Lennox SIGNATURE SL280UHV Installation Instructions Manual page 42

BLOWER DATA
SL280UH090V48B 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 Speed
1
DIP Switch
Settings
+24%
+18%
+12%
+6%
Factory Default
–6%
–12%
–18%
Cooling Speed
1
DIP Switch
Low
Settings
+ 660
Factory Default 600
– 535
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
1
Settings.
Factory default setting.
2
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 455 cfm.
First Stage Heating Speed - cfm
1295
1235
1170
1110
1045
980
920
855
First Stage Cooling Speed - cfm
Medium-Low Medium-High
905 1030
760 930
700 850
HEATING
Second Stage Heating Speed - cfm
COOLING
Second Stage Cooling Speed - cfm
High Low
2
1175 985
1045 905
970 815
Page 42
1425
1355
1290
1220
1150
1080
1010
945
Medium-Low Medium-High
1290 1495
1125 1345
1040 1225
High
2
1675
1525
1385