Lennox CBX32MV, CBX32MV-048, CBX32MV-060, CBX32MV-068 Series Manual

Download

Service Literature

CBX32MV (HFC−410A) SERIES UNITS

TABLE OF CONTENTS

Introduction 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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

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

Blower Performance 4. . . . . . . . . . . . . . . . . . . . . . . . . . .

Parts Arrangement 10. . . . . . . . . . . . . . . . . . . . . . . . . . . .

I− Application 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

II− Unit Components 11. . . . . . . . . . . . . . . . . . . . . . . . . . .

III− Troubleshooting the Variable Speed Motor 15. . . . .

IV− Optional Electric Heat 17. . . . . . . . . . . . . . . . . . . . . . .

V− Optional Humidity Control 23. . . . . . . . . . . . . . . . . . . .

VI− Configuration Modifications 30. . . . . . . . . . . . . . . . . .

VII− Start Up Operation 34. . . . . . . . . . . . . . . . . . . . . . . . .

VIII− Operating Characteristics 35. . . . . . . . . . . . . . . . . .

XI− Maintenance 35. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

X− Wiring and Operation Sequence 36. . . . . . . . . . . . . .

Corp. 0206−L3

Revised 02−2010

CBX32MV

Introduction

The CBX32MV is a high efficiency residential split system blower/coil featuring a variable speed motor controlled by an electronic blower drive control (BDC).

CBX32MV series units are designed to be matched with Lennox two-speed or single-speed HFC−410A condensing units and heat pumps. Several models are available in sizes ranging from 1.5 through 5 tons. All units are equipped with factory installed check and expansion valve for cooling or heat pump applications.

Electric heat is available in several voltages and KW sizes, and can be field installed in the cabinet.

Some CBX32MV applications may include the optional Lennox ComfortSense Efficiency Plus Comfort Management Control (CCB1). The purpose of both controls is to vary indoor blower speed in response to indoor dehumidification demand. When a two-speed outdoor unit is used, compressor speed can also be controlled by the SignatureStat or CCB1 in response to indoor dehumidification demand.

Information contained in this manual is intended for use by experienced HVAC service technicians only. All specifications are subject to change. Procedures outlined in this manual are presented as a recommendation only and do not supersede or replace local or state codes.

7000, SignatureStatt or

WARNING

Electric shock hazard. Can cause injury or death. Before attempting to perform any service or maintenance, turn the electrical power to unit OFF at disconnect switch(es). Unit may have multiple power supplies.

ELECTROSTATIC DISCHARGE (ESD)

Precautions and Procedures

CAUTION

Electrostatic discharge can affect electronic components. Take precautions during unit installation and service to protect the unit’s electronic controls. Precautions will help to avoid control exposure to electrostatic 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 performing any service procedure.

Page 1

2002 Lennox Industries Inc.

Model Number Identification

Unit Type

CB = Air Handler

Refrigerant Type

X = R−410A

Series

Configuration

MV = Multi−Position, Variable

speed blower motor

Nominal Cooling Capacity

018/024 = 1.5 to 2 tons (5.3 to 7 kW) 024/030 = 2 to 2.5 tons (7 to 8.8 kW) 036 = 3 tons (10.6 kW) 048 = 4 tons (14.1 kW) 060 = 5 tons (17.6 kW) 068 = 5+ tons (17.6+ kW)

−

230CB 32 036

−−

Minor Revision Number

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

Specifications

General Data Model Number CBX32MV-018/024 CBX32MV-024/030 CBX32MV-036

Connections in. (mm)

Nominal cooling capacity − tons (kW)

Refrigerant

Suction (vapor) line − sweat

Liquid line − sweat

1.5 − 2 (5.3 − 7) 2 − 2.5 (7 − 8.8) 3 (10.6)

R−410A R−410A R−410A

5/8 (15.8) 3/4 (19) 3/4 (19)

3/8 (9.5) 3/8 (9.5) 3/8 (9.5)

Condensate drain (fpt)

Indoor Coil

Blower Data

Filters

Shipping Data − 1 Package lbs. (kg) 126 (57) 152 (69) 183 (83)

ELECTRICAL DATA

Voltage − phase − 60hz 208/230V−1ph

Maximum overcurrent protection (unit only) 15 15 15

Minimum circuit ampacity (unit only) 5 5 5

Tube outside diameter − in. (mm)

Wheel nominal diameter x width − in. (mm)

Net face area − ft.2 (m2)

Number of rows

Fins per inch (fins per m)

Motor output − hp (W)

Number and size − in.

(2) 3/4 (19) (2) 3/4 (19) (2) 3/4 (19)

3.56 (0.33) 4.44 (0.41) 5.0 (0.46)

3/8 (9.5) 3/8 (9.5) 3/8 (9.5)

3 3 3

12 (472) 12 (472) 12 (472)

10 x 7 (279 x 178) 10 x 8 (279 x 203) 10 x 8 (279 x 203)

1/2 (373) 1/2 (373) 1/2 (373)

(1) 15 x 20 x 1 (1) 20 x 20 x 1 (1) 20 x 22 x 1

381 x 508 x 25 508 x 508 x 25 508 x 559 x 25

208/230V−1ph 208/230V−1ph

Page 2

Specifications

General Data Model Number CBX32MV-048 CBX32MV-060 CBX32MV-068

Nominal cooling capacity − tons (kW)

4 (14.1) 5 (17.6) 5+ (17.6+)

Connections in. (mm)

Indoor Coil

Blower Data

Filters

Refrigerant

Suction (vapor) line − sweat

Liquid line − sweat

Condensate drain (fpt)

Net face area − ft.2 (m2)

Tube outside diameter − in. (mm)

Number of rows

Fins per inch (fins per m)

Wheel nominal diameter x width − in. (mm)

Motor output − hp (W)

Number and size − in.

R−410A R−410A R−410A

7/8 (22.2) 1-1/8 (28) 1-1/8 (28)

3/8 (9.5) 3/8 (9.5) 3/8 (9.5)

(2) 3/4 (19) (2) 3/4 (19) (2) 3/4 (19)

7.22 (0.67) 7.22 (0.67) 7.77 (0.72)

3/8 (9.5) 3/8 (9.5) 3/8 (9.5)

3 3 3

12 (472) 12 (472) 12 (472)

12 x 9 (305 x 229) 12 x 9 (305 x 229) 15 x 9 (381 x 229)

1 (746) 1 (746) 1 (746)

(1) 20 x 24 x 1 (1) 20 x 24 x 1 (1) 20 x 25 x 1

508 x 610 x 25 508 x 610 x 25 508 x 635 x 25

Shipping Data − 1 Package − lbs. (kg) 212 (96) 212 (96) 244 (111)

ELECTRICAL DATA

Voltage − phase − 60hz 208/230V−1ph

Maximum overcurrent protection (unit only) 20 20 20

208/230V−1ph 208/230V−1ph

Minimum circuit ampacity (unit only) 11 11 11

Optional CIRCUIT BREAKER KITS − Must Be Ordered Extra

Amperage 25 30 35 40 45 50 60

Single Phase 23M58 23M59 23M60 23M61 23M62 23M63 23M64

Three Phase − − − 23M65 − − − 23M66 23M67 23M68 23M69

Page 3

Blower Data

CBX32MV-018/024 BLOWER PERFORMANCE 0 through 0.80 in. w.g. (0 through 200 Pa) External Static Pressure Range

BDC3 Jumper Speed Positions

ADJUST"

Jumper

Setting

+ 715 337 855 405 1000 470 1130 535 465 220 690 325 900 425 1050 495

NORM 670 315 770 365 900 425 1035 490 425 200 620 290 825 390 950 450

− 580 275 700 330 800 375 930 440 385 180 560 265 735 345 850 400

NOTES − The effect of static pressure, filter and electric heater resistance is included in the air volumes listed.

Low speed cooling air volume is 70% of COOL speed setting. Production units September 2005 and later; continuous blower speed for is approximately 38% of COOL speed setting. Earlier production units continuous blower speed is approximately 50% of COOL speed setting. Harmony Zone Control applications − Low speed cooling is approximately 250 cfm (118 L/s). Lennox Harmony IIIt Zone Control applications − Low speed cooling is 300 cfm (145 L/s)

1 2 3 4 1 2 3 4

cfm L/s cfm L/s cfm L/s cfm L/s cfm L/s cfm L/s cfm L/s cfm L/s

CBX32MV-018/024 BLOWER MOTOR WATTS AT +" (Plus) BDC3 SETTING (Adjust" Jumper at +" Setting)

BDC3 Jumper

Speed Positions

HEAT" Speed

COOL" Speed

Tap 1 100 113 126 142 154 172 190 206 230

Tap 2 155 176 197 221 237 260 278 295 310

Tap 3 237 260 289 305 314 337 356 373 390

Tap 4 338 361 379 409 433 457 447 426 406

Tap 1 36 47 61 71 81 95 106 118 135

Tap 2 89 103 11 8 129 143 163 177 197 207

Tap 3 183 198 229 248 266 290 307 327 343

Tap 4 266 294 315 330 349 373 390 411 401

HEAT" Speed COOL" Speed

Motor Watts @ Various External Static Pressures − in. wg. (Pa)

0 (0) 0.1 (25) 0.2 (50) 0.3 (75) 0.4 (100) 0.5 (125) 0.6 (150) 0.7 (175) 0.8 (200)

CBX32MV-018/024 BLOWER MOTOR WATTS AT NORM" BDC3 SETTING (Adjust" Jumper at NORM Setting)

Motor Watts @ Various External Static Pressures − in. wg. (Pa)

Speed Positions

HEAT" Speed

COOL" Speed

BDC3 Jumper

0 (0) 0.1 (25) 0.2 (50) 0.3 (75) 0.4 (100) 0.5 (125) 0.6 (150) 0.7 (175) 0.8 (200)

Tap 1 77 96 106 123 130 150 165 178 201

Tap 2 118 136 154 177 189 212 224 247 265

Tap 3 183 198 224 248 264 284 307 321 343

Tap 4 264 284 300 326 343 367 385 406 390

Tap 1 30 41 55 62 76 86 94 106 11 4

Tap 2 71 83 101 11 3 125 138 156 166 185

Tap 3 137 158 176 199 219 238 254 273 296

Tap 4 211 225 249 272 295 318 331 342 367

CBX32MV-018/024 BLOWER MOTOR WATTS AT −" (Minus) BDC3 SETTING (Adjust" Jumper at −" Setting)

Motor Watts @ Various External Static Pressures − in. wg. (Pa)

Speed Positions

HEAT" Speed

BDC3 Jumper

0 (0) 0.1 (25) 0.2 (50) 0.3 (75) 0.4 (100) 0.5 (125) 0.6 (150) 0.7 (175) 0.8 (200)

Tap 1 59 73 89 106 113 130 142 156 173

Tap 2 95 106 11 8 136 152 171 183 200 215

Tap 3 132 148 171 186 211 225 248 266 284

Tap 4 195 217 242 259 283 302 314 336 349

COOL" Speed

Tap 1 27 35 47 59 71 77 88 92 106

Tap 2 57 65 83 94 110 119 134 148 166

Tap 3 110 124 141 157 176 188 213 231 242

Tap 4 148 170 195 207 230 248 272 282 306

Page 4

CBX32MV-024/030 BLOWER PERFORMANCE 0 through 0.80 in. w.g. (0 through 200 Pa) External Static Pressure Range

BDC3 Jumper Speed Positions

ADJUST"

Jumper

Setting

+ 800 380 935 440 1070 505 1210 570 660 310 880 415 1100 520 1320 625

NORM 725 340 850 400 975 460 1100 520 600 285 800 380 1000 470 1200 565

− 655 310 765 360 880 415 990 470 540 255 720 340 900 425 1080 510

NOTES − The effect of static pressure, filter and electric heater resistance is included in the air volumes listed.

Low speed cooling air volume is 70% of COOL speed setting. Production units September 2005 and later; continuous blower speed for is approximately 38% of COOL speed setting. Earlier production units continuous blower speed is approximately 50% of COOL speed setting. Harmony Zone III Control applications − Low speed cooling is approximately 300 cfm (145 L/s).

1 2 3 4 1 2 3 4

cfm L/s cfm L/s cfm L/s cfm L/s cfm L/s cfm L/s cfm L/s cfm L/s

HEAT" Speed COOL" Speed

CBX32MV-024/030 BLOWER MOTOR WATTS AT +" (Plus) BDC3 SETTING (Adjust" Jumper at +" Setting)

Motor Watts @ Various External Static Pressures − in. wg. (Pa)

Speed Positions

HEAT" Speed

BDC3 Jumper

0 (0) 0.1 (25) 0.2 (50) 0.3 (75) 0.4 (100) 0.5 (125) 0.6 (150) 0.7 (175) 0.8 (200)

Tap 1 65 90 120 145 185 210 240 250 275

Tap 2 95 125 150 185 230 265 310 345 365

Tap 3 140 190 225 250 290 320 350 405 450

Tap 4 215 250 285 315 350 390 440 480 505

COOL" Speed

Tap 1 45 60 90 120 140 155 165 185 200

Tap 2 80 110 135 165 205 250 285 315 335

Tap 3 150 195 225 260 295 320 370 425 465

Tap 4 265 315 350 400 440 485 525 555 605

CBX32MV-024/030 BLOWER MOTOR WATTS AT NORM" BDC3 SETTING (Adjust" Jumper at NORM Setting)

Motor Watts @ Various External Static Pressures − in. wg. (Pa)

Speed Positions

HEAT" Speed

COOL" Speed

BDC3 Jumper

0 (0) 0.1 (25) 0.2 (50) 0.3 (75) 0.4 (100) 0.5 (125) 0.6 (150) 0.7 (175) 0.8 (200)

Tap 1 50 75 100 135 155 180 195 215 230

Tap 2 80 105 130 155 200 245 265 295 310

Tap 3 110 150 175 200 235 275 320 350 390

Tap 4 155 205 230 270 290 325 360 405 460

Tap 1 40 55 80 105 120 130 150 165 180

Tap 2 65 90 120 145 190 210 240 260 285

Tap 3 105 145 175 220 250 285 335 370 405

Tap 4 200 245 275 300 335 385 420 470 515

CBX32MV-024/030 BLOWER MOTOR WATTS AT −" (Minus) BDC3 SETTING (Adjust" Jumper at −" Setting)

Motor Watts @ Various External Static Pressures − in. wg. (Pa)

Speed Positions

HEAT" Speed

BDC3 Jumper

0 (0) 0.1 (25) 0.2 (50) 0.3 (75) 0.4 (100) 0.5 (125) 0.6 (150) 0.7 (175) 0.8 (200)

Tap 1 45 65 90 110 130 150 165 190 195

COOL" Speed

Tap 2 60 85 110 145 175 200 215 235 240

Tap 3 85 105 130 165 210 245 280 305 330

Tap 4 115 145 175 205 230 280 325 370 390

Tap 1 30 50 70 90 100 115 125 140 165

Tap 2 55 75 100 135 155 185 190 210 225

Tap 3 85 115 135 175 210 255 295 320 345

Tap 4 145 175 215 245 280 325 355 410 450

Page 5

CBX32MV-036 BLOWER PERFORMANCE 0 through 0.80 in. w.g. (0 through 200 Pa) External Static Pressure Range

BDC3 Jumper Speed Positions

ADJUST"

Jumper

Setting

+ 1230 580 1335 630 1445 680 1545 730 1090 515 1225 580 1380 650 1545 730

NORM 1120 530 1215 575 1315 620 1400 660 975 460 1125 530 1275 600 1400 660

− 1010 475 1185 560 1200 565 1265 595 900 425 1000 470 1135 535 1265 595

NOTES − The effect of static pressure, filter and electric heater resistance is included in the air volumes listed.

