Carrier 100/A Series Installation, Start-Up, Operating And Service And Maintenance Instructions page 41

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Table 13 - Orifice Size* and Manifold Pressure (In. wc) for Gas Input Rate
(TABULATED DATA BASED ON 22,000 BTUH PER BURNER, DERATED 4%11000 FT (305M) ABOVE SEA LEVEL)
ALTITUDE AVG. GAS SPECIFIC GRAVITY OF NATURAL GAS
RANGE HEAT VALUE 0.58 0.60 0.62 0.64
AT ALTITUDE Orifice Manifold Orifice Manifold Orifice Manifold Orifice Manifold
ft (m) IBtu/cu ft_ No. Pressure No. Pressure No. Pressure No. Pressure
900 42 3.5 42 3,6 42 3.7 41 3.5
0 925 42 3.3 42 3,4 42 3.5 42 3.7
(0) 950 43 3.8 42 3,3 42 3.4 42 3.5
975 43 3.6 43 3.8 42 3.2 42 3.3
to 1000 43 3.5 43 3.6 43 3.7 43 3.8
1025 43 3.3 43 3.4 43 3.5 43 3.6
2000 1050 44 3.6 43 3.2 43 3.4 43 3.5
(610) 1075 44 3.4 44 3.5 43 3.2 43 3.3
1100 44 3.3 44 3.4 44 3.5 43 3.2
U.S.A. 800 42 3.4 42 3.5 42 3.6 42 3.7
2001 (611) 825 42 3.2 42 3.3 42 3.4 42 3.5
to 850 43 3.7 43 3.8 42 3.2 42 3.3
3000 (914) 875 43 3.5 43 3.6 43 3.7 43 3.8
900 43 3.3 43 3.4 43 3.5 43 3.6
Canada 925 43 3.1 43 3.2 43 3.3 43 3.4
2001 (611) 950 43 2.9 43 3.0 43 3.1 43 3.2
to 975 43 2.8 43 2.9 43 3.0 43 3.1
4500 11372} 1000 43 2.6 43 2.7 43 2.8 43 2.9
/ /
775 42 3.2 42 3.3 42 3.4 42 3.5
3001 800 43 3.6 43 3,8 42 3.2 42 3.3
(915) 825 43 3.4 43 3.5 43 3.7 43 3.8
850 43 3.2 43 3.3 43 3.4 43 3.6
to
875 43 3.0 43 3.1 43 3.3 43 3.4
4000 900 43 2.9 43 3,0 43 3.1 43 3.2
(1219) 925 43 2.7 43 2.8 43 2.9 43 3.0
950 43 2.6 43 2.7 43 2.8 43 2.8
750 43 3.6 43 3.8 42 3.2 42 3.3
4001 775 43 3.4 43 3,5 43 3.6 43 3.8
(1220) 800 43 3.2 43 3.3 43 3.4 43 3,5
825 43 3.0 43 3.1 43 3.2 43 3.3
to
850 43 2.8 43 2.9 43 3.0 43 3.1
5000 875 43 2.7 43 2.8 43 2.9 43 2.9
(1524) 900 43 2.5 43 2.6 43 2.7 43 2.8
925 43 2.4 43 2.5 43 2.6 43 2.6
725 43 3.4 43 3.5 43 3.6 43 3.7
5001 750 43 3.2 43 3.3 43 3.4 43 3.5
(1525) 775 43 3.0 43 3.1 43 3.2 43 3.3
800 43 2.8 43 2.9 43 3.0 43 3.1
to
825 43 2.6 43 2.7 43 2.8 43 2.9
6000 850 43 2.5 43 2.5 43 2.6 43 2.7
(1829) 875 43 2.3 43 2.4 43 2.5 43 2.6
900 43 2.2 43 2.3 43 2.3 43 2.4
675 43 3.4 43 3.5 43 3.6 43 3.7
6001 700 43 3.1 43 3.3 43 3.4 43 3.5
(1830) 725 43 2.9 43 3.0 43 3.1 43 3.2
750 43 2.7 43 2.8 43 2.9 43 3.0
to
775 43 2.6 43 2.7 43 2.7 43 2.8
7000 800 43 2.4 43 2.5 43 2.6 43 2.7
(2133) 825 43 2.3 43 2.3 43 2.4 43 2.5
850 43 2.1 43 2.2 43 2.3 43 2.4
A08220
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