Carrier 58CTA Installation And Service Instructions Manual page 44

Table 14–Orifice Size and Manifold Pressure for Gas Input Rate(Tabulated Data Based On 21,000 Btuh
ALTITUDE AVG GAS
RANGE HEAT VALUE
(FT) (BTU/CU FT)
900
925
950
975
0
to 1000
2000
1025
1050
1075
1100
ALTITUDE AVG GAS
RANGE HEAT VALUE
(FT) (BTU/CU FT)
U.S.A. 800
Altitudes
825
2001
850
to
875
3000
or 900
Canada
925
Altitudes
950
2001
975
to
4500 1000
ALTITUDE AVG GAS
RANGE HEAT VALUE
(FT) (BTU/CU FT)
775
800
825
3001
850
to
875
4000
900
925
950
ALTITUDE AVG GAS
RANGE HEAT VALUE
(FT) (BTU/CU FT)
750
775
800
4001
825
to
850
5000
875
900
925
* Orifice numbers 43 are factory installed
High-Heat/14,500 Btuh for Low-Heat Per Burner,
Derated 4 Percent For Each 1000 Ft Above Sea Level)
0.58
Orifice Manifold
no. Pressure
42 3.2/1.5
43 3.7/1.8
43 3.5/1.7
43 3.3/1.6
44 3.6/1.7
44 3.4/1.6
44 3.3/1.6
45 3.8/1.8
46 3.8/1.8
0.58
Orifice Manifold
no. Pressure
43 3.8/1.8
43 3.5/1.7
43 3.3/1.6
43 3.2/1.5
44 3.4/1.6
44 3.2/1.5
45 3.7/1.8
46 3.7/1.8
46 3.5/1.7
0.58
Orifice Manifold
no. Pressure
43 3.5/1.7
43 3.3/1.6
44 3.6/1.7
44 3.4/1.6
45 3.8/1.8
46 3.8/1.8
46 3.6/1.7
46 3.4/1.6
0.58
Orifice Manifold
no. Pressure
43 3.3/1.6
44 3.6/1.7
44 3.3/1.6
45 3.8/1.8
46 3.8/1.8
46 3.5/1.7
47 3.8/1.8
47 3.6/1.7
SPECIFIC GRAVITY OF NATURAL GAS
0.60
Orifice Manifold Orifice
no. Pressure no.
42 3.3/1.6 42
43 3.8/1.8 42
43 3.6/1.7 43
43 3.4/1.6 43
43 3.3/1.6 43
44 3.6/1.7 43
44 3.4/1.6 44
44 3.2/1.5 44
45 3.7/1.8 44
SPECIFIC GRAVITY OF NATURAL GAS
0.60
Orifice Manifold Orifice
no. Pressure no.
42 3.2/1.5 42
43 3.7/1.7 43
43 3.5/1.6 43
43 3.3/1.6 43
44 3.5/1.7 43
44 3.3/1.6 44
45 3.8/1.8 44
46 3.8/1.8 45
46 3.6/1.7 46
SPECIFIC GRAVITY OF NATURAL GAS
0.60
Orifice Manifold Orifice
no. Pressure no.
43 3.7/1.7 43
43 3.4/1.6 43
43 3.2/1.5 43
44 3.5/1.7 44
44 3.3/1.6 44
45 3.8/1.8 44
46 3.7/1.8 45
46 3.5/1.7 46
SPECIFIC GRAVITY OF NATURAL GAS
0.60
Orifice Manifold Orifice
no. Pressure no.
43 3.4/1.6 43
43 3.2/1.5 43
44 3.4/1.6 44
44 3.2/1.5 44
45 3.7/1.8 45
46 3.7/1.7 46
46 3.5/1.7 46
47 3.7/1.8 47
42
0.62 0.64
Manifold Orifice
Pressure no. Pressure
3.4/1.6 42
3.2/1.5 42
3.7/1.8 43
3.5/1.7 43
3.4/1.6 43
3.2/1.5 43
3.5/1.7 43
3.3/1.6 44
3.2/1.5 44
0.62 0.64
Manifold Orifice
Pressure no. Pressure
3.3/1.6 42
3.8/1.8 42
3.6/1.7 43
3.4/1.6 43
3.2/1.5 43
3.5/1.6 44
3.3/1.6 44
3.8/1.8 44
3.8/1.8 45
0.62 0.64
Manifold Orifice
Pressure no. Pressure
3.8/1.8 42
3.5/1.7 43
3.3/1.6 43
3.6/1.7 43
3.4/1.6 44
3.2/1.5 44
3.7/1.8 45
3.7/1.7 46
0.62 0.64
Manifold Orifice
Pressure no. Pressure
3.5/1.7 43
3.3/1.6 43
3.6/1.7 43
3.4/1.6 44
3.8/1.8 44
3.8/1.8 45
3.6/1.7 46
3.8/1.8 46
Manifold
3.5/1.7
3.3/1.6
3.8/1.8
3.7/1.7
3.5/1.7
3.3/1.6
3.2/1.5
3.4/1.6
3.3/1.6
Manifold
3.4/1.6
3.2/1.5
3.7/1.8
3.5/1.7
3.3/1.6
3.6/1.7
3.4/1.6
3.2/1.5
3.7/1.8
Manifold
3.2/1.5
3.7/1.7
3.4/1.6
3.2/1.5
3.5/1.7
3.3/1.6
3.8/1.8
3.8/1.8
Manifold
3.6/1.7
3.4/1.6
3.2/1.5
3.5/1.6
3.3/1.6
3.7/1.8
3.7/1.8
3.5/1.7