Table 11--Model 58MSA 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 Levem)*
o
4
o
4
C
o
4
ALTITUDE
RANGE
(FT)
700t
to
8000
19%
derate
ALTITUDE
RANGE
(FT)
800t
to
9000
17%
derate
ALTITUDE
RANGE
(FT)
900t
to
t0,000
19%
derate
AVG GAS
NEAT VALUE
AT ALTITUDE
(BTUICU FT)
929
990
975
700
799
750
775
800
895
890
AVG GAS
NEAT VALUE
AT ALTITUDE
(BTUiCU FT)
900
929
990
975
700
799
750
779
8OO
AVG GAS
NEAT VALUE
AT ALTITUDE
(BTUICU FT)
979
900
929
950
975
700
795
750
779
0.58
Orifice Manifold
No. Pressure
43 3.8
43 3.5
44 3.8
44 3.5
44 3.3
49 9.7
49 9.9
49 3.3
49 3.t
49 2.9
0.58
Orifice Manifold
No. Pressure
43 3.8
43 3.5
44 3.7
44 3.5
44 3.2
49 9.9
49 9.4
49 9.2
49 3.0
0.58
Orifice Manifold
No. Pressure
43 3.8
43 3.5
44 3.7
44 3.4
45 9.8
45 3.9
45 3.3
49 3.1
49 2.9
SPI=CIFIC GRAVITY OF NATURAL GAS
0.90 0.92
Orifice Manifold Orifice Manifold
No. Pressure No. Pressure
42 3.3 42 3.4
43 3.7 43 3.8
43 3.4 43 3.5
44 3.6 44 3.8
44 3.4 44 3.5
45 3.8 44 3.3
45 9.9 49 9.7
49 9.4 49 9.5
45 3.2 45 3.3
49 3.0 45 3.1
0.5.4 0.99
Orifice Manifold Orifice Manifold
No. Pressure No. Pressure
42 3.5 42 3.6
42 3.2 42 3.3
43 3.6 43 3.7
43 3.4 43 3.5
44 3.6 44 3.7
44 3.4 44 3.5
45 9.8 44 3.3
49 9.9 49 3.7
49 9.4 49 3.5
49 9.2 49 3.9
SPECIFIC GRAVITY OF NATURAL GAS
0.90 0.92
Orifice Manifotd Orifice Manifold
No. Pressure No. Pressure
42 3.3 42 3.4
43 3.6 43 3.8
43 3.4 43 3.5
44 3.6 44 3.7
44 3.3 44 3.4
45 3.8 44 3.2
49 9.5 45 9.9
45 3.3 45 3.4
49 9.t 49 3.2
0.64 0.69
Orifice Manifold Orifice Manifold
No. Pressure No. Pressure
42 3.5 42 3.6
42 3.2 42 3.3
43 3.6 43 3.7
44 3.8 43 3.4
44 3.6 44 3.7
44 3.3 44 3.4
49 3.8 44 3.2
45 9.9 49 3.9
49 9.9 49 3.4
SPECIFIC GRAWTY OF NATURAL GAS
0.90 0.92
Orifice Manifold Orifice Manifold
No. Pressure No. Pressure
42 3.2 42 3.3
43 3.6 43 3.7
44 3.8 43 3.5
44 3.5 44 3.7
44 3.3 44 3.4
45 9.7 45 9.8
45 3.4 45 3.9
45 3.2 45 3.3
49 3.0 49 9.1
0.54 0.99
Orifice Manifold Orifice Manifold
No. Pressure No. Pressure
42 3.5 42 3.6
42 3.2 42 3.3
43 3.6 43 3.7
44 3.8 43 3.4
44 3.5 44 3.6
44 3.3 44 3.4
49 9.7 49 3.8
49 3.4 49 3.5
49 3.2 49 3.9
*Orifice numbers 45 are factory installed.
Percents of derate are based on U.S. altitude ranges.
42
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