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BLOWER DATA
SL280UH135V60D BLOWER PERFORMANCE (less filter)
SINGLE SIDE RETURN AIR − Air volumes in bold require Optional Return Air Base and field fabricated transition to accommodate
20 x 25 x 1 in. air filter in order to maintain proper air velocity.
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
+
1030
Factory Default
960
–
845
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 450 cfm.
Lennox iHarmony
Zoning System Applications - Minimum blower speed is 450 cfm.
®
SL280UH135V60D BLOWER MOTOR WATTS (COOLING)
Cooling Speed
1
DIP Switch
Settings
0
0.1
+ Setting
Low
66
Med-Low 82
111 140 161 190 218 255 269 306 224 255 298 354 389 422 455 499 549 571 616
Cooling
Speed
Med-High 114 148 177 218 254 288 320 359 381 317 359 418 459 511 557 615 655 701 747 795
High
233 268 307 357 396 430 475 503 544 668 704 766 831 898 941 995 1048 1103 1144 1176
Factory Default
Low
49
Med-Low 58
Cooling
Speed
Med-High 76
109 135 170 200 231 268 290 324 233 281 333 368 408 456 499 539 591 644 693
High
162 195 230 282 318 356 391 425 457 484 529 603 651 721 783 832 898 951 994 1051
– Setting
Low
41
Med-Low 50
Cooling
Speed
Med-High 73
101 123 147 167 196 221 250 274 177 207 245 291 331 370 413 431 475 509 543
High
118 151 181 231 261 303 327 363 399 328 369 431 477 535 580 638 683 723 777 827
First Stage Heating Speed - cfm
1850
1760
1670
1580
1490
1400
1310
1225
First Stage Cooling Speed - cfm
Medium-Low
Medium-High
1105
1005
925
Motor Watts @ Various External Static Pressures - in. wg.
First Stage
0.2
0.3
0.4
0.5
97
120 138 165 195 220 245 279 189 220 259 298 333 378 410 441 486 517 543
76
97
121 146 170 198 223 246 130 166 200 238 281 318 350 398 425 462 490
89
109 130 161 193 221 238 267 163 185 240 290 318 347 398 432 460 500 538
60
86
104 129 149 169 190 212
72
96
120 139 160 184 201 235 114 147 177 211 256 290 330 354 385 422 453
HEATING
COOLING
High
Low
2
1305
1635
1525
1175
1480
1355
1050
1340
1240
0.6
0.7
0.8
0
0.1
94
130 161 189 221 259 288 317 355 390 421
Page 15
Second Stage Heating Speed - cfm
2035
1935
1835
1740
1640
1540
1445
1345
Second Stage Cooling Speed - cfm
Medium-Low
Medium-High
1600
1435
1315
Second Stage
0.2
0.3
0.4
0.5
0.6
High
2
1840
2255
1635
2035
1850
1520
0.7
0.8
0.9
1.0
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