Lennox International Inc SL280UH070V36A, SL280UH090V48B, SL280UH090V36B +18% 1605

BLOWER DATA

SL280UH110V60C BLOWER PERFORMANCE (less filter)

BOTTOM RETURN AIR, RETURN AIR FROM BOTH SIDES OR RETURN AIR FROM BOTTOM AND ONE SIDE 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%		1690				1855
+18%		1605				1765
+12%		1525				1675
+6%		1445				1585
Factory Default		1360				1495
–6%		1280				1405
–12%		1200				1315
–18%		1115				1230
			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
+	1060	1220	1330	1565	1535		1710	1910	2210
Factory Default	970	1075	1180	1430	1400		1565	1715	2015
–	875	980	1070	1255	1260		1400	1560	1815

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%		1640				1805
+18%		1560				1715
+12%		1480				1630
+6%		1400				1545
Factory Default		1325				1455
–6%		1245				1370
–12%		1165				1280
–18%		1085				1195
			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
+	1020	1160	1285	1550	1505		1690	1855	2125
Factory Default	940	1050	1155	1400	1375		1525	1685	1935
–	835	945	1020	1250	1235		1380	1505	1730

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 485 cfm.

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