Alliance Laundry Systems | PT170N | Service manual | Alliance Laundry Systems PT170N Service manual

D77
SERVICE MANUAL
PUBLICATION DATE: 10/03
70276101
INDUSTRIAL DRYERS
Table of Contents
Section 1 – Safety Information
Locating An Authorized Service Person .................4
Section 2 – Introduction
Model Identification ................................................5
Customer Service ....................................................6
Serial Plate Location ...............................................6
Safety Warnings and Decals ...................................7
Safety Precautions for Servicing Tumblers ............7
Section 3 – Troubleshooting
1. Motor Does Not Start .......................................9
2. Motor Overload Protector Cycles
Repeatedly ......................................................10
3. Motor Runs But Cylinder Does Not Turn ......10
4. Motor Does Not Stop .....................................10
5. Gas Burner Does Not Ignite - Gas Models ....11
6. Burner Ignites And Goes Out Repeatedly
- Gas Models ..................................................12
7. Burner Shuts-off Prematurely - Gas Models .12
8. Burner Repeatedly Cycles Off On High Limit
Thermostat - Gas Models ...............................13
9. Steam Valve Or Gas Burner Does Not
Shut-off .........................................................13
10. Clothes Do Not Dry .......................................13
11. Tumbler Overheating .....................................14
12. Burners Not Burning Properly - Gas Models 14
13. Loading Door Opens During Operation ........14
14. Tumbler Runs But No Steam To Coils
- Steam Models ..............................................15
15. Water In Steam Line - Steam Models ............15
16. Tumbler Will Not Start, Time On Drying
Timer, Door Closed ........................................16
17. Motor Runs But No Heat ...............................17
18. Cylinder Turns, But Will Not Heat ................18
Section 4 – Grounding
19. Grounding Instructions ..................................21
Section 5 – Service Procedures
20. Access Panel/Interior Control Box ................23
21. Control Fuse Holder .......................................23
22. Control Fuse ...................................................23
23.
24.
25.
26.
27.
28.
29.
30.
31.
32.
33.
34.
35.
36.
37.
38.
39.
40.
41.
42.
43.
44.
45.
46.
47.
Signal Buzzer .................................................24
Load Ready Light ..........................................25
Ignition Reset Switch .....................................25
Emergency Stop Switch .................................25
Push-to-start Switch .......................................25
Cool Down and Heat Lights ..........................25
Cool Down and Heat Timers .........................27
Relay ..............................................................27
Reversing/Nonreversing Switch ....................27
Temperature Switch .......................................27
Temperature Control Board ...........................28
Electronic Control ..........................................28
Loading Door Assembly ................................30
Loading Door Handle ....................................30
Loading Door Switch .....................................30
Front Panel .....................................................31
Loading Door Hinge Lug ...............................33
Thermistor ......................................................33
Lint Panel Switch ...........................................34
Gas Valve .......................................................35
Igniter .............................................................35
Ignition Control ..............................................35
Burner Tube ...................................................35
Stove High Limit Thermostat ........................37
Cabinet High Limit Thermostat / Load Ready
Thermostat .....................................................37
48. Steam Coils ....................................................38
49. Drive Guard Cover / Corner Drive Guard .....39
50. Airflow Switch ...............................................40
51. Cylinder Belts ................................................41
52. Drive Belt .......................................................41
53. Step Pulley Assembly ....................................41
Critical Torques ....................................................42
54. Cylinder Sheave .............................................43
55. Motor Pulley ..................................................44
56. Jackshaft Assembly ........................................44
57. Cylinder Assembly ........................................44
58. Trunnion Bearings .........................................45
59. Fan Belt ..........................................................46
60. Fan Motor Pulley ...........................................46
61. Fan Pulley ......................................................46
62. Fan Motor ......................................................47
(continued)
70276101
1
63.
64.
65.
66.
67.
68.
69.
70.
Fan Assembly .................................................47
Trunnion Shaft Assembly ..............................49
Cylinder Drive Motor ....................................50
Reversing Timer .............................................52
Reversing Contactor .......................................52
Fan Motor Contactor ......................................52
Transformer ....................................................52
Exhaust System Components .........................52
Section 6 – Adjustments
71.
72.
73.
74.
75.
76.
77.
78.
Leveling .........................................................53
Main Gas Burner Air Inlet Shutters ...............54
Airflow Switch ...............................................55
Loading Door Strike ......................................55
Cylinder Belt Tension ....................................56
Drive Belt Tension .........................................57
Fan Belt Tension ............................................58
Cylinder Clearance .........................................59
Section 7 – Wiring Schematics
Manual Timer Models
208-230 VAC, 60 Hertz, 3 Phase Gas ................62
380-415 VAC, 50 Hertz, 3 Phase Gas ................63
460 VAC, 60 Hertz, 3 Phase Gas .......................64
208-240 VAC, 60 Hertz, 3 Phase Steam ............65
380-415 VAC, 50 Hertz, 3 Phase Steam ............66
460 VAC, 60 Hertz, 3 Phase Steam....................67
AT, HT, PT, ST, UT, WT and XT Micro Control
RM Models
208-230 VAC, 60 Hertz, 3 Phase Gas ................68
380-415 VAC, 50 Hertz, 3 Phase Gas ................69
HA, PA, SA and UA Micro Control RM Models
380-415 VAC, 50 Hertz, 3 Phase Gas ................70
AT, HT, PT, ST, UT, WT and XT Micro Control
RM Models
460-480 VAC, 60 Hertz, 3 Phase Gas ................71
208-230 VAC, 60 Hertz, 3 Phase Steam ............72
380-415 VAC, 50 Hertz, 3 Phase Steam ............73
HU, PU, SU, UU and XU Micro Control RM Models
380-415 VAC, 50 Hertz, 3 Phase Steam ............74
AT, HT, PT, ST, UT, WT and XT Micro Control
RM Models
460-480 VAC, 60 Hertz, 3 Phase Steam ............75
2
70276101
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.
70276101
3
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.
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.
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
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
70276101
Section 2
Introduction
Model Identification
Information in this manual is applicable to these models:
Gas
AT170L
AT170N
HA170L
HA170N
HT170L
HT170N
HU170L
HU170N
PA170L
PA170N
PT170L
PT170N
PU170L
PU170N
SA170L
Steam
SA170N
ST170L
ST170N
SU170L
SU170N
UA170L
UA170N
UT170L
UT170N
UU170L
UU170N
WT170L
WT170N
XT170L
XT170N
XU170N
AT170S
HT170S
HU170S
PT170S
PU170S
ST170S
SU170S
UT170S
UU170S
WT170S
XT170S
XU170S
Includes models with the following control suffixes (7th and 8th characters):
RM – reversing OPL micro
RT – reversing manual timer
70276101
5
Section 2 Introduction
Customer Service
If literature or replacement parts are required, contact
the source from whom the machine was purchased or
contact Alliance Laundry Systems at (920) 748-3950
for the name and address of the nearest authorized
parts distributor.
For technical assistance, call (920) 748-3121.
Serial Plate Location
When calling or writing about your product, be sure to
mention model and serial numbers. Model and serial
numbers are located on serial plate as shown.
SERIAL
PLATE
JUNCTION BOX
COVER
TMB1765S
6
70276101
Section 2 Introduction
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
• Disconnect electrical service.
• Shut off supply gas valve before servicing gas
components.
• Access panel MUST be reinstalled after
inspection or servicing of tumbler is completed.
• Use a non-corrosive leak detecting compound to
check all pipe connections for gas leaks. DO NOT
USE AN OPEN FLAME TO CHECK FOR GAS
LEAKS!
• Belt guard MUST be reinstalled after inspection
or servicing of tumbler is completed.
• Contactor box cover MUST be reinstalled after
inspection or servicing of electric and/or reversing
tumbler is completed.
• Loading door switch MUST be operational before
putting tumbler into service.
• Junction box cover MUST be reinstalled after
inspection or servicing of tumbler is completed.
70276101
7
Section 2 Introduction
Notes
8
70276101
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.
W002
IMPORTANT: Refer to appropriate wiring diagram for aid in testing tumbler components.
1. MOTOR DOES NOT START
POSSIBLE CAUSE
TO CORRECT
Electrical power off, circuit breaker tripped or
blown control fuse.
Inoperative transformer.
Loading door not closed or inoperative door switch.
Lint panel switch inoperative.
Trunnion bearings binding.
Start circuit not completed.
• Check power supply, reset breaker, or replace fuses.
•
•
•
•
•
Idler shaft binding.
Inoperative motor.
Inoperative relay.
Timer improperly set.
Inoperative timer.
Broken, loose or incorrect wiring.
•
•
•
•
•
•
70276101
Replace transformer.
Close door, or test switch and replace if inoperative.
Replace or adjust lint panel switch.
Replace trunnion bearings.
Press start switch, or test switch and replace if
inoperative.
Replace bearings.
Have motor tested and replace if inoperative.
Replace relay.
Turn drying timer clockwise to desired setting.
Test timer and replace if inoperative.
Refer to wiring diagram located on back of tumbler or in
literature packet.
9
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.
W002
2. MOTOR OVERLOAD PROTECTOR CYCLES REPEATEDLY
POSSIBLE CAUSE
TO CORRECT
Incorrect voltage.
