Carrier 58MCA series - Page 44

Table 10--Model 58MCA Orifice Size and _4anifold Pressure for Correct Input (Continued)
For Use with 140 Size Furnaces Only
(Tabulated Data Based on 23,000 Btuh per Burner, Derated 2% for Each 1000 Ft Above Sea Leve0 *
o
4
cO
5
C
o
<.
C
o
<.
03
5
ALTITUDE
RANGE
(FT)
4001
to
5000
9%
derate
ALTITUDE
RANGE
(FT)
500t
to
0000
11%
derate
ALTITUDE
RANGE
(FT)
G00t
to
7000
13%
derate
AVG GAS
NEAT VALUE
AT ALTITUDE
{BTUiCU FT)
725
75O
775
800
825
850
875
9OO
925
950
AVG GAS
NEAT VALUE
AT ALTITUDE
{BTUiCU FT)
700
725
750
775
800
825
850
875
900
925
950
975
1000
AVG GAS
NEAT VALUE
AT ALTITUDE
{BTUiCU FT)
050
675
7OO
725
750
775
800
825
85O
875
0.58
Orifice Manifold
No. Pressure
41 3.6
42 3.7
42 3.5
42 3.3
43 3.7
43 3,5
43 3,3
43 3,t
43 3,0
43 2,8
0.58
Orifice Manifold
No. Pressure
41 3.5
42 3.7
42 3.4
42 3.2
43 3.7
43 3.5
43 3,3
43 3.t
43 2.9
43 2.7
43 2.0
43 2.5
43 2.3
0.58
Orifice Manifold
No. Pressure
41 3.8
41 3.5
42 3.6
42 3.4
43 3.8
43 3,$
43 3,4
43 3,2
43 3.0
43 2.8
SPECIFIC GRAVITY OF NATURAL GAS
0.60 0.02
Orifice Manifotd Orifice Manifold
No. Pressure No. Pressure
41 3.7 41 3.8
42 3.8 41 3.6
42 3.6 42 3.7
42 3.4 42 3.5
42 3.2 42 3.3
43 3,$ 43 3.8
43 3.4 43 3.5
43 3,3 43 3,4
43 3.1 43 3.2
43 2.9 43 3.0
0.54 0.65
Orifice Manifold Orifice Manifold
No. Pressure No. Pressure
40 3.6 40 3.8
41 3.7 41 3.8
42 3.8 41 3.6
42 3.6 42 3.7
42 3.4 42 3.5
42 3.2 42 3.3
43 3.7 43 3.8
43 3.5 43 3.5
43 3.3 43 3.4
43 3.1 43 3,2
SPECIFIC GRAWTY OF NATURAL GAS
0.50 0.52
Orifice Manifold Orifice Manifold
No. Pressure No. Pressure
41 3.7 41 3.8
42 3.8 41 3.5
42 3.5 42 3.7
42 3.3 42 3.4
43 3,8 42 3.2
43 3.5 43 3.7
43 3,4 43 3,5
43 3,2 43 3,3
43 3.0 43 3.t
43 2.8 43 2.9
43 2.7 45 2.8
43 2.5 43 2.5
43 2.4 43 2.5
0.64 0.55
Orifice Manifold Orifice Manifold
No. Pressure No. Pressure
40 3.6 40 3.7
41 3.6 41 3.8
42 3.8 41 3.5
42 3.5 42 3.7
42 3.3 42 3.4
43 3.8 42 3.2
43 3.6 43 3.7
43 3.4 43 3.5
43 3.2 43 3.3
43 3.0 43 3.1
43 2,9 43 3,0
43 2,7 43 2.8
43 2.5 43 2.7
SPECIFIC GRAVITY OF NATURAL GAS
0.50 0.52
Orifice Manifold Orifice Manifold
No. Pressure No. Pressure
40 3.6 40 3.7
41 3.6 41 3.7
42 3.7 41 3.5
42 3.5 42 3.6
42 3.3 42 3.4
43 3.7 43 3.8
43 3.5 43 3.5
43 3.3 43 3.4
43 3.t 43 3.2
43 2.6 43 3.0
0.64 0.65
Orifice Manifold Orifice Manifold
No. Pressure No. Pressure
40 3.8 39 3.7
40 3.6 40 3.7
41 3.6 41 3.7
42 3.7 42 3.8
42 3.5 42 3.6
42 3.3 42 3.4
43 3.7 43 3.8
43 3.5 43 3.5
43 3.3 43 3.4
43 3.t 43 3.2
Orifice numbers shown in BOLD are factory installed.
Percents of derate are based on midpoint of U.S. altitude ranges.
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