Primus D55 Service Manual

Download

Page 1

D55

SERVICE MANUAL INDUSTRIAL DRYERS PUBLICATION DATE: 10/03

70276001

Page 2

Page 3

Table of Contents

Section 1 – Safety Information

Locating An Authorized Service Person .................4

Section 2 – Introduction

Model Identification ................................................5

Customer Service ....................................................6

Serial Plate Location ...............................................6

Safety Warnings and Decals ...................................7

Safety Precautions for Servicing Tumblers ............7

Section 3 – Troubleshooting

1. Motor Does Not Start .......................................9

2. Motor Overload Protector Cycles

Repeatedly ......................................................10

3. Motor Runs But Cylinder Does Not Turn. .....10

4. Motor Does Not Stop .....................................10

5. Gas Burner Does Not Ignite ...........................11

6. Burner Ignites And Goes Out Repeatedly .....12

7. Burner Shuts off Prematurely ........................12

8. Burner Repeatedly Cycles Off On High Limit

Thermostat .....................................................13

9. Steam Valve or Burner Does Not Shut-off ...13

10. Clothes Do Not Dry .......................................14

11. Tumbler Overheating .....................................14

12. Burners Not Burning Properly - Gas Models 15

13. Loading Door Opens During Operation ........15

14. Tumbler Runs But No Steam To Coils - Steam

Models ............................................................15

15. Water In Steam Line - Steam Models ............16

16. Tumbler Will Not Start, Time On Drying Timer,

Door Closed ...................................................17

17. Motor Runs But Will Not Heat ......................18

18. Cylinder Turns, But Will Not Heat ................19

Section 4 – Grounding

19. Grounding Instructions ..................................21

Section 5 – Service Procedures

20. Access Panel/Interior Control Box ................23

21. Control Fuse Holder .......................................23

22. Control Fuse ...................................................24

23. Signal Buzzer .................................................24

24. Load Ready Light ..........................................25

25. Ignition Reset Switch .....................................25

26. Emergency Stop Switch .................................25

27. Push-To-Start Switch .....................................25

28. Cool Down and Heat Lights ..........................25

29. Cool Down and Heat Timers .........................27

30. Relay ..............................................................27

31. Reversing/Nonreversing Switch ....................27

32. Temperature Switch .......................................27

33. Temperature Control Board ...........................28

34. Electronic Control ..........................................28

35. Loading Door Assembly ................................30

36. Loading Door Handle ....................................30

37. Loading Door Switch .....................................30

38. Front Panel .....................................................31

39. Loading Door Hinge Lug ...............................33

40. Thermistor ......................................................33

41. Lint Panel Switch ...........................................34

42. Gas Valve .......................................................35

43. Igniter .............................................................35

44. Ignition Control ..............................................35

45. Burner Tube ...................................................35

46. Stove High Limit Thermostat ........................36

47. Cabinet High Limit Thermostat/ Load Ready

Thermostat .....................................................36

48. Steam Coils ....................................................37

49. Drive Guard Cover .........................................39

50. Airflow Switch ...............................................40

51. Cylinder Belt ..................................................40

52. Drive Belt .......................................................41

53. Step Pulley Assembly ....................................41

Critical Torques ....................................................42

54. Cylinder Sheave .............................................43

55. Motor Pulley ..................................................44

56. Jackshaft Assembly ........................................44

57. Cylinder Assembly ........................................44

58. Trunnion Bearings .........................................45

59. Fan Motor Drive And Fan Assembly ............46

60. Fan (60 Hertz Models) ...................................46

61. Fan (50 Hertz Models) ...................................46

62. Trunnion Shaft Assembly ..............................48

63. Cylinder Drive Motor ....................................49

64. Reversing Timer ............................................50

65. Reversing Contactor ......................................50

66. Fan Motor Contactor ......................................50

67. Transformer ...................................................50

(continued)

70276001 1

Page 4

Section 6 – Adjustments

68. Leveling .........................................................53

69. Main Gas Burner Air Inlet Shutters ...............54

70. Airflow Switch ...............................................55

71. Loading Door Strike ......................................55

72. Cylinder Belt ..................................................56

73. Drive Belt Tension .........................................59

74. Fan Belt Tension ............................................60

Section 7 – Wiring Schematics .........................61

AT, HT, PT, ST, UT, WT and XT Manual Timer Models

208-230 VAC, 60 Hertz, 3 Phase Gas..............62

380-415 VAC, 50 Hertz, 3 Phase Gas..............63

460 VAC, 60 Hertz, 3 Phase Gas .....................64

208-230 VAC, 60 Hertz, 3 Phase Steam .........65

380-415 VAC, 50 Hertz, 3 Phase Steam .........66

460 VAC, 60 Hertz, 3 Phase Steam .................67

HU, PU, SU, UU and XU Manual Timer Models

380-415 VAC, 50 Hertz, 3 Phase Gas .............68

380-415 VAC, 50 Hertz, 3 Phase Steam .........69

AT, HT, PT, ST, UT, WT and XT Micro Control RM Models

208-230 VAC, 60 Hertz, 3 Phase Gas .............70

380-415 VAC, 50 Hertz, 3 Phase Gas .............71

460-480 VAC, 60 Hertz, 3 Phase Gas .............72

208-230 VAC, 60 Hertz, 3 Phase Steam .........73

380-415 VAC, 50 Hertz, 3 Phase Steam .........74

460-480 VAC, 60 Hertz, 3 Phase Steam .........75

HU, PU, SU, UU and XU Micro Control RM Models

380-415 VAC, 50 Hertz, 3 Phase Gas .............76

380-415 VAC, 50 Hertz, 3 Phase Steam .........77

2 70276001

Page 5

Section 1

Safety Information

Throughout this manual and on machine decals, you will find precautionary statements (“CAUTION”, “WARNING”, and “DANGER”) followed by specific instructions. These precautions are intended for the personal safety of the operator, user, servicer, and those maintaining the machine.

DANGER

DANGER indicates the presence of a hazard that will cause severe personal injury, death, or substantial property damage if the danger is ignored.

WARNING

WARNING indicates the presence of a hazard that can cause severe personal injury, death, or substantial property damage if the warning is ignored.

In the interest of safety, some general precautions relating to the operation of this machine follow.

WARNING

• Failure to install, maintain and/or operate this product according to the manufacturer’s instructions may result in conditions which can produce serious injury, death and/or property damage.

• Do not repair or replace any part of the product or attempt any servicing unless specifically recommended or published in this Service Manual and unless you understand and have the skills to carry out the servicing.

• Whenever ground wires are removed during servicing, these ground wires must be reconnected to ensure that the product is properly grounded and to reduce the risk of fire, electric shock, serious injury or death.

W006R2

CAUTION

CAUTION indicates the presence of a hazard that will or can cause minor personal injury or property damage if the caution is ignored.

Additional precautionary statements (“IMPORTANT” and “NOTE”) are followed by specific instructions.

IMPORTANT: The word “IMPORTANT” is used to inform the reader of specific procedures where minor machine damage will occur if the procedure is not followed.

NOTE: The word “NOTE” is used to communicate installation, operation, maintenance or servicing information that is important but not hazard related.

70276001 3

Page 6

Section 1 Safety Information

IMPORTANT INFORMATION: During the lifetime of a tumbler, it may require service. The information contained in this manual was written and is intended for use by qualified service technicians who are familiar with the safety procedures required in the repair of a tumbler, and who are equipped with the proper tools and testing equipment.

WARNING

To reduce the risk of electric shock, fire, explosion, serious injury or death:

• Disconnect electric power to the tumbler before servicing.

• Never start the tumbler with any guards/ panels removed.

• Whenever ground wires are removed during servicing, these ground wires must be reconnected to ensure that the tumbler is properly grounded.

W240

WARNING

NOTE: The WARNING and IMPORTANT instructions appearing in this manual are not meant to cover all possible conditions and situations that may occur. It must be understood that common sense, caution and carefulness are factors which CANNOT be built into this tumbler. These factors MUST BE supplied by the person(s) installing, maintaining or operating the tumbler.

Always contact your dealer, distributor, service agent or the manufacturer on any problems or conditions you do not understand.

Locating An Authorized Service Person

Alliance Laundry Systems is not responsible for personal injury or property damage resulting from improper service. Review all service information before beginning repairs.

Warranty service must be performed by an authorized technician, using authorized factory parts. If service is required after the warranty expires, Alliance Laundry Systems also recommends contacting an authorized technician and using authorized factory parts.

Repairs that are made to your products by unqualified persons can result in hazards due to improper assembly or adjustments subjecting you or the inexperienced person making such repairs to the risk of serious injury, electrical shock or death.

W007

CAUTION

If you or an unqualified person perform service on your product, you must assume the responsibility for any personal injury or property damage which may result. The manufacturer will not be responsible for any injury or property damage arising from improper service and/or service procedures.

W008

4 70276001

Page 7

Section 2

Introduction

Model Identification

Information in this manual is applicable to these models:

Gas Steam

AT120L

AT120N HA120L HA120N HT120L HT120N HU120L HU120N

PA120L

PA120N

PT120L

PT120N

PU120L PU120N

SA120L

Includes models with the following control suffixes (7th and 8th characters):

RM – reversing OPL micro RT – reversing manual timer

SA120N

ST120L ST120N SU120L SU120N UA120L

UA120N

UT120L

UT120N UU120L UU120N WT120L WT120N

XT120L XT120N

XU120N

AT120S HT120S

HU120S

PT120S PU120S ST120S

ST120T SU120S

UT120S UU120S WT120S XT120S XU120S

70276001 5

Page 8

Section 2 Introduction

Customer Service

If literature or replacement parts are required, contact the source from whom the machine was purchased or contact Alliance Laundry Systems at (920) 748-3950 for the name and address of the nearest authorized parts distributor.

For technical assistance, call (920) 748-3121.

Serial Plate Location

When calling or writing about your product, be sure to mention model and serial numbers. Model and serial numbers are located on serial plate as shown.

Serial

Plate

Junction Box

Cover

TMB1764S

6 70276001



Page 9

Safety Warnings and Decals

SAFETY WARNINGS and decals have been provided in key locations to remind you of important precautions for the safe operation and maintenance of your tumbler. Please take the time to review these warnings before proceeding with service work.

All decals have been designed and applied to withstand washing and cleaning. Decals should be checked periodically to be sure they have not been damaged, removed, or painted. Refer to the Parts Manual for ordering replacement decals.

Safety Precautions for Servicing Tumblers

• Disconnect electrical service.

• Shut off supply gas valve before servicing gas components.

Section 2 Introduction

• Access panel MUST be reinstalled after inspection or servicing of tumbler is completed.

• Use a non-corrosive leak detecting compound to check all pipe connections for gas leaks. DO NOT USE AN OPEN FLAME TO CHECK FOR GAS LEAKS!

• Belt guard MUST be reinstalled after inspection or servicing of tumbler is completed.

• Contactor box cover MUST be reinstalled after inspection or servicing of electric and/or reversing tumbler is completed.

• Loading door switch MUST be operational before putting tumbler into service.

• Junction box cover MUST be reinstalled after inspection or servicing of tumbler is completed.

70276001 7



Page 10

Section 2 Introduction

Notes

8 70276001



Page 11

Section 3

Troubleshooting

WARNING

To reduce the risk of electric shock, fire, explosion, serious injury or death:

• Disconnect electric power to the tumbler before servicing.

• Close gas shut-off valve to gas tumbler before servicing.

• Close steam valve to steam tumbler before servicing.

• Never start the tumbler with any guards/panels removed.

• Whenever ground wires are removed during servicing, these ground wires must be reconnected to ensure that the tumbler is properly grounded.

IMPORTANT: Refer to appropriate wiring diagram for aid in testing tumbler components.

1. MOTOR DOES NOT START

POSSIBLE CAUSE TO CORRECT

Electrical power off, circuit breaker tripped or blown control fuse.

