
250%
300%
300%
450%
500% 4270 350%
600% 5000 400%
2
581
965
1365
2785
5740
250%
300%
300%
400%
300%
4723-4B-E, -G % excess Air
4
800
1325
2005 250%
3905 300%
5960 300%
7785
6810† 250%
‡ ‡
350%
300%
300%
4723-5-E, -G % excess Air
2
1420
1930
2530 300%
5015
7500 300%
9925 325%
9130
11385 350%
350%
350%
300%
300%
4723-6-E, -G % excess Air
5
1695
2235 350%
3235 350%
7115
10840 300%
14535 250%
13200 275%
* *
350%
275%
TABLE 2 Hot Air (800°F) Capacities and Excess Air Limits For capacities in Btu/hr multiply cfh air by 100 (use 91 for 10% excess air)
30% Primary Air
Burner Size XSAir Limit 4723-2-E, -G % excess Air 4723-3-E, G % excess Air 4723-4-E, -G % excess Air
No. Turns Open 30%
20% Pri. 40% Pri.
0.2 osi 0.5 osi
1 osi
4 osi
9 osi
16 osi
16 osi
16 osi
3.5
190
295
415
835
1250
1670
1425
1875
375%
275%
375%
450%
550%
500%
600%
500%
3.5
225
370
580
1105
1680
2240 500% 3870 450%
1905
2505 500% 4385 375%
375%
400%
375%
500%
650% 2905 650%
600% 3375 550%
2
435
685
970
1935
500%
500%
500%
600%
4723-4B-E, -G % excess Air
4
615
975
1345
2785 250%
4180
5365 275%
4695† 250%
‡ ‡
500%
350%
500%
250%
4723-5-E, -G % excess Air
2
910
1235
1710
3200 300%
4840 300%
6445 275%
6015
7410
350%
350%
275%
300%
275%
4723-6-E, -G % excess Air
5
1300
1735
2390 275%
4770 275%
7370 275%
9705 275%
8855 275%
* *
350%
325%
Notes: 1. To find the approximate air capacity at 20% primary multiply 30% primary flow by 0.875. 2. To find the approximate air capacity at 40% primary multiply 30% primary flow by 1.17. 3. Capacities in Table 1 and 2 do not include pilot air or jet air. * The maximum primary air for the -6 burner is 30%. ‡ The maximum primary air for the -4B burner is 32%. † The minimum primary air for the -4B burner is 15%. 20% primary is one turn open.
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