Lennox CBX40UHV Series, CBX40UHV-024, CBX40UHV-030 Installation And Service Procedure

INSTALLATION AND SERVICE

PROCEDURE

Corp. 0906-L2

Service Literature

Revised August, 2018

CBX40UHV (HFC-410A) SERIES UNITS (Communicating)

NOTICE

A thermostat is not included and must be ordered
separately.

D A Lennox communicating thermostat must be used in

communicating applications
(CBX40UHV-XXX-230-6-02 and later).

D In non-communicating applications, the Lennox

ComfortSense
as other non-communicating thermostats.

In all cases, setup is critical to ensure proper system
operation.

®

7500 thermostat may be used, as well

WARNING

Improper installation, adjustment, alteration, service or
maintenance can cause personal injury, loss of life, or
damage to property.

Installation and service must be performed by a licensed
professional installer (or equivalent) or a service agency.

CAUTION

Physical contact with metal edges and corners while
applying excessive force or rapid motion can result in
personal injury. Be aware of, and use caution when
working near these areas during installation or while
servicing this equipment.

CBX40UHV

TABLE OF CONTENTS

Model Number Identification 2.......................

Specifications / Electrical Data 2.....................

Blower Performance 3..............................

Parts Arrangement 3...............................

Application 9......................................

Unit Components 9.................................

Field Wiring 13....................................

Air Handler Control Button, Display and Jumpers 17....

Variable Speed ECM Blower Motor 20................

Optional ECB40 Electric Heat 25.....................

Optional Humidity Control 25........................

Unit Sequence of Operations 33.....................

Unit Status and Alarm Codes 35.....................

Application Configuration Modifications 38.............

Start-Up Operation 41..............................

Operating Characteristics 41........................

Maintenance 42....................................

Configuring Unit Flow Charts 43.....................

Unit Diagram 52...................................

Electric Heat Diagrams and Sequence of

Operations 53.....................................

CBX40UHV series units are designed to be matched with
Lennox two‐stage or single‐stage HFC-410A air conditioner
units and heat pumps. Several models are available in sizes
ranging from 2 through 5 tons. All units are equipped with
factory installed HFC-410A check and expansion valve for
cooling or heat pump applications.

This air handler is compatible with the ComfortSense® 7500
non-communicating thermostat and non-communicating
outdoor units. In addition, this unit has the enhanced
capability of communicating with a communicating
thermostat and compatible outdoor units using the Lennox
RSBus protocols.

Optional ECB40 electric heat is available in several kW
sizes, and can be field installed in the cabinets.

This document provides service information on the
following model builds:

1. Non-communicating version (CBX40UHV-XXX-

230-6-01)

2. Communicating version (CBX40UHV-XXX-

230-6-02) or later.

Page 1

2018 Lennox Industries Inc.

MODEL NUMBER IDENTIFICATION

CB X 40 UHV − 036 − 230 − 6 − 02

Unit Type

Minor Revision Number

CB = Air Handler

Refrigerant Type

X = R-410A

Series

Configuration

UHV = Up-Flow/Horizontal, Variable

Speed Blower Motor

Nominal Cooling Capacity

Refrigerant Metering Device

2 = Fixed Orifice
3 = TXV - Bleedport (indoor unit)
4 = TXV - Non-bleedport (indoor unit)
5 = TXV - Non-bleedport (outdoor unit)
6 = TXV - R-410A Non-bleedport (indoor unit)

Voltage

230 = 208/230V-60hz-1ph

024 = 2 tons

030 = 2.5 tons

036 = 3 tons

042 = 3.5 tons

048 = 4 tons
060 = 5 tons

SPECIFICATIONS / ELECTRICAL DATA

Refer to the Unit Engineering Handbook or Lennox Price Book for optional accessories for this unit.

SPECIFICATIONS

General Data

Model Number

Nominal cooling capacity - tons

Refrigerant

Connections
in.

Indoor
Coil

Blower Data Wheel nominal diameter x width - in.

Filters (MERV16)
Shipping Data - 1 Package - lbs.

Suction (vapor) line - sweat

Liquid line - sweat

Condensate drain (fpt)

Net face area - ft.

Tube outside diameter - in.

Number of rows

Fins per inch

Motor output - hp

1

Size - in.

CBX40UH

V

‐024

2 2.5 3 3.5 4 5

HFC-410A HFC-410A HFC-410A HFC-410A HFC-410A HFC-410A

3/4 3/4 3/4 7/8 7/8 7/8
3/8 3/8 3/8 3/8 3/8 3/8

(2) 3/4 (2) 3/4 (2) 3/4 (2) 3/4 (2) 3/4 (2) 3/4

2

5.0 5.0 5.0 7.22 7.22 7.22
3/8 3/8 3/8 3/8 3/8 3/8

3 3 3 3 3 3

12 12 12 12 12 12

11 X 8 11 X 8 11 X 8 11-1/2 X 9 11-1/2 X 9 11-1/2 X 9

1/2 1/2 3/4 1 1 1

20 X 20 X 5 20 X 20 X 5 20 X 20 X 5 20 X 25 X 5 20 X 25 X 5 20 X 25 X 5

165 167 172 214 216 216

CBX40UH

V

‐030

CBX40UH

V

‐036

CBX40UH

V

‐042

ELECTRICAL DATA

Voltage - phase - 60hz

2

Maximum overcurrent protection (unit only)

Minimum circuit ampacity (unit only)

1

Disposable frame type filter.

2

HACR type circuit breaker or fuse.

15 15 15 20 20 20

5 5 10 10 10 10

208/230V-1PH

CBX40UH

V

‐048

CBX40UH

V

‐060

Page 2

CBX40UHV

BLOWER DATA

CBX40UHV024 BLOWER PERFORMANCE

0 through 0.80 in. W.g. External Static Pressure Range

“AJUST”

Jumper Setting

1

“HEAT” Speed “COOL” Speed

2

Jumper Speed Positions

3

4

1

2

3

4

NOTES:

+

NORM

-

cfm

715 855 1000 1130 465 690 900 1050

670 770 900 1035 425 620 825 950

580 700 800 930 385 560 735 850

cfm

cfm

cfm

cfm

cfm

cfm

cfm

S The effect of static pressure, filter and electric heater resistance is included in the air volumes listed.
S First stage cooling air volume is 70% of COOL speed settings. Continuous fan speed is approximately 28%, 38%, 70% and 100% (Jumper

selectable) of the same secondstage COOL speed selected, minimum 250 cfm.

S Lennox Harmony III™ Zone Control applications - minimum blower speed if 250 cfm.

