Burner Firing Arrangements Spec 142 The ... - …

1 Burner Firing ArrangementsThe AH Burner can fire in any direction. Flowthrough the Burner s check valve, however, must behorizontal. A guide for identifying some standard ar-rangements is shown FiringBe sure to indicate the appropriate number arrange-ment when ordering. If no ar rangement is indicated,No. 1 will be furnished as InletNo. 1(Standard)Gas InletNo. 2 Gas InletVertical Firing UpVertical Firing DownAir InletNo. 3 Gas InletNo. 4 Gas InletAir InletNo. 6 Gas InletNo. 5 Gas InletOn End FiringOn End FiringAir InletNo. 9 Gas InletNo. 8 Gas InletAir InletNo. 10 Gas InletNo. 7 Gas InletSpec 14211/4/03 Eclipse RAH and TAH-R Air Heat Burners areline type burners ideal for generating large volumesof clean, hot air. Combustion air is supplied by a com-bustion air blower located outside the duct. This al-lows the burners to operate in recirculating airstreamswith air temperatures upstream of the Burner as highas 750 F (400 C).

2 Applications include ovens, dryers,fume incinerators, and similar industrial combustion air is supplied to the burnerfrom outside the duct, RAH and TAH-R burnersprovide stable operation over a wide range of duct ve-locities without installing a profile plate around theburner. Low NOx, CO and aldehydes. Exceptional flame stability with duct velocitiesfrom 500 to 6000 fpm ( to m/s.) Recirculating air temperatures up to 750 F(400 C) upstream of the Burner . No profiling required. Up to 40:1 gas turndown. Inputs up to 1,000,000 Btu/hr. per lineal foot ofburner (962 kW/m) As little as 10% excess air at high fire; whenmounted on the duct wall, no oxygen is requiredfrom the process airstream. Wide range of configurations, packages, , Front ViewData 142-2 TAH-R, Back ViewData 142-2 RAH, Front ViewData 142-1 RAH, Back ViewData 142-1 ECLIPSE AIR HEAT BURNERSS eries RAH & TAH-R For Recirculating Reissue Pat.

3 No. 26,244 Canadian Pat. No. 743,782 Mounting Arrangement Provide at least 3" (76 mm) clearance between burnerand top, bottom and sides of the duct. Profile plates are not required for good Burner opera-tion, but uniform velocity must be maintained for fulllength of Burner . If velocity is not uniform, use profileplates to correct :1,000,000 Btu/hr. per lineal foot (962 kW/m).Fuels:Natural gas or 100% propane vapor. Call Eclipse for information on using other Turndown:40:1 Pilot Input:Approximately 25,000 Btu/hr. ( kW)Gas Inlet Pressure:800,000 Btu/hr/ft. (769 kW/m):Nat. Gas: " mbarPropane: " mbar1,000,000 Btu/hr/ft. (962 kW/m):Nat. Gas: " mbarPropane: " mbarGas pressure shown is a differential measured between the gas inlet and a tap onthe duct wall 10" to 20" (254 to 508 mm) downstream of the Length*:800,000 Btu/hr.

4 (769 kW/m):28" m1,000,000 Btu/hr. (962 kW/m):46" mPiloting:Integral spark-ignited pilot; ignition plug Monitoring:Flame rod supplied. UV scanner adaptors are available. For UV scanners, Eclipserecommends a flame monitoring system that terminates the ignition spark andproves the pilot flame without spark prior to opening the main gas requires two flame rods on burners over 36" long (914 mm). Use a flamemonitoring endplate (see Data 140-6) to mount a second flame rod on the endopposite the gas :All portions of the Burner exposed to flame are cast iron or #321 stainless :Emissions performance depends not only on the Burner ,but also other factors such as chamber temperature, chamber design, and heat load-ing. For estimates of emissions performance in your application, call Options:Available with complete valve trains and control systems.

5 RAH burners and systemscan be supplied mounted on duct sections as specified by the customer. Call Eclipsefor information on custom packaged :ModelDescriptionData SheetRAH Line-shapeData 142-1 TAH-R I -shapeData 142-2* Based on parallel air flow. If mounted in a cross flow, then flame will be : It is dangerous to use any fuel burning equipment unless it is equipped with suitable flame sensing devicesand automatic fuel shut-off valves. Eclipse can supply such equipment or information on alternate Center the Burner in the duct. Allow a minimum of 46" (1168 mm) from Burner tonearest point of possible flame impingement at aninput of 1,000,000 Btu/hr. (962 kW/m). Support the blower and motor independently of for Mounting F(815 C) Velocity: 500 to 6000 to m/s1000 to 4000 to m/sOptimum Velocity:NOTE: The blower and the adjoining duct (shown in the darkershaded areas) are not part of the Burner assembly; theymust be purchased and installed F(400 C)Blower SizingBlower Pressure Calculation Pressure SystemExample 1 Max.

