Lennox SIGNATURE SL280UHV Installation Instructions Manual page 48

BLOWER DATA
SL280UH135V60D 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
+ 1035
Factory Default 955
– 860
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 495 cfm.
First Stage Heating Speed - cfm
1840
1750
1660
1575
1485
1395
1305
1215
First Stage Cooling Speed - cfm
Medium-Low Medium-High
1105 1285
1005 1145
935 1050
HEATING
Second Stage Heating Speed - cfm
COOLING
Second Stage Cooling Speed - cfm
High Low
2
1610 1530
1430 1365
1295 1225
Page 48
2025
1925
1830
1730
1630
1535
1435
1340
Medium-Low Medium-High
1610 1825
1450 1650
1310 1515
High
2
2240
2040
1850