North American 4/5/6131 Service Manual 

Gas Port Information Natural Gas and Heavy Oil

Sheet 6131SMH-7-1

Method for closing off gas ports in
Figure 4 is not identical to Figures 1, 2, 
and 3

Application Table

 

Burner  

Furnace  

 

Porting Arrangement

 

frame  

pressure  

 

Forward Ports  

Radial Ports

 4/5/6131 

 



  

Figure 

closed  

closed

 

A N 

&

 P 

1 

All 

1, 2, 3

 
 B 

N 

&

 P 

1 

2, 4, 6 

2, 4, 6

 
 

   1, 

5, 

7

 C 

N 

&

 P 

2 

tubes 

2 & 3

 

 

 

 

2, 3, 4, 6, 8, 9

 

CL 

N 

3 

2, 3, 5, 6, 8,9 

2, 3, 5, 6, 8, 9

 

CL 

P 

3 

2 & 3 

2 

&

 3

 D 

N

 D 

P 

3 

All 

2 

&

 3

 

E, FA, FC 

N 

&

 P 

4 

1, 3, 4, 6, 7, 9, 10 

1, 3, 4, 6, 7, 9, 10

 



 Furnace Pressure — P = Positive, N = Neutral or Negative

4/5/6131 SERIES BURNERS

Forward

Gas Ports

Radial

Gas Ports

Rectangular

SST Cover

Position

No.

Radial

Gas Ports

Forward Gas
    Ports

Figure 1.

Figure 2.

Figure 3.

Figure 4.

1

2

3

4

5

6

7

1

9

2

3

4

5

6

7

8

1

2

3

4

5

6

7

8

9

10

1

2

3

4

5

6

7

8

9

10

11

Rectangular

SST Cover

Round SST Cover

Pipe Plug

ENERG

Y | C

OMBUSITION