Low speed cooling air volume is 70% of COOL speed setting (65% COOL speed for production prior to August 2002). Production units September 2005 and later; continuous blower speed for is approximately 38% of COOL speed setting. Earlier production units continuous blower speed is approximately 50% of COOL speed setting. Harmony Zone Control applications − Low speed cooling is approximately 380 cfm (178 L/s). Lennox Harmony IIIt Zone Control applications − minimum blower speed is 442 cfm (210 L/s).

1 2 3 4 1 2 3 4

cfm L/s cfm L/s cfm L/s cfm L/s cfm L/s cfm L/s cfm L/s cfm L/s

HEAT" Speed COOL" Speed

CBX32MV-036 BLOWER MOTOR WATTS AT +" (Plus) BDC3 SETTING (Adjust" Jumper at +" Setting)

Motor Watts @ Various External Static Pressures − in. wg. (Pa)

Speed Positions

HEAT" Speed

BDC3 Jumper

0 (0) 0.1 (25) 0.2 (50) 0.3 (75) 0.4 (100) 0.5 (125) 0.6 (150) 0.7 (175) 0.8 (200)

Tap 1 220 235 265 290 310 335 360 385 465

Tap 2 285 305 330 355 380 405 430 450 475

Tap 3 345 365 405 430 455 485 515 545 570

Tap 4 470 495 515 530 545 560 575 595 610

COOL" Speed

Tap 1 145 165 200 225 250 275 300 325 350

Tap 2 225 245 265 290 320 350 370 395 410

Tap 3 305 325 350 390 420 445 475 505 535

Tap 4 470 495 515 530 545 560 575 595 610

CBX32MV-036 BLOWER MOTOR WATTS AT NORM" BDC3 SETTING (Adjust" Jumper at NORM Setting)

Motor Watts @ Various External Static Pressures − in. wg. (Pa)

Speed Positions

HEAT" Speed

COOL" Speed

BDC3 Jumper

0 (0) 0.1 (25) 0.2 (50) 0.3 (75) 0.4 (100) 0.5 (125) 0.6 (150) 0.7 (175) 0.8 (200)

Tap 1 155 185 215 240 265 285 300 335 355

Tap 2 225 245 270 295 325 345 370 390 415

Tap 3 275 290 315 340 375 400 420 445 465

Tap 4 320 345 375 405 435 460 485 515 540

Tap 1 120 140 160 190 210 230 255 275 300

Tap 2 160 190 220 240 265 290 320 340 365

Tap 3 255 270 295 320 345 375 400 420 445

Tap 4 320 345 375 405 435 460 485 515 540

CBX32MV-036 BLOWER MOTOR WATTS AT −" (Minus) BDC3 SETTING (Adjust" Jumper at −" Setting)

Motor Watts @ Various External Static Pressures − in. wg. (Pa)

Speed Positions

HEAT" Speed

BDC3 Jumper

0 (0) 0.1 (25) 0.2 (50) 0.3 (75) 0.4 (100) 0.5 (125) 0.6 (150) 0.7 (175) 0.8 (200)

Tap 1 120 135 165 185 205 225 245 265 300

COOL" Speed

Tap 2 140 165 195 215 245 270 300 315 335

Tap 3 185 210 240 265 285 310 330 360 385

Tap 4 245 255 290 310 335 355 380 405 430

Tap 1 90 110 135 155 180 195 210 230 250

Tap 2 120 140 160 185 215 235 255 275 295

Tap 3 160 190 225 240 275 295 320 350 380

Tap 4 245 255 290 310 335 355 380 405 430

Page 6

CBX32MV-048 AND CBX32MV-060 BLOWER PERFORMANCE 0 through 0.80 in. w.g. (0 Through 200 Pa) External Static Pressure Range

BDC3 Jumper Speed Positions

ADJUST"

Jumper

Setting

+ 1850 875 1960 925 2090 985 2150 1015 1625 765 1820 860 2055 970 2145 1010

NORM 1705 805 1800 850 1900 895 2005 945 1425 670 1625 765 1805 850 2005 945

− 1560 735 1625 765 1720 810 1770 835 1205 570 1375 650 1555 735 1725 815

NOTES − The effect of static pressure, filter and electric heater resistance is included in the air volumes listed.

Low speed cooling air volume is 70% of COOL speed setting (60% of COOL speed for production prior to August 2002). Production units September 2005 and later;continuous blower speed for is approximately 38% of COOL speed setting. Earlier production units continuous blower speed is approximately 50% of COOL speed setting. Harmony Zone Control applications − Low speed cooling is approximately 400 cfm (190 L/s). Lennox Harmony IIIt Zone Control applications − minimum blower speed is 442 cfm (210 L/s)

1 2 3 4 1 2 3 4

cfm L/s cfm L/s cfm L/s cfm L/s cfm L/s cfm L/s cfm L/s cfm L/s

HEAT" Speed COOL" Speed

CBX32MV-048 AND CBX32MV-060 BLOWER MOTOR WATTS AT +" (Plus) BDC3 SETTING (Adjust" Jumper at +" Setting)

BDC3 Jumper Speed

HEAT"

Speed

Positions

Tap 1 455 505 540 585 630 665 710 745 780

Tap 2 555 595 645 675 730 780 820 865 895

Tap 3 680 720 770 820 865 900 945 985 1030

Tap 4 730 780 825 870 920 970 1020 1055 1110

0 (0) 0.1 (25) 0.2 (50) 0.3 (75) 0.4 (100) 0.5 (125) 0.6 (150) 0.7 (175) 0.8 (200)

Motor Watts @ Various External Static Pressures − in. wg. (Pa)

COOL"

Speed

Tap 1 300 335 370 360 435 465 500 535 575

Tap 2 425 475 500 545 585 635 670 710 745

Tap 3 625 660 705 755 810 850 885 940 970

Tap 4 700 750 800 845 895 940 990 1030 1080

CBX32MV-048 AND CBX32MV-060 BLOWER MOTOR WATTS AT NORM" BDC3 SETTING (Adjust" Jumper at NORM Setting)

BDC3 Jumper Speed

Positions

HEAT"

Speed

COOL"

Speed

0 (0) 0.1 (25) 0.2 (50) 0.3 (75) 0.4 (100) 0.5 (125) 0.6 (150) 0.7 (175) 0.8 (200)

Tap 1 360 385 425 465 495 525 565 600 635

Tap 2 400 440 485 520 555 595 640 670 705

Tap 3 480 520 560 605 640 685 765 785 805

Tap 4 580 625 665 710 760 800 835 875 925

Tap 1 215 235 275 295 330 360 400 430 465

Tap 2 310 335 375 405 440 465 500 530 565

Tap 3 415 445 490 535 565 605 650 675 715

Tap 4 580 610 655 695 740 785 830 870 910

Motor Watts @ Various External Static Pressures − in. wg. (Pa)

CBX32MV-048 AND CBX32MV-060 BLOWER MOTOR WATTS AT −" (Minus) BDC3 SETTING (Adjust" Jumper at −" Setting)

BDC3 Jumper Speed

Positions

HEAT"

Speed

COOL"

Speed

0 (0) 0.1 (25) 0.2 (50) 0.3 (75) 0.4 (100) 0.5 (125) 0.6 (150) 0.7 (175) 0.8 (200)

Tap 1 265 305 340 370 410 440 460 505 540

Tap 2 320 350 395 420 450 475 515 545 580

Tap 3 375 410 435 470 515 545 575 610 645

Tap 4 400 435 480 525 555 595 640 670 700

Tap 1 140 170 195 215 250 275 300 335 360

Tap 2 200 230 260 285 315 355 385 415 450

Tap 3 280 315 340 380 415 445 465 505 540

Tap 4 375 420 440 475 515 550 575 610 645

Motor Watts @ Various External Static Pressures − in. wg. (Pa)

Page 7

CBX32MV-068 BLOWER PERFORMANCE 0 through 0.80 in. w.g. (0 Through 200 Pa) External Static Pressure Range

BDC3 Jumper Speed Positions

HEAT" Speed COOL" Speed

ADJUST"

Jumper

Setting

1 2 3 4 1 2 3 4

cfm L/s cfm L/s cfm L/s cfm L/s cfm L/s cfm L/s cfm L/s cfm L/s

+ 1875 885 1975 930 2090 985 2150 1015 1640 775 1840 870 2075 980 2150 1015

NORM 1760 830 1825 860 1920 905 2030 960 1465 690 1625 765 1800 850 2000 945

− 1550 730 1650 780 1725 815 1800 850 1250 590 1390 655 1560 735 1720 810

NOTES − The effect of static pressure, filter and electric heater resistance is included in the air volumes listed.

First stage cooling air volume is 60% of COOL speed setting. Production units September 2005 and later;continuous blower speed for is approximately 38% of COOL speed setting. Earlier production units continuous blower speed is approximately 50% of COOL speed setting. Lennox Harmony IIIt Zone Control applications − minimum blower speed is 442 cfm (210 L/s).

CBX32MV-068 BLOWER MOTOR WATTS AT +" (Plus) BDC3 SETTING (Adjust" Jumper at +" Setting)

BDC3 Jumper Speed

Positions

HEAT"

Speed

Tap 1 365 410 455 495 545 610 660 725 790

Tap 2 430 485 540 590 640 690 765 835 865

0 (0) 0.1 (25) 0.2 (50) 0.3 (75) 0.4 (100) 0.5 (125) 0.6 (150) 0.7 (175) 0.8 (200)

Motor Watts @ Various External Static Pressures − in. wg. (Pa)

Tap 3 540 585 635 695 750 800 815 840 865

Tap 4 665 710 755 770 790 810 830 845 870

COOL"

Speed

Tap 1 255 290 320 365 415 455 505 550 590

Tap 2 355 390 425 475 515 580 630 695 750

Tap 3 505 565 610 70 715 790 815 845 865

Tap 4 725 745 755 770 790 810 830 850 870

CBX32MV-068 BLOWER MOTOR WATTS AT NORM" BDC3 SETTING (Adjust" Jumper at NORM Setting)

BDC3 Jumper Speed

Positions

HEAT"

Speed

Tap 1 310 345 385 425 465 510 560 610 665

Tap 2 345 385 420 460 500 620 615 680 735

0 (0) 0.1 (25) 0.2 (50) 0.3 (75) 0.4 (100) 0.5 (125) 0.6 (150) 0.7 (175) 0.8 (200)

Motor Watts @ Various External Static Pressures − in. wg. (Pa)

Tap 3 385 430 480 525 580 640 695 750 815

Tap 4 475 525 560 615 660 720 785 845 810

COOL"

Speed

Tap 1 180 205 240 285 325 365 405 435 480

Tap 2 250 285 320 355 410 455 505 535 585

Tap 3 345 375 415 460 505 560 610 670 735

Tap 4 445 510 560 595 665 725 790 845 865

CBX32MV-068 BLOWER MOTOR WATTS AT −" (Minus) BDC3 SETTING (Adjust" Jumper at −" Setting)

BDC3 Jumper Speed

Positions

HEAT"

Speed

Tap 1 215 245 285 325 375 415 460 495 540

Tap 2 255 295 325 370 410 460 510 545 580

0 (0) 0.1 (25) 0.2 (50) 0.3 (75) 0.4 (100) 0.5 (125) 0.6 (150) 0.7 (175) 0.8 (200)

Motor Watts @ Various External Static Pressures − in. wg. (Pa)

Tap 3 295 330 375 395 445 495 555 600 660

Tap 4 335 370 400 445 505 550 600 660 705

COOL"

Speed

Tap 1 125 150 170 210 245 270 300 340 370

Tap 2 160 185 225 255 300 335 365 415 450

Tap 3 225 245 280 320 370 420 460 510 545

Tap 4 290 325 355 400 445 490 545 595 650

Page 8

Parts Arrangement

ELECTRIC HEAT

SECTION

CBX32MV

BLOWER ACCESS

PANEL

COIL ACCESS

PANEL

CONTROL BOX

BLOWER

COMPARTMENT

HORIZONTAL

DRAIN PAN

COIL

CHECK AND EXPANSION VALVE

(COMPLETE WITH SCREEN)

UPFLOW/DOWNFLOW DRAIN PAN

FIGURE 1

SMALL ELECTRIC HEAT

KNOCK OUT FOR

2.5 − 15 kW

GROUNDING

LUGS

CBX32MV CONTROL BOX

LARGE ELECTRIC HEAT

ADDITIONAL KNOCK

OUT FOR

20 − 30 kW

BDC3 BLOWER

CONTROL (A15)

TERMINAL

STRIP

(TB2)

BLOWER

RELAY (K20)

TRANSFORMER

(T1)

TERMINAL

STRIP (TB1)

0Y1Y2DS

FIGURE 2

Page 9

I−APPLICATION

CBX32MV blower coils are designed for R410A applications only. All major blower coil components

must be matched according to Lennox recomme n d ations fo r the unit 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.

II−UNIT COMPONENTS A−Control Box

The CBX32MV 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.

B−Terminal Strips (TB1 and TB2)

All CBX32MV units are equipped with two low voltage terminal strips (TB1 and TB2) located in the control box. See figure 2. The strips are used for making up all indoor thermostat wires.

All CBX32MV units have factory installed jumpers connecting DS to Y1, R to O and Y1 to Y2. These jumpers will have to be removed in certain unit application. See table

TABLE 1

Application

Harmony II, CCB1, SignatureStatt

Remove Jumpers

DS to Y1

Heat Pump R to O

Two−Stage Cooling Y1 to Y2

C−Transformer (T1)

All CBX32MV 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.

