MG3P Installation Manual

48
ALTITUDE
ABOVE
SEA LEVEL
LOCAL HEATING VALUE, 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 16. Natural Gas Heating Values
Table 17. High Altitude Deration Chart for
Natural Gas - High Heating Value
NATURAL GAS - HIGH HEATING VALUE
ALTITUDE
ABOVE
SEA LEVEL
INPUT (BTU)
54,000 90,000
0 to
1,999 FT
47 47
Orifice Size
3.5 3.5
Manifold Pressure
2,000 to
2,999 FT
47 47
Orifice Size
3.2 3.2
Manifold Pressure
3,000 to
3,999 FT
47 47
Orifice Size
3.0 3.0
Manifold Pressure
4,000 to
4,999 FT
47 47
Orifice Size
2.8 2.8
Manifold Pressure
5,000 to
5,999 FT
47 47
Orifice Size
2.7 2.7
Manifold Pressure
6,000 to
6,999 FT
49 49
Orifice Size
3.5 3.5
Manifold Pressure
7,000 to
7,999 FT
49 49
Orifice Size
3.3 3.3
Manifold Pressure
8,000 to
8,999 FT
49 49
Orifice Size
3.0 3.0
Manifold Pressure
9,000 to
9,999 FT
49 49
Orifice Size
2.8 2.8
Manifold Pressure
Table 18. High Altitude Deration Chart for
Natural Gas - Low Heating Value
NATURAL GAS - LOW HEATING VALUE
ALTITUDE
ABOVE
SEA LEVEL
INPUT (BTU)
54,000 90,000
0 to
1,999 FT
47 47
Orifice Size
3.5 3.5
Manifold Pressure
2,000 to
2,999 FT
47 47
Orifice Size
3.5 3.5
Manifold Pressure
3,000 to
3,999 FT
47 47
Orifice Size
3.3 3.3
Manifold Pressure
4,000 to
4,999 FT
47 47
Orifice Size
3.1 3.1
Manifold Pressure
5,000 to
5,999 FT
47 47
Orifice Size
2.9 2.9
Manifold Pressure
6,000 to
6,999 FT
47 47
Orifice Size
2.8 2.8
Manifold Pressure
7,000 to
7,999 FT
49 49
Orifice Size
3.4 3.4
Manifold Pressure
8,000 to
8,999 FT
49 49
Orifice Size
3.2 3.2
Manifold Pressure
9,000 to
9,999 FT
49 49
Orifice Size
2.9 2.9
Manifold Pressure
PROPANE GAS
ALTITUDE
ABOVE
SEA LEVEL
INPUT (BTU)
54,000 90,000
0 to
1,999 FT
56 56
Orifice Size
10.0 10.0
Manifold Pressure
2,000 to
2,999 FT
56 56
Orifice Size
9.0 9.0
Manifold Pressure
3,000 to
4,999 FT
56 56
Orifice Size
8.5 8.5
Manifold Pressure
5,000 to
5,999 FT
57 57
Orifice Size
10.0 10.0
Manifold Pressure
6,000 to
7,999 FT
57 57
Orifice Size
9.0 9.0
Manifold Pressure
8,000 to
10,000 FT
57 57
Orifice Size
8.5 8.5
Manifold Pressure
Table 19. High Altitude Deration Chart
for Propane Gas