Table 13 - Orifice Size* and Manifold Pressure (In. wc) for Gas Input Rate (CONT)
(TABULATED DATA BASED ON 22,000 BTUH PER BURNER, DERATED 4%/1000 FT (305M) ABOVE SEA LEVEL)
ALTITUDE AVG. GAS SPECIFIC GRAVITY OF NATURAL GAS
RANGE HEAT VALUE 0.58 0.60 0.62 0.64
ft (m)
AT ALTITUDE Orifice Manifold Orifice Manifold Orifice Manifold Orifice Manifold
IBtu/cu ft I No. Pressure No. Pressure No. Pressure No. Pressure
/ /
650 43 3.1 43 3.2 43 3.4 43 3.5
7001 675 43 2.9 43 3.0 43 3.1 43 3.2
--_ (2134) 700 43 2.7 43 2.8 43 2.9 43 3.0
C
O 725 43 2.5 43 2.6 43 2.7 43 2.8
to
750 43 2.4 43 2.4 43 2.5 43 2.6
8000 775 43 2.2 43 2.3 43 2.4 43 2.4
(2438)
800 43 2.1 43 2.1 43 2.2 43 2.3
825 48 3.7 43 2.0 43 2.1 43 2.2
625 43 2.9 43 3.0 43 3.1 43 3.2
g ___ 8001 650 43 2.7 43 2.8 43 2.9 43 3.0
" (2439) 675 43 2.5 43 2.6 43 2.7 43 2.8
0
to 700 43 2.3 43 2.4 43 2.5 43 2.6
725 43 2.2 43 2.2 43 2.3 43 2.4
9000 750 43 2.0 43 2.1 43 2.2 43 2.2
c-
O
12743) 775 48 3.6 48 3.7 43 2.0 43 2.1
/ /
9001 600 43 2.7 43 2.8 43 2.9 43 3.0
(2744) 625 43 2.5 43 2.6 43 2.6 43 2.7
650 43 2.3 43 2.4 43 2.4 43 2,5
to
675 43 2.1 43 2.2 43 2.3 43 2.3
10000 700 48 3.7 43 2.0 43 2.1 43 2.2
130481 725 48 3.5
* Orifice numbers shown in BOLD are factory-installed.
48 3.6 48 3.7 43 2.0
A08220A
42
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