CBX40UHV‐024 BLOWER MOTOR WATTS AT “+” (Plus) AHC SETTING (Adjust Jumper at “+” Setting)

AHC Jumper Speed

Positions

TAP 1 53 68 89 113 143 163 191 214 232

HEAT SPEED

COOL SPEED

CBX40UHV‐024 BLOWER MOTOR WATTS AT “NORM” AHC SETTING (Adjust Jumper at NORM Setting)

TAP 2 73 93 122 141 170 200 234 260 282

TAP 3 105 141 168 179 217 248 275 306 348

TAP 4 132 159 189 218 248 285 313 349 393

TAP 1 25 35 56 73 89 98 114 130 143

TAP 2 45 64 79 101 130 151 180 211 216

TAP 3 75 103 127 146 177 210 243 266 298

TAP 4 11 4 142 175 200 219 258 280 332 363

0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8

AHC Jumper Speed

Positions

HEAT SPEED

COOL SPEED

TAP 1 48 64 79 103 128 156 182 196 207

TAP 2 61 80 98 123 149 175 206 233 254

TAP 3 77 101 128 151 178 214 239 267 300

TAP 4 109 142 171 193 223 245 286 325 359

TAP 1 23 38 52 68 80 91 111 128 135

TAP 2 34 53 76 94 111 142 152 176 203

TAP 3 64 87 11 3 130 158 190 226 247 270

TAP 4 89 120 145 166 198 225 258 289 319

0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8

Motor Watts @ Various External Static Pressures - in. wg.

Motor Watts @ Various External Static Pressures - in. wg.

CBX40UHV‐024 BLOWER MOTOR WATTS AT “-” (Minus) AHC SETTING (Adjust Jumper at “-” Setting)

AHC Jumper Speed

Positions

HEAT SPEED

COOL SPEED

CBX40UHV

0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8

TAP 1 38 56 70 94 11 3 130 154 176 192

TAP 2 53 68 88 110 138 163 195 207 234

TAP 3 62 84 103 125 155 186 213 246 268

TAP 4 89 116 141 165 192 220 250 278 314

TAP 1 22 33 47 61 71 83 98 11 0 123

TAP 2 30 46 63 86 102 11 8 138 162 172

TAP 3 54 71 91 116 138 171 191 221 247

TAP 4 66 86 11 7 138 159 195 227 253 286

Motor Watts @ Various External Static Pressures - in. wg.

Page 3

CBX40UHV030 BLOWER PERFORMANCE

0 through 0.80 in. W.g. External Static Pressure Range

“AJUST”

Jumper Setting

1

“HEAT” Speed “COOL” Speed

2

Jumper Speed Positions

3

4

1

2

3

4

NOTES:

+

NORM

-

cfm

800 935 1070 1210 660 880 1100 1320

725 850 975 1100 600 800 1000 1200

655 765 880 990 540 720 900 1080

cfm

cfm

cfm

cfm

cfm

cfm

cfm

S The effect of static pressure, filter and electric heater resistance is included in the air volumes listed.
S First stage cooling air volume is 70% of COOL speed settings. Continuous fan speed is approximately 28%, 38%, 70% and 100% (Jumper

selectable) of the same secondstage COOL speed selected, minimum 250 cfm.

S Lennox Harmony III™ Zone Control applications - minimum blower speed if 250 cfm.

CBX40UHV‐030 BLOWER MOTOR WATTS AT “+” (Plus) AHC SETTING (Adjust Jumper at “+” Setting)

AHC Jumper Speed

Positions

TAP 1 66 87 11 4 134 162 185 214 239 268

HEAT SPEED

COOL SPEED

CBX40UHV‐030 BLOWER MOTOR WATTS AT “NORM” AHC SETTING (Adjust Jumper at NORM Setting)

TAP 2 101 124 151 175 192 224 243 273 325

TAP 3 134 171 188 212 243 273 296 329 366

TAP 4 182 211 245 285 319 353 375 405 444

TAP 1 47 63 82 101 121 151 175 193 206

TAP 2 83 107 131 152 178 202 231 265 296

TAP 3 142 170 196 220 251 282 315 345 367

TAP 4 209 258 295 345 373 418 452 482 512

0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8

AHC Jumper Speed

Positions

HEAT SPEED

COOL SPEED

TAP 1 57 77 94 115 146 172 195 219 232

TAP 2 79 104 123 149 168 196 231 264 294

TAP 3 111 139 164 186 209 233 261 298 334

TAP 4 148 178 199 231 260 293 314 355 382

TAP 1 38 53 68 94 11 3 127 149 169 185

TAP 2 67 84 105 131 152 178 207 240 257

TAP 3 110 141 164 188 213 240 266 292 330

TAP 4 168 197 226 260 302 338 366 400 434

0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8

Motor Watts @ Various External Static Pressures - in. wg.

Motor Watts @ Various External Static Pressures - in. wg.

CBX40UHV‐030 BLOWER MOTOR WATTS AT “-” (Minus) AHC SETTING (Adjust Jumper at “-” Setting)

AHC Jumper Speed

Positions

HEAT SPEED

COOL SPEED

TAP 1 48 66 83 107 127 149 171 199 217

TAP 2 63 80 103 125 145 178 200 229 246

TAP 3 86 113 135 155 179 203 244 270 305

TAP 4 109 144 165 191 212 240 264 296 338

TAP 1 32 47 60 86 101 11 3 134 151 168

TAP 2 54 70 88 107 132 157 188 210 225

TAP 3 87 114 137 159 183 206 232 267 302

TAP 4 130 165 184 207 245 270 300 326 363

0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8

Motor Watts @ Various External Static Pressures - in. wg.

Page 4

CBX40UHV

CBX40UHV036 BLOWER PERFORMANCE

0 through 0.80 in. W.g. External Static Pressure Range

“AJUST”

Jumper Setting

1

“HEAT” Speed “COOL” Speed

2

Jumper Speed Positions

3

4

1

2

3

4

NOTES:

+

NORM

-

cf

1230 1335 1445 1545 900 1225 1380 1545

m

1120 1215 1315 1400 810 1125 1275 1400

1010 1185 1200 1265 730 1000 1135 1265

cf
m

cfm

cfm

cf
m

cf
m

cfm

cfm

S The effect of static pressure, filter and electric heater resistance is included in the air volumes listed.
S First stage cooling air volume is 70% of COOL speed settings. Continuous fan speed is approximately 28%, 38%, 70% and 100% (Jumper

selectable) of the same secondstage COOL speed selected, minimum 380 cfm.

S Lennox Harmony III™ Zone Control applications - minimum blower speed if 380 cfm.

CBX40UHV‐036 BLOWER MOTOR WATTS AT “+” (Plus) AHC SETTING (Adjust Jumper at “+” Setting)

AHC Jumper Speed

Positions

HEAT SPEED

COOL SPEED

CBX40UHV‐036 BLOWER MOTOR WATTS AT “NORM” AHC SETTING (“Adjust” Jumper at NORM Setting)

TAP 1 189 223 253 271 306 323 359 377 409

TAP 2 238 273 295 316 349 375 417 439 473

TAP 3 279 322 348 384 420 463 486 525 550

TAP 4 327 387 427 451 489 537 566 600 643

TAP 1 130 157 184 212 237 263 284 307 346

TAP 2 183 211 232 261 296 314 342 368 396

TAP 3 248 284 315 349 366 407 441 473 509

TAP 4 347 376 418 464 495 531 566 608 632

0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8

AHC Jumper Speed

Positions

HEAT SPEED

COOL SPEED

TAP 1 146 173 199 225 257 279 304 330 364

TAP 2 186 234 241 264 296 319 340 371 395

TAP 3 226 263 281 304 341 371 393 435 456

TAP 4 261 296 321 355 389 423 450 489 519

TAP 1 98 117 143 165 185 216 247 267 301

TAP 2 144 168 197 223 250 272 299 332 356

TAP 3 198 227 265 279 307 340 363 397 431

TAP 4 255 285 313 346 386 418 454 483 527

0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8

Motor Watts @ Various External Static Pressures - in. wg.