D−Blower Relay (K20)

All units use SPDT relay to energize the blower motor in response to heating demand. The relay coil is energized when the 1st stage electric heat relay closes. When K20 is energized, its N.O. contacts close to energize jack plug JP46 pin 2 (located on blower drive control A15). When JP46−2 is energized, the blower drive control immediately energizes the blower on heating speed. Heating speed will override cooling speed. K20−2 will energize the economizer if used ( refer to wiring diagram.)

208 / 240 VOLT TRANSFORMER

PRIMARY

ORANGE

240 VOLTS

RED

208 VOLTS

BLACK

FIGURE 3

E−Circuit Breaker (CB8)−1 units & Fuse (F1)

All transformers used in the CBX32MV−1 series units are equipped with internal secondary voltage overcurrent protection. Each transformer uses a manual re−set circuit breaker (CB8) located on the transformer. The circuit breaker is connected in series with the blue secondary voltage wire and is rated at 3.5 Amps. CBX23MV−2 units and later are equipped with a fuse (F1) rated at 3 amps. F1 is connected in series with the blue secondary voltage wire and like CB8 provides overcurrent protection.

SECONDARY

BLUE

YELLOW

CB8

F−Plastic Drain Pans

Both upflow/downflow and horizontal drain pans are provided and installed on the CBX32MV 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 (see page 24 for horizontal left-hand application). Each pan has a set of connections, one for a primary drain and one for an auxiliary drain.

G−Coil

All CBX32MV 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 screen feeds multiple parallel circuits through the coils. The coil is designed to easily slide out of the unit cabinet.

Optional electric heating elements are sequenced so blower relay K20 operates on a first on/last off basis.

H−Variable Speed Blower Motor (B3)

CBX32MV series units use a single-phase variable-speed motor. See figure 4. A solid-state controller is attached to the motor.

Page 10

CBX32MV MOTOR BLOWER HOUSING

ARROW MUST

BE UP

MOTOR

BLOWER HOUSING

CBX32MV BLOWER MOTOR

SHAFT

MOTOR

CONTROLLER

J48

J49

CBX32MV BLOWER MOTOR COMPONENTS

STATOR

(WINDINGS)

BEARING

OUTPUT

SHAFT

ROTOR

FIGURE 4

I−BDC3 Blower Control Board (A15)

CFM on the CBX32MV unit is controlled by the BDC3 board (A15) located in the control box. CFM can be obtained by positioning jumpers (COOL, HEAT and ADJUST) on the BDC3 board. The jumpers are labeled 1,2,3, and 4. Each enables a different air volume. Diagnostic LEDs are provided as an aid in identifying the unit’s mode of operation. The LEDs are labeled RUN and CFM. See figure 5.

BLOWER SPEED ADJUSTMENTS

Diagnostic LEDs

RUN"

RUN indicates there is a demand for the blower motor to

run.

CFM"

CFM LED indicates the CFM the unit is operating according to

the jumper settings. The light flashes once for approximately every 100 CFM. For example, if the unit is operating at 1000 CFM, CFM LED will flash 10 times. If the CFM is 1150, CFM LED will flash 11 full times plus one fast or half flash.

At times the light may appear to flicker or glow. This takes place when the control is communicating with the motor between cycles. This is normal operation.

The appropriate speed according to application and CFM need is selected by moving jumper pins.

Jumper Settings

IMPORTANT

Before changing jumper setting, make sure the motor has completely stopped. Any jumper setting change will not take place while the motor is running.

Table 2 shows the recommended factory blower speed tap selections for CBX32MV series units. These settings are for nominal tonnage match−ups with the CBX32MV. When matched with other sizes, it is recommended that the CFM be adjusted to approximately 400 CFM per ton.

FACTORY BLOWER SPEED TAP SELECTION

UNIT

−018/ 024

−024/

−030

−036

−048

−060

−068

*Minimum setting for heat.

COOL" HEAT"

Condensing

Unit

COOL

PIN #3

COOL

PIN #3

COOL

PIN #3

COOL

PIN #2

COOL

PIN #3

COOL

PIN #3

To change jumper positions, gently pull the jumper off the pins and place it on the desired set of pins. The following section outlines the different jumper selections available and conditions associated with each one. Refer to figure 5 for identification.

After the CFM for each application has been determined, the jumper settings must be adjusted to reflect those given in the blower data tables at the front of this manual. From the tables determine which row of CFM volumes most closely matches the desired CFM. Once a specific row has been chosen (+, NORMAL, or −), CFM volumes from other rows cannot be used. Below are the descriptions of each of the jumper selections.

TABLE 2

SPEED TAP SELECTION

*Condensing Unit

Heat

with Electric Heat

Only

HEAT

PIN #4

HEAT

PIN #4

HEAT

PIN #4

HEAT

PIN #1

HEAT

PIN #1

HEAT

PIN #4

Pump

COOL

*Heat Pump with Electric

Heat

HEAT

PIN #4

HEAT

PIN #4

HEAT

PIN #4

HEAT

PIN #1

HEAT

PIN #1

HEAT

PIN #4

Page 11

BDC3 VARIABLE SPEED CONTROL SELECTIONS

JP1 15 PIN PLUG

(BOARD TO MOTOR)

4 3 2 1

DIAGNOSTIC

4 3 2 1

CFM RUN

DS LEDS

ACCESSORY RELAY

CONTACTS

(DRIVES OPTIONAL

ACCESSORY

RELAY)

OPERATIONAL

SELECTOR PINS

(Affects both heating

and cooling modes)

JP1

ACC

24V/1A

NORM

−

TEST

ADJUST HEAT COOL DELAY

NOTE − For two speed heat pump units blower will operate at 60%, 65% or 70% of COOL CFM. For single speed heat pump units blower will operate at 100% COOL CFM until supplemental electric heat is demanded. At that time, the blower will operate at HEAT speed selected. This arrangement provides for warmer supply air during heat pump operation only.

HEAT"

The HEAT jumper is used to determine CFM during a W1 demand for electric heat operation. These jumper selections are activated when W1 is energized with or without a Y1 demand for heat pump compressor.

DELAY"

HEATING SPEED

SELECTOR PINS

COOLING SPEED

SELECTOR PINS

FAN DELAY

SELECTOR PINS

FIGURE 5

ADJUST"

The ADJUST pins allow the motor to run at normal speed, approximately 10% higher, or approximately 10% lower than normal speed. The blower tables give three rows (+, NORMAL, and −) with their respective CFM volumes. Notice that the normal adjustment setting for heat speed position #3 is 1315 CFM. The + adjustment setting for that position is 1445 CFM and for the − adjustment setting is 1185 CFM. After the adjustment setting has been determined, chose the remainder speed jumper settings from those offered in the table in that row.

The TEST pin is available to bypass the BDC3 control and run the motor at approximately 70% to test that the motor is operational. This is beneficial primarily in troubleshooting. G must be energized for motor to run.

COOL"

The COOL jumper is used to determine the CFM during either 1) cooling or 2) heat pump operation without a call for electric heat. These jumper selections are activated for cooling when Y2 and DS terminals in the CBX32MV are energized and for heating when Y2 is energized.

Applications without the Lennox SignatureStatt or

EfficiencyPlus

CCB1 humidity control will provide 70% of

the COOL CFM during first−stage cooling for two−speed outdoor units. Units built prior to August 2002, will provide either 60% (−048, −060 series units) or 65% (−036 series units) of the COOL CFM during first stage cooling for two stage outdoor units. 100% of COOL speed is provided for systems with a single−speed outdoor units.

The DELAY jumper is used to set the specific motor fan mode of operation during cooling. Depending on the application, one of four fan options may be chosen by moving the jumper pins to the appropriate set of pins. Options 1, 2, 3, or 4 will have an increased dehumidification effect on the system. Option 1 will have the least effect and option 4 will have the greatest effect.

Applications with the EfficiencyPlus CCB1 humidity control create different CFM volumes. For example, during a first−stage cooling call (two−speed outdoor unit) with no demand from the CCB1, the air volume is 40% of the COOL jumper selection. For a normal COOL (Pin #2 setting for CBX32MV−036), the CFM is 1125; the reduced speed is 450 CFM (1125 x 40% = 450). This arrangement provides for additional dehumidification during standard first stage cooling. See tables 10 and 11 for various scenarios concerning use of the CCB1 humidity control and the CBX32MV series unit.

Applications with the Lennox SignatureStat but no demand for de−humidification will operate as follows: during a first−stage cooling call (two−stage outdoor unit), the air volume is 70% of the COOL jumper selection. For a normal COOL (Pin #2 setting for CBX32MV−036), the CFM is 1125; the reduced speed is 788 CFM (1125 x 70% =

788). This arrangement provides for additional dehumidification during standard first stage cooling. See tables 12 and 13 for various scenarios concerning use of the SignatureStat and the CBX32MV series unit.

For applications with Harmonyr zone control, the blower CFM volume is determined by the Harmony control center. This speed is not adjustable. See footnotes in the blower tables (table of contents).

Page 12

CBX32MV units built prior to February 2003

#1 PIN JUMPERED

A−Motor runs at 100% until demand is satisfied. B− Once demand is met, motor ramps down to off.

A B

OFF

100% CFM

COOLING DEMAND

* CB32XMV units date coded prior to 2−2006 will delay 60 seconds

100% CFM (*45 seconds)

OFF

100% CFM

COOLING DEMAND

OFFOFF

#2 PIN JUMPERED

A−Motor runs at 82% for approximately 7−1/2 minutes. If

demand has not been satisfied after 7−1/2 minutes,

B−motor runs at 100% until demand is satisfied. C− Once demand is met, motor ramps down to off.

OFF

7 1/2 MIN

82%CFM

100% CFM

COOLING DEMAND

#3 PIN JUMPERED

A−Motor runs at 50% for 1/2 minute. B−Motor then runs at

82% for approximately 7−1/2 minutes. If demand has not been satisfied after 7−1/2 minutes. C−Motor runs at 100% until demand is satisfied. D− Once demand is met, motor ramps down to off.

C D

100% CFM

OFF

1/2 MIN 50% CFM

7 1/2 MIN 82% CFM

COOLING DEMAND

#4 PIN JUMPERED

A−Motor runs at 50% for 1/2 minute. B−Motor then runs at

82% for approximately 7−1/2 minutes. If demand has not been satisfied after 7−1/2 minutes. C−Motor runs at 100% until demand is satisfied. D− Once demand is met, motor runs at 50% for 1/2 minute then E− Motor ramps down to off.

C D

100% CFM

1/2 MIN 50% CFM

OFF

1/2 MIN 50% CFM

7 1/2 MIN 82% CFM

COOLING DEMAND

CBX32MV units built February 2003 and later

#1 Pins Jumpered

A− Motor runs at 100% until demand is satisfied.

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

A B

100% CFM

COOLING DEMAND

#2 Pins Jumpered

A− Motor 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.

OFFOFF

#3 Pins Jumpered

A− Motor runs at 82% for approximately 7−1/2 minutes. If

demand has not been satisfied after 7−1/2 minutes −

B− Motor runs at 100% until demand is satisfied.

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

OFF

7 1/2 MIN

82%CFM

100% CFM

COOLING DEMAND

#4 Pins Jumpered

A− Motor runs at 50% for 30 seconds.

B− Motor then runs at 82% for approximately 7−1/2

minutes. If demand has not been satisfied after 7−1/2 minutes,

C− 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.

C D

100% CFM

1/2 MIN 50% CFM

OFF

1/2 MIN 50% CFM

7 1/2 MIN 82% CFM

COOLING DEMAND

III−VARIABLE SPEED MOTOR TROUBLESHOOTING

• Check motor, controls, wiring and connections thoroughly before replacing.

• Use proper replacement parts for motor and control model numbers.

• Keep duct static to a minimum.

• Size equipment properly.

• Check orientation before inserting motor connector.

DON’T

• Automatically assume the motor is bad.

• Locate connectors above 7 and 4 o’clock positions.

• Replace a control or motor number with an

unauthorized replacement.

• Use high pressure drop filters.

• Use restricted returns.

• Oversize systems then compensate with low airflow.

MOISTURE CHECK

• Connectors should point downward.

• Arrange harness with drip loop under motor.

• Check condensate drain plug.

• Check for airflow (too much latent capacity).

• Check for undercharged condition.

• Check for plug leaks in return ducts, cabinet.

Page 13

MOTOR CHECK

Kit #70J11 can be used to check the motor. The kit is available at the Lennox parts center. If not using the kit, follow the procedure below. These settings and jumper placements will bypass the BDC3 control board and confirm correct motor operation.

Symptom Cause/Procedure

Motor rocks slightly

when starting

Motor will not start,

no movement

Motor rocks, but

won’t start

Motor starts, but

varies up and down

or intermittent

Motor "Hunts" or

"Puffs" at high CFM

Stays at low CFM

despite system call

for cool or heat CFM

Stays at high CFM

Blower will not shut

off

Air noise

Noisy Blower or

cabinet

Motor failure has

occurred and

moisture is present

• Disconnect power to the unit.

• Change delay pin setting on the BDC3 board to #1

• Remove wires from terminal strips in control box.

• Install jumpers between "R" and "Y1" and "R

and "G"

• Turn on power to unit. Blower should operate on 60%, 65% or 70% of cool speed.

• When check is complete disconnect power and replace delay setting to original position.

This is normal start−up for the variable speed motor

• Check power at motor

• Check low voltage (24vac R to C) at motor

• Check low voltage connection (G, Y, R, C) at

motor.

• Check for unseated pins on motor harness.

• Test with temporary jumper between R−G.

• Check motor for tight shaft.

• Run moisture check.

• Check for loose or compliant motor mount.

• Make sure blower wheel is tight on shaft.

• Check line voltage for variation or "sag."

• Check low voltage connections (G, Y, R, C)

at motor

• Check for unseated pins in motor harness.

• Check "DS" on terminal strip for CFM

command

• Check system controls thermostat.

• Perform moisture check.

If removing panel or filter reduces "Puffing" reduce restriction or reduce max airflow.

• Check low voltage thermostat wires and connections.

• Verify fan is not in delay mode.

• Check "R" missing/not connected to motor.

• Perform motor check.

• Check "R" connection at motor.

• Check fan delay, wait until complete.

• Perform motor check.

• Current leakage from controls into G, Y or

• Check for Triac switched thermostat or solid state relay.

• Check for proper airflow setting.

• Check/replace filter.

• Use low pressure drop filter.

• Check/correct duct restrictions.

• Check for loose blower housing, panels, etc

• If high static causing noise, check for air

whistling through seams in ducts, cabinets or panels.

