Lennox EL297UH045XV36B Installation and operation manual

Page 1
UNIT INFORMATIONUNIT INFORMATION
Service Literature
©2016 Lennox Industries, Inc.
WARNING
Improper installation, adjustment, alteration,
service or maintenance can cause property damage,
personal injury or loss of life. Installation and service
must be performed by a licensed professional HVAC
installer (or equivalent), service agency or the gas
supplier.
CAUTION
As with any mechanical equipment, contact with
sharp sheet metal edges can result in personal
injury. Take care while handling this equipment and
wear gloves and protective clothing.
EL297UHV(X) series units are 90% e󰀩ciency gas furnac-
es used for upow or horizontal applications only, man-
ufactured with Lennox Duralok heat exchangers formed
of aluminized steel. EL297UHV(X) units are available in
heating capacities of 44,000 to 132,000 Btuh and cooling
applications up to 5 tons. Refer to Product Specications
Manual for proper sizing.
Units are factory equipped for use with natural gas. Kits
are available for conversion to LPG operation. EL297UH-
V(X) model units are equipped with the icomfort® enabled
SureLight ® two-stage variable speed integrated control.
EL297UHV(X) unit meets the California Nitrogen Oxides
(NOx) Standards and California Seasonal E󰀩ciency re-
quirements. All units use a redundant gas valve to assure
safety shut-o󰀨 as required by C.S.A.
All specications in this manual are subject to change.
Procedures outlined in this manual are presented as a
recommendation only and do not supersede or replace lo-
cal or state codes. In the absence of local or state codes,
the guidelines and procedures outlined in this manual (ex-
cept where noted) are recommendations only and do not
constitute code.
TABLE OF CONTENTS
Specications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 2
Blower CFM Data . . . . . . . . . . . . . . . . . . . . . . . . . Page 5
I Unit Components . . . . . . . . . . . . . . . . . . . . . . . Page 26
II Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 57
III Start Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 79
IV Heating System Service Checks . . . . . . . . . Page 80
V Typical Operating Characteristics . . . . . . . . . Page 83
VI Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . Page 83
VII Wiring and Sequence of Operation . . . . . . Page 86
Program Unit Capacity Size Mode . . . . . . . Page 110
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . Page 111
EL297UHV(X)
100088
Communicating-ENABLED EL297UHV SERIES UNITS

Page 2
SPECIFICATIONS
Gas
Heating
Performance
Model No. EL297UH045XV36B EL297UH070XV36B EL297UH090XV36C
1 AFUE 97% 97% 97%
High
Fire
Input - Btuh 44,000 66,000 88,000
Output - Btuh 43,000 64,000 85,000
Temperature rise range - °F 35 - 65 50 - 80 60 - 90
Gas Manifold Pressure (in. w.g.)
Nat. Gas / LPG/Propane
3.5 / 10.0 3.5 / 10.0 3.5 / 10.0
Low
Fire
Input - Btuh 29,000 43,000 57,000
Output - Btuh 28,000 42,000 56,000
Temperature rise range - °F 20 - 50 25 - 55 30 - 60
Gas Manifold Pressure (in. w.g.)
Nat. Gas / LPG/Propane
1.7 / 4.5 1.7 / 4.5 1.7 / 4.5
High static - in. w.g. Heating 0.8 0.8 0.8
Cooling 1.0 1.0 1.0
Connections
in.
Intake / Exhaust Pipe (PVC) 2 / 2 2 / 2 2 / 2
Gas pipe size IPS 1/2 1/2 1/2
Condensate Drain Trap (PVC pipe) - i.d. 3/4 3/4 3/4
with furnished 90° street elbow 3/4 slip x 3/4 Mipt 3/4 slip x 3/4 Mipt 3/4 slip x 3/4 Mipt
with eld supplied (PVC coupling) - o.d. 3/4 slip x 3/4 MPT 3/4 slip x 3/4 MPT 3/4 slip x 3/4 MPT
Indoor
Blower
Wheel nominal diameter x width - in. 10 x 9 10 x 9 10 x 9
Motor output - hp 1/2 1/2 1/2
Tons of add-on cooling 2 - 3 2 - 3 2 - 3
Air Volume Range - cfm 465 - 1370 490 - 1365 520 - 1360
Electrical Data Voltage 120 volts - 60 hertz - 1 phase
Blower motor full load amps 7.7 7.7 7.7
Maximum overcurrent protection 15 15 15
Shipping Data lbs. - 1 package 130 136 152
NOTE - Filters and provisions for mounting are not furnished and must be eld provided.
1 Annual Fuel Utilization E󰀩ciency based on DOE test procedures and according to FTC labeling regulations. Isolated combustion system rating for non-weatherized
furnaces.
SPECIFICATIONS
Gas
Heating
Performance
Model No. EL297UH090XV48C EL297UH090XV60C EL297UH110XV48C
AHRI Ref. No. 4988513 4988514 4988515
1 AFUE 97% 97% 97%
High
Fire
Input - Btuh 88,000 88,000 110,000
Output - Btuh 86,000 86,000 106,000
Temperature rise range - °F 45 - 75 40 - 70 60 - 90
Gas Manifold Pressure (in. w.g.)
Nat. Gas / LPG/Propane
3.5 / 10.0 3.5 / 10.0 3.5 / 10.0
Low
Fire
Input - Btuh 57,000 57,000 72,000
Output - Btuh 56,000 56,000 70,000
Temperature rise range - °F 30 - 60 25 - 55 35 - 65
Gas Manifold Pressure (in. w.g.)
Nat. Gas / LPG/Propane
1.7 / 4.5 1.7 / 4.5 1.7 / 4.5
High static - in. w.g. Heating 0.8 0.8 0.8
Cooling 1.0 1.0 1.0
Connections
in.
Intake / Exhaust Pipe (PVC) 2 / 2 2 / 2 2 / 2
Gas pipe size IPS 1/2 1/2 1/2
Condensate Drain Trap (PVC pipe) - i.d. 3/4 3/4 3/4
with furnished 90° street elbow 3/4 slip x 3/4 Mipt 3/4 slip x 3/4 Mipt 3/4 slip x 3/4 Mipt
with eld supplied (PVC coupling) - o.d. 3/4 slip x 3/4 MPT 3/4 slip x 3/4 MPT 3/4 slip x 3/4 MPT
Indoor
Blower
Wheel nominal diameter x width - in. 11 x 11 11 x 11 11 x 11
Motor output - hp 3/4 13/4
Tons of add-on cooling 2.5 - 4 3 - 5 2.5 - 4
Air Volume Range - cfm 680 - 1770 840 - 2195 670 - 1760
Electrical Data Voltage 120 volts - 60 hertz - 1 phase
Blower motor full load amps 10.1 12.8 10.1
Maximum overcurrent protection 15 20 15
Shipping Data lbs. - 1 package 163 164 173
NOTE - Filters and provisions for mounting are not furnished and must be eld provided.
1 Annual Fuel Utilization E󰀩ciency based on DOE test procedures and according to FTC labeling regulations. Isolated combustion system rating for non-weatherized
furnaces.