Motor Watts @ Various External Static Pressures - in. wg.

CBX40UHV‐036 BLOWER MOTOR WATTS AT “-” (Minus) AHC SETTING (“Adjust” Jumper at “-” Setting)

AHC Jumper Speed

Positions

HEAT SPEED

COOL SPEED

CBX40UHV

0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8

TAP 1 11 0 139 161 185 213 234 263 291 312

TAP 2 182 210 236 252 293 315 336 356 393

TAP 3 175 193 224 257 294 312 330 350 382

TAP 4 199 234 257 291 309 333 366 395 423

TAP 1 86 102 124 143 165 193 218 246 270

TAP 2 103 130 148 172 192 219 248 277 309

TAP 3 144 163 192 216 250 275 294 322 357

TAP 4 196 224 255 287 306 339 371 395 429

Motor Watts @ Various External Static Pressures - in. wg.

Page 5

CBX40UHV042 BLOWER PERFORMANCE

0 through 0.80 in. W.g. External Static Pressure Range

“AJUST”

Jumper Setting

1

“HEAT” Speed “COOL” Speed

2

Jumper Speed Positions

3

4

1

2

3

4

NOTES:

+

NORM

-

cfm

1100 1320 1540 1760 1100 1320 1540 1760

1000 1200 1400 1600 1000 1200 1400 1600

900 1080 1260 1440 900 1080 1260 1440

cfm

cfm

cfm

cfm

cfm

cfm

cfm

S The effect of static pressure, filter and electric heater resistance is included in the air volumes listed.
S First stage cooling air volume is 70% of COOL speed settings. Continuous fan speed is approximately 28%, 38%, 70% and 100% (Jumper

selectable) of the same secondstage COOL speed selected, minimum 450 cfm.

S Lennox Harmony III™ Zone Control applications - minimum blower speed if 450 cfm.

CBX40UHV‐042 BLOWER MOTOR WATTS AT “+” (Plus) AHC SETTING (“Adjust” Jumper at “+” Setting)

AHC Jumper Speed

Positions

HEAT SPEED

COOL SPEED

CBX40UHV‐042 BLOWER MOTOR WATTS AT “NORM” AHC SETTING (“Adjust” Jumper at NORM Setting)

TAP 1 124 154 177 204 240 260 296 326 363

TAP 2 179 227 255 287 336 356 394 451 486

TAP 3 294 339 387 425 463 489 518 550 600

TAP 4 405 456 510 553 607 647 686 743 777

TAP 1 122 146 173 198 224 259 292 329 360

TAP 2 186 230 254 289 332 361 404 438 477

TAP 3 284 335 387 413 455 483 526 551 600

TAP 4 413 475 517 570 632 569 715 750 782

0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8

AHC Jumper Speed

Positions

“HEAT” SPEED

COOL SPEED

TAP 1 97 123 146 179 205 225 258 292 327

TAP 2 144 180 209 230 266 295 334 375 410

TAP 3 226 259 307 342 380 405 448 482 525

TAP 4 323 369 401 449 491 516 563 593 640

TAP 1 93 118 142 166 197 225 247 280 314

TAP 2 148 179 207 231 268 311 333 377 405

TAP 3 229 263 298 332 386 408 446 484 534

TAP 4 327 375 403 448 489 523 557 589 646

0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8

Motor Watts @ Various External Static Pressures - in. wg.

Motor Watts @ Various External Static Pressures - in. wg.

CBX40UHV‐042 BLOWER MOTOR WATTS AT “-” (Minus) AHC SETTING (“Adjust” Jumper at “-” Setting)

AHC Jumper Speed

Positions

HEAT SPEED

COOL SPEED

TAP 1 80 105 128 148 173 206 233 265 287

TAP 2 113 144 172 193 219 265 286 312 349

TAP 3 168 198 238 265 293 332 368 415 442

TAP 4 239 285 315 362 398 428 465 503 544

TAP 1 76 100 123 148 169 203 230 260 279

TAP 2 115 145 169 190 217 258 288 315 349

TAP 3 166 199 236 263 296 330 380 415 449

TAP 4 241 289 321 366 396 431 472 505 544

0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8

Motor Watts @ Various External Static Pressures - in. wg.

Page 6

CBX40UHV

CBX40UHV048 AND CBX40UHV-060 BLOWER PERFORMANCE

0 through 0.80 in. W.g. External Static Pressure Range

Jumper Speed Positions

“AJUST”

Jumper Setting

1

“HEAT” Speed “COOL” Speed

2

3

4

1

2

3

4

NOTES:

+

NORM

-

cfm

1850 1960 2090 2150 1625 1820 2055 2145

1705 1800 1900 2005 1425 1625 1805 2005

1560 1625 1720 1770 1205 1375 1555 1725

cfm

cfm

cfm

cfm

cfm

cfm

cfm

S The effect of static pressure, filter and electric heater resistance is included in the air volumes listed.
S First stage cooling air volume is 70% of COOL speed settings. Continuous fan speed is approximately 28%, 38%, 70% and 100% (Jumper

selectable) of the same secondstage COOL speed selected, minimum 450 cfm.

S Lennox Harmony III™ Zone Control applications - minimum blower speed if 450 cfm.

CBX40UHV‐048 and CBX40UHV-060 BLOWER MOTOR WATTS AT “+” (Plus) AHC SETTING (“Adjust” Jumper at “+”
Setting)

AHC Jumper Speed

Positions

HEAT SPEED

COOL SPEED

TAP 1 418 478 539 551 599 646 675 704 748

TAP 2 492 540 585 642 684 732 761 797 834

TAP 3 594 645 721 762 811 863 874 918 976

TAP 4 653 713 755 809 861 909 941 974 1028

TAP 1 312 342 373 414 443 475 512 558 587

TAP 2 407 459 503 552 591 627 670 718 752

TAP 3 581 646 691 737 792 826 863 900 942

TAP 4 646 695 746 804 873 900 934 976 1032

0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8

Motor Watts @ Various External Static Pressures - in. wg.

CBX40UHV‐048 and CBX40UHV-060 BLOWER MOTOR WATTS AT “NORM” AHC SETTING (“Adjust” Jumper at NORM
Setting)

AHC Jumper Speed

Positions

HEAT SPEED

COOL SPEED

TAP 1 325 366 404 444 475 520 566 598 636

TAP 2 369 421 465 516 560 587 616 666 717

TAP 3 436 488 540 586 621 671 710 743 789

TAP 4 523 581 636 684 738 789 816 852 894

TAP 1 226 259 293 322 350 387 413 446 472

TAP 2 312 355 382 423 450 492 520 570 615

TAP 3 388 421 482 523 564 606 641 695 741

TAP 4 538 599 647 686 718 792 820 853 888

0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8

Motor Watts @ Various External Static Pressures - in. wg.

