Lennox International Inc DAVE LENNOX SIGNATURE COLLECTION GAS FURNACE Blower Data, Heating

BLOWER DATA

SL280DF070V36A BLOWER PERFORMANCE (less filter)

0 through 0.8 in. w.g. (Heating) and 0 through 1.0 in. w.g. (Cooling) External Static Pressure Range

HEATING

1 Heating Speed
DIP Switch		First Stage Heating Speed - cfm				Second Stage Heating Speed - cfm
Settings
+24%		1065				1170
+18%		1010				1115
+12%		960				1055
+6%		910				1000
Factory Default		860				945
–6%		805				885
–12%		755				830
–18%		705				775
			COOLING
1 Cooling Speed		First Stage Cooling Speed - cfm				Second Stage Cooling Speed - cfm
DIP Switch	Low	Medium-Low	Medium-High	2 High	Low		Medium-Low	Medium-High	2 High
Settings
+	745	870	1025	1075	1100		1240	1425	1515
Factory Default	665	780	925	985	1015		1115	1305	1380
–	590	690	815	865	900		1025	1170	1250

1Cooling and heating speeds are based on a combination of DIP switch settings on the furnace control. Refer to Installation Instructions for specific DIP Switch Settings.

2Factory default setting.

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 425 cfm.

SL280DF090V48B BLOWER PERFORMANCE (less filter)

0 through 0.8 in. w.g. (Heating) and 0 through 1.0 in. w.g. (Cooling) External Static Pressure Range

HEATING

1 Heating Speed
DIP Switch		First Stage Heating Speed - cfm				Second Stage Heating Speed - cfm
Settings
+24%		1360				1500
+18%		1285				1415
+12%		1220				1350
+6%		1135				1285
Factory Default		1075				1200
–6%		1030				1110
–12%		960				1050
–18%		890				975
			COOLING
1 Cooling Speed		First Stage Cooling Speed - cfm				Second Stage Cooling Speed - cfm
DIP Switch	Low	Medium-Low	Medium-High	2 High	Low		Medium-Low	Medium-High	2 High
Settings
+	740	905	1040	1220	1085		1330	1545	1730
Factory Default	690	820	950	1110	990		1200	1400	1,595
–	610	745	855	1005	895		1075	1270	1460

1Cooling and heating speeds are based on a combination of DIP switch settings on the furnace control. Refer to Installation Instructions for specific DIP Switch Settings.

2Factory default setting.

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.

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