ALLIANCE GU050N, HA050L, HA050N, HT050L, HT050N Service Manual

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Page 1

Drying Tumblers

50 Pound Capacity

Refer to Page 5 for Model Numbers

Service

www.comlaundry.com

TMB795C

Part No. 70269301

January 2003

Page 2

Section 1 –Safety Information

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

Section 2 –Introduction

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

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

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

Wiring Diagram .......................................................6

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

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

How A Tumbler Works ...........................................8

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. Heating Element Does Not Heat or Burner

Does Not Ignite................................................11

6. Igniter Does Not Shut Off After Gas Ignition —

Gas Burner .......................................................13

7. Heating Element or Burner Shuts off

Prematurely......................................................13

8. Heating Element or Burner Repeatedly Cycles

Off On High Limit Thermostat........................14

9. Heating Element or Burner Does Not Shut-off 14

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

11. Tumbler Overheating.......................................15

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..............................................16

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

16. Troubleshooting Electronic Control Models ...17

17. Tumbler Will Not Start, Time on

Drying Timer, Door Closed .............................18

18. Motor Runs, Time on Drying Timer

But No Heat .....................................................19

19. No Main Burner Flame, Igniter Does

Not Spark .........................................................20

20. Steam OM Models: No Heat with cycle selected,

unit running and calling for heat......................21

21. OM and RM Models: No Start with cycle selected, start button pressed and door closed .22

22. OM Models: No Display after selecting one of

the ON/SELECT keys......................................23

23. Electric OM Models: No Heat with cycle

selected, unit running and calling for heat.......24

24. Gas OM Models: No Heat with cycle selected,

unit running and calling for heat......................25

25. OM Models: No fan motor rotation with cycle

selected and start pressed.................................26

26. OM Reversing Models: No cylinder rotation or

reversing capabilities .......................................27

27. CD Models: No start with vend satisfied and start

button pressed in ..............................................28

28. CD Models: No Heat with vend satisfied and unit

running.............................................................29

29. CD Models: No start with vend satisfied and start

button pushed...................................................30

Section 4 –Grounding

Grounding Instructions ..........................................31

Section 5 –Service Procedures

30. Controls ...........................................................33

31. Push-to-Start Switch........................................33

32. Cooling, Drying, or Run Light ........................33

33. Coin Meter.......................................................34

34. Coin Meter Timer Motor .................................34

35. Coin Meter Run or Heat Switch ......................34

36. Igniter...............................................................36

37. Ignition Control ...............................................36

38. Gas Valve.........................................................36

39. Burner Tube.....................................................36

40. Contactors and Terminal Block.......................38

41. Heater Element ................................................38

42. Stove High Limit Thermostat..........................40

43. Cabinet High Limit Thermostat.......................41

44. High Limit Thermostat ....................................42

45. Thermistor .......................................................42

46. Steam Coils......................................................42

47. Loading Door Assembly..................................43

48. Door Hinge ......................................................43

49. Loading Door Handle ......................................43

50. Front Panel.......................................................44

51. Airflow Switch ................................................45

52. Drive Guard .....................................................45

53. Drive Belt ........................................................45

(continued)

the expressed written consent of the publisher.

70269301 1

Page 3

54. Drive Belt.........................................................46

55. Idler Shaft ........................................................47

56. Trunnion Housing Assembly...........................48

57. Trunnion Shaft Assembly................................49

58. Motor and Fan Assembly.................................50

59. Fan And Motor Assembly ...............................52

60. Cylinder Drive Motor ......................................53

Section 6 –Adjustments

61. Leveling Legs ..................................................55

62. Main Gas Burner Air Inlet Shutters.................56

63. Airflow Switch.................................................57

64. Loading Door Strike ........................................59

65. Drive Belt Tension...........................................59

66. Cylinder Clearance ..........................................62

2 70269301

Page 4

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.

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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 70269301

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Section 2

Introduction

Model Identification

Information in this manual is applicable to these models†:

Gas Steam Electric

AT050L AT050N GT050L GU050L GU050N HA050L HA050N HT050L HT050N HU050L HU050N LT050L LT050N LU050L LU050N

PA050L PA050N PT050L PT050N PU050L PU050N SA050L SA050N ST050L ST050N SU050L SU050N UA050L UA050N UT050L UT050N UU050L UU050N

AT050S GU050S HT050S HU050S PT050S

PU050S ST050S SU050S UT050S UU050S

GT050E GU050E HT050E HU050E LU050E PT050E

PU050E ST050E SU050E UT050E UU050E

†Includes models with control suffixes:

BC - basic electronic, coin MT - manual timer RM - reversing OPL micro BL - basic electronic, central pay NC - NetMaster coin RT - reversing manual timer BX - basic electronic, prep for coin NR - NetMaster card ZC - NetMaster coin network ready BY - basic electronic, prep for card NX - NetMaster prep for coin ZR - NetMaster card network ready CD - rotary coin drop NY - NetMaster prep for card ZX - NetMaster prep for coin network ready CX - prep for coin drop OM - OPL micro ZY - NetMaster prep for card network ready CY - prep for card

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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 found on serial plate on the rear of machine and inside door.

Wiring Diagram

The wiring diagram is located in the contactor box.

SERIAL

PLATE

TMB803N

6 70269301

Page 8

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 Parts Manual for ordering replacement decals.

Safety Precautions for Servicing Tumblers

Prior to servicing tumbler:

• Disconnect electrical service and “lockout” to prevent unintentional connection.

Section 2 Introduction

• Shut off supply gas valve.

• Allow machine to cool prior to servicing.

After servicing tumbler:

• Control/access panels must be reinstalled.

• Motor/drive/belt guards must be reinstalled.

• Contactor/junction/accessory box covers must be reinstalled.

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

• The loading door switch, lint door switch and airflow switch must be operating properly.

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Page 9

Section 2 Introduction

How A Tumbler Works

Fresh Air Combustion Air Mixed Air Exhaust Air

TMB1748S

The tumbler uses heat, air and movement to dry loads of laundry. When the motor is started, the exhaust fan pulls fresh air in through the air intake and over the heat source (burner

flame for gas, heating element for electric, and coil for steam). The heated air moves into the cylinder, where it is circulated through the laundry by the tumbling action of the

cylinder. The air then passes through the lint filter, exhaust fan, and is vented to the outdoors.

8 70269301

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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 or fuses blown. • Check power and fuses. Replace fuses if necessary. Loading door not closed or inoperative door switch. • Close door, or test switch and replace if inoperative. Lint door not closed or inoperative lint door switch. • Close lint door, confirm switch is positioned to actuate

with door closed.

Trunnion shaft assembly binding in trunnion housing bearings.

Start circuit not completed. • Press start switch, or test switch and replace if

Idler shaft binding in idler housing bearings. • Replace bearings. Inoperative motor. • Have motor tested and replace if inoperative. Non-Metered Models: Timer improperly set. • Turn drying timer clockwise to desired setting. Non-Metered Models: Inoperative timer or relay. • Test timer and relay and replace if inoperative. Metered Models: Improper coins inserted in

accumulator. Metered Models (CD models): Accumulator knob

improperly set after coins were inserted. Metered Models (CD models): Inoperative run

switch (accumulator). Broken, loose, or incorrect wiring. • Refer to wiring diagram located inside contactor box.

• Replace trunnion housing bearings.

inoperative.

• Check that proper coins are inserted.

• Turn knob clockwise to its full limit of travel.

• Test run switch and replace if inoperative.

W002

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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 the Installation Manual for electrical

requirements.

Clothes load too large. • Remove part of load. Clothes cylinder is binding. • Check cylinder for binding. Refer to Adjustment Section

for cylinder adjustment.

Inadequate wiring. • Check with an electrician to ensure that wiring 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 inside contactor box.

W002

3. MOTOR RUNS BUT CYLINDER DOES NOT TURN.

POSSIBLE CAUSE TO CORRECT

Motor drive pulley loose. • Confirm key is in place, tighten setscrews. Sheave loose. • Confirm key is in place, tighten setscrews and bushing. Broken or loose belt. • Replace or adjust belt. Cylinder is binding. • Check cylinder for binding. Refer to Adjustment Section

for proper cylinder adjustment. Cylinder turn counterclockwise when viewed from

• Switch power leads L1 and L2 to correct rotation.

front of machine. (3 Phase models only)

4. MOTOR DOES NOT STOP

POSSIBLE CAUSE TO CORRECT

Inoperative door switch. • Test switch and replace if inoperative. Non-Metered Models: Inoperative timer or relay. • Test timer and relay and replace if inoperative. Metered Models: Inoperative accumulator. • Test accumulator and replace if inoperative. Incorrect wiring. • Refer to wiring diagram located inside contactor box. Inoperative motor relay or motor contactor. • Check relay/contactor and replace if inoperative.

10 70269301

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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. HEATING ELEMENT DOES NOT HEAT OR BURNER DOES NOT IGNITE

POSSIBLE CAUSE TO CORRECT

Improper or inadequate exhaust or make-up air system.

Blown fuses or tripped circuit breakers. • Check fuses or circuit breakers. Drying timer not selected or inoperative. • Set drying timer or replace if necessary. “No Heat” selected on control. • Select temperature option. Inoperative control relay. • Test relay and replace if inoperative. Inoperative thermistor. • Test thermistor by removing harness from thermistor

Electric Models:

Inoperative heating elements or contactors.