CBX40UHV

Page 7

CBX40UHV‐048 and CBX40UHV-060 BLOWER MOTOR WATTS AT “-” (Minus) AHC SETTING (“Adjust” Jumper at “-”
Setting)

AHC Jumper Speed

Positions

HEAT SPEED

COOL SPEED

TAP 1 271 302 341 368 398 439 473 504 545

TAP 2 286 329 356 393 423 462 504 550 572

TAP 3 327 374 407 455 504 526 563 608 638

TAP 4 355 404 442 496 539 560 602 643 684

TAP 1 124 163 180 209 231 271 300 322 357

TAP 2 192 233 252 282 321 356 390 422 449

TAP 3 268 311 336 367 393 432 469 523 538

TAP 4 328 376 420 463 486 536 572 612 657

0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8

Motor Watts @ Various External Static Pressures - in. wg.

PARTS ARRANGEMENT

ELECTRIC HEAT

SECTION

CONTROL BOX

BLOWER

COMPARTMENT

BLOWER ACCESS

PANEL

COIL ACCESS

PANEL

FILTER ACCESS

PANEL

HORIZONTAL

DRAIN PAN

COIL

UP-FLOW/DOWN-FLOW

DRAIN PAN

FILTER

Figure 1. CBX40UHV Parts Arrangement

Page 8

CBX40UHV

LIMIT

RELAY

RELAY

CIRCUIT BREAKER

LIMIT

Figure 2. CBX40UHV Control Box

APPLICATION

CBX40UHV air handlers are designed for HFC-410A
applications only. All major air handler components

must be matched according to Lennox
reco m mendation s for the u n i t to be covered under
warranty. Refer to the Engineering Handbook for approved

system matchups. A misapplied system will cause erratic
operation and can result in early unit failure. The units come
with factory installed check and expansion valve for all
applications. It has been installed internally and is accessible if
required.

ELECTROSTATIC DISCHARGE (ESD)

PRECAUTIONS AND PROCEDURES

CAUTION

Electrostatic discharge can affect electronic compo
nents. Take precautions during unit installation and
service to protect the unit's electronic controls. Pre
cautions will help to avoid control exposure to electro
static discharge by putting the unit, the control and the
technician at the same electrostatic potential.
Neutralize electrostatic charge by touching hand and
all tools on an unpainted unit surface before perform
ing any service procedure.

HEATING ELEMENTSHEATING ELEMENTS

AIR HANDLER CONTROL

UNIT COMPONENTS

Control Box

The CBX40UHV control box is shown in figure 2. Line
voltage and electric heat connections are made in the
control box. Optional electric heat fits through an opening
located in the center of the control box. When electric heat
is not used, knockout plates cover the opening. The electric
heat control arrangement is detailed in the electric heat section
of this manual.

Low voltage connections are made on the air handler
control (AHC) also located in the control box. All AHC will
have factory installed clippable links connecting DS to R, R
to O and Y1 to Y2. These links will have to be removed in
certain unit application. See table 1.

Table 1. Links

Application

Remove Links

Harmony IIIt DS to R

Heat Pump R to O

Two-Stage Cooling Y1 to Y2

Transformer (T1)

All CBX40UHV series units use a single line voltage to
24VAC transformer mounted in the control box. The
transformer supplies power to the control circuits in the
indoor and outdoor unit. Transformers are rated at 70VA.
208/240VAC single‐phase transformers use two primary
voltage taps.

CBX40UHV

Page 9

208 / 240 VOLT TRANSFORMER

PRIMARY

ORANGE

240 VOLTS

RED

SECONDARY

BLUE

Air Handler Control (AHC)

The Air Handler Control manages electric heat, indoor
blower and accessory controls. The Air Handler Control
also provides system configuration and air-flow
adjustments plus diagnostic capabilities.

208 VOLTS

BLACK

YELLOW

Figure 3 Transformer

Plastic Drain Pans

Both up-flow/down-flow and horizontal drain pans are
provided and installed on the CBX40UHV units. The drain
pans are made from fiberglass‐filled plastic. The drain hole
is used for right‐hand air discharge only, and must be
plugged when the unit is configured for left‐hand air
discharge. Each pan has a set of connections, one for a
primary drain and one for an auxiliary drain.

Coil

All CBX40UHV series units have dual slab coils arranged in
an ”A” configuration. Each coil has two or three rows of
copper tubes fitted with ripple‐edge aluminum fins. A check
and expansion valve complete with inlet screen feeds
multiple parallel circuits through the coils. The coil is
designed to easily slide out of the unit cabinet.

Discharge Sensor (DAT)

The Air Handler Control has two screw terminals marked
Discharge Air Sensor. The sensor is REQUIRED for

®

EvenHeater

operation and is field mounted and ordered

separately, use Lennox Catalog # 88K38.

In the EvenHeater mode, the discharge air sensor cycles
the electric heating elements as needed to maintain the Air
Handler control EvenHeater jumper selected discharge
setpoint.

The discharge air sensor should be mounted downstream
of the electric heat elements as illustrated in Figure 4, Detail
A. It must be placed in a location with unobstructed airflow,
where other accessories (such as humidifiers, UV lights,
etc.) will not interfere with its accuracy.

Wiring distance between the Air Handler Control and the
discharge air sensor should not exceed 10' (3m) when
wired with 18-gauge thermostat wire.

Outdoor Air Sensor (OAS)

These terminals are for FUTURE USE. (DO NOT USE).

Page 10

CBX40UHV

ELECTRIC HEAT RELAY

PART NO. 49W91

19 IN.

(483 MM)

5-1/2 IN.

(140 MM)

SENSOR

(CENTER SIDE-T0 -SIDE)

DETAIL A

THE AIR HANDLER CONTROL (AHC) HAS TWO
SCREW TERMINALS MARKED DISCHARGE AIR
SENSOR. THE SENSOR IS REQUIRED FOR
EVENHEATER
MOUNTED AND MUST BE ORDERED
SEPARATELY (CATALOG # 88K38).

®

OPERATION, IS FIELD

OPTIONAL DISCHARGE

SENSOR (DAT)

TEMPERATURE RESISTANCE

CHART

TEMP RESISTANCE
ºF (OHMS)
30 34,566
40 26,106
50 19,904
60 15,313
70 11,884
80 9,298
90 7,332
100 5,826

22V DIRECT CURRENT COIL

30 AMP CONTACT

RATING

DETAIL B

SEE TABLE 6 - STAGES
FOR FUNCTION OF
EACH PIN POSITION.

CONNECTOR

9-PIN CONNECTOR

9-PIN

FASTEN THE PROBE

BRACKET TO THE

PLENUM WITH TWO

SELF-TAPPING SHEET

METAL SCREWS.

