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

BLOWER DATA

SL280UH135V60D BLOWER PERFORMANCE (less filter)

SIDE RETURN AIR WITH OPTIONAL RETURN AIR BASE

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%		1840				2025
+18%		1750				1925
+12%		1660				1830
+6%		1575				1730
Factory Default		1485				1630
–6%		1395				1535
–12%		1305				1435
–18%		1215				1340
			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
+	1035	1105	1285	1610	1530		1610	1825	2240
Factory Default	955	1005	1145	1430	1365		1450	1650	2040
–	860	935	1050	1295	1225		1310	1515	1850

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 495 cfm.

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