Lennox LHT/LDT024 Installation Instructions Manual Download Page 16

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Page 17

BLOWER DA

0.5 HP

| 3 ROW (024, 036)

BLOWER T

ABLE INCLUDES RESIST

ANCE FOR BASE UNIT ONL

Y WITH DR

Y INDOOR COIL

AND

AIR FIL

TERS IN PLACE.

FOR

ALL

UNITS ADD:

1 -

Any factory installed options air resistance (heat section, economizer

, etc.).

2 -

Any field installed accessories air resistance (duct resistance, diffuser

, etc.).

Minimum

Air V

olume Required For Different Gas Heat Sizes:

Standard Heat - 1075 cfm; Medium Heat - 1

150 cfm; High Heat - 1500 cfm

See page 23 for wet coil and options/accessory air resistance data.

DOWNFLOW

External

Static

Press.

in. w

.g.

Percentage of T

otal Motor T

orque

20%

30%

40%

50%

60%

70%

80%

90%

100%

Cfm

atts

RPM

Cfm

atts

RPM

Cfm

atts

RPM

Cfm

atts

RPM

Cfm

atts

RPM

Cfm

atts

RPM

Cfm

atts

RPM

Cfm

atts

RPM

Cfm

atts

RPM

819

403

1006

463

1192

111

523

1335

152

573

1477

193

622

1580

236

661

1682

279

699

1812

353

753

1876

400

783

0.1

723

485

919

539

111

593

1264

159

637

1414

202

681

1522

246

715

1629

290

749

1767

365

797

1835

414

824

0.2

636

565

840

613

1044

124

660

1201

169

699

1357

213

738

1470

258

769

1582

303

799

1726

380

841

1797

429

865

0.3

557

641

769

683

981

134

725

1144

180

760

1306

226

794

1423

273

821

1540

319

848

1689

397

885

1761

446

906

0.4

485

713

704

106

750

923

146

787

1091

194

818

1259

241

848

1380

289

872

1500

336

895

1653

415

929

1725

463

948

0.5

418

783

644

815

870

158

846

1043

207

873

1215

256

900

1339

305

921

1462

353

942

1618

433

973

1689

481

991

0.6

355

849

587

127

876

819

171

903

996

222

927

1173

272

950

1299

321

969

1425

370

987

1582

451

1016

1651

499

1034

0.7

- - -

769

184

957

950

236

978

1131

287

998

1259

337

1015

1387

387

1032

1544

468

1058

1610

516

1077

0.8

- - -

720

195

1008

904

248

1026

1088

301

1044

1218

352

1060

1347

403

1075

1503

484

1101

1565

531

1121

0.9

- - -

670

206

1057

857

260

1073

1043

314

1088

1173

366

1102

1303

417

111

1458

498

1142

- - -

1.0

- - -

617

214

1102

806

269

111

994

324

1130

1125

376

1144

1255

428

1157

1406

510

1184

- - -

1.1

- - -

561

219

1145

751

276

1157

941

332

1169

1071

384

1183

1200

436

1196

1347

518

1225

- - -

1.2

- - -

500

221

1185

691

278

1196

881

335

1207

1010

388

1221

1139

441

1234

1280

522

1265

- - -

1.3

- - -

814

335

1242

942

388

1256

1069

441

1270

- - -

1.4

- - -

738

330

1276

864

384

1291

989

437

1305

- - -

HORIZONT

External

Static

Press.

in. w

.g.

