Lennox International Inc Furnace Performance and Specifications for Lennox Models SL280UH090V48B and SL280UH090V60C

BLOWER DATA

SL280UH090V60C 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%		1420				1565
+18%		1355				1490
+12%		1285				1415
+6%		1215				1335
Factory Default		1145				1260
–6%		1080				1185
–12%		1010				1110
–18%		940				1035
			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
+	1110	1205	1420	1680	1575		1740	2000	2305
Factory Default	1005	1100	1280	1545	1440		1595	1820	2125
–	890	1015	1125	1380	1295		1450	1610	1930

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%		1360				1500
+18%		1295				1425
+12%		1230				1355
+6%		1165				1280
Factory Default		1100				1210
–6%		1030				1135
–12%		965				1065
–18%		900				990
			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
+	1050	1165	1335	1620	1515		1680	1915	2225
Factory Default	955	1060	1215	1480	1390		1545	1735	2060
–	840	945	1090	1290	1220		1385	1580	1825

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 480 cfm.

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