ALLIANCE CA050L - High Altitude Burner Orifice Sizing

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Gas Requirements
70457901ENR7
42
High Altitude Burner Orifice Sizing
For proper operation at altitudes above 2000 feet
(610 m), the gas burner orifice size must be reduced to
ensure complete combustion. Refer to Table 6.
For CE models, consult local gas supplier.
Table 6
Model Gas
Altitude Burner Orifice New Rate
feet meters No. inches mm Quantity
Part
Number
Btu/hr.* Mj/hr.
050
Series
Natural Gas 2001-4000 610-1220 27 0.1440 3.7 2 M400998 119,600 126
4001-6000 1221-1830 28 0.1405 3.6 M401014 109,200 115
6001-8000 1831-2440 29 0.1360 3.4 M400997 98,800 104
8001-10,000 2441-3050 30 0.1285 3.3 M401021 88,400 93
L.P. Gas 2001-4000 610-1220 43 0.0890 2.3 M406184 119,600 126
4001-6000 1221-1830 44 0.0860 2.2 M401011 109,200 115
6001-8000 1831-2440 45 0.0820 2.1 M401027 98,800 104
8001-10,000 2441-3050 46 0.0810 2.1 M401003 88,400 93
075
Series
Natural Gas 2001-4000 610-1220 29 0.1360 3.4 3 M400997 151,800 160
4001-6000 1221-1830 30 0.1285 3.3 M401021 138,600 146
6001-8000 1831-2440 1/8 0.1250 3.2 M402489 125,400 132
8001-10,000 2441-3050 31 0.1200 3.0 M401017 112,200 118
L.P. Gas 2001-4000 610-1220 45 0.0820 2.1 M401027 165,000 174
4001-6000 1221-1830 47 0.0785 2.0 M400999 138,600 146
6001-8000 1831-2440 47 0.0785 2.0 M400999 125,400 132
8001-10,000 2441-3050 48 0.0760 1.9 M401001 112,200 118
F75
Series
Natural Gas 2001-4000 610-1220 22 0.1570 4.0 3 M402996 207,000 218
4001-6000 1221-1830 24 0.1520 3.9 M402980 189,000 199
6001-8000 1831-2440 26 0.1470 3.7 M401000 171,000 180
8001-10,000 2441-3050 28 0.1405 3.6 M401014 153,000 161
L.P. Gas 2001-4000 610-1220 41 0.0960 2.4 M401015 225,000 237
4001-6000 1221-1830 42 0.0935 2.4 M403017 189,000 199
6001-8000 1831-2440 43 0.0890 2.3 M406184 171,000 180
8001-10,000 2441-3050 44 0.0860 2.2 M401001 153,000 161
* Btu/hr. derate of 4% per 1000 feet (305 meters) of altitude.