![background image](http://html.mh-extra.com/html/carrier/58cva/58cva_installation-start-up-operating-and-service-and-maintenance-instructions_2562745033.webp)
k. Proceed to Step 7,
″
Set Blower Off Delay
″
before installing
blower access door.
9. Set Blower Off Delay
a. Remove blower access door if installed.
b. Turn Dip switch SW-7 or SW-8 ON or OFF for desired
blower off delay. See Table 8 and Fig 32 and 51.
10. Set thermostat heat anticipator.
TABLE 10–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,
Derated 4 Percent For Each 1000 Ft Above Sea Level)
ALTITUDE
RANGE
(FT)
AVG GAS
HEAT VALUE
(BTU/CU FT)
SPECIFIC GRAVITY OF NATURAL GAS
0.58
0.60
0.62
0.64
Orifice
no.
Manifold
Pressure
Orifice
no.
Manifold
Pressure
Orifice
no.
Manifold
Pressure
Orifice
no.
Manifold
Pressure
U.S.A.
and
Canada
0
to
2000
900
42
3.5/1.5
42
3.6/1.6
42
3.7/1.6
41
3.5/1.5
925
42
3.3/1.4
42
3.4/1.5
42
3.5/1.5
42
3.7/1.6
950
43
3.8/1.7
42
3.3/1.4
42
3.4/1.5
42
3.5/1.5
975
43
3.6/1.6
43
3.8/1.6
42
3.2/1.4
42
3.3/1.4
1000
43
3.5/1.5
43
3.6/1.6
43
3.7/1.6
43
3.8/1.7
1025
43
3.3/1.4
43
3.4/1.5
43
3.5/1.5
43
3.6/1.6
1050
44
3.6/1.6
43
3.2/1.4
43
3.4/1.5
43
3.5/1.5
1075
44
3.4/1.5
44
3.5/1.5
43
3.2/1.4
43
3.3/1.4
1100
44
3.3/1.4
44
3.4/1.5
44
3.5/1.5
43
3.2/1.4
ALTITUDE
RANGE
(FT)
AVG GAS
HEAT VALUE
(BTU/CU FT)
SPECIFIC GRAVITY OF NATURAL GAS
0.58
0.60
0.62
0.64
Orifice
no.
Manifold
Pressure
Orifice
no.
Manifold
Pressure
Orifice
no.
Manifold
Pressure
Orifice
no.
Manifold
Pressure
U.S.A.
and
Canada
U.S.A.
Altitudes
2001
to
3000
or
Canada
Altitudes
2001
to
4500
800
42
3.4/1.5
42
3.5/1.5
42
3.6/1.6
42
3.7/1.6
825
42
3.2/1.4
42
3.3/1.4
42
3.4/1.5
42
3.5/1.5
850
43
3.7/1.6
43
3.8/1.6
42
3.2/1.4
42
3.3/1.4
875
43
3.5/1.5
43
3.6/1.6
43
3.7/1.6
43
3.8/1.7
900
43
3.3/1.4
43
3.4/1.5
43
3.5/1.5
43
3.6/1.6
925
44
3.5/1.5
43
3.2/1.4
43
3.3/1.4
43
3.4/1.5
950
44
3.4/1.5
44
3.5/1.5
44
3.6/1.6
43
3.2/1.4
975
44
3.2/1.4
44
3.3/1.4
44
3.4/1.5
44
3.5/1.5
1000
45
3.7/1.6
45
3.8/1.7
44
3.2/1.4
44
3.4/1.5
ALTITUDE
RANGE
(FT)
AVG GAS
HEAT VALUE
(BTU/CU FT)
SPECIFIC GRAVITY OF NATURAL GAS
0.58
0.60
0.62
0.64
Orifice
no.
Manifold
Pressure
Orifice
no.
Manifold
Pressure
Orifice
no.
Manifold
Pressure
Orifice
no.
Manifold
Pressure
U.S.A. Only
3001
to
4000
775
42
3.2/1.4
42
3.3/1.4
42
3.4/1.5
42
3.5/1.5
800
43
3.6/1.6
43
3.8/1.6
42
3.2/1.4
42
3.3/1.4
825
43
3.4/1.5
43
3.5/1.5
43
3.7/1.6
43
3.8/1.6
850
43
3.2/1.4
43
3.3/1.4
43
3.4/1.5
43
3.6/1.5
875
44
3.5/1.5
44
3.6/1.6
43
3.3/1.4
43
3.4/1.5
900
44
3.3/1.4
44
3.4/1.5
44
3.5/1.5
43
3.2/1.4
925
45
3.8/1.6
44
3.2/1.4
44
3.3/1.5
44
3.4/1.5
950
46
3.8/1.6
45
3.7/1.6
45
3.8/1.7
44
3.3/1.4
ALTITUDE
RANGE
(FT)
AVG GAS
HEAT VALUE
(BTU/CU FT)
SPECIFIC GRAVITY OF NATURAL GAS
0.58
0.60
0.62
0.64
Orifice
no.
Manifold
Pressure
Orifice
no.
Manifold
Pressure
Orifice
no.
Manifold
Pressure
Orifice
no.
Manifold
Pressure
U.S.A.
Only
4001
to
5000
750
43
3.6/1.6
43
3.8/1.6
42
3.2/1.4
42
3.3/1.4
775
43
3.4/1.5
43
3.5/1.5
43
3.6/1.6
43
3.8/1.6
800
43
3.2/1.4
43
3.3/1.4
43
3.4/1.5
43
3.5/1.5
825
44
3.4/1.5
44
3.6/1.5
43
3.2/1.4
43
3.3/1.4
850
44
3.2/1.4
44
3.4/1.5
44
3.5/1.5
44
3.6/1.6
875
45
3.7/1.6
45
3.8/1.7
44
3.3/1.4
44
3.4/1.5
900
46
3.7/1.6
46
3.8/1.7
45
3.7/1.6
44
3.2/1.4
925
46
3.5/1.5
46
3.6/1.6
46
3.7/1.6
46
3.8/1.7
* Orifice numbers 43 are factory installed
32