Inoperative transformer. • Replace transformer. Loading door not closed or inoperative door switch. • Close door or test switch and replace if inoperative. Lint panel switch not closing. • Test lint panel switch, replace if inoperative. Trunnion bearings binding. • Replace trunnion bearings. Start circuit not completed. • Press start switch or test switch and replace if inoperative. Idler bearings binding. • Replace bearings. Inoperative motor. • Have motor tested and replace if inoperative. Inoperative relay. • Replace relay. Timer improperly set. • Turn drying timer clockwise to desired setting. Inoperative timer. • Test timer and replace if inoperative. Broken, loose or incorrect wiring. • Refer to wiring diagram located on back of tumbler or in

• Check service to tumbler.

• Check primary and secondary fuses.

literature packet.

W002

70276001 9

Page 12

Section 3 Troubleshooting

WARNING

To reduce the risk of electric shock, fire, explosion, serious injury or death:

• Disconnect electric power to the tumbler before servicing.

• Close gas shut-off valve to gas tumbler before servicing.

• Close steam valve to steam tumbler before servicing.

• Never start the tumbler with any guards/panels removed.

• Whenever ground wires are removed during servicing, these ground wires must be reconnected to ensure that the tumbler is properly grounded.

2. MOTOR OVERLOAD PROTECTOR CYCLES REPEATEDLY

POSSIBLE CAUSE TO CORRECT

Incorrect voltage. • Refer to Installation Manual for electrical requirements. Clothes load too large. • Remove part of load. Cylinder binding. • Check cylinder for binding. Refer to Adjustment Section

in this manual for cylinder adjustment.

Inadequate wiring. • Electrician should verify that wiring and voltage is

adequate.

Inadequate make-up air. • Refer to Installation Manual for make-up air

requirements. Poor maintenance. • Clean lint accumulation on and around the motor. Broken, loose or incorrect wiring. • Refer to wiring diagram located on back of tumbler or in

literature packet.

W002

3. MOTOR RUNS BUT CYLINDER DOES NOT TURN.

POSSIBLE CAUSE TO CORRECT

Motor drive pulley loose. • Tighten drive pulley bushing screws. Broken or loose cylinder belts. • Replace or adjust belts. Broken or loose drive belt. • Replace or adjust belt. Cylinder binding. • Check cylinder for binding. Refer to Adjustment Section

in this manual for proper cylinder adjustment.

4. MOTOR DOES NOT STOP

POSSIBLE CAUSE TO CORRECT

Inoperative door switch or lint panel switch. • Test switches and replace if inoperative. Inoperative timer. • Test timer and replace if inoperative. Incorrect wiring. • Refer to wiring diagram located on back of tumbler or in

literature packet. Inoperative motor contactor. • Test motor contactor and replace if inoperative.

10 70276001

Page 13

Section 3 Troubleshooting

WARNING

To reduce the risk of electric shock, fire, explosion, serious injury or death:

• Disconnect electric power to the tumbler before servicing.

• Close gas shut-off valve to gas tumbler before servicing.

• Close steam valve to steam tumbler before servicing.

• Never start the tumbler with any guards/panels removed.

• Whenever ground wires are removed during servicing, these ground wires must be reconnected to ensure that the tumbler is properly grounded.

5. GAS BURNER DOES NOT IGNITE

POSSIBLE CAUSE TO CORRECT

Improper or inadequate exhaust system. • Refer to the Installation Manual for exhaust system

requirements. Drying timer not selected or inoperative. • Set drying timer or replace if inoperative. Inoperative thermostat. • Test thermostat and replace if inoperative. Insufficient gas supply. • Open partially closed gas shut-off valve, or correct low

gas pressure. Check manifold pressure and adjust to

pressure specified on serial plate. If pressure cannot be

obtained, have gas supplier check main pressure. Incorrect orifices. • Tumbler is equipped for type of gas specified on serial

plate. If orifices are different from that specified on serial

plate, obtain and install proper orifices. Inoperative igniter. • Test igniter and replace if inoperative. Inoperative igniter control. • Test igniter control and replace if inoperative. Inoperative gas valve coils. • Test coils and replace if inoperative. Lint buildup. • Clean lint compartment after every eight-hour shift.

Check back draft damper for lint accumulation. Check

ductwork for lint build-up. Inadequate ductwork and make-up air. • Refer to Installation Manual to ensure that ductwork and

make-up air openings are sized properly. Inoperative airflow switch. • Test switch and replace if inoperative. Lint door panel not closed properly. • Open lint door panel, place lint door and panel back on

tumbler (ensuring a tight fit). Broken, loose or incorrect wiring. • Refer to wiring diagram located on back of tumbler or in

literature packet. Improper fan rotation. • May be due to improper wiring resulting in low airflow.

Refer to Installation Manual.

W002

70276001 11



Page 14

Section 3 Troubleshooting

WARNING

To reduce the risk of electric shock, fire, explosion, serious injury or death:

• Disconnect electric power to the tumbler before servicing.

• Close gas shut-off valve to gas tumbler before servicing.

• Close steam valve to steam tumbler before servicing.

• Never start the tumbler with any guards/panels removed.

• Whenever ground wires are removed during servicing, these ground wires must be reconnected to ensure that the tumbler is properly grounded.

6. BURNER IGNITES AND GOES OUT REPEATEDLY

POSSIBLE CAUSE TO CORRECT

Insufficient gas pressure. • Check gas supply and pressure. Low flame will not

maintain sensor conductivity. Burner ports plugged. • Check burner tubes for build-up. Improper or inadequate exhaust system or make-up

air Inoperative high limit or cabinet limit thermostat. • Test thermostat and replace if inoperative. Improper orifices. • Tumbler is equipped for type of gas specified on serial

Improper flame recognition circuit. • Replace high voltage lead.

•Refer to Installation Manual for exhaust and make-up air

requirements.

plate. If orifices are different from that specified on serial

plate, obtain and install proper orifices.

W002

• Replace ignitor

• Replace ignition control module.

7. BURNER SHUTS OFF PREMATURELY

POSSIBLE CAUSE TO CORRECT

Improper or inadequate exhaust and/or make-up air system.

•Refer to Installation Manual for exhaust and make-up air

requirements. Insufficient gas supply. • Open partially closed gas shut-off valve or correct low

pressure. Tumbler not properly equipped for type of gas used

or altitude.

• Tumbler is equipped for type of gas specified on serial plate. If not properly equipped for gas type and altitude, obtain and install correct components.

Improperly adjusted burner flame. • Refer to Adjustment Section in this manual for burner

flame adjustment.

Cycling off on high limit thermostat. • Refer to Paragraph 8. Broken, loose or incorrect wiring. • Refer to wiring diagram located on back of tumbler or in

literature packet.

Improper fan rotation. • May be due to improper wiring resulting in low airflow.

Refer to Installation Manual.

Inoperative gas valve coils. • Test coils and replace if inoperative.

12 70276001

Page 15

Section 3 Troubleshooting

WARNING

To reduce the risk of electric shock, fire, explosion, serious injury or death:

• Disconnect electric power to the tumbler before servicing.

• Close gas shut-off valve to gas tumbler before servicing.

• Close steam valve to steam tumbler before servicing.

• Never start the tumbler with any guards/panels removed.

• Whenever ground wires are removed during servicing, these ground wires must be reconnected to ensure that the tumbler is properly grounded.

8. BURNER REPEATEDLY CYCLES OFF ON HIGH LIMIT THERMOSTAT

POSSIBLE CAUSE TO CORRECT

External exhaust system is longer than recommended or inadequate make-up air.

•Refer to Installation Manual for exhaust and make-up air

requirements.

Clogged lint screen. • Remove screen and clean. Lint screen and compartment

should be cleaned after every eight hour shift. Lint in internal tumbler ductwork. • Disassemble tumbler ductwork and clean. Lint in external exhaust system. • Disassemble exhaust system and clean. High limit thermostat cycling at too low a

• Replace thermostat.

temperature. Lint door panel not closed properly. • Remove lint door panel - place lint door panel back on

tumbler (ensuring a tight fit). Improper fan rotation. • May be due to improper wiring resulting in low airflow.

Refer to Installation Manual.

W002

9. STEAM VALVE OR BURNER DOES NOT SHUT-OFF

POSSIBLE CAUSE TO CORRECT

Impurities on gas or steam valve seat, preventing

• Replace gas valve or disassemble and clean steam valve.

valve from closing. Inoperative drying timer or control relay. • Replace timer or control relay. Incorrect wiring. • Refer to wiring diagram located on back of tumbler or in

literature packet.

70276001 13

Page 16

Section 3 Troubleshooting

WARNING

To reduce the risk of electric shock, fire, explosion, serious injury or death:

• Disconnect electric power to the tumbler before servicing.

• Close gas shut-off valve to gas tumbler before servicing.

• Close steam valve to steam tumbler before servicing.

• Never start the tumbler with any guards/panels removed.

• Whenever ground wires are removed during servicing, these ground wires must be reconnected to ensure that the tumbler is properly grounded.

10. CLOTHES DO NOT DRY

POSSIBLE CAUSE TO CORRECT

Heat source inoperative. • Refer to Paragraph 17. Too much water in articles being dried. • Remove excess water. Clothes load too large. • Remove part of load. 120 pounds dry weight (AHAM

cotton load) is maximum load.

Improper or inadequate exhaust system. • Refer to Installation Manual for exhaust requirements. Heat source shuts off prematurely. • Refer to Paragraph 18. Drying timer improperly set. • Set selector for higher setting. Incorrect voltage. • Refer to Installation Manual for electrical requirements. Inadequate make-up air. • Refer to Installation Manual for make-up air

requirements.

Improper fan rotation. • May be due to improper wiring resulting in low airflow.

Refer to Installation Manual.

W002

11. TUMBLER OVERHEATING

POSSIBLE CAUSE TO CORRECT

Gas Models: Incorrect main burner orifices. • Replace orifices. Gas Models: Gas pressure too high. • Adjust gas pressure as specified on serial plate. Steam Models: Steam solenoid valve stuck open. • Clean solenoid valve and replace if necessary. Inadequate make-up air. • Refer to Installation Manual for make-up air

requirements. Lint accumulation. • Remove lint. Restricted or inadequate exhaust system. • Remove obstruction or lint build-up from exhaust

ductwork. Refer to the Installation Manual for exhaust

system requirements. Inoperative thermostat. • Replace thermostat.

14 70276001

Page 17

Section 3 Troubleshooting

WARNING

To reduce the risk of electric shock, fire, explosion, serious injury or death:

• Disconnect electric power to the tumbler before servicing.

• Close gas shut-off valve to gas tumbler before servicing.

• Close steam valve to steam tumbler before servicing.

• Never start the tumbler with any guards/panels removed.

• Whenever ground wires are removed during servicing, these ground wires must be reconnected to ensure that the tumbler is properly grounded.

12. BURNERS NOT BURNING PROPERLY - GAS MODELS

POSSIBLE CAUSE TO CORRECT

Burner air shutters incorrectly adjusted. • Refer to Adjustment Section in this manual for proper

flame adjustment. Foreign material in burners. • Disassemble burners and remove obstruction. Gas pressure too high. • Check serial plate on back of tumbler for correct gas

pressure. Incorrect orifices. • Tumbler is equipped for type of gas specified on serial

plate. If orifices are different from that specified on serial

plate, obtain and install proper orifices. Restricted or blocked exhaust duct. • Disassemble and clean exhaust system. Airflow switch not functioning properly. • Check adjustment and replace airflow switch if necessary. Improper fan rotation. • May be due to improper wiring resulting in low airflow.

Refer to Installation Manual.

W002

13. LOADING DOOR OPENS DURING OPERATION

POSSIBLE CAUSE TO CORRECT

Door strike improperly adjusted. • Refer to Adjustment Section in this manual for door strike

adjustment. Tumbler improperly leveled. • Refer to Adjustment Section in this manual for leveling

adjustment.

14. TUMBLER RUNS BUT NO STEAM TO COILS - STEAM MODELS

POSSIBLE CAUSE TO CORRECT

Shut-off valve closed. • Check all valves in supply and return lines make sure they

are open. Blocked steam trap. • Remove trap and clean. Replace if inoperative. Inoperative solenoid valve. • Check operation of solenoid valve. Incorrect installation of check valve. • Check for inlet and outlet markings on check valve and

invert if necessary. Clogged strainer. • Remove strainer and clean. Clogged steam valve. • Remove steam valve and clean or replace. Clean strainer

before returning unit to service.

