Energy Tech Laboratories MR212 Installation, Operation And Maintenance Manual Download Page 15

15                                                                                                             

Pulley Combination Chart 

Motor RPM

1725

1/3 to 1-1/2 HP

MOTOR PULLEY

Dd1

Dd2

Pd1

Pd2

AX BELTS

1VL34

1.9

2.9

2

3

Open

Closed

BLOWER PULLEY

DATUM DIAMETER

PITCH DIAMETER

5

4 1/2

4

3 1/2

3

2 1/2

2

1 1/2

1

1/2

0

AK114

11

11.2

308

323

339

354

370

385

400

416

431

447

462

1/3 to 2 HP

MOTOR PULLEY

Dd1

Dd2

Pd1

Pd2

AX BELTS

1VL40

2.4

3.4

2.6

3.6

Open

Closed

BLOWER PULLEY

DATUM DIAMETER

PITCH DIAMETER

5

4 1/2

4

3 1/2

3

2 1/2

2

1 1/2

1

1/2

0

AK114

11

11.2

400

416

431

447

462

477

493

508

524

539

554

AK94

9

9.2

488

506

525

544

563

581

600

619

638

656

675

AK79

7.5

7.7

582

605

627

650

672

694

717

739

762

784

806

AK66

6.2

6.4

701

728

755

782

809

836

863

889

916

943

970

AK54

5

5.2

863

896

929

962

995

1028

1062

1095

1128

1161

1194

AK46

4.2

4.4

1019

1059

1098

1137

1176

1215

1255

1294

1333

1372

1411

AK39

3.5

3.7

1212

1259

1305

1352

1399

1445

1492

1539

1585

1632

1678

AK32

3

3.2

1402

1455

1509

1563

1617

1671

1725

1779

1833

1887

1941

3 to 5 HP

MOTOR PULLEY

Dd1

Dd2

Pd1

Pd2

BX BELTS

2VP42

2.9

3.9

3

4

Open

Closed

BLOWER PULLEY

DATUM DIAMETER

PITCH DIAMETER

6

5 1/2

5

4 1/2

4

3 1/2

3

2 1/2

2

1 1/2

1

1/2

0

2BK160H

15.4

15.7

330

339

348

357

366

375

385

394

403

412

421

430

439

2BK140H

13.4

13.7

378

388

399

409

420

430

441

451

462

472

483

493

504

2BK120H

11.4

11.7

442

455

467

479

491

504

516

528

541

553

565

577

590

2BK110H

10.4

10.7

484

497

511

524

537

551

564

578

591

605

618

631

645

2BK100H

9.4

9.7

534

548

563

578

593

608

622

637

652

667

682

697

711

2BK90H

8.4

8.7

595

611

628

644

661

677

694

710

727

744

760

777

793

2BK80H

7.4

7.7

672

691

709

728

747

765

784

803

821

840

859

877

896

2BK70H

6.4

6.7

772

794

815

837

858

880

901

923

944

965

987

1008

1030

2BK60H

5.4

5.7

908

933

958

984

1009

1034

1059

1084

1110

1135

1160

1185

1211

2BK55H

4.9

5.2

995

1023

1050

1078

1106

1133

1161

1189

1216

1244

1272

1299

1327

2BK50H

4.4

4.7

1101

1132

1162

1193

1223

1254

1285

1315

1346

1376

1407

1438

1468

7-1/2 to 10 HP

MOTOR PULLEY

Dd1

Dd2

Pd1

Pd2

BX BELTS

2VP60

4.3

5.5

4.7

5.9

Open

Closed

BLOWER PULLEY

DATUM DIAMETER

PITCH DIAMETER

6

5 1/2

5

4 1/2

4

3 1/2

3

2 1/2

2

1 1/2

1

1/2

0

2BK160H

15.4

15.7

516

527

538

549

560

571

582

593

604

615

626

637

648

2BK140H

13.4

13.7

592

604

617

630

642

655

667

680

693

705

718

730

743

2BK120H

11.4

11.7

693

708

722

737

752

767

781

796

811

826

840

855

870

2BK110H

10.4

10.7

758

774

790

806

822

838

854

871

887

903

919

935

951

2BK100H

9.4

9.7

836

854

871

889

907

925

943

960

978

996

1014

1031

1049

2BK90H

8.4

8.7

932

952

972

991

1011

1031

1051

