Carrier 58ST - Page 45

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TABLE 13—ORIFICE SIZE* AND MANIFOLD PRESSURE FOR GAS INPUT RATE (CONTINUED)
(TABULATED DATA BASED ON 21,000 BTUH PER BURNER, DERATED 4 PERCENT FOR EACH 1000 FT. ABOVE SEA
LEVEL)
ALTITUDE
RANGE (F T.)
AVG. GAS HEAT
VALUE AT ALTI-
TUDE (BTU/CU
FT.)
SPECIFIC GRAVITY OF NATURAL GAS
0.58 0.60 0.62 0.64
Orifice
No.
Manifold
Pressure
Orifice
No.
Manifold
Pressure
Orifice
No.
Manifold
Pressure
Orifice
No.
Manifold
Pressure
U.S.
A.
Only
5001 to
6000
725 43 3.1 43 3.2 43 3.3 43 3.4
750 43 2.9 43 3.0 43 3.1 43 3.2
775 43 2.7 43 2.8 43 2.9 43 3.0
800 43 2.5 43 2.6 43 2.7 43 2.8
825 43 2.4 43 2.5 43 2.5 43 2.6
850 43 2.2 43 2.3 43 2.4 43 2.5
875 43 2.1 43 2.2 43 2.3 43 2.3
900 43 2.0 43 2.1 43 2.1 43 2.2
ALTITUDE
RANGE (F T.)
AVG. GAS HEAT
VALUE AT ALTI-
TUDE (BTU/CU
FT.)
SPECIFIC GRAVITY OF NATURAL GAS
0.58 0.60 0.62 0.64
Orifice
No.
Manifold
Pressure
Orifice
No.
Manifold
Pressure
Orifice
No.
Manifold
Pressure
Orifice
No.
Manifold
Pressure
U.S.
A.
Only
6001 to
7000
675 43 3.1 43 3.2 43 3.3 43 3.4
700 43 2.9 43 3.0 43 3.1 43 3.2
725 43 2.7 43 2.8 43 2.9 43 2.9
750 43 2.5 43 2.6 43 2.7 43 2.8
775 43 2.3 43 2.4 43 2.5 43 2.6
800 43 2.2 43 2.3 43 2.3 43 2.4
825 43 2.1 43 2.1 43 2.2 43 2.3
850 48 3.7 43 2.0 43 2.1 43 2.1
ALTITUDE
RANGE (F T.)
AVG. GAS HEAT
VALUE AT ALTI-
TUDE (BTU/CU
FT.)
SPECIFIC GRAVITY OF NATURAL GAS
0.58 0.60 0.62 0.64
Orifice
No.
Manifold
Pressure
Orifice
No.
Manifold
Pressure
Orifice
No.
Manifold
Pressure
Orifice
No.
Manifold
Pressure
U.S.
A.
Only
7001 to
8000
650 43 2.9 43 3.0 43 3.1 43 3.2
675 43 2.7 43 2.7 43 2.8 43 2.9
700 43 2.5 43 2.6 43 2.6 43 2.7
725 43 2.3 43 2.4 43 2.5 43 2.5
750 43 2.1 43 2.2 43 2.3 43 2.4
775 43 2.0 43 2.1 43 2.2 43 2.2
800 48 3.6 48 3.7 43 2.0 43 2.1
825 48 3.3 48 3.5 48 3.6 48 3.7
ALTITUDE
RANGE (F T.)
AVG. GAS HEAT
VALUE AT ALTI-
TUDE (BTU/CU
FT.)
SPECIFIC GRAVITY OF NATURAL GAS
0.58 0.60 0.62 0.64
Orifice
No.
Manifold
Pressure
Orifice
No.
Manifold
Pressure
Orifice
No.
Manifold
Pressure
Orifice
No.
Manifold
Pressure
U.S.
A.
Only
8001 to
9000
625 43 2.7 43 2.7 43 2.8 43 2.9
650 43 2.5 43 2.5 43 2.6 43 2.7
675 43 2.3 43 2.4 43 2.4 43 2.5
700 43 2.1 43 2.2 43 2.3 43 2.3
725 48 3.7 43 2.0 43 2.1 43 2.2
750 48 3.5 48 3.6 48 3.7 43 2.0
775 49 3.8 48 3.4 48 3.5 48 3.6
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