70276001 15

Page 18

Section 3 Troubleshooting

WARNING

To reduce the risk of electric shock, fire, explosion, serious injury or death:

• Disconnect electric power to the tumbler before servicing.

• Close gas shut-off valve to gas tumbler before servicing.

• Close steam valve to steam tumbler before servicing.

• Never start the tumbler with any guards/panels removed.

• Whenever ground wires are removed during servicing, these ground wires must be reconnected to ensure that the tumbler is properly grounded.

15. WATER IN STEAM LINE - STEAM MODELS

POSSIBLE CAUSE TO CORRECT

Incorrect installation of steam piping. • Refer to Installation Manual for steam requirements. Trap functioning improperly. • Check trap for size and capacity. If trap is dirty or

sluggish, clean thoroughly or replace. Check return line for high back pressure. Check trap for proper installation. Refer to Installation Manual for requirements.

W002

16 70276001

Page 19

Section 3 Troubleshooting

WARNING

To reduce the risk of electric shock, fire, explosion, serious injury or death:

• Disconnect electric power to the tumbler before servicing.

• Close gas shut-off valve to gas tumbler before servicing.

• Close steam valve to steam tumbler before servicing.

• Never start the tumbler with any guards/panels removed.

• Whenever ground wires are removed during servicing, these ground wires must be reconnected to ensure that the tumbler is properly grounded.

16. TUMBLER WILL NOT START, TIME ON DRYING TIMER, DOOR CLOSED

W002

CHECK FOR

LINE VOLTAGE

INTO

TRANSFORMER

CHECK

ELECTRICAL

SERVICE TO TUMBLER (Fuses/Circuit

Breaker)

24 VOLTS INTO

BROKEN WIRE

FUSE AND LINT PANEL SWITCH

TRANSFORMER

CHECK FOR

LINT PANEL

SWITCH

CHECK FOR

BETWEEN

CHECK FOR

CONTROL

(24 VAC)

VOLT AG E

OUT OF

REPLACE

YES

CHECK FOR

24 VOLTS

OUT OF LINT

SWITCH

CHECK FOR LINT PANEL

SWITCH

FUNCTIONING

PROPERLY

REPLACE OR ADJUST LINT

PANEL SWITCH

CHECK FOR

CONTROL

CIRCUIT FUSE

REPLACE

PANEL

BLOWN

YES

FUSE

YES

NOYES

CHECK FOR

24 VOLTS AT

TERMINAL 3 OF

CONTROL RELAY

CHECK FOR

BROKEN WIRE

CONNECTION AT

HARNESS PLUG

CHECK FOR

24 VOLTS

INTO DOOR

SWITCH

CHECK FOR

BROKEN WIRE

BETWEEN FUSE AND

DOOR SWITCH

OR POOR

YES

TERMINAL B OF

DRYING TIMER

CHECK FOR 24 VOLTS OUT OF DOOR SWITCH

CHECK FOR

DOOR SWITCH

FUNCTIONING

PROPERLY

REPLACE

DOOR SWITCH

CHECK FOR

24 VOLTS

ACROSS COIL

TERMINALS

OF CONTROL

RELAY

CHECK FOR

24 VOLTS ON

REPLACE

TIMER

YES

CHECK FOR

24 VOLTS ON

TERMINAL 1

OF CONTROL

RELAY

REPLACE

RELAY

70276001 17

CHECK FOR

YES

24 VOLTS INTO

PUSH-TO-START

SWITCH

CHECK FOR

BROKEN WIRE

FROM CONTROL

RELAY

TERMINAL 1

PRESS PUSH-TO-

YES

START SWITCH.

CHECK FOR 24 VOLTS OUT OF

PUSH-TO-START

SWITCH

REPLACE

SWITCH

CHECK FOR

24 VOLTS

ACROSS FAN

CONTACTOR

COIL

CHECK FOR

BROKEN WIRE

OR POOR

CONNECTION AT

HARNESS PLUG

YESYES

REPLACE

FAN

CONTACTOR

Page 20

Section 3 Troubleshooting

WARNING

To reduce the risk of electric shock, fire, explosion, serious injury or death:

• Disconnect electric power to the tumbler before servicing.

• Close gas shut-off valve to gas tumbler before servicing.

• Close steam valve to steam tumbler before servicing.

• Never start the tumbler with any guards/panels removed.

• Whenever ground wires are removed during servicing, these ground wires must be reconnected to ensure that the tumbler is properly grounded.

17. MOTOR RUNS BUT WILL NOT HEAT

W002

IGNITER

SPARKING

YES

GREEN WIRE

FROM IEI

CONTROL

CONNECTED TO

GROUND

TERMINAL

YES

GAS SHUT-OFF

VALVE TURNED ON

YES

24 VOLTS

PRESENT ON

BLACK WIRE FROM

IEI CONTROL

OPEN AND CLOSE

IN SAFETY

LOCKOUT

YES

DOOR

CONNECT GREEN

WIRE TO GROUND

TERMINAL

TURN ON

GAS SHUT-OFF

VAL VE

REPLACE

IEI CONTROL

RESISTANCE OF

HIGH VOLTAGE

LEAD GREATER

THAN 28,000 OHMS

OR LESS THAN

10,500 OHMS

REPLACE

HIGH VOLTAGE

LEAD

YES

IGNITER GAP

IS NOT 5/32 INCH

(.397 CM) OR

CERAMIC CRACKED

YES

REGAP OR

REPLACE

IGNITER

REPLACE

IEI CONTROL

YES

CHECK GAS VALVE

COILS FOR OPEN

CIRCUIT

18 70276001

YES

REPLACE

GAS VALVE

OR COIL

Page 21

Section 3 Troubleshooting

WARNING

To reduce the risk of electric shock, fire, explosion, serious injury or death:

• Disconnect electric power to the tumbler before servicing.

• Close gas shut-off valve to gas tumbler before servicing.

• Close steam valve to steam tumbler before servicing.

• Never start the tumbler with any guards/panels removed.

• Whenever ground wires are removed during servicing, these ground wires must be reconnected to ensure that the tumbler is properly grounded.

18. CYLINDER TURNS, BUT WILL NOT HEAT

W002

AIRFLOW SWITCH

STAYS OPEN

GAS SHUT-OFF

VALVE OPEN

YES

24 VOLTS PRESENT AT OUTPUT TERMINAL OF

TEMPERATURE CONTROL BOARD

24 VOLTS PRESENT AT

INPUT TERMINAL OF

TEMPERATURE CONTROL BOARD

FAN TURNING COUNTER-

YES

CLOCKWISE AS VIEWED

YES

FROM THE FRONT

REVERSE ANY TWO OF THE

ELECTRICAL SERVICE LEADS AT

THE FAN MOTOR CONTACTOR.

OPEN GAS SHUT-OFF VALVE

YES

CHECK FOR BROKEN OR LOOSE

WIRE TO IGNITION CONTROL

REPLACE THERMISTOR OR

TEMPERATURE CONTROL BOARD

REFER TO INSTALLATION MANUAL

FOR MAKEUP AIR AND EXHAUST DUCT

REQUIREMENTS

24 VOLTS PRESENT AT TERMINAL 4 OF RELAY

24 VOLTS PRESENT AT TERMINAL 6 OF RELAY

24 VOLTS PRESENT AT OUTPUT

TERMINAL OF STOVE HIGH LIMIT

24 VOLTS PRESENT AT INPUT

TERMINAL OF STOVE HIGH LIMIT

70276001 19

THERMOSTAT

YES

CHECK FOR BROKEN OR LOOSE

WIRE TO MAIN THERMOSTAT

24 VOLTS PRESENT ACROSS COIL

TERMINALS OF RELAY

CHECK FOR BROKEN OR

LOOSE WIRE TO RELAY

REPLACE STOVE HIGH LIMIT

THERMOSTAT

(continued on following page)

YES

REPLACE

RELAY

Page 22

Section 3 Troubleshooting

18. CYLINDER TURNS, BUT WILL NOT HEAT (continued)

24 VOLTS PRESENT AT OUTPUT

TERMINAL OF AIRFLOW SWITCH

24 VOLTS PRESENT AT INPUT

TERMINAL OF AIRFLOW SWITCH

24 VOLTS PRESENT AT OUTPUT

TERMINAL OF EXHAUST HIGH LIMIT

THERMOSTAT

24 VOLTS PRESENT AT INPUT

TERMINAL OF CABINET LIMIT

THERMOSTAT

24 VOLTS PRESENT ON

ORG/BRN WIRE OF FAN MOTOR

YES

CHECK FOR BROKEN OR LOOSE WIRE

TO STOVE HIGH LIMIT THERMOSTAT

REPLACE AIRFLOW SWITCH

CHECK FOR BROKEN OR LOOSE WIRE

TO AIRFLOW SWITCH

REPLACE CABINET LIMIT

THERMOSTAT

CHECK FOR BROKEN OR LOOSE WIRE

TO CABINET LIMIT THERMOSTAT

20 70276001

Page 23

Section 4

Grounding

WARNING

To reduce the risk of electric shock, fire, explosion, serious injury or death:

• Disconnect electric power to the tumbler before servicing.

• Close gas shut-off valve to gas tumbler before servicing.

• Close steam valve to steam tumbler before servicing.

• Never start the tumbler with any guards/panels removed.

• Whenever ground wires are removed during servicing, these ground wires must be reconnected to ensure that the tumbler is properly grounded.

WARNING

To reduce the risk of fire and electric shock, check with a qualified serviceperson for proper grounding procedures. Improper connection of the equipment grounding conductor may result in a risk of electric shock.

W002

W068R1

WARNING

To reduce the risk of fire and electric shock if electrical supply is coming from a three phase service:

• If there is a “High Leg” or “Stinger Leg” it should be connected to L3.

19. GROUNDING INSTRUCTIONS

This tumbler must be grounded. In the event of malfunction or breakdown, grounding will reduce the risk of electric shock by providing the path of least resistance for electric current. This tumbler must be connected to a grounded metal, permanent wiring system or an equipment grounding conductor must be run with the circuit conductors and connected to the appropriate ground location.

NOTE: To ensure protection against shock, this tumbler MUST be electrically grounded in accordance with local codes, or, in the absence of local codes, with the latest edition of the National Electrical Code ANSI/NFPA No. 70. In Canada the electrical connections are to be made in accordance with CSA C22.1 or the latest edition of the Canadian Electrical Code, Part I and/or local codes. Electrical work should be done by a qualified electrician.

WARNING

All electrical connections should be made by a qualified electrician.

To reduce the risk of electrical shock, deenergize the electrical circuit being connected to the tumbler before making any electrical connections. Never attempt to connect a live circuit.

W070

W446

70276001 21

Page 24

Section 4 Grounding

Notes

22 70276001

Page 25

Section 5

Service Procedures

WARNING

To reduce the risk of electric shock, fire, explosion, serious injury or death:

• Disconnect electric power to the tumbler before servicing.

• Close gas shut-off valve to gas tumbler before servicing.

• Close steam valve to steam tumbler before servicing.

• Never start the tumbler with any guards/panels removed.

• Whenever ground wires are removed during servicing, these ground wires must be reconnected to ensure that the tumbler is properly grounded.

W002

20. ACCESS PANEL/INTERIOR CONTROL BOX

a. Remove four screws holding access panel to

cabinet. Refer to Figure 1.

b. Lift access panel off top edge of front panel and

pull panel forward. Refer to Figure 1.

c. Remove interior control box cover. Refer to

Figure 2.

21. CONTROL FUSE HOLDER

a. Remove four screws holding access panel to

cabinet. Refer to Figure 1.

Interior

Control Box

b. Lift access panel off top edge of front panel and

pull panel forward. Refer to Figure 1.

c. Remove interior control box cover. Refer to

Figure 2.

d. Locate fuse holder on center wall of interior

control box and disconnect wires to fuse holder terminals.

e. Release locking nut on fuse holder at rear

surface of interior control box center wall and remove fuse holder.

NOTE: Refer to wiring diagram when rewiring fuse holder.

Access

Panel

Exterior

Control Box

TMB1758S

Figure 1

70276001 23

Access Panel

Attaching

Screws

Front

Panel

Page 26

Section 5 Service Procedures

WARNING

To reduce the risk of electric shock, fire, explosion, serious injury or death:

• Disconnect electric power to the tumbler before servicing.

