Lennox SIGNATURE SL280UHV Installation Instructions Manual page 43

BLOWER DATA
SL280UH090V60C 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
+ 1110
Factory Default 1005
– 890
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
+ 1050
Factory Default 955
– 840
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 480 cfm.
First Stage Heating Speed - cfm
1420
1355
1285
1215
1145
1080
1010
940
First Stage Cooling Speed - cfm
Medium-Low Medium-High
1205 1420
1100 1280
1015 1125
First Stage Heating Speed - cfm
1360
1295
1230
1165
1100
1030
965
900
First Stage Cooling Speed - cfm
Medium-Low Medium-High
1165 1335
1060 1215
945 1090
HEATING
Second Stage Heating Speed - cfm
COOLING
Second Stage Cooling Speed - cfm
High Low Medium-Low
2
1680 1575
1545 1440
1380 1295
HEATING
Second Stage Heating Speed - cfm
COOLING
Second Stage Cooling Speed - cfm
High Low Medium-Low
2
1620 1515
1480 1390
1290 1220
Page 43
1565
1490
1415
1335
1260
1185
1110
1035
Medium-High
1740 2000
1595 1820
1450 1610
1500
1425
1355
1280
1210
1135
1065
990
Medium-High
1680 1915
1545 1735
1385 1580
High
2
2305
2125
1930
High
2
2225
2060
1825