Page 3
SPECIFICATIONS
Gas
Heating
Performance
Model No. EL297UH110XV60C EL297UH135XV60D
1 AFUE 97% 97%
High
Fire
Input - Btuh 110,000 132,000
Output - Btuh 107,000 127,000
Temperature rise range - °F 45 - 75 55 - 85
Gas Manifold Pressure (in. w.g.)
Nat. Gas / LPG/Propane
3.5 / 10.0 3.5 / 10.0
Low
Fire
Input - Btuh 72,000 86,000
Output - Btuh 70,000 84,000
Temperature rise range - °F 35 - 65 40 - 70
Gas Manifold Pressure (in. w.g.)
Nat. Gas / LPG/Propane
1.7 / 4.5 1.7 / 4.5
High static - in. w.g. Heating 0.8 0.8
Cooling 1.0 1.0
Connections
in.
Intake / Exhaust Pipe (PVC) 2 / 2 2 / 2
Gas pipe size IPS 1/2 1/2
Condensate Drain Trap (PVC pipe) - i.d. 3/4 3/4
with furnished 90° street elbow 3/4 slip x 3/4 Mipt 3/4 slip x 3/4 Mipt
with eld supplied (PVC coupling) - o.d. 3/4 slip x 3/4 MPT 3/4 slip x 3/4 MPT
Indoor
Blower
Wheel nominal diameter x width - in. 11 x 11 11 x 11
Motor output - hp 1 1
Tons of add-on cooling 3-5 3-5
Air Volume Range - cfm 850 - 2125 950 - 2250
Electrical Data Voltage 120 volts - 60 hertz - 1 phase
Blower motor full load amps 12.8 12.8
Maximum overcurrent protection 20 20
Shipping Data lbs. - 1 package 174 188
NOTE - Filters and provisions for mounting are not furnished and must be eld provided.
1 Annual Fuel Utilization E󰀩ciency based on DOE test procedures and according to FTC labeling regulations. Isolated combustion system rating for non-weatherized
furnaces.

Page 4
BLOWER DATA
EL297UH045XV36B BLOWER PERFORMANCE (less lter)
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
1Heating Speed
DIP Switch
Settings
First Stage Heating Speed - cfm Second Stage Heating Speed - cfm
+24% 915 1125
+18% 865 1085
+12% 805 1040
+6% 780 985
Factory Default 740 925
–6% 665 875
–12% 630 800
–18% 585 735
COOLING
1Cooling Speed
DIP Switch
Settings
First Stage Cooling Speed - cfm Second Stage Cooling Speed - cfm
Low Medium-Low Medium-High 2High Low Medium-Low Medium-High 2High
[phone] 1075 1210 1370
Factory Default 540 660 785 890 815 980 1120 1255
–485 600 695 790 720 885 1020 1135
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 250 cfm.
Lennox® Smart Zoning System Applications - Minimum blower speed is 250 cfm.
EL297UH045XV36B BLOWER MOTOR WATTS (COOLING)
1Cooling 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 18 33 54 73 88 107 124 144 158 64 87 112 140 171 196 225 243 267 297 317
Med-low 36 58 82 100 120 141 166 182 211 127 138 185 214 237 271 296 326 348 369 390
Med-High 57 86 103 128 159 187 210 233 255 189 219 250 280 305 340 377 411 439 464 483
High 91 114 142 177 217 235 259 285 311 267 281 322 363 400 433 468 502 521 552 549
Factory Default
Cooling
Speed
Low 16 34 52 67 86 98 120 138 155 46 69 91 115 142 167 188 206 232 260 280
Med-low 25 35 65 85 110 125 140 155 180 93 110 138 173 209 230 255 280 304 325 343
Med-High 41 66 87 106 129 154 178 195 223 150 166 206 238 264 293 320 349 376 399 420
High 61 87 110 138 169 194 222 241 265 213 245 269 300 334 368 399 431 460 480 513
– Setting
Cooling
Speed
Low 10 28 40 56 76 89 106 122 137 33 52 78 97 116 132 159 174 202 224 238
Med-low 18 34 55 73 89 108 124 145 159 59 86 104 129 160 187 211 234 256 282 303
Med-High 29 45 72 92 114 129 151 166 193 107 122 157 188 221 247 273 302 324 343 361
High 44 67 89 111 135 160 183 200 227 160 185 214 246 277 302 335 364 391 414 435

Page 5
BLOWER DATA
EL297UH045XV36B BLOWER PERFORMANCE (less lter)
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
1Heating Speed
DIP Switch
Settings
First Stage Heating Speed - cfm Second Stage Heating Speed - cfm
+24% 910 1125
+18% 850 1080
+12% 785 1035
+6% 765 990
Factory Default 755 935
–6% 690 880
–12% 635 810
–18% 600 765
COOLING
1Cooling Speed
DIP Switch
Settings
First Stage Cooling Speed - cfm Second Stage Cooling Speed - cfm
Low Medium-Low Medium-High 2High Low Medium-Low Medium-High 2High
[phone] 1065 1205 1340
Factory Default 550 680 770 880 815 985 1110 1245
–465 610 720 775 745 890 1020 1130
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 250 cfm.
Lennox® Smart Zoning System Applications - Minimum blower speed is 250 cfm.
EL297UH045XV36B BLOWER MOTOR WATTS (COOLING)
1Cooling 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 19 37 57 74 97 116 136 151 168 55 82 104 135 158 194 221 243 270 297 314
Med-low 34 57 80 103 124 148 168 195 216 103 123 159 193 225 254 282 307 338 361 389
Med-High 45 74 98 123 150 179 204 236 260 164 198 225 260 287 326 352 391 428 450 478
High 76 103 133 163 191 223 256 277 303 235 256 294 346 374 409 445 478 510 541 551
Factory Default
Cooling
Speed
Low 16 31 52 67 85 100 118 136 150 38 68 90 106 133 162 188 212 239 262 286
Med-low 20 45 65 85 110 125 145 170 195 75 99 128 159 187 219 251 273 299 323 350
Med-High 38 64 88 106 130 157 180 207 230 125 145 186 216 248 278 303 331 365 388 419
High 51 81 103 133 157 191 218 242 268 182 210 245 273 317 346 376 410 440 465 497
– Setting
Cooling
Speed
Low 10 28 40 59 73 89 105 121 138 30 52 72 100 119 141 159 185 206 228 253
Med-low 20 38 58 75 97 116 136 151 169 48 75 99 124 151 180 205 237 261 285 303
Med-High 27 48 69 93 116 133 152 178 203 85 107 139 172 201 233 266 286 312 337 364
High 38 66 89 106 131 159 184 209 235 134 155 196 223 259 290 316 344 374 399 432

