Carrier 58MCA series - Page 41

Table9--Model 58MCA Orifice Size and Manifold Pressure for Correct input (Continued)
For Use with 040 through 120 Size Furnaces Only
(Tabulated Data Based on 20,000 Btuh per Burner, Derated 2% for Each 1000 Ft Above Sea Level) *
ALTITUDE
RANGE
(FT)
400t
O
_ to
5000
9%
derate
ALTITUDE
RANGE
(FT)
5001
C
o
_ to
D 6000
11%
derate
ALTITUDE
RANGE
(FT)
G001
O
_ to
7000
13%
derate
AVG GAS
NEAT VALUE
AT ALTITUDE
(BTUiCU FT)
725
750
775
800
825
850
875
900
925
950
AVG GAS
HEAT VALUE
AT ALTITUDE
(BTUICU FT)
7O0
725
750
775
800
825
850
875
900
925
950
975
1000
AVG GAS
HEAT VALUE
AT ALTITUDE
(BTUiCU FT)
BS0
675
70O
725
750
775
800
825
85O
875
0.58
Odfice Manifold
No. Pressure
43 3.7
43 3.4
44 3.7
44 3.5
44 3.2
45 3.7
45 3.5
45 3.3
45 3.1
45 3.0
0.58
Orifice Manifold
No. Pressure
43 3.6
43 3.4
44 3.6
44 3.4
44 3.2
45 3.8
45 3.4
48 3.2
48 3.8
48 2.9
48 2.7
45 2.8
45 2.5
0.58
Orifice Manifold
No. Pressure
42 3.2
43 3.6
44 3.8
44 3.6
44 3.3
48 3.8
45 3.5
48 3.3
48 3.1
45 3.8
SPECIFIC GRAVITY OF NATURAL GAS
0.88
Orifice Manifold
No. Pressure
43 3.8
43 3.5
44 3.8
44 3.6
44 3.4
48 3.8
45 3.8
48 3.4
45 3.2
48 3.1
0.82 8.84 8.88
Orifice Manifold Orifice Manifold Orifice Manifold
No. Pressure No. Pressure No. Pressure
42 3.2 42 3.3 42 3.4
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 3.3 44 3.4 44 3.5
48 3.7 44 3.2 44 3.3
45 3.8 48 3.8 45 3.8
45 3.3 48 3.4 45 3.8
45 3.2 45 3.3 45 3.4
SPECIFIC GRAWTY OF NATURAL GAS
8.88
Orifice Manifold
No. Pressure
43 3.7
43 3.5
44 3.7
44 3.5
44 3.3
48 3.7
48 3.8
48 3.3
48 3.1
48 3.0
45 2.8
48 2.7
45 2.8
0.82 8.84 8.88
Orifice Manifold Orifice Manifold Orifice Manifold
No. Pressure No. Pressure No. Pressure
42 3.2 42 3.3 42 3.4
43 3.6 43 3.7 43 3.8
43 3.4 43 3.5 43 3.6
44 3.6 44 3.7 43 3.4
44 3.4 44 3.5 44 3.6
44 3.2 44 3.3 44 3.4
48 3.8 48 3.8 44 3.2
48 3.4 48 3.8 48 3.7
48 3.3 48 3.4 45 3.5
48 3.t 48 3.2 45 3.3
48 2.9 45 3.0 45 3.t
45 2.8 48 2.9 45 2.9
48 2.8 45 2.7 45 2.8
SPECIFIC GRAVITY OF NATURAL GAS
0.88 0.82 8.84 8.88
Orifice Manifold Orifice Manifold Orifice Manifold Orifice Manifold
No. Pressure No. Pressure No. Pressure No. Pressure
42 3.3 42 3.4 42 3.5 42 3.6
43 3.7 43 3.8 42 3.2 42 3.3
43 3.4 43 3.6 43 3.7 43 3.8
44 3.7 44 3.8 43 3.4 43 3.5
44 3.4 44 3.6 44 3.7 44 3.8
44 3.2 44 3.3 44 3.4 44 3.5
48 3.7 48 3.8 44 3.2 44 3.3
48 3.4 48 3.8 48 3.7 45 3.8
48 3.2 48 3.4 48 3.8 45 3.8
45 3.t 48 3.2 45 3.3 45 3.4
* Orifice numbers shown in BOLD are factory instatled.
Percents of derate are based on midpoint of U.S. altitude ranges.
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