Lennox SL280UHNV - Page 7

Page 7
BLOWER DATA -05 and Later Models
SL280UH080NV48B BLOWER PERFORMANCE (less lter)
SIDE RETURN AIR
0 through 1.0 in. w.g. External Static Pressure Range
HEATING
1
Heating Speed
DIP Switch Settings
First Stage Heating Speed - cfm Second Stage Heating Speed - cfm
+24% 1290 1400
+18% 1215 1325
+12% 1145 1255
+6% 1075 1190
Factory Default 1000 1120
–6% 940 1050
–12% 875 970
–18% 800 890
COOLING
1
Cooling Speed
DIP Switch Settings
First Stage Cooling Speed - cfm Second Stage Cooling Speed - cfm
Low Medium-Low Medium-High
2
High Low Medium-Low Medium-High
2
High
+ 660 885 1005 1180 980 1250 1455 1660
Factory Default 565 785 920 1055 870 1125 1310 1500
– 540 700 815 945 780 1005 1185 1375
1
Cooling and heating speeds are based on a combination of DIP switch settings on the furnace control. Refer to Installation Instructions for specic DIP Switch Settings.
2
Factory default setting.
NOTES - The e󰀨ect 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% and 38% of the selected second stage cooling speed - minimum 380 cfm.
Lennox
®
Smart Zoning System Applications - Minimum blower speed is 380 cfm.
SL280UH080NV60C BLOWER PERFORMANCE (less lter)
BOTTOM RETURN AIR
0 through 1.0 in. w.g. External Static Pressure Range
HEATING
1
Heating Speed
DIP Switch Settings
First Stage Heating Speed - cfm Second Stage Heating Speed - cfm
+24% 1330 1455
+18% 1260 1385
+12% 1210 1320
+6% 1135 1250
Factory Default 1070 1165
–6% 1005 1100
–12% 930 1025
–18% 865 955
COOLING
1
Cooling Speed
DIP Switch Settings
First Stage Cooling Speed - cfm Second Stage Cooling Speed - cfm
Low Medium-Low Medium-High
2
High Low Medium-Low Medium-High
2
High
+ 1040 1170 1335 1590 1470 1640 1870 2205
Factory Default 945 1065 1230 1440 1340 1495 1715 1985
– 830 955 1105 1300 1205 1340 1545 1790
1
Cooling and heating speeds are based on a combination of DIP switch settings on the furnace control. Refer to Installation Instructions for specic DIP Switch Settings.
2
Factory default setting.
NOTES - The e󰀨ect 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% and 38% of the selected second stage cooling speed - minimum 450 cfm.
Lennox
®
Smart Zoning System Applications - Minimum blower speed is 450 cfm.