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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
1
Heating Speed
DIP Switch
Settings
First Stage Heating Speed - cfm
Second Stage Heating Speed - cfm
+24%
1300
1420
+18%
1250
1335
+12%
1185
1285
+6%
1145
1240
Factory Default
1070
1170
–6%
1015
1100
–12%
970
1035
–18%
880
980
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
+
616
755
846
980
1018
1197
1291
1399
Factory Default
571
698
767
886
909
1083
1197
1284
–
489
627
681
812
834
968
1081
1179
1
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.
2
Factory default setting.
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)
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
13
29
43
62
73
86 105
122
137 63
85 105 134 159 186 207 230 252 275 292
Med-Low 27
46
64
84
102
119 137 159 177
112
136 157 193 224 247 277 300 321 350 372
Med-High 43
59
80
104 119 143 159 178 191 145 163 199 233 264 289 316 345 374 397 417
High
57
78 103 125 148
181 202
219 245 190 219 254 273 310 351 377 408 442 467 489
Factory Default
Cooling
Speed
Low
12
25
42
55
65
86
93 115 123 51
70
97 113 139 155 176 199
221
242 261
Med-Low
22
38
52
70
89
108 121
135 150 77
99 129 152 184 206 231 264 283 307 333
Med-High 27
46
64
85 103 123 141 157 179
112
136 157 193 224 247 277 300 321 350 372
High
51
68
90
110
136 150 172 198
211
145 164 197 232 257 290 320 351 362 396 411
– Setting
Cooling
Speed
Low
9
21
35
45
60
74
89
100
119 41
59
80
96 116 136 159 176 195 204 230
Med-Low 16
29
46
64
78
93 106
121
138 58
80
104 124 150 175 192
221
238 260 284
Med-High
22
40
54
68
90
108
125 141 153 73
94 125 152 177 203
228
258 279 304 326
High
36
53
72
91
112
131 150 169 185 99 125 154
182
207 234 266 296 320 344 369