Lennox International Inc SL280UH090V36B, SL280UH090V48B Blower Data, Heating, Cooling

BLOWER DATA

SL280UH110V60C 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%		1635				1800
+18%		1555				1710
+12%		1475				1625
+6%		1395				1535
Factory Default		1320				1450
–6%		1240				1365
–12%		1160				1275
–18%		1080				1190
			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
+	1085	1160	1270	1490	1595		1660	1840	2115
Factory Default	1010	1040	1160	1375	1470		1535	1655	1940
–	900	955	1025	1205	1315		1365	1510	1735

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.

Page 46