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