Percentage of T

otal Motor T

orque

20%

30%

40%

50%

60%

70%

80%

90%

100%

Cfm

atts

RPM

Cfm

atts

RPM

Cfm

atts

RPM

Cfm

atts

RPM

Cfm

atts

RPM

Cfm

atts

RPM

Cfm

atts

RPM

Cfm

atts

RPM

Cfm

atts

RPM

794

388

970

454

1146

107

519

1281

149

575

1416

191

630

1522

678

1627

293

726

1715

351

768

1802

408

810

0.1

709

460

895

519

1080

111

577

1223

155

627

1366

199

677

1477

251

721

1588

303

764

1681

362

804

1773

420

843

0.2

630

531

855

583

1019

634

1169

163

679

1318

208

723

1435

262

763

1552

315

803

1648

375

841

1743

434

878

0.3

556

602

759

646

961

125

690

111

172

730

1273

219

769

1395

274

805

1516

328

841

1615

388

877

1714

448

912

0.4

486

671

696

709

906

135

746

1068

184

781

1230

232

815

1356

288

848

1481

343

880

1582

403

914

1683

463

948

0.5

420

740

637

107

771

854

147

802

1021

196

831

1188

245

860

1317

301

890

1446

357

919

1549

418

951

1652

478

983

0.6

- - -

804

159

856

946

209

881

1147

259

905

1279

316

932

1410

372

958

1514

432

989

1618

492

1019

0.7

- - -

756

172

910

932

223

930

1107

273

949

1241

330

973

1374

386

996

1478

446

1026

1582

506

1055

0.8

- - -

709

185

962

888

236

978

1066

287

993

1201

344

1014

1336

400

1034

1440

460

1063

1544

519

1091

0.9

- - -

663

197

1013

844

249

1025

300

1036

1161

357

1054

1296

413

1072

1399

472

1100

1502

530

1127

1.0

- - -

982

313

1078

111

369

1094

1254

424

1109

1355

482

1136

1456

540

1163

1.1

- - -

938

323

111

1073

379

1133

1208

434

1146

1307

491

1172

1406

548

1198

1.2

- - -

892

332

1158

1026

387

1170

1159

441

1182

1255

497

1208

1351

553

1233

1.3

- - -

843

340

1197

975

393

1207

1106

446

1216

1198

501

1242

1290

555

1268

1.4

- - -

790

344

1234

920

396

1242

1049

448

1250

1137

501

1276

1224

553

1302

Summary of Contents for LHT/LDT024

Page 1: ...s Page 26 INSTALLATION INSTRUCTIONS LHT LDT024 LHT LDT036 LHT LDT048 LHT LDT060 2 Ton 3 Ton 4 Ton 5 Ton HEAT PUMP AND DUAL FUEL PACKAGED UNITS 508303 01 10 2022 Cooling Operation Page 32 Gas Heat Star...

Page 2: ...TOM SUPPLY AIR OPENING TOP VIEW Base CENTER OF GRAVITY 9 1 2 241 6 5 8 168 26 1 2 673 5 5 8 143 29 737 7 178 BOTTOM RETURN AIR OPENING BOTTOM CONDENSATE OUTLET 25 3 4 654 BOTTOM POWER ENTRY 3 X 8 76 X...

Page 3: ...BLOWER COMPRESSOR CONDENSER COIL REVERSING VALVE INDOOR TXV OUTDOOR TXV UNIT CONTROLLER ELECTRIC HEAT LDT024 036 048 060 PARTS ARRANGEMENT 8 8 8 8 EVAPORATOR COIL CONDENSER FAN CONDENSATE DRAIN FILTER...

Page 4: ...Installation of Residence Type Warm Air Heating and Air conditioning Systems NFPA No 90B local municipal building codes and manufacturer s installation instructions IMPORTANT The Clean Air Act of 1990...

Page 5: ...air by pass and promote a proper seal with the RTU duct work duct drops diffuser assemblies must be supported independently to the building structure A Downflow Discharge Application Roof Mounting wit...

Page 6: ...ght with all available factory installed accessories 378 400 Unit Weight Lbs Kg CAUTION Do not walk on unit 833 881 Horizontal Air Discharge Unit is shipped with panels covering the horizontal supply...

Page 7: ...mm per 10 3 m of line MOUNTING FRAME OPEN VENT CONDENSATE SIDE DRAIN CONNECTION NOTE Allow clearance to open doors when installing condensate piping CAULK AROUND CONDENSATE COUPLING FIGURE 6 UNIT Min...

Page 8: ...Replace the condensate drain mullion Connect Gas Piping Gas Units Before connecting field provided piping check with gas company or authorities having jurisdiction for local code requirements When ins...

Page 9: ...ound joint type After all connections have been made check all piping connections for gas leaks Also check existing unit gas connections up to the gas valve loosening may occur during installation Use...

Page 10: ...refer to the Unit Controller Setup Guide for start up instructions Electrical Connections Power Supply Do not apply power or close disconnect switch until installation is complete Refer to start up di...

