Lennox SIGNATURE SL280UHV Installation Instructions Manual page 46

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 Speed
1
DIP Switch
Settings
+24%
+18%
+12%
+6%
Factory Default
–6%
–12%
–18%
Cooling Speed
1
DIP Switch
Low
Settings
+ 1085
Factory Default 1010
– 900
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 485 cfm.
First Stage Heating Speed - cfm
1635
1555
1475
1395
1320
1240
1160
1080
First Stage Cooling Speed - cfm
Medium-Low Medium-High
1160 1270
1040 1160
955 1025
HEATING
Second Stage Heating Speed - cfm
COOLING
Second Stage Cooling Speed - cfm
High Low
2
1490 1595
1375 1470
1205 1315
Page 46
1800
1710
1625
1535
1450
1365
1275
1190
Medium-Low Medium-High
1660 1840
1535 1655
1365 1510
High
2
2115
1940
1735