International comfort products H8UH5050B12C2 Installation Instructions Manual page 24

MANIFOLD PRESSURE AND ORIFICE SIZE FOR HIGH ALTITUDE APPLICATIONS
NATURAL GAS MANIFOLD PRESSURE (in wc) For Models 050 thru 125
Table 5
HEATING 0 to
VALUE 2000
at ALTITUDE
Orifice Manifold
No. Pressure
BTU/CU. FT.
700 ---- ----
725 ---- ----
750 ---- ----
775 ---- ----
800 ---- ----
825 ---- ----
850 ---- ----
875 ---- ----
900 ---- ----
925 41 3.7
950 41 3.5
975 42 3.7
1000 42 3.5
1050 42 3.2
1100 43 3.6
Conversion: 1 in wc = .25 kPa
NOTE: Natural gas data is based on 0.60 specific gravity.
ANSI Z223.1--2006/NFPA 54--2006 or National Standard of Canada, Natural Gas And Propane Installation Code CSA B149.1--05.
Table 6
HEATING VALUE
at ALTITUDE
BTU/CU. FT.
2500
Orifice Size
Conversion: 1 in wc = .25 kPa
NOTE: Propane data is based on 1.53 specific gravity. For fuels with different specific gravity consult the National Fuel Gas Code ANSI Z223.1--2006/NFPA
54--2006 or National Standard Of Canada, Natural Gas And Propane Installation Code CSA B149.1--05.
NATURAL GAS MANIFOLD PRESSURE (in wc) For Models 140
Table 7
HEATING 0 to
VALUE 2000
at ALTITUDE
Orifice Manifold
No. Pressure
BTU/CU. FT.
700 ---- ----
725 ---- ----
750 ---- ----
775 ---- ----
800 ---- ----
825 ---- ----
850 ---- ----
875 ---- ----
900 ---- ----
925 42 3.6
950 42 3.4
975 42 3.2
1000 42 3.1
1050 43 3.4
1100 44 3.6
Conversion: 1 in wc = .25 kPa
NOTE: Natural gas data is based on 0.60 specific gravity.
ANSI Z223.1--2006/NFPA 54--2006 or National Standard of Canada, Natural Gas And Propane Installation Code CSA B149.1--05.
24
MEAN ELEVATION FEET ABOVE SEA LEVEL
2001 to 3001 to
3000 4000
Orifice Manifold Orifice
No. Pressure No. Pressure
---- ---- ----
---- ---- ----
---- ---- ----
---- ---- ----
---- ---- ----
---- ---- 41
---- ---- 41
41 3.6 42
42 3.7 42
42 3.5 42
42 3.3 42
42 3.2 42
42 3.0 42
42 2.7 42
42 2.5 44
PROPANE GAS MANIFOLD PRESSURE (in wc) For Models 050 thru 125
0 to 2001 to
2000 3000
10.0 10.0
#54 #54
MEAN ELEVATION FEET ABOVE SEA LEVEL
2001 to 3001 to
3000 4000
Orifice Manifold Orifice
No. Pressure No.
---- ---- ----
---- ---- ----
---- ---- ----
---- ---- ----
---- ---- ----
---- ---- 42
---- ---- 42
42 3.4 42
42 3.2 42
42 3.1 42
42 2.9 42
42 2.8 42
42 2.6 42
42 2.4 45
45 3.7 46
Specifications are subject to change without notice
4001 to
5000
Manifold Orifice Manifold Orifice
No. Pressure No.
---- ---- ---- ----
---- ---- ---- ----
---- ---- ---- ----
---- ---- ---- 41
---- 41 3.6 42
3.7 41 3.4 42
3.5 42 3.6 42
3.6 42 3.4 42
3.4 42 3.2 42
3.3 42 3.0 42
3.1 42 2.9 42
2.9 42 2.7 42
2.8 42 2.6 42
2.5 44 3.3 45
3.2 45 3.6 ----
For fuels with different specific gravity consult the National Fuel Gas Code
MEAN ELEVATION FEET ABOVE SEA LEVEL
3001 to 4001 to
4000 5000
9.0 10.0
#54 #55
4001 to
5000
Manifold Orifice Manifold Orifice
Pressure No. Pressure
---- ---- ----
---- ---- ----
---- ---- ----
---- ---- ----
---- 42 3.5
3.6 42 3.3
3.4 42 3.1
3.2 42 2.9
3.0 42 2.8
2.8 42 2.6
2.7 42 2.5
2.6 42 2.4
2.4 44 3.1
3.7 46 3.6
3.6 47 3.7
For fuels with different specific gravity consult the National Fuel Gas Code
5001 to 6001 to
6000 7000
Manifold Orifice Manifold
Pressure No. Pressure
---- ---- ----
---- 41 3.7
---- 41 3.5
3.6 42 3.6
3.7 42 3.4
3.5 42 3.2
3.3 42 3.0
3.1 42 2.8
2.9 42 2.7
2.8 42 2.5
2.6 42 2.4
2.5 44 3.2
2.4 45 3.7
3.6 ---- ----
---- ---- ----
5001 to 6001 to
6000 7000
9.4 8.5
#55 #55
5001 to 6001 to
6000 7000
Manifold Orifice Manifold
No. Pressure No. Pressure
---- ---- ---- ----
---- ---- 42 3.6
---- ---- 42 3.4
42 3.4 42 3.2
42 3.2 42 3.0
42 3.0 42 2.8
42 2.8 42 2.6
42 2.7 42 2.5
42 2.6 44 3.3
42 2.4 44 3.1
44 3.2 45 3.6
45 3.7 46 3.5
46 3.7 46 3.4
46 3.3 ---- ----
---- ---- ---- ----
7001 to
8000
Orifice Manifold
No. Pressure
41 3.7
41 3.4
42 3.6
42 3.3
42 3.1
42 2.9
42 2.8
42 2.6
42 2.5
44 3.3
44 3.1
45 3.6
45 3.4
---- ----
---- ----
7001 to
8000
10.0
#56
7001 to
8000
Orifice Manifold
No. Pressure
42 3.6
42 3.3
42 3.1
42 2.9
42 2.7
42 2.6
42 2.4
44 3.2
45 3.6
46 3.6
46 3.4
47 3.7
47 3.5
---- ----
---- ----
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