International comfort products F8MVL Installation Instructions Manual page 36

Selectable AC Switch Settings
Unit
Size SW2−8 SW2−7
OFF OFF
OFF OFF
OFF ON
OFF ON
ON OFF
ON OFF
ON ON
ON ON
Selectable CF Switch Settings
SW2−5 SW2−4
OFF OFF
135−22
OFF OFF
OFF ON
OFF ON
ON OFF
ON OFF
ON ON
ON ON
Maximum Clg Airflow
High Heat Airflow
Low Heat Airflow
1. Nominal 350 CFM/ton cooling airflow is delivered with SW1−5 and SW4−3 set to OFF
Set SW1−5 to ON for nominal 400CFM/ton (+15% airflow)
Set SW4−3 to ON for nominal 325 CFM/ton (−7% airflow)
Set both SW1−5 and SW4−3 to ON for nominal 370CFM/ton (+7% airflow)
The above adjustments in airflow are subject to motor horsepower range/capacity
2. Maximum cooling airflow is achieved when switches SW2−6, SW2−7, SW2−8 and SW1−5 are set to ON, and SW4−3 is set to
OFF
3. All heating CFM's are when low heat rise adjustment switch SW1−3 and comfort/efficiency adjustment switch SW1−4 are both set
to OFF
4. Ductwork must be sized for high−heating CFM within the operational range of ESP. Operation within the blank areas of the chart is
not recommended because high−heat operation will be above 1.0 ESP
5. All airflows on 21" (533 mm) casing size furnaces are 5% less on side−return only installations
6. Side returns for 24.5" (622 mm) casing sizes require two sides, or a side and bottom to allow sufficient airflow at the return of the
furnace
7. Airflows over 1800 CFM require bottom return, two−side return, or bottom and side return or excessive watt draw may result. A
minimum filter size of 20x25" (508 x 635 mm) is required
36
Table 10 − Air Delivery − CFM (with filter)* (continued)
SW2−6 0.1 0.2
OFF 2040 1985
ON 850 740
OFF 1040 960
ON 1245 1170
OFF 1450 1385
ON 1670 1605
OFF 2040 1985
ON 2520 2455
SW2−3 0.1 0.2
OFF 850 740
ON 640 See note 4
OFF 850 740
ON 1040 960
OFF 1245 1170
ON 1450 1385
OFF 1670 1605
ON 2040 1985
2
2520 2455
3
2260 2205
3
2005 1950
Specifications are subject to change without notice.
External Static Pressure (ESP)
0.3 0.4 0.5
1930 1880 1830
See note 4
865 755 See note 4
1080 1005 920
1305 1245 1180
1540 1480 1425
1930 1880 1830
2405 2350 2290
External Static Pressure (ESP)
0.3 0.4 0.5
See note 4
See note 4
865 755 See note 4
1080 1005 920
1305 1245 1180
1540 1480 1425
1930 1880 1830
2405 2350 2290
2150 2100 2045
1895 1845 1790
0.6 0.7 0.8
1775 1715 1660
835 750 See note 4
1085 1015 935
1350 1280 1220
1775 1715 1660
2195 2090 1965
0.6 0.7 0.8
835 750 See note 4
1085 1015 935
1350 1280 1220
1775 1715 1660
2195 2090 1965
1985 1925 1855
1735 1675 1620
441 01 2122 01
0.9 1
1595 1510
880 805
1135 1070
1595 1510
1815 1615
0.9 1
880 805
1135 1070
1595 1510
1815 1615
1745 1600
1550 1475