Gas Models:

Insufficient gas supply.

Gas Models:

Incorrect orifices.

Gas Models:

Inoperative gas valve coils. Gas Models: Inoperative igniter. • Test igniter and replace if inoperative. Gas Models: Inoperative igniter control. • Test igniter control and replace if inoperative.

• Refer to the Installation Manual for exhaust and make-

up air requirements.

terminals. Check resistance across terminals, should read approximately 50,000 Ohms at 77°F. Resistance should decrease with a temperature increase. Replace thermistor if inoperative.

• Check heat contactors and elements. Replace if necessary.

• Open partially closed gas shut-off valve, or correct low gas pressure. Check inlet pressure and compare to pressure specified on serial plate. If pressure cannot be obtained, contact gas supplier.

• Tumbler is equipped for type of gas specified on serial plate at 0-2,000 feet altitude. Refer to Installation Manual.

• Test coils and replace if available as a service part, otherwise replace valve.

W002

(continued on next page)

70269301 11

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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. HEATING ELEMENT DOES NOT HEAT OR BURNER DOES NOT IGNITE (continued)

POSSIBLE CAUSE TO CORRECT

Gas and Electric Models:

Inoperative high limit thermostat.

Gas and Electric Models:

Inoperative airflow switch.

Gas and Electric Models:

Airflow switch out of adjustment.

Lint door panel not closed properly. • Open lint door panel. Place lint door panel back on

Broken, loose, or incorrect wiring. • Refer to wiring diagram located inside contactor box.

• Test thermostat and replace if inoperative.

• Clean lint compartment after every eight hour shift.

• Check back draft damper for foreign objects, lint accumulation, or other causes that may prevent damper from opening.

• Check ductwork for lint build-up. Refer to Installation Manual to ensure that ductwork and make-up air openings are sized properly.

• Check exhaust outlet. If a screen has been installed on the outlet, it may be clogged with lint or frozen over in winter. NEVER install a screen over the exhaust outlet.

•Refer to Adjustment Section for airflow switch adjustment.

tumbler ensuring a tight fit.

W002

12 70269301

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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. IGNITER DOES NOT SHUT OFF AFTER GAS IGNITION — GAS BURNER

POSSIBLE CAUSE TO CORRECT

Tumbler not properly equipped for type of gas being used.

• Tumbler is equipped for type of gas specified on serial

plate at 0-2,000 feet altitude. Refer to Installation Manual.

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

gas pressure.

Improperly adjusted burner flame. • Refer to Adjustment Section for recommended burner

flame adjustment. Electrode assembly incorrectly installed. • Check assembly for correct alignment. Inoperative igniter control. • Test igniter control and replace if inoperative. Incorrect wiring. • Refer to wiring diagram located inside contactor box.

W002

7. HEATING ELEMENT OR BURNER SHUTS OFF PREMATURELY

POSSIBLE CAUSE TO CORRECT

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

Gas Models:

Insufficient gas supply.

Gas Models:

Tumbler not properly equipped for type of gas used.

Gas Models:

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

requirements.

• Open partially closed gas shut-off valve, or correct low pressure.

• Tumbler is equipped for type of gas specified on serial plate at 0-2,000 feet altitude. Refer to Installation Manual.

•Refer to Adjustment Section for burner flame adjustment.

Improperly adjusted burner flame. Cycling off on high limit thermostat. • Refer to Paragraph 8. Broken, loose or incorrect wiring. • Refer to wiring diagram located inside contactor box.

70269301 13

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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. HEATING ELEMENT OR BURNER REPEATEDLY CYCLES OFF ON HIGH LIMIT THERMOSTAT

POSSIBLE CAUSE TO CORRECT

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

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

Lint in tumbler ducts. • Clean tumbler ducts. Lint in external exhaust system. • Disassemble exhaust system and clean. High limit thermostat cycling at too low a

temperature. Lint door panel not closed properly. • Open lint door panel, place lint door panel back on

Backdraft damper not operating. • Check for foreign objects, lint accumulation or other

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

requirements.

should be cleaned after every eight hour shift.

• Replace thermostat.

tumbler ensuring a tight fit.

possible obstructions.

W002

9. HEATING ELEMENT OR BURNER DOES NOT SHUT-OFF

POSSIBLE CAUSE TO CORRECT

Gas Models:

• Replace gas valve. Impurities on gas valve seat, preventing valve from closing.

Inoperative drying timer, relay or contactor. • Replace timer, relay or contactor. Incorrect wiring. • Refer to wiring diagram located inside contactor box.

10. CLOTHES DO NOT DRY

POSSIBLE CAUSE TO CORRECT

Heat source inoperative. • Refer to Paragraph 5. Too much water in articles being dried. • Remove excess water. Clothes load too large. • Remove part of load. Improper or inadequate exhaust system. • Refer to Installation Manual for exhaust requirements. Heat source shuts-off prematurely. • Refer to Paragraph 7. 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.

14 70269301

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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.

11. TUMBLER OVERHEATING

POSSIBLE CAUSE TO CORRECT

Gas Models:

Incorrect main burner orifices.

Gas Models:

• Replace orifices. Refer to the Installation Manual for

burner orifice requirements.

• Gas pressure must be as specified on serial plate.

Gas pressure too high.

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 thermistor. • Test thermistor by removing harness from thermistor

terminals. Check resistance across terminals, should read

approximately 50,000 Ohms at 77°F. Resistance should

decrease with a temperature increase. Replace thermistor

if inoperative. Inoperative cabinet limit or burner limit thermostat. • Check thermostats with Ohm meter and replace if open.

W002

12. BURNERS NOT BURNING PROPERLY — GAS MODELS

POSSIBLE CAUSE TO CORRECT

Burner air shutters incorrectly adjusted. • Refer to Adjustment Section for proper flame adjustment. Dirt in burners. • Disassemble burners and blow out the dirt. Gas pressure too high or too low. • Check serial plate on back of the tumbler for correct gas

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

plate at 0-2,000 feet altitude. Refer to Installation

Manual. Make-up air inadequate or pressured. • Refer to Installation Manual for proper make-up air

requirements. Restricted or blocked exhaust duct. • Disassemble and clean exhaust system.

13. LOADING DOOR OPENS DURING OPERATION

POSSIBLE CAUSE TO CORRECT

Door strike improperly adjusted. • Refer to Adjustment Section for door strike adjustment. Tumbler improperly leveled. • Refer to Adjustment Section for leveling leg adjustment.

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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.

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

POSSIBLE CAUSE TO CORRECT

Valves 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. Inoperative timer or thermistor. • Test timer. Test thermistor by removing harness from

thermistor terminals. Check resistance across terminals,

should read approximately 50,000 Ohms at 77°F.

Resistance should decrease with a temperature increase.

Replace either if inoperative.

W002

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.

16 70269301

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.

16. TROUBLESHOOTING ELECTRONIC CONTROL MODELS

PROBLEM POSSIBLE CAUSE TO CORRECT

Door Open light and display flash with door closed

Display shows “SH” and signals sounds

Display shows “OP” and signal sounds three minutes after tumbler is started

Door switch faulty. Replace door switch. Lint panel switch faulty. Replace lint panel switch. Electrical service connected

incorrectly.

Check service connections to terminal block in junction box. For 120 or 240 Volt tumblers, neutral wire must be connected to terminal marked “NEUT”. On single phase tumblers, hot wire must be connected to terminal marked “L1”. A ground wire must be secured to the ground screw in the junction box.

Temperature at sensor is over 191°F (88.3°C).

Allow tumbler to cool and press ON/SELECT

pad. If display still shows “SH”, replace sensor. Temperature sensor shorted. Replace temperature sensor. Temperature at sensor is under 24°F

(-4.4°C).

If the temperature of the tumbler is above 24°F

(-4.4°C), replace temperature sensor. Temperature sensor open. Replace temperature sensor.

W002

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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.

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

(Manual Timer Models)

W002

CHECK FOR

24 VOLTS

INTO

DOOR

SWITCH

CHECK

ELECTRICAL

SERVICE TO TUMBLER (Transformer/

Fuses)

CHECK FOR

24 VOLTS ON

TERMINAL 5 OF

CONTROL RELAY

REPLACE

RELAY

CHECK FOR

24 VOLTS

OUT OF

DOOR

SWITCH

HAS

DOOR SWITCH

BEEN

ACTUATED?

REPLACE

DOOR

SWITCH

YES YE S YES

PUSH-TO-START

BROKEN WIRE

FROM CONTROL

RELAY TERMINAL 5

YES

NO NO

YES

CHECK FOR

24 VOLTS INTO

SWITCH

CHECK FOR

24 VOLTS

OUT OF

LINT PANEL

SWITCH

HAS

LINT PANEL

SWITCH

BEEN

ACTUATED?

