10
AIR DELIVERY -- CFM (BOTTOM RETURN WITH FILTER)
Unit Size
Operating Mode
CFM Airflow
External Static External Static Pressure (ESP)
Setting
Pressure
Range*
0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
060--- 14
{{
Low Heat
410{
0---0.50
410 410 410 410 405
{{
Medium Heat
560{
0---0.50
545 560 560 560 560
High Heat
1070{
0 --- 1 . 0
1065 1070 1070 1070 1070 1070 1070 1065 1045 1015
{{
1 --- 1 / 2 --- To n A/ C C o o l i n g
525
0---0.50}
525 525 525 525 525
{{
2 --- To n A / C C o o l in g
700
0---0.50}
700 700 700 700 700
2 --- 1 / 2 --- To n A/ C C o o l i n g
875
0 --- 1 . 0 }
875 875 875 875 875 875 875 875 860 840
3 --- To n A / C C o o l in g
1050
0 --- 1 . 0
1050 1050 1050 1050 1050 1050 1050 1050 1050 1045
3 --- 1 / 2 --- To n A/ C C o o l i n g
1225
0 --- 1 . 0
1225 1225 1225 1225 1225 1225 1225 1225 1225 1205
Maximum
1400
0 --- 1 . 0
1400 1400 1400 1400 1400 1400 1400 1400 1380 1325
080--- 14***
{{
Low Heat
540{
0---0.50
540 540 535 525 510
{{
Medium Heat
710{
0---0.50
695 695 685 685 685
High Heat
1220{
0 --- 1 . 0
1220 1220 1220 1220 1220 1220 1220 1220 1195 1150
{{
1 --- 1 / 2 --- To n A/ C C o o l i n g
525
0---0.50}
515 495 490 475 465
{{
2 --- To n A / C C o o l in g
700
0---0.50}
685 680 670 665 665
2 --- 1 / 2 --- To n A/ C C o o l i n g
875
0 --- 1 . 0 }
830 840 850 860 860 855 840 830 825 820
3 --- To n A / C C o o l in g
1050
0 --- 1 . 0 }
1050 1050 1050 1050 1050 1045 1040 1025 1015 1000
3 --- 1 / 2 --- To n A/ C C o o l i n g
1225
0 --- 1 . 0 }
1225 1225 1225 1225 1225 1225 1225 1225 1185 1140
Maximum
1400
0 --- 1 . 0 }
1400 1400 1400 1400 1375 1325 1280 1235 1190 1145
080--- 20***
{{
Low Heat
525{
0---0.50
525 490 475 455 430
{{
Medium Heat
705{
0---0.50
685 655 660 660 660
High Heat
1470{
0 --- 1 . 0
1470 1470 1470 1470 1470 1470 1455 1450 1435 1420
{{
2 --- To n A / C C o o l in g
700
0---0.50}
670 640 635 630 630
{{
2 --- 1 / 2 --- To n A/ C C o o l i n g
875
0---0.50}
870 875 865 865 865
3 --- To n A / C C o o l in g
1050
0 --- 1 . 0 }
1050 1045 1040 1045 1045 1050 1050 1050 1045 1040
3 --- 1 / 2 --- To n A/ C C o o l i n g
1225
0 --- 1 . 0 }
1225 1225 1225 1225 1225 1225 1225 1225 1225 1225
4 --- To n A / C C o o l in g
1400
0 --- 1 . 0 }
1330 1345 1360 1375 1380 1380 1380 1370 1365 1355
5 --- To n A / C C o o l in g
1750
0 --- 1 . 0
1750 1750 1750 1750 1750 1750 1745 1725 1700 1685
Maximum
2000
0 --- 1 . 0
2000 2000 2000 2000 1975 1955 1920 1870 1820 1770
100--- 20***
{{
Low Heat
660{
0---0.50
660 660 655 655 655
{{
Medium Heat
890{
0---0.50
875 890 890 890 890
High Heat
1510{
0 --- 1 . 0
1510 1510 1510 1510 1510 1500 1490 1480 1470 1455
{{
2 --- To n A / C C o o l in g
700
0---0.50}
700 690 690 690 690
{{
2 --- 1 / 2 --- To n A/ C C o o l i n g
875
0---0.50}
835 845 855 860 865
3 --- To n A / C C o o l in g
1050
0 --- 1 . 0 }
1050 1050 1050 1050 1050 1050 1050 1050 1050 1050
3 --- 1 / 2 --- To n A/ C C o o l i n g
1225
0 --- 1 . 0 }
1170 1190 1205 1220 1225 1225 1225 1225 1225 1225
4 --- To n A / C C o o l in g
1400
0 --- 1 . 0 }
1400 1400 1400 1400 1400 1400 1400 1400 1400 1375
5 --- To n A / C C o o l in g
1750
0 --- 1 . 0
1735 1740 1735 1735 1725 1720 1710 1695 1680 1660
Maximum
2000
0 --- 1 . 0
1995 1985 1980 1965 1950 1935 1910 1885 1860 1815
120--- 20
Low Heat
890{
0 --- 1 . 0
890 890 890 880 885 890 885 885 875 860
Medium Heat
1130{
0 --- 1 . 0
1095 1110 1120 1130 1125 1130 1130 1115 1110 1105
High Heat
1900{
0 --- 1 . 0
1900 1900 1900 1900 1900 1885 1875 1860 1840 1815
{{
2 --- To n A / C C o o l in g
700
0---0.50}
700 700 700 700 695
{{
2 --- 1 / 2 --- To n A/ C C o o l i n g
875
0---0.50}
870 875 875 865 870
3 --- To n A / C C o o l in g
1050
0 --- 1 . 0 }
1025 1035 1045 1050 1050 1050 1050 1050 1040 1025
3 --- 1 / 2 --- To n A/ C C o o l i n g
1225
0 --- 1 . 0 }
1210 1210 1210 1225 1225 1225 1225 1225 1225 1225
4 --- To n A / C C o o l in g
1400
0 --- 1 . 0 }
1385 1400 1400 1400 1400 1400 1400 1395 1375 1370
5 --- To n A / C C o o l in g
1750
0 --- 1 . 0 }
1745 1730 1735 1735 1740 1735 1730 1725 1710 1685
6 --- To n A / C C o o l in g
2100
0 --- 1 . 0
2100 2100 2080 2065 2060 2045 2030 2000 1960 1895
Maximum
2100
0 --- 1 . 0
2100 2100 2080 2065 2060 2045 2030 2000 1960 1895
*Actual external static pressure (ESP) can be determined by using the fan laws (CFM
2
proportional to ES P); such as, a system with 1750 CFM a t 0.5 ESP would
operate at h igh---heating airflow of 1470 CFM at 0.35 ESP, medium ---heating airflow of 705 CFM at 0.08 ESP and low---heating airflow of 525 CFM at 0.05 ESP.
{All heating CFM’s are when low/medium heat rise adjustment switch (SW1---3) and comfort/efficiency adjustment switch (SW1--- 4) are OFF.
}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.
***All airflows on 21” casing size furnaces are 5% less on side return only installations.
C o m b u s t i o n --- a i r P i p e f o r N o n --- D i r e c t ( 1 --- P i p e ) V e n t A p p l i c a t i o n ( S i z e s 0 4 0 t h r o u g h 1 2 0 o n l y )
58MVC