North American 4/5/6131 Service Manual Gas Port Information Natural Gas and Light Oil
Sheet 6131SML-7-1
4/5/6131 SERIES BURNERS
Method for closing off gas ports in Figure 4 is not identical to Figures 1, 2, and 3
Pipe Plug
Rectangular SST Cover
Forward Gas Ports
9 10
Radial Gas Ports
Rectangular SST Cover
8 9
8
11
7 8
7
10
6
9
6
7
5
Radial Gas Ports
7
6
4
5
Round SST Cover
5
Position No.
6
1
3
1
4
1
2
Forward Gas Ports
4
1
3 2
2
5
3 2
4 3
Figure 1.
Figure 2.
Figure 3.
Figure 4.
Application Table
Burner frame
Furnace pressure
Porting Arrangement
Forward Ports
Radial Ports
4/5/6131
Figure
closed
closed
A
P
1
All
None
A
N
1
All
6
N & P
B
1
2, 4, 6
2, 4, 6
1, 5, 7 tubes
N & P
C
2
2 & 3
2, 3, 4, 6, 8, 9
N & P
D
3
2 & 3
2 & 3
E, FA, FC (Gas) E, FA, FC (#2 Oil) E, FA, FC
P
4
3 & 4
3 & 4
N & P
N
4
1, 3, 4, 6,
1, 3, 4, 6 7, 9, 10
(Gas)
7, 9, 10
CS
P
2
2, 3, 7, 8
2, 3, 5, 7, 8
1, 4, 5, 6, 9 Orifice Plugs
Furnace Pressure — P = Positive, N = Neutral or Negative
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.
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