REPLACE

LINT PANEL

SWITCH

NO NO

YES

PUSH-TO-START

SWITCH. CHECK FOR

24 VOLTS OUT

OF PUSH-TO-START

PUSH-TO-START

CHECK FOR

24 VOLTS AT

TERMINAL 3 OF

CONTROL

RELAY

CHECK

LINT PANEL

SWITCH FOR

BROKEN WIRE

OR POOR

CONNECTION

AT HARNESS

PLUG

PRESS

SWITCH

REPLACE

SWITCH

CHECK FOR

YESYES

CHECK FOR

24 VOLTS TO

MOTOR RELAY

BROKEN WIRE

CONNECTION

AT HARNESS PLUG

24 VOLTS

ACROSS COIL

TERMINALS OF

CONTROL RELAY

CHECK FOR

24 VOLTS ON

TERMINAL B

OF DRYING TIMER

REPLACE

TIMER

COIL

CHECK FOR

OR POOR

YES

CHECK FOR LINE VOLTAGE IN AND OUT OF

RELAY

CHECK POWER

SUPPLY TO

TUMBLER AND

WIRES TO RELAY

YES

18 70269301

CHECK MOTOR

CONNECTIONS

PER WIRING

DIAGRAM

CORRECT

WIRING

YES

CHECK FOR

LINE VOLTAGE

AT MOTOR

TERMINALS

CHECK CONNECTIONS AND HARNESS

CONTINUITY

YES

REPLACE

MOTOR

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.

18. MOTOR RUNS, TIME ON DRYING TIMER BUT NO HEAT

W002

POWER OUT OF

TEMPERATURE

CONTROL

BOARD

YES

CHECK THE

IGNITION

CIRCUIT

CHECK FOR

BROKEN OR LOOSE WIRE AT HARNESS PLUG

YES

REPAIR

WIRE

COIN SWITCH B

POWER INTO

TEMPERATURE

CONTROL

BOARD

YES

CHECK

THERMISTOR

AND CABLE, IF OK REPLACE TEMPERATURE

CONTROL BOARD

NO YES

POWER INTO

BURNER

HIGH LIMIT

THERMOSTAT

CHECK FOR

BROKEN WIRE

FROM AIRFLOW

SWITCH

NORMALLY CLOSED

(CD MODELS)

POWER ON

TERMINAL 4 OF

CONTROL RELAY

(MANUAL TIMER

MODELS)

YES

LOOSE OR

BROKEN WIRE TO

TEMPERATURE

CONTROL BOARD

YES YES

NO NO

POWER OUT OF

HIGH LIMIT

THERMOSTAT

HIGH LIMIT

THERMOSTAT

COIN SWITCH B

REPLACE

BURNER

(CD MODELS)

TERMINAL 6 OF

CONTROL RELAY

(MANUAL TIMER

BURNER

COMMON

YES

POWER ON

YES

MODELS)

POWER INTO

CHECK FOR

LOOSE OR

BROKEN WIRE

FROM CABINET

REPLACE

SWITCH B OR

ACCUMULATOR

POWER ACROSS

COIL TERMINALS OF

CONTROL RELAY

REPLACE

CONTROL RELAY

AIRFLOW

SWITCH

LIMIT

YES

POWER OUT OF

AIRFLOW

SWITCH

AIRFLOW

SWITCH

CLOSED

ADJUST

AIRFLOW

SWITCH

70269301 19

YES

REPLACE

AIRFLOW

SWITCH

POWER INTO

CABINET

HIGH LIMIT

THERMOSTAT

CHECK FOR

BROKEN WIRE

FROM

MOTOR SWITCH

YES

POWER OUT OF

CABINET

HIGH LIMIT

THERMOSTAT

REPLACE

THERMOSTAT

YES

CHECK FOR

LOOSE OR

BURNED CONNECTION AT HARNESS

PLUGS

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.

19. NO MAIN BURNER FLAME, IGNITER DOES NOT SPARK

W002

IGNITER

SPARKING

YES

GREEN WIRE

FROM

IEI CONTROL

CONNECTED TO

GROUND

TERMINAL?

YES

GAS SHUT-OFF

VALVE

OPEN?

IEI CONTROL IN

SAFETY LOCKOUT

RESET BY OPENING

AND CLOSING DOOR

YES

OPEN AND

CLOSE DOOR

CONNECT

GREEN WIRE TO

GROUND TERMINAL

OPEN GAS SHUT-OFF

VALVE

RESISTANCE OF

HIGH VOLTAGE LEAD

GREATER THAN 25,000

OHMS OR LESS THAN

5,000 OHMS

YES YES

REPLACE

HIGH VOLTAGE

LEAD

IGNITER GAP IS

NOT 5/32 IN.

(.397 CM)

OR CERAMIC

CRACKED

RE-GAP OR

REPLACE

IGNITER

REPLACE

IEI

CONTROL

YES

24 VOLTS

PRESENT ON

WHITE/BLACK

WIRE FROM

IEI CONTROL

YES

CHECK GAS

VALVE COILS

REPLACE

AS REQUIRED

20 70269301

REPLACE

IEI

CONTROL

Page 22

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.

20. STEAM OM MODELS: NO HEAT WITH CYCLE SELECTED, UNIT RUNNING AND CALLING FOR HEAT 120 Volt/60 Hertz/1 Phase and 208-240 Volt/60 Hertz/1 Phase Nonreversing 460-480 Volt/60 Hertz/3 Phase and 208-240 Volt/60 Hertz/3 Phase Reversing and Nonreversing

Step Problem If No, then

1 Is there voltage at H2-13? If yes, continue to next step. Replace micro control. 2 Is there voltage at H2-6? If yes, continue to next step. Correct wiring between H2-6 and H2-13. 3 Is there voltage at H2-5? If yes, continue to next step. Check for proper thermistor operation. Replace micro

control if necessary.

4 Is there voltage to the input of the motor relay? If yes,

continue to next step. 5 Is there voltage to the output of the motor relay? Replace motor relay. 6 Is there voltage to the input of the motor switch? If yes,

continue to next step. 7 Is there voltage to the output of the motor switch? If yes,

continue to next step. 8 Is there voltage across the steam valve coil? If yes,

continue to next step. 9 Unit operational. If unit still doesn’t heat, check steam

supply.

Correct wiring between motor relay and micro control.

Correct wiring to motor switch.

Replace motor.

Correct wiring to steam valve coil.

W002

70269301 21

Page 23

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.

21. OM AND RM MODELS: NO START WITH CYCLE SELECTED, START BUTTON PRESSED AND DOOR CLOSED 120 Volt/60 Hertz/1 Phase Gas and Steam Nonreversing 208-240 Volt/60 Hertz/1 or 3 Phase Steam Nonreversing 208-240 Volt/60 Hertz/3 Phase Electric Nonreversing 460-480 Volt/60 Hertz/3 Phase Gas, Electric and Steam Nonreversing

Step Problem If No, then

1 Is there voltage to the primary of the transformer? If yes,

continue to next step.

2 Is there 24 VAC across terminals 2 & 3 of transformer

secondary? If yes, continue to next step.

3 Is there voltage to the COM terminal of the door switch?

If yes, continue to next step.

4 Is there voltage to the N.O. terminal of the door switch? If

yes, continue to next step.

5 Is there voltage to the COM terminal of the lint panel

switch? If yes, continue to next step.

6 Is there voltage to the N.O. terminal of the lint panel

switch? If yes, continue to next step.

7 Is there voltage to terminal H2-8 on the micro control? If

yes, continue to next step.

8 Is there voltage at terminal H2-7 on the micro control? If

yes, continue to next step.

9 Is there voltage across the coil of motor relay? If yes,

continue to next step.

10 Is there voltage to the input of the motor relay? If yes,

continue to next step.

11 Is there voltage to the output of the motor relay? If yes,

continue to next step. 12 Does the motor operate? If yes, continue to next step. Replace motor. 13 Unit operational.

Correct wiring to transformer primary. Check fuses.

Replace transformer.

Correct wiring between door switch and transformer. Check fuse.

Check door switch for proper operation. Replace if necessary.

Correct wiring between lint panel switch and loading door switch.

Check lint panel switch for proper operation. Replace if necessary.

Correct wiring between micro control and lint panel switch.

Replace micro control.

Correct wiring between motor relay and micro control.

Correct wiring between motor relay and supply voltage.

Replace motor relay.

W002

22 70269301

Page 24

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.

22. OM MODELS: NO DISPLAY AFTER SELECTING ONE OF THE ON/SELECT KEYS 120 Volt/60 Hertz/1 Phase Gas and Steam Nonreversing 208-240 Volt/60 Hertz/1 Phase Gas and Steam Nonreversing 208-240 Volt/60 Hertz/3 Phase Gas and Steam Reversing/Nonreversing 208-240 Volt/60 Hertz/3 Phase Electric Reversing/Nonreversing 460-480 Volt/60 Hertz/3 Phase Gas, Electric and Steam Reversing/Nonreversing

Step Problem If No, then

1 Is there voltage across the primary of the transformer? If

yes, continue to next step.

2 Is there 24 VAC across terminals 1 & 4 of transformers

secondary? If yes, continue to next step.

3 Is there 24 VAC across terminals H3-3 and H3-4 on the

micro control? If yes, continue to next step.

4 Is there voltage to the input of the fuse on the micro

control? If yes, continue to next step.

5 Is there voltage to the opposite side of the fuse on the

micro control? If yes, continue to next step.

6 Replace micro control.

Correct wiring between transformer and supply voltage. Check fuses.

Replace transformer.

Correct wiring between H3 and transformer.

Replace micro control.

Check fuse making sure it is not blown. Replace if necessary.

W002

70269301 23

Page 25

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.