• Refer to the Installation Manual for electrical
requirements.
• Remove part of load.
• Check cylinder for binding. Refer to Adjustment Section
in this manual for cylinder adjustment.
• Electrician should verify that wiring and voltage is
adequate.
• Refer to Installation Manual for make-up air
requirements.
• Clean lint accumulation on and around the motor.
• Refer to wiring diagram located on back of tumbler or in
literature packet.
Clothes load too large.
Clothes cylinder is binding.
Inadequate wiring.
Inadequate make-up air.
Poor maintenance.
Broken, loose or incorrect wiring.
3. MOTOR RUNS BUT CYLINDER DOES NOT TURN
POSSIBLE CAUSE
TO CORRECT
Motor drive pulley loose.
Broken or loose cylinder belt.
Broken or loose drive belt.
Cylinder is binding.
•
•
•
•
Tighten drive pulley bushing screws.
Replace or adjust belts.
Replace or adjust belt.
Check cylinder for binding. Refer to Adjustment Section
in this manual for proper cylinder adjustment.
4. MOTOR DOES NOT STOP
POSSIBLE CAUSE
TO CORRECT
Inoperative door switch.
Inoperative timer.
Incorrect wiring.
• Test switch and replace if inoperative.
• Test timer and replace if inoperative.
• Refer to wiring diagram located on back of tumbler or in
literature packet.
• Test contactor and replace if inoperative.
Inoperative motor contactor.
10
70276101
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.
W002
5. GAS BURNER DOES NOT IGNITE - GAS MODELS
POSSIBLE CAUSE
TO CORRECT
Improper or inadequate exhaust system.
• Refer to the Installation Manual for exhaust system
requirements.
• Set drying timer or replace if inoperative.
• Test thermostats and replace if inoperative.
• Open partially closed gas shut-off valve, or correct low
gas pressure. Check manifold pressure and adjust to
pressure specified on rating place. If pressure cannot be
obtained, have gas supplier check main pressure.
• Tumbler is equipped for type of gas specified on serial
plate. If orifices are different from that specified on serial
plate, obtain and install proper orifices.
• Test igniter and replace if inoperative.
• Test igniter control and replace if inoperative.
• Test coils and replace if inoperative.
• Clean lint compartment after every eight hour shift.
Check damper for lint accumulation. Check ductwork for
lint build-up.
• Refer to Installation Manual to ensure that ductwork and
make-up air openings are sized properly.
• Test switch and replace if inoperative.
• Open lint door panel, place lint door and panel back on
tumbler (ensuring a tight fit).
• Refer to wiring diagram located on back of tumbler or in
literature packet.
• May be due to improper wiring resulting in low airflow.
Refer to Installation Manual.
Drying timer not selected or inoperative.
Inoperative thermostats.
Insufficient gas supply.
Incorrect orifices.
Inoperative igniter.
Inoperative igniter control.
Inoperative gas valve coils.
Lint buildup.
Inadequate ductwork and make-up air.
Inoperative airflow switch.
Lint door panel not closed properly.
Broken, loose or incorrect wiring.
Improper fan rotation.
70276101
11
Section 3 Troubleshooting
WARNING
To reduce the risk of electric shock, fire, explosion, serious injury or death:
• Disconnect electric power to the tumbler before servicing.
• Close gas shut-off valve to gas tumbler before servicing.
• Close steam valve to steam tumbler before servicing.
• Never start the tumbler with any guards/panels removed.
• Whenever ground wires are removed during servicing, these ground wires must be
reconnected to ensure that the tumbler is properly grounded.
W002
6. BURNER IGNITES AND GOES OUT REPEATEDLY - GAS MODELS
POSSIBLE CAUSE
TO CORRECT
Insufficient gas pressure.
• Check gas supply and pressure. A low flame will not
maintain sensor conductivity.
Burner ports plugged.
• Check burner tubes for build-up.
Improper or inadequate exhaust system or make-up • Refer to Installation Manual for exhaust and make-up air
air
requirements.
Inoperative high limit or cabinet limit thermostat.
• Test thermostat and replace if inoperative.
Improper orifices.
• Tumbler is equipped for type of gas specified on serial
plate. If orifices are different from that specified on serial
plate, obtain and install proper orifices.
7. BURNER SHUTS-OFF PREMATURELY - GAS MODELS
POSSIBLE CAUSE
TO CORRECT
Improper or inadequate exhaust and/or make-up air • Refer to Installation Manual for exhaust and make-up air
system.
requirements.
Insufficient gas supply.
• Open partially closed gas shut-off valve, or correct low
pressure.
Tumbler not properly equipped for type of gas used • Tumbler is equipped for type of gas specified on serial
or altitude.
plate. If not properly equipped for gas type and altitude,
obtain and install correct components.
Improperly adjusted burner flame.
• Refer to Adjustment Section in this manual for burner
flame adjustment.
Cycling off on high limit thermostat.
• Refer to Paragraph 8.
Broken, loose or incorrect wiring.
• Refer to wiring diagram located on back of tumbler or in
literature packet.
Improper fan rotation.
• May be due to improper wiring resulting in low airflow.
Refer to Installation Manual.
Inoperative gas valve coils.
• Test coils and replace if inoperative.
12
70276101
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.
W002
8. BURNER REPEATEDLY CYCLES OFF ON HIGH LIMIT THERMOSTAT - GAS MODELS
POSSIBLE CAUSE
TO CORRECT
External exhaust system is longer than
recommended or inadequate make-up air.
Clogged lint screen.
• Refer to Installation Manual for exhaust and make-up air
requirements.
• Remove screen and clean. Lint screen and compartment
should be cleaned after every eight hour shift.
• Disassemble tumbler ductwork and clean.
• Disassemble exhaust system and clean.
• Replace thermostat.
Lint in internal tumbler ductwork.
Lint in external exhaust system.
High limit thermostat cycling at too low a
temperature.
Lint door panel not closed properly.
• Remove lint door panel - place lint door panel back on
tumbler (ensuring a tight fit).
9. STEAM VALVE OR GAS BURNER DOES NOT SHUT-OFF
POSSIBLE CAUSE
TO CORRECT
Impurities on gas valve or steam valve seat,
preventing valve from closing.
Inoperative drying timer or control relay.
Incorrect wiring.
• Disassemble and clean steam valve or replace steam
valve.
• Replace timer or control relay.
• Refer to wiring diagram located on back of tumbler or in
literature packet.
10. CLOTHES DO NOT DRY
POSSIBLE CAUSE
TO CORRECT
Heat source inoperative.
Too much water in articles being dried.
Clothes load too large.
• Refer to Paragraph 17.
• Remove excess water.
• Remove part of load. 170 pounds dry weight (AHAM
cotton load) is a maximum load.
• Refer to Installation Manual for exhaust requirements.
• Refer to Paragraph 16.
• Set selector for higher setting.
• Refer to Installation Manual for electrical requirements.
• Refer to Installation Manual for make-up air
requirements.
• May be due to improper wiring resulting in low airflow.
Refer to Installation Manual.
Improper or inadequate exhaust system.
Heat source shuts-off prematurely.
Drying timer improperly set.
Incorrect voltage.
Inadequate make-up air.
Improper fan rotation.
70276101
13
Section 3 Troubleshooting
WARNING
To reduce the risk of electric shock, fire, explosion, serious injury or death:
• Disconnect electric power to the tumbler before servicing.
• Close gas shut-off valve to gas tumbler before servicing.
• Close steam valve to steam tumbler before servicing.
• Never start the tumbler with any guards/panels removed.
• Whenever ground wires are removed during servicing, these ground wires must be
reconnected to ensure that the tumbler is properly grounded.
W002
11. TUMBLER OVERHEATING
POSSIBLE CAUSE
TO CORRECT
Gas Models: Incorrect main burner orifices.
Gas Models: Gas pressure too high.
Steam Models: Steam solenoid valve stuck open.
Inadequate make-up air.
•
•
•
•
Lint accumulation.
Restricted or inadequate exhaust system.
Inoperative thermostat.
Replace orifices.
Adjust gas pressure as specified on serial plate.
Clean solenoid valve and replace if necessary.
Refer to Installation Manual for make-up air
requirements.
• Remove lint.
• Remove obstruction or lint build-up from exhaust
ductwork. Refer to the Installation Manual for exhaust
system requirements.
• Replace thermostat.
12. BURNERS NOT BURNING PROPERLY - GAS MODELS
POSSIBLE CAUSE
TO CORRECT
Burner air shutters incorrectly adjusted.
• Refer to Adjustment Section in this manual for proper
flame adjustment.
• Disassemble burners and remove obstruction.
• Check serial plate on back of the tumbler for correct gas
pressure.
• Tumbler is equipped for type of gas specified on serial
plate. If orifices are different from that specified on serial
plate, obtain and install proper orifices.
• Disassemble and clean exhaust system.
• Check adjustment and replace airflow switch if necessary.
• May be due to improper wiring resulting in low airflow.
Refer to Installation Manual.
Foreign material in burners.
Gas pressure too high.
Incorrect orifices.
Restricted or blocked exhaust duct.
Airflow switch not functioning properly.
Improper fan rotation.
13. LOADING DOOR OPENS DURING OPERATION
POSSIBLE CAUSE
TO CORRECT
Door strike improperly adjusted.