1071

1091

1110

1130

1150

1170

2BK80H

7.4

7.7

1053

1075

1098

1120

1143

1165

1187

1210

1232

1255

1277

1299

1322

3 to 5 HP

MOTOR PULLEY

Dd1

Dd2

Pd1

Pd2

BX BELTS

2VP42

2.9

3.9

3

4

Open

Closed

BLOWER PULLEY

DATUM DIAMETER

PITCH DIAMETER

6

5 1/2

5

4 1/2

4

3 1/2

3

2 1/2

2

1 1/2

1

1/2

0

2B5V278

27.8

28.1

184

189

194

200

205

210

215

220

225

230

235

240

246

2B5V250

25

25.3

205

210

216

222

227

233

239

244

250

256

261

267

273

2B5V234

23.4

23.7

218

224

230

237

243

249

255

261

267

273

279

285

291

2B5V200

20

20.3

255

262

269

276

283

290

297

304

312

319

326

333

340

2B5V184

18.4

18.7

277

284

292

300

307

315

323

331

338

346

354

361

369

2B5V160

16

16.3

317

326

335

344

353

362

370

379

388

397

406

414

423

2B5V154

15.4

15.7

330

339

348

357

366

375

385

394

403

412

421

430

439

2B5V136

12.6

12.9

401

412

423

435

446

457

468

479

490

501

513

524

535

2B5V124

12.4

12.7

407

419

430

441

453

464

475

487

498

509

521

532

543

2B5V110

11

11.3

458

471

483

496

509

522

534

547

560

572

585

598

611

7-1/2 to 10 HP

MOTOR PULLEY

Dd1

Dd2

Pd1

Pd2

BX BELTS

2VP60

4.3

5.5

4.7

5.9

Open

Closed

BLOWER PULLEY

DATUM DIAMETER

PITCH DIAMETER

6

5 1/2

5

4 1/2

4

3 1/2

3

2 1/2

2

1 1/2

1

1/2

0

2B5V278

27.8

28.1

289

295

301

307

313

319

325

331

338

344

350

356

362

2B5V250

25

25.3

320

327

334

341

348

355

361

368

375

382

389

395

402

2B5V234

23.4

23.7

342

349

357

364

371

378

386

393

400

408

415

422

429

2B5V200

20

20.3

399

408

416

425

433

442

450

459

467

476

484

493

501

2B5V184

18.4

18.7

434

443

452

461

470

480

489

498

507

517

526

535

544

2B5V160

16

16.3

497

508

519

529

540

550

561

571

582

593

603

614

624

2B5V154

15.4

15.7

516

527

538

549

560

571

582

593

604

615

626

637

648

2B5V136

12.6

12.9

628

642

655

669

682

695

709

722

735

749

762

776

789

2B5V124

12.4

12.7

638

652

666

679

693

706

720

733

747

761

774

788

801

2B5V110

11

11.3

717

733

748

763

779

794

809

824

840

855

870

885

901

15 to 20 HP

MOTOR PULLEY

Dd1

Dd2

Pd1

Pd2

BX BELTS

2VP75

5.8

7

6.2

7.4

Open

Closed

BLOWER PULLEY

DATUM DIAMETER

PITCH DIAMETER

6

5 1/2

5

4 1/2

4

3 1/2

3

2 1/2

2

1 1/2

1

1/2

0

2B5V278

27.8

28.1

381

387

393

399

405

411

417

424

430

436

442

448

454

2B5V250

25

25.3

423

430

436

443

450

457

464

470

477

484

491

498

505

2B5V234

23.4

23.7

451

459

466

473

480

488

495

502

509

517

524

531

539

2B5V200

20

20.3

527

535

544

552

561

569

578

586

595

603

612

620

629

2B5V184

18.4

18.7

572

581

590

600

609

618

627

636

646

655

664

673

683

2B5V160

16

16.3

656

667

677

688

698

709

720

730

741

751

762

773

783

2B5V154

15.4

15.7

681

692

703

714

725

736

747

758

769

780

791

802

813

2B5V136

12.6

12.9

829

842

856

869

883

896

909

923

936

949

963

976

990

** 2HP Motors on 20 IN Blowers use 2VP42 Pulleys

TURNS ON MOTOR PULLEY

