Lennox SL280UHNV Series Unit Information page 18

BLOWER DATA
SL280UH080NV48B 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
+ 625
Factory Default 590
– 540
SL280UH080NV60C BLOWER PERFORMANCE (less filter)
BOTTOM RETURN AIR, RETURN AIR FROM BOTH SIDES OR RETURN AIR FROM BOTTOM AND ONE SIDE
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
+ 1080
Factory Default 975
– 880
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 for 08048B and 450cfm for 08060C
®
First Stage Heating Speed - cfm
1300
1230
1145
1215
1015
1050
860
750
First Stage Cooling Speed - cfm
Medium-Low Medium-High
835 1000
760 910
655 800
First Stage Heating Speed - cfm
1375
1330
1260
1185
1130
1050
980
940
First Stage Cooling Speed - cfm
Medium-Low Medium-High
1235 1410
1125 1290
1010 1165
HEATING
Second Stage Heating Speed - cfm
COOLING
Second Stage Cooling Speed - cfm
High Low
2
1190 1000
1070 910
940 760
HEATING
Second Stage Heating Speed - cfm
COOLING
Second Stage Cooling Speed - cfm
High Low
2
1655 1540
1500 1390
1360 1265
Page 18
1445
1355
1300
1225
1150
1070
1000
935
Medium-Low Medium-High
1280 1500
1180 1360
1040 1230
1530
1450
1390
1315
1235
1165
1090
1020
Medium-Low Medium-High
1745 2000
1595 1815
1440 1630
High
2
1715
1560
1380
High
2
2300
2130
1930