Lennox SIGNATURE SL280UHV Installation Instructions Manual page 45

BLOWER DATA
SL280UH110V60C 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
+ 1060
Factory Default 970
– 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
+ 1020
Factory Default 940
– 835
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
1690
1605
1525
1445
1360
1280
1200
1115
First Stage Cooling Speed - cfm
Medium-Low Medium-High
1220 1330
1075 1180
980 1070
First Stage Heating Speed - cfm
1640
1560
1480
1400
1325
1245
1165
1085
First Stage Cooling Speed - cfm
Medium-Low Medium-High
1160 1285
1050 1155
945 1020
HEATING
Second Stage Heating Speed - cfm
COOLING
Second Stage Cooling Speed - cfm
High Low Medium-Low
2
1565 1535
1430 1400
1255 1260
HEATING
Second Stage Heating Speed - cfm
COOLING
Second Stage Cooling Speed - cfm
High Low
2
1550 1505
1400 1375
1250 1235
Page 45
1855
1765
1675
1585
1495
1405
1315
1230
Medium-High
1710 1910
1565 1715
1400 1560
1805
1715
1630
1545
1455
1370
1280
1195
Medium-Low Medium-High
1690 1855
1525 1685
1380 1505
High
2
2210
2015
1815
High
2
2125
1935
1730