Lennox SL280UHNV Series

Page 20
BLOWER DATA
SL280UH100NV60C BLOWER PERFORMANCE (less fi lter)
BOTTOM RETURN AIR, RETURN AIR FROM BOTH SIDES OR RETURN AIR FROM BOTTOM AND ONE SIDE
0 through 0.8 in. w.g. (Heating) and 0 through 1.0 in. w.g. (Cooling) External Static Pressure Range
HEATING
1
Heating Speed
DIP Switch
Settings
First Stage Heating Speed - cfm Second Stage Heating Speed - cfm
+24% 1745 1930
+18% 1670 1825
+12% 1580 1740
+6% 1500 1655
Factory Default 1425 1565
–6% 1310 1470
–12% 1260 1390
–18% 1190 1300
COOLING
1
Cooling Speed
DIP Switch
Settings
First Stage Cooling Speed - cfm Second Stage Cooling Speed - cfm
Low Medium-Low Medium-High
2
High Low Medium-Low Medium-High
2
High
+ 1200 1250 1380 1585 1710 1790 1950 2270
Factory Default 1075 1150 1275 1460 1570 1610 1785 2065
– 1010 1050 1150 1320 1410 1480 1625 1880
SL280UH100NV60C BLOWER PERFORMANCE (less fi lter)
Single Side Return Air - Air volumes in bold require Optional Return Air base and fi eld fabricated transition to accommodate 20 x
25 x 1 in. air fi lter in order to maintain proper air velocity.
0 through 0.8 in. w.g. (Heating) and 0 through 1.0 in. w.g. (Cooling) External Static Pressure Range
HEATING
1
Heating Speed
DIP Switch
Settings
First Stage Heating Speed - cfm Second Stage Heating Speed - cfm
+24% 1600 1785
+18% 1530 1685
+12% 1440 1600
+6% 1370 1515
Factory Default 1290 1415
–6% 1260 1390
–12% 1175 1290
–18% 1065 1190
COOLING
1
Cooling Speed
DIP Switch
Settings
First Stage Cooling Speed - cfm Second Stage Cooling Speed - cfm
Low Medium-Low Medium-High
2
High Low Medium-Low Medium-High
2
High
+ 1140 1180 1300 1480 1615 1695 1865 2160
Factory Default 1040 1060 1190 1365 1460 1530 1690 1960
– 930 970 1070 1240 1325 1380 1520 1760
1
Cooling and heating speeds are based on a combination of DIP switch settings on the furnace control. Refer to Installation Instructions for specifi c DIP Switch Settings.
2
Factory default setting.
NOTES - The effect of static pressure is included in air volumes shown.
First stage HEAT is approximately 91% of the same second stage HEAT.
First stage COOL (two-stage air conditioning units only) is approximately 70% of the same second stage COOL speed position.
Continuous Fan Only speed is selectable at 28%, 38%, 70% and 100% of the selected second stage cooling speed - minimum 450 cfm.
Lennox iHarmony
®
Zoning System Applications - Minimum blower speed is 450 cfm.