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   21

Service Facts

M952-SF-4

M952V100CD48AB - FURNACE HEATING AIRFLOW (CFM) AND POWER (WATTS) VS. EXTERNAL STATIC PRESSURE WITH FILTER

1st STAGE CAPACITY =

2nd STAGE CAPACITY =

63,000

96,000

AIRFLOW

SETTING

DIP SWITCH SETTING

EXTERNAL STATIC PRESSURE

SW 7

SW 8

0.1

0.3

0.5

0.7

0.9

HEATING

1ST

STAGE

LOW

ON

ON

CFM

TEMP. RISE

WATTS

923

61

110

955

59

165

960

58

210

958

58

265

947

59

310

MEDIUM LOW

OFF

ON

CFM

TEMP. RISE

WATTS

1020

55

145

1047

53

190

1053

53

250

1042

54

295

1029

54

350

MEDIUM **

ON

OFF

CFM

TEMP. RISE

WATTS

1156

48

185

1166

48

240

1172

48

300

1177

48

350

1178

48

420

HIGH

OFF

OFF

CFM

TEMP. RISE

WATTS

1275

44

225

1305

43

290

1328

42

365

1328

42

445

1328

42

510

HEATING

2ND

STAGE

LOW

ON

ON

CFM

TEMP. RISE

WATTS

1298

66

235

1320

65

305

1335

65

380

1343

64

445

1343

64

520

MEDIUM LOW

OFF

ON

CFM

TEMP. RISE

WATTS

1439

60

310

1459

59

390

1482

58

470

1483

58

550

1470

59

610

MEDIUM **

ON

OFF

CFM

TEMP. RISE

WATTS

1639

53

430

1650

52

525

1650

52

600

1644

52

680

1496

58

640

HIGH

OFF

OFF

CFM

TEMP. RISE

WATTS

1790

18

570

1818

47

670

1813

47

770

1708

50

750

1535

56

675

  ** Factory setting

  *** Above MAX temperature change

M952V100CD48AB - FURNACE COOLING AIRFLOW (CFM) AND POWER (WATTS) VS. EXTERNAL STATIC PRESSURE WITH FILTER

OUTDOOR

UNIT SIZE

(TONS)

AIRFLOW

SETTING

DIP SWITCH SETTING

EXTERNAL STATIC PRESSURE

SW 1

SW 2

SW 3

SW 4

0.1

0.3

0.5

0.7

0.9

2.5

LOW

(350 CFM/TON)

ON

ON

OFF

ON

CFM

WATTS

870
100

885
140

887
185

881
230

876
270

NORMAL

(400 CFM/TON)

ON

ON

OFF

OFF

CFM

WATTS

989
120

1018

180

1016

230

1012

285

999
325

HIGH

(450 CFM/TON)

ON

ON

ON

OFF

CFM

WATTS

1124

175

1139

225

1130

275

1135

335

1135

390

3.0

LOW

(350 CFM/TON)

OFF

ON

OFF

ON

CFM

WATTS

1053

145

1075

200

1070

245

1070

295

1049

350

NORMAL

(400 CFM/TON)

OFF

ON

OFF

OFF

CFM

WATTS

1186

195

1205

255

1220

310

1220

370

1216

440

HIGH

(450 CFM/TON)

OFF

ON

ON

OFF

CFM

WATTS

1336

255

1366

340

1383

405

1385

470

1381

545

3.5

LOW

(350 CFM/TON)

ON

OFF

OFF

ON

CFM

WATTS

1216

190

1225

255

1235

320

1240

385

1243

445

NORMAL

(400 CFM/TON)

ON

OFF

OFF

OFF

CFM

WATTS

1394

270

1422

360

1436

430

1437

505

1430

580

HIGH

(450 CFM/TON)

ON

OFF

ON

OFF

CFM

WATTS

1579

395

1604

475

1610

555

1599

645

1517

640

4.0

LOW

(350 CFM/TON)

OFF

OFF

OFF

ON

CFM

WATTS

1377

270

1412

355

1426

430

1433

510

1428

575

NORMAL

(400 CFM/TON)

OFF

OFF

OFF

OFF

CFM

WATTS

1599

425

1624

510

1636

585

1618

670

1512

635

HIGH

(450 CFM/TON)

OFF

OFF

ON

OFF

CFM

WATTS

1801

580

1818

690

1815

775

1694

735

1525

660

  1. At continuous fan setting: Heating or Cooling airflows are approximately 50% of selected cooling value.
  2. LOW airflow (350 cfm/ton) is COMFORT & HUMID CLIMATE setting; 
     NORMAL airflow (400 cfm/ton) is typical setting;
     HIGH airflow (450 cfm/ton) is DRY CLIMATE setting.

