Installation Guide

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Table7.HighAltitudeDerationChartforPropaneGas
pROpANE DERATION CHART
ALTITUDE ABOVE
SEA LEVEL
INPUT(BTU)
45,000 54,000 72,000 90,000 108,000 126,000
0to1,999FT
57 56 56 56 56 56 ORIFICE SIZE
10.0 10.0 10.0 10.0 10.0 10.0 MANIFOLD PRESSURE
2,000to2,999FT
57 56 56 56 56 56 ORIFICE SIZE
9.0 9.0 9.0 9.0 9.0 9.0 MANIFOLD PRESSURE
3,000to4,999FT
57 56 56 56 56 56 ORIFICE SIZE
8.5 8.5 8.5 8.5 8.5 8.5 MANIFOLD PRESSURE
5,000to5,999FT
59 57 57 57 57 57 ORIFICE SIZE
10.0 10.0 10.0 10.0 10.0 10.0 MANIFOLD PRESSURE
6,000to7,999FT
59 57 57 57 57 57 ORIFICE SIZE
9.0 9.0 9.0 9.0 9.0 9.0 MANIFOLD PRESSURE
8,000to10,000FT
59 57 57 57 57 57 ORIFICE SIZE
8.5 8.5 8.5 8.5 8.5 8.5 MANIFOLD PRESSURE
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
5,000 FT LOW LOW LOW LOW LOW
HIGH HIGH HIGH HIGH
6,000 FT LOW LOW LOW LOW
HIGH HIGH HIGH HIGH HIGH
7,000 FT LOW LOW LOW LOW
HIGH HIGH HIGH HIGH HIGH
8,000 FT LOW LOW LOW
HIGH HIGH HIGH HIGH HIGH HIGH
9,000 FT LOW LOW LOW
HIGH HIGH HIGH HIGH HIGH HIGH
10,000 FT LOW LOW
HIGH HIGH HIGH HIGH HIGH HIGH HIGH
Table8.NaturalGasHeatingValues