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BLOWER DATA
SL280UH090V48B 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 Speed
1
DIP Switch
Settings
+24%
+18%
+12%
+6%
Factory Default
–6%
–12%
–18%
Cooling Speed
1
DIP Switch
Low
Settings
+
660
Factory Default
600
–
535
Cooling 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.
1
Factory default setting.
2
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% and 38% of the selected second stage cooling speed - minimum 380 cfm.
Lennox iHarmony
Zoning System Applications - Minimum blower speed is 380 cfm.
®
SL280UH090V48B BLOWER MOTOR WATTS (COOLING)
Cooling Speed
1
DIP Switch
Settings
0
0.1
+ Setting
Low
34
Med-Low 57
Cooling
Speed
Med-High 76
102 125 147 174 200 223 248 272 208 238 279 319 350 391 422 457 489 529 564
High
106 134 165 193 224 259 283 313 340 302 346 386 426 470 510 554 596 640 680 722
Factory Default
Low
31
Med-Low 43
Cooling
Speed
Med-High 62
High
81
113 131 151 187 211 238 264 291 235 263 312 349 387 426 455 489 522 568 608
– Setting
Low
29
Med-Low 32
Cooling
Speed
Med-High 46
High
69
First Stage Heating Speed - cfm
1295
1235
1170
1110
1045
980
920
855
First Stage Cooling Speed - cfm
Medium-Low
Medium-High
905
760
700
Motor Watts @ Various External Static Pressures - in. wg.
First Stage
0.2
0.3
0.4
0.5
54
65
84
101 122 138 156 169
74
97
120 137 158 177 197 216 124 160 189 216 254 287 319 351 385 416 449
47
59
74
89
105 123 139 150
61
82
101 118 144 158 177 194
85
104 130 151 173 196 216 239 150 180 219 250 294 333 368 399 428 463 497
40
53
69
83
93
50
66
84
101 116 136 153 172
65
86
109 127 146 167 187 207 105 135 166 195 227 262 289 319 348 380 411
92
112 134 156 175 200 221 245 161 195 230 264 298 334 367 401 434 469 503
HEATING
COOLING
High
Low
2
1030
1175
985
930
1045
905
850
970
815
0.6
0.7
0.8
0
0.1
75
104 128 146 170 193 224 244 266 300 326
64
88
94
123 150 183 213 243 279 300 331 353 393
104 122 129
50
69
78
105 126 146 174 199 223 247 272 295 319
Page 9
Second Stage Heating Speed - cfm
1425
1355
1290
1220
1150
1080
1010
945
Second Stage Cooling Speed - cfm
Medium-Low
Medium-High
1290
1125
1040
Second Stage
0.2
0.3
0.4
0.5
0.6
107 131 150 173 196 217 241 263 285
85
107 127 149 169 187 201 222 237
High
2
1495
1675
1345
1525
1225
1385
0.7
0.8
0.9
1.0
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