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BLOWER DATA
SL280UH135V60D BLOWER PERFORMANCE (less filter)
BOTTOM RETURN AIR, RETURN AIR FROM BOTH SIDES OR RETURN AIR FROM BOTTOM AND ONE SIDE
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
+
1025
Factory Default
965
–
875
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
72
Med-Low 80
108 137 164 194 224 252 280 308 214 249 291 340 384 422 450 493 530 579 619
Cooling
Speed
Med-High 119 154 180 227 259 298 328 363 392 309 359 404 464 509 560 622 661 715 757 809
High
239 271 320 370 394 439 477 513 559 655 683 774 832 888 957 1022 1053 1122 1161 1206
Factory Default
Low
52
Med-Low 63
Cooling
Speed
Med-High 86
115 152 174 203 236 270 298 328 227 266 333 369 373 405 445 541 579 601 642
High
160 194 229 278 318 359 394 429 455 468 521 580 647 716 763 819 872 934 994 1053
– Setting
Low
45
Med-Low 50
Cooling
Speed
Med-High 71
High
127 160 196 232 265 299 334 369 403 294 343 402 457 510 576 619 673 720 781 835
First Stage Heating Speed - cfm
1875
1785
1695
1605
1515
1425
1330
1240
First Stage Cooling Speed - cfm
Medium-Low
Medium-High
1120
1015
930
Motor Watts @ Various External Static Pressures - in. wg.
First Stage
0.2
0.3
0.4
0.5
99
123 145 177 204 228 253 277 180 208 244 299 334 374 408 432 478 511 539
79
95
120 147 167 188 215 238 127 161 197 238 277 316 349 386 412 457 493
87
116 137 158 188 210 239 262 160 194 229 280 317 350 395 431 451 502 540
65
87
107 128 152 170 191 210 103 133 167 199 235 268 294 325 366 391 425
70
95
120 140 166 185 208 228 109 143 178 213 247 283 320 359 380 421 455
97
123 147 175 204 228 254 279 171 203 235 294 328 370 401 439 478 515 543
HEATING
COOLING
High
Low
2
1325
1650
1500
1180
1490
1420
1060
1350
1225
0.6
0.7
0.8
0
0.1
Page 14
Second Stage Heating Speed - cfm
2065
1965
1865
1765
1665
1565
1465
1365
Second Stage Cooling Speed - cfm
Medium-Low
Medium-High
1600
1510
1320
Second Stage
0.2
0.3
0.4
0.5
0.6
High
2
1840
2235
1700
2110
1505
1840
0.7
0.8
0.9
1.0
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