• Close gas shut-off valve to gas tumbler before servicing.

• Close steam valve to steam tumbler before servicing.

• Never start the tumbler with any guards/panels removed.

• Whenever ground wires are removed during servicing, these ground wires must be reconnected to ensure that the tumbler is properly grounded.

W002

22. CONTROL FUSE

Refer to Figure 2. a. Remove four screws from top and bottom

surfaces of exterior control box cover and remove cover, disconnecting control box cover harness or load ready light wires.

b. Remove screw from left and right sides of

control bracket securing control plate. Refer to

Figure 4. c. Pivot plate forward to horizontal. d. Grasp fuse cover and rotate left until cover

releases. e. Replace fuse.

23. SIGNAL BUZZER

a. Remove four screws holding access panel to

cabinet. Refer to Figure 1.

b. Lift access panel off top edge of front panel and

pull panel forward. Refer to Figure 1.

c. Remove interior control box cover. Refer to

Figure 2.

d. Locate buzzer on center wall of interior control

box and disconnect wires to signal terminals.

e. Rotate buzzer to remove from control box wall.

NOTE: Buzzer signal intensifies when turned clockwise.

NOTE: Refer to wiring diagram when rewiring signal.

Ignition Control

Interior

Control Box

with Cover

Removed

Buzzer

Interior

Control

Box

Cover

24 70276001

Temperature

Control

Fuse

TMB1759S

Figure 2

Page 27

Section 5 Service Procedures

WARNING

To reduce the risk of electric shock, fire, explosion, serious injury or death:

• Disconnect electric power to the tumbler before servicing.

• Close gas shut-off valve to gas tumbler before servicing.

• Close steam valve to steam tumbler before servicing.

• Never start the tumbler with any guards/panels removed.

• Whenever ground wires are removed during servicing, these ground wires must be reconnected to ensure that the tumbler is properly grounded.

W002

24. LOAD READY LIGHT

(Manual Timer Models) Refer to Figure 3.

a. Remove four screws from top and bottom

surfaces of exterior control box cover.

b. Pull cover forward. Disconnect wires from light

terminals and remove light by depressing locking tabs.

NOTE: Refer to wiring diagram when rewiring light.

25. IGNITION RESET SWITCH

(European Gas Models Only) Refer to Figure 3. a. Remove four screws from top and bottom

surfaces of exterior control box cover.

b. Pull cover forward. Disconnect control box

cover harness and remove cover assembly.

c. Remove wires from ignition switch terminals

and remove switch by depressing locking tabs.

NOTE: Refer to wiring diagram when rewiring reset switch.

26. EMERGENCY STOP SWITCH

(European Gas Models Only) Refer to Figure 3. a. Remove four screws from top and bottom

surfaces of exterior control box cover.

b. Pull cover forward. Disconnect control box

cover harness and remove cover assembly.

c. Remove wires from emergency stop switch

screw terminals.

d. Remove switch from control cover by

loosening long screw at bottom of switch followed by grasping a pulling down black Lshaped lever on top of switch.

27. PUSH-TO-START SWITCH

(Manual Timer Models) a. Remove four screws from top and bottom

surfaces of exterior control box cover and remove cover, disconnecting control box cover harness or load ready light wires.

b. Remove screw from left and right sides of

control bracket securing control plate. Refer to

Figure 3. c. Pivot plate forward to horizontal. d. Disconnect wires from switch terminals and

remove switch by depressing locking tabs.

NOTE: Refer to wiring diagram when rewiring switch.

28. COOL DOWN AND HEAT LIGHTS

(Manual Timer Models) a. Remove four screws from top and bottom

surfaces of exterior control box cover and

remove cover, disconnecting control box cover

harness or load ready light wires. b. Remove screw from left and right sides of

control bracket securing control plate. Refer to

Figure 3. c. Pivot plate forward to horizontal. d. Disconnect wires from light terminals and

remove switch by depressing locking tabs.

NOTE: Refer to wiring diagram when rewiring light.

NOTE: Refer to wiring diagram when rewiring emergency stop switch.

70276001 25

Page 28

Section 5 Service Procedures

Heat Timer

Knob

Relay

Mounting Screw

Relay

Control Mounting

Bracket

Heat

Timer

Temperature

Control

Board

Temperature

Switch

Heat

Light

Push-to-

Start

Switch

Cool Down

Timer Knob

Reverse/Nonreverse

Switch

Control

Trim

Cool Down

Light

Load

Ready

Light

Emergency

Stop

Button

Control

Trim

Pushnut

Ignition

Reset

Switch

Cooling

Temperature

Knob

Control

Plate

Timer

Temperature

Switch

Bracket

Emergency

Stop

Switch

Exterior

Control Box

Cover

TMB1782S

Figure 3

26 70276001

Page 29

Section 5 Service Procedures

WARNING

To reduce the risk of electric shock, fire, explosion, serious injury or death:

• Disconnect electric power to the tumbler before servicing.

• Close gas shut-off valve to gas tumbler before servicing.

• Close steam valve to steam tumbler before servicing.

• Never start the tumbler with any guards/panels removed.

• Whenever ground wires are removed during servicing, these ground wires must be reconnected to ensure that the tumbler is properly grounded.

W002

29. COOL DOWN AND HEAT TIMERS

(Manual Timer Models) a. Pull timer knob off timer shaft. Refer to

Figure 3.

b. Remove four screws from top and bottom

surfaces of exterior control box cover and remove cover, disconnecting control box cover harness or load ready light wires.

c. Remove screw from left and right sides of

control bracket securing control plate. Refer to

Figure 3. d. Pivot plate forward to horizontal. e. Remove wires from timer terminals.

f. Remove three screws holding timer to control

plate.

NOTE: Refer to wiring diagram when rewiring timer.

30. RELAY

a. Remove four screws from top and bottom

surfaces of exterior control box cover and

remove cover, disconnecting control box cover

harness or load ready light wires. b. Remove screw from left and right sides of

control bracket securing control plate. Refer to

Figure 3. c. Pivot plate forward to horizontal. d. Disconnect wires from relay terminals and

remove screws securing relay to control

mounting bracket.

NOTE: Refer to wiring diagram when rewiring relay.

31. REVERSING/NONREVERSING SWITCH

(Manual Timer Models) a. Remove four screws from top and bottom

surfaces of exterior control box cover and remove cover, disconnecting control box cover harness or load ready light wires.

b. Remove screw from left and right sides of

control bracket securing control plate. Refer to

Figure 3. c. Pivot plate forward to horizontal. d. Remove wires from switch terminals and

remove switch by depressing locking tabs.

NOTE: Refer to wiring diagram when rewiring switch.

32. TEMPERATURE SWITCH

(Manual Timer Models) a. Remove four screws from top and bottom

surfaces of exterior control box cover and

remove cover, disconnecting control box cover

harness or load ready light wires. b. Remove screw from left and right sides of

control bracket securing control plate. Refer to

Figure 3. c. Pivot plate forward to horizontal. d. Remove wires from temperature switch

terminals and two nuts securing temperature

switch bracket to control plate. e. Remove temperature switch knob from

temperature switch shaft.

f. Remove nut securing temperature switch to

temperature switch bracket and pull switch out.

NOTE: Refer to wiring diagram when rewiring switch.

70276001 27

Page 30

Section 5 Service Procedures

WARNING

To reduce the risk of electric shock, fire, explosion, serious injury or death:

• Disconnect electric power to the tumbler before servicing.

• Close gas shut-off valve to gas tumbler before servicing.

• Close steam valve to steam tumbler before servicing.

• Never start the tumbler with any guards/panels removed.

• Whenever ground wires are removed during servicing, these ground wires must be reconnected to ensure that the tumbler is properly grounded.

W002

33. TEMPERATURE CONTROL BOARD

(Manual Timer Models) Refer to Figure 3.

a. Remove four screws from top and bottom

surfaces of exterior control box cover and remove cover, disconnecting control box cover harness or load ready light wires.

b. Remove screw from left and right sides of

control bracket securing control plate. c. Pivot plate forward to horizontal. d. Disconnect two plugs from wall of interior

control box and disconnect control box cover

harness (European models only). e. Remove four screws securing control mounting

bracket to front panel, careful to support control

plate assembly.

f. Pull entire control assembly away from unit.

g. Disconnect wires from temperature control

board. h. Depress four locking tabs securing control

board to printed circuit board supports. Remove

control.

NOTE: Refer to wiring diagram when rewiring temperature control.

IMPORTANT: Due to sensitivity of electronic control, careful handling is required. As a precautionary measure, we recommend using a grounded wrist strap when handling control. Wrist strap, cord and alligator clip are designed to carry away any electrostatic charge from your body and to direct charge to an available ground.

34. ELECTRONIC CONTROL

Refer to Figure 4. a. Remove four screws from top and bottom

surfaces of exterior control box cover.

b. Pull cover forward. Disconnect control box

cover harness (European models only).

c. Remove screw from left and right sides of

control bracket securing control plate. d. Pivot plate forward to horizontal. e. Disconnect wires from control.

f. Remove four nuts securing control to control

plate.

NOTE: Refer to wiring diagram when rewiring control.

Handle control circuit board by the sides only. Do not contact circuit boards with hands or metal objects. Place control in a clean, dry area away from work area to avoid damage. Do not attempt field repair of the control. Attempted repair or tampering with the control will void its warranty.

28 70276001

Page 31

Push

Nut

Overlay

Control

Plate

Section 5 Service Procedures

Control

Mounting

Bracket

Control

Plate

Securing

Screw

Exterior

Control Box

Cover

Control

Trim

Label

Ignition Reset

Button

Emergency Stop

Button

Rivet

Electronic

Control

Expansion

Clips

Control Cover

Securing

Screws

TMB1980P

Figure 4

70276001 29

Page 32

Section 5 Service Procedures

WARNING

To reduce the risk of electric shock, fire, explosion, serious injury or death:

• Disconnect electric power to the tumbler before servicing.

• Close gas shut-off valve to gas tumbler before servicing.

• Close steam valve to steam tumbler before servicing.

• Never start the tumbler with any guards/panels removed.

• Whenever ground wires are removed during servicing, these ground wires must be reconnected to ensure that the tumbler is properly grounded.

W002

35. LOADING DOOR ASSEMBLY

Refer to Figure 5. a. Open loading door until door is perpendicular

to machine front.

b. Remove bottom hex head screw from hinge

cam at bottom of door.

c. Remove lower cam assembly by sliding

downward while disengaging setscrew from door hinge.

d. Lift door assembly off top of door hinge lug.

36. LOADING DOOR HANDLE

Refer to Figure 5. a. Open loading door. b. Remove hardware holding door handle to door.

37. LOADING DOOR SWITCH

Refer to Figure 6. a. Open loading door.

Door

b. Remove two screws holding switch cover to

front panel. c. Disconnect wires from door switch. d. Remove switch from cover by removing two

nuts and screws.

NOTE: Switch must be flush to underside of cover at button protrusion and flats of hex nuts must be parallel to cover underside when reassembling.

NOTE: Refer to wiring diagram when rewiring switch.

WARNING

To reduce the risk of serious injury or death, loading door switch MUST be reinstalled after service is completed.

W328

Door

Handle

Hinge

Nut

Door

Switch

30 70276001

TMB1760S

Figure 5

Strike

Washer

TMB1792S

Page 33

Section 5 Service Procedures

WARNING

To reduce the risk of electric shock, fire, explosion, serious injury or death:

• Disconnect electric power to the tumbler before servicing.

• Close gas shut-off valve to gas tumbler before servicing.

• Close steam valve to steam tumbler before servicing.

• Never start the tumbler with any guards/panels removed.

• Whenever ground wires are removed during servicing, these ground wires must be reconnected to ensure that the tumbler is properly grounded.