Page 6
BLOWER DATA
EL297UH045XV36B BLOWER PERFORMANCE (less lter)
SINGLE SIDE RETURN AIR WITH OPTIONAL RETURN AIR BASE
0 through 0.8 in. w.g. (Heating) and 0 through 1.0 in. w.g. (Cooling) External Static Pressure Range
HEATING
1Heating Speed
DIP Switch
Settings
First Stage Heating Speed - cfm Second Stage Heating Speed - cfm
+24% 895 1115
+18% 850 1070
+12% 795 1030
+6% 755 980
Factory Default 715 920
–6% 665 850
–12% 645 805
–18% 595 740
COOLING
1Cooling Speed
DIP Switch
Settings
First Stage Cooling Speed - cfm Second Stage Cooling Speed - cfm
Low Medium-Low Medium-High 2High Low Medium-Low Medium-High 2High
[phone] 1060 1185 1345
Factory Default 550 660 760 875 820 975 1105 1215
–490 610 685 770 720 860 1015 1125
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 250 cfm.
Lennox® Smart Zoning System Applications - Minimum blower speed is 250 cfm.
EL297UH045XV36B BLOWER MOTOR WATTS (COOLING)
1Cooling 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 20 36 57 77 99 111 133 149 168 54 82 99 130 157 180 210 238 259 282 308
Med-low 28 50 72 97 118 141 161 184 207 103 122 159 189 220 250 277 303 331 353 382
Med-High 45 74 94 121 148 170 201 221 254 162 188 227 259 283 318 353 383 414 435 473
High 73 98 130 157 186 219 247 274 294 224 249 283 326 366 398 433 473 491 529 545
Factory Default
Cooling
Speed
Low 14 32 47 62 82 100 119 132 149 38 63 82 109 131 161 176 210 231 250 272
Med-low 20 40 60 80 105 120 145 160 180 74 96 125 152 182 214 242 268 289 313 335
Med-High 31 57 76 104 126 153 170 196 223 123 143 180 215 240 272 300 326 359 379 408
High 51 81 98 128 156 178 208 235 258 173 206 240 261 297 337 365 402 431 456 490
– Setting
Cooling
Speed
Low 8 27 38 54 73 88 106 119 137 27 46 71 92 112 133 155 178 195 214 242
Med-low 21 37 57 77 100 112 134 149 169 48 75 95 122 149 171 201 222 255 271 294
Med-High 25 44 67 86 110 127 150 170 187 84 105 139 167 197 229 256 284 305 330 355
High 34 60 79 106 128 157 173 203 227 130 153 188 225 248 282 307 339 371 392 420

Page 7
BLOWER DATA
EL297UH070XV36B BLOWER PERFORMANCE (less lter)
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
1Heating Speed
DIP Switch
Settings
First Stage Heating Speed - cfm Second Stage Heating Speed - cfm
+24% 1095 1220
+18% 1035 1170
+12% 985 1120
+6% 915 1055
Factory Default 850 995
–6% 835 915
–12% 755 845
–18% 695 810
COOLING
1Cooling Speed
DIP Switch
Settings
First Stage Cooling Speed - cfm Second Stage Cooling Speed - cfm
Low Medium-Low Medium-High 2High Low Medium-Low Medium-High 2High
[phone] 1060 1215 1365
Factory Default 555 665 770 855 810 960 1130 1265
–500 600 680 790 705 840 1005 1140
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 250 cfm.
Lennox® Smart Zoning System Applications - Minimum blower speed is 250 cfm.
EL297UH070XV36B BLOWER MOTOR WATTS (COOLING)
1Cooling 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 22 36 51 60 80 95 101 117 138 68 88 105 129 152 169 198 214 231 244 274
Med-low 37 57 75 89 106 127 148 168 182 121 144 168 192 211 243 262 287 305 329 358
Med-High 62 85 97 122 144 164 180 203 220 213 231 259 285 311 328 357 374 397 419 445
High 88 115 132 155 176 203 233 240 274 304 322 359 379 411 442 458 486 502 527 554
Factory Default
Cooling
Speed
Low 16 29 42 55 71 82 98 112 120 52 69 86 107 122 146 165 183 199 212 229
Med-low 26 41 63 79 88 112 128 145 159 89 108 135 151 174 198 223 247 268 288 298
Med-High 39 62 77 96 117 140 156 180 196 151 173 201 225 243 266 289 313 339 368 383
High 65 84 104 125 148 166 178 206 225 237 256 284 303 328 343 374 395 421 435 454
– Setting
Cooling
Speed
Low 11 21 35 53 64 75 82 95 113 34 50 67 86 106 121 141 159 174 186 201
Med-low 21 36 51 66 81 92 107 127 141 64 85 100 114 145 160 182 206 219 237 251
Med-High 35 48 66 82 104 118 137 146 159 101 125 143 171 193 211 242 258 282 304 330
High 43 60 82 100 123 144 159 174 197 161 188 211 229 258 277 307 327 354 379 404

