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

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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