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Page 44

Blower Motor Performance

G51MP−24B−045 PERFORMANCE (Less Filter)

External

Static

Pressure

in. w.g.

Air Volume / Watts at Different Blower Speeds

High

Medium−

High

Medium−

Low

Low

cfm Watts cfm Watts cfm Watts cfm Watts

0.00

1125

425

900

360

745

295

690

265

0.10

1115

410

905

350

760

285

695

260

0.20

1090

395

895

335

755

280

685

255

0.30

1060

380

880

325

740

270

675

250

0.40

1020

365

860

315

720

260

665

240

0.50

970

345

835

300

700

255

640

230

0.60

920

335

795

290

665

240

600

220

0.70

860

315

730

270

620

230

565

215

0.80

760

295

665

250

560

215

510

200

0.90

675

275

585

230

495

200

465

175

G51MP−36B−045 PERFORMANCE (Less Filter)

External

Static

Pressure

in. w.g.

Air Volume / Watts at Different Blower Speeds

High

Medium−

High

Medium−

Low

Low

cfm Watts cfm Watts cfm Watts cfm Watts

0.00

1555

630

1410

585

1190

520

1030

435

0.10

1515

605

1385

555

1190

485

1020

415

0.20

1470

580

1345

520

1170

455

1010

400

0.30

1410

555

1310

495

1155

440

1000

385

0.40

1350

535

1250

465

1120

410

980

360

0.50

1290

505

1205

450

1080

390

950

345

0.60

1220

485

1145

420

1020

365

905

320

0.70

1145

460

1080

400

975

345

860

300

0.80

1050

425

985

365

870

320

785

285

0.90

945

410

900

345

825

305

730

270

NOTES − Air volume based on bottom return air. Actual air volume may vary on side return air applications.

G51MP−36B−070 PERFORMANCE (Less Filter)

External

Static

Pressure

in. w.g.

Air Volume / Watts at Different Blower Speeds

High

Medium−

High

Medium−

Low

Low

cfm Watts cfm Watts cfm Watts cfm Watts

0.00

1640

660

1415

575

1160

485

1005

410

0.10

1600

635

1395

550

1160

460

1000

385

0.20

1540

605

1370

525

1160

445

995

375

0.30

1495

580

1345

505

1145

425

990

365

0.40

1420

545

1275

480

1125

395

965

345

0.50

1360

525

1245

450

1080

375

945

325

0.60

1275

490

1165

410

1025

350

900

305

0.70

1170

465

1085

385

965

335

860

295

0.80

1080

440

1010

360

865

310

775

270

0.90

945

400

840

320

765

275

710

245

G51MP−36C−090 PERFORMANCE (Less Filter)

External

Static

Pressure

in. w.g.

Air Volume / Watts at Different Blower Speeds

High

Medium−

High

Medium−

Low

Low

cfm Watts cfm Watts cfm Watts cfm Watts

0.00

1630

745

1360

635

1125

540

975

440

0.10

1620

715

1365

610

1160

515

1000

430

0.20

1590

680

1365

580

1160

495

990

405

0.30

1550

655

1355

565

1170

475

985

395

0.40

1520

630

1330

545

1160

460

980

380

0.50

1465

605

1300

515

1140

440

960

360

0.60

1415

570

1250

490

1095

420

940

350

0.70

1350

545

1215

470

1065

400

905

335

0.80

1260

510

1140

440

1005

375

850

310

0.90

1165

475

1035

395

900

335

730

285

NOTES − Air volume based on bottom return air. Actual air volume may vary on side return air applications.

External

Static

Pressure

in. w.g.

G51MP−48C−090 PERFORMANCE (Less Filter)

Air Volume / Watts at Different Blower Speeds

High

Medium−

High

Medium−

Low

Low

cfm Watts cfm Watts cfm Watts cfm Watts

0.00

2180

930

1835

790

1520

630

1280

510

0.10

2135

885

1825

750

1510

610

1275

495

0.20

2085

840

1810

720

1505

580

1270

475

0.30

2030

800

1775

685

1500

565

1265

460

0.40

1940

760

1735

650

1480

535

1250

440

0.50

1865

725

1660

600

1430

505

1215

425

0.60

1740

670

1590

575

1380

475

1175

410

0.70

1645

640

1475

520

1290

450

1105

375

0.80

1540

600

1340

465

1175

405

1020

355

0.90

1335

540

1170

440

1070

375

950

330

G51MP−48C−110 PERFORMANCE (Less Filter)

External

Static

Pressure

in. w.g.

