North American 4725- -EH Radiant Tube Burners for Preheated Air
Sheet 4725-5 Ref: Bulletin 4725
DESCRIPTION
The 4725- -EH Direct Spark Ignited Burner is capable of operation with preheated combustion air up to 900°F. The primary air adjustment plug assembly is upgraded to withstand these temperatures. The gas adjustment cartridge furnished with standard cold air burners is omitted. A conventional 1807 Valve must be used, piped as close to the burner as is practical. (Priced Separately.)
Special L dimensions, for mounting in various wall thickness and special tubes, are offered in ½ inch increments.
SIZING
Air rates, and primary air settings, are the same as for the cold air versions de- scribed in Bulletin 4725. When sizing the burner for use with specific air temperatures, make the usual correction in air capacity per the formula on page 147, North American Combus- tion Handbook, either Second or Third Edition. It is prudent to calculate burner input at 10% XSAir.
DIMENSIONS
These burners conform to all dimensions shown for corresponding sizes in Bulletin 4725.
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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