• Check cabinet/duct for deformation.

Replace motor and perform moisture check.

*60/65/70% OF COOL SPEED

*Reduced blower speed for production August 2002 and later is 70% of COOL speed for ALL model units. Reduced blower speed for production prior to August 2002 is 65% of COOL for the −036 units and 60% of COOL for −048 and −060 series units.

COOL SPEED

• Disconnect power to unit.

• Change delay pin setting on the BDC3 board to #1

• Remove wires from terminal strips in control box.

• Install jumpers between "R" and "Y1", "R" and

"Y2","R" and "DS"and "R" and "G".

• Turn on power to unit. Blower should operate on cool speed.

• When check is complete disconnect power and replace delay setting to original position.

HEAT SPEED

• Disconnect power to the unit.

• Change delay pin setting on the BDC3 board to #1

• Remove wires from terminal strips in control box.

• Install jumper between "R" and "W1".

• Turn on power to unit. Blower should operate on

heat speed.

• When check is complete disconnect power and replace delay setting to original position.

Notes on 5 Pin AC Line Connection

• The motor connects directly to the line.

• Pins 1 & 2 are jumpered in the harness for 115V

operation.

• Make sure power is off before inserting power connector.

• Plug is polarized.

Notes on 16 Pin Control Connection

• Control functions (G, Y1, Y2) may be active at greater than .5 x control transformer voltage.

• Do not apply 24vac to either "Out" pin (8 or16).

• High voltage on control pins will destroy motor.

• Make sure pins are fully seated in connector and

housing.

• Verify common connection from transformer (C or B) to C1, C2 (Pin 1 and Pin 3).

• Once common is verified, test motor by applying

24vac (R) to control pins.

(See Figure 6)

Motor Connectors

(Cable Half)

5 Pin Power connector

16 Pin Control Connector

Out −

Adjust 

Cool

Delay

Common 2

W/W1

Common 1

AC Line

Gnd

Line 1 and 2 will be connected for 120 Vac applications only

Out+

G (fan)

Y/Y2 EM ht/W2

24Vac (R)

Heat

DS/Pwn (Speed) O (Rev Valve)

FIGURE 6

Page 14

IV−OPTIONAL ECB29/31 ELECTRIC HEAT

A−Matchups and Ratings

Tables 4, 5 and 6 show all approved CBX32MV to ECB29 matchups and electrical ratings.

B−Electric Heat Components

ECB29 parts arrangement is shown in figures 7 through 10. All electric heat sections consist of components mounted to the electric heat vestibule panel and electric heating elements exposed directly to the air stream. 208/230V electric heat sections may be equipped with circuit breakers. The circuit breakers are designated by CB in the model number.

1−Primary(S15) & Secondary(S20) Temperature Limits

Both the primary (S15) and secondary (S20) limits are located on the electric heat vestibule panel and are exposed directly to the air stream through an opening in the panel. The high temperature limits are SPST N.C. limits with the primary limit being an auto-reset limit and the secondary limit being a one-time" limit. One-time limits must be replaced when opened. The limits are factory set and are not adjustable.

208/230 Volt Electric Heat Sections

Each stage of the 208/230 electric heat is protected by a primary (S15) and secondary (S20) high temperature limit. Both S15 and S20 are located in the same housing. Each stage uses the same style of limits. Both the primary and secondary limits are wired in series with a heat element. When either S15 or S20 opens, the corresponding heat element is de-energized. All other heating elements remain energized. The primary high temperature limit opens at 150_F +

2.8_C) on a temperature rise and automatically resets at 110_F + fall. The secondary high temperature limit opens at 333_F + rise. If the secondary limit opens it must be replaced.

2−Electric Heat Sequencer Relays

(K32, K33, K34, K35, and K116) (208/230 volt only)

Relays K32, K33, K34, K35 and K116 are N.O. sequencer relays with a resistive element for a coil and a bi-metal disk which actuates the contacts. The relays are located on the electric heat vestibule panel and are energized by a 24V heating demand (W1, W2, and W3) via jack/plug 2 (J2), which is used to connect electric heat to the blower coil control circuit. When energized, the internal resistance heats the bi-metal disk causing the

9_F (43.3_C + 5.0_C) on a temperature

10_F (167.2_C + 5.6_C) on a temperature

5_F (65.5_C +

contacts to close. When the relay is de-energized, t h e disk cools and the contacts open. The relays energize different stages of heat, as well as the blower. The blower is always first on and last off.

3−Circuit Breaker (CB1, CB2, and CB3)

(208/230 volt only)

Line voltage connections are made to circuit breakers CB1, CB2, and CB3 in the electric heat sections with circuit breakers (designated by CB in the model numbers). Table 3 shows the amperage rating for each circuit breaker used. Single-phase electric heat uses two pole circuit breakers; while three-phase electric heat uses three pole circuit breakers.

TABLE 3

ECB29 CIRCUIT BREAKERS

UNIT

ECB29-5CB-1 (P) 30 AMP −−− −−− ECB29-8CB-1 (P) 50 AMP −−− −−− ECB29-12.5CB-1 (P) 25 AMP 50 AMP −−− ECB29-15CB-1 (P) 30 AMP 60 AMP −−− ECB29-25CB-1 (P) 50 AMP 50 AMP 50 AMP ECB29-30CB-1 (P) 60 AMP 60 AMP 60 AMP ECB29-15CB-1 (Y) 60 AMP −−− −−− ECB29-20CB-1 (Y) 40 AMP 35 AMP −−− ECB29-25CB-1 (Y) 50 AMP 35 AMP −−−

Note: Do not remove patch plate or insulation on units without circuit breakers!!

4−Terminal Strip (TB2) 208/230 volt only)

For the electric heat sections without circuit breakers or fuses, line voltage connections are made to terminal strip TB2. The terminal strip is located in the lower left corner of the electric heat vestibule panel. Single-phase electric heat uses two pole terminal strips; while three-phase electric heat uses three pole terminal strips.

5−Heating Elements (HE1 through HE6)

Heating elements are composed of helix wound bare nichrome wire exposed directly to the air stream. The elements are supported by insulators mounted to th e wire frame. For single phase applications, one element is used per stage. Each stage is energized independently by the corresponding relay located on the electric heat vestibule arranged in a three phase delta. Once energized, heat transfer is instantaneous. High temperature protection is provided by primary and secondary high temperature limits.

CB1

AMPS

CB2

AMPS

CB3

AMPS

Page 15

TABLE 4 − ELECTRIC HEAT DATA

SINGLE PHASE ELECTRIC HEAT

Model Number

2.5 kW

4 lbs.

ECB29-2.5 (28K30)

Terminal Block

No. of

Vol ts

Steps

InputkWInput

208 1.9 6,400 4.3 17 15 − − − − − − − − − − − − − − −

Btuh

Input

220 2.1 7,200 4.3 17 20 − − − − − − − − − − − − − − −

CBX32MV−018/024 CBX32MV−024/030

Blower

Motor

Full

Load

Amps

Minimum

Circuit

Ampacity

Maximum

Overcurrent

Protection

Blower

Motor

Full

Load

Amps

Minimum

Circuit

Ampacity

Circuit Circuit

1 21 2

230 2.3 7,800 4.3 18 20 − − − − − − − − − − − − − − −

240 2.5 8,500 4.3 18 20 − − − − − − − − − − − − − − −

5 kW

4 lbs.

ECB29-5 (28K31)

Terminal Block

ECB29-5CB (28K32)

30A Circuit breaker

208 3.8 12,800 4.3 28 30 4.3 28 − − − 30 − − −

220 4.2 14,300 4.3 31 35 4.3 31 − − − 35 − − −

230 4.6 15,700 4.3 31 35 4.3 31 − − − 35 − − −

240 5.0 17,100 4.3 31 35 4.3 31 − − − 35 − − −

6 kW

4 lbs.

ECB29-6 (47L22)

Terminal Block

ECB29-6CB (47L23)

35A Circuit breaker

208 4.5 15,400 4.3 32 35 4.3 32 − − − 35 − − −

220 5.0 17,100 4.3 37 40 4.3 37 − − − 40 − − −

230 5.5 18,800 4.3 37 40 4.3 37 − − − 40 − − −

240 6.0 20,500 4.3 37 40 4.3 37 − − − 40 − − −

8 kW

5 lbs.

ECB29-8 (28K33)

Terminal Block

ECB29-8CB (28K34)

45A Circuit breaker

208 6.0 20,500 4.3 41 45 4.3 41 − − − 45 − − −

220 6.7 22,900 4.3 47 50 4.3 47 − − − 50 − − −

230 7.3 25,100 4.3 47 50 4.3 47 − − − 50 − − −

240 8.0 27,300 4.3 47 50 4.3 47 − − − 50 − − −

9 kW

5 lbs.

ECB29−9CB (10L11)

50A Circuit breaker

ECB29EH-9CB (91K67)

50A Circuit breaker

208 6.8 23,100 4.3 46 50 4.3 46 − − − 50 − − −

220 7.6 25,800 4.3 52 60 4.3 52 − − − 60 − − −

230 8.3 28,200 4.3 52 60 4.3 52 − − − 60 − − −

240 9.0 30,700 4.3 52 60 4.3 52 − − − 60 − − −

10 kW

6 lbs.

ECB29−10 (28K35)

Terminal Block

ECB29-10CB (28K36)

60A Circuit breaker

208 7.5 25,600 4.3 51 60 − − − − − − − − − − − − − − −

220 8.4 28,700 4.3 53 60 − − − − − − − − − − − − − − −

230 9.2 31,400 4.3 55 60 − − − − − − − − − − − − − − −

240 10.0 34,100 4.3 58 60 − − − − − − − − − − − − − − −

12.5 kW

10 lbs.

ECB29-12.5CB (28K37)

(1) 25A & (1) 50A Circuitbreaker

ECB29EH-12.5CB (91K68)

(1) 25A & (1) 50A Circuitbreaker

208 9.4 32,000 − − − − − − − − − 4.3 24 31 25

220 10.5 35,800 − − − − − − − − − 4.3 27 35 30 50

230 11. 5 39,200 − − − − − − − − − 4.3 27 35 30 50

240 12.5 42,600 − − − − − − − − − 4.3 27 35 30 50

15 kW

12 lbs.

(1) 30A & (1) 60A Circuit breaker

ECB29-15CB (28K38)

ECB29EH-15CB (91K69)

208 11. 3 38,400 − − − − − − − − − 4.3 28 37 30

220 12.6 43,000 − − − − − − − − − 4.3 31 42 35 60

230 13.8 47,000 − − − − − − − − − 4.3 31 42 35 60

240 15.0 51,200 − − − − − − − − − 4.3 31 42 35 60

NOTE − Circuit 1 Minimum Circuit Ampacity includes the Blower Motor Full Load Amps.

Electric heater capacity only  does not include additional blower motor heat capacity.

Amps shown are for blower motor only.

Refer to National or Canadian Electrical Code manual to determine wire, fuse and disconnect size requirements. Use wires suitable for at least 167°F (75_C).

Bold text indicates that the circuit breaker on CB" circuit breaker models must be replaced with size noted.

HACR type circuit breaker or fuse.

Maximum

Overcurrent

Protection

Page 16

TABLE 5 − ELECTRIC HEAT DATA

SINGLE PHASE ELECTRIC HEAT

Model Number

5 kW

4 lbs.

6 kW

4 lbs.

8 kW

5 lbs.

9 kW

5 lbs.

12.5 kW

10 lbs.

15 kW

12 lbs.

20 kW

19 lbs.

(1) 25A & (1) 50A Circuitbreaker

ECB29EH-12.5CB (91K68)

(1) 25A & (1) 50A Circuitbreaker

(1) 30A & (1) 60A Circuit breaker

(1) 50A & (1) 60A Circuit breaker

ECB29-5 (28K31)

Terminal Block

ECB29-5CB (28K32)

30A Circuit breaker

ECB29-6 (47L22)

Terminal Block

ECB29-6CB (47L23)

35A Circuit breaker

ECB29-8 (28K33)

Terminal Block

ECB29-8CB (28K34)

45A Circuit breaker

ECB299CB (10L11)

50A Circuit breaker

ECB29EH-9CB (91K67)

50A Circuit breaker

ECB29-12.5CB (28K37)

ECB29-15CB (28K38)

ECB29EH-15CB (91K69)

ECB29-20CB (11L31)

ECB29EH-20CB (91K70)

CBX32MV−036

Minimum

No.

Vol ts

InputkWInput

Steps

208 3.8 12,800 4.3 28 − − − 30 − − −

Input

Btuh

Blower

Motor Full

Load Amps

220 4.2 14,300 4.3 31 − − − 35 − − −

230 4.6 15,700 4.3 31 − − − 35 − − −

240 5.0 17,100 4.3 31 − − − 35 − − −

208 4.5 15,400 4.3 32 − − − 35 − − −

220 5.0 17,100 4.3 37 − − − 40 − − −

230 5.5 18,800 4.3 37 − − − 40 − − −

240 6.0 20,500 4.3 37 − − − 40 − − −

208 6.0 20,500 4.3 41 − − − 45 − − −

220 6.7 22,900 4.3 47 − − − 50 − − −

230 7.3 25,100 4.3 47 − − − 50 − − −

240 8.0 27,300 4.3 47 − − − 50 − − −

208 6.8 23,100 4.3 46 − − − 50 − − −

220 7.6 25,800 4.3 52 − − − 60 − − −

230 8.3 28,200 4.3 52 − − − 60 − − −

240 9.0 30,700 4.3 52 − − − 60 − − −

208 9.4 32,000 4.3 24 31 25

220 10.5 35,800 4.3 27 35 30 50

230 11 .5 39,200 4.3 27 35 30 50

240 12.5 42,600 4.3 27 35 30 50

208 11 .3 38,400 4.3 28 37 30

220 12.6 43,000 4.3 31 42 35 60

230 13.8 47,000 4.3 31 42 35 60

240 15.0 51,200 4.3 31 42 35 60

208 15.0 51,200 4.3 47 41 50 60

220 16.8 57,300 4.3 52 46 60 60

230 18.4 62,700 4.3 52 46 60 60

240 20.0 68,200 4.3 52 46 60 60

Circuit

Ampacity

Overcurrent Protection

Circuit Circuit

1 212

Maximum

THREE PHASE ELECTRIC HEAT

8 kW

5 lbs.

10 kW

6 lbs.

15 kW

12 lbs.

20 kW

19 lbs.

NOTE − Circuit 1 Minimum Circuit Ampacity includes the Blower Motor Full Load Amps.

Electric heater capacity only  does not include additional blower motor heat capacity.