• Refer to Adjustment Section in this manual for door strike
adjustment.
• Refer to Adjustment Section in this manual for leveling
adjustment.
Tumbler improperly leveled.
14
70276101
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.
W002
14. TUMBLER RUNS BUT NO STEAM TO COILS - STEAM MODELS
POSSIBLE CAUSE
TO CORRECT
Shut-off valve closed.
• Check all valves in supply and return lines, make sure
they are open.
• Remove trap and clean. Replace if inoperative.
• Check operation of solenoid valve.
• Check for inlet and outlet markings on check valve, and
invert if necessary.
• Remove strainer and clean.
Blocked steam trap.
Inoperative solenoid valve.
Incorrect installation of check valve.
Clogged strainer.
15. WATER IN STEAM LINE - STEAM MODELS
POSSIBLE CAUSE
TO CORRECT
Incorrect installation of steam piping.
Trap functioning improperly.
• Refer to Installation Manual for steam requirements.
• Check trap for size and capacity. If trap is dirty or sluggish
clean thoroughly or replace. Check return line for high
back pressure. Check trap for proper installation. Refer to
Installation Manual for requirements.
70276101
15
Section 3 Troubleshooting
WARNING
To reduce the risk of electric shock, fire, explosion, serious injury or death:
• Disconnect electric power to the tumbler before servicing.
• Close gas shut-off valve to gas tumbler before servicing.
• Close steam valve to steam tumbler before servicing.
• Never start the tumbler with any guards/panels removed.
• Whenever ground wires are removed during servicing, these ground wires must be
reconnected to ensure that the tumbler is properly grounded.
W002
16. TUMBLER WILL NOT START, TIME ON DRYING TIMER, DOOR CLOSED
CHECK FOR
YES
LINE VOLTAGE
INTO
TRANSFORMER
CHECK FOR
CONTROL
(24 VAC)
VOLTAGE
OUT OF
TRANSFORMER
NO
YES
CHECK FOR
BLOWN
CONTROL
CIRCUIT FUSE
NO
CHECK FOR
BROKEN WIRE
BETWEEN
FUSE AND LINT
PANEL SWITCH
YES
CHECK FOR
24 VOLTS
OUT OF LINT
PANEL
SWITCH
YES
YES
NO
REPLACE
DOOR SWITCH
CHECK FOR
24 VOLTS
ACROSS COIL
TERMINALS
OF CONTROL
RELAY
YES
CHECK FOR
24 VOLTS ON
TERMINAL B OF
DRYING TIMER
NO
NO
REPLACE
TIMER
REPLACE OR
ADJUST LINT
PANEL SWITCH
CHECK FOR
24 VOLTS ON
TERMINAL 1
OF CONTROL
RELAY
YES
CHECK FOR
24 VOLTS INTO
PUSH-TO-START
SWITCH
NO
NO
REPLACE
RELAY
16
CHECK FOR
BROKEN WIRE
FROM CONTROL
RELAY
TERMINAL 1
YES
YES
NO
CHECK FOR
BROKEN WIRE
OR POOR
CONNECTION AT
HARNESS PLUG
CHECK FOR
LINT PANEL
SWITCH
FUNCTIONING
PROPERLY
CHECK FOR
DOOR SWITCH
FUNCTIONING
PROPERLY
CHECK FOR
BROKEN WIRE
BETWEEN
FUSE AND
DOOR SWITCH
CHECK FOR
24 VOLTS AT
TERMINAL 3 OF
CONTROL RELAY
YES
NO
NO
NO
CHECK FOR 24
VOLTS OUT OF
DOOR SWITCH
NO
REPLACE
FUSE
REPLACE
TRANSFORMER
CHECK FOR
24 VOLTS INTO
LINT PANEL
SWITCH
CHECK FOR
24 VOLTS
INTO DOOR
SWITCH
YES
NO
CHECK
ELECTRICAL
SERVICE
TO TUMBLER
(Fuses/Circuit
Breaker)
NO
PRESS PUSH-TOSTART SWITCH. YES
CHECK FOR 24
VOLTS OUT OF
PUSH-TO-START
SWITCH
NO
REPLACE
PUSH-TO-START
SWITCH
CHECK FOR
24 VOLTS
ACROSS FAN
CONTACTOR
COIL
YES
REPLACE
FAN
CONTACTOR
NO
CHECK FOR
BROKEN WIRE
OR POOR
CONNECTION AT
HARNESS PLUG
70276101
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.
W002
17. MOTOR RUNS BUT NO HEAT
IGNITER
SPARKING
NO
IEI CONTROL
IN SAFETY
LOCKOUT
YES
YES
NO
RESISTANCE OF
HIGH VOLTAGE
LEAD GREATER
THAN 28,000 OHMS
OR LESS THAN
10,500 OHMS
OPEN AND CLOSE
DOOR
GREEN WIRE
FROM IEI
CONTROL
CONNECTED TO
GROUND
TERMINAL
YES
IGNITER GAP IS NOT
5/32 INCH (.397 CM)
OR CERAMIC
CRACKED
NO
REPLACE
IEI CONTROL
YES
REGAP OR
REPLACE
IGNITER
REPLACE
HIGH VOLTAGE
LEAD
YES
GAS SHUT-OFF
VALVE TURNED ON
NO
NO
NO
CONNECT GREEN
WIRE TO GROUND
TERMINAL
TURN ON
GAS SHUT-OFF
VALVE
YES
24 VOLTS
NO
PRESENT ON
WHITE/BLACK WIRE
FROM IEI CONTROL
REPLACE
IEI CONTROL
YES
CHECK GAS VALVE YES
COIL FOR OPEN
CIRCUIT
70276101
REPLACE
GAS VALVE
OR COIL
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.
W002
18. CYLINDER TURNS, BUT WILL NOT HEAT
AIRFLOW SWITCH
STAYS OPEN
YES
FAN TURNING COUNTERCLOCKWISE AS VIEWED
FROM THE FRONT
REFER TO INSTALLATION MANUAL
FOR MAKEUP AIR AND EXHAUST DUCT
REQUIREMENTS
YES
NO
REVERSE ANY TWO OF THE
ELECTRICAL SERVICE LEADS AT
THE FAN MOTOR CONTACTOR.
NO
GAS SHUT-OFF
VALVE OPEN
NO
OPEN GAS SHUT-OFF VALVE
YES
24 VOLTS PRESENT AT
OUTPUT TERMINAL OF
TEMPERATURE CONTROL BOARD
YES
CHECK FOR BROKEN OR LOOSE
WIRE TO IGNITION CONTROL
YES
REPLACE THERMISTOR OR
TEMPERATURE CONTROL BOARD
YES
CHECK FOR BROKEN OR LOOSE
WIRE TO MAIN THERMOSTAT
YES
24 VOLTS PRESENT ACROSS COIL
TERMINALS OF RELAY
YES
CHECK FOR BROKEN OR
LOOSE WIRE TO RELAY
YES
REPLACE STOVE HIGH LIMIT
THERMOSTAT
NO
24 VOLTS PRESENT AT
INPUT TERMINAL OF
TEMPERATURE CONTROL BOARD
NO
24 VOLTS PRESENT AT
TERMINAL 4 OF RELAY
NO
24 VOLTS PRESENT AT
TERMINAL 6 OF RELAY
YES
REPLACE
RELAY
NO
24 VOLTS PRESENT AT OUTPUT
TERMINAL OF STOVE HIGH LIMIT
THERMOSTAT
NO
24 VOLTS PRESENT AT INPUT
TERMINAL OF STOVE HIGH LIMIT
THERMOSTAT
NO
18
(continued on following page)
70276101
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.
W002
18. CYLINDER TURNS, BUT WILL NOT HEAT (continued)
24 VOLTS PRESENT AT OUTPUT
TERMINAL OF AIRFLOW SWITCH
YES
CHECK FOR BROKEN OR LOOSE WIRE
TO STOVE HIGH LIMIT THERMOSTAT
NO
24 VOLTS PRESENT AT INPUT
TERMINAL OF AIRFLOW SWITCH
YES
REPLACE AIRFLOW SWITCH
NO
24 VOLTS PRESENT AT OUTPUT
TERMINAL OF EXHAUST HIGH LIMIT
THERMOSTAT
YES
CHECK FOR BROKEN OR LOOSE WIRE
TO AIRFLOW SWITCH
YES
REPLACE CABINET LIMIT
THERMOSTAT
YES
CHECK FOR BROKEN OR LOOSE WIRE
TO CABINET LIMIT THERMOSTAT
NO
24 VOLTS PRESENT AT INPUT
TERMINAL OF CABINET LIMIT
THERMOSTAT
NO
24 VOLTS PRESENT ON
ORG/BRN WIRE OF FAN MOTOR
70276101
19
Section 3 Troubleshooting
Notes
20
70276101
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.
W002
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.
W068R1
WARNING
To reduce the risk of fire and electric shock if electrical supply is coming from a three phase
service:
• If there is a “High Leg” or “Stinger Leg” it should be connected to L3.
W446
19. GROUNDING INSTRUCTIONS
This drying tumbler must be grounded. In the event of
malfunction or breakdown, grounding will reduce the
risk of electric shock by providing the path of least
resistance for electric current. This tumbler must be
connected to a grounded metal, permanent wiring
system; or an equipment grounding conductor must be
run with the circuit conductors and connected to the
appropriate ground location.