AIR HANDLER
CONTROL

SECURING
SCREWS

AIR HANDLER CONTROL
L-BRACKET MOUNTING PLATE

CBX40UHV AIR HANDLER CONTROL

PART NO. 43W19

PLENUM

NOTE - EVENHEATER MODE CANNOT BE ENABLED WITH HARMONY III
DUE TO EACH CONTROL REQUIRING ITS OWN DISCHARGE AIR SENSOR.

Figure 4. CBX40UHV-XXX-230-6-01

CBX40UHV

T

Page 11

CONNECT WIRES TO DISCHARGE AIR SENSOR

TERMINAL ON AIR HANDLER CONTROL.

DETAIL A

THE AIR HANDLER CONTROL (AHC) HAS TWO
SCREW TERMINALS MARKED DISCHARGE AIR
SENSOR. THE SENSOR IS REQUIRED FOR
EVENHEAT OPERATION, IS FIELD-MOUNTED
AND MUST BE ORDERED SEPARATELY
(CATALOG # 88K38).

ELECTRIC HEAT RELAY

PART NO. 49W91

22V DIRECT CURRENT COIL

19 IN.

(483 MM)

5-1/2 IN.

(140 MM)

SENSOR

(CENTER SIDE-T0 -SIDE)

AIR HANDLER
CONTROL

DISCHARGE SENSOR

(DAT)

TEMPERATURE RESISTANCE

CHART

TEMP RESISTANCE
ºF (OHMS)
30 34,566
40 26,106
50 19,904
60 15,313
70 11,884
80 9,298
90 7,332
100 5,826

FASTEN THE PROBE

BRACKET TO THE

PLENUM WITH TWO

SELF-TAPPING SHEET

METAL SCREWS.

PLENUM

30 AMP CONTACT

RATING

9-PIN

CONNECTOR

9-PIN CONNECTOR

DETAIL B

SEE TABLE 6 - STAGES
FOR FUNCTION OF
EACH PIN POSITION.

NOTE — EVENHEAT MODE CANNOT BE ENABLED WITH HARMONY III DUE
TO EACH CONTROL REQUIRING ITS OWN DISCHARGE AIR SENSOR.

SECURING
SCREWS

AIR HANDLER CONTROL
L-BRACKET MOUNTING PLATE

CBX40UHV AIR HANDLER CONTROL

PART NO. 50W28 or 65W70

CONNECT WIRES TO DISCHARGE AIR SENSOR

TERMINAL ON AIR HANDLER CONTROL.

Figure 5. Component Connections (CBX40UHV-XXX-230-6-02)

Page 12

CBX40UHV

FIELD WIRING

AIR CONDITIONER

UNIT

(TWO-STAGE)

RED

BROWN

YELLOW

BLUE

BLACK

HEAT PUMP UNIT

(TWO-STAGE)

R

W1

L

Y1

CBX40UHV

R

2

W3

W2

W1

O

3

Y1

Y2

G

DS

C

COMFORTSENSET

1

Figure 6. Field Wiring — Cooling Application (Non-Communicating)

CBX40UHV

RR

W3

W2

W1 W1

OO

2

Y1

COMFORTSENSET

7000

H

W2

O

L

Y1

7000

R

H

W2

W1

O

L

Y1

Y2

G

D

B

C

1

O. D.

SENSOR

(X2658)

AIR HANDLER CONTROL COMES FROM FACTORY WITH A
METAL JUMPERS BETWEEN W1 TO W2 AND W2 TO W3.

1

R CONNECTION REQUIRED FOR AIR CONDITIONER UNIT WITH LSOM.
RESISTOR KIT (CAT # 47W97) IS REQUIRED WHEN CONNECTING THE

2

COMFORTSENSE 7000 WITH THE LSOM 2.

L CONNECTION WIRED ON UNITS WITH LSOM.

3

IMPORTANT — USE CARE WHEN CUTTING LINKS TO
PREVENT DAMAGE TO CONTROL. SEE FIGURE 12,
CBX40UHV JUMP AND LINK GUIDE FOR FURTHER
DETAILS.

CUT ON-BOARD LINK Y1-Y2 FOR TWO-STAGE AC

DO NOT CUT ON-BOARD LINK R -O.

CUT ON-BOARD LINK R-DS WHEN DEHUMIDIFICATION TERMINAL IS USED.

X2658 OUTDOOR SENSOR IS REQUIRED FOR OUTDOOR
TEMPERATURE DISPLAY, DEW POINT CONTROL, HEAT PUMP AND

1

DUAL FUEL BALANCE POINTS.

CONNECTED ON UNIT WITH LSOM. RESISTOR KIT (CAT #

2

47W97) IS REQUIRED WHEN CONNECTING THE
COMFORTSENSE 7000 WITH THE LSOM 2.

3

FIELD PROVIDED JUMPER BETWEEN Y2 OUT BL ON HEAT PUMP
TO Y2 ON CBX40UHV.

IMPORTANT — USE CARE WHEN CUTTING LINKS TO
PREVENT DAMAGE TO CONTROL. SEE FIGURE 12,
CBX40UHV JUMP AND LINK GUIDE FOR FURTHER
DETAILS.

AIR HANDLER

CONTROL

Y1-Y2

2-STAGE

COMPR

R-O
HEAT
PUMP

R-DS

DEHUM

OR

HARMONY

CUT FOR OPTION

Y2

OUT

BL

CC

CBX40UHV

Y2Y2

G

DS

3

Y2

G

D

T

B

T

C

CUT ON-BOARD LINK R-DS WHEN DEHUMIDIFICATION TERMINAL IS USED.

CUT ON-BOARD LINK Y1-Y2 FOR TWO-STAGE HP

CUT ON-BOARD LINK R -O.

Y1-Y2

2-STAGE

COMPR

R-O

HEAT

PUMP

R-DS

DEHUM

OR

HARMONY

CUT FOR OPTION

Figure 7. Field Wiring — Heat Pump (Non-Communicating)

Page 13

OUTDOOR

SENSOR

(X2658)

RED

D

RED

BLK

PUR

EDA UNIT

CBX40UHV

PUR

BLK

FAN
RELAY

YEL

BLU

BLK

BRN

OUTDOOR UNIT

NOTES ­/1\

NOT REQUIRED FOR APPLICATIONS WITHOUT LSOM

/2\ NOT REQUIRED WITH SINGLE‐SPEED OUTDOOR FAN

NOT REQUIRED FOR SINGLE STAGE

/3\

AIR HANDLER CONTROL COMES FROM FACTORY WITH A METAL

4

JUMPERS BETWEEN W1 TO W2 AND W2 TO W3.

4

T

T

RESISTOR KIT (CAT # 47W97) IS REQUIRED
WHEN CONNECTING THE COMFORTSENSE
7000 WITH THE LSOM 2.

COMFORTSENSEt
7000 THERMOSTAT

CUT ON-BOARD LINK R-DS WHEN DEHUMIDIFICATION

IMPORTANT — USE CARE WHEN CUTTING LINKS TO
PREVENT DAMAGE TO CONTROL. SEE FIGURE 12,
CBX40UHV JUMP AND LINK GUIDE FOR FURTHER
DETAILS.