Air Volume / Watts at Different Blower Speeds

High

Medium−

High

Medium−

Low

Low

cfm Watts cfm Watts cfm Watts cfm Watts

0.00

2160

880

1880

755

1490

602

1235

485

0.10

2100

850

1855

730

1480

585

1230

475

0.20

2035

805

1815

690

1475

560

1225

460

0.30

1965

750

1755

650

1475

545

1220

445

0.40

1885

725

1715

625

1465

510

1215

430

0.50

1780

680

1630

580

1420

490

1150

400

0.60

1690

660

1550

550

1360

460

1110

380

0.70

1575

620

1410

505

1210

405

1035

350

0.80

1375

550

1230

450

1125

380

970

325

0.90

1225

520

1120

415

1050

365

885

310

Содержание G51MP

Страница 1: ...n 41 Other Unit Adjustments 43 Service 46 Planned Service 48 Repair Parts List 48 Troubleshooting 49 Ignition Control Board Diagnostic Codes 52 Vent Pipe Sizing Worksheet 53 Start Up Performance Check...

Страница 2: ...he optional RAB Return Air Base NOTE 60C and 60D size units installed in upflow applica tions that require air volumes over 1800 cfm 850 L s must have one of the following 1 Single side return air wit...

Страница 3: ...lokPlusTM HEAT EXCHANGER ASSEMBLY CONDENSER COIL CONTROL BOX DOOR INTERLOCK SWITCH COLD HEADER COLLECTOR BOX COMBUSTION AIR INDUCER BLOWER ACCESS DOOR BURNER ACCESS PANEL FLUE COLLAR COMBUSTION AIR PR...

Страница 4: ...deck in the heating compartment G51MP 60D 135 units are shipped with a 3 to 2 PVC re ducing elbow Canadian Installations Only Replace the provided 2 street elbow shipped with the G51MP 48C 110 and G5...

Страница 5: ...rrangement a damper or other means to control the flow of air must adequately prevent chilled air from entering the furnace If the damper is manually oper ated it must be equipped to prevent operation...

Страница 6: ...berglass wool is known to the State of Cal ifornia to cause cancer Fiberglass wool may also cause respiratory skin and eye irritation To reduce exposure to this substance or for further information co...

Страница 7: ...a door Though an area may appear to be un confined it might be necessary to bring in outdoor air for combustion if the structure does not provide enough air by infiltration If the furnace is located i...

Страница 8: ...ng of all equipment in the enclosure See figures 4 and 5 When communicat ing with the outdoors through horizontal ducts each open ing shall have a minimum free area of 1 square inch 645 mm2 per 2 000...

Страница 9: ...one rigid leg The rigid leg is equipped with a shipping bolt and a flat white plastic wash er rather than the rubber mounting grommet used with a flexible mounting leg The bolt and washer must be re m...

Страница 10: ...her combustible materials other than wood flooring FIGURE 8 Return Air Upflow Units Return air can be brought in through the bottom or either side of the furnace installed in an upflow application If...

Страница 11: ...th RAB Return Air Base 1 Both the unit return air opening and the base return air opening must be covered by a single plenum or IAQ cabinet Minimum unit side return air opening dimensions for units re...

Страница 12: ...k 0 Sides 0 Vent 0 Floor NC Front clearance in alcove installation must be 24 in 610 mm Maintain a minimum of 24 in 610 mm for front service access Allow proper clearances to accommodate condensate tr...

Страница 13: ...rnace over the plenum 6 Ensure that the seal between the furnace and plenum is adequate G51MP UNIT SUPPLY AIR PLENUM ADDITIVE BASE PROPERLY SIZED FLOOR OPENING FIGURE 14 Installation on Cooling Cabine...

Страница 14: ...front of unit 3 If unit is installed above finished space fabricate a drain pan fitted with a 1 2 inch or 3 4 inch N P T fitting 4 Using 3 8 inch rods and support frame kit ordered separately fabricat...

Страница 15: ...n figure 18 or install the furnace on a field fabri cated raised platform as shown in figure 19 The unit must be supported at both ends and beneath the blower deck to prevent sagging Unit Heater Disch...

Страница 16: ...ed on a platform make an airtight seal between the bottom of the furnace and the platform to ensure that the unit operates properly and safely Use fiberglass sealing strips caulking or equivalent seal...

Страница 17: ...r Dia X Length Outdoor Ex haust Accel erator Dia X Length 1 1 2 Concentric Kit 2 Con centric Kit 3 Con centric Kit 2 Wall Plate Kit 3 Wall Plate Kit 2 Wall Ring Kit 1 1 2 X 12 2 X 12 71M80 or 44W92 69...