WARNING
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.
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
70276101
21
Section 4 Grounding
Notes
22
70276101
Section 5
Service Procedures
WARNING
To reduce the risk of electric shock, fire, explosion, serious injury or death:
• Disconnect electric power to the tumbler before servicing.
• Close gas shut-off valve to gas tumbler before servicing.
• Close steam valve to steam tumbler before servicing.
• Never start the tumbler with any guards/panels removed.
• Whenever ground wires are removed during servicing, these ground wires must be
reconnected to ensure that the tumbler is properly grounded.
W002
20. ACCESS PANEL/INTERIOR CONTROL
BOX
Refer to Figure 1.
a. Remove four screws holding access panel to
cabinet.
b. Lift access panel off top edge of front panel and
pull panel forward.
c. Remove interior control box cover.
21. CONTROL FUSE HOLDER
Refer to Figure 2.
a. Remove screws from interior control box
cover.
b. Lift access panel off top edge of front panel and
pull panel forward. Refer to Figure 1.
c. Remove control box cover.
d. Disconnect fuse holder wires.
e. Unscrew fuse holder nut from interior control
box.
f. Pull fuse holder out of control box.
22. CONTROL FUSE
Refer to Figure 2.
a. Remove four screws from exterior control box
cover and remove cover, disconnecting control
box cover harness or load ready light wires.
b. Remove screw from left and right sides of
control mounting bracket securing control
plate. Refer to Figure 3.
c. Pivot plate forward to horizontal.
d. Grasp fuse cover and rotate left until cover
releases.
e. Replace fuse.
Access
Panel
Interior
Control Box
Exterior
Control Box
Access Panel
Attaching
Screws
Front
Panel
TMB1758S
Figure 1
70276101
23
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
23. SIGNAL BUZZER
a. Remove four screws holding access panel to
cabinet. Refer to Figure 1.
b. Lift access panel off top edge of front panel and
pull panel forward. Refer to Figure 1.
c. Remove interior control box cover. Refer to
Figure 2.
d. Locate buzzer on center wall of interior control
box and disconnect wires to signal terminals.
e. Rotate buzzer to remove from control box wall.
NOTE: Buzzer signal intensifies when turned
clockwise.
NOTE: Refer to wiring diagram when rewiring
signal.
Ignition
Control
Interior
Control Box
with Cover
Removed
Buzzer
Interior
Control
Box
Cover
Temperature
Control
Control
Fuse
TMB1759S
Figure 2
24
70276101
Section 5 Service Procedures
WARNING
To reduce the risk of electric shock, fire, explosion, serious injury or death:
• Disconnect electric power to the tumbler before servicing.
• Close gas shut-off valve to gas tumbler before servicing.
• Close steam valve to steam tumbler before servicing.
• Never start the tumbler with any guards/panels removed.
• Whenever ground wires are removed during servicing, these ground wires must be
reconnected to ensure that the tumbler is properly grounded.
W002
24. LOAD READY LIGHT
(Manual Timer Models)
Refer to Figure 3.
a. Remove four screws from top and bottom
surfaces of exterior control box cover.
b. Pull cover forward. Disconnect wires from light
terminals and remove light by depressing
locking tabs.
NOTE: Refer to wiring diagram when rewiring
light.
25. IGNITION RESET SWITCH
(European Gas Models Only)
Refer to Figure 3.
a. Remove four screws from interior control box
cover. Refer to Figure 1.
b. Disconnect wires from ignition reset switch.
c. Remove ignition reset switch.
NOTE: Refer to wiring diagram when rewiring
switch.
26. EMERGENCY STOP SWITCH
(European Gas Models Only)
Refer to Figure 3.
a. Remove four screws from interior control box
cover. Refer to Figure 1.
b. Remove emergency stop switch from contact
block.
27. PUSH-TO-START SWITCH
(Manual Timer Models)
a. Remove screws from interior control box
cover. Refer to Figure 1.
b. Remove screws from exterior control box cover
and remove cover. Refer to Figure 1.
c. Remove two screws holding switch to timer
graphic panel. Refer to Figure 3.
d. Disconnect wires from switch terminals and
remove switch.
NOTE: Refer to wiring diagram when rewiring
switch.
28. COOL DOWN AND HEAT LIGHTS
(Manual Timer Models)
a. Remove screws from interior control box
cover. Refer to Figure 1.
b. Disconnect light wire leads.
c. Remove light through exterior control box.
Refer to Figure 1.
NOTE: Refer to wiring diagram when rewiring
lights.
NOTE: Refer to wiring diagram when rewiring
emergency stop switch.
70276101
25
Section 5 Service Procedures
Relay
Mounting Screw
Relay
Control Mounting
Bracket
Heat
Timer
Cooling
Timer
Control
Plate
Temperature
Control
Board
Heat Timer
Knob
Heat
Light
Temperature
Switch
Push-toStart
Switch
Temperature
Knob
Cool Down
Timer Knob
Control Trim
Pushnut
Cool Down
Light
Exterior
Control Box
Cover
Reverse/Nonreverse
Switch
Load
Ready
Light
Emergency
Stop
Switch
Control
Trim
Emergency
Stop
Button
Ignition
Reset
Switch
TMB1782S
Figure 3
26
70276101
Section 5 Service Procedures
WARNING
To reduce the risk of electric shock, fire, explosion, serious injury or death:
• Disconnect electric power to the tumbler before servicing.
• Close gas shut-off valve to gas tumbler before servicing.
• Close steam valve to steam tumbler before servicing.
• Never start the tumbler with any guards/panels removed.
• Whenever ground wires are removed during servicing, these ground wires must be
reconnected to ensure that the tumbler is properly grounded.
W002
29. COOL DOWN AND HEAT TIMERS
(Manual Timer Models)
a. Remove screws from interior control box
cover. Refer to Figure 1.
b. Pull timer knob off timer shaft. Refer to
Figure 3.
c. Remove screws from external control box and
remove cover. Refer to Figure 1.
d. Remove wires from timer terminals.
e. Remove three screws holding timer to timer
graphic panel.
31. REVERSING/NONREVERSING SWITCH
(Manual Timer Models)
Refer to Figure 3.
a. Remove screws from interior control box
cover. Refer to Figure 1.
b. Disconnect the wires from the back of the
switch.
c. Depress tabs and pull switch out.
NOTE: Refer to wiring diagram when rewiring
switch.
30. RELAY
(Manual Timer Models)
a. Remove screws from interior control box
cover. Refer to Figure 1.
b. Disconnect wires from relay.
c. Remove two screws holding relay to interior
control box. Refer to Figure 3.
32. TEMPERATURE SWITCH
(Manual Timer Models)
a. Remove four screws holding access panel to
cabinet. Refer to Figure 1.
b. Lift access panel off top edge of front panel and
pull panel forward. Refer to Figure 1.
c. Remove control box cover. Refer to Figure 2.
d. Pull knob off switch. Refer to Figure 3.
e. Disconnect wires from switch.
f. Remove nuts holding switch to panel.
NOTE: Refer to wiring diagram when rewiring
relay.
NOTE: Refer to wiring diagram when rewiring
switch.
NOTE: Refer to wiring diagram when rewiring
timer.
70276101
27
Section 5 Service Procedures
WARNING
To reduce the risk of electric shock, fire, explosion, serious injury or death:
• Disconnect electric power to the tumbler before servicing.
• Close gas shut-off valve to gas tumbler before servicing.
• Close steam valve to steam tumbler before servicing.
• Never start the tumbler with any guards/panels removed.
• Whenever ground wires are removed during servicing, these ground wires must be
reconnected to ensure that the tumbler is properly grounded.
W002
33. TEMPERATURE CONTROL BOARD
(Manual Timer Models)
Refer to Figure 3.
a. Remove screws from interior control box cover
and remove cover, disconnecting control box
cover harness or load ready light wires.
b. Remove screw from left and right sides of
control bracket securing control plate.
c. Pivot plate forward to horizontal.
d. Disconnect two plugs from wall of interior
control box and disconnect control box cover
harness (European models only).
e. Remove four screws securing control mounting
bracket to front panel, careful to support control
plate assembly.
f. Pull entire control assembly away from unit.
g. Disconnect wires from temperature control
board.
h. Depress four locking tabs securing control
board to printed circuit board supports. Remove
control.
NOTE: Refer to wiring diagram when rewiring
temperature control.
IMPORTANT: Due to sensitivity of electronic
control, careful handling is required. As a
precautionary measure, we recommend using a
grounded wrist strap when handling control. Wrist
strap, cord and alligator clip are designed to carry
away any electrostatic charge from your body and
to direct charge to an available ground.
34. ELECTRONIC CONTROL
Refer to Figure 4.
a. Remove screws from interior control box
cover.
b. Pull cover forward. Disconnect control box
cover harness (European models only).
c. Remove screw from left and right sides of
control bracket securing control plate.
d. Pivot plate forward to horizontal.
e. Disconnect wires from control.
f. Remove four nuts securing control to control
plate.
NOTE: Refer to wiring diagram when rewiring
control.
