Dimensions | Hot Air Burners
Bulletin 6825 Page 3
CLEARANCE DIMENSIONS (for details, see Dimensions 6825)
B ‡
D sq.
C
A - Main Air conn.†
E
7"
DIMENSIONS SHOWN ARE SUBJECT TO CHANGE. PLEASE OBTAIN CERTIFIED PRINTS FROM FIVES NORTH AMERICAN COMBUSTION, INC. IF SPACE LIMITATIONS OR OTHER CONSIDERATIONS MAKE EXACT DIMENSION(S) CRITICAL .
Approx. flame lengths (ft)
dimensions in inches
Burner designation
A †
B ‡
C 4 4 4 5 5
D
E
Ambient
1000°F
6825-2 6825-3 6825-4 6825-5 6825-6
4 4 4 4 4 6 6 6
10 10 10 10 10 12 12 12
14 14 14 14 14 16 16 16
19 15⁄16 19 15⁄16 19 15⁄16 19 15⁄16 19 15⁄16 24 5⁄8 24 5⁄8 24 5⁄8
2
2 2 2 3
2-2 ½ 2-2 ½
2-2 ½
3-4
3-3 ½
6825-7-A 6825-7-B 6825-8-A
7 7 7
4 ½
4
4 ½ -5
4-4 ½ 4 ½ -5
5-6
Specify order of assembly by giving designators for the pilot boss, gas inlet, and atomizing air inlet relative to the main air connection located at 12 o'clock. The pilot* and main air cannot have the same position since the air flange would interfere with the pilot. Two ¾ " connections on either side of the pilot boss accommodate an observation port (included with burner); the other is for UV mounting. To order, specify: 6825- (code) - (A or B if applicable) Burner complete (specify Arrangement Designator--see sketch). If Z dimension is applicable, range is 2" to 9" by 0.5" increments, written as a two-figure decimal. Examples: 6825-7-A Burner complete, Arrangement 3af 6825-5-Z Burner complete, Arrangement 1df, with Z dimension 7.5".
main air conn.
3 1 2
Pilot position designators* are
a
a c d b
Gas connection position designators are
f
3
h f g e
Atomizing air designators† are
* Good practice dictates that neither pilot nor flame detector be on the bottom as installed. view from outside furnace
† Except for -8-A, smaller main air piping can be used in most cases. Use standard sizing methods for air temperature and pressure available to determine what is economically advantageous. ‡ Furnace opening should be ½ " larger than dimension B. A "6825 Burner Complete" includes an 8790-0 Observation Port. Recommended Pilot Tip is 4021-12. Optional (recommended) Sensitrol™ Oil Valve is not included as part of the burner assembly, and must be ordered separately.
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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