Lennox SIGNATURE SL280UHV Installation Instructions Manual page 47

BLOWER DATA
SL280UH135V60D 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
+ 1025
Factory Default 965
– 875
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
+ 1030
Factory Default 960
– 845
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 426 cfm.
First Stage Heating Speed - cfm
1875
1785
1695
1605
1515
1425
1330
1240
First Stage Cooling Speed - cfm
Medium-Low Medium-High
1120 1325
1015 1180
930 1060
First Stage Heating Speed - cfm
1850
1760
1670
1580
1490
1400
1310
1225
First Stage Cooling Speed - cfm
Medium-Low Medium-High
1105 1305
1005 1175
925 1050
HEATING
Second Stage Heating Speed - cfm
COOLING
Second Stage Cooling Speed - cfm
High Low Medium-Low
2
1650 1500
1490 1420
1350 1225
HEATING
Second Stage Heating Speed - cfm
COOLING
Second Stage Cooling Speed - cfm
High Low Medium-Low
2
1635 1525
1480 1355
1340 1240
Page 47
2065
1965
1865
1765
1665
1565
1465
1365
Medium-High
1600 1840
1510 1700
1320 1505
2035
1935
1835
1740
1640
1540
1445
1345
Medium-High
1600 1840
1435 1635
1315 1520
High
2
2235
2110
1840
High
2
2255
2035
1850