Carrier 58MXA - Page 35

Table 7—Model 58MXA Orifice Size and Manifold Pressure for Correct Input Continued
(Tabulated Data Based on 20,000 Btuh per Burner, Derated 2% for Each 1000 Ft Above Sea Level)
ALTITUDE
RANGE
(FT)
AVG GAS
HEAT VALUE
AT ALTITUDE
(BTU/CU FT)
SPECIFIC GRAVITY OF NATURAL GAS
0.58 0.60 0.62 0.64 0.66
Orifice
No.
Manifold
Pressure
Orifice
No.
Manifold
Pressure
Orifice
No.
Manifold
Pressure
Orifice
No.
Manifold
Pressure
Orifice
No.
Manifold
Pressure
U.S.A. Only
700 43 3.6 43 3.7 42 3.2 42 3.3 42 3.4
725 43 3.4 43 3.5 43 3.6 43 3.7 43 3.8
750 44 3.6 44 3.7 43 3.4 43 3.5 43 3.6
775 44 3.4 44 3.5 44 3.6 44 3.7 43 3.4
5001 800 44 3.2 44 3.3 44 3.4 44 3.5 44 3.6
825 45 3.6 45 3.7 44 3.2 44 3.3 44 3.4
to 850 45 3.4 45 3.5 45 3.6 45 3.8 44 3.2
875 45 3.2 45 3.3 45 3.4 45 3.6 45 3.7
6000 900 45 3.0 45 3.1 45 3.3 45 3.4 45 3.5
925 45 2.9 45 3.0 45 3.1 45 3.2 45 3.3
950 45 2.7 45 2.8 45 2.9 45 3.0 45 3.1
975 45 2.6 45 2.7 45 2.8 45 2.9 45 2.9
1000 45 2.5 45 2.5 45 2.6 45 2.7 45 2.8
ALTITUDE
RANGE
(FT)
AVG GAS
HEAT VALUE
AT ALTITUDE
(BTU/CU FT)
SPECIFIC GRAVITY OF NATURAL GAS
0.58 0.60 0.62 0.64 0.66
Orifice
No.
Manifold
Pressure
Orifice
No.
Manifold
Pressure
Orifice
No.
Manifold
Pressure
Orifice
No.
Manifold
Pressure
Orifice
No.
Manifold
Pressure
U.S.A. Only
650 42 3.2 42 3.3 42 3.4 42 3.5 42 3.6
675 43 3.6 43 3.7 43 3.8 42 3.2 42 3.3
700 44 3.8 43 3.4 43 3.6 43 3.7 43 3.8
6001 725 44 3.6 44 3.7 44 3.8 43 3.4 43 3.5
750 44 3.3 44 3.4 44 3.6 44 3.7 44 3.8
to 775 45 3.8 44 3.2 44 3.3 44 3.4 44 3.5
800 45 3.5 45 3.7 45 3.8 44 3.2 44 3.3
7000 825 45 3.3 45 3.4 45 3.6 45 3.7 45 3.8
850 45 3.1 45 3.2 45 3.4 45 3.5 45 3.6
875 45 3.0 45 3.1 45 3.2 45 3.3 45 3.4
ALTITUDE
RANGE
(FT)
AVG GAS
HEAT VALUE
AT ALTITUDE
(BTU/CU FT)
SPECIFIC GRAVITY OF NATURAL GAS
0.58 0.60 0.62 0.64 0.66
Orifice
No.
Manifold
Pressure
Orifice
No.
Manifold
Pressure
Orifice
No.
Manifold
Pressure
Orifice
No.
Manifold
Pressure
Orifice
No.
Manifold
Pressure
U.S.A. Only
625 43 3.8 42 3.3 42 3.4 42 3.5 42 3.6
650 43 3.5 43 3.7 43 3.8 42 3.2 42 3.3
675 44 3.8 43 3.4 43 3.5 43 3.6 43 3.7
7001 700 44 3.5 44 3.6 44 3.8 43 3.4 43 3.5
725 44 3.3 44 3.4 44 3.5 44 3.6 44 3.7
to 750 45 3.7 45 3.8 44 3.3 44 3.4 44 3.5
775 45 3.5 45 3.6 45 3.7 45 3.8 44 3.3
8000 800 45 3.3 45 3.4 45 3.5 45 3.6 45 3.7
825 45 3.1 45 3.2 45 3.3 45 3.4 45 3.5
850 45 2.9 45 3.0 45 3.1 45 3.2 45 3.3
ALTITUDE
RANGE
(FT)
AVG GAS
HEAT VALUE
AT ALTITUDE
(BTU/CU FT)
SPECIFIC GRAVITY OF NATURAL GAS
0.58 0.60 0.62 0.64 0.66
Orifice
No.
Manifold
Pressure
Orifice
No.
Manifold
Pressure
Orifice
No.
Manifold
Pressure
Orifice
No.
Manifold
Pressure
Orifice
No.
Manifold
Pressure
U.S.A. Only
600 43 3.8 42 3.3 42 3.4 42 3.5 42 3.6
625 43 3.5 43 3.6 43 3.8 42 3.2 42 3.3
8001 650 44 3.7 43 3.4 43 3.5 43 3.6 43 3.7
675 44 3.5 44 3.6 44 3.7 44 3.8 43 3.4
to 700 44 3.2 44 3.3 44 3.4 44 3.6 44 3.7
725 45 3.6 45 3.8 44 3.2 44 3.3 44 3.4
9000 750 45 3.4 45 3.5 45 3.6 45 3.8 44 3.2
775 45 3.2 45 3.3 45 3.4 45 3.5 45 3.6
800 45 3.0 45 3.1 45 3.2 45 3.3 45 3.4
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