International comfort products F8MVL Installation Instructions Manual page 46

Table 15 − Orifice Size and Manifold Pressure (In. W.C.) for Gas Input Rate (Con't.)
(Tabulated Data Based on 21,000 Btuh High−Heat/14,500 Btuh for Low−Heat Per Burner, Derated 4 Percent for Each 1000 Ft.
AVG. GAS
ALTITUDE RANGE
HEAT VALUE
FT. (M)
AT ALTITUDE
(BTUH/CU FT.)
675
700
6001 to 725
7000 750
USA
(1829 to
775
2134)
800
825
850
AVG. GAS
ALTITUDE RANGE HEAT VALUE
AT ALTITUDE
FT. (M)
(BTUH/CU FT.)
650
675
7001 to 700
8000 725
USA
(2134 to
750
2438)
775
800
825
AVG. GAS
ALTITUDE RANGE HEAT VALUE
AT ALTITUDE
FT. (M)
(BTUH/CU FT.)
625
650
8001 to
675
9000
USA 700
(2438 to
725
2743)
750
775
AVG. GAS
ALTITUDE RANGE HEAT VALUE
AT ALTITUDE
FT. (M)
(BTUH/CU FT.)
600
9001 to
625
10,000
650
USA
675
(2743 to
700
3048)
725
* Orifice numbers 43 are factory installed
CAUTION
!
CUT HAZARD
Failure to follow this caution may result in personal
injury.
Sheet metal parts may have sharp edges or burrs. Use
care and wear appropriate protective clothing, safety
glasses and gloves when handling parts, and servicing
furnaces.
The minimum maintenance on this furnace is as follows:
1. Check and clean air filter each month or more frequently if
required. Replace if torn.
2. Check blower motor and wheel for cleanliness each heat-
ing and cooling season. Clean as necessary.
3. Check electrical connections for tightness and controls for
proper operation each heating season. Service as neces-
sary.
46
(305 M) Above Sea level)
0.58
Manifold
Orifice Orifice
Pressure
No. No.
High/Low
44 3.5/1.7 43
44 3.3/1.6 44
45 3.7/1.8 45
46 3.6/1.7 46
46 3.4/1.6 46
47 3.6/1.7 47
47 3.4/1.6 47
48 3.7/1.7 48
0.58
Manifold
Orifice Orifice
Pressure
No. No.
High/Low
44 3.3/1.6 44
45 3.7/1.8 45
46 3.6/1.7 46
47 3.8/1.8 46
47 3.5/1.7 47
48 3.8/1.8 47
48 3.6/1.7 48
48 3.3/1.6 48
0.58
Manifold
Orifice Orifice
Pressure
No. No.
High/Low
45 3.7/1.8 45
46 3.6/1.7 46
47 3.8/1.8 46
47 3.5/1.7 47
48 3.7/1.8 48
48 3.5/1.7 48
49 3.8/1.8 48
0.58
Manifold
Orifice Orifice
Pressure
No. No.
High/Low
46 3.6/1.7 46
47 3.7/1.8 47
47 3.4/1.6 47
48 3.6/1.7 48
48 3.4/1.6 48
49 3.7/1.8 49
Specifications are subject to change without notice.
SPECIFIC GRAVITY OF NATURAL GAS
0.60
Manifold
Orifice
Pressure
No.
High/Low
3.2/1.5 43
3.4/1.6 44
3.8/1.8 44
3.8/1.8 45
3.5/1.7 46
3.8/1.8 46
3.5/1.7 47
3.8/1.8 47
SPECIFIC GRAVITY OF NATURAL GAS
0.60
Manifold
Orifice
Pressure
No.
High/Low
3.4/1.6 44
3.8/1.8 44
3.7/1.8 46
3.5/1.7 46
3.7/1.8 47
3.4/1.6 47
3.7/1.8 48
3.5/1.6 48
SPECIFIC GRAVITY OF NATURAL GAS
0.60
Manifold
Orifice
Pressure
No.
High/Low
3.8/1.8 44
3.7/1.8 46
3.4/1.6 46
3.6/1.7 47
3.8/1.8 47
3.6/1.7 48
3.4/1.6 48
SPECIFIC GRAVITY OF NATURAL GAS
0.60
Manifold
Orifice
Pressure
No.
High/Low
3.7/1.8 46
3.8/1.8 46
3.6/1.7 47
3.8/1.8 47
3.5/1.7 48
3.8/1.8 48
4. Inspect burner compartment before each heating season
for rust, corrosion, soot or excessive dust. If necessary,
have furnace and burner serviced by a qualified service
agency.
5. Inspect the vent pipe/vent system before each heating
season for rust, corrosion, water leakage, sagging pipes or
broken fittings. Have vent pipes/vent system serviced by a
qualified service agency.
6. Inspect any accessories attached to the furnace such as a
humidifier or electronic air cleaner. Perform any service or
maintenance to the accessories as recommended in the
accessory instructions.
0.62 0.64
Manifold
Orifice
Pressure
No.
High/Low
3.3/1.6 43
3.5/1.7 43
3.3/1.6 44
3.7/1.8 45
3.6/1.7 46
3.4/1.6 46
3.6/1.7 47
3.4/1.6 47
0.62 0.64
Manifold
Orifice
Pressure
No.
High/Low
3.5/1.7 43
3.3/1.6 44
3.8/1.8 45
3.6/1.7 46
3.8/1.8 46
3.6/1.7 47
3.8/1.8 47
3.6/1.7 48
0.62 0.64
Manifold
Orifice
Pressure
No.
High/Low
3.3/1.6 44
3.8/1.8 45
3.5/1.7 46
3.7/1.8 46
3.5/1.7 47
3.7/1.8 48
3.5/1.7 48
0.62 0.64
Manifold
Orifice
Pressure
No.
High/Low
3.8/1.8 45
3.5/1.7 46
3.7/1.8 47
3.4/1.6 47
3.6/1.7 48
3.4/1.6 48
441 01 2122 01
Manifold
Pressure
High/Low
3.4/1.6
3.2/1.5
3.4/1.6
3.8/1.8
3.8/1.8
3.5/1.7
3.8/1.8
3.5/1.7
Manifold
Pressure
High/Low
3.2/1.5
3.4/1.6
3.8/1.8
3.7/1.8
3.5/1.6
3.7/1.7
3.4/1.6
3.7/1.8
Manifold
Pressure
High/Low
3.4/1.6
3.8/1.8
3.7/1.7
3.4/1.6
3.6/1.7
3.8/1.8
3.6/1.7
Manifold
Pressure
High/Low
3.7/1.8
3.6/1.7
3.8/1.8
3.5/1.7
3.7/1.8
3.5/1.7