General Information
Table A: Basic Data
Table B: Manifold Data
Model
No.
Quantity of
Vent Size (in.)
Burners Gas Valves Blowers Flue
Intake
399B
8
1
1
6
6
499B
10
2
1
6
6
649B
13
2
1
8
6
749B
15
2
1
8
6
899B
18
3
1
8
6
989B
11
2
2
10
10
1259B
14
3
2
12
10
1529B
17
4
2
12
10
1799B
20
4
2
14
10
1999B
23
5
3
14
10
2069B
23
5
3
14
10
2339B
26
5
3
16
10
Model
No.
Burners per Valve
Stages
% Fire at Stage
1
1A
2
3
4
1
2
3
4
1
2
3
4
399B
8
1
100
499B
5
5
1
1, 2
50
100
649B
7
6
1
1, 2
54
100
749B
8
7
1
1, 2
53
100
899B
6
6
6
1, 2
1, 2, 3
66
100
989B
6
5
1
1, 2
54
100
1259B
5
3
6
1
1, 2
1, 2, 3
36
57
100
1529B
6
4
4
3
1
1, 2
1, 2, 3
1, 2, 3, 4
35
59
82
100
1799B
6
4
5
5
1
1, 2
1, 2, 3
1, 2, 3, 4
30
50
75
100
1999B
4
5
5
5
4
1, 1A 1, 1A, 2 1, 1A, 2, 3 1, 1A, 2, 3, 4 39
61
83
100
2069B
4
5
5
5
4
1, 1A 1, 1A, 2 1, 1A, 2, 3 1, 1A, 2, 3, 4 39
61
83
100
2339B
5
6
5
5
5
1, 1A 1, 1A, 2 1, 1A, 2, 3 1, 1A, 2, 3, 4 42
62
81
100
7
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