23. ELECTRIC OM MODELS: NO HEAT WITH CYCLE SELECTED, UNIT RUNNING AND CALLING FOR HEAT 460-480 Volt/60 Hertz/3 Phase and 208-240 Volt/60 Hertz/3 Phase Reversing and Nonreversing

Step Problem If No, then

control if necessary.

4 Is there voltage to terminal 14 of the motor relay? If yes,

continue to next step.

5 Is there voltage to terminal 13 of the motor relay? If yes,

continue to next step.

6 Is there voltage at white/brown fan motor centrifugal

switch?

7 Is there voltage at orange/brown fan motor centrifugal

switch?

8 Is there voltage to cabinet limit black wire? Correct wiring between fan motor centrifugal switch and

9 Is there voltage out of cabinet limit white wire? Replace thermostat. 10 Is there voltage to airflow switch orange wire (common

terminal)?

11 Is there voltage to the N.O. terminal of the airflow switch?

If yes, continue to next step.

12 Is there voltage to the input of the stove limit? If yes,

continue to next step.

13 Is there voltage to the output of the stove limit? If yes,

continue to next step. 14 Is there voltage across coil of HC1? Correct wiring to HC1. 15 Is there voltage to terminals T1, T2 and T3 of HC1? If yes,

continue to next step. 16 Is there voltage to terminals L1, L2 and L3 of HC1? Replace HC1. 17 Is there voltage across the elements? If yes, then continue

to next step. 18 Do the elements produce heat? If yes, continue to Step 16.

Correct wiring between motor relay and micro control.

Replace motor relay.

Correct wiring between relay and motor switch.

Replace motor.

cabinet limit thermostat.

Correct wiring between cabinet limit and airflow switch.

Check for proper airflow. Replace airflow switch.

Correct wiring between stove limit and airflow switch.

Check for proper airflow. Replace stove limit if necessary.

Correct wiring between HC1 and supply.

Correct wiring to the elements.

Check for opens or shorts in the elements.

W002

NOTE: If elements are glowing a bright red/orange, there

is not enough airflow. 19 Unit operational.

(continued)

24 70269301

Page 26

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.

24. GAS OM MODELS: NO HEAT WITH CYCLE SELECTED, UNIT RUNNING AND CALLING FOR HEAT 120 Volt/60 Hertz/1 Phase and 208-240 Volt/60 Hertz/1 Phase Nonreversing 460-480 Volt/60 Hertz/3 Phase and 208-240 Volt/60 Hertz/3 Phase Reversing and Nonreversing

Step Problem If No, then

1 Is there voltage at H2-13? If yes, continue to next step. Replace micro control. 2 I s t he re vo l ta ge a t H 2- 6 o f t he mi cr o c on tr ol ?

If yes, continue to next step.

3 I s t he re vo l ta ge a t H 2- 5 o f t he mi cr o c on tr ol ?

If yes, continue to next step.

4 Is there voltage to input of the motor relay? If yes,

continue to next step.

5 Is there voltage to the output of the motor relay? If yes,

continue to next step.

6 Is there voltage to the input of fan motor switch? If yes,

continue to next step.

7 Is there voltage out from the fan motor switch? If yes,

continue to next step.

8 Is there voltage to the input of the cabinet limit? If yes,

continue to next step.

9 Is there voltage to the output of the cabinet limit? If yes,

continue to next step

10 Is there voltage to COM terminal of the airflow switch?

If yes, continue to next step.

11 Is there voltage to the N.O. terminal of the airflow switch?

If yes, continue to next step.

12 Is there voltage to the input of the stove limit? If yes,

continue to next step.

13 Is there voltage to the output of the stove limit? If yes,

continue to next step.

14 Is there voltage to terminal 2 of the ignition control?

If yes, continue to next step.

15 Does the igniter spark? If yes, continue to next step. Check for proper gap on igniter and check for proper

16 Is there voltage at terminal 1 of the ignition control? If yes,

continue to next step.

17 Is there voltage across the gas valve? If yes, continue to

next step.

18 Is there a flame? If yes, continue to next step. Check for gas flow and proper gas pressure. Replace gas

19 Unit operational.

Correct wiring between H2-6 and H2-13 on the micro control.

Check for proper thermistor operation. Replace micro control if necessary.

Correct wiring between motor relay and micro control.

Replace motor relay.

Correct wiring to fan motor switch?

Replace fan motor.

Correct wiring between cabinet limit and CR1.

Replace cabinet limit.

Correct wiring between airflow switch and cabinet limit.

Check for proper operation and airflow. Replace airflow switch if necessary.

Correct wiring between stove limit and airflow switch.

Check for proper airflow. Replace stove limit if necessary.

Correct wiring between ignition control and stove limit.

resistance of ignition cable. Replace if necessary. Replace ignition control.

Correct wiring to gas valve.

valve or coils of gas valve.

W002

70269301 25

Page 27

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.

25. OM MODELS: NO FAN MOTOR ROTATION WITH CYCLE SELECTED AND START PRESSED 208-240 Volt/60 Hertz/3 Phase and 480 Volt/60 Hertz/3 Phase Electric Reversing Models 208-240 Volt/60 Hertz/3 Phase and 460-480 Volt/60 Hertz/3 Phase Gas Reversing and Steam Models

Step Problem If No, then

1 Is there voltage across the primary of the transformer?

If yes, continue to next step.

2 Is there 24 VAC across terminals 2 & 3 of the transformer

secondary? If yes, continue to next step.

3 Is there voltage to the COM of the door switch?

If yes, continue to next step.

4 Is there voltage to the N.O. terminal of the door switch?

If yes, continue to next step.

5 Is there voltage into lint panel switch? If yes, continue to

next step.

6 Is there voltage out of lint panel switch? If yes, continue to

next step.

7 Is there voltage to H2-8 of micro control? If yes, continue

to next step.

8 Is there voltage to H2-7 of micro control? If yes, continue

to next step.

9 Is there voltage across the coil of the M contactor? If yes,

continue to next step.

10 Is there voltage to L1, L2 and L3 of the M contactor?

If yes, continue to next step.

11 Is there voltage toT1, T2 and T3 of the M contactor?

If yes, continue to next step.

12 Is there voltage across L1, L2 and L3 of the motor?

If yes, continue to next step.

13 Unit operational.

Correct wiring to transformer. Check fuses.

Replace transformer.

Correct wiring to door switch. Check fuse.

Check door switch for proper operation. Replace if necessary.

Correct wiring between door switch and lint panel switch.

If actuated replace inoperative switch. If not actuated adjust switch as needed.

Correct wiring between micro control and door switch.

Replace micro control.

Correct the wiring to the M contactor.

Correct wiring between M contactor and supply voltage.

Replace M contactor.

Correct wiring between motor and M contactor.

W002

26 70269301

Page 28

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.

26. OM REVERSING MODELS: NO CYLINDER ROTATION OR REVERSING CAPABILITIES 208-240 Volt/60 Hertz/3 Phase and 480 Volt/60 Hertz/3 Phase Electric Models 208-240 Volt/60 Hertz/3 Phase and 460-480 Volt/60 Hertz/3 Phase Gas and Steam Models

Step Problem If No, then

1 Is there voltage across the primary of the transformer?

If yes, continue to next step.

2 Is there voltage across terminals 2 & 3 of the transformer

secondary? If yes, continue to next step.

3 Is there voltage to the COM of the door switch?

If yes, continue to next step.

4 Is there voltage to the N.O. terminal of the door switch?

If yes, continue to next step.

5 Is there voltage into lint panel switch? If yes, continue to

next step.

6 Is there voltage out of lint panel switch? If yes, continue to

next step.

7 Is there voltage to H2-8 terminal of micro control?

If yes, continue to next step for forward rotation, or Step 11 for reverse rotation.

8 Forward Rotation: Is there voltage to H2-3 of micro

control? If yes, continue to next step.

9 Is there voltage across the coil of the forward relay?

If yes, continue to next step.

10 Is there voltage to terminals L1, L2 and L3 of the forward

relay? If yes, continue to next step.

11 Is there voltage to terminals T1, T2 and T3 of the forward

relay? If yes, continue to next step.

12 Is there voltage across L1, L2 and L3 of the motor?

If yes, continue Step 16.

13 Reverse Rotation: Is there voltage to H2-4 of micro

control? If yes, continue to next step.

14 Is there voltage across the coil of the reverse relay?

If yes, continue to next step.

15 Is there voltage to terminals X, Y and Z of the reversing

relay? If yes, continue to next step.

16 Is there voltage to terminals U, V and W of the reversing

relay? If yes, continue to next step.

17 Is there voltage across L1, L2 and L3 of the motor?

If yes, continue to next step. 18 Does the motor turn? If yes, continue to next step. Replace motor. 19 Does the cylinder rotate? If yes, continue to next step. Check drive components between motor and cylinder. 20 Unit operational.

Correct wiring between transformer and supply voltage. Check fuses.

Replace transformer.

Correct wiring to door switch. Check fuses.

Correct wiring and check fuses.

Correct wiring between door switch and lint panel switch.

If actuated replace inoperative switch. If not actuated adjust switch as needed.

Correct wiring between micro control and door switch.

Make sure unit is in the forward portion of rotation. Replace micro control.

Correct the wiring to the relay.

Correct wiring between relay and supply voltage.

Replace forward relay.

Correct wiring between motor and forward relay.

Make sure unit is in the reverse portion of rotation. Replace micro control.

