J801X Installation Manual

27
LOCAL HEATING VALUES FOR NATURAL GAS
ALTITUDE ABOVE
SEA LEVEL
BTU PER CUBIC FOOT
650 700 750 800 850 900 950 1,000 1,050
2,000 FT LOW LOW LOW LOW LOW LOW
HIGH HIGH HIGH
3,000 FT LOW LOW LOW LOW LOW LOW
HIGH HIGH HIGH
4,000 FT LOW LOW LOW LOW LOW
HIGH HIGH HIGH HIGH
4,999 FT LOW LOW LOW LOW LOW
HIGH HIGH HIGH HIGH
Table 8. Natural Gas Heating Values
NATURAL GAS W/ HIGH HEATING VALUE
ALTITUDE
ABOVE
SEA LEVEL
INPUT (BTU)
55,000 70,000 100,000
0 to 1,999 FT
3.4 mm 26 16 ORIFICE SIZE
3.5 3.5 3.3 MANIFOLD PRESSURE
2,000 to 2,999 FT
3.4 mm ORIFICE SIZE
3.0 MANIFOLD PRESSURE
3,000 to 3,999 FT
ORIFICE SIZE
MANIFOLD PRESSURE
4,000 to 4,999 FT
ORIFICE SIZE
MANIFOLD PRESSURE
Table 9. High Altitude Deration Chart for Natural Gas - High Heating Value
Table 10. High Altitude Deration Chart for Natural Gas - Low Heating Value
NATURAL GAS W/ LOW HEATING VALUE
ALTITUDE ABOVE SEA
LEVEL
INPUT (BTU)
55,000 70,000 100,000
0 to 1,999 FT
3.4mm 26 16 ORIFICE SIZE
3.5 3.5 3.3 MANIFOLD PRESSURE
2,000 to 2,999 FT
3.4mm ORIFICE SIZE
3.0 MANIFOLD PRESSURE
3,000 to 3,999 FT
ORIFICE SIZE
MANIFOLD PRESSURE
4,000 to 4,999 FT
ORIFICE SIZE
MANIFOLD PRESSURE