CUT ON-BOARD LINK Y1-Y2 FOR TWO-

DO NOT CUT ON-BOARD LINK R -O.

STAGE A/C

TERMINAL IS USED.

Y1-Y2

2-STAGE

COMPR

R-O

HEAT

PUMP

R-DS

DEHUM

OR

HARMONY

CUT FOR OPTION

Figure 8. Cooling Application — Humiditrol

OUTDOOR UNIT

RED

FAN RELAY (NOT REQUIRED
WITH SINGLE−SPEED
OUTDOOR FAN)

PURPLE

BLACK
YELLOW
BLUE

BROWN (NOT USED FOR APPLICATIONS WITHOUT LSOM

BLUE (NOT REQUIRED FOR SINGLE STAGE)

IMPORTANT — USE CARE WHEN CUTTING LINKS TO
PREVENT DAMAGE TO CONTROL. SEE FIGURE 12,
CBX40UHV JUMP AND LINK GUIDE FOR FURTHER
DETAILS.

®

and Second-Stage Outdoor Fan Relay Wiring

(Non-Communicating)

RED
BLACK
PURPLE

CUT ON-BOARD LINK Y1-Y2 FOR TWO-STAGE A/C ONLY

CUT ON-BOARD LINK R-DS WHEN DEHUMIDIFICATION

CBX40UHV

CUT ON-BOARD LINK R -O.

COMFORTSENSEt
7000 THERMOSTAT

T

T

TERMINAL IS USED.

OUTDOOR

SENSOR

(X2658)

Y1-Y2

2-STAGE

COMPR

R-O

HEAT

PUMP

R-DS

DEHUM

OR

HARMONY

CUT FOR OPTION

Figure 9. Heat Pump Application — Humiditrol

(Non-Communicating)

Page 14

®

and Second-Stage Outdoor Fan Relay Wiring

CBX40UHV

Thermostat Connections

Table 2 (CBX40UHV-XXX-230-6-ALL)

Function

Indoor Control
Terminal Label

W1 (Input)

W2 (Input)

W3 (Input)

Y1 & Y2 (Input/

Output)

G (Input)

C

R The R terminal shall be capable of providing the power to the thermostat and all the associated loads.

O (Input/Output)

DS (Input)

DH (Output) The DH terminal provides a 24VAC output for dehumidification needs in communicating systems.

H (Output) The H terminal provides a 24VAC output for humidification needs in both communicating and non-communicating mode.

L (Input)

Non-Communicating

Room Thermostat

(Indoor and Outdoor -24 volts)

Indicates a first-stage heating demand.
This input is an anticipator for the ther
mostat.
Indicates a second-stage heating de
mand. W1 input must be active to recog
nize second-stage heat demand.
Indicates a third-stage heating demand.
W1 and W2 inputs must be active to rec
ognize third-stage heat demand.
Room thermostat inputs 24 volts to the
Y1 and Y2 terminals on the indoor con
trol. The 24 volt signal is then passed
through to the outdoor unit. During a
second-stage demand, both Y1 and Y2
are active. The Y1 terminal is connected
to Y2 by link (Solid jumper on control
that would be cut for 2 stage applica
tions)

Indicates a 24 volt indoor blower de
mand.

The C terminal shall interconnect the signal ground of the room thermostat with secondary transformer ground (TR) and
chassis ground (GND)

Room thermostat inputs 24 volts to the
O terminal on the indoor control. The O
terminal is connected to R by link (Solid
jumper on control that would be cut if
unit was a heat pump)

Used for Harmony III zoning systems, or
thermostat with dehumidification capa
bility. The DS terminal is connected to R
by link (Solid jumper on control that
would be cut if for the above applica
tions).
Harmony III control - This will allow the
control to vary the voltage signal to the
indoor blower motor to control required
CFM.
Dehumidification - Allow a 24 volt sig
nal on the DS to turn off and on the dehu
midification mode.

The L terminal is provided for connection to devices with Lennox System Operation Monitor (LSOM) capabilities. The control
interprets the fault signals and transmits them as an alarm message on the communication line. There are ten (10) identified
LSOM fault codes. Each is mapped to the communication Alarm codes.

Indoor Communicating

Outdoor Non-Communicating

N/A N/A

N/A N/A

N/A N/A

The room thermostat communicated
with the indoor control. The indoor con
trol outputs 24 volts on its Y1 and Y2
terminals which are hard wired to the
non-communicating outdoor unit.

In a communicating system, ”G” input to
indoor control is used by non-communi
cating IAQ devices (such as LVCS, HRV
or ERV) to ensure indoor blower de
mand.

The room thermostat communicated
with the indoor control. The indoor con
trol outputs 24 volts on its O terminals
which are hard wired to the non-com
municating outdoor unit. If there is 24
volts on O, the reversing valve will be
energized and the outdoor unit will run in
the cooling mode. If O does not have 24
volts, the outdoor unit will run in heating
mode.

N/A N/A

Full Communication

(Indoor & Outdoor)

In a full communicating system, no
wiring is required on Y1 and Y2 termi
nals.

In communicating system “G” input to
indoor control is used by non-communi
cating IAQ devices (such as LVCS, HRV
or ERV) to ensure indoor blower de
mand.

In a full communicating system, O termi
nal is not wired.

CBX40UHV

Page 15

IMPORTANT

Before changing any clippable links or jumper settings,
make sure the motor has completely stopped. Any
changes will not take place while the motor is running.

Table 3. Air Handler Control Connections —

Communicating (CBX40UHV-XXX-230-6-ALL)

Label Label Function

R 24VAC

Thermostat

Outdoor Unit

Link

Table 4. Run Length — Communicating

Wire Run Length AWG # Insulation/Core Types

Maximum length of wiring
for all connections on the
RSBus is limited to 1500
feet (457 meters).

i+ RSbus data high connection
i- RSbus data low connection

C 24VAC command (ground)
R 24VAC

i+ RSbus data high connection
i- RSbus data low connection

C 24VAC command (ground)

i+

Not used.

i-

Thermostat Wire Length

(CBX40UHV-XXX-230-6-02)

18

Color-coded, temperature
rating 95
solid core. (Class II Rated
Wiring)

º

F (35ºC) minimum,

Table 5. Run Length — Non-Communicating

(CBX40UHV-XXX-230-6-01 and -02)

Wire Run Length AWG # Insulation/Core Types

Less than 100' (30m) 18

More than 100' (30m) 16

Color-coded, temperature
rating 95
solid core. (Class II Rated
Wiring)

º

F (35ºC) minimum,

Air Handler Control 9-Pin Connector

1. Air Handler ONLY - 2-wire harness (Wired to points 7
and 8) from the factory provides 230 volt power to Air
Handler Control.