Amps shown are for blower motor only.

Refer to National or Canadian Electrical Code manual to determine wire, fuse and disconnect size requirements. Use wires suitable for at least 167°F (75_C).

Bold text indicates that the circuit breaker on CB" circuit breaker models must be replaced with size noted.

HACR type circuit breaker or fuse.

ECB29-8 (28K42)

Terminal Block

ECB29-10 (28K43)

Terminal Block

ECB29-15CB (28K44)

50A Circuit breaker

ECB29-20CB (28K45)

(2) 35A Circuit breaker

208 6.0 20,500 4.3 26 − − − 30 − − −

220 6.7 22,900 4.3 29 − − − 30 − − −

230 7.3 25,100 4.3 29 − − − 30 − − −

240 8.0 27,300 4.3 29 − − − 30 − − −

208 7.5 25,600 4.3 31 − − − 35 − − −

220 8.4 28,700 4.3 35 − − − 35 − − −

230 9.2 31,400 4.3 35 − − − 35 − − −

240 10.0 34,100 4.3 35 − − − 35 − − −

208 11 .3 38,400 4.3 44 − − −

45 − − −

220 12.6 43,000 4.3 50 − − − 50 − − −

230 13.5 47,000 4.3 50 − − − 50 − − −

240 15.0 51,200 4.3 50 − − − 50 − − −

208 15.0 51,200 4.3 31 21 35

220 16.8 57,300 4.3 35 24 35 35

230 18.4 62,700 4.3 35 24 35 35

240 20.0 68,200 4.3 35 24 35 35

Page 17

TABLE 6 − ELECTRIC HEAT DATA

SINGLE PHASE ELECTRIC HEAT CBX32MV−048, CBX32MV−060 and CBX32MV−068

Blower

Motor

Full Load

Amps

5 kW

4 lbs.

Model Number

ECB29-5 (28K31)

ECB29-5CB (28K32)

30A Circuit breaker

Terminal Block

No.

Steps

Volts

InputkWInput

Btuh

Input

208 3.8 12,800 9.1 34 − − − − − − 40 − − − − − − 220 4.2 14,300 9.1 37 − − − − − − 45 − − − − − − 230 4.6 15,700 9.1 37 − − − − − − 45 − − − − − − 240 5.0 17,100 9.1 37 − − − − − − 45 − − − − − −

6 kW

4 lbs.

ECB29-6 (47L22)

Terminal Block

ECB29-6CB (47L23)

35A Circuit breaker

208 4.5 15,400 9.1 36 − − − − − − 45 − − − − − −

220 5.0 17,100 9.1 43 − − − − − − 50 − − − − − − 230 5.5 18,800 9.1 43 − − − − − − 50 − − − − − − 240 6.0 20,500 9.1 43 − − − − − − 50 − − − − − −

8 kW

5 lbs.

ECB29-8 (28K33)

Terminal Block

ECB29-8CB (28K34)

45A Circuit breaker

208 6.0 20,500 9.1 47 − − − − − − 50 − − − − − −

220 6.7 22,900 9.1 53 − − − − − − 60 − − − − − − 230 7.3 25,100 9.1 53 − − − − − − 60 − − − − − − 240 8.0 27,300 9.1 53 − − − − − − 60 − − − − − −

9 kW

5 lbs.

ECB29-9CB (10L11)

50A Circuit breaker

ECB29EH-9CB (91K67)

50A Circuit breaker

208 6.8 23,100 9.1 52 − − − − − − 60 − − − − − −

220 7.6 25,800 9.1 58 − − − − − − 60 − − − − − − 230 8.3 28,200 9.1 58 − − − − − − 60 − − − − − − 240 9.0 30,700 9.1 58 − − − − − − 60 − − − − − −

12.5 kW

10 lbs.

ECB29-12.5CB (28K37)

(1) 25A & (1) 50A Circuit breaker

ECB29EH-12.5CB (91K68)

(1) 25A & (1) 50A Circuit breaker

208 9.4 32,000 9.1 30 31 − − −

220 10.5 35,800 9.1 33 35 − − − 230 11.5 39,200 9.1 33 35 − − − 240 12.5 42,600 9.1 33 35 − − −

15 kW

12 lbs.

(1) 30A & (1) 60A Circuit breaker

ECB29-15CB (28K38)

ECB29EH-15CB (91K69)

208 11.3 38,400 9.1 34 37 − − −

220 12.6 43,000 9.1 37 42 − − − 230 13.5 47,000 9.1 37 42 − − − 240 15.0 51,200 9.1 37 42 − − −

20 kW

19 lbs.

(1) 50A & (1) 60A Circuit breaker

ECB29-20CB (11L31)

ECB29EH-20CB (91K70)

208 15.0 51,200 9.1 53 41 − − − 60 60 − − −

220 16.8 57,300 9.1 58 46 − − − 60 60 − − − 230 18.4 62,700 9.1 58 46 − − − 60 60 − − − 240 20.0 68,200 9.1 58 46 − − − 60 60 − − −

25 kW

19 lbs.

ECB29-25CB (28K40)

(3) 50A Breakers

208 18.8 64,100 9.1 49 31 31 50

220 21.0 71,700 9.1 54 35 35 60 50 50 230 23.0 78,300 9.1 54 35 35 60 50 50 240 25.0 85,300 9.1 54 35 35 60 50 50

THREE PHASE ELECTRIC HEAT 8 kW

5 lbs.

10 kW

6 lbs.

15 kW

12 lbs.

20 kW

19 lbs.

25 kW

19 lbs.

NOTE − Circuit 1 Minimum Circuit Ampacity includes the Blower Motor Full Load Amps.

Electric heater capacity only  does not include additional blower motor heat capacity.

Amps shown are for blower motor only.

Refer to National or Canadian Electrical Code manual to determine wire, fuse and disconnect size requirements. Use wires suitable for at least 167°F (75_C).

Bold text indicates that the circuit breaker on CB" circuit breaker models must be replaced with size noted.

HACR type circuit breaker or fuse.

ECB29-8 (28K42)

Terminal block

ECB29-10 (28K43)

Terminal block

ECB29-15CB (28K44)

50A Circuit breaker

ECB29-20CB (28K45)

(2) 35A Circuit breakers

ECB29-25CB (28K46)

(2) 45A Circuit breakers

208 6.0 20,500 9.1 32 − − − − − − 40 − − − − − −

220 6.7 22,900 9.1 35 − − − − − − 40 − − − − − − 230 7.3 25,100 9.1 35 − − − − − − 40 − − − − − − 240 8.0 27,300 9.1 35 − − − − − − 40 − − − − − − 208 7.5 25,600 9.1 37 − − − − − − 45 − − − − − −

220 8.4 28,700 9.1 41 − − − − − − 50 − − − − − − 230 9.2 31,400 9.1 41 − − − − − − 50 − − − − − − 240 10.0 34,100 9.1 41 − − − − − − 50 − − − − − − 208 11.3 38,400 9.1 50 − − − − − − 60 − − − − − −

220 12.6 43,000 9.1 56 − − − − − − 60 − − − − − − 230 13.5 47,000 9.1 56 − − − − − − 60 − − − − − − 240 15.0 51,200 9.1 56 − − − − − − 60 − − − − − − 208 15.0 51,200 9.1 37 21 − − −

220 16.8 57,300 9.1 41 24 − − − 230 18.4 62,700 9.1 41 24 − − − 240 20.0 68,200 9.1 41 24 − − − 208 18.8 64,100 9.1 44 27 − − − 50

220 21.0 71,700 9.1 49 30 − − − 230 23.0 78,300 9.1 49 30 − − − 240 25.0 85,300 9.1 49 30 − − −

Minimum

Circuit Ampacity

Maximum

Overcurrent Protection

Circuit1Circuit2Circuit3Circuit1Circuit2Circuit

45 50 − − −

45 60 − − −

50 35 − − −

60 45 − − −

45 − − −

45 50 − − −

50 − − −

45 60 − − −

30 − − −

40 − − −

60 45 − − −

Page 18

ECB29-5, -5CB 208/230 SINGLE−PHASE

ELECTRIC HEAT VESTIBULE PARTS ARRANGEMENT

ELECTRIC HEAT

VESTIBULE PANEL

TERMINAL BLOCK

(TB2)

ELECTRIC HEAT

CIRCUIT BREAKER

(CB1)

SEQUENCER RELAY (K32)

ELECTRIC HEAT

ELEMENT (HE1)

PRIMARY LIMIT (S15)

& SECONDARY LIMIT (S20)

ECB29−8 CIRCUIT

BREAKER (CB1)

FIGURE 7

ECB29-8 AND -8CB 208/230 SINGLE−PHASE

ELECTRIC HEAT VESTIBULE PARTS ARRANGEMENT

ELECTRIC HEAT

VESTIBULE PANEL

ELECTRIC HEAT

ELEMENT (HE1)

PRIMARY LIMIT (S15)

& SECONDARY LIMIT (S20)

TERMINAL BLOCK

(TB2)

ELECTRIC HEAT

SEQUENCER RELAY (K33)

ELECTRIC HEAT

SEQUENCER RELAY (K32)

ELECTRIC HEAT

ELEMENT (HE2)

FIGURE 8

Page 19

CIRCUIT BREAKER

(CB1)

ECB29-8,−10 208/230 THREE−PHASE

ECB29-12.5CB, -15CB 208/230 SINGLE & THREE−PHASE

ELECTRIC HEAT VESTIBULE PARTS ARRANGEMENT

ELECTRIC HEAT ELEMENT (HE3)

ELECTRIC HEAT

SEQUENCER RELAY (K32)

ELECTRIC HEAT

VESTIBULE PANEL

ELECTRIC HEAT

SEQUENCER RELAY (K33)

TERMINAL BLOCK

(TB2)

PRIMARY LIMIT (S15)

& SECONDARY LIMIT (S20)

ELECTRIC HEAT

ELEMENT (HE2)

ELECTRIC HEAT ELEMENT (HE1)

PRIMARY LIMIT (S15)

& SECONDARY LIMIT (S20)

ELECTRIC HEAT

VESTIBULE PANEL

PRIMARY LIMIT (S15)

& SECONDARY LIMIT (S20)

CIRCUIT BREAKER

(CB1)

CIRCUIT BREAKER

(CB2)

ECB29−20CB,−25CB 208/230 THREE−PHASE

ELECTRIC HEAT VESTIBULE PARTS ARRANGEMENT

ELECTRIC HEAT

SEQUENCER RELAY (K33)

(CB2)

FIGURE 9

ECB29-25CB, -208/230 SINGLE−PHASE

ELECTRIC HEAT

ELEMENT (HE6)

ELECTRIC HEAT

ELEMENT (HE1 & HE2)

(not shown)

ELECTRIC HEAT

ELEMENT (HE4)

ELECTRIC HEAT

ELEMENT (HE3)

ELECTRIC HEAT

ELEMENT (HE5)

PRIMARY LIMIT (S15)

& SECONDARY LIMIT (S20)

ELECTRIC HEAT

SEQUENCER RELAY (K32)

ELECTRIC HEAT

SEQUENCER RELAY (K116)

CIRCUIT BREAKER

(CB3)

ELECTRIC HEAT

SEQUENCER RELAY (K35)

ELECTRIC HEAT

SEQUENCER RELAY (K34)

FIGURE 10

Page 20

V− OPTIONAL HUMIDITY CONTROL (A20)

EfficiencyPlus PARTS IDENTIFICATION

HINGES

SLIDE

(ON CIRCUIT BOARD)

COVER

VERTICAL SLIDE CONTROL

(control setpoint)

NOTE−TO REMOVE COVER, HOLD BASE SECTION AND GENTLY PULL THE COVER OUT AT THE BOTTOM AND PIVOT IT UP AND AWAY FROM BASE.

BASE SECTION

CONTROL WIRE ENTRY

TERMINAL BLOCK

INDICATING LIGHTS

HUMIDITY SENSOR

FIGURE 11

A−CCB1

Optional Comfort Control Board (CCB1) A20 may be installed adjacent to the indoor thermostat (figure 11). The control monitors indoor humidity conditions and creates a dehumidification demand in response to indoor humidity just as the thermostat creates a cooling demand in response to indoor temperature. The CCB1 works in combination with the indoor thermostat to adjust compressor speed and indoor blower speed. Although the control provides a dehumidification demand, only the thermostat can directly control compressor operation. The CCB1 cannot call for a compressor cycle by itself.

Principles of Cooling with Drier Air

The humidity comfort range for humans is between 40% and 60% relative humidity (RH). A vertical slide on the control allows the humidity setpoint to be adjusted within that comfort range. 50% RH is the recommended initial setpoint until personal comfort level is established. The personal comfort level will vary with humidity as with temperature. For example, if air at 75°F and 50% RH is changed to 60% RH, the air will feel" much warmer. Likewise, if the air is reduced to 40% RH, it will feel" much cooler.

Even when inactive, the body evaporates a large amount of moisture away from the skin. This evaporation produces a cooling effect (during wintertime this phenomenon is called wind-chill"). Dry air is capable of absorbing more moisture away from the skin thereby increasing the cooling effect.

When the CCB1 senses that the indoor humidity level is above the control setpoint, the control places the CBX32MV and outdoor unit in a dehumidification mode .

To produce drier air, the CBX32MV will slow down the speed of the air crossing the indoor coil. Because the air is moving much slower than normal, the indoor coil is allowed more time to remove moisture from the air (a higher percentage of the air passing over the coil is cooled to its dew point removing more moisture). At the same time the two-speed outdoor unit will switch to high-speed to produce a colder indoor coil. The colder indoor coil and slower moving air combine to produce drier supply air.

NOTE−The indoor blower speed is reduced in order to slow the air speed across the indoor coil. The supply air exiting the unit may not feel as forceful. This is normal. Remember that when the unit is in dehumidification mode, the comfort level is increased because the unit is producing cooler, drier air.

The exact sequence of operation to produce cooler, drier air is described in the following section.

Operation

The CCB1 operates only during cooling mode. During normal cooling operation, when there is no indoor humidity demand, the unit operates as a straight two-speed cooling system. First stage thermostat demand energizes the compressor and indoor blower on low speed. Increased cooling demand energizes the compressor and indoor blower on high speed.

The control is equipped with a row of orange LED lights on its face which indicate the amount of relative humidity demand present. When one or more LEDs are lit, the control signals the CBX32MV to begin dehumidification mode. Tables 10 and 11 shows system response to thermostat and CCB1 demand.

