Carrier 58CTA Installation And Service Instructions Manual page 41

Table 13–Orifice Size and Manifold Pressure for Gas Input Rate
(Tabulated Data Based On 22,000 Btuh High-Heat/14,500 Btuh for Low-Heat Per Burner,
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
Derated 4 Percent For Each 1000 Ft Above Sea Level)
0.58
Orifice Manifold
no. Pressure
42 3.5/1.5
42 3.3/1.4
43 3.8/1.7
43 3.6/1.6
43 3.5/1.5
43 3.3/1.4
44 3.6/1.6
44 3.4/1.5
44 3.3/1.4
0.58
Orifice Manifold
no. Pressure
42 3.4/1.5
42 3.2/1.4
43 3.7/1.6
43 3.5/1.5
43 3.3/1.4
44 3.5/1.5
44 3.4/1.5
44 3.2/1.4
45 3.7/1.6
0.58
Orifice Manifold
no. Pressure
42 3.2/1.4
43 3.6/1.6
43 3.4/1.5
43 3.2/1.4
44 3.5/1.5
44 3.3/1.4
45 3.8/1.6
46 3.8/1.6
0.58
Orifice Manifold
no. Pressure
43 3.6/1.6
43 3.4/1.5
43 3.2/1.4
44 3.4/1.5
44 3.2/1.4
45 3.7/1.6
46 3.7/1.6
46 3.5/1.5
SPECIFIC GRAVITY OF NATURAL GAS
0.60
Orifice Manifold Orifice
no. Pressure no.
42 3.6/1.6 42
42 3.4/1.5 42
42 3.3/1.4 42
43 3.8/1.6 42
43 3.6/1.6 43
43 3.4/1.5 43
43 3.2/1.4 43
44 3.5/1.5 43
44 3.4/1.5 44
SPECIFIC GRAVITY OF NATURAL GAS
0.60
Orifice Manifold Orifice
no. Pressure no.
42 3.5/1.5 42
42 3.3/1.4 42
43 3.8/1.6 42
43 3.6/1.6 43
43 3.4/1.5 43
43 3.2/1.4 43
44 3.5/1.5 44
44 3.3/1.4 44
45 3.8/1.7 44
SPECIFIC GRAVITY OF NATURAL GAS
0.60
Orifice Manifold Orifice
no. Pressure no.
42 3.3/1.4 42
43 3.8/1.6 42
43 3.5/1.5 43
43 3.3/1.4 43
44 3.6/1.6 43
44 3.4/1.5 44
44 3.2/1.4 44
45 3.7/1.6 45
SPECIFIC GRAVITY OF NATURAL GAS
0.60
Orifice Manifold Orifice
no. Pressure no.
43 3.8/1.6 42
43 3.5/1.5 43
43 3.3/1.4 43
44 3.6/1.5 43
44 3.4/1.5 44
45 3.8/1.7 44
46 3.8/1.7 45
46 3.6/1.6 46
39
0.62 0.64
Manifold Orifice Manifold
Pressure no. Pressure
3.7/1.6 41 3.5/1.5
3.5/1.5 42 3.7/1.6
3.4/1.5 42 3.5/1.5
3.2/1.4 42 3.3/1.4
3.7/1.6 43 3.8/1.7
3.5/1.5 43 3.6/1.6
3.4/1.5 43 3.5/1.5
3.2/1.4 43 3.3/1.4
3.5/1.5 43 3.2/1.4
0.62 0.64
Manifold Orifice Manifold
Pressure no. Pressure
3.6/1.6 42 3.7/1.6
3.4/1.5 42 3.5/1.5
3.2/1.4 42 3.3/1.4
3.7/1.6 43 3.8/1.7
3.5/1.5 43 3.6/1.6
3.3/1.4 43 3.4/1.5
3.6/1.6 43 3.2/1.4
3.4/1.5 44 3.5/1.5
3.2/1.4 44 3.4/1.5
0.62 0.64
Manifold Orifice Manifold
Pressure no. Pressure
3.4/1.5 42 3.5/1.5
3.2/1.4 42 3.3/1.4
3.7/1.6 43 3.8/1.6
3.4/1.5 43 3.6/1.5
3.3/1.4 43 3.4/1.5
3.5/1.5 43 3.2/1.4
3.3/1.5 44 3.4/1.5
3.8/1.7 44 3.3/1.4
0.62 0.64
Manifold Orifice Manifold
Pressure no. Pressure
3.2/1.4 42 3.3/1.4
3.6/1.6 43 3.8/1.6
3.4/1.5 43 3.5/1.5
3.2/1.4 43 3.3/1.4
3.5/1.5 44 3.6/1.6
3.3/1.4 44 3.4/1.5
3.7/1.6 44 3.2/1.4
3.7/1.6 46 3.8/1.7