Page 8
BLOWER DATA
EL297UH070XV36B BLOWER PERFORMANCE (less lter)
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
1Heating Speed
DIP Switch
Settings
First Stage Heating Speed - cfm Second Stage Heating Speed - cfm
+24% 1090 1205
+18% 1025 1165
+12% 960 1090
+6% 890 1045
Factory Default 815 975
–6% 755 895
–12% 720 810
–18% 675 750
COOLING
1Cooling Speed
DIP Switch
Settings
First Stage Cooling Speed - cfm Second Stage Cooling Speed - cfm
Low Medium-Low Medium-High 2High Low Medium-Low Medium-High 2High
[phone] 1050 1205 1355
Factory Default 540 640 725 820 750 945 1130 1230
–500 580 665 720 685 805 990 1110
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 250 cfm.
Lennox® Smart Zoning System Applications - Minimum blower speed is 250 cfm.
EL297UH070XV36B BLOWER MOTOR WATTS (COOLING)
1Cooling 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 17 29 48 61 73 94 100 123 130 63 84 104 117 142 160 174 208 215 245 255
Med-low 30 50 66 79 107 128 137 159 178 121 137 165 195 213 239 257 283 303 329 342
Med-High 51 70 92 106 127 150 170 184 207 195 214 243 268 290 324 348 370 387 409 434
High 88 109 134 150 184 201 221 243 265 294 309 344 372 399 421 445 474 495 520 532
Factory Default
Cooling
Speed
Low 12 25 38 52 66 83 96 105 117 43 65 75 98 120 139 152 170 192 212 228
Med-low 22 41 55 70 86 103 123 141 154 88 106 130 150 173 197 220 239 259 276 297
Med-High 36 55 75 90 107 129 152 167 184 142 161 187 211 239 263 287 307 332 352 369
High 57 76 99 116 135 153 176 197 213 220 236 267 294 323 342 364 382 411 436 455
– Setting
Cooling
Speed
Low 8 22 32 50 60 77 86 100 116 31 48 63 83 102 122 137 150 166 188 203
Med-low 19 32 47 63 77 93 103 120 133 53 75 91 111 129 152 169 188 210 227 251
Med-High 25 42 58 74 90 109 131 143 154 101 120 141 170 190 215 233 256 274 298 317
High 37 56 76 95 115 135 153 173 192 157 177 201 224 254 277 303 321 346 362 385

Page 9
BLOWER DATA
EL297UH070XV36B BLOWER PERFORMANCE (less lter)
SINGLE SIDE RETURN AIR WITH OPTIONAL RETURN AIR BASE
0 through 0.8 in. w.g. (Heating) and 0 through 1.0 in. w.g. (Cooling) External Static Pressure Range
HEATING
1Heating Speed
DIP Switch
Settings
First Stage Heating Speed - cfm Second Stage Heating Speed - cfm
+24% 1070 1205
+18% 1020 1150
+12% 955 1100
+6% 895 1035
Factory Default 850 965
–6% 795 905
–12% 745 845
–18% 690 790
COOLING
1Cooling Speed
DIP Switch
Settings
First Stage Cooling Speed - cfm Second Stage Cooling Speed - cfm
Low Medium-Low Medium-High 2High Low Medium-Low Medium-High 2High
[phone] 1045 1205 1350
Factory Default 520 655 755 840 790 945 1090 1255
–490 595 670 745 720 845 985 1130
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 250 cfm.
Lennox® Smart Zoning System Applications - Minimum blower speed is 250 cfm.
EL297UH070XV36B BLOWER MOTOR WATTS (COOLING)
1Cooling 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 18 32 46 61 76 89 104 115 133 64 83 95 120 141 159 175 203 208 234 246
Med-low 34 52 69 86 104 126 141 160 174 109 131 150 179 204 219 239 268 283 313 335
Med-High 63 82 98 115 138 153 173 187 209 177 197 227 246 273 311 328 354 383 402 408
High 88 107 131 148 175 192 217 235 253 261 281 312 346 382 402 430 465 489 506 533
Factory Default
Cooling
Speed
Low 12 25 37 55 66 82 94 105 121 43 61 76 99 121 133 162 169 189 211 224
Med-low 25 40 55 74 89 109 120 136 150 76 96 112 138 162 186 207 232 243 262 281
Med-High 41 61 75 98 115 135 151 173 189 129 150 177 198 227 247 272 301 324 332 369
High 63 86 99 122 139 159 180 204 216 209 227 254 282 298 324 341 364 395 413 428
– Setting
Cooling
Speed
Low 9 20 35 48 59 75 86 94 110 29 43 63 84 99 113 131 144 164 185 197
Med-low 16 32 45 62 75 90 103 119 138 56 71 101 112 131 158 168 184 207 235 245
Med-High 28 43 63 77 98 115 132 145 162 88 107 129 154 183 204 214 245 263 281 308
High 46 61 86 100 121 136 153 172 193 142 163 187 216 236 261 279 301 325 356 375

Page 10
BLOWER DATA
EL297UH090XV36C BLOWER PERFORMANCE (less lter)
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
1Heating Speed
DIP Switch
Settings
First Stage Heating Speed - cfm Second Stage Heating Speed - cfm
+24% 1215 1300
+18% 1140 1240
+12% 1100 1170
+6% 1020 1115
Factory Default 965 1070
–6% 915 970
–12% 850 925
–18% 805 855
COOLING
1Cooling Speed
DIP Switch
Settings
First Stage Cooling Speed - cfm Second Stage Cooling Speed - cfm
Low Medium-Low Medium-High 2High Low Medium-Low Medium-High 2High
[phone] 1040 1210 1360
Factory Default 565 670 760 860 800 945 1100 1245
–520 610 685 785 720 840 970 1115
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 250 cfm.
Lennox® Smart Zoning System Applications - Minimum blower speed is 250 cfm.
EL297UH090XV36C BLOWER MOTOR WATTS (COOLING)
1Cooling 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 19 33 51 67 81 97 113 128 144 47 64 90 111 127 153 174 193 215 234 250
Med-low 35 52 76 90 108 130 146 166 185 87 114 130 158 184 205 227 252 278 301 321
Med-High 51 70 92 117 138 155 181 199 219 146 170 199 223 246 277 303 329 357 379 399
High 69 94 113 133 152 177 194 222 246 225 250 277 308 329 362 391 411 442 465 489
Factory Default
Cooling
Speed
Low 14 31 44 59 75 88 104 125 137 37 54 74 94 114 135 152 175 187 209 223
Med-low 29 46 63 80 95 114 133 146 164 65 87 108 130 152 173 196 222 236 262 283
Med-High 39 56 78 97 117 137 155 175 192 102 127 152 175 202 228 246 279 306 328 345
High 46 68 86 111 126 154 174 194 214 167 184 218 253 272 301 332 360 381 402 421
– Setting
Cooling
Speed
Low 11 27 39 57 70 84 99 113 131 26 45 61 81 96 118 134 152 169 189 205
Med-low 23 39 53 71 87 103 118 133 148 44 60 85 107 127 150 169 186 207 226 247
Med-High 24 43 56 79 97 111 129 149 165 75 101 117 140 160 182 215 235 255 275 296
High 33 51 69 94 111 131 150 170 186 112 134 160 186 220 236 264 293 311 335 363