Страница 18: ...cations which permit the use of several differ ent sizes of vent pipe a combination vent pipe may be used Contact Lennox Application Department for assis tance in sizing vent pipe in these application...

Страница 19: ...ION Fumes from PVC glue may ignite during system check Allow fumes to dissipate for at least 5 minutes before placing unit into operation 1 Measure and cut vent pipe to desired length 2 Debur and cham...

Страница 20: ...In upflow or downflow applications the reducing ell must be glued using transition solvent cement directly into the unit flue collar 1 Choose the appropriate side for venting in upflow or downflow pos...

Страница 21: ...e exhaust vent pipe operates under positive pres sure and must be completely sealed to prevent leak age of combustion products into the living space Intake Piping The G51MP furnace may be installed in...

Страница 22: ...on Shown 2 2 2 2 TRANSITION TRANSITION 2 2 1 2 3 OR 4 2 1 2 3 OR 4 Limit pipe length to 4 in 135 applications 2 2 24B 045 36B 045 36B 070 36C 090 48C 090 60C 090 48C 110 60C 110 60D 135 24B 045 36B 04...

Страница 23: ...arance of 3 76mm around the air intake opening The air intake opening with the protective screen should always be directed either downward or straight out Use 2 pipe and fittings only and make sure th...

Страница 24: ...n temperature is below 32 F 0 C exhaust piping should be insulated with 1 2 13mm Ar maflex or equivalent when run through unheated space Do not leave any surface area of exhaust pipe open to out side...

Страница 25: ...rance above paved sidewalk or paved driveway located on public property Clearance under veranda porch deck or balcony 12 Equal to or greater than soffit depth 3 feet 9m 12 3 feet 9m within a height 15...

Страница 26: ...ewalk or paved driveway located on public property Clearance under veranda porch deck or balcony 12 3 feet 9m 7 feet 2 1m 3 feet 9m within a height 15 feet 4 5m above the meter regulator assembly 3 fe...

Страница 27: ...3 FOAM INSULATION IN UNCONDITIONED SPACE SIZE TERMINATION PIPE PER TABLE 8 3 76 MAX 12 305 ABOVE AVERAGE SNOW ACCUMULATION 3 76 OR 2 51 PVC PROVIDE SUPPORT FOR INTAKE AND EXHAUST LINES 8 203 MIN Inche...

Страница 28: ...305 MAX for 2 51 8 203 MIN 1 2 13 FOAM INSULATION 1 2 13 FOAM INSULATION IN UNCONDITIONED SPACE PROVIDE SUPPORT FOR INTAKE AND EXHAUST LINES EVERY 36 914 OUTSIDE WALL Inches mm SIDE VIEW DIRECT VENT W...

Страница 29: ...ULATE TO FORM SEAL SHEET METAL TOP PLATE MINIMUM 12 305mm ABOVE ROOF OR AVERAGE SNOW ACCUMULATION SIZE TERMINATION PIPE PER TABLE 8 Details of Exhaust Piping Terminations for Non Direct Vent Applicati...

Страница 30: ...RMINATION PIPE PER TABLE 8 G51MP NON DIRECT VENT APPLICATION USING EXISTING CHIMNEY Condensate Piping This unit is designed for either right or left side exit of con densate piping in either upflow or...

Страница 31: ...1 8m kit no 26K68 24 ft 7 3m kit no 26K69 and 50 ft 15 2m kit no 26K70 CAUTION Do not use copper tubing or existing copper condensate lines for drain line 5 If unit will be started immediately upon co...

Страница 32: ...and field installed for gas leaks Use a leak detecting solution or other preferred means The furnace must be isolated from the gas supply system by closing its individual manual shut off valve during...

Страница 33: ...1 73 57 1 61 53 1 50 50 1 42 3 4 19 05 824 20 930 360 10 19 250 7 08 200 5 66 170 4 81 151 4 28 138 3 91 125 3 54 118 3 34 110 3 11 103 2 92 1 25 4 1 049 26 645 680 19 25 465 13 17 375 10 62 320 9 06...

Страница 34: ...can be turned off for servicing Before connecting the thermostat or the power wiring check to make sure the wires will be long enough for servicing at a later date Remove the blower access panel to c...

Страница 35: ...mostat terminal block which is lo cated on the control board Install the room thermostat according to the instruc tions provided with the thermostat See figure 51 for thermostat designations If the fu...

