Carrier 58MTB Installation, Start-Up, And Operating Instructions Manual page 53

Table 14—Model 58MTB Orifice Size and High/Low-Heat Manifold Pressures for Correct Inputs (Continued)
ALTITUDE AVG GAS
RANGE HEAT VALUE
(FT) (BTU/CU FT)
725
750
775
4001
800
to
825
5000
850
9%
875
derate
900
925
950
ALTITUDE AVG GAS
RANGE HEAT VALUE
(FT) (BTU/CU FT)
700
725
750
775
800
5001
825
to
6000 850
11%
875
derate
900
925
950
975
1000
ALTITUDE AVG GAS
RANGE HEAT VALUE
(FT) (BTU/CU FT)
650
675
700
6001
725
to
750
7000
775
13%
800
derate
825
850
875
* Orifice numbers shown in shading are factory installed.
NOTE: Percents of derate are based on midpoints of U.S. altitude ranges.
for Use With 060 Through 120 Size Furnaces Only
(Tabulated Data Based on 20,000/13,000 Btuh per Burner,
Derated 2 Percent for Each 1000 ft Above Sea Level)*
0.58
Orifice Manifold Orifice
no. Pressure no.
43 3.7/1.5 43
44 3.4/1.4 43
44 3.7/1.6 44
44 3.51.5 44
44 3.2/1.4 44
45 3.5/1.5 45
45 3.3/1.4 45
45 3.3/1.4 45
47 3.7/1.6 45
47 3.5/1.5 47
0.58
Orifice Manifold Orifice
no. Pressure no.
43 3.6/1.5 43
43 3.4/1.4 43
44 3.6/1.5 44
44 3.4/1.4 44
44 3.2/1.3 44
45 3.6/1.5 45
45 3.4/1.4 45
45 3.2/1.4 45
47 3.6/1.5 47
47 3.4/1.4 47
48 3.7/1.6 48
48 3.5/1.5 48
48 3.3/1.4 48
0.58
Orifice Manifold Orifice
no. Pressure no.
42 3.2/1.3 42
43 3.6/1.5 43
44 3.8/1.6 43
44 3.6/1.5 44
44 3.3/1.4 44
45 3.8/1.6 44
45 3.5/1.5 45
45 3.3/1.4 45
47 3.7/1.6 45
47 3.5/1.5 47
SPECIFIC GRAVITY OF NATURAL GAS
0.60 0.62
Manifold Orifice Manifold
Pressure no. Pressure
3.8/1.6 42 3.2/1.4
3.5/1.5 43 3.7/1.5
3.8/1.6 43 3.4/1.4
3.6/1.5 44 3.7/1.6
3.4/1.4 44 3.5/1.5
3.8/1.6 44 3.3/1.4
3.6/1.5 45 3.7/1.6
3.4/1.4 45 3.5/1.5
3.2/1.4 45 3.3/1.4
3.6/1.5 45 3.2/1.3
SPECIFIC GRAVITY OF NATURAL GAS
0.60 0.62
Manifold Orifice Manifold
Pressure no. Pressure
3.7/1.6 42 3.2/1.3
3.5/1.5 43 3.6/1.5
3.7/1.6 43 3.4/1.4
3.5/1.5 44 3.6/1.5
3.3/1.5 44 3.4/1.4
3.7/1.6 44 3.2/1.4
3.5/1.5 45 3.6/1.5
3.3/1.4 45 3.4/1.5
3.7/1.6 45 3.3/1.4
3.5/1.5 47 3.7/1.5
3.8/1.6 47 3.5/1.5
3.6/1.5 48 3.8/1.6
3.5/1.5 48 3.6/1.5
SPECIFIC GRAVITY OF NATURAL GAS
0.60 0.62
Manifold Orifice Manifold
Pressure no. Pressure
3.3/1.4 42 3.4/1.4
3.7/1.6 43 3.8/1.6
3.4/1.5 43 3.6/1.5
3.7/1.6 44 3.8/1.6
3.4/1.5 44 3.6/1.5
3.2/1.4 44 3.3/1.4
3.7/1.5 45 3.8/1.6
3.4/1.5 45 3.6/1.5
3.2/1.4 45 3.4/1.4
3.6/1.5 45 3.2/1.3
53
0.64 0.66
Orifice Manifold Orifice
no. Pressure no.
42 3.3/1.4 42
43 3.8/1.6 42
43 3.5/1.5 43
44 3.8/1.6 43
44 3.6/1.5 44
44 3.4/1.4 44
44 3.2/1.3 44
45 3.6/1.5 45
45 3.4/1.5 45
45 3.3/1.4 45
0.64 0.66
Orifice Manifold Orifice
no. Pressure no.
42 3.3/1.4 42
43 3.7/1.6 43
43 3.5/1.5 43
44 3.7/1.6 43
44 3.5/1.5 44
44 3.3/1.4 44
45 3.8/1.6 44
45 3.6/1.5 45
45 3.4/1.4 45
45 3.2/1.3 45
47 3.6/1.5 47
47 3.4/1.4 47
48 3.7/1.6 48
0.64 0.66
Orifice Manifold Orifice
no. Pressure no.
42 3.5/1.5 42
42 3.2/1.4 42
43 3.7/1.6 43
43 3.4/1.4 43
44 3.7/1.6 44
44 3.4/1.5 44
44 3.2/1.4 44
45 3.7/1.6 45
45 3.5/1.5 45
45 3.3/1.4 45
Manifold
Pressure
3.4/1.4
3.2/1.4
3.7/1.5
3.4/1.4
3.7/1.6
3.5/1.5
3.3/1.4
3.8/1.6
3.6/1.5
3.4/1.4
Manifold
Pressure
3.4/1.4
3.8/1.6
3.6/1.5
3.4/1.4
3.6/1.5
3.4/1.4
3.2/1.4
3.7/1.5
3.5/1.5
3.3/1.4
3.7/1.6
3.5/1.5
3.8/1.6
Manifold
Pressure
3.6/1.6
3.3/1.4
3.8/1.6
3.5/1.5
3.8/1.6
3.5/1.5
3.3/1.4
3.8/1.6
3.6/1.5
3.4/1.4