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BLOWER DATA
SL280UH090V48B BLOWER PERFORMANCE (less filter)
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 Speed
1
DIP Switch
Settings
+24%
+18%
+12%
+6%
Factory Default
–6%
–12%
–18%
Cooling Speed
1
DIP Switch
Low
Settings
+
640
Factory Default
570
–
530
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 64
Cooling
Speed
Med-High 85
112 135 157 184 208 233 258 284 230 261 305 348 379 421 453 490 523 565 602
High
110 139 172 201 234 270 294 326 352 478 369 414 462 506 547 597 643 691 735 781
Factory Default
Low
30
Med-Low 36
Cooling
Speed
Med-High 64
High
87
118 141 161 194 223 248 275 302 245 273 333 365 396 432 460 503 546 579 635
– Setting
Low
28
Med-Low 37
Cooling
Speed
Med-High 51
High
71
First Stage Heating Speed - cfm
1280
1220
1155
1095
1035
970
910
845
First Stage Cooling Speed - cfm
Medium-Low
Medium-High
900
780
700
Motor Watts @ Various External Static Pressures - in. wg.
First Stage
0.2
0.3
0.4
0.5
54
68
85
102 120 142 159 177
85
105 124 145 166 186 206 227 151 179 214 247 276 312 339 370 399 433 464
46
59
77
87
106 118 143 152
56
76
95
120 136 162 175 196 100 132 163 192 214 244 276 307 338 368 402
88
106 130 149 173 198 222 238 166 192 231 266 303 342 370 410 444 462 493
43
53
70
83
97
56
72
86
106 124 141 158 176
69
90
109 129 152 168 187 205 119 152 182 210 244 276 307 338 370 401 432
94
119 138 158 181 207 233 250 180 211 248 284 316 355 385 419 450 487 521
HEATING
COOLING
High
Low
2
1015
1175
1005
930
1040
895
810
955
795
0.6
0.7
0.8
0
0.1
79
107 133 148 172 201 226 253 274 301 327
70
93
110 120 135
53
72
84
111 134 154 185 215 235 260 284 311 336
Page 8
Second Stage Heating Speed - cfm
1410
1340
1270
1205
1135
1070
1000
930
Second Stage Cooling Speed - cfm
Medium-Low
Medium-High
1295
1160
1050
Second Stage
0.2
0.3
0.4
0.5
0.6
115 134 153 172 195 219 242 260 286
88
112 133 150 175 191 205 230 245
High
2
1500
1670
1345
1500
1210
1405
0.7
0.8
0.9
1.0
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