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

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

1 Heating Speed
DIP Switch		First Stage Heating Speed - cfm				Second Stage Heating Speed - cfm
Settings
+24%		1300				1420
+18%		1250				1335
+12%		1185				1285
+6%		1145				1240
Factory Default		1070				1170
–6%		1015				1100
–12%		970				1035
–18%		880				980
			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
+	616	755	846	980	1018		1197	1291	1399
Factory Default	571	698	767	886	909		1083	1197	1284
–	489	627	681	812	834		968	1081	1179

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%		1305				1425
+18%		1250				1350
+12%		1195				1290
+6%		1135				1230
Factory Default		1070				1165
–6%		995				1100
–12%		935				1030
–18%		870				960
			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
+	611	731	830	971	995		1160	1274	1376
Factory Default	575	674	748	870	889		1075	1160	1270
–	519	604	691	786	808		952	1056	1147

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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