IMPORTANT: Due to sensitivity of electronic
control, careful handling is required. As a
precautionary measure, we recommend using a
grounded wrist strap when handling control. Wrist
strap, cord and alligator clip are designed to carry
away any electrostatic charge from your body and
to direct charge to an available ground.
Handle control circuit board by the sides only. Do
not contact circuit boards with hands or metal
objects. Place control in a clean, dry area away from
work area to avoid damage. Do not attempt field
repair of the control. Attempted repair or
tampering with the control will void its warranty.
Handle control circuit board by the sides only. Do
not contact circuit boards with hands or metal
objects. Place control in a clean, dry area away from
work area to avoid damage. Do not attempt field
repair of the control. Attempted repair or
tampering with the control will void its warranty.
28
70276101
Section 5 Service Procedures
Control
Mounting
Bracket
Control
Plate
Securing
Screw
Control
Plate
Overlay
Push
Nut
Exterior
Control Box
Cover
Rivet
Electronic
Control
Expansion
Clips
Label
Control Cover
Securing
Screws
Emergency Stop
Button
Control
Trim
TMB2060P
Ignition Reset
Button
Figure 4
70276101
29
Section 5 Service Procedures
WARNING
To reduce the risk of electric shock, fire, explosion, serious injury or death:
• Disconnect electric power to the tumbler before servicing.
• Close gas shut-off valve to gas tumbler before servicing.
• Close steam valve to steam tumbler before servicing.
• Never start the tumbler with any guards/panels removed.
• Whenever ground wires are removed during servicing, these ground wires must be
reconnected to ensure that the tumbler is properly grounded.
W002
35. LOADING DOOR ASSEMBLY
Refer to Figure 5.
a. Open loading door.
b. While supporting door, remove upper or lower
hinge pin holding door to hinge lug.
c. Remove door.
NOTE: Nylon washer must be in place above lower
hinge bracket when reinstalling loading door.
36. LOADING DOOR HANDLE
Refer to Figure 5.
a. Open loading door.
b. Remove screws holding door handle to door
frame.
b. Remove two screws holding switch cover to
front panel.
c. Disconnect wires from door switch.
d. Remove switch from cover by removing two
nuts and screws.
NOTE: Switch must be flush to underside of cover
at button protrusion and flats of hex nuts must be
parallel to cover underside when reassembling.
NOTE: Refer to wiring diagram when rewiring
switch.
WARNING
To reduce the risk of serious injury or
death, loading door switch MUST be
reinstalled after service is completed.
37. LOADING DOOR SWITCH
Refer to Figure 5.
a. Open loading door.
W328
Loading
Door
Loading
Door
Door
Handle
Hinge
Nut
Door
Strike
TMB1760S
Washer
TMB1792S
Door
Switch
Figure 5
30
70276101
Section 5 Service Procedures
WARNING
To reduce the risk of electric shock, fire, explosion, serious injury or death:
• Disconnect electric power to the tumbler before servicing.
• Close gas shut-off valve to gas tumbler before servicing.
• Close steam valve to steam tumbler before servicing.
• Never start the tumbler with any guards/panels removed.
• Whenever ground wires are removed during servicing, these ground wires must be
reconnected to ensure that the tumbler is properly grounded.
W002
38. FRONT PANEL
a. Remove four screws holding access panel to
cabinet. Refer to Figure 6.
b. Lift access panel off top edge of front panel and
set aside to prevent damage. Refer to Figure 6.
c. Remove control box cover. Refer to Figure 1.
d. Remove screws from exterior control box
cover. Refer to Figure 1.
e. Remove control from mounting plate.
f. Disconnect wires/harnesses and remove
control.
g. Open loading door.
h. While supporting door, remove two screws
from hinge cam at top of door and slide door out
of the bottom hinge. Refer to Figure 5.
i. Remove door.
j. Remove screws holding door switch box to
front panel.
k. Disconnect wires and remove door switch.
WARNING
To reduce the risk of serious injury or
death, loading door switch MUST be
reinstalled after service is completed.
W328
l. Open and remove lint panel. Set aside to
prevent damage.
m. Support front panel and remove screws holding
front panel to tumbler cabinet. Refer to
Figure 6.
n. Remove front panel while carefully feeding
door switch wires through hole in cabinet.
NOTE: Refer to wiring diagram when rewiring
control and door switch.
70276101
31
Section 5 Service Procedures
Access
Panel
Door Switch
Wire Channel
Door
Latch
Front
Panel
Nut
Door
Switch
Door Switch
Cover
TMB1982P
Door Hinge Lug
Assembly
Figure 6
32
70276101
Section 5 Service Procedures
WARNING
To reduce the risk of electric shock, fire, explosion, serious injury or death:
• Disconnect electric power to the tumbler before servicing.
• Close gas shut-off valve to gas tumbler before servicing.
• Close steam valve to steam tumbler before servicing.
• Never start the tumbler with any guards/panels removed.
• Whenever ground wires are removed during servicing, these ground wires must be
reconnected to ensure that the tumbler is properly grounded.
W002
39. LOADING DOOR HINGE LUG
Refer to Figure 5.
a. Open loading door until door is perpendicular
to machine front.
b. Remove bottom hex head screw from hinge
cam at bottom of door.
c. Remove lower cam assembly by sliding
downward while disengaging setscrew from
door hinge.
d. Lift door assembly off top of door hinge lug.
e. Remove four screws from top and bottom
surfaces of exterior control box cover and
remove cover, disconnecting control box cover
harness or load ready light wire. Refer to
Figure 3.
f. Remove screw from left and right sides of
control bracket securing control plate. Refer to
Figure 3.
g. Pivot plate forward to horizontal.
h. Disconnect two plugs from wall of interior
control box and disconnect control box cover
harness (European models only).
i. Remove four screws securing control mounting
bracket to front panel, careful to support control
plate assembly.
j. Pull entire control assembly away from unit.
k. Remove four screws securing front panel to
cabinet frame. Pull front panel forward,
disconnecting door switch harness plug at
upper right corner of front panel to frame. Refer
to Figure 6.
l. Remove two screws holding switch cover to
front panel.
m. Disconnect wires from door switch.
n. Remove two large screws and nuts top and
bottom securing hinge lug to front panel.
o. Remove four small screws securing hinge lug
and door switch wire channel to rear of front
panel.
40. THERMISTOR
Refer to Figure 7.
a. Remove lint panel.
b. Locate thermistor assembly on top of lint hood.
c. Remove thermistor bracket mounting screws.
d. Disconnect wiring from thermistor terminals.
e. Unscrew thermistor from thermistor nut.
NOTE: Refer to wiring diagram when rewiring
thermistor.
Thermistor
Bracket
Mounting
Screw
Lint
Screen
Thermistor
TMB1763S
Figure 7
70276101
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
41. LINT PANEL SWITCH
Refer to Figure 8.
a. Remove lint panel.
b. Remove screws from switch cover and remove
cover.
c. Disconnect wires from switch and remove
switch by depressing locking tabs on switch.
Lint
Panel
Switch
Cover
Lint
Panel
Switch
Cover
Attaching
Screws
TMB1575P
Figure 8
34
70276101
Section 5 Service Procedures
WARNING
To reduce the risk of electric shock, fire, explosion, serious injury or death:
• Disconnect electric power to the tumbler before servicing.
• Close gas shut-off valve to gas tumbler before servicing.
• Close steam valve to steam tumbler before servicing.
• Never start the tumbler with any guards/panels removed.
• Whenever ground wires are removed during servicing, these ground wires must be
reconnected to ensure that the tumbler is properly grounded.
W002
42. GAS VALVE
a. Remove four screws holding access panel to
cabinet. Refer to Figure 6.
b. Lift access panel off top edge of front panel and
pull panel forward. Refer to Figure 6.
c. Close gas shut-off valve. Refer to Figure 9.
d. Disconnect all wires from gas valve terminals
and disconnect gas valve pipe unions.
e. Remove screws holding gas valve and bracket
to stove assembly.
f. Remove gas valve from mounting bracket.
44. IGNITION CONTROL
a. Remove four screws holding access panel to
cabinet. Refer to Figure 6.
b. Lift access panel off top edge of front panel and
pull panel forward. Refer to Figure 6.
c. Remove interior control box cover. Refer to
Figure 1.
d. Disconnect wire harness.
e. Remove high voltage lead.
f. Remove two screws attaching ignition control
unit to control housing. Refer to Figure 2.
g. Remove ignition control unit.
IMPORTANT: When reinstalling gas valve, purge
air and sediment from the gas service line before
connecting it loosely to the tumbler. Purge
remaining air until odor of gas is detected, then
tighten connection. Use pipe compound resistant to
action of Liquid Petroleum Gas (L.P.) on all pipe
threads.
45. BURNER TUBE
a. Remove four screws holding access panel to
cabinet. Refer to Figure 6.
b. Lift access panel off top edge of front panel and
pull panel forward. Refer to Figure 6.
c. Close gas shut-off valve. Refer to Figure 9.
d. Disconnect union nut attaching nipple to
spudholder and remove spudholder. Refer to
Figure 9.
e. Remove igniter (if necessary). Refer to
Paragraph 43.
f. Remove screws holding burner tubes to stove
front and remove burner tubes.
NOTE: Refer to wiring diagram when rewiring gas
valve.