Страница 36: ...eating Speed 120VAC Unused Blower Not energized Continuous Low Blower Speed Accessory Terminal 120VAC Transformer 120VAC Input 120VAC Heat Only Accessory 120VAC 120 Volt Neutral Flame Sensor Heat Only...

Страница 37: ...Page 37 FIGURE 54 TYPICAL G51MP WIRING DIAGRAM...

Страница 38: ...should be primed with suffi cient water to ensure proper condensate drain opera tion BEFORE LIGHTING the unit smell all around the fur nace area for gas Be sure to smell next to the floor be cause so...

Страница 39: ...rmostat calls for heat combustion air inducer starts Combustion air pressure switch proves blower opera tion Switch is factory set and requires no adjustment After a 15 second prepurge the hot surface...

Страница 40: ...ove the threaded plug from the outlet side of the gas valve and install a field provided barbed fitting Connect test gauge connection to barbed fitting to measure manifold pressure 2 Tee into the gas...

Страница 41: ...izes 10 0 10 0 10 0 10 0 10 0 Conversion kit required for applications at altitudes above 7501 ft above sea level Conversion kit required for applications at all altitudes NOTE A natural to L P propan...

Страница 42: ...y inspect the venting system for proper size and horizontal pitch Determine there is no blockage or re striction leakage corrosion or other deficiencies which could cause an unsafe condition 3 To the...

Страница 43: ...onds See figure 53 Thermostat Heat Anticipation Set the heat anticipator setting if adjustable according to the amp draw listed on the wiring diagram that is attached to the unit Electrical 1 Check al...

Страница 44: ...965 335 860 295 0 80 1080 440 1010 360 865 310 775 270 0 90 945 400 840 320 765 275 710 245 G51MP 36C 090 PERFORMANCE Less Filter External Static Pressure in w g Air Volume Watts at Different Blower...

Страница 45: ...10 1090 2055 935 1620 710 2625 1350 2310 1080 1885 885 1515 700 0 10 2665 1355 2385 1075 2025 885 1730 735 2570 1330 2325 1060 1910 865 1575 700 0 20 2585 1315 2350 1015 2030 865 1680 690 2410 1305 22...

Страница 46: ...ger If cleaning the heat exchanger becomes necessary follow the below procedures and refer to figure 1 when disassem bling unit Use papers or protective covering in front of fur nace while removing he...

Страница 47: ...mps 35 Reinstall burner box assembly in vestibule area 36 Reconnect flame roll out switch wires 37 Reconnect sensor wire and reconnect 2 pin plug from ignitor 38 Secure burner box assembly to vestibul...

Страница 48: ...mporarily shut down the furnace until the items can be repaired or replaced Instruct the homeowners to pay attention to their furnace Situations can arise between annual furnace in spections that may...

Страница 49: ...LOUT SWITCH CLOSES GAS VALVE OFF COMBUSTION AIR INDUCER ON INDOOR BLOWER ON HEATING SPEED DS1 SLOW FLASH DS2 OFF GAS VALVE OFF COMBUSTION AIR INDUCER OFF INDOOR BLOWER OFF WITH DELAY DS1 OFF DS2 SLOW...

Страница 50: ...AL FOR IGNITION GAS VALVE OPENS IGNITOR ENERGIZED FOR UP TO 4 SECONDS YES FLAME STABILIZATION PERIOD GAS VALVE OFF COMBUSTION AIR INDUCER ON INDOOR BLOWER OFF HAS CONTROL FAILED TO SENSE FLAME FOR FIV...

Страница 51: ...ONTINUOUSLY ARE ROLLOUT SWITCHES CLOSED DS1 DS2 SLOW FLASH RATE REMAINS UNCHANGED THROUGHOUT COOLING CYCLE THERMOSTAT CALLS FOR COOLING COMPRESSOR CONTACTOR AND SYSTEM FAN ENERGIZED WITH 2 SECOND DELA...

Страница 52: ...ring cooling and continuous fan SIMULTANEOUS FAST FLASH SIMULTANEOUS FAST FLASH Normal operation Signaled when heating demand initiated at thermostat SLOW FLASH ON Primary or secondary limit switch op...

Страница 53: ...ved NOTE In Direct Vent systems total the equivalent length of either the exhaust OR intake piping run depending upon which will be LONGER Intake and exhaust pipe diameter must be the same size and mu...

Страница 54: ...eight 8 feet above grade di rectly in line with the exhaust vent terminal for the hori zontally vented gas fueled heating appliance or equipment The sign shall read in print size no less than one half...

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