Product Overview | 6796 Magna-Flame ™
FEATURES
See Bulletin 8832 for selection of UV adapters. It is possible for a UV scanner mounted on this burner to sight flame(s) of other burners in the same firing chamber. Consult Fives North American Combustion, Inc. for configuration guidance on multiple burner applications. On burners using steam atomization, the UV detector on the burner will pick up only the pilot. An additional detector must be mounted on the side of the furnace to sight on the base of the main flame. Check with North American for additional details. CONTROL. If atomizing steam is throttled along with oil and air, 5 to 1 turndown from 8 osi high fire air rate is obtainable. If steam pressure is left constant, only about 3 to 1 turndown is obtainable, and steam pressure must be reduced for low fire lighting. Gas pressure required is approximately 0.6 times the air pressure. Maximum excess air rates of 50% at low fire and 150% at high fire are suggested, although proper conditions may permit exceeding these limits. INSTALLATION. The burner dœs not include a tile. Tunnel shape shown on the dimension drawing (page2) must be built into the combustion chamber wall. See Supplement DF-M1 for installation recommendations. REPLACEMENT AND SPARE PARTS. NOTE: In June, 2009, the 6796 burner was redesigned to change from a square mounting flange to round and replace the threaded gas connection with a flanged gas tee. When replacing burners, or ordering parts, please inform your sales professional of the complete part number, sales order and/or manufactured date. This information is stamped on a tag located on the burner back plate.
— Broad stability range — Chambers up to 2200°F — Includes high pressure tip emulsion atomizer
6796 MAGNA-FLAME™ DUAL FUEL BURNERS use high pressure atomization (70 to 100 psi steam or compressed air), and are designed to fire combustion chambers of limited length but with sufficient width to allow the flame envelope to develop. They are well suited to cubic combustion chambers typical of coal-fired water tube boilers. ATOMIZER . Series 6796 burners incorporate an efficient 5646 tip-emulsion atomizer that can be used with #2 or #6 oil (heated to reduce its viscosity to 100 SSU). The burner may be operated on oil or gas. The atomizer should be retracted (6") during gas only operation. Adjustable external and internal stops on the atomizer, as well as a packing gland, allow repositioning the atomizer to its exact predetermined location for oil firing. "Maximum" steam and compressed air consumption rates shown below are with no oil flowing. Actual usage will always be less--from 1.5 to 2.8 pounds of steam (or 34 to 63 scf air) per gallon of oil, depending on the quantity of oil being atomized. (Use figures shown below to size piping--not to determine cost of the atomizing medium.) IGNITION and FLAME SUPERVISION . Magna-Flame Burners should be pilot ignited. The 4014 gas-boosted pilot (sold separately) listed in the dimension table is required, and provision must be made for low fire start with 1.0"w.c. or less main air. Pilot operation must be interrupted to prevent overheating of the mounting. The UV detector location should be 90° clockwise of the pilot when viewing rear of burner (in the direction of air swirl). Self-checking UV scanners (sold separately) are recommended for flame supervision.
Bulletin 6796 page 2
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