Carrier 58MXA Installation, Start-Up, And Operating Instructions Manual page 37

TABLE 8—MODEL 58MXA ORIFICE SIZE AND MANIFOLD PRESSURE FOR CORRECT INPUT
(TABULATED DATA BASED ON 20,000 BTUH PER BURNER, DERATED 2 PERCENT FOR EACH 1000 FT
ALTITUDE AVG GAS
RANGE HEAT VALUE
(FT) (BTU/CU FT)
850
875
900
925
950
0
to 975
2000
1000
1025
1050
1075
1100
ALTITUDE AVG GAS
RANGE HEAT VALUE
(FT) (BTU/CU FT)
775
800
Altitudes
825
2001
to 850
3000
875
or
900
Canada
925
Altitudes
2000 950
to
975
4500
1000
1025
ALTITUDE AVG GAS
RANGE HEAT VALUE
(FT) (BTU/CU FT)
750
775
800
825
850
3001
to 875
4000
900
925
950
975
1000
* Orifice numbers shown in shading are factory installed.
FOR USE WITH 040 THROUGH 120 SIZE FURNACES ONLY
ABOVE SEA LEVEL)
0.58
Orifice Manifold Orifice
no. Pressure no.
43 3.7 43
43 3.5 43
44 3.7 43
44 3.5 44
44 3.4 44
44 3.2 44
45 3.7 45
45 3.5 45
45 3.3 45
45 3.2 45
47 3.6 47
0.58
Orifice Manifold Orifice
no. Pressure no.
43 3.8 42
43 3.5 43
44 3.8 43
44 3.6 44
44 3.4 44
44 3.2 44
45 3.7 45
45 3.5 45
45 3.3 45
45 3.1 45
45 3.0 45
0.58
Orifice Manifold Orifice
no. Pressure no.
43 3.7 43
43 3.5 43
44 3.7 43
44 3.5 44
44 3.3 44
45 3.8 44
45 3.6 45
45 3.4 45
45 3.2 45
45 3.0 45
45 2.9 45
SPECIFIC GRAVITY OF NATURAL GAS
0.60 0.62
Manifold Orifice Manifold
Pressure no. Pressure
3.8 42 3.2
3.6 43 3.7
3.4 43 3.5
3.7 44 3.8
3.5 44 3.6
3.3 44 3.4
3.8 44 3.2
3.6 45 3.7
3.4 45 3.6
3.3 45 3.4
3.7 45 3.2
SPECIFIC GRAVITY OF NATURAL GAS
0.60 0.62
Manifold Orifice Manifold
Pressure no. Pressure
3.2 42 3.3
3.7 43 3.8
3.4 43 3.6
3.7 44 3.8
3.5 44 3.6
3.3 44 3.4
3.8 44 3.2
3.6 45 3.7
3.4 45 3.5
3.2 45 3.4
3.1 45 3.2
SPECIFIC GRAVITY OF NATURAL GAS
0.60 0.62
Manifold Orifice Manifold
Pressure no. Pressure
3.8 42 3.3
3.6 43 3.7
3.4 43 3.5
3.6 44 3.8
3.4 44 3.5
3.2 44 3.3
3.7 45 3.8
3.5 45 3.6
3.3 45 3.4
3.2 45 3.3
3.0 45 3.1
37
0.64 0.66
Orifice Manifold Orifice
no. Pressure no.
42 3.3 42
43 3.8 42
43 3.6 43
43 3.4 43
44 3.7 44
44 3.5 44
44 3.4 44
44 3.2 44
45 3.7 45
45 3.5 45
45 3.4 45
0.64 0.66
Orifice Manifold Orifice
no. Pressure no.
42 3.4 42
42 3.2 42
43 3.7 43
43 3.5 43
44 3.7 43
44 3.5 44
44 3.3 44
45 3.8 44
45 3.6 45
45 3.5 45
45 3.3 45
0.64 0.66
Orifice Manifold Orifice
no. Pressure no.
42 3.4 42
43 3.8 42
43 3.6 43
43 3.4 43
44 3.7 44
44 3.5 44
44 3.3 44
45 3.7 44
45 3.5 45
45 3.4 45
45 3.2 45
Manifold
Pressure
3.4
3.2
3.7
3.5
3.8
3.6
3.5
3.3
3.8
3.6
3.5
Manifold
Pressure
3.5
3.3
3.8
3.6
3.4
3.6
3.4
3.3
3.8
3.6
3.4
Manifold
Pressure
3.5
3.2
3.7
3.5
3.8
3.6
3.4
3.2
3.7
3.5
3.3