W002

38. FRONT PANEL

a. Open loading door until door is perpendicular

to machine front.

b. Remove bottom hex head screw from hinge

cam at bottom of door.

c. Remove lower cam assembly by sliding

downward while disengaging setscrew from

door hinge. d. Lift door assembly off top of door hinge lug. e. Remove four screws from top and bottom

surfaces of exterior control box cover and

remove cover, disconnecting control box cover

harness or load ready light wire. Refer to

Figure 3.

f. Remove screw from left and right sides of

control bracket securing control plate. Refer to

Figure 3. g. Pivot plate forward to horizontal. h. Disconnect two plugs from wall of interior

control box and disconnect control box cover

harness (European models only).

i. Remove four screws securing control mounting

bracket to front panel, careful to support control

plate assembly.

j. Pull entire control assembly away from unit.

k. Remove four screws securing front panel to

cabinet frame. Pull front panel forward,

disconnecting door switch harness plug at

upper right corner of front panel to frame. Refer

to Figure 6.

l. Remove two screws holding switch cover to

front panel.

m. Disconnect wires front door switch.

n. Remove two large screws and nuts top and

bottom securing hinge lug to front panel. o. Remove four small screws securing hinge lug

and door switch wire channel to rear of front

panel. p. Remove door latch and door latch securing

screws. Do not discard these components. q. Replace front panel and replace components

removed in steps (l) through (o), but not (p).

r. Place front panel on unit and reattach control

and door assemblies.

s. Remove door strike, door strike nut and door

strike washer. Refer to Figure 5.

t. Close door fully, using a pencil or other sharp

object, mark the axis of the door strike on the front panel loading door entrance wall.

u. Locate door latch vertically centered on mark.

Rear edge of latch should be .062 overlapped over mark.

v. Mark, using a pencil or sharp object, the center

axis of both latch holes. Drill .094-.100 inch diameter. Tap hole 6-32 Class 2A right hand.

w. Reinstall door latch screws.

x. Reinstall door strike hardware, adjusting until

opening force is 8 to 15 pounds applied at center of door handle.

NOTE: Refer to wiring diagram when rewiring lights and switch.

70276001 31

Page 34

Section 5 Service Procedures

Access

Panel

Door Switch

Wire Channel

Door

Latch

Front

Panel

Nut

Door

Switch

Door Switch

Cover

TMB1982P

Door Hinge Lug

Assembly

Figure 6

32 70276001

Page 35

Section 5 Service Procedures

WARNING

To reduce the risk of electric shock, fire, explosion, serious injury or death:

• Disconnect electric power to the tumbler before servicing.

• Close gas shut-off valve to gas tumbler before servicing.

• Close steam valve to steam tumbler before servicing.

• Never start the tumbler with any guards/panels removed.

• Whenever ground wires are removed during servicing, these ground wires must be reconnected to ensure that the tumbler is properly grounded.

W002

39. LOADING DOOR HINGE LUG

Refer to Figure 5. a. Open loading door until door is perpendicular

to machine front.

b. Remove bottom hex head screw from hinge

cam at bottom of door.

c. Remove lower cam assembly by sliding

downward while disengaging setscrew from

door hinge. d. Lift door assembly off top of door hinge lug. e. Remove four screws from top and bottom

surfaces of exterior control box cover and

remove cover, disconnecting control box cover

harness or load ready light wire. Refer to

Figure 3.

f. Remove screw from left and right sides of

control bracket securing control plate. Refer to

Figure 3. g. Pivot plate forward to horizontal. h. Disconnect two plugs from wall of interior

control box and disconnect control box cover

harness (European models only).

i. Remove four screws securing control mounting

bracket to front panel, careful to support control

plate assembly.

j. Pull entire control assembly away from unit.

k. Remove four screws securing front panel to

cabinet frame. Pull front panel forward, disconnecting door switch harness plug at upper right corner of front panel to frame. Refer to Figure 6.

l. Remove two screws holding switch cover to

front panel.

m. Disconnect wires from door switch.

n. Remove two large screws and nuts top and

bottom securing hinge lug to front panel.

o. Remove four small screws securing hinge lug

and door switch wire channel to rear of front panel.

40. THERMISTOR

Refer to Figure 7. a. Remove lint panel. b. Locate thermistor assembly on top of lint hood. c. Remove thermistor bracket mounting screws. d. Disconnect wiring from thermistor terminals. e. Unscrew thermistor from thermistor nut.

NOTE: Refer to wiring diagram when rewiring thermistor.

Thermistor

Bracket

Mounting

Screw

Thermistor

Figure 7

70276001 33

Lint

Screen

TMB1763S

Page 36

Section 5 Service Procedures

WARNING

To reduce the risk of electric shock, fire, explosion, serious injury or death:

• Disconnect electric power to the tumbler before servicing.

• Close gas shut-off valve to gas tumbler before servicing.

• Close steam valve to steam tumbler before servicing.

• Never start the tumbler with any guards/panels removed.

• Whenever ground wires are removed during servicing, these ground wires must be reconnected to ensure that the tumbler is properly grounded.

W002

41. LINT PANEL SWITCH

Refer to Figure 8. a. Remove lint panel.

Lint

Panel

Switch

b. Remove screws from switch cover and remove

cover. Refer to Figure 8.

c. Disconnect wires from switch and remove

switch by depressing locking tabs on switch.

Lint

Panel

Switch

Cover

Attaching

Screws

TMB1575P

Figure 8

34 70276001

Page 37

Section 5 Service Procedures

WARNING

To reduce the risk of electric shock, fire, explosion, serious injury or death:

• Disconnect electric power to the tumbler before servicing.

• Close gas shut-off valve to gas tumbler before servicing.

• Close steam valve to steam tumbler before servicing.

• Never start the tumbler with any guards/panels removed.

• Whenever ground wires are removed during servicing, these ground wires must be reconnected to ensure that the tumbler is properly grounded.

W002

42. GAS VALVE

a. Remove four screws holding access panel to

cabinet.

b. Lift access panel off top edge of front panel and

pull panel forward. c. Close gas shut-off valve. Refer to Figure 9. d. Disconnect all wires from gas valve terminals

and disconnect gas valve pipe unions. e. Remove screws holding gas valve and bracket

to stove assembly.

f. Remove gas valve from mounting bracket.

IMPORTANT: When reinstalling gas valve, purge air and sediment from the gas service line before connecting it loosely to the tumbler. Purge remaining air until odor of gas is detected, then tighten connection. Use pipe compound resistant to action of Liquid Petroleum Gas (L.P.) gas on all pipe threads.

WARNING

To reduce risk of fire or explosion, check pipe connections for gas leaks with a noncorrosive leak detection fluid. Do not use an open flame to check for gas leaks!

W310

44. IGNITION CONTROL

a. Remove four screws holding access panel to

cabinet. Refer to Figure 1.

b. Lift access panel off top edge of front panel and

pull panel forward. Refer to Figure 1.

c. Remove interior control box cover. Refer to

Figure 2.

d. Locate ignition control on rear wall of interior

control box and disconnect wiring to ignition control.

e. Remove two screws securing ignition control to

interior control box.

NOTE: Refer to wiring diagram when rewiring ignition control.

45. BURNER TUBE

a. Remove four screws holding access panel to

cabinet.

b. Lift access panel off top edge of front panel and

pull panel forward. c. Close gas shut-off valve. Refer to Figure 9. d. Disconnect union nut attaching nipple to

spudholder and remove spudholder. Refer to

Figure 9. e. Remove screws holding burner tubes to stove

front and remove burner tubes.

NOTE: Refer to wiring diagram when rewiring gas valve.

43. IGNITER

Refer to Figure 9. a. Remove four screws holding access panel to

cabinet.

b. Lift access panel off top edge of front panel and

pull panel forward. c. Disconnect high voltage lead from igniter. d. Remove two screws attaching igniter bracket to

When reinstalling spudholder, use noncorrosive leak detection fluid to check all pipe connections for gas leaks. DO NOT USE AN OPEN FLAME TO CHECK FOR GAS LEAKS! Make sure that spudholder and orifices are positioned such that gas will be injected directly down the center of the burner.

WARNING

W269R1

burner tube.

70276001 35

Page 38

Section 5 Service Procedures

WARNING

To reduce the risk of electric shock, fire, explosion, serious injury or death:

• Disconnect electric power to the tumbler before servicing.

• Close gas shut-off valve to gas tumbler before servicing.

• Close steam valve to steam tumbler before servicing.

• Never start the tumbler with any guards/panels removed.

• Whenever ground wires are removed during servicing, these ground wires must be reconnected to ensure that the tumbler is properly grounded.

Stove

High Limit

Thermostat

W002

Thermostat

Attaching

Screws

Gas Valve

Bracket

Shut-off

Valve

Gas

Valve

Union

Nut

Igniter

46. STOVE HIGH LIMIT THERMOSTAT

(Gas Models) a. Remove four screws holding access panel to

cabinet.

b. Lift access panel off top edge of front panel and

pull panel forward.

c. Remove two screws holding thermostat cover

to stove. Refer to Figure 9. d. Remove thermostat cover. Refer to Figure 9. e. Disconnect wires to thermostat.

f. Remove the two thermostat attaching screws.

Refer to Figure 9. g. Remove thermostat.

Thermostat

Cover

Spudholder

TMB1737P

Figure 9

47. CABINET HIGH LIMIT THERMOSTAT/ LOAD READY THERMOSTAT

(Located on rear of tumbler near fan.) a. Support drive guard cover and remove screws

holding guard to rear of tumbler. Refer to

Figure 11. b. Disconnect wires from thermostat. c. Remove two screws holding thermostat to rear

of tumbler. Refer to Figure 9.

36 70276001

Page 39

Section 5 Service Procedures

WARNING

To reduce the risk of electric shock, fire, explosion, serious injury or death:

• Disconnect electric power to the tumbler before servicing.

• Close gas shut-off valve to gas tumbler before servicing.

• Close steam valve to steam tumbler before servicing.

• Never start the tumbler with any guards/panels removed.

• Whenever ground wires are removed during servicing, these ground wires must be reconnected to ensure that the tumbler is properly grounded.

48. STEAM COILS

Refer to Figure 10. a. Shut off inlet and outlet valves and disconnect

flex hoses from steam coils

b. Remove screws holding cover to top of steam

heating unit and remove cover. c. Remove air filters. d. Remove screws holding steam coils to coil

frame. e. Remove screws from damper.

f. Remove steam coils by lifting straight up and

out of tumbler.

W002

NOTE: When removing or replacing steam coils, be careful not to damage fins on steam coils.

70276001 37

Page 40

Section 5 Service Procedures

Steam Heating

Unit Cover

Damper

Air

Filter

Steam

Coils

TMB1585P

Figure 10

38 70276001

Page 41

Section 5 Service Procedures

WARNING

To reduce the risk of electric shock, fire, explosion, serious injury or death:

• Disconnect electric power to the tumbler before servicing.

• Close gas shut-off valve to gas tumbler before servicing.

• Close steam valve to steam tumbler before servicing.

• Never start the tumbler with any guards/panels removed.

• Whenever ground wires are removed during servicing, these ground wires must be reconnected to ensure that the tumbler is properly grounded.

W002

49. DRIVE GUARD COVER

a. Support drive guard cover and remove screws

that hold guard to rear of tumbler. Refer to Figure 11.

Drive

Guard

Side

Drive

Guard

Top

b. Reinstall drive guard.

Drive Guard

Attaching

Screw

Drive Guard Cover

Drive

Guard

Side

Drive

Guard

Bottom

TMB1849S

Figure 11

70276001 39

Page 42

Section 5 Service Procedures

WARNING

To reduce the risk of electric shock, fire, explosion, serious injury or death:

• Disconnect electric power to the tumbler before servicing.

• Close gas shut-off valve to gas tumbler before servicing.

• Close steam valve to steam tumbler before servicing.

• Never start the tumbler with any guards/panels removed.

• Whenever ground wires are removed during servicing, these ground wires must be reconnected to ensure that the tumbler is properly grounded.

W002

50. AIRFLOW SWITCH

(Located on upper rear center of tumbler.) Refer to Figure 12.

a. Support drive guard cover and remove screws

that hold guard to rear of tumbler. Refer to Figure 11.

b. Remove screws holding airflow switch cover to

back of tumbler.

c. Disconnect wires from switch.

NOTE: Refer to wiring diagram when rewiring airflow switch.

d. Remove screw(s) that hold switch and

mounting bracket to tumbler.

e. Remove two screws and nut that hold switch to

mounting bracket.

NOTE: After reinstalling airflow switch and mounting bracket into switch box, adjust switch.

