7
General Information
Quantity of
Vent Size
(in.)
Model
No.
Burners
Gas
Valves
Blowers Flue Intake
302A
6
1
1
5
6
402A
8
1
1
6
6
502A
10
2
1
6
6
652A
13
2
1
8
6
752A
15
2
1
8
6
902A
18
3
1
8
6
# Burners per
Valve
Stages
% Fire at
Stage
Model
No.
1
2
3
1
2
1
2
302A
6
1
100
402A
8
1
100
502A
5
5
1
1, 2
50
100
652A
7
6
1
1,2
54
100
752A
8
7
1
1,2
53
100
902A
6
6
6
1, 1A 1, 1A, 2 66
100
Table A: Basic Data
Table B: Manifold Data
# Burners
per Valve
Valve
Staging
% Firing
at Stage
Model
No.
1
2*
1
2
1
2
302A
4
2
1
1, 2
66
100
402A
5
3
1
1, 2
63
100
Table C: 2-Stage Design Option
* Valve 2 is inside the air plenum on H3/WH3 302A-402A