Calibration Precautions

Extreme care should be taken to avoid exposing the CCB1 to fumes from household chemicals. The humidity sensing element in the CCB1 is a precise component which can be damaged or the calibration changed by household chemicals and cleaning agents. Make sure all household chemicals are stored in a different room in the building. Also, use only mild diluted soapy water when cleaning the CCB1 cover or the area surrounding the CCB1. The sensing element cannot be field calibrated. The CCB1 contains no field repairable parts and must be replaced when damaged in this manner.

Agents which can damage the CCB1 include alcohol, benzene, chlorine and chlorine based solutions, acetone (nail polish remover), bug sprays and other household cleaners.

Calibration can also be adversely affected by the placement of the CCB1 with respect to the indoor thermostat, exterior doors and windows and supply air registers. Most thermostats have anticipation resistors

Page 21

which give off heat. If the CCB1 is installed directly above the indoor thermostat, the humidity sensor calibration will be thrown off. If the CCB1 is installed directly above the indoor thermostat, it should be relocated to the side of the thermostat. Refer to CCB1 installation instructions.

Other Conditions Which Adversely Affect

CCB1 Performance

Blower speed selection can adversely affect CCB1 performance. Higher blower speeds should be selected to provide maximum sensible cooling, while lower blower speeds should be selected to provide maximum humidity removal. Refer to CBX32MV and CCB1 installation instructions.

It is recommended that the indoor blower be left in AUTO mode at all times. During dehumidification mode, the indoor coil and drain pan may become saturated with moisture. If the indoor blower is left in ON mode, much of that moisture can be re-evaporated into the living space between thermostat demands. This can create a constant demand for humidity removal and may cause extended compressor run times. Refer to table 7 for jumpers per application. CBX32MV units manufactured January 2002 and later, will have factory installed jumpers. Remove jumpers not used.

TABLE 7

JUMPERS REQUIRED

DS to Y1 and

Y1 to Y2

DS to Y1 and

Y1 to Y2 and

O to R

DS to Y1 and

O to R

Y1 to Y2 and

O to R

Without CCB1

Humidity

Control

With CCB1 Hu-

midity

Control

Heat Pump

Condensing

Unit

Heat Pump

Condensing

Unit

Single Speed

Two Speed DS to Y1

Single Speed

Two Speed

Single Speed Y1 to Y2

Two Speed None

Single Speed

Two Speed O to R

The CCB1 may become indefinitely latched in the dehumidification mode when power to the unit is turned off. This condition can be caused by turning off power while dehumidification demand is present, then turning on power when dehumidification demand is satisfied. If the CCB1 becomes stuck in this manner, it can be reset by removing thermostat demand then moving the CCB1 slide switch all the way down and back up to its setpoint.

How to unlatch CCB1

1− Force a cooling demand by setting thermostat to COOL

mode and by moving thermostat lever to lowest position.

2− Move CCB1 slide control down to 40% relative

humidity. CCB1 lights should come on.

3− Now, move CCB1 slide control back up to 60% relative

humidity. The lights should go off.

4− Remove thermostat demand by moving thermostat

lever to cycle unit off.

Applications with the EfficiencyPlus CCB1 humidity control create different CFM volumes. For example, during a first−stage cooling call (two−speed outdoor unit) with no demand from the CCB1, the air volume is 40% of the COOL jumper selection. For a normal COOL (Pin #2 setting for CBX32MV−036), the CFM is 1125; the reduced speed is 450 CFM (1125 x 40% = 450). This arrangement provides for additional dehumidification during first stage cooling. See tables 10 and 11 for various scenarios concerning use of the CCB1 humidity control and the CBX32MV series unit.

B−SignatureStatt or ComfortSense® 7000

The reference thermostats can be installed in place of the indoor thermostat. The thermostat monitors indoor humidity conditions and creates a dehumidification demand in response to indoor humidity just as it creates a cooling demand in response to indoor temperature. The SignatureStat adjusts compressor speed and indoor blower speed to maintain humidity at a comfortable level.

Principles of Cooling with Drier Air

The humidity comfort range for humans is between 40% and 60% relative humidity (RH). 50% RH is the recommended initial setpoint until personal comfort level is established. The personal comfort level will vary with humidity as with temperature. For example, if air at 75°F and 50% RH is changed to 60% RH, the air will feel" much warmer. Likewise, if the air is reduced to 40% RH, it will feel" much cooler.

When the thermostat senses that the indoor humidity level is above the control setpoint, the control places the CBX32MV and outdoor unit in a dehumidification mode.

To produce drier air, the CBX32MV will slow down the speed of the air crossing the indoor coil. Because the air is moving much slower than normal, the indoor coil is allowed more time to remove moisture from the air (a higher percentage of the air passing over the coil is cooled to its dew point removing more moisture). At the same time the two-stage outdoor unit will switch to high-speed to produce a colder indoor coil. The colder indoor coil and slower moving air combine to produce drier supply air.

Page 22

The exact sequence of operation to produce cooler, drier air is described in the following section.

Other Conditions Which Adversely Affect

Thermostat Performance

Blower speed selection can adversely affect thermostat performance. Higher blower speeds should be selected to provide maximum sensible cooling, while lower blower speeds should be selected to provide maximum humidity removal. Refer to CBX32MV and applicable thermostat installation instructions.

TABLE 8

JUMPERS REQUIRED

DS to Y1 and

Y1 to Y2

DS to Y1 and

Y1 to Y2 and

O to R

DS to Y1 and

O to R

Y1 to Y2 and

O to R

Humidity

Control

OFF

Humidity

Control

Heat Pump

Condensing

Unit

Heat Pump

Condensing

Unit

Single Speed

Two Speed DS to Y1

Single Speed

Two Speed

Single Speed Y1 to Y2

Two Speed None

Single Speed

Two Speed O to R

Operation

Dehumidification is provided only when the thermostat is in cool mode. Dehumidification D terminal wires to variable−speed blower (reverse logic/active on low signal 24VAC). When the unit is in heating mode, the dehumidification function is off. The default mode for dehumidification is OFF and needs to be activated during installation.

The D terminal is active whenever the thermostat is powered, EXCEPT when there is a dehumidification demand. This means that the D terminal has 24V on it even in HEAT and OFF modes.

Basic Mode: Dehumidification only with a cooling demand. COOL is on, then D is active (reverse logic, off), and G is on (if not already on), Y1 and Y2 (if available) is on.

Precision Mode: Dehumidification with or without Cooling demand. D is active (reverse logic, off), and G, Y1, and Y2 (if available) are on. Note that H is inactive (off) during dehumidification. The D terminal controls dehumidification. When a dehumidification demand is present, the D terminal becomes de−energized. Otherwise, 24VAC is present in off mode and heating mode unless there is a call for dehumidification. Tables 12 and 13 show system response to thermostat demand.

Dehumidify Mode Screen (SignatureStat Only)

NOTE − See the ComfortSense 7000 user guide for interface instructions for dehumidify mode operations.

NOTE − Basic or Precision mode must be turned on before you can adjust the dehumidify level on the thermostat .

1 − From the home screen press MENU. 2 − Use the UP or DOWN button to highlight DEHUMIDIFY.

See figure 12.

Setting Humidity Levels

MAIN MENU

PROGRAM HEAT / COOL HUMIDIFY

DEHUMIDIFY

HOME

SELECT

FIGURE 12

3 − Press SELECT to choose MODE.

Setting Humidity Levels

HUMIDIFY MENU

MODE DEHUMIDIFY

MAIN MENU

OFF

45%

SELECT

FIGURE 13

4 − To turn off dehumidification control entirely, select OFF.

(The default setting for dehumidification is OFF.) To turn on basic dehumidification mode, select BASIC. To turn on precision dehumidification mode, select PRECISION. See figure 14.

Setting Dehumidify Mode

HUMIDIFY MODE

OFF BASIC PRECISION

HUM MENU

SELECT

FIGURE 14

5 − The Humidity Menu appears. Basic (BAS) is displayed

on the right hand of the screen. Now you can program the dehumidity percentage that you want.

Page 23

Setting Dehumidity Levels

HUMIDIFY MENU

MODE DEHUMIDIFY

BAS

45%

Setting Dehumidity Levels

DEHUMIDIFY MENU

MODE

DEHUMIDIFY

OFF

45%

MAIN MENU

SELECT

FIGURE 15

Dehumidity Sensor Settings

The dehumidity sensor settings have minimum and maximum settings. The sensor settings can be adjusted in 1% increments. See table 9.

TABLE 9

Dehumidity Setpoint

Range

Minimum setting 45%

Maximum setting 60%

1 − On the humidity menu press the up or down button to

again highlight DEHUMIDIFY. See figure 16.

MAIN MENU

SELECT

Figure 16

2 − Use the up and down button to adjust the humidity level.

See figure 17.

Setting Dehumidity Levels

DEHUMIDIFY

CONTROL

MAIN MENU

Figure 17

SELECT

Page 24

TABLE 10

TYPICAL CBX32MV, CCB1 and TWO−SPEED OUTDOOR UNIT OPERATING SEQUENCE

OPERATING SEQUENCE

System

Condition

Normal operation

Call for humidity re-

moval during 1st stage thermostat

demand.

Significant increase

in humidity

during thermostat

demand.

Humidity demand

satisfied during

thermostat

demand.

Call for humidity re-

moval during 2nd

stage thermostat de-

mand.

*Call for 1st stage

cooling after call for

humidity removal.

Call for 2nd stage

cooling after call for

humidity removal.

Call for cooling after

significant increase in

humidity.

Humidity demand sat-

isfied between thermo-

stat demands (unit off

cycle).

Note−When changing unit mode of operation from cooling to heating, indicating lights that are on will stay on until the first thermostat heating demand.

*IMPORTANT-If power to unit is turned on with CCB1 calling for humidity removal, outdoor unit may be locked into high speed indefinitely. To reset, move humidity slide switch all the way down then back up to desired setpoint (with unit running) ** Reduced blower speed is 70% of cool for 018/024 and 024/030 units, 65% of COOL for the −036 units; 60% of COOL for −048 and −060 units. ***If the two−speed control on a two−speed outdoor unit is set for LATCH 2 (15 minutes) or LATCH 3 (30 minutes), the compressor will latch into high speed after a Y1 demand has occurred for that period of time.

Step

1 2

SYSTEM DEMAND

Thermostat

Demand

Y1 Y2

Y1 Acceptable (None)

Demand Satisfied

Y1 Slightly over setpoint (1) High

Y1 Acceptable (None) Low

None Acceptable (None) Off Off

Y1 Acceptable (None) Low 40% of COOL

Y2 Acceptable (None) High

None Slightly over setpoint (1) Off Off

Y1 Slightly over setpoint (1) Low

None

Y1 or Y2 High

None

Y1 or Y2 High

*Relative Humidity

(EfficiencyPlus

Lights)

Acceptable (None) Acceptable (None)

Change to

Slightly over setpoint (1)

Slightly over

setpoint (1)

Change to

Significantly over

setpoint (2 or more)

Over Setpoint

Change to

Acceptable (None)

Change to

Slightly over setpoint (1)

Significantly over

setpoint (2 or more)

Significantly over

setpoint (2 or more)

Over setpoint

(1 or more) Change to

Acceptable (None)

***

Compres-

sor Speed

Low 40% of COOL

High

Low 40% of COOL

Off Off

High

High COOL

High

Off Off

High

Off Off

Blower CFM

(COOL)

**60%/65%/70%

of COOL

40% of COOL

**60%/65%/70%

of COOL

**60%/65%/70%

of COOL

**60%/65%/70%

of COOL

40% of COOL

**60%/65%/70%

of COOL

**60%/65%/70%

of COOL

COOL

SYSTEM RESPONSE

Comments

Compressor demand and indoor blower

speed follow thermostat demand.

Dehumidification mode begins with next

thermostat demand after initial thermo-

stat demand is satisfied.

If humidity increases significantly over setpoint or if slide switch is moved significant-

ly, unit will immediately go into dehumidifi-

cation mode (in presence of thermostat de-

mand).

When humidity demand is satisfied,

blower immediately shifts to the COOL

CFM in order to hasten the end of the

cycle. Unit can only shift out of high

speed compressor operation at begin-

ning of next cycle.

Blower immediately changes speed in

response to thermostat demand.

Dehumidification mode (high speed com-

pressor) begins with next thermostat de-

mand after initial demand is satisfied.

Reduced blower speed

(dehumidification speed) begins imme-

diately with thermostat demand.

If humidity increases significantly over setpoint or if slide switch is moved, unit immediately goes into dehumidification

mode (in presence of thermostat de-

mand).

While unit is not operating (no thermo-

stat demand) slide switch is moved

down and back up. Blower and com-

pressor operate at high speed until next

thermostat demand.

Page 25

TYPICAL CBX32MV, CCB1 and SINGLE SPEED OUTDOOR UNIT OPERATING SEQUENCE

TABLE 11

OPERATING SEQUENCE

System

Condition

Normal operation

Call for humidity re-

moval during call

for cooling.

Humidity demand

satisfied during ther-

mostat demand.

*Call for cooling

after call for

humidity removal.

Humidity demand sat-

isfied between thermo-

stat demands (unit off

cycle).

Note−When changing unit mode of operation from cooling to heating, indicating lights that are on will stay on until the first thermostat heating demand.

* Reduced blower speed is 70% of COOL for 018/024 and 024/030, 65% of COOL for the −036 units; 60% of COOL for −048 and −060 series units.

Thermostat

Step

Demand

1 Y1 Acceptable (None)

SYSTEM DEMAND

Relative Humidity

(EfficiencyPlus Lights)

Y1 Acceptable (None)

None Over setpoint Off

Y1 Over setpoint

None

Change

over setpoint

Over Setpoint

Change to

Acceptable (None)

Over setpoint

(1 or more)

Change to

Acceptable (None)

Blower CFM

(COOL)

COOL

*60%/65%/70%

of COOL

*60%/65%/70%

of COOL

COOL

*60%/65%/70%

of COOL

Off

COOL

SYSTEM RESPONSE

Comments

Compressor demand and indoor blower

speed follow thermostat demand.

Dehumidification mode begins

when relative humidity is

greater than setpoint.

When humidity demand is satisfied,

blower immediately shifts to the

COOL CFM in order to hasten the end

of the cycle.

Dehumidification mode begins

when relative humidity is

greater than setpoint.

While unit is not operating (no thermo-

stat demand) slide switch is moved

down and back up. Blower operates at

COOL CFM.

