Arrangement Designators 

are specifi ed relative to the main 

air connection at 12 oclock and should be listed for 

pilot, 

gas, fl ame supervison and atomizing air in that order.

‡ 

Good practice dictates that neither the pilot nor the fl ame detector be below the centerline of a horizontally-mounted burner.

ORDER MUST SPECIFY

: (1) Burner designation (such as 6821-16-54); (2) Arrangement designation for pilot, gas connection, fl ame safety and 

atomizing air connection positions in that order such as 6821-16-54, arrangement 3a1E (for the arrangement shown above). 

outside 

furnace view

atomizing air connection position designators are

pilot position designators ‡ are

fl ame supervision designators ‡ are
(must be 90, 135 or 180° from pilot)

gas connection position designators are

main 

air conn.

 

Furnace opening should be ½ " larger than dimension EE for 
10A thru 14 and ¾" larger than dimension EE for 16 thru 22.

 

Whenever the tile length is greater than DD × 1.2, the tile 
beyond DD should fl are out at a 30° angle (60° included 
angle).

 

Flat face companion fl ange available upon request.

 

 

 

Burner 

      

       

Designation A  B

 C  D 

F  G  H

°

 J K L M N

°

 P  Q  R  S  T  U  V

6821-10-A 10 

2.5 

2  

3⁄8

 0.75 0.75 4 45  5.5 7  1  12  15  14.25 16  16  20.5  22.25  11.75 11

6821-10-B 10 

2.5 

2  

3⁄8

 0.75 0.75 4 45  5.5 7  1  12  15  14.25 16  16  22.5  24.25  13.75 12.5

6821-12 

12  3     2.5   

3⁄8

 0.75 0.75 4 45  6  7.5 1  12  15  17 

19  16  24.5  26.25  14.75 13.5

6821-14 

14  4     3 

 

3⁄8

 0.75 0.75 8 22.5 7.5 9  1.13 12  15  18.75  21  20  26.5  28.25  14.81 14.5

6821-16 

16  4     3 

 

3⁄8

 0.75 0.75 8 22.5 7.5 9  1.13 16 11.25 21.25 23.5 20  28.5  30.25  14.81 15.5

6821-18 

18  4     4 

 

½  

 0.88 0.75 8 22.5 7.5 9  1.25 16 11.25 22.75 25  20  30.5  32.25  14.81 16.5

6821-20 

20  6     4 

 

½  

 0.88 0.88 8 22.5 9.5 11  1.25 20  9  25 

27.5  24  32.5  34.25  15.5  17.5

6821-22 

22  6     4 

 

½  

 0.88 0.88 8 22.5 9.5 11  1.25 20  9  26 

29.5  24  34.5  36.25  15.5  18.5

  

 

Burner 

                

Estimated Recommended

Designation W 

X  Y 

Z  AA  BB  CC DD

 EE

 

FF 

GG 

HH 

weight, lb 

pilot assy.

6821-10-A 1.75  12.25 

13.06 

9.5 40.19 

 

¾  

 1.5 

10 16 72  9  6.25 

351 

4014-2-T

6821-10-B 1.75  15  13.94 

9.5 43.81 

 

¾  

 1.5 

11 18 79  9  7 

451 

4014-2-T

6821-12 2.38 17.5 

15.44 

10.5 

49.19 

 

¾  

 2 12.5 

20 88  11  8.5 

588 

4014-3-AT

6821-14 5.19 18.5 

16.88 

10.5 

51.88 

 

¾  

 2 14.75 

22 95 13.63 

10 

727 

4014-3-AT

6821-16 5.19 19 

17.25 

10.5 

52.75 

2 2 17 24 

99 15.63 

11.25  807 

4014-3-AT

6821-18 7.88 19.5 

18.88 

15.5 

60.56 

2 2 19.25 

26 

112 17.63 

12.75  950 

4014-3-BT

6821-20 7.88 20.5 

21.25 

15.5 61.44 

2 2 21.5 

28 

116 19.63 

14.25  1045 

4014-3-BT

6821-22 7.88 21.5 

23.13 

15.5 

66.81 

2 2 24 30 

120 21.63 

15.75  1183 

4014-3-BT

DIMENSIONS IN INCHES AND DEGREES

DIMENSIONS IN INCHES

Cop

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Bulletin 6821

Page 4

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.

Dimensions | 6821 Magna-Flame

Fives North American Combustion, Inc. 

4455 East 71st Street - Cleveland, OH 44105 - USA

www.fi vesgroup.com

CONTACT

fna.sales@fi vesgroup.com
T +1 800 626 3477 - F +1 216 373 4237

Catalog Combustion 2021 - Page 0815

Fives Group
FIVES GROUP
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