Lennox International Inc SL280UH070V36A, SL280UH090V48B Blower Data, Heating, Cooling

BLOWER DATA

SL280UH090V48B 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

1 Heating Speed
DIP Switch		First Stage Heating Speed - cfm				Second Stage Heating Speed - cfm
Settings
+24%		1280				1410
+18%		1220				1340
+12%		1155				1270
+6%		1095				1205
Factory Default		1035				1135
–6%		970				1070
–12%		910				1000
–18%		845				930
			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
+	670	890	1040	1210	1030		1335	1550	1755
Factory Default	605	815	965	1090	940		1205	1405	1,600
–	525	690	850	985	795		1060	1260	1435

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

1 Heating Speed
DIP Switch		First Stage Heating Speed - cfm				Second Stage Heating Speed - cfm
Settings
+24%		1280				1410
+18%		1220				1340
+12%		1155				1270
+6%		1095				1205
Factory Default		1035				1135
–6%		970				1070
–12%		910				1000
–18%		845				930
			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
+	640	900	1015	1175	1005		1295	1500	1670
Factory Default	570	780	930	1040	895		1160	1345	1500
–	530	700	810	955	795		1050	1210	1405

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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