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MANIFOLDPRESSUREAND ORIFICESIZE FORHIGHALTITUDEAPPLICATIONS
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NATURAL GAS MANIFOLD PRESSURE (" w.c.)
..............................................................FOR THE 50,000, 75,000, 100,000 and 125,000 BTUH MODELS
MEAN ELEVATION FEET ABOVE SEA LEVEL
HEATING
0 to 2001 to 3001 to 4001 to 5001 to 6001 to 7001 to
VALUE
2000 3000 4000 5000 6000 7000 8000
at ALTITUDE
BTU/CU. FT, Orifice Manifold Orifice Manifold Orifice Manifold Orifice Manifold Orifice Manifold Orifice Manifold Orifice Manifold
No. Pressure No. Pressure No. Pressure No. Pressure No. Pressure No. Pressure No. Pressure
700 41 3.7
725 41 3.7 41 3.4
750 41 3.5 42 3.6
775 41 3.6 42 3.6 42 3.3
800 41 3.6 42 3,7 42 3,4 42 3.1
825 41 3.7 41 3.4 42 3.5 42 3.2 42 2.9
850 41 3.5 42 3.6 42 3,3 42 3,0 42 2.8
875 41 3.6 42 3.6 42 3.4 42 3.1 42 2.8 42 2.6
900 42 3,7 42 3,4 42 3.2 42 2.9 42 2,7 42 2.5
925 41 3.7 42 3,5 42 3,3 42 3.0 42 2,8 42 2,5 42 2.3
950 41 3.5 42 3.3 42 3.1 42 2.9 42 2,6 42 2.4 43 2.7
975 42 3.7 42 3,2 42 2,9 42 2.7 42 2,5 42 2,3 43 2.6
1000 42 3.5 42 3.0 42 2.8 42 2.6 42 2.4 43 2.7 43 2.4
1050 42 3.2 42 2.7 42 2,5 42 2.3 43 2.6
1100 42 2.9 42 2.5 42 2.3 43 2.6
NOTE: Natural gas data is based on 0.60 specific gravity. For fuels with different specific gravity consult the National Fuel Gas Code ANSI
Z223.1-2002/NFPA 54-2002 or National Standard of Canada, Natural Gas And Propane Installation Code CSA B149.1-00.
Ta_i CPG or PROPANE GAS MANIFOLD PRESSURE (" w.c.)
................................................................................................................FOR THE 50,000, 75,000, 100,000 and 125,000 BTUH MODELS
HEATING VALUE MEAN ELEVATION FEET ABOVE SEA LEVEL
at ALTITUDE 0 to 2001 to 3001 to 4001 to 5001 to 6001 to 7001 to
BTU/CU, FT. 2000 3000 4000 5000 6000 7000 8000
2500 10.0 10.0 9.0 10.0 9.4 8.5 10.0
Orifice Size #54 #54 #54 #55 #55 #55
NOTE: Propane data isbased on 1.53 specific gravity. For fuels with different specific gravity consult the National Fuel Gas Code ANSI Z223.1-2002/N FPA
54-2002 or National Standard Of Canada, Natural Gas And Propane Installation Code CSA B149.1-00.
NATURAL GAS MANIFOLD PRESSURE (" w.c.)
..............................................................FOR THE 80,000 BTUH MODELS
MEAN ELEVATION FEET ABOVE SEA LEVEL
HEATING
0 to 2001 to 3001 to 4001 to 5001 to 6001 to 7001 to
VALUE
2000 3000 4000 5000 6000 7000 8000
at ALTITUDE
BTU/CU. FT. Orifice Manifold Orifice Manifold Orifice Manifold Orifice Manifold Orifice Manifold Orifice Manifold Orifice Manifold
No. Pressure No. Pressure No. Pressure No. Pressure No. Pressure No. Pressure No. Pressure
700 44 3.7
725 44 3.7 44 3.4
750 44 3,5 44 3.2
775 44 3.5 44 3.2 44 3.0
800 44 3.6 44 3.3 44 3.0 44 2.8
825 44 3,7 44 3.4 44 3,1 44 2,9 44 2.6
850 44 3.5 44 3.2 44 2,9 44 2.7 44 2.5
875 44 3,5 44 3,3 44 3.0 44 2.8 44 2,5 44 2.3
900 44 3.3 44 3.1 44 2.8 44 2.6 44 2.4 45 2.7
925 44 3.7 44 3,2 44 2,9 44 2.7 44 2.5 44 2,3 45 2.5
950 44 3.5 44 3,0 44 2,8 44 2.6 44 2,4 45 2.6 45 2.4
975 44 3.3 44 2,8 44 2.6 44 2.4 45 2.7 45 2.5 45 2.3
1000 44 3.2 44 2,7 44 2,5 44 2.3 45 2.6 45 2.4 46 2.3
1050 44 2.9 44 2.5 44 2.3 45 2.5 45 2.3
1100 44 2.6 45 2.7 45 2.5 45 2.3
NOTE: Natural gas data is based on 0.60 specific gravity. For fuels with different specific gravity consult the National Fuel Gas Code ANSI
Z223.1-2002/NFPA 54-2002 or National Standard of Canada, Natural Gas And Propane Installation Code CSA B149.1-00.
44001102004