10 

- 20

 IN

. B

LOW

E

R

*

*

TURNS ON MOTOR PULLEY

TURNS ON MOTOR PULLEY

TURNS ON MOTOR PULLEY

TURNS ON MOTOR PULLEY

25

 IN. B

LOW

ER

TURNS ON MOTOR PULLEY

TURNS ON MOTOR PULLEY

 

Summary of Contents for MR212

Page 1: ...D INSPECTION Upon receiving unit check for any interior and exterior damage and if found report it immediately to the carrier Also check that all accessory items are accounted for and are damage free Turn the blower wheel by hand to verify free rotation and check the damper if supplied for free operation WARNING Improper installation adjustment alteration service or maintenance can cause property ...

Page 2: ......

Page 3: ...tart Up Procedure 14 Pulley Adjustment 14 Pulley Alignment 14 Proper Belt Tension 14 Pulley Combination Chart 15 Sequence of Operation 16 Flame Safety Control 16 Air Flow Switch 16 Modulating Gas System 17 High Temperature Limit 17 Operation Summary 17 Optional Remote Panel Circuit 18 Components 19 Remote Panel Option 20 Troubleshooting 21 Airflow Troubleshooting Chart 21 Burner Troubleshooting Ch...

Page 4: ...capacity 5 The invoice is not paid within the terms of the sales agreement The MANUFACTURER shall not be liable for incidental and consequential losses and damages potentially attributable to malfunctioning equipment Should any part of the equipment prove to be defective in material or workmanship within the 12 month warranty period upon examination by the MANUFACTURER such part will be repaired o...

Page 5: ...following procedure to assemble the intake to the heater 1 Apply silicone or weather proof gasket on the back side of the flanges of the intake hood or v bank intake 2 Screw the flanges of the intake hood or v bank to the unit with the supplied sheet metal screws If the unit is a modular unit with a v bank or evaporative cooler section the v bank or evaporative cooler will bolt to the heater with ...

Page 6: ...hods the structure s designed infiltration rate by providing properly sized relief openings or by interlocking a powered exhaust system or by a combination of these methods Heaters installed with intake ductwork must be purged to replace at least four air changes of the volume of the intake duct If the failure or malfunction of this heater creates a hazard to other fuel burning equipment in the bu...

Page 7: ...and the blower module 3 Support and level the end of the heat module end opposite the blower with the provided equipment legs rails 4 Attach the filter hood to the intake side of the heater module 5 Drill a hole in the discharge of the blower large enough to insert the Maxitrol mixing tube and discharge sensor if provided Install the Maxitrol mixing tube in the proper airflow direction The airflow...

Page 8: ...es 4 Install a ground joint union with brass seat and a manual shut off valve external to the unit casing as shown below adjacent to the unit for emergency shut off and easy servicing of controls 5 Provide a sediment trap as shown below before each unit and where low spots in the pipe line cannot be avoided 6 Blow out the gas line to remove debris before making connections Purge line to remove air...

