Lennox SL280UHV series Unit Information

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BLOWER DATA
SL280UH135V60D BLOWER PERFORMANCE (less lter)
SINGLE SIDE RETURN AIR − Air volumes in bold require Optional Return Air Base and eld fabricated transition to accommodate
20 x 25 x 1 in. air lter 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
1
Heating Speed
DIP Switch
Settings
First Stage Heating Speed - cfm Second Stage Heating Speed - cfm
+24% 1850 2035
+18% 1760 1935
+12% 1670 1835
+6% 1580 1740
Factory Default 1490 1640
–6% 1400 1540
–12% 1310 1445
–18% 1225 1345
COOLING
1
Cooling Speed
DIP Switch
Settings
First Stage Cooling Speed - cfm Second Stage Cooling Speed - cfm
Low Medium-Low Medium-High
2
High Low Medium-Low Medium-High
2
High
+ 1030 1105 1305 1635 1525 1600 1840 2255
Factory Default 960 1005 1175 1480 1355 1435 1635 2035
– 845 925 1050 1340 1240 1315 1520 1850
1
Cooling and heating speeds are based on a combination of DIP switch settings on the furnace control. Refer to Installation Instructions for specic DIP Switch Settings.
2
Factory default setting.
NOTES - The e󰀨ect 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)
1
Cooling Speed
DIP Switch
Settings
Motor Watts @ Various External Static Pressures - in. wg.
First Stage Second Stage
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
+ Setting
Cooling
Speed
Low 66 97 120 138 165 195 220 245 279 189 220 259 298 333 378 410 441 486 517 543
Med-Low 82 111 140 161 190 218 255 269 306 224 255 298 354 389 422 455 499 549 571 616
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
Cooling
Speed
Low 49 76 97 121 146 170 198 223 246 130 166 200 238 281 318 350 398 425 462 490
Med-Low 58 89 109 130 161 193 221 238 267 163 185 240 290 318 347 398 432 460 500 538
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
Cooling
Speed
Low 41 60 86 104 129 149 169 190 212 94 130 161 189 221 259 288 317 355 390 421
Med-Low 50 72 96 120 139 160 184 201 235 114 147 177 211 256 290 330 354 385 422 453
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

Lennox SL280UHV series Specifications

General

Brand	Lennox
Model	SL280UHV series
Category	Furnace
Language	English