Page 11
BLOWER DATA
EL297UH090XV36C BLOWER PERFORMANCE (less lter)
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
1Heating Speed
DIP Switch
Settings
First Stage Heating Speed - cfm Second Stage Heating Speed - cfm
+24% 1170 1245
+18% 1125 1190
+12% 1075 1145
+6% 1005 1075
Factory Default 935 1030
–6% 880 950
–12% 810 890
–18% 775 820
COOLING
1Cooling Speed
DIP Switch
Settings
First Stage Cooling Speed - cfm Second Stage Cooling Speed - cfm
Low Medium-Low Medium-High 2High Low Medium-Low Medium-High 2High
[phone] 1015 1165 1300
Factory Default 560 640 715 810 770 910 1050 1190
–525 605 665 725 695 795 945 1110
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 250 cfm.
Lennox® Smart Zoning System Applications - Minimum blower speed is 250 cfm.
EL297UH090XV36C BLOWER MOTOR WATTS (COOLING)
1Cooling 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 30 46 62 75 93 110 129 143 42 60 83 101 122 144 163 181 206 219 241
Med-low 25 45 62 80 96 115 134 151 173 78 104 122 144 170 195 215 239 265 283 308
Med-High 36 55 79 95 117 139 156 178 199 133 154 175 213 236 269 282 309 336 357 381
High 62 83 105 128 148 163 193 210 234 210 229 259 291 317 344 366 391 415 441 466
Factory Default
Cooling
Speed
Low 928 38 55 71 83 100 116 135 28 48 65 86 104 124 142 164 182 199 219
Med-low 20 38 52 69 83 102 120 135 152 59 81 100 125 142 162 182 204 229 248 269
Med-High 26 46 63 83 101 117 141 157 178 95 118 142 165 192 213 244 264 288 314 329
High 39 59 81 98 121 143 161 180 202 149 171 199 229 257 285 306 330 359 389 403
– Setting
Cooling
Speed
Low 8 23 35 52 66 80 95 108 121 21 41 56 71 91 110 126 144 164 179 197
Med-low 12 29 44 59 75 92 111 126 140 35 56 73 95 115 137 155 176 198 216 235
Med-High 20 37 56 71 86 104 122 143 155 70 89 114 135 157 175 199 225 242 266 282
High 27 47 67 82 102 124 142 160 181 104 125 150 178 207 232 251 273 297 321 350

Page 12
BLOWER DATA
EL297UH090XV36C BLOWER PERFORMANCE (less lter)
SINGLE SIDE RETURN AIR WITH OPTIONAL RETURN AIR BASE
0 through 0.8 in. w.g. (Heating) and 0 through 1.0 in. w.g. (Cooling) External Static Pressure Range
HEATING
1Heating Speed
DIP Switch
Settings
First Stage Heating Speed - cfm Second Stage Heating Speed - cfm
+24% 1170 1250
+18% 1110 1200
+12% 1045 1145
+6% 995 1070
Factory Default 940 1010
–6% 880 950
–12% 815 895
–18% 775 825
COOLING
1Cooling Speed
DIP Switch
Settings
First Stage Cooling Speed - cfm Second Stage Cooling Speed - cfm
Low Medium-Low Medium-High 2High Low Medium-Low Medium-High 2High
[phone] 995 1165 1305
Factory Default 570 660 735 820 775 905 1050 1205
–530 600 670 725 710 800 945 1070
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 250 cfm.
Lennox® Smart Zoning System Applications - Minimum blower speed is 250 cfm.
EL297UH090XV36C BLOWER MOTOR WATTS (COOLING)
1Cooling 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 12 29 43 59 75 92 111 123 139 41 62 86 102 123 145 165 185 205 229 253
Med-low 24 42 61 76 97 112 132 150 169 79 108 126 148 174 190 218 248 273 294 316
Med-High 38 56 81 99 115 138 157 176 199 131 152 184 208 237 264 289 320 339 361 390
High 61 85 104 127 144 171 192 212 239 205 226 258 283 312 344 365 393 410 437 466
Factory Default
Cooling
Speed
Low 926 37 54 67 83 97 112 130 30 50 72 87 108 127 149 167 184 209 226
Med-low 19 37 53 67 83 101 119 135 153 62 86 101 129 144 165 189 215 232 251 275
Med-High 27 48 65 82 101 119 139 161 177 91 114 140 163 195 220 239 265 289 315 339
High 42 62 85 99 121 143 162 183 203 149 167 201 228 258 289 316 333 355 389 403
– Setting
Cooling
Speed
Low 8 23 35 51 62 77 91 104 119 25 45 61 75 91 112 131 147 166 184 198
Med-low 13 29 46 60 78 93 110 125 140 40 61 81 103 119 143 162 179 204 220 245
Med-High 22 41 57 70 88 109 127 144 159 70 92 120 133 165 178 203 231 246 274 301
High 29 50 69 83 106 123 143 164 183 101 124 151 180 203 227 257 276 306 326 358