Page 9: ...to Building Wiring Connection 4 Make certain that the power source is compatible with the requirements of your equipment The heater nameplate identifies the proper phase and voltage of the motor 5 Units shipped with an optional remote panel have two electrical circuit drops It is important to run the motor wires in a separate conduit from the remote control wiring The DC wires from the unit temper...

Page 10: ...heater There is a terminal strip inside the remote panel that matches the terminals in the heater unit The remote panel should be wired as shown below BL YW RD BK PK RD WH OR BR GY BK RD YW PK RD BK WH BK OR BR GY PK RD BK YW RD OR BR GY WH BK 1 E PK YW BK RD WH GY BR OR RD NC BK Fire System Microswitch BK NO PR C Fan to Building Wiring Connection ...

Page 11: ...For 3 phase motors any two power leads can be interchanged to reverse motor direction 7 When the fan is started up observe the operation and check for any unusual noises Pilot Adjustment 1 Restart the fan and check the gas supply pressure at the inlet gas tap upstream of all electronic valves The inlet pressure should be 7 in 14 in w c 7 in w c 5 psi on Size 4 5 heaters If the inlet pressure is to...

Page 12: ...the combination gas valve regulator adjustment size 1 3 or the cap from the MR212 valve size 4 5 Using the regulator pressure adjusting screw adjust the high fire manifold pressure to 5 in w c maximum for natural gas and 2 5 in w c maximum for propane gas High fire should be set to generate the desired temperature rise If the high fire screw is at the end of its adjustment and more pressure is nee...

Page 13: ...Maxitrol 44 This will drive the valve into its full open position Adjust high fire with the regulator inside the unit Turn clockwise to increase temperature rise Ensure that DC flame signal is minimum 12 VDC Replace the wires on the Maxitrol Amplifier Adjusting low fire Remove wire 5 from the Maxitrol 14 amplifier 8 for Maxitrol 44 This will drive the valve into its lowest position Adjust the low ...

Page 14: ... not set fan RPMs higher than specified in the maximum RPM chart See the troubleshooting guide for more information 3 Measure and record the voltage and amperage to the motor and compare with the motor nameplate to determine if the motor is operating under safe load condition 4 Once the rpm of the ventilator has been properly set disconnect power and recheck belt tension and pulley alignment as de...

Page 15: ... 1165 1187 1210 1232 1255 1277 1299 1322 3 to 5 HP MOTOR PULLEY Dd1 Dd2 Pd1 Pd2 BX BELTS 2VP42 2 9 3 9 3 4 Open Closed BLOWER PULLEY DATUM DIAMETER PITCH DIAMETER 6 5 1 2 5 4 1 2 4 3 1 2 3 2 1 2 2 1 1 2 1 1 2 0 2B5V278 27 8 28 1 184 189 194 200 205 210 215 220 225 230 235 240 246 2B5V250 25 25 3 205 210 216 222 227 233 239 244 250 256 261 267 273 2B5V234 23 4 23 7 218 224 230 237 243 249 255 261 2...

Page 16: ...rd the unit will pause to purge any gasses or combustible vapors before attempting flame ignition Then there is a Pilot Trial For Ignition PTFI and the PTFI LED comes on During PTFI the FSC opens the pilot gas valve and allows gas to flow to the pilot assembly At the same moment the spark igniter is started causing the spark to ignite the pilot gas When the flamerod sensor detects the flame it tur...

Page 17: ...as system consists of a temperature selector dial a discharge air sensor an amplifier and a modulating gas valve The two types of Maxitrol systems used are the Maxitrol 14 series or the Maxitrol 44 series The Maxitrol 14 utilizes a discharge air sensor and modulates the Maxitrol gas valve to provide discharge air to match the selected temperature on the temperature selector The Maxitrol 44 utilize...

