Capacities | 6570 HiVAM ™
TABLE 1. Main Air Capacities--scfh Burning with 50% excess air, which is the rich limit. Therefore, for maximum Btu/hr, divide by 1.5 and multiply by 100. Burner Main air pressure drop across burner in osi designation 0.2 1 4 9 16 † Gas 9 000 13 500 39 300 59 000 80 000 6570-9 Oil 10 300 21 000 42 500 63 500 83 000 Gas 20 100 45 500 81 500 122 000 170 000 6570-12 Oil 20 400 45 600 87 500 127 000 169 000
† 16 osi air is the maximum firing rate.
TABLE 2. Capacities in scfh not burning (for sizing blowers)
Atomizing Air
Burner
Main Air Atomizing Air
on Oil
designation at 16 osi
on Gas
at 20 osi
6570-9 6570-12
96 000 2600 at 14 osi 186 000 3400 at 10 osi
3550 5650
TABLE 3. Maximum Excess Air Percentages (with flame supervision and without pilot) Main air pressure drop Burner across the burner in osi designation 1 9 16 6570-9 Gas 1000 1200 1000 Oil 200 1200 850 6570-12 Gas 1000 1300 1500 Oil 125 850 1300 TABLE 4. Flame dimensions with 50% excess air length diameter Main air pressure drop Burner across burner, osi designation 1 9 16 6570-9 Gas 3 ½ ' x 1' 4' x 1' 3 ½ ' x 1' Oil 4' x 1' 5 ½ ' x 1' 5 ½ ' x 1'
Gas 7 ½ ' x 1 ½ ' 8 ½ ' x 2'
8' x 2'
6570-12
Oil 6' x 1 ½ '
10' x 2' 10 ½ ' x 2'
Bulletin 6570 Page 3
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