51. CYLINDER BELT

Refer to Figure 14. a. Support drive guard cover and remove screws

that hold guard to rear of tumbler. Refer to Figure 11.

b. Loosen the four jackshaft assembly attaching

nuts. Refer to Figure 13.

c. Rotate the adjusting nuts counterclockwise

(approximately three turns). Refer to Figure 13.

d. Slide jackshaft assembly upwards to loosen the

cylinder belt.

e. Remove cylinder belts.

NOTE: After reinstalling belt, adjust drive belt and cylinder belt. Install new belts as a set of 3.

NOTE: Proper tensions for new belts are 45-55 pounds for the motor belt, 55-65 pounds for the final drive, 60-65 pounds for 120 pound blower, and 75-80 pounds for 170 pound blower measured with a Borroughs Belt Tension Gauge. Using a Browning Belt Tension Gauge, the motor belt deflection should be 5/16 inch at five pounds pressure, and final drive belt deflection should be 1/4 inch at five pounds pressure.

Airflow Switch

Screws

Mounting

Bracket

Switch

Cotter

Vane

TMB2061P

Figure 12

40 70276001

Nut

Page 43

Section 5 Service Procedures

WARNING

To reduce the risk of electric shock, fire, explosion, serious injury or death:

• Disconnect electric power to the tumbler before servicing.

• Close gas shut-off valve to gas tumbler before servicing.

• Close steam valve to steam tumbler before servicing.

• Never start the tumbler with any guards/panels removed.

• Whenever ground wires are removed during servicing, these ground wires must be reconnected to ensure that the tumbler is properly grounded.

Attaching

Bolts

Jackshaft

Eye Bolt

W002

Adjusting

Nuts

Jackshaft Assembly

Cabinet

High Limit

Thermostat

Figure 13

52. DRIVE BELT

Refer to Figure 14. a. Support drive guard cover and remove screws

holding guard to rear of tumbler. Refer to Figure 11.

b. Loosen the four jackshaft assembly attaching

nuts. Refer to Figure 13.

c. Rotate the adjusting nuts counterclockwise

(approximately three turns).

d. Slide jackshaft assembly upwards to loosen the

cylinder belts.

e. Remove cylinder belts.

f. Remove drive belt.

NOTE: After reinstalling drive belt, adjust cylinder belts then drive belt.

Jackshaft

Eye Bolt

Load Ready

Thermostat

T316PE3B

53. STEP PULLEY ASSEMBLY

Refer to Figure 14. a. Support drive guard cover and remove screws

holding guard to rear of tumbler. Refer to

Figure 11. b. Remove cylinder belts and drive belts. c. Remove snap ring and pull step pulley off of

jackshaft.

Refer to Tab le 1 on page 42 for critical torques.

NOTE: Belt tension from step pulley to cylinder shaft pulley can be measured to ensure proper installation in one of the following ways:

• Burroughs Belt Tension Gauge initial reading 70-80 pounds.

• Force to deflect belt .38 inch at midspan with initial tensioning 6.5 pounds.

• Burroughs Belt Tension Gauge reading after run 55-65 pounds.

70276001 41

Page 44

Section 5 Service Procedures

WARNING

To reduce the risk of electric shock, fire, explosion, serious injury or death:

• Disconnect electric power to the tumbler before servicing.

• Close gas shut-off valve to gas tumbler before servicing.

• Close steam valve to steam tumbler before servicing.

• Never start the tumbler with any guards/panels removed.

• Whenever ground wires are removed during servicing, these ground wires must be reconnected to ensure that the tumbler is properly grounded.

Critical Torques

W002

Location (With nut threading)

Measurement in

Inch Pounds

Measurement in

Foot Pounds

Front cylinder shaft bearing to frame nut (1/2 – 13) 600 ± 60 50 ± 5 Rear cylinder shaft bearing to bearing plate nut (1/2 – 13) 600 ± 60 50 ± 5 Cylinder drive motor pulley bushing cap screw to cylinder

drive motor pulley (10-24) Cylinder drive motor pulley bushing set screw to cylinder

drive motor shaft (10-24) Cylinder shaft pulley (25.00 O.D.) QD bushing cap screw to

cylinder pulley (3/8-16) Cylinder shaft pulley (25.00 O.D.) QD bushing set screw to

cylinder shaft (1/4-20)

46 ± 5

28 ± 3

400 ± 40 33 ± 3

68 ± 7

Fan bushing cap screw to fan (10-24) 46 ± 5 Fan bushing set screw to motor shaft (10-24) 28 ± 3 50 Hz fan motor pulley bushing cap screw to 50 Hz fan

(10-24) 50 Hz fan motor pulley bushing set screw to 50 Hz fan motor

shaft (10-24)

46 ± 5

28 ± 3

50 Hz fan pulley bushing cap screw to 50 Hz fan (10-24) 46 ± 5 50 Hz fan pulley bushing set screw to 50 Hz fan shaft

(10-24)

Table 1

42 70276001

28 ± 3

Page 45

Section 5 Service Procedures

WARNING

To reduce the risk of electric shock, fire, explosion, serious injury or death:

• Disconnect electric power to the tumbler before servicing.

• Close gas shut-off valve to gas tumbler before servicing.

• Close steam valve to steam tumbler before servicing.

• Never start the tumbler with any guards/panels removed.

• Whenever ground wires are removed during servicing, these ground wires must be reconnected to ensure that the tumbler is properly grounded.

W002

54. CYLINDER SHEAVE

Refer to Figure 14. a. Support drive guard cover and remove screws

holding guard to rear of tumbler. Refer to Figure 11.

b. Loosen the four jackshaft assembly attaching

nuts. Refer to Figure 13.

c. Rotate the adjusting nuts counterclockwise

(approximately three turns).

Cylinder

Sheave

Setscrew

d. Slide jackshaft assembly upwards to loosen the

cylinder belts.

e. Remove cylinder belts.

f. Remove bushing setscrew. Refer to Figure 14. g. Remove screws from tapered bushing. h. Remove tapered bushing by putting the screws

removed in step “g” into the threaded holes in the bushing. Turning the screws inward will force the bushing out of the cylinder sheave.

i. Remove cylinder sheave.

Cylinder

Belt

Bolt

Drive

Belt

Nut

Tapered Bushing

Snap

Ring

70276001 43

Step

Pulley

Figure 14

Jackshaft Assembly

TMB1784S

Page 46

Section 5 Service Procedures

WARNING

To reduce the risk of electric shock, fire, explosion, serious injury or death:

• Disconnect electric power to the tumbler before servicing.

• Close gas shut-off valve to gas tumbler before servicing.

• Close steam valve to steam tumbler before servicing.

• Never start the tumbler with any guards/panels removed.

• Whenever ground wires are removed during servicing, these ground wires must be reconnected to ensure that the tumbler is properly grounded.

55. MOTOR PULLEY

Refer to Figure 15. a. Remove drive guard cover. b. Remove drive belt. Refer to Figure 14. c. Loosen setscrews and remove screws from

tapered bushing.

d. Remove tapered bushing by putting the screws

removed in step “b” into the threaded holes in the bushing. Turn the screws inward to force the bushing out of the motor pulley.

e. Remove motor pulley.

Setscrew

W002

Refer to Table 1 on page 42 for critical torques.

NOTE: Belt tension from cylinder drive motor pulley to step pulley can be measured to ensure proper installation in one of the following ways:

• Burroughs Belt Tension Gauge initial reading 6070 pounds.

• Force to deflect belt .38 inch at midspan with initial tensioning 6.0 pounds

• Burroughs Belt Tension Gauge reading after run 45-55 pounds.

NOTE: Realign motor pulley directly over sheave by loosening the tapered bushing and repositioning the motor pulley on the cylinder motor shaft.

56. JACKSHAFT ASSEMBLY

Refer to Figure 13. a. Support drive guard cover and remove screws

that hold guard to rear of tumbler. Refer to

Figure 11. b. Remove cylinder and drive belts. c. Remove snap ring and pull step pulley off of

jackshaft. d. Remove four bolts that attach jackshaft to rear

of tumbler.

NOTE: After installing sheave, adjust belts.

57. CYLINDER ASSEMBLY

a. Remove front panel assembly. b. Support drive guard cover and remove screws

holding guard to rear of tumbler. Refer to

Figure 11.

Screws

Tapered Bushing

Figure 15

Motor

Pulley

T371PE1B

c. Loosen the four jackshaft assembly attaching

nuts. Refer to Figure 13.

d. Rotate the adjusting nuts counterclockwise

(approximately three turns).

e. Slide jackshaft assembly upwards to loosen the

cylinder belts.

f. Remove cylinder belts. g. Remove drive belt. Refer to Figure 14. h. Remove screws from tapered bushing. Refer to

Figure 15.

i. Remove tapered bushing by putting the screws

removed in step “h” into the threaded holes in the bushing. Turning the screws inward will force the bushing out of the cylinder sheave.

j. Remove cylinder sheave. k. Loosen setscrews on trunnion bearings. Refer

to Figure 16.

l. Pull cylinder through front of cabinet.

NOTE: After reinstalling drive and cylinder belts, adjust belts.

NOTE: Do not allow cylinder to rest on cabinet frame. Support cylinder vertically as it is removed from cabinet frame.

44 70276001

Page 47

Section 5 Service Procedures

WARNING

To reduce the risk of electric shock, fire, explosion, serious injury or death:

• Disconnect electric power to the tumbler before servicing.

• Close gas shut-off valve to gas tumbler before servicing.

• Close steam valve to steam tumbler before servicing.

• Never start the tumbler with any guards/panels removed.

• Whenever ground wires are removed during servicing, these ground wires must be reconnected to ensure that the tumbler is properly grounded.

W002

58. TRUNNION BEARINGS

Refer to Figure 16. a. Remove belt guard. b. Remove front panel assembly. c. Place blocks under cylinder left and right of

center so that cylinder will stay level while

trunnion bearings are being replaced. d. Remove cylinder sheave. e. Loosen the front and rear adjusting screws.

Rear

Adjusting

Screw

Mounting

Bracket

Rear

Bearing

Setscrews

f. Loosen setscrews holding bearings to shaft. g. Remove bearing mounting screws. h. Remove rear bearing.

i. Remove screws that hold mounting bracket to

tumbler.

j. Remove mounting bracket. k. Remove front bearing mounting nuts.

l. Loosen setscrews holding bearing to shaft.

m. Remove front bearing.

Front Bearing

Setscrews

Bearing

Mounting

Screw

Front

Bearing

Rear

Bearing

Assembly

Mounting Bracket

Attaching

Screw

Assembly

Shim

Front

Adjusting

Screw

TMB1984P

Figure 16

70276001 45

Page 48

Section 5 Service Procedures

WARNING

To reduce the risk of electric shock, fire, explosion, serious injury or death:

• Disconnect electric power to the tumbler before servicing.

• Close gas shut-off valve to gas tumbler before servicing.

• Close steam valve to steam tumbler before servicing.

• Never start the tumbler with any guards/panels removed.

• Whenever ground wires are removed during servicing, these ground wires must be reconnected to ensure that the tumbler is properly grounded.

W002

59. FAN MOTOR DRIVE AND FAN ASSEMBLY

a. Remove drive guard cover. b. Disconnect wires from fan motor. c. Remove attaching nuts and screws. Refer to

Figure 17.

d. Pull fan motor and fan assembly out of tumbler.

NOTE: Refer to wiring diagram when rewiring motor.

60. FAN (60 Hertz Models)

a. Disconnect wires from fan motor. b. Remove attaching nuts and screws. Refer to

Figure 17. c. Pull motor and fan assembly out of tumbler. d. Remove screws that hold tapered bushing to fan

and remove tapered bushing. e. Remove tapered bushing by putting the screws

removed in step “d” into the threaded holes in

the bushing. Turning the screws inward will

force the bushing off of the fan.

f. Remove bushing setscrew. Remove bushing

from motor shaft. g. Remove fan from motor shaft.

Refer to Table 1 on page 42 for critical torques.

NOTE: Refer to wiring diagram when rewiring motor.