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
43. IGNITER
Refer to Figure 9.
a. Remove four screws holding access panel to
cabinet. Refer to Figure 6.
b. Lift access panel off top edge of front panel and
pull panel forward. Refer to Figure 6.
c. Disconnect high voltage lead from igniter.
d. Remove two screws attaching igniter bracket to
second (from right) burner tube.
70276101
WARNING
When reinstalling spudholder, use noncorrosive leak detection fluid to check all
pipe connections for gas leaks. DO NOT
USE AN OPEN FLAME TO CHECK FOR
GAS LEAKS! Make sure that spudholder
and orifices are positioned such that gas
will be injected directly down the center of
the burner.
W269R1
35
Section 5 Service Procedures
Thermostat
Cover
Gas
Shut-off
Valve
Pipe
Union
Stove
High Limit
Thermostat
Nipple
Nipple
Gas
Valve
Pipe
Union
Igniter
Spud
Holder
TMB1593P
Figure 9
36
70276101
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
46. STOVE HIGH LIMIT THERMOSTAT
(Gas Models)
a. Remove four screws holding access panel to
cabinet. Refer to Figure 6.
b. Lift access panel off top edge of front panel and
pull panel forward. Refer to Figure 6.
c. Remove screws holding thermostat cover to
stove.
d. Remove thermostat cover. Refer to Figure 9.
e. Disconnect wires to thermostat.
f. Remove the two thermostat attaching screws.
Refer to Figure 9.
g. Remove thermostat.
47. CABINET HIGH LIMIT THERMOSTAT /
LOAD READY THERMOSTAT
(Located on rear of tumbler near fan)
a. Support drive guard cover and remove screws
holding guard to rear of tumbler. Refer to
Figure 12.
b. Disconnect wires from thermostat. Refer to
Figure 10.
c. Remove two screws holding thermostat to rear
of tumbler.
CABINET
HIGH LIMIT
THERMOSTAT
WIRE
LOAD READY
THERMOSTAT
SCREW
T209SE1B
Figure 10
70276101
37
Section 5 Service Procedures
WARNING
To reduce the risk of electric shock, fire, explosion, serious injury or death:
• Disconnect electric power to the tumbler before servicing.
• Close gas shut-off valve to gas tumbler before servicing.
• Close steam valve to steam tumbler before servicing.
• Never start the tumbler with any guards/panels removed.
• Whenever ground wires are removed during servicing, these ground wires must be
reconnected to ensure that the tumbler is properly grounded.
W002
48. STEAM COILS
Refer to Figure 11.
d. Remove screws holding steam coils to coil
frame.
e. Remove screws from damper.
f. Remove steam coils by lifting straight up and
out of tumbler.
NOTE: Allow steam coils to cool before handling.
a. Shut off inlet and outlet valves and disconnect
flex hoses from steam coils
b. Remove screws holding cover to top of steam
heating unit and remove cover.
c. Remove air filters.
IMPORTANT: When removing or replacing steam
coils, be careful not to damage fins on steam coils.
Steam Heating
Unit Cover
Damper
Air
Filter
Steam
Coils
TMB1585P
Figure 11
38
70276101
Section 5 Service Procedures
WARNING
To reduce the risk of electric shock, fire, explosion, serious injury or death:
• Disconnect electric power to the tumbler before servicing.
• Close gas shut-off valve to gas tumbler before servicing.
• Close steam valve to steam tumbler before servicing.
• Never start the tumbler with any guards/panels removed.
• Whenever ground wires are removed during servicing, these ground wires must be
reconnected to ensure that the tumbler is properly grounded.
W002
49. DRIVE GUARD COVER / CORNER DRIVE
GUARD
Refer to Figure 12.
a. Support corner drive guard and remove screws
holding corner guard to rear of tumbler.
b. Support drive guard cover and remove screws
holding guard to rear of tumbler.
Drive Guard
Top
Drive Guard
Attaching
Screws
Drive Guard
Side
Drive Guard
Cover
Drive Guard
Side
TMB1848S
Figure 12
70276101
39
Section 5 Service Procedures
WARNING
To reduce the risk of electric shock, fire, explosion, serious injury or death:
• Disconnect electric power to the tumbler before servicing.
• Close gas shut-off valve to gas tumbler before servicing.
• Close steam valve to steam tumbler before servicing.
• Never start the tumbler with any guards/panels removed.
• Whenever ground wires are removed during servicing, these ground wires must be
reconnected to ensure that the tumbler is properly grounded.
W002
50. AIRFLOW SWITCH
(Located at rear of tumbler above cylinder shaft)
a. Support corner drive guard and remove screws
holding corner drive to rear of tumbler. Refer to
Figure 12.
b. Support drive guard cover and remove screws
holding guard to rear of tumbler. Refer to
Figure 12.
c. Disconnect wires from switch. Refer to
Figure 13.
NOTE: Refer to wiring diagram when rewiring
airflow switch.
d. Remove screw(s) holding switch and mounting
bracket to tumbler. Refer to Figure 13.
e. Remove two screws holding switch to
mounting bracket.
NOTE: After reinstalling airflow switch and
mounting bracket into switch box, adjust switch.
Airflow
Switch
Screws
Mounting
Bracket
Switch
Nut
Cotter
Pin
Vane
TMB2061P
Figure 13
40
70276101
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
51. CYLINDER BELTS
Refer to Figure 15.
a. Support corner drive guard and remove screws
holding corner guard to rear of tumbler.
b. Support drive guard cover and remove screws
holding guard to rear of tumbler.
c. Loosen the four jackshaft assembly attaching
screws.
d. Rotate the adjusting nuts counterclockwise
(approximately three turns). Refer to Figure 14.
e. Slide jackshaft assembly upwards to loosen the
cylinder belts.
f. Remove cylinder belts.
NOTE: After reinstalling belt, adjust drive belts
and cylinder belt. Install new belts as a set of 3.
ATTACHING
SCREWS
ADJUSTING
NUTS
d. Rotate the adjusting nuts counterclockwise
(approximately three turns).
e. Slide jackshaft assembly upwards to loosen the
cylinder belts.
f. Remove cylinder belts.
g. Remove drive belt.
NOTE: After reinstalling drive belt, adjust cylinder
belts then drive belt.
53. STEP PULLEY ASSEMBLY
Refer to Figure 15.
a. Support corner drive guard and remove screws
holding corner guard to rear of tumbler.
b. Support drive guard cover and remove screws
holding guard to rear of tumbler.
c. Loosen the four jackshaft assembly attaching
screws.
d. Rotate the adjusting nuts counterclockwise
(approximately three turns).
e. Slide jackshaft assembly upwards to loosen the
cylinder belts.
f. Remove cylinder belt.
g. Remove drive belts.
h. Remove snap ring and pull step pulley off of
jackshaft.
Refer to Table 1 on page 42 for critical torques.
JACKSHAFT
ASSEMBLY
T212SE1A
Figure 14
52. DRIVE BELT
Refer to Figure 15.
a. Support corner drive guard and remove screws
holding corner guard to rear of tumbler.
b. Support drive guard cover and remove screws
holding guard to rear of tumbler.
c. Loosen the four jackshaft assembly attaching
screws.
70276101
NOTE: Belt tension from step pulley to cylinder
shaft pulley can be measured to ensure proper
installation in one of the following ways:
• Burroughs Belt Tension Gauge initial reading
70-80 pounds.
• Force to deflect belt .38 inch at midspan with
initial tensioning 6.5 pounds
• Burroughs Belt Tension Gauge reading after run
55-65 pounds.
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
Critical Torques
Location
(With nut threading)
Measurement in
Inch Pounds
Measurement in
Foot Pounds
Front cylinder shaft bearing to frame nut (1/2 – 13)
600 ± 60
50 ± 5
Rear cylinder shaft bearing to bearing plate nut (1/2 – 13)
600 ± 60
50 ± 5
Cylinder drive motor pulley bushing cap screw to cylinder
drive motor pulley (10-24)
46 ± 5
Cylinder drive motor pulley bushing set screw to cylinder
drive motor shaft (10-24)
28 ± 3
Cylinder shaft pulley (25.00 O.D.) QD bushing cap screw to
cylinder pulley (3/8-16)
400 ± 40
Cylinder shaft pulley (25.00 O.D.) QD bushing set screw to
cylinder shaft (1/4-20)
68 ± 7
Fan bushing cap screw to fan (10-24)
46 ± 5
Fan bushing set screw to fan (10-24)
28 ± 3
Fan motor pulley bushing cap screw to fan motor pulley
(10-24)
46 ± 5
Fan motor pulley bushing set screw to fan motor shaft
(1/4-20)
68 ± 7
Fan pulley bushing cap screw to fan shaft (1/4-20)
110 ± 11
Fan pulley bushing set screw to fan shaft (1/4-20)
68 ± 7
33 ± 3
Table 1
42
70276101
Section 5 Service Procedures
WARNING
To reduce the risk of electric shock, fire, explosion, serious injury or death:
• Disconnect electric power to the tumbler before servicing.
• Close gas shut-off valve to gas tumbler before servicing.
• Close steam valve to steam tumbler before servicing.
• Never start the tumbler with any guards/panels removed.
• Whenever ground wires are removed during servicing, these ground wires must be
reconnected to ensure that the tumbler is properly grounded.
