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BLOWER DATA
SL280UH090V48B BLOWER PERFORMANCE (less filter)
BOTTOM RETURN AIR
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
+
670
Factory Default
605
–
525
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
40
Med-Low 64
Cooling
Speed
Med-High 93
119 141 163 189 213 237 261 286 259 287 321 374 410 451 481 518 555 581 611
High
128 156 188 219 248 281 308 338 366 372 407 465 493 558 604 661 706 726 764 817
Factory Default
Low
35
Med-Low 50
Cooling
Speed
Med-High 75
High
98
122 149 180 194 230 252 278 300 288 321 372 398 433 470 507 554 598 623 653
– Setting
Low
32
Med-Low 43
Cooling
Speed
Med-High 55
High
80
100 123 147 166 187 210 231 253 204 235 269 312 342 376 425 450 482 516 546
First Stage Heating Speed - cfm
1280
1220
1155
1095
1035
970
910
845
First Stage Cooling Speed - cfm
Medium-Low
Medium-High
890
815
690
Motor Watts @ Various External Static Pressures - in. wg.
First Stage
0.2
0.3
0.4
0.5
56
75
86
105 128 141 157 173
86
105 122 146 169 187 207 227 167 196 240 262 299 328 367 398 433 467 492
51
64
79
92
107 122 138 159
65
85
114 130 148 173 179 200 112 142 173 206 234 271 300 323 356 395 419
98
117 136 159 177 187 207 244 189 221 254 289 335 362 400 431 458 504 526
44
57
71
82
95
60
76
91
109 127 143 159 176
70
94
116 132 157 171 190 206 138 170 194 226 269 295 325 357 384 414 442
HEATING
COOLING
High
Low
2
1040
1210
1030
965
1090
940
850
985
795
0.6
0.7
0.8
0
0.1
93
125 144 161 182 209 237 258 286 307 338
81
105 122 139 159 186 200 221 247 263 286
107 121 132
74
94
86
119 134 161 185 212 236 257 290 320 342
Page 7
Second Stage Heating Speed - cfm
1410
1340
1270
1205
1135
1070
1000
930
Second Stage Cooling Speed - cfm
Medium-Low
Medium-High
1335
1205
1060
Second Stage
0.2
0.3
0.4
0.5
0.6
112 130 147 174 189 206 226 245 264
High
2
1550
1755
1405
1,600
1260
1435
0.7
0.8
0.9
1.0
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