Because of postive pressure in the burners, it is diffi

  cult to light with a torch unless the air is turned very low and a strong pressure torch is used.

 

Add 10% to fl ame dimensions shown for operation with #6 oil.

 

Subtract 10% from fl ame dimensions shown for reduced port tile "R" version.



Fuel gas can be increased to match the cold air capacity with no change to burner components however, fuel oil fl ow is limited as shown in the table above. 
Consult North American for special atomizer options.

 6821-10-A54 

6821-10-A54R  

40 000 

67 000 

5654-4 

35 

6 000 

2

 6821-10-B54 

6821-10-B54R 

53 000 

89 000 

5654-4 

35 

6 000 

2

 6821-12-54 

6821-12-54R 

78 000 

130 000 

5654-5 

60 

10 700 

3

 6821-14-54 

6821-14-54R  

106 000 

177 500 

5654-6  

100 

19 700 

10 

4

 

 6821-16-54 

6821-16-54R  

134 000 

225 000 

5654-6  

100 

19 700 

13 

4

 6821-18-54 

6821-18-54R  

172 000 

288 000 

5654-7 

200 

29 000 

16 

5

 6821-20-54  

6821-20-54R 

 215 000 

360 000 

5654-7 

200 

29 000 

17 

5

 6821-22-54 

6821-22-54R  

260 000 

435 500 

5654-7 

200 

29 000 

20 

5

COMBUSTION AIR CAPACITY, scfh (for Btu/hr capacity, multiply scfh by 100)

 

Burner 

 

 

 

Max. Oil 

Atomizing Air,  

Flame Dimensions

 

 

Designation 

1000 F Air 

60 F Air

 

 Atomizer  Capacity

 

  scfh not burning 

at 1000 F air

 

 

Standard Tile  Reduced Port Tile  at 10"wc

 

P at 

10"wc

 

P  Designation 

(gph) 

with 28 osi air 

Length  Diameter

Bulletin 6821

Page 3

DIMENSIONS in inches

T

 - Diameter

½

1" NPT for 
fl ame detector 
45º to mtg fl ange

C

 - NPT atomizer air inlet

D

 - NPT oil inlet

 

¼ NPT atomizing 

air taps

BB

 - Obsrv. port

 

¼ NPT 

fuel tap

Z

Y

X

2.50

 ¼ NPT 

air tap

E

 - Hole on a 

- Bolt circle

R

 - # of holes (straddle centerline)

A

 - Main air connection (ANSI)

.50 

mounting 

fl ange

CC

 - NPT pilot connection

FF

 - Clearance reqd. to remove atomizer

AA

1" NPT obsrv. port 
connections

DD

 - Minimum 

tile length

DD

 dia

EE

 dia

3° taper, standard 

tile only



B

 - 150 ANSI raised fl ange gas inlet

K

 - Diameter

F

 - Hole on a 

J

 - Bolt circle

G

 - # of holes

H °

- Hole on a   

- Bolt circle   

- # of 

holes

 

Q

 - Diameter

 GG

 - Diameter lining

HH

R tile only exit dia

U

W

V

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

.

Capacity, Dimensions | 6821 Magna-Flame

Catalog Combustion 2021 - Page 0814

Fives Group
FIVES GROUP
FIVES GROUP-FIVES GROUP-0814-0818

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