W002
54. CYLINDER SHEAVE
Refer to Figure 15.
a. Support corner drive guard and remove screws
holding corner guard to rear of tumbler.
b. Support drive guard cover and remove screws
holding guard to rear of tumbler.
c. Loosen the four jackshaft assembly attaching
screws.
d. Rotate the adjusting nuts counterclockwise
(approximately three turns).
e. Slide jackshaft assembly upwards to loosen the
cylinder belts.
f. Remove cylinder belts.
g. Loosen bushing setscrew.
h. Remove screws from tapered bushing.
i. Remove tapered bushing by putting the screws
removed in step “h” into the threaded holes in
the bushing. Turning the screws inward will
force the bushing out of the cylinder sheave.
j. Remove cylinder sheave.
Cylinder
Belt
Cylinder
Sheave
Drive
Belt
Setscrew
Bolt
Nut
Tapered
Bushing
Jackshaft
Assembly
TMB1784S
Snap
Ring
Step
Pulley
Figure 15
70276101
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
55. MOTOR PULLEY
a. Remove drive belt.
b. Loosen setscrews and, remove screws from
tapered bushing. Refer to Figure 16.
c. Remove tapered bushing by putting the screws
removed in step “b” into the threaded holes in
the bushing. Turning the screws inward will
force the bushing out of the motor pulley.
d. Remove motor pulley.
SETSCREW
Refer to Table 1 on page 42 for critical torques.
NOTE: Belt tension from cylinder drive motor
pulley to step pulley can be measured to ensure
proper installation in one of the following ways:
• Burroughs Belt Tension Gauge initial reading
60-70 pounds.
• Force to deflect belt .38 inch at midspan with
initial tensioning 6.0 pounds
• Burroughs Belt Tension Gauge reading after run
45-55 pounds.
IMPORTANT: Realign cylinder motor pulley with
step pulley by loosening the tapered bushing and
repositioning the motor pulley on the cylinder
motor shaft. Refer to Figure 16.
56. JACKSHAFT ASSEMBLY
Refer to Figure 15.
a. Remove step pulley. Refer to Paragraph 53.
b. Remove four bolts attaching jackshaft to the
rear of tumbler.
NOTE: After installing step pulley, adjust belts.
57. CYLINDER ASSEMBLY
a. Remove front panel assembly.
b. Support drive guard cover and remove screws
holding guard to rear of tumbler. Refer to
Figure 12.
c. Loosen the four jackshaft assembly attaching
nuts. Refer to Figure 15.
d. Rotate the adjusting nuts counterclockwise
(approximately three turns).
44
SCREWS
TAPERED
BUSHING
MOTOR
PULLEY
T371PE1A
Figure 16
e. Slide jackshaft assembly upwards to loosen the
cylinder belts.
f. Remove cylinder belts.
g. Remove drive belt. Refer to Figure 15.
h. Remove screws from tapered bushing. Refer to
Figure 16.
i. Remove tapered bushing by putting the screws
removed in step “h” into the threaded holes in
the bushing. Turning the screws inward will
force the bushing out of the cylinder sheave.
j. Remove cylinder sheave.
k. Loosen setscrews on trunnion bearings. Refer
to Figure 17.
l. Pull cylinder through front of cabinet.
NOTE: After reinstalling drive and cylinder belts,
adjust belts.
NOTE: Do not allow cylinder to rest on cabinet
frame. Support cylinder vertically as it is removed
from cabinet frame.
70276101
Section 5 Service Procedures
WARNING
To reduce the risk of electric shock, fire, explosion, serious injury or death:
• Disconnect electric power to the tumbler before servicing.
• Close gas shut-off valve to gas tumbler before servicing.
• Close steam valve to steam tumbler before servicing.
• Never start the tumbler with any guards/panels removed.
• Whenever ground wires are removed during servicing, these ground wires must be
reconnected to ensure that the tumbler is properly grounded.
W002
58. TRUNNION BEARINGS
Refer to Figure 17.
a. Remove front panel assembly.
b. Place blocks under cylinder that will hold it
level while trunnion bearings are being
serviced.
c. Remove cylinder sheave.
d. Loosen the front and rear adjusting screws.
e. Loosen setscrews holding bearings to shaft.
f. Remove bearing mounting screws.
g. Remove rear bearing.
h. Remove screws holding mounting bracket to
tumbler.
i. Remove mounting bracket.
j. Remove front bearing mounting nuts.
k. Loosen setscrews holding bearing to shaft.
l. Remove front bearing.
Front Bearing
Setscrews
Rear
Adjusting
Screw
Bearing
Mounting
Screw
Mounting
Bracket
Rear
Bearing
Setscrews
Front
Bearing
Assembly
Rear
Bearing
Assembly
Mounting Bracket
Attaching
Screw
Front
Adjusting
Screw
Shim
TMB1984P
Figure 17
70276101
45
Section 5 Service Procedures
WARNING
To reduce the risk of electric shock, fire, explosion, serious injury or death:
• Disconnect electric power to the tumbler before servicing.
• Close gas shut-off valve to gas tumbler before servicing.
• Close steam valve to steam tumbler before servicing.
• Never start the tumbler with any guards/panels removed.
• Whenever ground wires are removed during servicing, these ground wires must be
reconnected to ensure that the tumbler is properly grounded.
W002
59. FAN BELT
a. Support corner drive guard and remove screws
holding corner guard to rear of tumbler. Refer
to Figure 12.
b. Support drive guard cover and remove screws
holding guard to rear of tumbler. Refer to
Figure 12.
c. Loosen fan belt with adjusting nuts. Refer to
Figure 18.
d. Remove fan belt.
NOTE: After reinstalling fan belt, adjust belt
tension.
60. FAN MOTOR PULLEY
a. Support corner drive guard and remove screws
holding corner guard to rear of tumbler. Refer
to Figure 12.
b. Support drive guard cover and remove screws
holding guard to rear of tumbler. Refer to
Figure 12.
c. Loosen fan belt with adjusting nuts. Refer to
Figure 18.
d. Remove fan belt.
e. Loosen setscrews and remove screws from
tapered bushing.
f. Remove tapered bushing by putting the screws
removed in step “e” into the threaded holes in
the bushing. Turning the screws inward will
force the bushing out of the motor pulley.
g. Remove fan motor pulley.
NOTE: Belt tension from fan motor pulley to fan
shaft pulley can be measured to ensure proper
installation in one of the following ways:
• Burroughs Belt Tension Gauge initial reading
75-80 pounds.
• Force to deflect belt .38 inch at midspan with
initial tensioning 5.0 pounds
• Burroughs Belt Tension Gauge reading after run
60-65 pounds.
61. FAN PULLEY
Refer to Figure 18.
a. Support corner drive guard and remove screws
holding corner guard to rear of tumbler. Refer
to Figure 12.
b. Support drive guard cover and remove screws
holding guard to rear of tumbler. Refer to
Figure 12.
c. Loosen fan belt with adjusting nuts.
d. Remove fan belt.
e. Loosen setscrew and remove screws from
tapered bushing.
f. Remove tapered bushing by putting the screws
removed in step “e” into the threaded holes in
the tapered bushing. Turning the screws inward
will force the bushing off of the tapered
bushing.
g. Remove tapered bushing and fan pulley from
blower shaft.
Refer to Table 1 on page 42 for critical torques.
Refer to Table 1 on page 42 for critical torques.
46
70276101
Section 5 Service Procedures
WARNING
To reduce the risk of electric shock, fire, explosion, serious injury or death:
• Disconnect electric power to the tumbler before servicing.
• Close gas shut-off valve to gas tumbler before servicing.
• Close steam valve to steam tumbler before servicing.
• Never start the tumbler with any guards/panels removed.
• Whenever ground wires are removed during servicing, these ground wires must be
reconnected to ensure that the tumbler is properly grounded.
W002
62. FAN MOTOR
Refer to Figure 18.
a. Support corner drive guard and remove screws
holding corner guard to rear of tumbler. Refer
to Figure 12.
b. Support drive guard cover and remove screws
holding guard to rear of tumbler. Refer to
Figure 12.
c. Loosen fan belt with adjusting nuts.
d. Remove fan belt.
e. Remove fan motor pulley.
f. Remove screws holding fan motor to motor
base.
g. Disconnect wires from motor.
h. Remove fan motor.
Refer to Table 1 on page 42 for critical torques.
NOTE: Refer to wiring diagram when rewiring
motor.
63. FAN ASSEMBLY
Refer to Figure 18.
a. Support corner drive guard and remove screws
holding corner guard to rear of tumbler. Refer
to Figure 12.
b. Support drive guard cover and remove screws
holding guard to rear of tumbler. Refer to
Figure 12.
c. Loosen fan belt with adjusting nuts.
d. Remove fan belt.
e. Remove fan pulley.
f. Remove step pulley assembly.
g. Remove nuts holding blower cover to rear of
tumbler.
h. Remove blower cover and fan assembly from
tumbler.
i. Remove screws holding tapered bushing to fan.
j. Remove tapered bushing by putting the screws
removed in previous step into the threaded
holes in the bushing. Turning the screws inward
will force the bushing off the fan.
k. Remove fan from blower shaft.