2. Air Handler with ECB40 Electric Heat - 8-wire harness
(Wired as noted in table 6)

NOTE - See Figure 4

Table 6. Stages

Position &

Wire Color

1 red Heat stage 1 relay coil

2 orange Heat stage 2 relay coil

3 yellow Relay coil return

4 black Heat stage 3 relay coil

5 brown Heat stage 4 relay coil

6 blue Heat stage 5 relay coil

7 black L1 230VAC supply from heater kit

8 red L2 230 VAC supply from heater kit

9 Not Used

Function / Description

Page 16

CBX40UHV

AIR HANDLER CONTROL BUTTON, DISPLAY AND
JUMPERS

Use figure 10 as reference for jumper settings. If any of the
reference jumpers are missing, the Air Handler Control will
display Error Code 130 as per table 13, and the Air Handler
Control will automatically use the factory default setting
show in figure 11)

Push Button

An on-board push button is provided for the purpose of
placing the Air Handler Control in different operation modes
and can be used to recall stored error codes. When button
is pushed and held, Air Handler Control will cycle through a
menu of options depending on current operating mode.
Every three seconds a new menu item will be displayed. If
the button is released while that item is shown on the
display, Air Handler Control will enter displayed operating
mode, or execute defined operation sequence for that
menu option. Once all items on menu have been displayed
the menu resumes from the beginning (if button is still held).

Delay Profile 1

Indoor blower cooling profile, delay for cooling and heat
pump operations are selected by placing the jumper in
appropriate position on five-pin header (four position
options).

S For heat pump heating operation only delay profiles 1

and 2 are applicable. If profiles 3 or 4 have been
selected, heat pump operation will use profile 1 only.

S For heat pump cooling operation all 4 profiles are

operational.

If the jumper is missing the AHC will activate the
Configuration Jumper is Missing alarm and will
automatically use the default factory setting. See figure 11
for jumper configurations.

A. When cool or heat demand is initiated, motor

ramps up to 100% and runs at 100% until demand
is satisfied.

B. Once demand is met, motor ramps down to stop.

B

100

A

Cooling — Air Conditioner and Heat Pump:

OFF

A

%CF

M
COOLING
DEMAND

Delay Profile 2

BC

100% CFM

COOL
ING

DEMAND

OFFOFF

100% CFM

45 SEC.

OFF

A. When cool demand is initiated, motor ramps up to

100% and runs at 100% until demand is satisfied.

B. Once demand is met, motor runs at 100% for 45

seconds.

C. Motor ramps down to stop.

Heating — Heat Pump only:

OFF

A

30 sec

delay

B

HEATING DEMAND

100% CFM

C

100% CFM

45 SEC.

D

A. When heat demand is initiated, 30 seconds motor

on delay starts

B. After the motor on delays expires, motor ramps up

to 100% and runs at 100% until demand is
satisfied.

C. Once demand is met, motor runs at 100% for 45

seconds.

D. Motor ramps down to stop.

Delay Profile 3

C

OFF

B

A

7 1/2 MIN

82%CFM

COOLING DEMAND

100% CFM

A. When cool demand is initiated, motor ramps up to

82%

B. Motor runs at 82% for approximately 7.5 minutes

and then ramp up to 100% (unless the demand has
been satisfied) and motor runs at 100% until
demand is satisfied.

C. Once demand is met, motor ramps down to stop

Delay Profile 4

C

OFF

A

B

1/2 MIN
50% CFM

7 1/2 MIN
82% CFM

COOLING DEMAND

100%
CFM

D

1/2 MIN
50% CFM

E

A. When cool demand is initiated, motor ramps up to

50%

B. Motor runs at 50% for 30 seconds and ramps up to

82%

C. Motor runs at 82% for approximately 7.5 minutes

and then ramp up to 100% (unless the demand has
been satisfied) and motor runs at 100% until
demand is satisfied.

D. Once demand is met, motor runs at 50% for 30

seconds.

E. Motor ramps down to stop

OFF

OFF

OFF

CBX40UHV

Page 17

CBX40UHV JUMPER & LINK GUIDE

*

1−STG COMPRESSOR

2−STG COMPRESSOR

COOLING MODE
BLOWER SPEED

(COOLING & HP MODE)

HIGH

SPEED

1

2

3

4

*

MEDIUM−HIGH

SPEED

1

2

3

4

MEDIUM−LOW

SPEED

1

2

3

4

LOW

SPEED

1

2

3

4

FUSE 3 AMP

F1

3

XFMR

24V

24 VAC

COM

3

6

9

XFM LINE

1

4

7

BLOWER

ADJUST SELECTION

*

NORMAL

NORM

+

−

(+ 10%)

SETTING

NORM

+

−

(−10%)

SETTING

NORM

+

−

HEATING MODE

BLOWER SPEED

(ELECTRIC HT MODE)

*

HIGH

SPEED

1

2

3

4

MEDIUM−HIGH

SPEED

1

2

3

4

MEDIUM−LOW

SPEED

1

2

3

4

LOW

SPEED

J7

J9

J10

NORM + −

1

2

3

HEAT

1234

COOL

1234

DELAY

1234

ADJUST

4

PUSH

BUTTON

HUMIDIFICATION

J8

SMART AUTO

EVENHEAT

BLOWER

J11

ONLY CFM

1234

85

COOLING MODE

BLOWER RAMPING

(COOLING MODE UNLESS NOTED)

*

DELAY

PROFILE #4
OFF−50%−82%−
100%−50%−OFF

DELAY

PROFILE #3

OFF−82%−100%−OFF

DELAY

PROFILE #2
CLG
OFF−100%−100%−OFF
HP
OFF−30sOFF−100%−100% OFF

DELAY

PROFILE #1

OFF−100%−OFF

1

2

3

4

1

2

3

4

1

2

3

4

1

2

3

4

7−SEGMENT

LED DISPLAY

CUT FOR OPTION

Y1−Y2

2−STAGE

COMPR

J5

J4

115

100

130

OUTDOOR

SENSOR

FUTURE

USE

CONTINUOUS FAN

MODE BLOWER SPEED

MEDIUM−HIGH

MEDIUM−LOW

*

ON−BOARD LINK

OPTION SELECTION

1

OR

PUMP

DEHUM

R−O

HEAT

R−DS

HARMONY

DISCHARGE

AIR SENSOR

FACTORY

JUMPER

HIGH
SPEED
(100%)

1

SPEED

(70%)

1

SPEED

(38%)

1

LOW

SPEED

(28%)

1

2−STAGE

(JUMPERS Y1 to Y2)

COMPRESSOR LINK

HEAT PUMP LINK

(JUMPERS R to O)

HARMONY LINK

(JUMPERS R to DS)

DEHUMIDIFICATION−

STANDARD HEAT MODE

(STAGED BY TSTAT)

W3

W1 W2 G Y2 Y1 C R DH H L O DS

DEGREE TARGET

TEMPERATURE

2

3

4

2

3

4

2

3

4

2

3

4

Y1−Y2

DO NOT CUT

COMPR

2 STAGE

A/C UNIT

*

DO NOT CUT

R−0

HEAT

PUMP

NO HARMONY ZONING

*

OR NO

COMFORTSENSE 7000

W/ DS CONNECTION

DO NOT CUT

R−DS

DEHUM

−CUT ON−BOARD LINK (SOLDER TRACE)

1

THROUGH BOTH LAYERS ON THE CONTROL BOARD
IMPORTANT: USE CARE WHEN CUTTING LINKS TO

PREVENT DAMAGE TO CONTROL.

