SERVICE AND TECHNICAL SUPPORT MANUAL
Table 3 (CONT.) Orifice Size and Manifold Pressure (in. w.c.) for Gas Input Rate − 26,000 BTUH Single Stage
(TABULATED DATA BASED ON 13,000 BTUH PER BURNER, DERATED 2%/1000 FT (305M) ABOVE SEA LEVEL
7001
(2134)
8000
(2438)
8001
(2439)
9000
(2743)
9001
(2744)
10000
(3048)
* Orifice numbers shown in BOLD are factory-installed.
440 04 4402 06
ORIFICE SIZE* AND MANIFOLD PRESSURE (IN WC) FOR GAS INPUT RATE
43
1.7
650
675
44
1.8
700
44
1.7
725
44
1.6
to
750
44
1.5
775
44
1.4
800
44
1.3
825
44
1.2
625
43
1.7
650
44
1.8
675
44
1.7
700
44
1.6
to
725
44
1.5
750
44
1.4
775
44
1.3
600
43
1.7
625
44
1.8
650
44
1.7
to
675
44
1.6
700
44
1.4
725
44
1.3
Specifications subject to change without notice.
43
1.8
42
1.5
43
1.7
43
1.7
44
1.8
44
1.8
44
1.7
44
1.7
44
1.5
44
1.6
44
1.4
44
1.5
44
1.4
44
1.4
44
1.3
44
1.3
43
1.8
43
1.8
43
1.7
43
1.7
44
1.8
44
1.8
44
1.6
44
1.7
44
1.5
44
1.6
44
1.4
44
1.5
44
1.3
44
1.4
43
1.8
43
1.8
43
1.6
43
1.7
44
1.7
44
1.8
44
1.6
44
1.7
44
1.5
44
1.5
44
1.4
44
1.4
Gas Furnace: N9MSE
42
1.6
43
1.8
43
1.7
44
1.8
44
1.6
44
1.5
44
1.4
44
1.4
42
1.6
43
1.8
43
1.6
44
1.7
44
1.6
44
1.5
44
1.4
42
1.6
43
1.7
44
1.8
44
1.7
44
1.6
44
1.5
A150572
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