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BLOWER DATA
SL280UH090V60C BLOWER PERFORMANCE (less 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% 1420 1565
+18% 1355 1490
+12% 1285 1415
+6% 1215 1335
Factory Default 1145 1260
–6% 1080 1185
–12% 1010 1110
–18% 940 1035
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
+ 1110 1205 1420 1680 1575 1740 2000 2305
Factory Default 1005 1100 1280 1545 1440 1595 1820 2125
– 890 1015 1125 1380 1295 1450 1610 1930
SINGLE SIDE RETURN AIR
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% 1360 1500
+18% 1295 1425
+12% 1230 1355
+6% 1165 1280
Factory Default 1100 1210
–6% 1030 1135
–12% 965 1065
–18% 900 990
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
+ 1050 1165 1335 1620 1515 1680 1915 2225
Factory Default 955 1060 1215 1480 1390 1545 1735 2060
– 840 945 1090 1290 1220 1385 1580 1825
1
Cooling and heating speeds are based on a combination of DIP switch settings on the furnace control. Refer to Installation Instructions for specic 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 480 cfm.