Sheet 4452-2 Page 2
SYSTEM DESIGN & INSTALLATION 1. The 4452 burner was primarily designed for vertical down firing up to 1400°F, or 1600°F with optional material upgrades. Horizontal firing is acceptable for firing chambers at 1200°F and below. 2. Always provide main gas metering orifices. Air flow can be estimated using body pressure readings. If increased accuracy is desired, use a meter on the air line too. 3. Ratio and emissions control is much better if an individual ratio regulator is used for each burner. Do not use one regulator for multiple burners at different vertical levels on a furnace. The differ- ence in gas pressure due to the "head" of gas affects the low fire setting and may cause rough lighting, overheating, or high emis- sions. 4. Install the gas adjustment valve as close to the burner as possible (within 2 feet is best). 5. The burner mounting plate and FGR collector flange must be sealed tightly to the furnace shell so that no external air can be drawn into the burner. Air leaks around the mounting flange will increase NOx emissions. 6. Either UV scanner or flame rods can be used for flame supervision on the 4452. A UV scanner applied to this burner will detect the di- rect igniter's spark. A UV-based flame supervision system must be designed to ignore this detection by use of an appropriate flame relay, or other code-compliant means, to prevent interruption of the ignition sequence. 7. A ¾ inch observation port is provided on the burner, but if an additional or larger observation port is desired the fuel inlet can be piped with a tee and the extra observation port added to "look down" the gas inlet. 8. The 4452 has built in purge air holes for the UV and observation port tunnels, so external purge air is not necessary. If extra cooling air is required for the UV, use a sealing window (Bulletin 8832) to prevent the extra air from entering the burner. 9. Make certain that the burner is at low fire (below 2 osi) before lighting. If using thermal turndown the fuel valve should be set at its minimum (low fire) setting before lighting. The spark must be turned on before, or at the same time as, the fuel. 10. Use a constant spark during ignition. A spark distributor will not work reliably for direct spark ignition on a 4452. The spark must be turned off after ignition. 11. As the temperature in the furnace increases the recirculated flue gas (FGR) will heat the burner mounting plate to a temperature higher than the furnace shell. The air capacity of the burner will also drop 3-5% from the cold conditions as the burner temperature increases. 12. The 4452 is not designed to run with excess fuel. 13. Never operate the burner without the firing tube in place. BURNER MOUNTING 1. Remove FGR collector from burner assembly. 2. Cut hole in furnace shell large enough to accept FGR collector.
3. Weld FGR collector to furnace shell. The FGR collector flange must be sealed tightly to the furnace shell so that no external air can be drawn into the burner. (Figure 2) 4. Bolt burner assembly to FGR collector. (Figure 3) 5. Pipe air and gas connections, attach flame supervision devices and ignition source. 6. It is not uncommon to have wall or roof depth greater than 6". In this case expand opening to a minimum 30° all around (60° included). Neglecting to do this will result in higher fire tube tempera- ture, which in turn, can shorten tube life. (Figure 4)
Weld flange to shell
6"
Figure 2. FGR Collector attached to furnace shell.
Figure 3. Burner mounted on FGR collector.
6"
Figure 4. Burner installed in thick roof. 60° minimum
WARNING: Situations dangerous to personnel and property may exist with the operation and maintenance of any combustion equipment. The presence of fuels, oxidants, hot and cold combustion products, hot surfaces, electrical power in control and ignition circuits, etc., are inherent with any combustion application. Components in combustion systems may exceed 160°F (71°C) surface temperatures and present hot surface contact hazard. Fives North American Combustion, Inc. suggests the use of combustion systems that are in compliance with all Safety Codes, Standards, Regulations and Directives; and care in operation.
CONTACT fna.sales@fivesgroup.com T +1 800 626 3477 - F +1 216 373 4237
Fives North American Combustion, Inc. 4455 East 71st Street - Cleveland, OH 44105 - USA www.fivesgroup.com
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