Y1−Y2

COMPR

2 STAGE

HEAT PUMP UNIT

CUT LINK

1

HARMONY ZONING

C0MFORTSENSE 7000

W/ DS CONNECTION

HARMONY

1

CUT LINK

or

COMPLETELY

CUT LINK

R−0

HEAT

OR

HUMIDIFICATION MODE

HUMIDIFICATION MODE

24VAC OUTPUT ON ”H”

(DEFAULT)

STANDARD

HEAT MODE

85

110

115

130

EVENHEATER® MODE

−ENABLED WITH OPTIONAL
DISCHARGE AIR SENSOR

*

85

DISCHARGE

100

DEGREE

TARGET

115

DEGREE

TARGET

130

DEGREE

TARGET

85

110

115

130

85

110

115

130

85

110

115

130

85

110

115

130

FACTORY DEFAULT SETTING

*

FOR HUMIDIFIER OR

ACCESSORY INTERLOCK

*

SMART MODE

− ”H” ENABLED WHEN
HEAT ACTIVE

(HP or ELECT. HT)

AUTO MODE

− ”H” ENABLED WHEN

BLOWER ACTIVE

& NO CLG
OR DEHUM

PUMP

SMART

SMART

R−DS

1

or

DEHUM

HARMONY

AUTO

AUTO

Figure 11. CBX40UHV-XXX-230-6-01

Page 18

CBX40UHV

JUMPER & LINK GUIDE

COOLING MODE

BLOWER SPEED

(COOLING & HP MODE)

HIGH

SPEED

1

2

3

*

MEDIUM-HIGH

SPEED

1

2

3

MEDIUM-LOW

SPEED

1

2

3

LOW

SPEED

1

2

3

4

4

4

4

HEATING MODE

BLOWER SPEED

(ELECTRIC HT MODE)

*

HIGH

SPEED

1

2

3

MEDIUM-HIGH

SPEED

1

2

3

4

MEDIUM-LOW

SPEED

1

2

3

4

LOW

SPEED

1

2

3

4

4

PUSH

BUTTON

ON-BOARD LINK

OPTION SELECTION

1

2-STAGE

(JUMPERS Y1 to Y2)

COMPRESSOR LINK

HEAT PUMP LINK

(JUMPERS R to O)

HARMONY LINK

(JUMPERS R to DS)

DEHUMIDIFICATION-

*

1-STG COMPRESSOR

Y1-Y2

DO NOT CUT

COMPR

2 STAGE

A/C UNIT

*

DO NOT CUT

R-0

HEAT

NO HARMONY ZONING

*

OR NO

COMFORTSENSE 7000

W/ DS CONNECTION

DO NOT CUT

PUMP

R-DS

or

DEHUM

2-STG COMPRESSOR

Y1-Y2

2 STAGE

HEAT PUMP UNIT

CUT LINK

1

HARMONY ZONING

C0MFORTSENSE 7000

W/ DS CONNECTION

1

CUT LINK

HARMONY

CUT LINK

COMPR

R-0

HEAT

OR

PUMP

R-DS

1

or

DEHUM

HARMONY

FUSE 3 AMP

XFMR24V

24 VAC

COM

2

3

6

5

9

8

XFMR LINE

L2

L2

G

EARTH

INDOOR BLOWER
SIGNAL

456
12 3

BLOWER

ADJUST SELECTION

*

NORMAL

+

NORM

(+ 10%)

SETTING

+

NORM

(-10%)

SETTING

NORM+-

-

-

1

4

7

1234

1234

P8

L1

L1

INDOOR
BLOWER
POWER

I +

1234

ADJUST

NORM +

I + I -RC

OUTDOOR UNIT

I -

LINK

COOLING BLOWER RAMPING

(COOLING MODE UNLESS NOTED)

DELAYPROFILE #4

*

OFF-50%-82%­100%-50%-OFF

PROFILE #3

DELAY

OFF-82%-100%-OFF

DELAY

PROFILE #2

CLG

OFF  100%  DEMAND
SATISFIED  100% FOR 45
SECONDS  OFF

HP

OFF  30 SECOND DELAY 
100%  DEMAND
SATISFIED  100% FOR 45
SECOND  OFF

DELAY

PROFILE #1

OFF-100%-OFF

HEAT

COOL

DELAY

-

7-SEGMENT LED

HUMIDITROL

DH

C

HUMIDIFICATION

AUTO

SMART

EVENHEAT

85

100

BLOWER

ONLY CFM

1234

I + I -RC

THERMOSTAT

1

1

1

1

115

2

2

2

2

130

3

4

3

3

3

Y1-Y2

OUTDOOR

AIR SENSOR

4

4

4

2-STAGE

COMPR

R-O

HEAT

PUMP

DISCHARGE
AIR SENSOR

CONTINUOUS FAN

BLOWER SPEED

HIGH

SPEED

(100%)

MEDIUM-HIGH

SPEED

(70%)

* MEDIUM-LOW

SPEED

(38%)

LOW

SPEED

(28%)

OR

R-DS

DEHUM

HARMONY

-CUT ON-BOARD LINK (SOLDER TRACE) COMPLETELY

THROUGH BOTH LAYERS ON THE CONTROL BOARD

1

IMPORTANT: USE CARE WHEN CUTTING LINKS TO

PREVENT DAMAGE TO CONTROL.

DS

O

L

H

DH

R

C

Y1

Y2

G

W3

W2

W1

FACTORY

JUMPER

1

2

3

4

1

2

3

4

1

2

3

4

1

2

3

4

STANDARD HEAT MODE

(DEFAULT)

STANDARD

HEAT MODE

(STAGED BY TSTAT)

EVENHEATER MODE

-ENABLED WITH OPTIONAL
DISCHARGE AIR SENSOR

*

85

DEGREE TARGET

DISCHARGE

TEMPERATURE

100
DEGREE
TARGET

115
DEGREE
TARGET

130

DEGREE

TARGET

* INDICATES FACTORY DEFAULT SETTING

85

110

115

85

85

85

85

130

110

110

110

110

115

115

115

115

130

130

130

130

HUMIDIFICATION MODE

HUMIDIFICATION MODE
24VAC OUTPUT ON ”H”

FOR HUMIDIFIER OR

ACCESSORY INTERLOCK

*

SMART MODE

- ”H” ENABLED WHEN
HEAT ACTIVE

(HP or ELECT. HT)

AUTO MODE

- ”H” ENABLED WHEN

BLOWER ACTIVE

& NO CLG
OR DEHUM

SMART

SMART

AUTO

AUTO

CBX40UHV

Figure 12. Air Handler Configuration (CBX40UHV-XXX-230-6-02 or higher)

Page 19