Bushing

Fan

Motor

Attaching

Screw

Attaching

Nut

Fan

60 HERTZ MODELS

Figure 17

61. FAN (50 HERTZ MODELS)

Refer to Figure 18. a. Remove drive guard cover. b. Loosen fan motor eyebolt nuts. c. Remove fan belt. d. Remove four nuts securing fan bearing

assembly to rear panel of frame and remove fan bearing assembly and fan.

e. Remove screws that hold tapered bushing to fan

and remove tapered bushing.

f. Remove tapered bushing by putting the screws

removed in step “d” into the threaded holes in the bushing. Turning the screws inward will force the bushing off of the fan.

g. Remove bushing setscrew. Remove bushing

from motor shaft.

h. Remove fan from motor shaft.

T319PE1B

Refer to Tab le 1 on page 42 for critical torques.

46 70276001

Page 49

Section 5 Service Procedures

Fan

Motor

End Rod

Eyebolt

Fan

Belt

Fan

Bearing

Nut

Eyebolt

Nuts

TMB1581P

50 HERTZ MODELS

Figure 18

70276001 47

Page 50

Section 5 Service Procedures

WARNING

To reduce the risk of electric shock, fire, explosion, serious injury or death:

• Disconnect electric power to the tumbler before servicing.

• Close gas shut-off valve to gas tumbler before servicing.

• Close steam valve to steam tumbler before servicing.

• Never start the tumbler with any guards/panels removed.

• Whenever ground wires are removed during servicing, these ground wires must be reconnected to ensure that the tumbler is properly grounded.

W002

62. TRUNNION SHAFT ASSEMBLY

Refer to Figure 19. a. Remove cylinder assembly. b. Remove the four washers and eight nuts

holding trunnion shaft assembly to rear of cylinder.

Tape

Measure

IMPORTANT: When installing trunnion assembly on cylinder, the cylinder and shaft must be aligned. Refer to Figure 19. Measure the distance between the center of the trunnion shaft and the outer rim of the cylinder at the four points shown. If any measurement is less than the largest, place spacer(s) between trunnion arm and cylinder back until all measurements are equal.

Trunnion

Shaft

MEASURE AT

FOUR POINTS

Trunnion

Arm

Cylinder

TMB1785S

Figure 19

48 70276001

Page 51

Section 5 Service Procedures

WARNING

To reduce the risk of electric shock, fire, explosion, serious injury or death:

• Disconnect electric power to the tumbler before servicing.

• Close gas shut-off valve to gas tumbler before servicing.

• Close steam valve to steam tumbler before servicing.

• Never start the tumbler with any guards/panels removed.

• Whenever ground wires are removed during servicing, these ground wires must be reconnected to ensure that the tumbler is properly grounded.

W002

63. CYLINDER DRIVE MOTOR

Refer to Figure 20. a. Support drive guard cover and remove screws

that hold guard to rear of tumbler. Refer to

Figure 11. b. Remove drive belt. Refer to Figure 14. c. Mark location of motor on the motor mounting

bracket and remove screws and nuts holding

motor to mounting bracket. Refer to Figure 20.

Motor Pulley

Motor

d. Disconnect wire harness from motor. e. Remove motor pulley.

f. After installing motor, adjust drive belt tension.

Refer to Tab le 1 on page 42 for critical torques.

NOTE: Refer to wiring diagram when rewiring the motor.

Attaching

Screw

Mounting

Bracket

Attaching

Nut

TMB1986P

Figure 20

70276001 49

Page 52

Section 5 Service Procedures

WARNING

To reduce the risk of electric shock, fire, explosion, serious injury or death:

• Disconnect electric power to the tumbler before servicing.

• Close gas shut-off valve to gas tumbler before servicing.

• Close steam valve to steam tumbler before servicing.

• Never start the tumbler with any guards/panels removed.

• Whenever ground wires are removed during servicing, these ground wires must be reconnected to ensure that the tumbler is properly grounded.

W002

64. REVERSING TIMER

(Manual Timer Models) Refer to Figure 21.

NOTE: All reversing electrical components except the reversing/nonreversing switch are located in the contactor box on the rear of the tumbler. The reversing/nonreversing switch is mounted on the exterior control box for manual timer models.

a. Remove two attaching screws and cover from

contactor box.

b. Disconnect wires from reversing timer.

NOTE: Refer to wiring diagram when rewiring timer motor and switches.

c. Remove two screws holding reversing timer to

back wall of contactor box.

d. Remove reversing timer.

65. REVERSING CONTACTOR

Refer to Figure 21. a. Remove two attaching screws and cover from

contactor box.

b. Disconnect wires from contactor coil terminals.

66. FAN MOTOR CONTACTOR

Refer to Figure 21. a. Remove two attaching screws and cover from

contactor box.

b. Disconnect wires from contactor terminals.

NOTE: Refer to wiring diagram when rewiring fan motor contactor.

c. Remove two screws holding din rail to back

wall of junction box.

d. Slide contactor off of din rail.

67. TRANSFORMER

Refer to Figure 21. a. Remove attaching screws and cover from

contactor box.

b. Disconnect leads from transformer terminals.

NOTE: Refer to wiring diagram when rewiring transformer.

c. Remove back guard. d. Remove four screws and nuts holding

transformer to back wall of contactor box.

e. Remove transformer.

NOTE: Refer to wiring diagram when rewiring reversing contactor.

c. Remove screws holding reversing contactor to

back wall of contactor box.

d. Remove reversing contactor.

50 70276001

Page 53

Terminal

Block

Section 5 Service Procedures

Contactor Box

Fuseholder

Fuse

Reversing

Timer

Transformer

Terminal

Strip

L1 L2 L3

SECURE GROUND

WIRE TO

GROUND SCR

Reversing Contactor

Fan Motor

TMB1762S

Contactor

Figure 21

70276001 51

Page 54

Section 5 Service Procedures

Notes

52 70276001

Page 55

Section 6

Adjustments

WARNING

To reduce the risk of electric shock, fire, explosion, serious injury or death:

• Disconnect electric power to the tumbler before servicing.

• Close gas shut-off valve to gas tumbler before servicing.

• Close steam valve to steam tumbler before servicing.

• Never start the tumbler with any guards/panels removed.

• Whenever ground wires are removed during servicing, these ground wires must be reconnected to ensure that the tumbler is properly grounded.

68. LEVELING

NOTE: It is recommended that the front of the tumbler be kept slightly higher than the rear (approximately 1/8 inch, 3.0 mm). This will prevent the clothes, while tumbling, from wearing on the door glass gasket.

a. Check the front to rear level by rotating the

clothes cylinder until one of the cylinder ribs is at the bottom. Place a level on the rib.

b. Check the side to side level by placing a level

on access panel top and rear frame top angle.

W002

70276001 53

Page 56

Section 6 Adjustments

WARNING

To reduce the risk of electric shock, fire, explosion, serious injury or death:

• Disconnect electric power to the tumbler before servicing.

• Close gas shut-off valve to gas tumbler before servicing.

• Close steam valve to steam tumbler before servicing.

• Never start the tumbler with any guards/panels removed.

• Whenever ground wires are removed during servicing, these ground wires must be reconnected to ensure that the tumbler is properly grounded.

W002

69. MAIN GAS BURNER AIR INLET SHUTTERS

(All Gas Models) Refer to Figure 22.

CAUTION

The air inlet shutters on the burner must be adjusted so sufficient primary air is metered into the system for proper combustion and maximum efficiency. Before adjusting the inlet shutter be sure that all lint is removed from lint compartment and lint screen.

Air inlet shutter adjustments will vary from location to location and will depend on the vent system, number of units installed, make-up air and line gas pressure. Opening the shutter increases the amount of primary air supplied to the burner while closing the shutter decreases the air supply. Adjust the air shutter as follows:

W281

a. Remove access panel. b. Start tumbler and check the flame pattern.

Correct air and gas mixture is indicated if the flame pattern is primarily blue, with small yellow tips, and bends to the left of the heater section. Too little air is indicated if the flame is yellow, lazy and smokey.

c. To adjust the air inlet shutter, loosen locking

screw.

d. Slide shutter in or out as necessary to obtain

desired flame intensity.

e. After shutter is adjusted, tighten locking screw

securely.

f. If the flame pattern is straight up, insufficient

air is flowing through the tumbler. A flame pattern that flares to the right and left indicates that no air is flowing through the tumbler.

INSUFFICIENT AIRFLOW

Air Shutter

Adjusting Screw

T197SE3C

PROPER AIRFLOW

Air Shutter

Adjusting Screw

T196SE3C

NO AIRFLOW

Air Shutter

Adjusting Screw

T195SE3C

Figure 22

54 70276001

Page 57

Section 6 Adjustments

WARNING

To reduce the risk of electric shock, fire, explosion, serious injury or death:

• Disconnect electric power to the tumbler before servicing.

• Close gas shut-off valve to gas tumbler before servicing.

• Close steam valve to steam tumbler before servicing.

• Never start the tumbler with any guards/panels removed.

• Whenever ground wires are removed during servicing, these ground wires must be reconnected to ensure that the tumbler is properly grounded.

W002

70. AIRFLOW SWITCH

The airflow switch is set at the factory for proper operation. No adjustment necessary. Refer to Figure 23.

IMPORTANT: Airflow switch vane must remain closed during operation. If it opens and closes during the drying cycle, this indicates insufficient airflow through the tumbler. If switch remains open, or pops open and closed during the cycle, the heating system will shut off. The cylinder and fan will continue to operate even though the airflow switch is indicating insufficient airflow.

Airflow

Switch

71. LOADING DOOR STRIKE

Refer to Figure 24. The door strike must be adjusted so it has sufficient tension to hold loading door closed against the force of a tumbling load. The door strike is properly adjusted when 8-15 lbs. (17.6-33 kg) of pull is required to open door.

To adjust, open door, loosen nut and turn door strike screw in for less tension or out for more tension. Tighten nut. Refer to Figure 24.

Door

Strike

Door

Latch

T283I

T283i

Figure 23

70276001 55

Figure 24

T048I

Page 58

Section 6 Adjustments

WARNING

To reduce the risk of electric shock, fire, explosion, serious injury or death:

• Disconnect electric power to the tumbler before servicing.

• Close gas shut-off valve to gas tumbler before servicing.

• Close steam valve to steam tumbler before servicing.

• Never start the tumbler with any guards/panels removed.

• Whenever ground wires are removed during servicing, these ground wires must be reconnected to ensure that the tumbler is properly grounded.

Motor

Bracket

Pivot Screw

Side

Bracket

W002

Motor

Mounting

Bracket

Adjusting

Nuts

Adjusting

Tube

TMB1986P

Figure 25

72. CYLINDER BELT

a. Support drive guard cover and remove screws

that hold guard to rear of tumbler. Refer to

NOTE: Belt tension from step pulley to cylinder shaft pulley can be measured to ensure proper installation in one of the following ways:

• Burroughs Belt Tension Gauge initial reading 70-80 pounds.

• Force to deflect belt .38 inch at midspan with initial tensioning 6.5 pounds.

• Burroughs Belt Tension Gauge reading after run

Figure 11.

b. Loosen the four jackshaft assembly attaching

screws. Refer to Figure 26.

c. Loosen adjusting nuts on outer eyebolt and

rotate bottom nut clockwise until proper

tension is reached. Refer to Figure 13. d. Retighten all nuts and screws. e. Readjust drive belt.

55-65 pounds.

56 70276001

Page 59

Section 6 Adjustments

WARNING

To reduce the risk of electric shock, fire, explosion, serious injury or death:

• Disconnect electric power to the tumbler before servicing.

• Close gas shut-off valve to gas tumbler before servicing.

• Close steam valve to steam tumbler before servicing.

• Never start the tumbler with any guards/panels removed.

• Whenever ground wires are removed during servicing, these ground wires must be reconnected to ensure that the tumbler is properly grounded.

W002

IMPORTANT: Adjusting the cylinder belt tension WILL AFFECT the drive belt tension. You MUST check and readjust the drive belt tension after adjusting the cylinder belt tension.

Jackshaft Assembly Attaching

Screws

Jackshaft

Assembly

T317PE1B_

Figure 26

CYLINDER CLEARANCE

The clearance between the cylinder rim and front panel must be adjusted so the cylinder is centered within the front panel opening when the cylinder is fully loaded and is turning. However, the adjustment should be made when the cylinder is empty.