TABLE 12

CBX32MV, SignatureStat or ComfortSense 7000 and SINGLE STAGE OUTDOOR UNIT

OPERATING

SEQUENCE

Thermostat Demand Relative Humidity

System

Condition

Step

Y1 O G

NO CALL FOR DEHUMIDIFICATION

Normal Operation 1 On On On Acceptable

BASIC MODE (only active on a Y1 thermostat demand)

Normal Operation 1 On On On Acceptable

Dehumidification

Call

2 On On On Demand

PRECISION MODE (operates independent of a Y1 thermostat demand)

Normal Operation 1 On On On Acceptable

Dehumidification

call

Dehumidification

call ONLY

2 On On On Demand

1 On On On Demand

Jumpers at indoor unit with a single stage outdoor unit With Condensing unit − Y1 to Y2 and R to O With Heat Pump − Y1 to Y2

SYSTEM DEMAND SYSTEM RESPONSE

Status D

VAC

Compres-

sor

High 100%

High

High 100%

High

60%/65%

Blower

CFM

(COOL)

60%/65

70%*

Comments

Compressor and indoor blower follow thermostat demand

SignatureStat energizes Y1 and de−energizes D on a call for dehumidification

Dehumidification mode begins when humidity is greater than set point

SignatureStat will try to maintain room humidity setpoint by allowing the room space to maintain a cooler room thermostat setpoint**

*During dehumidification, cooling blower speed is as follows: 70% of COOL cfm for 018/024, 024/030 & 068 65% for 036, 60% for 048 & 060 units. ** In Precision mode, Signature thermostat built BEFORE October 2003 will maintain the room temperature up to 3°F (1.8°C) cooler than room thermostat setting. Precision thermostat built AFTER October 2003 will maintain the room temperature up to 2°F (1.2°C) cooler than the room thermostat setting.

Page 26

TABLE 13

CBX32MV, SignatureStat or ComfortSense 7000 and TWO STAGE OUTDOOR UNIT

OPERATING

SEQUENCE

System

Condition

NO CALL FOR DEHUMIDIFICATION

Normal Operation −

ROOM THERMOSTAT CALLS FOR FIRST STAGE COOLING

BASIC MODE (only active on a Y1 thermostat demand)

Normal Operation 1 On On On Acceptable

Dehumidification

Call

PRECISION MODE (operates independent of a Y1 thermostat demand)

Normal Operation 1 On On On Acceptable

Dehumidification

call

Dehumidification

call ONLY

ROOM THERMOSTAT CALLS FOR FIRST AND SECOND STAGE COOLING

BASIC MODE (only active on a Y1 thermostat demand)

Normal Operation 1 On On On On Acceptable

Dehumidification

Call

PRECISION MODE (operates independent of a Y1 thermostat demand)

Normal Operation 1 On On On On Acceptable

Dehumidification

call

Step

1 On On On Acceptable

2 On On On On Acceptable

2 On On On On Demand

1 On On On On Demand

2 On On On On Demand

Thermostat Demand Relative Humidity

Y1 Y2 O G

SYSTEM DEMAND SYSTEM RESPONSE

W1W

Status D

VAC

Compressor

Low 70%

High 100%

Low 70%

High

Low 70%

High

High 100%

High

High 100%

High

Blower

CFM

(COOL)

60%/65%

70%*

60%/65%

70%*

60%/65%

70%*

60%/65%

70%*

60%/65%

70%*

Comments

Compressor and indoor blower follow thermostat demand

SignatureStat energizes Y2 and de−energizes D on a call for dehumidification

Dehumidification mode begins when humidity is greater than set point

SignatureStat will try to maintain room humidity setpoint by allowing the room space to maintain a cooler room thermostat setpoint**

SignatureStat energizes Y2 and de−energizes D on a call for dehumidification

Dehumidification mode begins when humidity is greater than set point

Dehumidification

call ONLY

1 On On On On Demand

Jumpers at indoor unit with a two stage outdoor unit With Condensing unit − Y2 and R to O With Heat Pump − none

VAC

High

60%/65%

70%*

SignatureStat will try to maintain room humidity setpoint by allowing the room space to maintain a cooler room thermostat setpoint**

*During dehumidification, cooling blower speed is as follows: 70% of COOL cfm for 018/024, 024/030 & 068 65% for 036, 60% for 048 & 060 units. ** In Precision mode, Signature thermostat built BEFORE October 2003 will maintain the room temperature up to 3°F (1.8°C) cooler than room thermostat setting. Precision thermostats built AFTER October 2003 will maintain the room temperature up to 2°F (1.2°C) cooler than the room thermostat setting.

Page 27

VI−CONFIGURATION MODIFICATIONS

CBX32MV unit may be installed in the upflow, downflow, horizontal right-hand discharge or horizontal left-hand discharge orientation.

The units come from the factory ready for upflow or horizontal right-hand discharge installation. If the unit needs to be modified from its original configuration, use the following procedures. All procedures assume the unit has not been modified from the factory.

A−Disassembly of CBX32MV Cabinet

For tight applications where a modular design is an advantage, the CBX32MV unit can be easily disassembled and reassembled. By removing four screws, the top blower section lifts off so the unit is in two parts. To disassemble the CBX32MV, use the following procedure.

1− Remove the two black screws located just above the

seam in the top half of the unit.

2− Remove the front access panel and remove the two

screws on the inside of the top half of the cabinet on both sides.

3− Lift the top section apart from the bottom section.

4− To lighten the cabinet for lifting, the blower and coil

assemblies can also be removed.

5− Reassemble once the cabinet is in place.

B−Upflow Application

1− Discard drip shields, if applicable. The shields are used

for downflow applications only and are located with the foam pads on top of unit.

2− For best efficiency and air flow, the horizontal drain

pan should be removed from units in upflow configurations.

3− After removing horizontal drain pan, place unit in

desired location. Set unit so that it is level. Connect return and supply air plenums as required using sheet metal screws. See figure 18.

UPFLOW CONFIGURATION

HORIZONTAL

DRAIN PAN*

UPFLOW/

DOWNFLOW

DRAIN PAN

*FOR OPTIMUM PERFORMANCE,

REMOVE HORIZONTAL DRAIN PAN.

FIGURE 18

C−Downflow Application

WARNING

If electric heat section with circuit breakers (ECB29) is applied to downflow CBX32MV unit, the circuit breakers must be rotated 180_ to the UP position. See ECB29 installation instructions for more details.

1− Remove drip shields shipped with the foam pads from

top of unit. The shields are used for downflow applications only and may need to be field fabricated if no

longer with unit. See table 14 for drip shields used. 2− Remove coil assembly from unit. 3− Remove horizontal drain pan. See figure 19.

TABLE 14

Unit

CBX32MV−018/024

CBX32MV−024/030 LB−74274 15.875 4.6718

CBX32MV−036 LB−74272 17.875 4.6718

CBX32MV−048, −060,

−068

Part No. Length Width

Not Required

LB−89864 19.875 4.6718

N/A N/A

Page 28

DOWNFLOW DISCHARGE CONFIGURATION

HORIZONTAL

DRAIN PAN*

DOWNFLOW DRIP SHIELDS

UPFLOW/

DOWNFLOW

DRAIN PAN

*FOR OPTIMUM

PERFORMANCE,

REMOVE

HORIZONTAL

DRAIN PAN.

FIGURE 19

4− Rotate cabinet 180_ from upright. It may be

necessary to first remove the blower assembly to lighten the cabinet for lifting.

5− Install downflow drip shield firmly in place on inside of coil

slab from under drain pan. See figures 20 and 21.

Coil

Drip Shield

Drip Pan

FIGURE 21

6− Replace coil assembly and blower if removed.

Replace coil access panel. If horizontal drain pan is not removed, depress tab in cabinet support rail to hold horizontal drain pan in place. See figure 19.

7− Set unit so that it is level. Connect return and supply air

plenums as required using sheet metal screws.

NOTE−For downflow application, metal or class I supply and return air plenums must be used.

For downflow installation on combustible flooring, an additive base must be used. See figure 22.

BLOWER

COIL UNIT

side view

1− Apply two pieces of foam tape (provided)

down both ends of each shield. The tape should measure 4 3/4" X 2" (120 X 25 mm). Ensure that the tape covers both sides of the shield equally.

2− Apply the longer piece of foam tape between

the pieces on each end. This piece of tape is 1" wide.

FIGURE 20

COMBUSTIBLE

FLOOR

ADDITIVE BASE

PROPERLY SIZE

FLOOR OPENING

FIGURE 22

Cut an opening appropriately sized for combustible base. Base dimensions are shown in figure 23. After opening has been cut, set the additive base into opening. Connect outlet air plenum to the additive base. Set the unit on the additive base so flanges of the unit drop into the base opening and seal against the insulation strips. Seal around the insulation strips with permagum. The unit is now locked in place. Install return air plenum and secure with sheet metal screws.

Page 29

DOWNFLOW COMBUSTIBLE BASE DIMENSIONS

Inches

(mm)

1-5/8

(41)

5/8

(16)

1-5/8

(41)

1-5/8

(41)

TOP VIEW

11-3/8

(289)

SUPPLY

AIR

OPENING

20 (508)

22-1/8

13-3/8 (340)

Opening

SIDE VIEW

(562)

23−1/4

(591)

2 (51)

FIGURE 23

D−Horizontal Right−Hand

Discharge Application

NOTE−For horizontal applications, a secondary drain pan is recommended. Refer to local codes.

1− Before operating the unit, remove access panels and

the horizontal drip shield (−068 model) and the corrugated padding between the blower and coil assembly. Discard the corrugated padding and the downflow drip shields from the foam pads on top of the unit.

2− Install the horizontal shield on the front edge of the

horizontal drain pan as shown in figure 24.

3− No further adjustment is necessary. Set unit so it is

sloped toward the drain pan (1/4" [6mm]). See figure

24.

4− If hanging the unit, it must be supported along the entire

length of the cabinet. If using chain or strap, use a piece of angle iron or sheet metal attached to the unit (either above or below) so that the full length of the cabinet is supported. Use securing screws no longer than 1/2" (13mm) to avoid damage to coil or filter. See figure

25. Connect return and supply air plenums as required using sheet metal screws.

NOTE−For horizontal applications in high humidity areas, remove the downflow rail closest to the drain pan.

Removal of downflow rail will prevent sweating in high humidity areas. To remove rail, remove screw from rail at back of unit and at cabinet support rail. Remove downflow rail then replace screws. Also, seal around the exiting drain pipe, liquid and suction lines to prevent infiltration of humid air.

RIGHT−HAND DISCHARGE CONFIGURATION

UPFLOW / DOWNFLOW DRAIN PAN

HORIZONTAL

DRAIN PAN

HORIZONTAL DRIP SHIELD (−068 MODELS)

DOWNFLOW RAIL

No Adjustment Is Necessary

FIGURE 24

HANGING HORIZONTAL UNIT

1/2" (13mm) Screws max.

ANGLE IRON

SHEET METAL

FRONT VIEW END VIEW

Electrical Inlet

Clearance

4 in. (102 mm)

FIGURE 25

CAUTION

Danger of equipment damage and personal injury. Take care when removing coil assembly from unit installed in right or left−hand applications. Coil may tip into drain pan once clear of cabinet. Support coil when removing.

Page 30

E−Horizontal Left−Hand

Discharge Application

NOTE−For horizontal applications above the ceiling, a secondary drain pan is recommended. Refer to local codes.

1− Remove access panels and horizontal drip shield (−068

model) from the corrugated padding between the blower and coil assembly. Discard the corrugated padding and the downflow drip shields from the foam pads on top of the unit. (The shields are used for downflow applications only.)

2− Pull the coil assembly from unit. Pull off the horizontal

drain pan.

3− Remove drain plugs from back drain holes on

horizontal drain pan and re-install them on front holes.

4− Rotate drain pan 180_ front to back and install it on the

opposite side of coil.

5− Remove screws from top cap. Remove horizontal drip

shield screw located in the center of the back coil end

seal. See figure 26. 6− Rotate horizontal drip shield 180_ front to back. 7− Remove plastic plug from left hole on coil front end

seal and re-install plug in back hole. Re-install

horizontal drip shield screw in front coil end seal. Drip

shield should drain downward into horizontal drain

pan inside coil. 8− Rotate top cap 180_ front to back and align with

unused screw holes. Holes must align with front and

back coil end plates. Note that top cap has a 45_ bend

on one side and 90_ bend on the other. The 90_ bend

must be on the same side as the horizontal drain pan.

See figures 26 and 27.

NOTE−Use extreme care when re-installing screws into coil end plate engaging holes. Coil damage could result by misalignment.

90_ BEND

TOP CAP

BACK COIL END

SEAL

FIGURE 27

9− From the upflow position, replace coil assembly.

Then flip cabinet 90_ to the left and set into place. Replace coil assembly. Secure coil in place by bending down tab on cabinet support rail. See figures 26 and 28.

LEFT−HAND DISCHARGE CONFIGURATION

SECURING TAB ON CABINET

SUPPORT RAIL

DOWNFLOW RAIL

HORIZONTAL DRIP SHIELD

HORIZONTAL

DRAIN PAN

FIGURE 28

10− Install the horizontal shield (−068 model) on the front

edge of the horizontal drain pan as shown in figure 29.

LEFT−HAND DISCHARGE CONFIGURATION

HORIZONTAL DRIP SHIELD (−068 MODEL)

CABINET

SUPPORT

90_

BEND

FIELD MODIFICATION FOR

LEFT−HAND DISCHARGE

COIL SHOWN IN UP-FLOW POSITION

FOR EASY CONVERSION

FIGURE 26

DOWNFLOW

RAIL

FIGURE 29

FRONT EDGE OF HORIZONTAL DRAIN PAN

NOTE−For horizontal applications in high humidity areas, remove the downflow rail closest to the drain pan.

To remove rail, remove screw from rail at back of unit and

at cabinet support rail. Remove downflow rail then replace screws. Also, seal around the exiting drain pipe, liquid and suction lines to prevent infiltration of humid air.

11− Flip access door. Knock out the portion of door for the

drain pipes and attach to the cabinet with screw provided. Replace access door on the unit.

Page 31

12− Set unit so it is sloped toward the drain pan (1/4"

[6mm]). Connect return and supply air plenums as required using sheet metal screws.

13− If hanging the unit, it must be supported along the entire

F−Condensate Drain

A 5" (127mm) section of PVC pipe is provided with the unit. Cut the pipe in half and use to route the auxiliary and main drains. Connect main condensate drain and route downward to an open drain or sump. Do not connect dr a i n to a cl o s e d waste system. Refer to figure 30 for typical condensate trap configuration.

TYPICAL CONDENSATE DRAIN CONNECTION

MINIMUM 1 INCH (25 mm)

PITCH PER 10 FEET

(3048 mm) OF LINE

Trap must be deep enough to offset maximum static difference (Generally, 2 inches [51mm] minimum).