6 Duct Press: 30" Duct Press: 9" Press. = 2 (30") 9" = 51" 2 Max. Duct Press: " Duct Press: " Press. = 2 ( ") " = " : On pressure systems, the blowerpressure must be at least " morethan the maximum duct pressure. InExample 2, the blower pressure should " + " = " Pressure Calculation Suction SystemOn suction systems, no blower is needed ifduct pressure is always " or less,and the ratio of lowest to highest pressureis no greater than 1 Max. Duct Press: 6" Duct Press: 20" the ratio of lowest pressure tohighest is , a blower is required:Blower Press. = 2 ( 6") ( 20") = 8" 2 Max. Duct Press: " Duct Press: " Press. = 2 ( ") ( ") = " : On suction systems, the blowerpressure must be at least " morethan the minimum duct pressure. InExample 2, the blower pressure should be " + " = " Pressure Calculation Suction-to-Pressure SystemExample 1 Max.

7 Duct Press: 2" Duct Press: " Press. = 2 (2") ( ") = 5" 2 Max. Duct Press: " Duct Press: " Press. = 2 ( ") ( ") = " : On pressure-to-suction systems,the blower pressure must be at least " more than the maximum ductpressure. In Example 2, the blowerpressure should be " + " = " Volume:Select a blower capable of producing 13,000 cfh per lineal foot of Pressure:= 2 (Max. Duct Press.) Min. Duct that ignition can be accomplished within 15 seconds. (Reference NFPA )Burners over 5 lineal feet include flame supervision at the far end. If pilot ignition is beingused, two flame supervision units are required; one for the pilot and one for the far using direct spark on the main flame, only flame supervision at the far end is requiredMounting Arrangement Provide at least 3" (76 mm) clearance between burnerand top, bottom and sides of the duct.

8 Profile plates are not required for good Burner opera-tion, but uniform velocity must be maintained for fulllength of Burner . If velocity is not uniform, use profileplates to correct :1,000,000 Btu/hr. per lineal foot (962 kW/m).Fuels:Natural gas or 100% propane vapor. Call Eclipse for information on using other Turndown:40:1 Pilot Input:Approximately 25,000 Btu/hr. ( kW)Gas Inlet Pressure:800,000 Btu/hr/ft. (769 kW/m):Nat. Gas: " mbarPropane: " mbar1,000,000 Btu/hr/ft. (962 kW/m):Nat. Gas: " mbarPropane: " mbarGas pressure shown is a differential measured between the gas inlet and a tap onthe duct wall 10" to 20" (254 to 508 mm) downstream of the Length*:800,000 Btu/hr. (769 kW/m):28" m1,000,000 Btu/hr. (962 kW/m):46" mPiloting:Integral spark-ignited pilot; ignition plug Monitoring:Flame rod supplied. UV scanner adaptors are available.

9 For UV scanners, Eclipserecommends a flame monitoring system that terminates the ignition spark andproves the pilot flame without spark prior to opening the main gas requires two flame rods on burners over 36" long (914 mm). Use a flamemonitoring endplate (see Data 140-6) to mount a second flame rod on the endopposite the gas :All portions of the Burner exposed to flame are cast iron or #321 stainless :Capable of operating at less than 35 ppm NOx or less than 100 ppm CO, dependingupon operating conditions. Emissions performance depends not only on the Burner ,but also other factors such as chamber temperature, chamber design, and heat load-ing. For estimates of emissions performance in your application, call Options:Available with complete valve trains and control systems. RAH burners and systemscan be supplied mounted on duct sections as specified by the customer.

10 Call Eclipsefor information on custom packaged :ModelDescriptionData SheetRAH Line-shapeData 142-1 TAH-R I -shapeData 142-2* Based on parallel air flow. If mounted in a cross flow, then flame will be : It is dangerous to use any fuel burning equipment unless it is equipped with suitable flame sensing devicesand automatic fuel shut-off valves. Eclipse can supply such equipment or information on alternate Center the Burner in the duct. Allow a minimum of 46" (1168 mm) from Burner tonearest point of possible flame impingement at aninput of 1,000,000 Btu/hr. (962 kW/m). Support the blower and motor independently of for Mounting F(815 C) Velocity: 500 to 6000 to m/s1000 to 4000 to m/sOptimum Velocity:NOTE: The blower and the adjoining duct (shown in the darkershaded areas) are not part of the Burner assembly; theymust be purchased and installed F(400 C)Blower SizingBlower Pressure Calculation Pressure SystemExample 1 Max.