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BLOWER DATA
SL280UH110V60C BLOWER PERFORMANCE (less filter)
SIDE RETURN AIR WITH OPTIONAL RETURN AIR BASE
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%
1635
1800
+18%
1555
1710
+12%
1475
1625
+6%
1395
1535
Factory Default
1320
1450
–6%
1240
1365
–12%
1160
1275
–18%
1080
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
+
1085
1160
1270
1490
1595
1660
1840
2115
Factory Default
1010
1040
1160
1375
1470
1535
1655
1940
–
900
955
1025
1205
1315
1365
1510
1735
1
Cooling and heating speeds are based on a combination of DIP switch settings on the furnace control. Refer to Installation Instructions for specific 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 500 cfm.
Lennox Harmony III™ Zone Control Applications - Minimum blower speed is 485 cfm.
