Lennox SL280UHNV Series Unit Information page 17

BLOWER DATA
SL280UH080NV48B BLOWER PERFORMANCE (less filter)
BOTTOM RETURN AIR
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
+ 640
Factory Default 590
– 545
SL280UH080NV48B BLOWER PERFORMANCE (less filter)
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 Speed
1
DIP Switch
Settings
+24%
+18%
+12%
+6%
Factory Default
–6%
–12%
–18%
Cooling Speed
1
DIP Switch
Low
Settings
+ 600
Factory Default 560
– 540
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.
1
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 380 cfm.
Lennox iHarmony Zoning System Applications - Minimum blower speed is 380 cfm.
®
First Stage Heating Speed - cfm
1350
1270
1200
1130
1060
970
880
845
First Stage Cooling Speed - cfm
Medium-Low Medium-High
870 1030
770 925
635 750
First Stage Heating Speed - cfm
1245
1180
1130
1045
1095
1020
825
840
First Stage Cooling Speed - cfm
Medium-Low Medium-High
810 995
705 855
585 750
HEATING
Second Stage Heating Speed - cfm
COOLING
Second Stage Cooling Speed - cfm
High Low
2
1200 1020
1100 935
960 815
HEATING
Second Stage Heating Speed - cfm
COOLING
Second Stage Cooling Speed - cfm
High Low
2
1165 995
1050 905
910 735
Page 17
1500
1420
1340
1270
1190
1130
1025
950
Medium-Low Medium-High
1310 1535
1200 1400
1080 1260
1385
1320
1245
1185
1120
1050
975
865
Medium-Low Medium-High
1265 1490
1140 1350
1010 1200
High
2
1750
1600
1430
High
2
1680
1525
1365