Page 18: ...itch Nothing Happens No Power is Sent to Heater Power is Sent to Heater to Open Damper if provided and Start Blower Off Position 3 Position Panels Only Manual Blower On Light Damper is not Open or Freeze Stat has Detected Low Temperature Operation On Off Temperature Control Switch Blower Operates Heat Does not Operate Vent Position Heat Position Heat Circuit is Energized Burner On Light Illuminate...

Page 19: ...sed to provide 120V service to controls 11 Circuit Breaker Protects electrical components from high current spikes 12 Terminal Strip Central location to terminate control wiring Should be used for troubleshooting 13 Control Transformer 120V primary 24V secondary control transformer 14 Low Pressure Airflow Probe Measures profile pressure downstream of burner 15 High Pressure Airflow Probe Measures ...

Page 20: ...t Vent Switch This switch is powered when the Manual Off Auto switch is in the MANUAL position It is used to control the tempering mode of the unit The VENT position will prevent the burner from operating and the heater will deliver untempered air The HEAT position will force the burner on and the unit will heat the incoming air This switch becomes a Heat Vent Cool switch when the cooling interloc...

Page 21: ...o low Determine if HP is sufficient for job Duct static pressure lower than design Reduce fan RPM Insufficient Airflow Fan rotating in the wrong direction Be sure fan is rotating in the direction shown on rotation label Poor outlet conditions There should be a straight clear duct at the outlet Intake damper not fully open Inspect damper linkage and replace damper motor if needed Duct static pressu...

Page 22: ...Check wiring to valve Defective pilot sensor Replace pilot sensor Shut off valve closed Open shut off valve Defective flame safety controller Replace flame safety controller Pilot fails as main gas valves open and main gas begins to flow Plug the first burner port next to the pilot gas tube with burner cement Not Enough Heat Main gas pressure too low Increase main gas pressure do not exceed 14 in ...

Page 23: ... Panels Only Heat Vent Switch in Vent Position Gas Pressure Switch Tripped option High Temperature Limit Thermostat Tripped Manual Off Auto Switch in Auto Position and Intake Air Thermostat not Satisfied Improper Airflow Insufficient Airflow Excessive Airflow Bad airflow switch Problem with air probes Problem with airflow tubing Broken Belt POWER Light and BLOWER ON Light and BURNER ON Light Prope...

Page 24: ...ifier is there 9 5K to 11K Ohms between the wires Replace Discharge Air Sensor Remove Terminal 4 from the Maxitrol Amplifier Does the heater go into High Fire Replace Amplifier With wires 1 2 removed from the Maxitrol Amplifier is there 9 5K to 11K Ohms between the wires Replace the Temperature Selector Is there a short or open circuit in Modulating Valve Should be 45 55 Ohms 60 80 on MR212 Replac...

Page 25: ...injury 3 All fasteners should be checked for tightness each time maintenance checks are preformed prior to restarting unit 4 Blowers require very little attention when moving clean air Occasionally oil and dust may accumulate causing imbalance If the fan is installed in a corrosive or dirty atmosphere periodically inspect and clean the wheel inlet and other moving parts to ensure smooth and safe o...

Page 26: ...d be checked for tightness each time maintenance checks are preformed prior to restarting unit Every 3 months 1 Belt tension should be checked quarterly See instructions in the previous maintenance section Over tightening will cause excessive bearing wear and noise Too little tension will cause slippage at startup and uneven wear 2 Filters need to be cleaned and or replaced quarterly and more ofte...

Page 27: ...27 ...

Page 28: ...e Serial Number Motor Amperage Motor Volts RPM Motor Hertz Burner Differential Pressure in w c Motor Phase Pilot Flame Signal VDC Motor FLA Low Fire Flame Signal VDC Motor HP High Fire Flame Signal VDC Blower Pulley Gas Type Motor Pulley High Fire Inlet Gas Pressure in w c Belt Number Low Fire Manifold Gas Pressure in w c Gas Type High Fire Manifold Gas Pressure in w c Min Btu Hr Thermostat Set Po...

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