926SB: Installation, Start-up, Operating, Service and Maintenance Instructions
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
51
NOTE:
1. A filter is required for each return-air inlet. Airflow performance included 3/4-in. (19 mm) washable filter media such as contained in a factory - authorized accessory filter rack. See
accessory list. To determine airflow performance without this filter, assume an additional 0.1 in. w.c. available external static pressure.
2. Adjust the blower airflow setting as necessary for the proper air temperature rise for each installation.
3. Airflows over 1800 CFM require bottom return, two-side return, or bottom and side return. A minimum filter size of 20” x 25” (508 x 635 mm) is required.
4. For upflow applications, air entering from one side into both the side of the furnace and a return air base counts as a side and bottom return
5. The - entry indicates unstable operating conditions
60100V21
1 Cont. Fan 740 655 570 480 400 325 245 170 - -
2 840 760 680 605 525 450 385 315 240 170
3 930 860 785 710 640 565 500 435 370 305
4 1025 955 890 820 750 685 615 555 495 435
5 1130 1065 1000 940 875 810 750 685 620 570
6 1225 1165 1105 1045 985 925 870 815 750 690
7 1310 1255 1200 1145 1090 1035 975 920 870 810
8 1395 1345 1290 1235 1185 1135 1080 1020 970 920
9 1495 1445 1395 1345 1295 1245 1195 1145 1090 1045
10 1590 1545 1495 1445 1400 1350 1305 1255 1210 1160
11 1640 1595 1550 1505 1455 1410 1365 1320 1270 1225
12 Low Cooling 1695 1650 1605 1560 1515 1470 1425 1380 1335 1290
13 Heating 1740 1695 1650 1605 1560 1515 1475 1430 1385 1340
14 1780 1735 1690 1650 1605 1560 1520 1475 1430 1390
15 1840 1800 1760 1715 1675 1630 1590 1545 1505 1465
16 1895 1855 1815 1775 1730 1690 1650 1610 1570 1530
17 1940 1900 1860 1820 1780 1740 1700 1660 1620 1580
18 1980 1945 1905 1865 1825 1785 1745 1705 1670 1630
19 2035 2000 1960 1925 1885 1845 1810 1770 1730 1695
20 2080 2045 2010 1970 1935 1895 1860 1820 1785 1745
21 2115 2075 2040 2005 1970 1930 1895 1855 1820 1785
22 2145 2110 2075 2040 2005 1970 1930 1895 1860 1820
23 2185 2150 2110 2080 2040 2010 1970 1935 1900 1845
24 High Cooling 2250 2220 2185 2150 2115 2065 2015 1955 1900 1845
25 2320 2275 2225 2170 2120 2065 2015 1955 1900 1845
66120V24
1 Cont. Fan 750 650 555 440 350 265 170 - - -
2 825 730 640 545 450 360 285 195 - -
3 900 805 720 640 540 455 375 300 215 140
4 995 910 825 755 675 580 505 425 360 285
5 1085 1005 930 855 785 705 620 550 475 410
6 1170 1090 1020 950 885 815 740 655 585 520
7 1270 1200 1130 1065 995 940 875 800 730 660
8 1370 1305 1235 1170 1110 1050 995 930 865 795
9 1460 1400 1335 1270 1215 1155 1095 1045 985 920
10 1565 1510 1450 1385 1330 1275 1220 1165 1120 1065
11 1665 1610 1555 1495 1440 1390 1340 1285 1235 1190
12 Low Cooling 1755 1705 1650 1600 1545 1495 1445 1395 1345 1300
13 1800 1755 1700 1650 1595 1545 1500 1450 1400 1355
14 1845 1800 1750 1700 1645 1595 1550 1505 1455 1410
15 1895 1850 1805 1755 1705 1655 1610 1565 1520 1475
16 1950 1905 1860 1810 1760 1715 1670 1625 1585 1540
17 Heating 2005 1955 1915 1865 1820 1770 1725 1685 1645 1600
18 2055 2010 1965 1920 1875 1830 1785 1745 1705 1665
19 2100 2060 2020 1975 1930 1885 1845 1800 1765 1725
20 2150 2110 2070 2025 1985 1945 1900 1860 1820 1785
21 2205 2165 2125 2085 2045 2005 1965 1925 1885 1850
22 High Cooling 2250 2215 2180 2140 2100 2060 2025 1985 1945 1910
23 2305 2270 2235 2200 2165 2125 2085 2045 2000 1950
24 2360 2325 2290 2255 2215 2170 2125 2070 2015 1965
25 2425 2385 2345 2295 2245 2190 2140 2080 2025 1970
Table 19 – Air Delivery - CFM (with filter) (Continued)
Unit Size
Airflow
Setting
Default Setting
External Static Pressure (in. w.c.)
0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1
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