Page 13
BLOWER DATA
EL297UH090XV48C BLOWER PERFORMANCE (less lter)
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
1Heating Speed
DIP Switch
Settings
First Stage Heating Speed - cfm Second Stage Heating Speed - cfm
+24% 1490 1645
+18% 1415 1565
+12% 1330 1480
+6% 1295 1405
Factory Default 1220 1325
–6% 1150 1260
–12% 1065 1190
–18% 1010 1105
COOLING
1Cooling Speed
DIP Switch
Settings
First Stage Cooling Speed - cfm Second Stage Cooling Speed - cfm
Low Medium-Low Medium-High 2High Low Medium-Low Medium-High 2High
[phone] 1165 1375 1580 1770
Factory Default 780 915 1045 1190 1075 1265 1440 1645
–690 835 955 1070 935 1145 1320 1465
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 380 cfm.
Lennox® Smart Zoning System Applications - Minimum blower speed is 380 cfm.
EL297UH090XV48C BLOWER MOTOR WATTS (COOLING)
1Cooling 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 50 67 83 108 127 134 163 175 192 111 132 163 199 222 256 278 310 335 354 384
Med-low 64 91 108 136 168 193 207 234 263 182 212 246 275 317 340 370 407 434 464 503
Med-High 99 127 147 188 213 244 271 301 316 242 273 330 352 415 454 493 534 572 604 646
High 152 179 211 252 275 308 339 370 393 354 386 441 519 550 599 645 678 727 775 817
Factory Default
Cooling
Speed
Low 39 52 72 88 111 118 142 149 169 85 110 134 154 190 218 236 259 298 316 327
Med-low 55 83 96 114 131 167 179 200 227 140 168 189 226 268 289 320 363 381 398 430
Med-High 75 100 132 148 174 212 231 259 280 196 228 271 305 329 370 399 448 475 514 545
High 111 139 167 201 232 258 299 316 343 271 306 362 396 446 506 535 575 617 663 701
– Setting
Cooling
Speed
Low 27 41 59 77 95 101 124 137 156 63 86 103 129 152 179 197 222 241 259 289
Med-low 47 62 84 101 124 139 154 173 191 104 132 149 182 220 242 276 290 316 351 371
Med-High 57 85 103 118 148 165 183 219 242 150 173 205 245 278 318 351 374 411 424 455
High 79 105 135 162 182 220 238 271 296 206 242 284 319 363 385 424 467 520 541 581

Page 14
BLOWER DATA
EL297UH090XV48C BLOWER PERFORMANCE (less lter)
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
1Heating Speed
DIP Switch
Settings
First Stage Heating Speed - cfm Second Stage Heating Speed - cfm
+24% 1400 1570
+18% 1380 1475
+12% 1310 1415
+6% 1255 1360
Factory Default 1210 1285
–6% 1125 1260
–12% 1080 1150
–18% 990 1115
COOLING
1Cooling Speed
DIP Switch
Settings
First Stage Cooling Speed - cfm Second Stage Cooling Speed - cfm
Low Medium-Low Medium-High 2High Low Medium-Low Medium-High 2High
[phone] 1140 1340 1525 1725
Factory Default 755 880 1025 1150 1040 1235 1395 1565
–680 815 925 1065 910 1120 1275 1400
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 380 cfm.
Lennox® Smart Zoning System Applications - Minimum blower speed is 380 cfm.
EL297UH090XV48C BLOWER MOTOR WATTS (COOLING)
1Cooling 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 43 65 85 96 119 134 156 179 199 102 131 155 189 216 249 282 304 331 359 387
Med-low 66 95 113 140 164 189 212 242 268 173 196 242 271 306 337 362 405 430 460 493
Med-High 95 126 151 180 210 242 277 302 320 243 277 316 371 412 457 492 534 566 605 651
High 143 166 203 243 282 309 333 368 389 368 410 453 511 562 604 651 690 730 771 809
Factory Default
Cooling
Speed
Low 36 48 73 86 108 120 140 152 168 75 101 125 156 178 215 244 259 288 320 339
Med-low 52 75 95 110 130 161 176 201 216 129 154 190 218 257 295 322 346 377 404 434
Med-High 70 94 125 146 172 198 230 252 275 190 222 270 299 325 368 398 439 470 508 549
High 100 131 162 197 228 260 298 328 347 275 310 359 400 445 469 525 562 597 642 682
– Setting
Cooling
Speed
Low 32 45 58 80 97 110 121 133 154 62 87 109 129 152 173 199 221 250 266 295
Med-low 45 63 82 99 119 137 150 171 193 95 124 150 180 207 240 269 297 325 356 375
Med-High 55 82 101 119 145 167 192 213 239 148 177 205 244 286 309 346 370 402 431 467
High 76 101 137 160 188 218 245 271 302 198 239 274 308 349 384 426 471 500 542 576

Page 15
BLOWER DATA
EL297UH090XV48C BLOWER PERFORMANCE (less lter)
SINGLE SIDE RETURN AIR WITH OPTIONAL RETURN AIR BASE
0 through 0.8 in. w.g. (Heating) and 0 through 1.0 in. w.g. (Cooling) External Static Pressure Range
HEATING
1Heating Speed
DIP Switch
Settings
First Stage Heating Speed - cfm Second Stage Heating Speed - cfm
+24% 1430 1565
+18% 1400 1500
+12% 1330 1410
+6% 1260 1380
Factory Default 1195 1305
–6% 1135 1275
–12% 1065 1180
–18% 990 1095
COOLING
1Cooling Speed
DIP Switch
Settings
First Stage Cooling Speed - cfm Second Stage Cooling Speed - cfm
Low Medium-Low Medium-High 2High Low Medium-Low Medium-High 2High
[phone] 1160 1360 1530 1740
Factory Default 775 910 1010 1170 1060 1240 1400 1590
–695 815 930 1045 925 1130 1295 1440
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 380 cfm.
Lennox® Smart Zoning System Applications - Minimum blower speed is 380 cfm.
EL297UH090XV48C BLOWER MOTOR WATTS (COOLING)
1Cooling 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 40 60 80 96 115 133 151 176 192 94 127 151 180 207 241 274 303 340 358 381
Med-low 58 87 108 132 158 188 212 240 264 166 195 233 269 300 328 356 394 426 455 496
Med-High 91 126 145 169 205 228 255 288 320 234 273 314 354 403 431 484 514 571 599 632
High 134 163 195 231 264 297 320 359 381 337 378 426 470 518 557 604 654 684 722 768
Factory Default
Cooling
Speed
Low 36 47 70 88 103 120 139 146 167 75 100 130 149 183 212 238 260 293 315 337
Med-low 51 75 93 115 135 158 187 201 222 132 156 192 220 259 284 319 343 376 404 423
Med-High 59 92 112 141 166 200 228 259 281 183 215 262 284 315 348 387 427 464 494 523
High 97 130 156 191 215 256 283 310 343 253 292 331 379 414 462 497 546 575 613 661
– Setting
Cooling
Speed
Low 26 41 55 73 88 104 120 134 149 56 84 104 123 149 174 199 224 248 268 290
Med-low 41 62 79 98 117 132 154 172 195 94 122 146 177 208 239 264 295 320 352 368
Med-High 50 75 95 120 147 164 187 209 243 140 170 197 234 263 301 327 357 377 412 453
High 72 102 125 154 178 208 234 262 293 196 235 264 302 332 377 413 441 482 518 548

