Carrier 58MXA Installation, Start-Up, And Operating Instructions Manual page 46

Table10--Model58tVlXA O rificeSize
and Manifold Pressure for Correct Input
For Use with 140 Size Furnaces Only
(Tabulated Data Based on 23,000 Btuh pet Burner, Detated 2"/. for Each 1000 Ft Above Sea Level) *
L)
==
8
==
C
o
ALTITUDE
RANGE
(FT)
to
2000
0%
derate
ALTITUDE
RANGE
(ft)
U.S.A.
Altitudes
2001 to
3000 or
Canada
Altitudes
2001 to
4500
5%
derate
ALTITUDE
RANGE
(ft)
300t
to
4000
7%
derate
AVG GAS
HEAT VALUE
AT ALTITUDE
(BTUiCU FT)
850
875
9O0
925
950
975
iO00
i025
i050
i075
iiO0
AVG GAS
HEAT VALUE
AT ALTITUDE
(Btutcu _)
775
800
825
850
875
900
925
950
975
iO00
i025
AVG GAS
HEAT VALUE
AT ALTITUDE
(Btulca_)
750
775
8O0
825
850
875
9O0
925
950
975
iO00
0.58
Orifice Manifold
No. Pressure
41 3.6
42 3.8
42 3.5
42 3.4
42 3.2
43 3.7
43 3.5
43 3.3
43 3.2
44 3.5
44 3.3
0.58
Orifice Manifold
No. Pressure
41 3.7
42 3.8
42 3.6
42 3.4
42 3.2
43 3.7
43 3.5
43 3.3
43 3.i
43 3.0
43 2.8
SPECIFIC GRAVITY OF NATURAL GAS
0.50 0.82
Orifice Manifold Orifice Manifold
No. Pressure No. Pressure
41 3.7 41 3.8
41 3.5 41 3.6
42 3.7 42 3.8
42 3.5 42 3.6
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 3.3 43 3.4
44 3.5 43 3.2
44 3.4 44 3.5
0.64 0.65
Orifice Mani_Id Orifice Manifold
No. Pressure No. Pressure
40 3.6 40 3.8
41 3.7 41 3.8
41 3.5 41 3.6
42 3.7 42 3.8
42 3.5 42 3.6
42 3.3 42 3.4
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 3.2 43 3.3
SPECIFIC GRAVtTY OF NATURAL GAS
0.50 0.52
Orifice Manifotd Orifice Manifold
No. Pressure No. Pressure
41 3.8 40 3.6
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 3,8 42 3.2
43 3.5 43 3.7
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 3.7 39 3.6
41 3.8 40 3.6
41 3.6 41 3.7
42 3.7 41 3.5
42 3.5 42 3.6
42 3.3 42 3.4
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 GRAVtTY OF NATURAL GAS
0.58 0.50 0.52
Orifice Manifold Orifice Manifotd Orifice Manifotd
No. Pressure No. Pressure No. Pressure
41 3.6 41 3.8 40 3.6
42 3.8 41 3.5 41 3.6
42 3.5 42 3.7 42 3.8
42 3.3 42 3.4 42 3.6
43 3.8 42 3.2 42 3.4
43 3.5 43 3.7 42 3.2
43 3.4 43 3.5 43 3.5
43 3.2 43 3.3 43 3.5
43 3.t 43 3.2 43 3.3
43 2.9 43 3.0 43 3.1
43 2.8 43 2.9 43 3.0
0.64 0.55
Orifice Mani_Id Orifice Mani_Id
No. Pressure No. Pressure
40 3.7 40 3.8
41 3.7 40 3.6
41 3.5 41 3.6
42 3.7 42 3.8
42 3.5 42 3.6
42 3.3 42 3.4
43 3.8 42 3.2
43 3.5 45 3.7
43 3.4 43 3.5
43 3.2 43 3.3
43 3.0 43 3.1
Orifice numbers 43 shown in BOLD are factory installed.
Percents of derate are based on midpoints of U.S. altitude ranges.
4d