Carrier 58MXA Installation, Start-Up, And Operating Instructions Manual page 44

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TABLE 9--Model 58MXA Orifice Size and Manifold Pressure for Correct Input (Continued)
for Use W{th 040 Through 120 Size Furnaces Only
(Tabulated Data Based on 20,000 Btuh per Burner, Derated 2 Percent for Each 1000 ft Above Sea Levem)*
ALTITUDE
RANGE
(FT)
4001
to
5000
0%
derate
ALTITUDE
RANGE
(Ft)
500t
to
8000
11%
derate
ALTITUDE
RANGE
(Ft)
600t
to
7000
13%
derate
AVG GAS
HEAT VALUE
AT ALTITUDE
(BTU/CU FT)
725
750
775
800
825
850
875
900
925
950
Avg GAS
HEAT VALUE
AT ALTITUDE
(Btuteu ft)
700
725
750
775
800
825
850
875
900
925
950
975
1000
Avg GAS
HEAT VALUE
AT ALTITUDE
(Etuteu ft)
050
075
700
725
750
775
800
825
850
875
SPECIFIC GRAVITY OF NATURAL GAg
0.58 0.60 0.62
Orifice Manifotd Orifice Manifotd Orifice Manifold
No. Pressure No. Pressure No. Pressure
43 3.7 43 3.8 42 3.2
43 3.4 43 3.5 43 3.7
44 3.7 44 3.8 43 3.4
44 3.5 44 3.6 44 3.7
44 3.2 44 3.4 44 3.5
45 3.7 45 3.8 44 3.3
45 3.5 45 3.0 45 3.7
45 3.3 45 3.4 45 3.5
45 3.1 45 3.2 45 3.3
45 3.0 45 3.t 45 3.2
0.58
Orifice Manifotd
No. Pressure
43 3.6
43 3.4
44 3.6
44 3.4
44 3.2
45 3.6
45 3.4
45 3.2
45 3.0
45 2.9
45 2.7
45 2.0
45 2.5
0.64 0.66
Orifice Manifold Orifice Manifold
No. Pressure No. Pressure
42 3.3 42 3.4
43 3.8 42 3.2
43 3.5 43 3.7
44 3.8 43 3.4
44 3.6 44 3.7
44 3.4 44 3.5
44 3.2 44 3.3
48 3.0 45 3.8
45 3.4 48 3.0
45 3.3 45 3.4
SPECIFIC GRAVITY OF NATURAL GAS
0.58
Orifice Manifold
No. Pressure
42 3.2
43 3.6
44 3.8
44 3.6
44 3.3
45 3.8
45 3.5
45 3.3
45 3.1
45 3.0
0.60 0.62
Orifice Manifold Orifice Manifold
No. Pressure No. Pressure
43 3.7 42 3.2
43 3.5 43 3.6
44 3.7 43 3.4
44 3.5 44 3.6
44 3.3 44 3.4
45 3.7 44 3.2
45 3.5 45 3.0
45 3.3 45 3.4
45 3.t 45 3.3
45 3.0 45 3.t
45 2.8 45 2.9
45 2.7 48 2.8
45 2.5 45 2.0
0.84 0.66
Orifice Manifold Orifice Manifold
No. Pressure No. Pressure
42 3.3 42 3.4
43 3.7 43 3.8
43 3.5 43 3.6
44 3.7 43 3.4
44 3.5 44 3.6
44 3.3 44 3.4
45 3.8 44 3.2
45 3.0 45 3.7
45 3.4 45 3.5
45 3.2 45 3.3
45 3.0 45 3.1
45 2,9 45 2.9
45 2,7 45 2.8
SPECIFIC GRAVITY OF NATURAL GAS
0.00 0.62
Orifice Manifold Orifice Manifold
No. Pressure No. Pressure
42 3.3 42 3.4
43 3.7 43 3.8
43 3.4 43 3.6
44 3.7 44 3.8
44 3.4 44 3.6
44 3.2 44 3.3
45 3.7 45 3.8
45 3.4 45 3.6
45 3.2 45 3.4
45 3.t 45 3.2
0.64 0.66
Orifice Manifold Orifice Manifold
No. Pressure No. Pressure
42 3.5 42 3.6
42 3.2 42 3.3
43 3.7 43 3.8
43 3.4 43 3.5
44 3.7 44 3.8
44 3.4 44 3.5
44 3.2 44 3.3
45 3.7 45 3.8
45 3.5 45 3.0
45 3.3 45 3.4
Orifice numbers 45 shown in BOLD are factory installed.
Percents of derate are based on midpoints of U.S. Altitude ranges.
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