Lennox LHT/LDT024 Installation Instructions Manual Download Page 17

Page: 17 / 45

Page 16

Page 17

BLOWER DA

1.0 HP

| 3 ROW (048)

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

111

124

488

1344

200

572

1573

276

655

1747

377

724

1920

477

792

2041

581

844

2161

684

896

2304

852

964

2354

936

992

0.1

1012

101

536

1253

181

614

1493

261

691

1677

366

755

1860

471

819

1990

578

868

685

916

2277

860

980

2339

951

1006

0.2

926

584

1177

172

656

1427

256

728

1619

365

788

181

473

848

1949

583

894

2086

693

939

2256

873

999

2328

969

1024

0.3

854

634

111

173

701

1372

260

767

1572

371

823

1772

482

878

1916

595

921

2059

707

963

2240

891

1019

2319

991

1043

0.4

794

684

1061

181

746

1328

270

807

1535

383

859

1741

496

910

1890

611

950

2038

725

989

2226

913

1042

231

1014

1065

0.5

745

104

734

1019

195

791

1292

286

847

1504

401

895

1715

515

942

1868

631

979

2020

747

1016

2214

936

1066

2301

1039

1089

0.6

704

122

785

983

215

837

1262

307

888

1478

423

932

1693

538

976

1849

654

101

2004

770

1045

2201

960

1092

2288

1063

111

0.7

671

145

836

954

238

883

1237

331

929

1456

447

969

1674

562

1009

1831

678

1041

1988

794

1073

2185

983

111

2270

1085

1140

0.8

643

171

886

929

264

928

1215

357

969

1435

472

1006

1655

587

1043

1813

703

1073

1970

818

1103

2164

1005

1145

2246

1104

1168

0.9

619

199

935

907

291

973

1194

383

1010

1415

498

1043

1635

612

1076

1792

726

1104

1948

840

1132

2138

1024

1173

2212

111

1196

1.0

596

228

983

884

319

1016

1172

410

1049

1392

523

1079

1612

635

1109

1766

747

1135

1920

859

1161

2104

1038

1200

- - -

1.1

- - -

1148

434

1087

1366

545

111

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

1841

883

1217

2004

1050

1254

- - -

1.3

- - -

1085

474

1159

1295

578

1181

1505

681

1202

1646

784

1223

1786

886

1244

1935

1044

1280

- - -

1.4

- - -

1043

486

1192

1247

586

121

1451

685

1230

1585

783

1250

1718

881

1269

1851

1029

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

1087

111

493

1304

184

579

1520

257

665

1689

368

738

1857

478

810

1972

588

864

2087

698

918

2196

844

975

2283

925

1000

0.1

1021

104

537

1246

180

618

1470

255

699

1646

368

768

1821

480

837

1941

592

888

2061

704

938

2179

852

992

2255

926

1017

0.2

961

102

582

1193

181

658

1425

259

734

1607

373

799

1789

487

864

1914

601

912

2039

714

960

2163

864

1012

2231

932

1034

0.3

906

106

628

1145

186

699

1384

266

769

1572

382

831

1759

498

892

1889

613

938

2018

728

984

2149

879

1033

2209

941

1053

0.4

855

674

1101

196

740

1347

278

806

1540

396

864

1732

513

921

1866

629

965

1999

744

1008

2134

896

1054

- - -

0.5

808

125

720

1060

209

781

1312

293

842

1509

412

896

1706

530

950

1843

646

992

1980

762

1033

915

1077

- - -

0.6

764

139

766

1022

225

823

1279

310

879

1481

430

930

1682

549

980

1821

666

1019

1960

782

1058

2102

935

1101

- - -

0.7

722

155

812

985

242

864

1247

328

916

1452

449

964

1657

569

101

1799

686

1048

1940

803

1084

2084

955

1125

- - -

0.8

682

172

858

949

260

906

1216

348

953

1424

469

997

1632

589

1041

1776

706

1076

1919

823

1111

2063

974

1150

- - -

0.9

643

191

903

914

279

946

1185

367

989

1396

489

1030

1606

610

1071

1751

727

1104

1895

843

1137

2039

992

1175

- - -

1.0

- - -

1153

386

1024

1366

508

1062

1579

629

1100

1724

745

1132

1869

861

1163

201

1008

1201

- - -

1.1

- - -

1120

404

1059

1334

525

1095

1548

646

1130

1694

761

1160

1839

876

1189

1979

1021

1226

- - -

1.2

- - -

1085

420

1093

1300

541

1126

1515

661

1158

1660

775

1186

1805

889

1214

1941

1031

1250

- - -

1.3

- - -

1047

433

1126

1263

553

1156

1478

672

1186

1622

785

1213

1766

898

1239

1897

1037

1275

- - -

1.4

- - -

1005

442

1158

1221

561

1185

1436

680

1212

1579

792

1238

1721

903

1263

1847

1037

1298

- - -

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...

Search results

Summary of Contents for LHT/LDT024

Reviews:

Related manuals for LHT/LDT024

Brands by name

Popular brands

Lennox LHT/LDT024, Installation Instructions Manual

Search results

Summary of Contents for LHT/LDT024

Reviews:

Related manuals for LHT/LDT024

Brands by name

Popular brands