Summary of Contents for M952V060BD36AB

Page 1: ...CT 10 x 8 1 Variable See Fan Performance Table 1 2 Variable 115 1 60 7 7 Centrifugal Direct Variable 1 50 5000 33 110 3 60 180 1 0 Yes High Velocity 1 17x25 1 in 2 Round Aluminized Steel Type I 20 3 4...

Page 2: ...pe I 20 6 45 6 56 Redundant Two Stage Hot Surface Igniter Multiport Inshot 6 115 1 60 17 2 20 1 2 H x W x D 41 3 4 x 26 1 2 x 30 1 2 206 196 M952V060BD36AB 6 Downflow Horizontal 39 000 38 000 60 000 5...

Page 3: ...ons of use WARNING SAFETY SECTION WARNING ELECTRIC SHOCK HAZARD THE CABINET MUST HAVE AN UNINTERRUPTED OR UNBROKEN GROUND ACCORDING TO NATIONAL ELEC TRICAL CODE ANSI NFPA 70 LATEST EDITION AND CANADIA...

Page 4: ...sh eyes with water to remove dust If symptoms persist seek medical attention Skin Contact Wash affected areas gently with soap and warm water after handling SEQUENCE OF OPERATION COMFORT CONTROL CALL...

Page 5: ...otor is reduced to low speed 1st stage satisfied W1 Comfort Control contacts open signaling that 1st Stage heating requirements are satisfied The Gas Valve will close and the induced draft blower will...

Page 6: ...remely hot 4 IGNITER This unit has a hot surface direct ignition device that automatically lights the burners Please note that it is very fragile and should be handled with care 5 BURNER Gas burners d...

Page 7: ...7 Service Facts M952 SF 4 M952 WIRING DIAGRAM From drawing D345191P01...

Page 8: ...8 Service Facts M952 SF 4 M952 SCHEMATIC DIAGRAM2 From drawing D345191P01...

Page 9: ...9 Service Facts M952 SF 4 M952 WIRING DIAGRAM From drawing D345192...

Page 10: ...10 Service Facts M952 SF 4 M952 SCHEMATIC DIAGRAM From drawing D345192...

Page 11: ...otor Will Not Run ECM 2 TM QUICK CHECK Blower Motor Will Not Run 1 Jumper 24 Volt A C R Terminal to G terminal on the Low Voltage T erminal board Does motor run NO Go to step 2 YES Motor runs check Co...

Page 12: ...to motor low voltage plug pins 12 and 15 and pins 1 and 3 which are common Does motor run NO Go to step 4 YES Fault is in the 16 wire low voltage harness Repair or replace it 4 Is the line voltage to...

Page 13: ...D on the board should be on 6 If the troubleshooter R L E D is not on check for 24 volts A C at the motor control board 7 If 24 volts A C is not present troubleshoot and repair as needed 8 If 24 volt...

Page 14: ...s bad repair or replace Low Voltage Comfort Control Operation 14 Verify thermostat signals by jumping R to each of the low voltage terminal connections as follows BK O YLO G W1 W2 W3 See exceptions be...

Page 15: ...30 HIGH 450 CFM TON OFF OFF ON OFF CFM WATTS 1325 360 1325 425 1300 460 1175 425 1000 365 1 At continuous fan setting Heating or Cooling airflows are approximately 50 of selected cooling value 2 LOW a...

Page 16: ...LOW SETTING DIP SWITCH SETTING EXTERNAL STATIC PRESSURE SW 1 SW 2 SW 3 SW 4 0 1 0 3 0 5 0 7 0 9 2 0 LOW 350 CFM TON ON ON OFF ON CFM WATTS 750 84 750 122 750 154 720 185 710 221 NORMAL 400 CFM TON ON...

Page 17: ...7 650 1449 595 HIGH 450 CFM TON OFF OFF ON OFF CFM WATTS 1847 630 1863 735 1816 780 1687 720 1532 665 1 At Continuous fan setting Heating or Cooling airflows are approximately 50 of selected cooling v...

Page 18: ...eating or Cooling airflows are approximately 50 of selected cooling value 2 LOW airflow 350 cfm ton is COMFORT HUMID CLIMATE setting NORMAL airflow 400 cfm ton is typical setting HIGH airflow 450 cfm...

Page 19: ...RFLOW SETTING DIP SWITCH SETTING EXTERNAL STATIC PRESSURE SW 1 SW 2 SW 3 SW 4 0 1 0 3 0 5 0 7 0 9 1 5 LOW 350 CFM TON OFF OFF OFF ON CFM WATTS 525 45 525 70 525 100 525 135 525 160 NORMAL 400 CFM TON...