Correct the wiring to the relay.

Correct wiring between relay and supply voltage.

Replace reversing relay.

Correct wiring between motor and reversing relay.

W002

70269301 27

Page 29

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.

27. CD MODELS: NO START WITH VEND SATISFIED AND START BUTTON PRESSED IN

NOTE: All voltage checks are referenced to neutral unless stated otherwise.

Step Problem If No, then

1 Is there voltage to NC terminal of switch A?

If yes, continue to next step.

2 Is there voltage to the COM terminal of switch A?

If yes, continue to next step.

3 Is there voltage to H1-2 at time delay board? If yes,

continue to next step.

4 Is there voltage to H1-3 at time delay board? If yes,

continue to next step.

5 Is there voltage to the common terminal of the door switch?

If yes, continue to next step.

6 With the door closed, is there voltage to the N.O. terminal

of the door switch? If yes, continue to next step.

7 Is there voltage at COM of lint panel switch? If yes,

continue to next step.

8 Is there voltage to NO of lint panel switch? If yes, continue

to next step.

9 Is there voltage to the input side of the Push-To-Start

button? If yes, continue to next step.

10 Is there voltage at output of push-to-start switch? If yes,

continue to next step.

11 Is there voltage to the input side of the auxiliary contacts on

the motor contactor? If yes, continue to next step.

12 Is there voltage across the coil of the motor control

contactor?

13 If the start button is released, does the motor contactor stay

in the made position? If yes, continue to next step.

14 Is there voltage to motor contactor? If yes, continue to next

step.

15 Is there voltage out of the motor contactor? If yes, continue

to next step. 16 Is there voltage to the motor? If yes, continue to next step. Correct wiring between motor contactor and motor. 17 Is the internal wiring of the motor correct for the supply

voltage? 18 Thermal overload cycled, allow motor to cool and recheck. Replace motor. 19 Unit operational.

Correct wiring between L1 and switch A.

Check for proper operation of switch A. Replace switch A if necessary.

Correct wiring between switch A and H1-2 at time delay board.

Replace time delay board.

Correct wiring between door switch and switch A.

Check door switch for proper operation, replace if necessary.

Correct wiring between door switch and lint panel switch.

Adjust switch as needed.

Correct wiring between start switch and lint panel switch.

Replace switch.

Correct wiring between motor contactor and lint panel switch.

Correct wiring between motor contactor and Push-ToStart button.

Check for proper operation of motor contactor and fan motor centrifugal switch, replace if necessary.

Correct wiring between motor contactor and supply.

Check for proper operation. Replace motor contactor if necessary.

Change the wiring accordingly.

W002

28 70269301

Page 30

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.

28. CD MODELS: NO HEAT WITH VEND SATISFIED AND UNIT RUNNING

NOTE: All voltage checks are referenced to neutral unless stated otherwise.

Step Problem If No, then

1 Is there voltage to the output of the motor switch?

If yes, continue to next step.

2 Is there voltage to the input of the cabinet limit?

If yes, continue to next step.

3 Is there voltage to the output of the cabinet limit?

If yes, continue to next step.

4 Is there voltage to the COM terminal of the airflow switch?

If yes, continue to next step.

5 Is there voltage to the N.O. terminal of the airflow switch?

If yes, continue to next step.

6 Is there voltage to the input of the stove limit?

If yes, continue to next step.

7 Is there voltage to the output of the stove limit?

If yes, continue to next step.

8 Is there voltage to the COM terminal of switch B?

If yes, continue to next step.

9 Is there voltage to the N.C. terminal of switch B?

If yes, continue to next step.

10 Is there voltage to temperature control board? If yes,

continue to next step.

11 Is there voltage to temperature control board? If yes,

continue to next step.

12 Is there voltage to the output? If yes, continue to next step. Correct wiring between IEI board and temperature

13 Does the igniter spark? If yes, continue to next step. Check for proper igniter gaps and resistance for high

14 Is there voltage across V1 and V3 of the IEI board?

If yes, continue to next step.

15 Is there voltage across the coils of the gas valve?

If yes, continue to next step. 16 Is there a flame? If yes, unit is operational. Continue to next step. 17 Is there gas pressure on the output side of the gas valve?

If yes, continue to next step. 18 Check for proper gas pressure. 3.5 water column inches for

Natural Gas, 10.5 water column inches for L.P. Gas. † Proper gaps for igniter: 5/16 above burner and 5/32 between electrode and grounding tab. The proper resistance of the high

voltage lead is between 5,000 Ohms and 25,000 Ohms.

Replace motor.

Correct wiring between cabinet limit and motor switch.

Check for proper operation, replace if necessary.

Correct wiring between airflow switch and cabinet limit.

Check for proper airflow and function of the airflow switch. Replace airflow switch if necessary.

Correct wiring between stove limit and airflow switch.

Check for blockage and proper airflow. Replace stove limit if necessary.

Correct wiring between switch B and stove limit.

Check for proper operation, replace switch B if necessary.

Check for voltage at thermistor, or correct wiring between thermostat and switch B.

Disconnect thermistor wires and check resistance across terminals. Should read approximately 50,000 Ohms at 77°F. Resistance should decrease with a temperature increase. Replace board if necessary.

control board.

voltage lead. Replace IEI board.

Correct wiring between gas valve and IEI board.

Replace gas valve.

W002

70269301 29

Page 31

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.

29. CD MODELS: NO START WITH VEND SATISFIED AND START BUTTON PUSHED 240 Volt/60 Hertz/1 Phase Gas Nonreversing

NOTE: All voltage checks are referenced to neutral unless stated otherwise.

Step Problem If No, then

1 Is there voltage to the NC terminal of switch A?

If yes, continue to next step.

2 Is there voltage to COM terminal of switch A?

If yes, continue to next step.

3 Is there voltage to H1-2 on time delay board? If ye,s

continue to next step.

4 Is there voltage to H1-3 on time delay board? If yes,

continue to next step.

5 Is there voltage to COM terminal of the door switch?

If yes, continue to next step.

6 With the door closed, is there voltage to the N.O. terminal

of the door switch? If yes, continue to next step.

7 Is there power at COM of lint panel switch? If yes,

continue to next step. 8 Is there power at NO of lint panel switch? Adjust switch as needed. 9 Is there voltage to the input side of the start switch?

If yes, continue to next step. 10 With the start button pressed in, is there voltage to the

output side of the start button? If yes, continue to next step. 11 Is there voltage to terminal 1 of the control relay?

If yes, continue to next step. 12 Is there voltage to coil of the motor relay? If yes, continue

to next step. 13 Is there live power to motor relay input? If yes, continue to

next step. 14 Is there live power out of motor relay? If yes, continue to

next step. 15 Is there voltage to terminal 1 of the motor? If yes, continue

to next step. 16 Does the motor run? If yes, continue to next step. Replace the motor. 17 Unit operational.

Correct wiring between L1 on TBI and switch A.

Check for proper operation of switch A. Replace switch A if necessary.

Correct wiring between siwtch A and H1-2 at time delay board.

Replace time delay board.

Correct wiring between door switch and switch A of the rotary coin drop.

Check door switch for proper operation, replace if necessary.

Correct wiring between door switch and lint panel switch.

Correct wiring between start switch and lint panel switch.

Replace start switch.

Correct wiring to terminal 1 of the control relay.

Check for proper operation. Replace relay if necessary.

Correct wiring between input terminal block and relay.

Replace contactor.

Correct wiring between motor and start switch.

W002

NOTE: If the motor only runs with the start switch pressed in, that means the centrifugal switch in the motor is bad. Replace the motor.

30 70269301

Page 32

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, DO NOT connect a “High Leg” or “Stinger Leg” to a single phase machine. On a three phase machine, if there is a “High Leg” or “Stinger Leg” it should be connected to L3.

Grounding Instructions

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. 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

W069

70269301 31

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

IMPORTANT: References made to the left or right hand direction are taken from the operator’s position facing the front of the tumbler.

30. CONTROLS

a. Unlock and remove control panel. b. Remove two screws holding control assembly

to tumbler. Pivot control to left, disconnect wire harness plugs and remove control assembly.

IMPORTANT: When handling electronic controls, use a ground wrist strap. Due to the sensitivity of electronic controls, careful handling is required. 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. By using this static protection device, potential electrostatic discharge problems associated with handling of electronic control will be minimized. Always handle electronic control by its metal edges. If a wrist strap is not available, touch tumbler while it is plugged in before handling control to dissipate any charge.

31. PUSH-TO-START SWITCH

a. Remove control. b. Disconnect wires from switch terminals and

compress locking tabs to remove switch.

NOTE: Refer to wiring diagram when rewiring switch.

32. COOLING, DRYING, OR RUN LIGHT

a. Remove control. b. Disconnect light wire leads.

NOTE: On Coin Meter Models, the run light white lead must be joined to the wire harness white lead using a double spade connector. Remove the single spade lug from the replacement run light white wire.

c. Compress locking tabs on sides of light and

push light out through front of control.

NOTE: Refer to wiring diagram when rewiring light.

70269301 33

Page 34

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. COIN METER Refer to Figure 1.

a. Remove control panel and control assembly. b. Disconnect wires from heat and run switches. c. Cut remaining motor wire and joining white

wire at wire nut.

d. Remove four speed nuts holding coin meter to

coin meter frame.

