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Table 13. High Altitude Deration - Natural Gas With High Heating Value - Nordyne TC Series User Manual

Two-stage condensing gas furnaces with fixed & variable speed blowers
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HIGH ALTITUDE DERATION – NATURAL GAS WITH HIGH HEATING VALUE
ALTITUDE ABOVE
SEA LEVEL
1st
0 to 1,999 FT
1.7
2,000 to 2,999 FT
1.7
3,000 to 3,999 FT
1.7
4,000 to 4,999 FT
1.7
5,000 to 5,999 FT
1.7
6,000 to 6,999 FT
1.7
7,000 to 7,999 FT
1.7
8,000 to 8,999 FT
1.7
9,000 to 9,999 FT
1.7

Table 13. High Altitude Deration - Natural Gas with HIGH Heating Value

HIGH ALTITUDE DERATION – NATURAL GAS WITH LOW HEATING VALUE)
ALTITUDE ABOVE SEA
LEVEL
1st
0 to 1,999 FT
1.7
2,000 to 2,999 FT
1.7
3,000 to 3,999 FT
1.7
4,000 to 4,999 FT
1.7
5,000 to 5,999 FT
1.7
6,000 to 6,999 FT
1.7
7,000 to 7,999 FT
1.7
8,000 to 8,999 FT
1.7
9,000 to 9,999 FT
1.7
Table 14. High Altitude Deration - Natural Gas with LOW Heating Value
38
INPUT (BTU) & STAGE
60,000
80,000
2nd
1st
2nd
45
45
3.5
1.7
3.5
45
45
3.3
1.7
3.3
45
45
3.1
1.7
3.1
45
45
2.9
1.7
2.9
45
45
2.8
1.7
2.8
48
48
3.5
1.7
3.5
48
48
3.3
1.7
3.3
48
48
3.0
1.7
3.0
48
48
2.8
1.7
2.8
INPUT (BTU) & STAGE
60,000
80,000
2nd
1st
2nd
45
45
3.5
1.7
3.5
45
45
3.5
1.7
3.5
45
45
3.4
1.7
3.4
45
45
3.2
1.7
3.2
45
45
3.1
1.7
3.1
45
45
2.9
1.7
2.9
48
48
3.5
1.7
3.5
48
48
3.3
1.7
3.3
48
48
3.1
1.7
3.1
100,000
120,000
1st
2nd
1st
45
45
1.7
3.5
1.7
45
45
1.7
3.3
1.7
45
45
1.7
3.1
1.7
45
45
1.7
2.9
1.7
45
45
1.7
2.8
1.7
48
48
1.7
3.5
1.7
48
48
1.7
3.3
1.7
48
48
1.7
3.0
1.7
48
48
1.7
2.8
1.7
100,000
120,000
1st
2nd
1st
45
45
1.7
3.5
1.7
45
45
1.7
3.5
1.7
45
45
1.7
3.4
1.7
45
45
1.7
3.2
1.7
45
45
1.7
3.1
1.7
45
45
1.7
2.9
1.7
48
48
1.7
3.5
1.7
48
48
1.7
3.3
1.7
48
48
1.7
3.1
1.7
2nd
ORIFICE SIZE
3.5
MANIFOLD PRESSURE
ORIFICE SIZE
3.3
MANIFOLD PRESSURE
ORIFICE SIZE
3.1
MANIFOLD PRESSURE
ORIFICE SIZE
2.9
MANIFOLD PRESSURE
ORIFICE SIZE
2.8
MANIFOLD PRESSURE
ORIFICE SIZE
3.5
MANIFOLD PRESSURE
ORIFICE SIZE
3.3
MANIFOLD PRESSURE
ORIFICE SIZE
3.0
MANIFOLD PRESSURE
ORIFICE SIZE
2.8
MANIFOLD PRESSURE
2nd
ORIFICE SIZE
3.5
MANIFOLD PRESSURE
ORIFICE SIZE
3.5
MANIFOLD PRESSURE
ORIFICE SIZE
3.4
MANIFOLD PRESSURE
ORIFICE SIZE
3.2
MANIFOLD PRESSURE
ORIFICE SIZE
3.1
MANIFOLD PRESSURE
ORIFICE SIZE
2.9
MANIFOLD PRESSURE
ORIFICE SIZE
3.5
MANIFOLD PRESSURE
ORIFICE SIZE
3.3
MANIFOLD PRESSURE
ORIFICE SIZE
3.1
MANIFOLD PRESSURE

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