Page 20: ...1350 455 1350 480 1210 435 1070 390 900 345 1 At continuous fan setting Heating or Cooling airflows are approximately 50 of selected cooling value 2 LOW airflow 350 cfm ton is COMFORT HUMID CLIMATE se...

Page 21: ...TONS AIRFLOW SETTING DIP SWITCH SETTING EXTERNAL STATIC PRESSURE SW 1 SW 2 SW 3 SW 4 0 1 0 3 0 5 0 7 0 9 2 5 LOW 350 CFM TON ON ON OFF ON CFM WATTS 870 100 885 140 887 185 881 230 876 270 NORMAL 400...

Page 22: ...M952V120DD60AB FURNACE COOLING AIRFLOW CFM AND POWER WATTS VS EXTERNAL STATIC PRESSURE WITH FILTER OUTDOOR UNIT SIZE TONS AIRFLOW SETTING DIP SWITCH SETTING EXTERNAL STATIC PRESSURE SW 1 SW 2 SW 3 SW...

Page 23: ...l 3 times within 6 seconds The control will acknowledge the reset by turning on the red LED for 2 seconds FAULT CODE RECOVERY On power up last 4 faults if any will be flashed on the red LED The newest...

Page 24: ...en applying an airflow command signal to the BK input such as with the variable speed single zone and multi zone system controller On single speed cooling only non heat pump systems jumper Y to O for...

Page 25: ...l Gas Valve Circuit Fault 37 8 Flash Troubleshooting Low Flame Sense Fault 38 9 Flash Troubleshooting Open Inducer Limit 39 VS No Air Flow Incorrect Air Flow The following pages include troubleshootin...

Page 26: ...FMR N CNT05160 Line Voltage Connections 24 Volt Furnace Component Connections 5 Amp Control Fuse Low Voltage Terminal Strip 16 pin ECM Connector Indoor airflow configuration dip switches Fault LED Red...

Page 27: ...R OR PRESSURE SWITCH ERROR 4 Flashes OPEN LIMIT OR ROLLOUT SWITCH 5 Flashes FLAME SENSED WHEN NO FLAME SHOULD BE PRESENT 6 Flashes LINE REVERSE POLARITY 7 Flashes GAS VALVE CIRCUIT ERROR 8 Flashes WEA...

Page 28: ...present from transformer and fuse good YES NO Repair low voltage wiring replace transformer or fuse as needed Repair high voltage connection to unit What is the fault light flash code See FAULT LED F...

Page 29: ...eck operation NO Flame sensor is good NO Is minimum outlet gas manifold pressure maintained Does inlet gas pressure drop more than 2 WC NO Correct inlet gas pressure Check operation Replace Gas Valve...

Page 30: ...30 Service Facts M952 SF 4 Correct positioning of ignitor sensor NOTE the slight over lap of the ignitor and the burner Igniter slightly overlapping OD of burner...

Page 31: ...ion YES While the furnace is operating on 1st stage heat make a call for 2nd stage heat Allow 30 seconds for the furnace to transition to 2nd stage Is 24 volts present measured across PS2 yellow 7 to...

Page 32: ...rrect gas pressure Check operation NO Is temperature at high limit above the switch setting YES Replace high limit switch NO YES Is temperature at reverse flow switch above specifications Replace reve...

Page 33: ...Is flue piping restricted Correct as needed Check operation YES Are flames from burners impinging on sides of heat exchanger NO YES When fan comes on do flames stay consistent Replace heat exchanger...

Page 34: ...ing per installation instructions Using a back up wrench install new gas valve Check operation Inspect gas supply for leaks and have gas supplier check gas quality Are there signs of moisture or debri...

Page 35: ...952 SF 4 DEFINITION Polarity Fault Incoming high voltage wiring is reversed Disconnect incoming electrical power to furnace Reverse 120 vac power leads to furnace wiring Reconnect power Check operatio...

Page 36: ...rcuit Error 24 volts is present when it should not be present Is 24 VAC nominal voltage present between Red lead at gas valve connection to chassis ground Turn Comfort Control to OFF position Correct...

Page 37: ...37 Service Facts M952 SF 4...

Page 38: ...en Replace Inducer Limit switch Check operation YES NO Definition This error is normally caused by improper installation or application of the furnace venting system Disconnect electrical power from t...

Page 39: ...r run YES Replace Wire harness NO Is 24 VAC measured between R transformer hot and B C transformer common at the low voltage field connections NO Replace transformer NO Repair wiring between incoming...

Page 40: ...licy of continuous product and product data improvement and reserves the right to change design and specifications without notice Ingersoll Rand 6200 Troup Highway Tyler TX 75707 For more information...

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