Page 16
BLOWER DATA
EL297UH090XV60C BLOWER PERFORMANCE (less lter)
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
1Heating Speed
DIP Switch
Settings
First Stage Heating Speed - cfm Second Stage Heating Speed - cfm
+24% 1490 1985
+18% 1435 1915
+12% 1335 1805
+6% 1280 1645
Factory Default 1185 1625
–6% 1095 1530
–12% 990 1450
–18% 900 1345
COOLING
1Cooling Speed
DIP Switch
Settings
First Stage Cooling Speed - cfm Second Stage Cooling Speed - cfm
Low Medium-Low Medium-High 2High Low Medium-Low Medium-High 2High
[phone] 1620 1590 1815 2010 2195
Factory Default 975 1120 1295 1460 1460 1645 1845 2010
–865 1010 1120 1290 1320 1500 1645 1860
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® Smart Zoning System Applications - Minimum blower speed is 450 cfm.
EL297UH090XV60C BLOWER MOTOR WATTS (COOLING)
1Cooling 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 79 107 135 157 188 215 245 273 293 264 284 346 390 425 453 503 538 580 607 640
Med-low 120 152 188 220 264 298 328 365 389 393 422 484 554 582 629 690 737 778 805 859
Med-High 191 221 272 304 333 372 414 452 481 582 604 679 726 778 839 887 921 970 1008 1039
High 264 284 346 390 425 453 503 538 580 805 845 888 949 1009 1048 1109 1133 1166 1196 1191
Factory Default
Cooling
Speed
Low 60 86 112 129 152 179 202 232 252 202 218 270 315 351 387 419 452 479 512 546
Med-low 90 123 149 174 209 235 264 293 331 286 340 389 378 430 503 553 580 636 661 699
Med-High 137 166 203 240 279 307 342 372 402 454 467 517 573 632 672 717 767 809 849 880
High 202 218 270 315 351 387 419 452 479 559 590 649 728 789 823 896 926 974 1030 1062
– Setting
Cooling
Speed
Low 47 62 85 107 132 148 166 179 201 142 168 212 247 285 313 348 373 409 450 472
Med-low 69 97 119 139 165 189 214 244 265 226 245 295 339 374 410 451 474 497 549 566
Med-High 90 123 149 174 209 235 264 293 331 301 335 385 430 471 510 557 607 632 677 713
High 133 167 200 232 274 311 340 371 405 454 470 553 588 641 695 725 764 820 849 880

Page 17
BLOWER DATA
EL297UH090XV60C 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
1Heating Speed
DIP Switch
Settings
First Stage Heating Speed - cfm Second Stage Heating Speed - cfm
+24% 1445 1920
+18% 1385 1875
+12% 1275 1735
+6% 1245 1600
Factory Default 1155 1565
–6% 1070 1480
–12% 975 1400
–18% 920 1275
COOLING
1Cooling Speed
DIP Switch
Settings
First Stage Cooling Speed - cfm Second Stage Cooling Speed - cfm
Low Medium-Low Medium-High 2High Low Medium-Low Medium-High 2High
[phone] 1550 1555 1715 1920 2135
Factory Default 960 1085 1225 1415 1430 1565 1790 1980
–840 990 1085 1250 1280 1450 1580 1790
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® Smart Zoning System Applications - Minimum blower speed is 450 cfm.
EL297UH090XV60C BLOWER MOTOR WATTS (COOLING)
1Cooling 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 95 123 147 173 204 233 260 290 241 273 315 357 405 433 466 519 547 584 620
Med-low 108 139 173 210 248 283 315 342 376 332 374 428 489 518 568 631 665 719 762 813
Med-High 159 192 233 272 314 359 386 421 457 518 557 601 675 713 772 819 873 913 949 987
High 241 273 315 357 405 433 466 519 547 713 750 822 866 946 986 1042 1085 1116 1144 1184
Factory Default
Cooling
Speed
Low 55 81 101 126 144 165 194 217 243 181 204 251 292 323 369 403 444 474 496 525
Med-low 75 109 134 159 194 226 255 282 316 270 304 361 389 433 473 506 547 602 642 665
Med-High 108 144 180 211 248 293 320 357 391 374 410 467 512 583 618 670 723 778 797 839
High 181 204 251 292 323 369 403 444 474 542 579 642 684 743 809 843 883 942 991 1019
– Setting
Cooling
Speed
Low 36 56 71 102 119 141 161 179 198 113 142 181 221 255 300 325 352 395 424 456
Med-low 57 84 110 133 151 175 210 234 257 170 208 209 303 343 382 417 455 489 509 552
Med-High 75 109 134 159 194 226 255 282 316 264 299 357 387 426 478 501 551 586 635 682
High 113 142 181 221 255 300 325 352 395 374 410 467 512 583 618 670 723 778 797 839

