Carrier 58CTW - Page 44

44
Table 12 -- Orifice Size and Manifold Pressure (In. W.C.) for Gas Input Rate (Con’t.)
(Tabulated Data Based on 22,000 Btuh High--Heat/14,500 Btuh for Low--Heat per Burner, Derated 4 Percent for Each 1000 Ft.
Above Sea Level)
ALTITUDE
RANGE
FT. (M)
AVG. GAS
HEAT VALUE
AT ALTITUDE
(BTUH/CU FT.)
SPECIFIC GRAVITY OF NATURAL GAS
0.58 0.60 0.62 0.64
Orifice
No.
Manifold
Pressure
High/Low
Orifice
No.
Manifold
Pressure
High/Low
Orifice
No.
Manifold
Pressure
High/Low
Orifice
No.
Manifold
Pressure
High/Low
USA
5001 to
6000
(1524
to
1829)
725 43 3.4/1.5 43 3.5/1.5 43 3.6/1.6 43 3.7/1.6
750 43 3.2/1.4 43 3.3/1.4 43 3.4/1.5 43 3.5/1.5
775 44 3.4/1.5 44 3.5/1.5 43 3.2/1.4 43 3.3/1.4
800 44 3.2/1.4 44 3.3/1.4 44 3.4/1.5 44 3.5/1.5
825 46 3.8/1.7 45 3.8/1.6 44 3.2/1.4 44 3.3/1.4
850 46 3.6/1.6 46 3.7/1.6 46 3.8/1.7 45 3.8/1.6
875 47 3.8/1.7 46 3.5/1.5 46 3.6/1.6 46 3.7/1.6
900 47 3.6/1.6 47 3.8/1.6 46 3.4/1.5 46 3.5/1.5
ALTITUDE
RANGE
FT. (M)
AVG. GAS
HEAT VALUE
AT ALTITUDE
(BTUH/CU FT.)
SPECIFIC GRAVITY OF NATURAL GAS
0.58 0.60 0.62 0.64
Orifice
No.
Manifold
Pressure
High/Low
Orifice
No.
Manifold
Pressure
High/Low
Orifice
No.
Manifold
Pressure
High/Low
Orifice
No.
Manifold
Pressure
High/Low
USA
6001 to
7000
(1829
to
2134)
675 43 3.4/1.5 43 3.5/1.5 43 3.6/1.6 43 3.7/1.6
700 44 3.6/1.6 43 3.3/1.4 43 3.4/1.5 43 3.5/1.5
725 44 3.4/1.5 44 3.5/1.5 44 3.6/1.6 43 3.2/1.4
750 45 3.8/1.7 44 3.3/1.4 44 3.4/1.5 44 3.5/1.5
775 46 3.7/1.6 45 3.7/1.6 45 3.8/1.7 44 3.2/1.4
800 46 3.5/1.5 46 3.6/1.6 46 3.8/1.6 45 3.7/1.6
825 47 3.7/1.6 46 3.4/1.5 46 3.5/1.5 46 3.6/1.6
850 47 3.5/1.5 47 3.6/1.6 47 3.8/1.6 46 3.4/1.5
ALTITUDE
RANGE
FT. (M)
AVG. GAS
HEAT VALUE
AT ALTITUDE
(BTUH/CU FT.)
SPECIFIC GRAVITY OF NATURAL GAS
0.58 0.60 0.62 0.64
Orifice
No.
Manifold
Pressure
High/Low
Orifice
No.
Manifold
Pressure
High/Low
Orifice
No.
Manifold
Pressure
High/Low
Orifice
No.
Manifold
Pressure
High/Low
USA
7001 to
8000
(2134
to
2438)
650 44 3.6/1.6 43 3.2/1.4 43 3.4/1.5 43 3.5/1.5
675 44 3.3/1.5 44 3.5/1.5 44 3.6/1.6 43 3.2/1.4
700 45 3.8/1.6 44 3.2/1.4 44 3.3/1.4 44 3.4/1.5
725 46 3.7/1.6 46 3.8/1.7 45 3.7/1.6 44 3.2/1.4
750 46 3.4/1.5 46 3.6/1.5 46 3.7/1.6 46 3.8/1.6
775 47 3.6/1.6 47 3.8/1.6 46 3.4/1.5 46 3.6/1.5
800 47 3.4/1.5 47 3.5/1.5 47 3.7/1.6 47 3.8/1.6
825 48 3.7/1.6 48 3.8/1.6 47 3.4/1.5 47 3.6/1.5
ALTITUDE
RANGE
FT. (M)
AVG. GAS
HEAT VALUE
AT ALTITUDE
(BTUH/CU FT.)
SPECIFIC GRAVITY OF NATURAL GAS
0.58 0.60 0.62 0.64
Orifice
No.
Manifold
Pressure
High/Low
Orifice
No.
Manifold
Pressure
High/Low
Orifice
No.
Manifold
Pressure
High/Low
Orifice
No.
Manifold
Pressure
High/Low
USA
8001 to
9000
(2438
to
2743)
625 44 3.3/1.5 44 3.5/1.5 44 3.6/1.6 43 3.2/1.4
650 45 3.7/1.6 44 3.2/1.4 44 3.3/1.4 44 3.4/1.5
675 46 3.6/1.6 46 3.8/1.6 45 3.7/1.6 45 3.8/1.7
700 47 3.8/1.7 46 3.5/1.5 46 3.6/1.6 46 3.7/1.6
725 47 3.6/1.6 47 3.7/1.6 47 3.8/1.7 46 3.5/1.5
750 48 3.8/1.7 47 3.5/1.5 47 3.6/1.6 47 3.7/1.6
775 48 3.6/1.5 48 3.7/1.6 48 3.8/1.7 47 3.5/1.5
USA
9001 to
10,000
2743 to
3048)
600 45 3.7/1.6 45 3.8/1.7 44 3.3/1.4 44 3.4/1.5
625 46 3.6/1.6 46 3.7/1.6 46 3.8/1.7 45 3.8/1.6
650 47 3.8/1.6 46 3.4/1.5 46 3.6/1.5 46 3.7/1.6
675 47 3.5/1.5 47 3.6/1.6 47 3.7/1.6 46 3.4/1.5
700 48 3.7/1.6 48 3.8/1.7 47 3.5/1.5 47 3.6/1.6
725 48 3.5/1.5 48 3.6/1.6 48 3.7/1.6 48 3.8/1.7
* Orifice numbers 43 are factory installed