Lennox SL280DFNV Series Unit Information page 4

BLOWER DATA
SL280DF080NV60C BLOWER PERFORMANCE (less filter)
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
+ 1090
Factory Default
990
– 890
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% and 38% of the selected second stage cooling speed - minimum 450 cfm.
Lennox Smart Zoning System Applications - Minimum blower speed is 450 cfm.
®
First Stage Heating Speed - cfm
1475
1385
1335
1255
1175
1100
1050
980
First Stage Cooling Speed - cfm
Medium-Low Medium-High
1220 1380
1110 1250
995 1135
HEATING
COOLING
High Low
2
1575 1575
1440 1400
1300 1270
Page 4
Second Stage Heating Speed - cfm
1610
1515
1445
1360
1285
1195
1140
1045
Second Stage Cooling Speed - cfm
Medium-Low Medium-High
1800 2000
1600 1820
1435 1635
High
2
2270
2050
1855