Page 18
BLOWER DATA
EL297UH110XV48C BLOWER PERFORMANCE (less lter)
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
1Heating Speed
DIP Switch
Settings
First Stage Heating Speed - cfm Second Stage Heating Speed - cfm
+24% 1470 1605
+18% 1450 1495
+12% 1385 1445
+6% 1295 1385
Factory Default 1225 1305
–6% 1160 1225
–12% 1090 1150
–18% 1035 1070
COOLING
1Cooling Speed
DIP Switch
Settings
First Stage Cooling Speed - cfm Second Stage Cooling Speed - cfm
Low Medium-Low Medium-High 2High Low Medium-Low Medium-High 2High
[phone] 1100 1325 1530 1760
Factory Default 760 875 1010 1135 1025 1205 1405 1565
–695 805 905 1040 920 1080 1260 1440
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 380 cfm.
Lennox® Smart Zoning System Applications - Minimum blower speed is 380 cfm.
EL297UH110XV48C BLOWER MOTOR WATTS (COOLING)
1Cooling 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 37 59 80 96 119 140 166 182 203 92 122 147 173 201 230 255 286 313 340 369
Med-low 57 85 105 132 153 175 206 230 256 136 170 204 237 275 311 351 382 411 447 481
Med-High 87 115 141 167 195 221 245 277 302 215 239 289 338 385 416 452 494 523 562 600
High 115 152 175 213 240 275 309 338 376 331 378 427 465 514 559 589 658 693 738 793
Factory Default
Cooling
Speed
Low 33 53 72 92 111 129 146 167 191 69 94 118 145 168 201 225 250 272 297 321
Med-low 40 70 85 110 135 155 185 200 230 108 145 166 201 226 262 292 321 358 383 417
Med-High 64 91 113 140 162 191 218 242 266 166 199 240 275 315 345 387 418 456 490 526
High 96 129 151 179 205 239 264 294 322 232 267 310 353 393 434 471 506 546 589 625
– Setting
Cooling
Speed
Low 27 45 65 83 99 116 139 155 176 49 75 97 117 144 171 191 219 246 268 286
Med-low 38 59 81 98 119 137 158 184 202 89 117 144 169 197 223 248 279 305 333 360
Med-High 46 73 93 115 142 164 188 211 241 120 156 182 219 249 286 321 351 385 415 449
High 71 97 122 149 172 205 228 254 277 184 217 256 300 337 369 409 443 483 517 554

Page 19
BLOWER DATA
EL297UH110XV48C BLOWER PERFORMANCE (less lter)
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
1Heating Speed
DIP Switch
Settings
First Stage Heating Speed - cfm Second Stage Heating Speed - cfm
+24% 1480 1580
+18% 1410 1505
+12% 1330 1415
+6% 1255 1365
Factory Default 1190 1270
–6% 1130 1205
–12% 1070 1120
–18% 1020 1060
COOLING
1Cooling Speed
DIP Switch
Settings
First Stage Cooling Speed - cfm Second Stage Cooling Speed - cfm
Low Medium-Low Medium-High 2High Low Medium-Low Medium-High 2High
[phone] 1085 1295 1515 1695
Factory Default 755 855 1000 1110 1015 1180 1375 1565
–700 785 885 1025 920 1070 1235 1395
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 380 cfm.
Lennox® Smart Zoning System Applications - Minimum blower speed is 380 cfm.
EL297UH110XV48C BLOWER MOTOR WATTS (COOLING)
1Cooling 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 35 58 79 99 120 148 166 192 209 79 107 142 168 196 225 254 286 314 344 376
Med-low 52 81 103 132 153 178 212 236 262 130 167 199 237 272 313 350 392 419 457 486
Med-High 93 128 156 183 207 246 274 314 339 215 246 290 334 375 416 457 490 528 569 598
High 108 144 175 207 241 276 308 345 376 287 333 383 427 482 515 571 614 666 716 756
Factory Default
Cooling
Speed
Low 28 49 69 92 110 128 147 175 192 63 88 122 143 169 198 224 250 281 311 330
Med-low 40 65 85 110 135 155 180 205 235 100 136 166 195 227 261 291 329 358 394 423
Med-High 59 85 115 139 163 190 220 245 274 154 192 229 270 309 345 383 428 459 503 534
High 85 116 148 175 201 235 263 299 325 245 280 328 370 412 444 488 521 570 608 650
– Setting
Cooling
Speed
Low 25 42 60 82 103 113 137 152 173 46 72 94 120 146 170 197 226 249 268 293
Med-low 39 62 82 102 120 140 165 187 207 74 99 137 162 193 218 247 276 305 337 366
Med-High 43 71 92 116 142 165 190 217 243 113 150 181 214 247 286 320 358 388 425 451
High 65 89 125 146 173 201 227 254 285 164 202 244 285 315 356 398 441 476 518 550

Page 20
BLOWER DATA
EL297UH110XV48C BLOWER PERFORMANCE (less lter)
SINGLE SIDE RETURN AIR WITH OPTIONAL RETURN AIR BASE
0 through 0.8 in. w.g. (Heating) and 0 through 1.0 in. w.g. (Cooling) External Static Pressure Range
HEATING
1Heating Speed
DIP Switch
Settings
First Stage Heating Speed - cfm Second Stage Heating Speed - cfm
+24% 1465 1560
+18% 1370 1490
+12% 1310 1400
+6% 1235 1340
Factory Default 1185 1270
–6% 1120 1210
–12% 1060 1120
–18% 1015 1065
COOLING
1Cooling Speed
DIP Switch
Settings
First Stage Cooling Speed - cfm Second Stage Cooling Speed - cfm
Low Medium-Low Medium-High 2High Low Medium-Low Medium-High 2High
[phone] 1085 1285 1500 1680
Factory Default 745 860 980 1100 1015 1185 1355 1550
–670 790 890 1025 920 1075 1240 1385
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 380 cfm.
Lennox® Smart Zoning System Applications - Minimum blower speed is 380 cfm.
EL297UH110XV48C BLOWER MOTOR WATTS (COOLING)
1Cooling 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 35 58 79 99 120 148 166 192 209 73 108 132 158 184 214 244 279 309 336 363
Med-low 44 75 92 117 150 170 198 230 249 110 150 178 209 248 288 324 355 389 430 460
Med-High 69 102 126 154 178 206 235 274 299 187 230 262 305 337 378 429 463 501 536 573
High 94 133 162 185 216 255 294 321 360 270 319 361 403 440 494 538 580 629 670 718
Factory Default
Cooling
Speed
Low 27 50 69 87 102 127 150 168 192 59 88 116 136 161 194 218 251 272 302 325
Med-low 35 60 80 100 125 150 175 195 225 86 126 154 177 205 242 280 306 345 377 409
Med-High 54 83 107 128 157 184 210 243 263 131 172 203 240 279 318 351 390 426 469 500
High 78 113 137 162 189 221 252 284 317 210 252 291 327 376 413 456 493 529 570 620
– Setting
Cooling
Speed
Low 24 42 65 80 93 116 135 155 173 37 66 89 111 140 163 190 202 239 266 296
Med-low 32 57 75 94 114 136 161 184 205 71 104 128 155 180 208 237 276 302 327 352
Med-High 38 65 85 106 135 158 184 200 233 97 137 166 191 225 264 304 330 367 402 434
High 61 91 118 139 164 196 221 255 276 145 182 220 259 299 333 374 410 449 487 523