NOTE: Refer to wiring diagram when rewiring coin meter. Connect wires cut in step “c” above with new wire nut.

34. COIN METER TIMER MOTOR Refer to Figure 1.

a. Remove controls. b. Remove two screws holding motor to mounting

bracket.

c. Hold cam and drive fork against inside face of

motor mounting bracket and pull motor free of

cam and drive fork. d. Disconnect motor leads. e. Slide cam and drive fork out from under motor

mounting bracket.

35. COIN METER RUN OR HEAT SWITCH Refer to Figure 1.

a. Remove controls. b. Disconnect wires from switches on timer. c. Hold switches and actuating bracket under

switches tightly together with one hand while removing two screws holding switches to timing motor mounting bracket. Carefully remove the switches and actuating bracket parts.

d. Assemble the two switches and the two parts

making up the switch actuating bracket.

e. Actuate the switches a number of times by

manually pressing the actuating plate against the switch lever and plunger to ensure that the actuating parts do not bind. If binding occurs, reposition the actuating plate slightly until the binding stops.

NOTE: Refer to wiring diagram when rewiring switches.

NOTE: Refer to wiring diagram when rewiring timer motor.

34 70269301

Page 35

COIN

METER

Section 5 Service Procedures

SWITCH

ACTUATOR

TIMER

MOTOR

CAM AND

DRIVE FORK

BRACKET

RUN

SWITCH

HEAT

SWITCH

TMB1749S

Figure 1

70269301 35

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

36. IGNITER

a. Remove control panel. b. Disconnect high voltage lead from igniter. c. Remove two screws attaching igniter bracket to

stove assembly.

37. IGNITION CONTROL Refer to Figure 2.

a. Remove control panel. b. Disconnect wire harness. c. Remove high voltage lead.

IMPORTANT: Place unit in clean, dry area away from work area to avoid damage. Do not attempt field repair of the ignition control unit. Attempted repair or tampering with the ignition control unit will void its warranty.

d. Remove two screws attaching ignition control

unit to cabinet frame.

e. Remove ignition control.

38. GAS VALVE Refer to Figure 2.

a. Remove control panel. b. Close gas shut-off valve. c. Disconnect all wires from gas valve terminals

and disconnect gas valve pipe unions.

d. Remove screws holding gas valve bracket to

stove.

e. Remove spudholder and manifold from left

side of valve and plug from right side of valve.

f. Remove gas valve from mounting bracket.

39. BURNER TUBE Refer to Figure 2.

a. Remove control panel. b. Close gas shut-off valve. c. Disconnect union nut attaching nipple to

spudholder and remove spudholder.

d. Remove screws holding gas valve bracket to

stove assembly.

e. Remove screws holding burner tubes to stove

frame and remove burner tubes.

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

IMPORTANT: Make sure that spudholder and orifices are positioned such that gas will be injected directly down the center of the burners.

IMPORTANT: Purge air in the gas service line by operating the tumbler in drying mode. Use pipe compound resistant to action of Liquid Petroleum (L.P.) Gas on all pipe threads.

36 70269301

Page 37

SPARK

IGNITER

Section 5 Service Procedures

BURNER

TUBES

GAS VALVE

BRACKET

SPUD

HOLDER

MANIFOLD

FUSE

(Non-EU Models)

PIPE

IGNITION RESET

SWITCH

(EU Gas Models

Only)

GAS

VALV E

GAS SHUTOFF

VALVE

(EU Models)

TMB1244P

GAS SHUTOFF

VALV E

(Non-EU Models)

MAIN

HARNESS

IGNITION

CONTROL

HIGH VOLTAGE

LEAD

ICM RETURN

(Australian

Models)

CONTROL

TMB1256P

HARNESS

Figure 2

70269301 37

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.

W002

40. CONTACTORS AND TERMINAL BLOCK (Electric Models)

NOTE: Contactors and terminal blocks are located in contactor box at the rear of the tumbler.

a. Remove screw holding cover to contactor box

and remove cover.

b. Remove wires from contactor terminals and

terminal blocks.

NOTE: Refer to wiring diagram when rewiring contactors or terminal blocks.

c. Remove screws holding contactor to box. d. Remove two screws holding terminal block to

box.

NOTE: Use a 3 pole terminal block.

41. HEATER ELEMENT (Electric Models)

Refer to Figure 3. a. Remove two screws holding hood to top of

cabinet and lift hood assembly off heater housing.

b. Remove nuts, wires and jumper bars from

element terminals.

c. Remove four screws holding heater housing to

top of cabinet and remove heater from tumbler.

d. Turn heater housing upside down and remove

bottom guard retaining screws.

e. Remove two retaining screws from each of the

elements to be replaced.

NOTE: To remove top element, all elements must be removed. To remove center element, both center and bottom element must be removed.

f. Slide element forward until terminals clear rear

of heater housing.

g. Tilt element up and gently slide it out of

housing.

IMPORTANT: Bottom guard must be put back on bottom of housing before reinstalling heater on tumbler.

38 70269301

Page 39

JUMPER

BAR

Section 5 Service Procedures

NON-EU MODELS

HEATER

HOUSING

HOOD

ASSEMBLY

HEATER

CABLE

HIGH LIMIT

THERMOSTAT

HEATER

ELEMENT

JUMPER

WIRE

TMB1249P

EU MODELS

HEATER CABLE

HARNESSES

JUMPER

BAR

HIGH LIMIT

THERMOSTAT

HEATER

ELEMENT

JUMPER

WIRE

TMB1248P

Figure 3

70269301 39

Page 40

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. STOVE HIGH LIMIT THERMOSTAT (Gas Models)

a. Remove two screws holding thermostat and

bracket to rear side of stove. Refer to Figure 4.

b. Remove two screws holding cover to mounting

bracket. Refer to Figure 5. c. Disconnect wires from thermostat. d. Remove two screws holding thermostat to

mounting bracket. Refer to Figure 5.

SCREWS

JUNCTION

BOX

CONDUIT

NUT

SCREWS

Figure 4

STOVE

HIGH LIMIT

THERMOSTAT

T025SE1A

COVER

STOVE

HIGH LIMIT

THERMOSTAT

MOUNTING

BRACKET

SCREWS

TU026-SV

Figure 5

40 70269301

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

43. CABINET HIGH LIMIT THERMOSTAT Refer to Figure 6.

a. Disconnect electrical service to tumbler. b. Remove lint compartment door. c. Remove two screws holding thermostat

mounting bracket to cylinder shroud.

d. Remove two screws holding cover to mounting

bracket.

e. Disconnect two wires from thermostat.

f. Remove two screws holding thermostat to

mounting bracket.

CABINET

HIGH LIMIT

THERMOSTAT

g. To remove thermostat wire assembly.

(1) Pull wires through bushing in thermostat

mounting bracket and then push wire out through hole in back of lint compartment.

(2) Remove junction box cover from rear of

tumbler.

(3) Disconnect wires from inside of junction

box and pull wires from junction box.

NOTE: Refer to wiring diagram when reconnecting thermostat wires.

THERMISTOR

CABINET

HIGH LIMIT

BRACKET

COVER

THERMISTOR

BRACKET

TMB1806B

Figure 6

70269301 41

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

44. HIGH LIMIT THERMOSTAT (Electric Models)

a. Unlock and open control panel. b. Disconnect wires from thermostat. c. Remove two screws holding thermostat to front

of heater and remove thermostat. Refer to Figure 3.

NOTE: Refer to wiring diagram when rewiring thermostat.

45. THERMISTOR Refer to Figure 6.

a. Unlock and remove the lint panel. b. Remove two screws holding the perforated

cover to the thermistor bracket.

c. Disconnect the wires from the back of the

thermistor.

d. Unscrew thermistor from bracket.

NOTE: Refer to the wiring diagram when reconnecting the wires to the thermistor.

46. STEAM COILS

WARNING

Allow steam coils and valve to cool down before attempting any service procedures.

W249

a. Shut off inlet and outlet valves and disconnect

flex hoses from steam coils. b. Remove top cover pan. c. Remove screws holding cover to top of steam

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

frame. e. Remove steam coils by lifting straight up and

out of tumbler.

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

42 70269301

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.

W002

47. LOADING DOOR ASSEMBLY Refer to Figure 7.

a. Open loading door. b. Remove screw from lower hinge cam. c. While supporting lower hinge cam, raise door

to clear setscrew located in cam. d. Slide lower cam down and out of hinge lug. e. Lift door assembly up and out of hinge lug.

UPPER

HINGE CAM

DOOR

HINGE

LUG

Figure 7

SCREW

LOWER

HINGE CAM

T252SE1C

48. DOOR HINGE Refer to Figures 7 and 8.

a. Remove door assembly. b. Remove nuts and screws holding hinge to door

frame.

DOOR

FRAME

NUT

DOOR

HANDLE

DOOR

HANDLE

SCREW

Figure 8

HINGE

T301SE1B

49. LOADING DOOR HANDLE Refer to Figure 8.

a. Open loading door. b. Remove screws holding door handle to door

frame.

DOOR

FRAME

SCREW

70269301 43

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.

W002

50. FRONT PANEL

a. Remove control panel. b. Unlock, open and remove lint panel. Set aside

to prevent damage.