Page 11: ...up Guide to change the System Mode Use the mobile service app menu and select Settings Install Thermostat Mode 1 Route thermostat cable or wires from subbase to control area above compressor refer to...

Page 12: ...r air temperature falls below setpoint the unit will operate in gas heat mode Note Only stage one is used stage 2 is not used Although the recommended balance point setpoint is 35 F the setpoint can b...

Page 13: ...ately stop when power is interrupted to the Unit Controller Disconnect unit power before opening the blower compartment The Controller s digital inputs must be used to shut down the blower See Unit Co...

Page 14: ...ATION CFM This is the percentage of torque for high static blower ventilation speed TABLE 3 ELECTRIC HEAT MINIMUM AIRFLOW kW CFM Direct Drive Direct Drive Impeller Style 5 600 NA 7 5 600 1200 10 600 N...

Page 15: ...eed for standard static blowers BLOWER VENTILATION CFM Percentage of torque for high static blower ventilation speed SETUP TEST BALANCE DAMPER BLOWER HIGH CFM DAMPER POS Minimum damper position for hi...

Page 16: ...498 1142 1 0 617 214 1102 806 269 1116 994 324 1130 1125 376 1144 1255 428 1157 1406 510 1184 1 1 561 219 1145 751 276 1157 941 332 1169 1071 384 1183 1200 436 1196 1347 518 1225 1 2 500 221 1185 691...

Page 17: ...5 1109 1766 747 1135 1920 859 1161 2104 1038 1200 1 1 1148 434 1087 1366 545 1115 1583 655 1142 1734 765 1166 1885 874 1189 2060 1047 1227 1 2 1120 456 1124 1334 564 1149 1548 671 1173 1695 777 1195 1...

Page 18: ...58 752 1143 1911 864 1169 2090 1042 1209 1 1 1144 437 1092 1360 548 1120 1576 659 1148 1725 769 1173 1874 878 1197 2043 1049 1236 1 2 1115 458 1129 1328 566 1154 1540 674 1179 1685 780 1202 1829 886 1...

Page 19: ...0 2369 634 2408 671 2447 708 2000 2112 405 2158 438 2202 471 2246 503 2289 536 2331 568 2373 602 2413 640 2452 681 2490 723 2527 766 2564 809 2599 851 2200 2305 493 2347 531 2389 569 2429 608 2469 648...

Page 20: ...469 2110 496 2153 520 1600 1778 258 1827 290 1876 323 1923 355 1970 386 2015 416 2059 444 2102 470 2144 494 2185 519 2227 545 2268 572 2309 600 1800 1973 352 2018 383 2063 415 2107 445 2151 476 2194...

Page 21: ...78 650 2418 682 2458 714 2000 2127 415 2172 448 2217 481 2260 513 2303 546 2345 579 2385 614 2425 653 2464 693 2503 734 2541 774 2578 814 2614 855 2200 2321 507 2363 545 2404 583 2444 623 2484 664 252...

Page 22: ...692 2484 727 2000 2202 451 2242 482 2283 513 2323 545 2363 577 2402 611 2440 646 2477 683 2512 722 2546 763 2579 804 2613 844 2645 884 2200 2408 559 2446 596 2483 633 2520 672 2555 712 2590 753 2623...

Page 23: ...0 04 0 07 0 18 0 05 0 05 0 08 0 11 2400 0 13 0 04 0 05 0 08 0 20 0 05 0 05 0 08 0 12 Page 23 BLOWER DATA POWER EXHAUST FAN PERFORMANCE Return Air System Static Pressure in w g Air Volume Exhausted cfm...

Page 24: ...rvice app menu path RTU MENU COMPONENT TEST COOLING COOLING STAGE 2 2 Units contain one refrigerant circuit Note Units are equipped with two stage compressors 3 Unit is charged with R 410A refrigerant...

Page 25: ...uid temperature at condenser outlet minus ambient temperature 2 Approach temperature should be 3 8 F 1 2 1 C 0 5 An approach temperature greater than this value indicates an under charge An approach t...

Page 26: ...and apply power to unit Defrost Control The defrost control ensures that the heat pump outdoor coil does not ice excessively during the heating mode The defrost control uses input from the coil and am...

Page 27: ...Page 27 LHT LDT024 036 048 060 FIGURE 18 YELLOW RT46 CLAMP THERMISTOR TO BARE COPPER DETAILS NOT TO SCALE 22J06 LHT LDT024 036 048 INDOOR COIL RT46...