NOTE: If the cylinder is not properly adjusted, the cylinder rim will rub against the front panel.

a. Open loading door. b. Check the gap between the center of the front

panel top flange and the cylinder rim. Proper adjustment is when the gap is 8/32 inch ± 3/32 inch. Refer to Figure 27. Perform steps d through i to adjust the cylinder rim/front panel flange clearance.

c. Check the cylinder fore/aft clearance between

the inside front of the cylinder and the edge of the front panel flange. Proper adjustment is when the gap is 9/32 inch ± 1/32 inch. Refer to Figure 27. Perform steps j through n to adjust the cylinder fore/aft clearance.

CYLINDER RIM/FRONT PANEL FLANGE CLEARANCE ADJUSTMENT

a. Support corner drive guard and remove screws

holding corner guard to rear of tumbler.

b. Support drive guard cover and remove screws

holding guard to rear of tumbler.

c. Loosen rear bearing mounting screws. Refer to

Figure 28

d. Loosen the locknuts on rear adjustment screws.

Refer to Figure 28.

e. Turn the adjusting screws in or out as necessary

to obtain proper clearance between cylinder rim and front panel.

NOTE: Turning the adjusting screws clockwise will raise the cylinder and turning them counterclockwise will lower the cylinder. Turn both screws evenly to adjust top and bottom clearance. Turn one or the other adjusting screw in or out to adjust side clearance.

f. After the cylinder is properly adjusted, tighten

the adjusting screw locknuts and the rear bearing mounting screws.

g. Install drive guard cover. Refer to

Paragraph 49.

NOTE: If adjusting the trunnion housing fails to correct the clearance, the problem is probably due to a worn trunnion shaft or defective bearings.

70276001 57

Page 60

Section 6 Adjustments

WARNING

To reduce the risk of electric shock, fire, explosion, serious injury or death:

• Disconnect electric power to the tumbler before servicing.

• Close gas shut-off valve to gas tumbler before servicing.

• Close steam valve to steam tumbler before servicing.

• Never start the tumbler with any guards/panels removed.

• Whenever ground wires are removed during servicing, these ground wires must be reconnected to ensure that the tumbler is properly grounded.

W002

CYLINDER FORE/AFT CLEARANCE ADJUSTMENT

h. Support corner drive guard and remove screws

holding corner guard to rear of tumbler.

i. Support drive guard cover and remove screws

holding guard to rear of tumbler.

j. Loosen setscrews in the front bearing assembly

collar and rear bearing assembly collar. Refer to Figure 28.

Cylinder

Rim

k. Move cylinder assembly in or out as necessary

to obtain proper clearance between the cylinder and the front panel.

l. After the cylinder is properly adjusted, tighten

setscrews in the front and rear bearing assembly collars.

m. Install drive guard cover. Refer to

Paragraph 49.

Inside Front

of Cylinder

8/32" ± 3/32"

9/32" ± 1/32"

Front Panel

Flange

(Top Shown)

Figure 27

58 70276001

Fore / Aft

Clearance

Cylinder Rim /

Front Panel Flange

Clearance

TMB1786S

Page 61

Section 6 Adjustments

WARNING

To reduce the risk of electric shock, fire, explosion, serious injury or death:

• Disconnect electric power to the tumbler before servicing.

• Close gas shut-off valve to gas tumbler before servicing.

• Close steam valve to steam tumbler before servicing.

• Never start the tumbler with any guards/panels removed.

• Whenever ground wires are removed during servicing, these ground wires must be reconnected to ensure that the tumbler is properly grounded.

REAR

BEARING MOUNTING

SCREW

REAR

ADJUSTING

SCREW

W002

REAR

BEARING ASSEMBLY

COLLAR

Figure 28

73. DRIVE BELT TENSION

NOTE: Belt tension from cylinder drive motor pulley to step pulley can be measured to ensure proper installation in one of the following ways:

• Burroughs Belt Tension Gauge initial reading 6070 pounds.

• Force to deflect belt .38 inch at midspan with initial tensioning 6.0 pounds

• Burroughs Belt Tension Gauge reading after run 45-55 pounds.

FRONT

ADJUSTING

SCREW

TMB1787S

FRONT

BEARING ASSEMBLY

COLLAR

a. Support drive guard cover and remove screws

holding guard to rear of tumbler. Refer to Figure 11.

b. Loosen the two motor bracket pivot screws.

Refer to Figure 25.

c. Turn the adjusting nuts clockwise until proper

tension is reached. Refer to Figure 25.

d. Retighten all nuts and screws.

70276001 59

Page 62

Section 6 Adjustments

WARNING

To reduce the risk of electric shock, fire, explosion, serious injury or death:

• Disconnect electric power to the tumbler before servicing.

• Close gas shut-off valve to gas tumbler before servicing.

• Close steam valve to steam tumbler before servicing.

• Never start the tumbler with any guards/panels removed.

• Whenever ground wires are removed during servicing, these ground wires must be reconnected to ensure that the tumbler is properly grounded.

74. FAN BELT TENSION

a. Support corner drive guard and remove screws

holding corner guard to rear of tumbler.

b. Support drive guard cover and remove screws

holding guard to rear of tumbler.

c. Loosen the two mounting bracket attaching

screws.

d. Raise or lower eye bolt until proper tension is

reached.

e. Retighten all nuts and screws.

W002

NOTE: Belt tension from fan motor pulley to fan shaft pulley can be measured to ensure proper installation in one of the following ways:

• Burroughs Belt Tension Gauge initial reading 6070 pounds.

• Force to deflect belt .38 inch at midspan with initial tensioning 7.0 pounds

• Burroughs Belt Tension Gauge reading after run 50-55 pounds.

60 70276001

Page 63

Section 7

Wiring Schematics

WARNING

Failure to install, maintain, and/or operate this machine according to the manufacturer's instructions may result in conditions which can produce bodily injury and/or property damage.

WIRING DIAGRAMS AND SCHEMATICS

FOUND ON THE FOLLOWING PAGES

ARE FOR MODELS COVERED IN THIS MANUAL.

W030

70276001 61

Page 64

Section 7 Wiring Schematics

WARNING

Failure to install, maintain, and/or operate this machine according to the manufacturer's instructions may result in conditions which can produce bodily injury and/or property damage.

W030

AT, HT, PT, ST, UT, WT AND XT MANUAL TIMER MODELS

208-230 VAC, 60 HERTZ, 3 PHASE GAS TUMBLER

62 70276001

Page 65

Section 7 Wiring Schematics

WARNING

Failure to install, maintain, and/or operate this machine according to the manufacturer's instructions may result in conditions which can produce bodily injury and/or property damage.

W030

AT, HT, PT, ST, UT, WT AND XT MANUAL TIMER MODELS

380-415 VAC, 50 HERTZ, 3 PHASE GAS TUMBLER

70276001 63

Page 66

Section 7 Wiring Schematics

WARNING

Failure to install, maintain, and/or operate this machine according to the manufacturer's instructions may result in conditions which can produce bodily injury and/or property damage.

W030

AT, HT, PT, ST, UT, WT AND XT MANUAL TIMER MODELS

460 VAC, 60 HERTZ, 3 PHASE GAS TUMBLER

64 70276001

Page 67

Section 7 Wiring Schematics

WARNING

Failure to install, maintain, and/or operate this machine according to the manufacturer's instructions may result in conditions which can produce bodily injury and/or property damage.

W030

AT, HT, PT, ST, UT, WT AND XT MANUAL TIMER MODELS

208-230 VAC, 60 HERTZ, 3 PHASE STEAM TUMBLER

70276001 65

Page 68

Section 7 Wiring Schematics

WARNING

Failure to install, maintain, and/or operate this machine according to the manufacturer's instructions may result in conditions which can produce bodily injury and/or property damage.

W030

AT, HT, PT, ST, UT, WT AND XT MANUAL TIMER MODELS

380-415 VAC, 50 HERTZ, 3 PHASE STEAM TUMBLER

66 70276001

Page 69

Section 7 Wiring Schematics

WARNING

Failure to install, maintain, and/or operate this machine according to the manufacturer's instructions may result in conditions which can produce bodily injury and/or property damage.

W030

AT, HT, PT, ST, UT, WT AND XT MANUAL TIMER MODELS

460 VAC, 60 HERTZ, 3 PHASE STEAM TUMBLER

70276001 67

Page 70

Section 7 Wiring Schematics

WARNING

Failure to install, maintain, and/or operate this machine according to the manufacturer's instructions may result in conditions which can produce bodily injury and/or property damage.

W030

HU, PU, SU, UU AND XU MANUAL TIMER MODELS

380-415 VAC, 50 HERTZ, 3 PHASE GAS TUMBLER

68 70276001

Page 71

Section 7 Wiring Schematics

WARNING

Failure to install, maintain, and/or operate this machine according to the manufacturer's instructions may result in conditions which can produce bodily injury and/or property damage.

W030

HU, PU, SU, UU AND XU MANUAL TIMER MODELS

380-415 VAC, 50 HERTZ, 3 PHASE STEAM TUMBLER

70276001 69

Page 72

Section 7 Wiring Schematics

WARNING

Failure to install, maintain, and/or operate this machine according to the manufacturer's instructions may result in conditions which can produce bodily injury and/or property damage.

W030

AT, HT, PT, ST, UT, WT AND XT MICRO CONTROL RM MODELS

208-230 VAC, 60 HERTZ, 3 PHASE GAS TUMBLER

70 70276001

Page 73

Section 7 Wiring Schematics

WARNING

Failure to install, maintain, and/or operate this machine according to the manufacturer's instructions may result in conditions which can produce bodily injury and/or property damage.

W030

AT, HT, PT, ST, UT, WT AND XT MICRO CONTROL RM MODELS

380-415 VAC, 50 HERTZ, 3 PHASE GAS TUMBLER

70276001 71

Page 74

Section 7 Wiring Schematics

WARNING

Failure to install, maintain, and/or operate this machine according to the manufacturer's instructions may result in conditions which can produce bodily injury and/or property damage.

W030

AT, HT, PT, ST, UT, WT AND XT MICRO CONTROL RM MODELS

460-480 VAC, 60 HERTZ, 3 PHASE GAS TUMBLER

72 70276001

Page 75

Section 7 Wiring Schematics

WARNING

Failure to install, maintain, and/or operate this machine according to the manufacturer's instructions may result in conditions which can produce bodily injury and/or property damage.

W030

AT, HT, PT, ST, UT, WT AND XT MICRO CONTROL RM MODELS

208-230 VAC, 60 HERTZ, 3 PHASE STEAM TUMBLER

70276001 73

Page 76

Section 7 Wiring Schematics

WARNING

Failure to install, maintain, and/or operate this machine according to the manufacturer's instructions may result in conditions which can produce bodily injury and/or property damage.

W030

AT, HT, PT, ST, UT, WT AND XT MICRO CONTROL RM MODELS

380-415 VAC, 50 HERTZ, 3 PHASE STEAM TUMBLER

74 70276001

Page 77

Section 7 Wiring Schematics

WARNING

Failure to install, maintain, and/or operate this machine according to the manufacturer's instructions may result in conditions which can produce bodily injury and/or property damage.

W030

AT, HT, PT, ST, UT, WT AND XT MICRO CONTROL RM MODELS

460-480 VAC, 60 HERTZ, 3 PHASE STEAM TUMBLER

70276001 75

Page 78

Section 7 Wiring Schematics

WARNING

Failure to install, maintain, and/or operate this machine according to the manufacturer's instructions may result in conditions which can produce bodily injury and/or property damage.

W030

HU, PU, SU, UU AND XU MICRO CONTROL RM MODELS

380-415 VAC, 50 HERTZ, 3 PHASE GAS TUMBLER

76 70276001

Page 79

Section 7 Wiring Schematics

WARNING

Failure to install, maintain, and/or operate this machine according to the manufacturer's instructions may result in conditions which can produce bodily injury and/or property damage.

W030

HU, PU, SU, UU AND XU MICRO CONTROL RM MODELS

380-415 VAC, 50 HERTZ, 3 PHASE STEAM TUMBLER

70276001 77

Page 80

Section 7 Wiring Schematics

Notes

78 70276001

Page 81

Page 82