SCREWS

c. Remove loading door assembly. d. Support front panel and remove all screws

holding front panel to tumbler cabinet. Refer to Figure 9.

e. Disconnect door switch harness.

SCREWS

(4 Total)

Figure 9

44 70269301

TMB1553P

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.

51. AIRFLOW SWITCH

NOTE: The airflow switch is located on the lower left of the rear panel for electric models, on the rear plate of the stove for gas models.

a. Remove airflow switch box cover. Refer to

Figure 10.

b. Disconnect wires from switch. Refer to

Figure 11.

NOTE: Refer to wiring diagram when rewiring airflow switch.

DRIVE

GUARD

W002

DRIVE

GUARD

ATTA CHING

SCREWS

c. Remove screw(s) holding switch box to rear of

tumbler. Refer to Figure 11.

d. Remove two screws holding switch to

mounting bracket.

NOTE: After reinstalling airflow switch and mounting bracket into switch box, adjust switch. Refer to Adjustments section.

52. DRIVE GUARD Refer to Figure 10.

a. Support drive guard and remove screws

holding guard to rear of tumbler.

b. Reinstall drive guard.

53. DRIVE BELT Reversing Tumblers Refer to Figure 25.

a. Remove drive guard. b. Loosen cap screws attaching idler housing to

guide rails. Loosen jam nut on adjusting screw above idler and turn adjusting screw out. Raise idler housing and remove cylinder belts.

c. To remove drive belt after removing cylinder

belts:

(1) Remove two screws attaching reversing

motor belt guard to rear of cabinet and remove guard.

(2) Lift idler assembly and run belt off from

idler sheave.

AIRFLOW

SWITCH BOX

COVER

AIRFLOW

SWITCH

TMB1750S

Figure 10

(3) Remove upper portions of belt from motor

pulley, place it between the pulley and cabinet then push belt down below the

pulley. (4) Feed the belt over the cylinder pulley. (5) Remove the lower bolt attaching the idler

rails. (6) Pivot the bottom of the rails outward and

remove belt.

NOTE: When reinstalling belts, adjust cylinder belts then adjust drive belt. Refer to Adjustments section.

70269301 45

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.

MOUNTING

BRACKET

W002

SWITCH

BOX

SWITCH

LEVER

AIRFLOW

SWITCH

MOUNTING

SCREWS

Figure 11

54. DRIVE BELT Nonreversing Tumblers Refer to Figure 24.

a. Disconnect electrical service to tumbler. b. Remove drive guard. Refer to Figure 10.

Remove two screws holding belt guard assembly to motor bracket. Refer to Figure 12. Remove belt guard.

c. Loosen cap screws on idler housing. Drop idler

housing to bottom of slots by loosening jam nut by turning adjustment screw down.

d. Remove lower bolt and nut from guide rail.

Hinge guide rail out and slip belt out from under guide rails.

e. Slip new belt under guide rail and onto sheave

and motor pulley.

T037SE1A

SCREWS

MOTOR

BRACKET

TU039-SV

BELT

GUARD

Figure 12

46 70269301

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

55. IDLER SHAFT Refer to Figure 13.

a. Remove idler housing assembly. b. Remove sheave and drive pulley. c. Remove cap screws holding idler housing to

guide rails.

d. Support idler housing assembly and carefully

drive idler shaft from housing using a hammer and a hardwood dowel.

e. Support idler housing assembly and remove

bearings from housing using a hammer and a hardwood dowel.

IDLER

HOUSING

IDLER

SHAFT

f. Reinstall shaft and bearings.

IMPORTANT: When installing new bearings, apply a film of oil to the bearing cavity surfaces of the housing and the outside diameter of the bearings.

IMPORTANT: If a press is not available to install bearings, tap bearings into housing using a prylin hammer.

g. Reinstall drive guard.

NOTE: After installing sheave, adjust belt.

BEARINGS

BOLT

IDLER

HOUSING

ASSEMBLY

Figure 13

70269301 47

TMB1530P

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

56. TRUNNION HOUSING ASSEMBLY

a. Remove cylinder assembly. b. Remove upper guide rail bolt and nut. c. Remove four adjusting screws holding trunnion

housing assembly to rear of cabinet. Refer to Figure 14.

d. Remove four bearing retainer screws holding

the small bearing in housing. Refer to Figure 14.

e. Use a hammer and hardwood dowel to remove

bearings.

MOUNTING

SCREW (4 Total)

IMPORTANT: When installing new bearings, apply a film of oil to the bearing cavity surfaces in the housing and to the outside diameter of the bearings.

IMPORTANT: If a press is not available to install bearings, tap bearings into housing.

f. Reinstall drive guard on tumbler. Refer to

Figure 10.

ADJUSTING

SCREW (2 Total)

BEARING

RETAINER

SCREW (4 Total)

TRUNNION

HOUSING

BEARING

TMB1540_P

Figure 14

48 70269301

Page 49

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

57. TRUNNION SHAFT ASSEMBLY

Refer to Figure 15. a. Remove cylinder assembly.

b. Remove the four washers and nuts holding

trunnion shaft assembly to rear of cylinder.

IMPORTANT: When installing trunnion assembly on cylinder, the cylinder and shaft must be aligned. Refer to Figure 15 for an example of how to check for proper alignment of the shaft and cylinder. Measure the distance between the center of the

TAPE

MEASURE

trunnion shaft and the outer rim of the cylinder at the four points shown. If any measurement is lower than the highest point, place shim or shims (M401402) between trunnion channel and cylinder back until the measurement is equal to the highest point.

NOTE: After installing cylinder and shaft, adjust cylinder clearance. Refer to Adjustments section.

c. Reinstall drive guard on tumbler.

TRUNNION

ASSEMBLY

MEASURE AT

FOUR POINTS

CYLINDER

T089SE3C

Figure 15

70269301 49

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

58. MOTOR AND FAN ASSEMBLY Nonreversing Models

a. Disconnect wires from motor as follows:

(1) Remove cover plate from rear of motor. (2) Mark four wires and disconnect them from

motor terminals. (3) Loosen clamp screws in box connector. (4) While holding box, turn box connector out

of motor.

NOTE: Refer to wiring diagram when rewiring motor.

b. Remove upper belt. c. Loosen nut on upper guide rail bolt. Refer to

Figure 24.

d. Loosen nut on idler housing attaching bolt and

lower idler housing to bottom of slots. This is to put slack in drive belt, so it can be slipped off the motor pulley without risk of damage.

e. Remove two screws holding drive guard to

motor bracket and remove belt guard. Refer to Figure 12.

f. Remove nut and washer from lower guide rail

bolt. Refer to Figure 24.

NOTE: After removing belt, replace the lower guide rail bolt. Refer to Figure 17.

g. Slip drive belt off motor pulley. h. Remove the seven fan housing attaching

screws. Refer to Figure 16.

MOTOR

ATTA CHING

BOLT

(Both sides)

FAN HOUSING

ATTACHING

SCREWS

(7)

NUT AND

WASHER

CAP

SCREWS

MOTOR

JUNCTION

BOX

PLATE

NUT

AND

WASHER

MOTOR

ATTACHING

BOLT

(Both sides)

TU044-SV

Figure 16

i. Remove the two cap screws and two sets of nuts

and washers holding motor bracket to rear of tumbler cabinet. Refer to Figure 16.

j. Using the guide rails as supports, swing motor

and fan assembly out and away from rear of tumbler. Refer to Figure 17.

k. While supporting motor and fan assembly,

remove the lower guide rail bolt. Refer to Figure 24.

l. Remove four sets of nuts, washers and bolts

holding mounting bracket to motor. Refer to Figure 16.

50 70269301

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.

m. Remove locknut and jam nut holding fan on

motor shaft. Refer to Figure 18. Pull fan off motor shaft.

NOTE: Fan is keyed to motor shaft and may have to be removed using a puller. Look for a spacer washer at the bottom of the fan keyway. Take care to avoid losing or damaging the spacer washer.

n. Remove spacer washer from motor shaft. Refer

to Figure 18.

LOWER

GUIDE RAIL

BOLT

o. Loosen two setscrews holding motor pulley to

motor shaft. Refer to Figure 18. Remove motor pulley.

W002

Figure 17

NOTE: A puller may be required to remove pulley from motor shaft.

NOTE: After installing motor and fan assembly, adjust belt.

MOTOR

AND FAN

ASSEMBLY

T045SE3A

70269301 51

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

59. FAN AND MOTOR ASSEMBLY Reversing Models

a. Disconnect wires from motor as follows:

(1) Remove cover plate from rear of motor. (2) Mark four wires and disconnect them from

motor terminals. (3) Loosen clamp screws in box connector. (4) While holding box, turn box connector out

of motor.

NOTE: Refer to wiring diagram when rewiring motor.

b. Remove nut and washer from lower guide rail

bolt. Refer to Figure 24.

c. Remove the seven fan housing cover attaching

screws. Refer to Figure 16.

d. Remove the two cap screws and two sets of nuts

and washers holding motor bracket to rear of tumbler cabinet. Refer to Figure 16.

FAN HOUSING

SPACER

WASHER

COVER

e. Using the guide rails as supports, swing motor

and fan assembly out and away from rear of tumbler. Refer to Figure 17.

f. While supporting motor and fan assembly,

remove the lower guide rail bolt. Refer to Figure 24.

g. Remove four sets of nuts, washers and bolts

holding mounting bracket to motor. Refer to Figure 16.

h. Remove locknut and jam nut holding fan on

motor shaft. Refer to Figure 18. Pull fan off motor shaft.