Page 28: ...Page 28 LHT LDT024 036 048 060 FIGURE 19 YELLOW RT48 22J08 LHT LDT024 036 OUTDOOR COIL RT48...

Page 29: ...Page 29 LHT LDT024 036 048 060 FIGURE 20 LHT LDT048 OUTDOOR COIL RT48 CLAMP THERMISTOR TO BARE COPPER DETAILS NOT TO SCALE YELLOW RT48 22J08...

Page 30: ...Page 30 LHT LDT024 036 048 060 FIGURE 21 YELLOW RT46 CLAMP THERMISTOR TO BARE COPPER DETAILS NOT TO SCALE LHT LDT060 INDOOR COIL RT46 22J06...

Page 31: ...Page 31 LHT LDT024 036 048 060 FIGURE 22 CLAMP THERMISTOR TO BARE COPPER DETAILS NOT TO SCALE LHT LDT060 OUTDOOR COIL RT48 YELLOW RT48 22J08...

Page 32: ...Blower Low Dampers Modulate Y2 Demand Compressor On 024 units only Compressor Low 036 060 Blower High Dampers Full Open Note Compressor is energized after damper has been at full open for three minut...

Page 33: ...Gas heat is also energized during the defrost cycle 2 Outdoor Temperature BELOW Balance Point Setpoint W1 Demand Compressor Off Blower Heating Speed Low Gas Heat Energized W2 Demand Compressor Off Blo...

Page 34: ...y to repair it Call a qualified service technician Force or attempted repair may result in a fire or explosion WARNING Danger of explosion Can cause injury or death Do not attempt to light manually Un...

Page 35: ...shes Ignition lockout from too many trials 4 Flashes Ignition lockout from too many flame losses within single call for heat 5 Flashes Control hardware fault detected C Limit Controls Limit controls a...

Page 36: ...ilter frame when reinstalling filters See figure 24 NOTE Filters must be U L C certified or equivalent for use in Canada B Lubrication All motors are lubricated at the factory No further lubrication i...

Page 37: ...ENTATION One and Two Stage Heat 150 000 BTUH 7 BURNERS 108 000 BTUH 5 BURNERS 65 000 BTUH 3 BURNERS SENSOR IGNITOR SENSOR IGNITOR SENSOR IGNITOR Clean combustion air inducer as follows 1 Shut off powe...

Page 38: ...ly during the cooling season Condenser coils are made of single and two formed slabs On units with two slabs dirt and debris may become trapped between the slabs To clean between slabs carefully separ...

Page 39: ...et See figure 30 Retain the screw to secure the back side of the ionizer bracket 2 Remove two screws securing the front side of the ionizer bracket and pull out of unit and clean brushes 3 Replace ion...

Page 40: ...blower access door 6 Allow 10 minutes before touching the lamps Then carefully remove the old lamp from the lamp holder clips 7 Wear cotton gloves or use a cotton cloth when handling the new lamp Plac...

Page 41: ...t office for proper disposal Do not use a vacuum cleaner Do not incinerate Maintenance For all maintenance contact a qualified HVAC technician Read the maintenance instructions before opening unit pan...

Page 42: ...I D must change To configure the option use MAIN MENU SETUP INSTALL menu path Press SAVE until CONFIGURATION ID 1 or 2 appears depending on the option installed Change the appropriate character in the...

Page 43: ...t Installed N Damper Position A A34 Pressure Sensor C 5 Network Module N Not Installed L LonTalk Lennox 6 Blower Variable Frequency Drive Bypass N Not Installed A Automatic Bypass M Manual Bypass U Un...

Page 44: ...lled 1 Air Flow Proving Switch S52 3 Overflow Switch S149 S179 4 Reserved Reserved for future use N 7 Zone Bypass Damper N Not Installed Y Installed FIGURE 36 10 Reserved N Not Installed Not Installed...

Page 45: ...voltage __________ Cooling Checks Compressor Rotation Ambient Temp ________Return Air Temp ________ Supply Air Temp ________ Compressor Amps Compressor Volts Pressures Condenser Fan Amps CC Heater Am...

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Lennox LHT/LDT024, Installation Instructions Manual

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