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BLOWER DATA
SL280UH090V36B BLOWER PERFORMANCE (less filter)
BOTTOM 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
+
616
Factory Default
571
–
489
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
13
Med-Low 27
Cooling
Speed
Med-High 43
High
57
Factory Default
Low
12
Med-Low 22
Cooling
Speed
Med-High 27
High
51
– Setting
Low
9
Med-Low 16
Cooling
Speed
Med-High 22
High
36
First Stage Heating Speed - cfm
1300
1250
1185
1145
1070
1015
970
880
First Stage Cooling Speed - cfm
Medium-Low
Medium-High
755
698
627
Motor Watts @ Various External Static Pressures - in. wg.
First Stage
0.2
0.3
0.4
0.5
29
43
62
73
86
46
64
84
102 119 137 159 177 112 136 157 193 224 247 277 300 321 350 372
59
80
104 119 143 159 178 191 145 163 199 233 264 289 316 345 374 397 417
78
103 125 148 181 202 219 245 190 219 254 273 310 351 377 408 442 467 489
25
42
55
65
86
38
52
70
89
108 121 135 150
46
64
85
103 123 141 157 179 112 136 157 193 224 247 277 300 321 350 372
68
90
110 136 150 172 198 211 145 164 197 232 257 290 320 351 362 396 411
21
35
45
60
74
29
46
64
78
93
40
54
68
90
108 125 141 153
53
72
91
112 131 150 169 185
HEATING
COOLING
High
Low
2
846
980
1018
767
886
909
681
812
834
0.6
0.7
0.8
0
0.1
105 122 137
63
85
93
115 123
51
70
77
99
89
100 119
41
59
106 121 138
58
80
73
94
99
125 154 182 207 234 266 296 320 344 369
Page 5
Second Stage Heating Speed - cfm
1420
1335
1285
1240
1170
1100
1035
980
Second Stage Cooling Speed - cfm
Medium-Low
Medium-High
1197
1083
968
Second Stage
0.2
0.3
0.4
0.5
0.6
105 134 159 186 207 230 252 275 292
97
113 139 155 176 199 221 242 261
129 152 184 206 231 264 283 307 333
80
96
116 136 159 176 195 204 230
104 124 150 175 192 221 238 260 284
125 152 177 203 228 258 279 304 326
High
2
1291
1399
1197
1284
1081
1179
0.7
0.8
0.9
1.0
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