Carrier 58CTW Product Data page 10

AIR DELIVERY—CFM (With Filter)* (Continued)
Cooling Switch Settings
Unit Size
SW2-8 SW2-7
110-22
OFF
OFF
OFF
OFF
ON
ON
ON
ON
Maximum Clg Airflow
High Heat Airflow
Low Heat Airflow
Cooling Switch Settings
Unit Size
SW2-8 SW2-7
135-22
OFF
OFF
OFF
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 SW2-2 set to OFF.
Set both SW1-5 and SW2-2 to ON for +7% airflow (nominal 370 CFM/ton).
Set SW1-5 to ON and SW2-2 to OFF for +15% airflow (nominal 400 CFM/ton).
Set SW2-2 to ON and SW1-5 to OFF for -7% airflow (nominal 325 CFM/ton).
2.
Maximum cooling airflow is achieved when switches SW2-6, SW2-7, SW2-8 and SW1-5 are set to ON, and SW2-2 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" casing size furnaces are 5% less on side return only installations.
6.
Side returns for 24.5" casing sizes require two sides, or side and bottom, to allow sufficient airflow at the return of the furnace.
SW2-6 0.1 0.2
OFF OFF 2055 2000
OFF ON 855 755
ON OFF 1060 985
ON ON 1250 1180
OFF OFF 1445 1380
OFF ON 1685 1630
ON OFF 2055 2000
ON ON 2465 2415
2
2465 2415
3
2105 2055
3
1740 1685
SW2-6 0.1 0.2
OFF OFF 2040 1985
OFF ON 850 740
ON OFF 1040 960
ON ON 1245 1170
OFF OFF 1450 1385
OFF ON 1670 1605
ON OFF 2040 1985
ON ON 2520 2455
2
2520 2455
3
2260 2205
3
2005 1950
External Static Pressure (ESP)
0.3 0.4 0.5 0.6
1950 1900 1840 1790
See note 4
875 800 700
1095 1025 925 860
1320 1235 1175 1100
1560 1505 1445 1375
1950 1900 1840 1790
2365 2305 2230 2140
2365 2305 2230 2140
2005 1955 1895 1850
1620 1560 1505 1440
External Static Pressure (ESP)
0.3 0.4 0.5 0.6
1930 1880 1830 1775
See note 4
865 755
1080 1005 920 835
1305 1245 1180 1085
1540 1480 1425 1350
1930 1880 1830 1775
2405 2350 2290 2195
2405 2350 2290 2195
2150 2100 2045 1985
1895 1845 1790 1735
10
0.7 0.8 0.9 1.0
1740 1675 1625 1565
See note 4
775 715 See note 4
1035 955 900 825
1320 1265 1195 1140
1740 1675 1625 1565
2045 1925 1805 1655
2045 1925 1805 1655
1795 1735 1665 1580
1385 1325 1260 1205
0.7 0.8 0.9 1.0
1715 1660 1595 1510
See note 4
750 See note 4
1015 935 880 805
1280 1220 1135 1070
1715 1660 1595 1510
2090 1965 1815 1615
2090 1965 1815 1615
1925 1855 1745 1600
1675 1620 1550 1475