Lennox SIGNATURE SL280UHV Installation Instructions Manual page 40

BLOWER DATA
SL280UH090V36B 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
+ 616
Factory Default 571
– 489
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
+ 611
Factory Default 575
– 519
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 455 cfm.
First Stage Heating Speed - cfm
1300
1250
1185
1145
1070
1015
970
880
First Stage Cooling Speed - cfm
Medium-Low Medium-High
755 846
698 767
627 681
First Stage Heating Speed - cfm
1305
1250
1195
1135
1070
995
935
870
First Stage Cooling Speed - cfm
Medium-Low Medium-High
731 830
674 748
604 691
HEATING
Second Stage Heating Speed - cfm
COOLING
Second Stage Cooling Speed - cfm
High Low
2
980 1018
886 909
812 834
HEATING
Second Stage Heating Speed - cfm
COOLING
Second Stage Cooling Speed - cfm
High Low
2
971 995
870 889
786 808
Page 40
1420
1335
1285
1240
1170
1100
1035
980
Medium-Low Medium-High
1197 1291
1083 1197
968 1081
1425
1350
1290
1230
1165
1100
1030
960
Medium-Low Medium-High
1160 1274
1075 1160
952 1056
High
2
1399
1284
1179
High
2
1376
1270
1147