FIGURE 30

It is recommended that the auxiliary drain be connected to a drain line for all units. If auxiliary drain is not connected, it must be plugged with provided cap. For downflow

units, the auxiliary drain MUST be connected and routed to a drain. See figure 31 for auxiliary and main

drain locations.

LEFT−HAND

DISCHARGE

UPFLOW OR DOWNFLOW

PIPE DIAMETER

DIFFERENCE

COIL

DRAIN

PAN

RIGHT−HAND

DISCHARGE

4− Horizontal runs must be sloped 1" (25mm) per 10 feet

(3.1m) of drain line to offset friction.

5− An open vent in drain line will sometimes be required due

to line length, friction and static pressure.

6− Drains should be constructed in a manner to facilitate

future cleaning and not to interfere with filter access. See figure 30.

7− Auxiliary drain should run to an area where homeowner

will notice it draining. Refer to local codes.

VII−START-UP − OPERATION A−Preliminary and Seasonal Checks

1− Make sure the unit is installed in accordance with the

installation instructions.

2− Inspect electrical wiring, both field and factory installed for

loose connections. Tighten as required.

3− Check voltage at disconnect switch. Voltage must be

within range listed on the nameplate. If not, consult t h e power company and have voltage condition corrected before starting unit.

4− Check to ensure that refrigerant lines are in good

condition and pipe insulation is intact.

5− Inspect condition of condensate drain pan and piping

assembly. Disassemble and clean seasonally.

B−Cooling Start-Up

NOTE−The following is a generalized procedure and does not apply to all thermostat control systems. Electronic thermostat control systems may operate differently.

1− Set fan switch to AUTO or ON and move the system

selection switch to COOL. Adjust the thermostat to a setting far enough below room temperature to bring on the compressor. Compressor will start and cycle on demand from the thermostat.

2− The refrigerant circuit is charged with R410A

refrigerant. See condensing unit rating plate for correct charge amount.

3− Refer to the correct condensing unit service manual for

more information.

C−Heating Start-Up

AUXILIARY DRAIN ON LEFT

MAIN DRAIN ON RIGHT

FIGURE 31

The following practices are recommended to ensure condensate removal:

1− Drain piping should not be smaller than the drain

connections at drain pan.

2− A trap must be installed in the main drain line.

3− The trap must be deep enough to offset the difference in

static pressure between drain pan and atmosphere. Generally, two inches is satisfactory for medium static applications.

1− Set the fan switch to AUTO or ON and move the

system selection switch to HEAT. Adjust the thermostat setting above room temperature.

2− The indoor blower immediately starts and the electric heat

will stage on based on sequence timing.

D−Safety or Emergency Shutdown

Turn off unit power at circuit breaker.

E−Extended Period Shutdown

Turn off thermostat or set to UNOCCUPIED" mode. Turn off power to unit. All access panels and covers must be in place and secured. The condensate assembly should be clean and dry for extended period shutdown.

Page 32

VIII−TYPICAL OPERATING CHARACTERISTICS

IX−MAINTENANCE

A−Blower Operation and Adjustment

NOTE− The following is a generalized procedure and does not apply to all thermostat controls.

1− Blower operation is dependent on thermostat

control system.

2− Generally, blower operation is set at thermostat

subbase fan switch. With fan switch in ON position,

blower operates continuously. With fan switch in AUTO

position, blower cycles with demand.

3− In all cases, blower and entire unit will be off when the

system switch is in OFF position.

B−External Static Pressure

1. Measure tap locations as shown in figure 32.

STATIC PRESSURE TEST

SUPPLY

MANOMETER

RETURN

FIGURE 32

2. Punch a 1/4" (6mm) diameter hole in supply and return

air plenums. Insert manometer hose flush with inside

edge of hole or insulation in the supply plenum only. Seal

around the hose with permagum. Connect the other end

of the hose to the zero end of the manometer. Leave the

other end of the manometer open to the atmosphere.

3. With only the blower motor running and the

evaporator coil dry, observe and take note of the

manometer reading.

4. Repeat step 2 for the return air plenum. Insert

manometer hose to the opposite end of the zero side

of the manometer. Leave the zero side of the

manometer open to atmosphere.

5. Repeat step 3.

6− Add the absolute values of the supply air reading and the

return air reading to get the external static pressure of the

unit. For example −.20 in.wg. on the return and +.30 in.wg.

on the supply result in external static pressure of .50 in.wg.

External static should not exceed .80" w.g. (200Pa)

Adjust blower motor speed to deliver the air desired

according to job requirements. 7− Seal around the holes when the check is complete.

UNIT SHOWN IN

UPFLOW POSITION

WARNING

At the beginning of each heating/cooling season, the system should be checked as follows:

A−Filters

IMPORTANT

Filter access panel must be in place during unit operation. Excessive warm air entering the unit may result in water blow−off problems.

To remove filter, loosen the thumb screws holding the filter panel in place. Slide filter out of the guides on either side of cabinet, insert new filter and replace panel. Some models come with a spacer so standard size filters can be used. Filters should be inspected monthly and must be replaced when dirty to ensure proper blower coil operation. See table 15 for replacement filter sizes or see the sticker located on the filter access door specifying the size of the standard throw-away filter which is used with the unit.

TABLE 15

CBX32MV FILTER SIZES

Unit Filter Size

CBX32MV018/024 15" X 20" (381mm X 508mm)

CBX32MV−024/030 20" X 20" (508mm X 508mm)

CBX32MV−036 20" X 22" (508mm X 599mm)

CBX32MV−048, −060 20" X 24" (508mm X 610mm)

CBX32MV−068 20" X 25" (508mm X 635mm)

B−Supply Air Blower

1- Check and clean blower wheel. 2- Motors are pre−lubricated for extended life; no further

lubrication is required.

C−Electrical

1- Check all wiring for loose connections. 2- Check circuit breaker located in unit control box. 3- Check for correct voltage at unit (unit operating). 4- Check amp-draw using a True root mean square

(RMS) amperage meter. Typical clamp−on ammeters do not read current accurately.

5- Check to see that heat (if applicable) is operating.

D−Insulation

Outdoor piping insulation should be inspected yearly for deterioration. If necessary, replace with same materials.

Page 33

X−WIRING SCHEMATIC AND OPERATION SEQUENCE

A−CBX32MV − 208/230V SINGLE PHASE − SEQUENCE OF OPERATION

1. Line voltage is routed to transformer T1 and blower motor B3.

2. T1 supplies 24VAC to terminal strip TB1, which supplies 24VAC to the indoor thermostat and electric heat, if used.

HEATING

3. When there is a call for heat, W1 of the thermostat energizes the electric heat relay K32 (covered in the electric heat section). After K32 closes, blower relay K20−1 is energized.

4. Blower motor B3 is energized on heating speed after K20−1 closes (see electric heat).

5. Economizer relay K20−2 (if used) is energized after K32-1 closes (see electric heat section).

6. K20−2 closes energizing the economizer with 24VAC.

COOLING

7. See Table 16 for cooling sequence of operation.

Page 34

TABLE 16

CBX32MV COOLING OPERATION AND JUMPER SUMMARY (OPTIONAL ACCESSORIES) WITHOUT

SignatureStat OR CCB1 WITHOUT HARMONY

UNIT JUMPERS

Single Speed

Condensing Unit

Two Speed

Condensing Unit

Single Speed Heat Pump

Two Speed Heat Pump DS to Y1

CBX32MV COOLING OPERATION AND JUMPER SUMMARY (OPTIONAL ACCESSORIES)

UNIT JUMPERS THERMOSTAT DEMAND & BLOWER SPEED

Single Speed

Condensing Unit

Two Speed

Condensing Unit

Single Speed Heat Pump Y1 to Y2 See table 11

Two Speed Heat Pump NONE See table 10

CBX32MV COOLING OPERATION AND JUMPER SUMMARY (OPTIONAL ACCESSORIES)

WITH SignatureStat WITHOUT HARMONY

UNIT JUMPERS THERMOSTAT DEMAND & BLOWER SPEED

Single Speed

Condensing Unit

Two Speed

Condensing Unit

Single Speed Heat Pump Y1 to Y2 See table 12

Two Speed Heat Pump NONE See table 13

CBX32MV COOLING OPERATION AND JUMPER SUMMARY (OPTIONAL ACCESSORIES)

WITHOUT SignatureStat OR CCB1 WITH HARMONY

UNIT JUMPERS SEQUENCE OF OPERATION

Single or Two Speed

Condensing Unit

Single or Two Speed

Heat Pump

DS to Y1

Y1 to Y2

O to R

DS to Y1

O to R

DS to Y1 Y1 to Y2

WITH CCB1 WITHOUT HARMONY

Y1 to Y2

O to R

O to R See table 10

Y1 to Y2

O to R

O to R See table 13

O to R

NONE

THERMOSTAT

DEMAND

Y1 COOL

Y1 *60%/65%/70% of COOL

Y2 COOL

Y1 COOL

Y1 *60%/65%/70% of COOL

Y2 COOL

See table 12

Harmony controls blower speed according to size

of demand, through pulse width modulated signal

Harmony controls blower speed according to size

of demand, through pulse width modulated signal

BLOWER SPEED

See table 11

to DS

NOTE: CAUTION HIGH VOLTAGE If using Harmony kit, locate blower relay K20 and remove and tape off any one of four wires.

NOTE: Continuous fan CFM will be 50% of COOL speed. Blower will run on HEAT speed during Heat operation.

*Production August 2002 and later − Reduced blower speed is 70% of COOL for ALL model units. Production prior to August 2002

− Reduced blower speed is 65% of COOL for the −036 units and 60% of COOL for −048 and −060 units.

Page 35

B−ECB29-5, -5CB, -8, -8CB − 208/230V SINGLE PHASE − SEQUENCE OF OPERATION

1. When there is a call for heat, W1 of the thermostat energizes the electric heat relay K32 with 24VAC.

2. When K32-1 closes, the blower is energized on heating speed and economizer heat relay (K20-2) is energized (see unit schematic, figure 26).

3. Assuming the N.C. primary (S15) and secondary (S20) limit switches are closed, electric heat element HE1 is energized.

4. When K32-2 closes, assuming the N.C. primary (S15) and secondary (S20) limit switches are closed, electric heat element HE2 is energized.

Page 36

D−ECB29-12.5CB, -15CB − 208/230V SINGLE PHASE − SEQUENCE OF OPERATION

FIRST−STAGE HEAT

1. When there is a call for heat, W1 of the thermostat energizes the electric heat relay K32 with 24VAC.

2. When K32-1 closes, the blower is energized on heating speed and economizer heat relay (K20-2) is energized (see unit schematic figure 26).

3. Assuming the N.C. primary (S15) and secondary (S20) limit switches are closed, electric heat element HE1 is energized.

SECOND−STAGE HEAT (remove jumper between W2 and R)

4. When K32-2 closes, the unit is ready for a second stage heat demand. W2 of the thermostat sends a second stage heat demand, energizing the electric heat relay K33 with 24VAC.

5. When K33-1 and K33-2 close, assuming the N.C. primary (S15) and secondary (S20) limit switches are closed, electric heat elements HE2 and HE3 are energized.

Page 37

F−ECB29-25CB − 208/230V SINGLE PHASE − SEQUENCE OF OPERATION

FIRST−STAGE HEAT

1. When there is a call for heat, W1 of the thermostat energizes the electric heat relays K32 and K34 with 24VAC.

2. When K32-1 closes, the blower is energized on heating speed and economizer heat relay (K20-2) is energized (see unit schematic 26).

3. When K32-1 and K32-2 closes, assuming the N.C. primary (S15) and secondary (S20) limit switches are closed, electric heat elements HE1 and HE2 are energized.

SECOND−STAGE HEAT (remove jumper between W2 and R)

4. When K34-1 closes, the unit is ready for a second stage heat demand. W2 of the thermostat sends a second stage heat demand, energizing the electric heat relays K33 and K116 with 24VAC.

5. When K33-1 closes, the blower (if not energized) is energized on heating speed and economizer heat relay K43 is energized (see 208/230VAC CB schematic).

6. When K33-2 and K116-1 close, assuming the N.C. primary (S15) and secondary (S20) limit switches are closed, electric heat elements HE3 and HE6 are energized.

THIRD− STAGE HEAT (remove jumper between W3 and R, if using third stage)

7. When K34-2 closes, the unit is ready for a third stage heat demand. W3, if available, of the thermostat sends a third stage heat demand, energizing the electric heat relay K35 with 24VAC.

8. When K35-1 and K35-2 close, assuming the N.C. primary (S15) and secondary (S20) limit switches are closed, electric heat elements HE4 and HE5 are energized.

Page 38

G−ECB29-8, -10,−15CB − 208/230V THREE PHASE − SEQUENCE OF OPERATION

1. When there is a call for heat, W1 of the thermostat energizes the electric heat relays K32 and K33 with 24VAC.

2. When K32-1 and/or K33-1 closes, the blower is energized on heating speed and economizer heat relay (K20-2) is

energized (see unit schematic figure 26).

3. When K32-1, K32-2, and K33-2 closes, assuming the N.C. primary (S15) and secondary (S20) limit switches are closed, electric heat elements HE1, HE2, and HE3 are energized.

Page 39

H−ECB29-20CB, -25CB − 208/230V THREE PHASE − SEQUENCE OF OPERATION

FIRST−STAGE HEAT

1. When there is a call for heat, W1 of the thermostat energizes the electric heat relays K32 and K34 with 24VAC.

2. When K32-1 closes, the blower is energized on heating speed and economizer heat relay (K20-2) is energized (see unit schematic figure 26).

3. When K32-1 and K32-2 closes, assuming the N.C. primary (S15) and secondary (S20) limit switches are closed, electric heat elements HE1 and HE2 are energized.

4. When K34-1 closes, assuming the N.C. primary (S15) and secondary (S20) limit switches are closed, electric heat element HE3 is energized.

SECOND−STAGE HEAT (remove jumper between W2 and R)

5. When K34-2 closes, the unit is ready for a second stage heat demand. W2 of the thermostat sends a second stage heat demand, energizing the electric heat relays K33 and K35 with 24VAC.

6. When K33-1 closes, the blower (if not energized) is energized on heating speed and economizer heat relay K43 is energized (see 208/230VAC CB schematic).

7. When K33-1, K35-1, and K35-2 contacts close, assuming the N.C. primary (S15) and secondary (S20) limit switches are closed, electric heat elements HE4, HE5, and HE6 are energized.

Page 40

Lennox CBX32MV, CBX32MV-048, CBX32MV-060, CBX32MV-068 Series Manual

Specifications and Main Features

Frequently Asked Questions

User Manual