Lennox SL280UHV Series Unit Information page 6

BLOWER DATA
SL280UH090V36B 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
+ 611
Factory Default 575
– 519
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 250 cfm.
Lennox iHarmony Zoning System Applications - Minimum blower speed is 250 cfm.
®
SL280UH090V36B BLOWER MOTOR WATTS (COOLING)
Cooling Speed
1
DIP Switch
Settings
0 0.1
+ Setting
Low 10
Med-Low 23
Cooling
Speed
Med-High 37
High 54
Factory Default
Low 8
Med-Low 16
Cooling
Speed
Med-High 23
High 43
– Setting
Low 4
Med-Low 11
Cooling
Speed
Med-High 15
High 32
First Stage Heating Speed - cfm
1305
1250
1195
1135
1070
995
935
870
First Stage Cooling Speed - cfm
Medium-Low Medium-High
731
674
604
Motor Watts @ Various External Static Pressures - in. wg.
First Stage
0.2 0.3 0.4 0.5
27 41 57 72 88
44 59 80 99 119 138 158 177 103 129 151 184 214 235 264 290 316 342 368
56 75 95 114 135 153 174 189 147 167 205 230 264 285 317 347 365 394 423
81 95 120 144 170 191 217 234 189 219 249 273 312 339 379 404 431 459 485
24 34 50 70 83
36 50 68 86 106 121 144 159
43 61 81 106 123 144 160 182 103 129 151 184 214 235 264 290 316 342 368
62 88 107 123 145 169 189 209 149 170 199 234 259 291 311 334 367 389 412
18 29 45 59 74
29 44 58 79 93
36 52 67 86 108 126 144 161
53 70 94 109 129 153 174 189
HEATING
COOLING
High Low
2
830 971 995
748 870 889
691 786 808
0.6 0.7 0.8 0 0.1
105 123 135 55 82
96 110 124 39 63
73 92
86 98 113 31 52
111 129 141 50 76
68 89
95 118 144 178 198 226 256 278 302 328 352
Page 6
Second Stage Heating Speed - cfm
1425
1350
1290
1230
1165
1100
1030
960
Second Stage Cooling Speed - cfm
Medium-Low Medium-High
1160
1075
952
Second Stage
0.2 0.3 0.4 0.5 0.6
99 123 148 173 199 220 244 266 290
85 105 131 147 174 193 214 243 264
123 148 173 203 221 249 266 297 317
67 92 113 129 156 175 197 209 232
97 116 141 159 185 206 235 250 282
121 139 167 192 219 243 269 292 310
High
2
1274 1376
1160 1270
1056 1147
0.7 0.8 0.9 1.0