NOTE: Fan is keyed to motor shaft and may have to be removed using a puller. Look for a spacer washer at the bottom of the fan keyway. Take care to avoid losing or damaging the spacer washer.

i. Remove spacer washer from motor shaft. Refer

to Figure 18.

FAN

KEY

MOTOR

PULLEY

JAM NUT

MOTOR

PULLEY

FAN

LOCKNUT

Figure 18

52 70269301

KEY

T046SE3A

Page 53

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

60. CYLINDER DRIVE MOTOR Reversing Tumblers Refer to Figure 19.

a. Support drive guard and remove the screws

holding it to the back panel of the tumbler.

b. Loosen locking bolt and back adjusting screw

out to loosen belt. Refer to Figure 25. c. Slip drive belt off of the motor pulley. d. Disconnect the wire harness from motor.

PULLEY

e. Remove the four cap screws, nuts, lockwashers

and flat washers holding the motor to the mounting bracket.

f. Loosen the setscrews in the motor pulley and

remove pulley by using a suitable puller.

NOTE: Refer to wiring diagram when rewiring the motor.

g. After installing motor, adjust drive belt tension,

and adjust motor position on mounting bracket.

SCREW

LOCKWASHER

FLAT

WASHER

CYLINDER

DRIVE

MOTOR

MOUNTING

BRACKET

ADJUSTING

BOLT

TMB1689P

Figure 19

70269301 53

Page 54

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.

61. LEVELING LEGS Refer to Figure 20.

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.

W002

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 the front and rear of top panel.

NOTE: Keep the tumbler as close to the floor as possible. All four legs must rest firmly on the floor so weight of tumbler is evenly distributed. Tumbler must not rock.

T451I

Figure 20

70269301 55

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.

W002

62. MAIN GAS BURNER AIR INLET SHUTTERS (All Gas Models) Refer to Figure 21.

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.

W281

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 air supplied to the burner while closing the shutter decreases the air supply. Adjust air shutter as follows:

a. Unlock and remove the access door. b. Start the 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 right of the heater section. Too little air is indicated if the flame is yellow, lazy and smoky.

c. To adjust the air inlet shutter, loosen adjusting

screws.

d. Push or pull shutters in or out as necessary to

obtain desired flame intensity.

e. After shutter is adjusted, tighten locking screw

securely.

f. If the shutter is correctly adjusted, but the flame

pattern is straight up, insufficient air is flowing through the tumbler and airflow switch is improperly set. A flame pattern that flares to the right and left indicates that no air is flowing through the tumbler. Adjust airflow switch.

PROPER

AIRFLOW

AIR SHUTTER

ADJUSTING SCREWS

56 70269301

INSUFFICIENT

AIRFLOW

AIR SHUTTER

ADJUSTING SCREWS

Figure 21

NO AIRFLOW

AIR SHUTTER

ADJUSTING SCREWS

TMB1780S

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

63. AIRFLOW SWITCH Gas and Electric Tumblers Refer to Figure 22.

WARNING

To reduce the risk of fire, airflow switch operation may be affected by a clogged lint screen, lack of make-up air, obstructions at the thimble or in the customer installed main or collector ducts. These conditions must be checked and necessary corrections made before adjusting airflow switch. Always adjust airflow at installation.

W474

The airflow switch (located on the rear of tumbler, Figure 22, is set at the factory for proper operation. However, if there is a problem with the switch, it should be adjusted as follows:

NOTE: Steam models do not have an airflow switch.

NOTE: Control panel must be in place and access door closed before attempting to adjust airflow switch.

IMPORTANT: Airflow switch disc 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 opened.

The airflow switch operation is controlled by the counterweight position on the shaft. Moving the counterweight either increases or decreases airflow switch sensitivity. The counterweight should be adjusted so the disc moves away from the cabinet when the lint panel is opened 1-1/2 in. (38.1 mm) with a full load. Adjust the airflow switch as follows:

a. Load the tumbler. This adjustment is much

faster to make with one person opening lint panel in front and another adjusting the counterweight in the rear of tumbler.

b. Temporarily tape down the lint panel safety

switch located behind the upper right corner of the lint panel.

c. Start the tumbler. Open the lint panel 1-1/2 in.

(38.1 mm). The airflow disc should move away from the cabinet, opening the switch contacts and shutting off the heat system. This indicates proper operation and proper adjustment.

d. If switch is not opening as described in step 3,

it should be adjusted so it is MORE sensitive. Depress the spring clip and move counterweight toward disc. Retest by opening lint panel and continue moving counterweight toward disc until switch operates as described in Step c.

e. If switch opens BEFORE lint panel is opened

the proper distance, step 3, it should be adjusted so it is LESS sensitive. Depress the spring clip and move counterweight away from the disc. Retest by opening lint panel and continue moving counterweight away from disc until switch operates as described in Step c.

IMPORTANT: Remove tape from lint panel switch.

70269301 57

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

AIR FLOW

SWITCH

COUNTERWEIGHT

MOUNTING

BRACKET

SWITCH

LEVER

DISC

SPRING

CLIP

Figure 22

REAR

PANEL OF

TUMBLER

AIR FLOW

SWITCH

VANE

LEVER

ARM

DISC

SWITCH

ADJUSTING

SCREWS

SCREW

SWITCH

LEVER

SPRING

CLIP

COUNTERWEIGHT

T041IE3A

58 70269301

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.

W002

64. LOADING DOOR STRIKE Refer to Figure 23.

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 acorn nut and turn door strike screw in or out as required. Retighten acorn nut.

DOOR

STRIKE

ACORN

NUT

DOOR

LATCH

65. DRIVE BELT TENSION

Proper tension is when drive belt can be depressed 1/2 inch (12.7 mm) by applying light thumb pressure (approximately 5 pounds) at a point midway between sheave and motor pulley.

Reversing Belt Drive Models: Proper tension is when each cylinder belt can be depressed approximately 3/16 inch (4.77 mm) by applying light thumb pressure (approximately 5 pounds) at a point midway between the sheave and the idler.

Nonreversing Models: Refer to Figure 24.

a. Remove guard from rear of tumbler. b. Loosen idler housing capscrews holding idler

housing to the housing support.

c. Position housing assembly by turning adjusting

bolt until proper belt tension is reached, then retighten idler housing capscrews.

d. Replace guard on rear of tumbler.

Reversing Models: Refer to Figure 25.

a. Remove guard from rear of tumbler. b. To adjust cylinder belt tension, loosen idler

housing bolts holding idler housing assembly to the housing support.

c. Position housing assembly by turning adjusting

bolt until proper belt tension is reached, then retighten idler housing bolts.

NOTE: Adjust cylinder belt tension first, then adjust motor to idler belt tension. Refer to Figure 25.

d. Loosen the locking bolt.

T048IE1A

Figure 23

e. Loosen the adjusting nut and use the adjusting

screw to move the motor up or down.

f. Once proper belt tension is reached, retighten

the adjusting nut and locking bolt.

g. Replace the guard on rear of tumbler.

70269301 59

Page 59

Section 6 Adjustments

NONREVERSING

TRUNNION HOUSING

ADJUSTING BOLTS

POLY

V-BELT

(Self-adjusting)

IDLER

HOUSING

BOLTS

(2)

ADJUSTING

BOLT

DRIVE

V-BELT

TRUNNION

HOUSING

BOLTS

IDLER

HOUSING

ASSEMBLY

GUIDE

RAILS

T234IE3F

Figure 24

60 70269301

Page 60

REVERSING

DRIVE

BELT

Section 6 Adjustments

LOCKING

BOLT

ADJUSTING

BOLT

(Not Shown)

IDLER

HOUSING

BOLTS

(2)

ADJUSTING

NUT

ADJUSTING

SCREW

CYLINDER

BELTS

IDLER

HOUSING

ASSEMBLY

T322IE3A

Figure 25

70269301 61

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.

W002

66. 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.

a. Open loading door and check the gap between

the center of the front panel top flange and the cylinder rim. Proper adjustment is when the gap is 1/2 - 3/4 inch (12.7 - 19.05 mm). Refer to

Figure 26. b. Remove drive guard. c. Loosen the four trunnion housing bolts. Refer

to Figure 24. d. Loosen the locknuts on the trunnion housing

adjusting bolts. Refer to Figure 24.

CYLINDER

RIM

e. Turn the adjusting bolts in or out as necessary

to obtain proper clearance between cylinder rim and front panel.

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

f. After the cylinder is properly adjusted, tighten

the adjusting bolt locknuts and the four trunnion housing bolts.

g. Install the belt guard removed in Step b.

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

INSIDE FRONT OF CYLINDER

1/2 - 3/4 Inch

(12.7 - 19.05 mm)

CYLINDER RIM /

FRONT PANEL

FLANGE

CLEARANCE

T218SE3C

FRONT PANEL

FRONT

PANEL FLANGE

(Top Shown)

9/32" ± 1/32"

FORE / AFT

CLEARANCE

Figure 26

62 70269301

ALLIANCE GU050N, HA050L, HA050N, HT050L, HT050N Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Table of Contents

Safety Information

Introduction

Model Identification

Troubleshooting

Grounding

Service Procedures

Adjustments