NOTE: If replacing a worn bushing with a new one,
do not use the screws that come with a newly
ordered bushing. Reuse the longer old bushing
screws or order the screws shown in the parts
manual.
70276101
47
Section 5 Service Procedures
FAN
MOTOR
FAN
MOTOR
PULLEY
FAN
MOTOR
BASE
BUSHING
ADJUSTING
NUTS
BLOWER
COVER
BUSHING
FAN
T152K
BLOWER
SHAFT
FAN
PULLEY
Figure 18
48
70276101
Section 5 Service Procedures
WARNING
To reduce the risk of electric shock, fire, explosion, serious injury or death:
• Disconnect electric power to the tumbler before servicing.
• Close gas shut-off valve to gas tumbler before servicing.
• Close steam valve to steam tumbler before servicing.
• Never start the tumbler with any guards/panels removed.
• Whenever ground wires are removed during servicing, these ground wires must be
reconnected to ensure that the tumbler is properly grounded.
W002
64. TRUNNION SHAFT ASSEMBLY
a. Remove front panel assembly.
b. Remove cylinder belts and drive belt.
c. Remove cylinder sheave.
d. Loosen setscrews on trunnion bearings. Refer
to Figure 17.
e. Pull cylinder through front of cabinet.
NOTE: When removing cylinder out through front
of cabinet, spread cabinet slightly so cylinder will
clear cabinet sides.
NOTE: Do not allow cylinder to rest on cabinet
frame. Support cylinder vertically as it is removed
from cabinet frame.
f. Remove the eight washers and nuts holding
trunnion shaft assembly to rear of cylinder.
Refer to Figure 19.
IMPORTANT: When installing trunnion assembly
on cylinder, the cylinder and shaft must be aligned.
Refer to Figure 19. Measure the distance between
the center of the trunnion shaft and the outer rim of
the cylinder at the four points shown. If any
measurement is less than the largest, place spacer(s)
between trunnion arm and cylinder back until all
measurements are equal.
Trunnion
Shaft
MEASURE AT
FOUR POINTS
Tape
Measure
Trunnion
Arm
Cylinder
TMB1785S
Figure 19
49
70276101
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
65. CYLINDER DRIVE MOTOR
a. Support corner drive guard and remove screws
holding corner guard to rear of tumbler. Refer
to Figure 12.
b. Support drive guard cover and remove screws
holding guard to rear of tumbler. Refer to
Figure 12.
c. Remove drive belt.
d. Mark location of motor on the motor mounting
bracket and remove screws and nuts holding
motor to mounting bracket. Refer to Figure 20.
e. Disconnect wire harness from motor.
f. Remove motor pulley.
g. After installing motor, adjust cylinder belt then
drive belt.
Refer to Table 1 on page 42 for critical torques.
NOTE: Refer to wiring diagram when rewiring the
motor.
Motor
Attaching
Screw
Motor
Pulley
Motor
Mounting
Bracket
Attaching
Nut
TMB1986P
Figure 20
50
70276101
Section 5 Service Procedures
Contactor Box
Fuseholder
Fuse
Terminal
Block
Terminal
Strip
L1
L2
L3
Reversing
Timer
SEC
UR
E
GR WIRGRO
OU E T UN
ND O D
SC
RE
W
Transformer
Reversing
Contactor
TMB1762S
Fan Motor
Contactor
Figure 21
70276101
51
Section 5 Service Procedures
WARNING
To reduce the risk of electric shock, fire, explosion, serious injury or death:
• Disconnect electric power to the tumbler before servicing.
• Close gas shut-off valve to gas tumbler before servicing.
• Close steam valve to steam tumbler before servicing.
• Never start the tumbler with any guards/panels removed.
• Whenever ground wires are removed during servicing, these ground wires must be
reconnected to ensure that the tumbler is properly grounded.
W002
66. REVERSING TIMER
(Manual Timer Models Only)
Refer to Figure 21.
a. Remove two attaching screws and cover from
contactor box.
b. Disconnect wires from reversing timer.
NOTE: Refer to wiring diagram when rewiring
timer motor and switches.
c. Remove two screws holding reversing timer to
back wall of contactor box.
d. Remove reversing timer.
67. REVERSING CONTACTOR
Refer to Figure 21.
a. Remove two attaching screws and cover from
contactor box.
b. Disconnect wires from contactor terminals.
NOTE: Refer to wiring diagram when rewiring
reversing contactor.
c. Remove screws holding reversing contactor to
back wall of contactor box.
d. Remove reversing contactor.
68. FAN MOTOR CONTACTOR
Refer to Figure 21.
a. Remove two attaching screws and cover from
contactor box.
b. Disconnect wires from contactor terminals.
NOTE: Refer to wiring diagram when rewiring fan
motor contactor.
c. 50 Hertz models: Remove two screws holding
din rail to back wall of contactor box, then slide
contactor off din rail.
60 Hertz models: Remove screws holding
contactor to contactor box.
69. TRANSFORMER
Refer to Figure 21.
a. Remove two attaching screws and cover from
contactor box.
b. Disconnect leads from transformer terminals.
NOTE: Refer to wiring diagram when rewiring
transformer.
52
c. Remove four screws holding transformer to
contactor box.
d. Remove transformer.
70. EXHAUST SYSTEM COMPONENTS
Refer to Figure 22.
a. Support corner drive guard and remove screws
holding corner drive to rear of tumbler.
b. Support drive guard cover and remove screws
holding guard to rear of tumbler.
c. Remove vent pipe.
d. Remove attaching screws and thimble
assembly from duct box wrap.
e. Remove attaching screws, duct box wrap, and
damper assembly from tumbler.
VENT
PIPE
THIMBLE
ASSEMBLY
DUCT BOX
WRAP
DAMPER
ASSEMBLY
T211SE1A
Figure 22
70276101
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
71. LEVELING
NOTE: It is recommended that the front of the
tumbler be kept slightly higher than the rear
(approximately 1/8 inch, 3.0 mm). This will prevent
the clothes, while tumbling, from wearing on the
door glass gasket.
a. Check the front to rear level by rotating the
clothes cylinder until one of the cylinder ribs is
at the bottom. Place a level on the rib.
b. Check the side to side level by placing a level
on access panel top and rear frame top angle.
70276101
53
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
72. MAIN GAS BURNER AIR INLET
SHUTTERS
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 primary air supplied to the burner
while closing the shutter decreases the air supply.
Adjust air shutter as follows:
a. Remove the access panel.
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 left of the heater
section. Refer to Figure 23. Too little air is
indicated if the flame is yellow, lazy and
smokey.
c. To adjust the air inlet shutter, loosen adjusting
screw.
d. Slide shutter in or out as necessary to obtain
desired flame intensity.
e. After shutter is adjusted, tighten adjusting
screw securely.
f. If the flame pattern is straight up, insufficient
air is flowing through the tumbler. Refer to
Figure 23. A flame pattern that flares to the
right and left indicates that no air is flowing
through the tumbler.
INSUFFICIENT AIRFLOW
Air Shutter
Adjusting Screw
T197SE3C
PROPER AIRFLOW
Air Shutter
Adjusting Screw
T196SE3C
NO AIRFLOW
Air Shutter
Adjusting Screw
T195SE3C
Figure 23
54
70276101
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
73. AIRFLOW SWITCH
The airflow switch is set at the factory for proper
operation. No adjustment necessary. Refer to
Figure 24.
IMPORTANT: Airflow switch vane must remain
closed during operation. If it opens and closes
during the drying cycle, this indicates insufficient
airflow through the tumbler. If switch remains
open, or pops open and closed during the cycle, the
heating system will shut off. The cylinder and fan
will continue to operate even though the airflow
switch is indicating insufficient airflow.
74. LOADING DOOR STRIKE
Refer to Figure 25.
The door strike must be adjusted so it has
sufficient tension to hold loading door closed
against the force of a tumbling load. The door
strike is properly adjusted when 8-15 lbs. (17.6-33
kg) of pull is required to open door.
To adjust, open door, loosen nut and turn door
strike screw in or out as required. Retighten nut.
AIRFLOW
SWITCH
Door
Strike
Door
Latch
T048I
T283i
Figure 24
70276101
Figure 25
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
Motor
Bracket
Pivot Screw
Side
Bracket
Motor
Mounting
Bracket
Adjusting
Nuts
Adjusting
Tube
TMB1986P
Figure 26
75. CYLINDER BELT TENSION
NOTE: Belt tension from cylinder drive motor
pulley to step pulley can be measured to ensure
proper installation in one of the following ways:
• Burroughs Belt Tension Gauge initial reading
60-70 pounds.
• Force to deflect belt .38 inch at midspan with
initial tensioning 6.0 pounds
56
• Burroughs Belt Tension Gauge reading after run
45-55 pounds.
a. Support corner drive guard and remove screws
holding corner guard to rear of tumbler.
b. Support drive guard cover and remove screws
holding guard to rear of tumbler.
c. Loosen the four jackshaft assembly attaching
screws. Refer to Figure 27.
70276101
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
d. Loosen adjusting nuts on outer eyebolt and
rotate bottom nut clockwise until proper
tension is reached. Refer to Figure 26.
e. Retighten all nuts and screws.
f. Readjust drive belt.
IMPORTANT: Adjusting the cylinder belt tension
WILL AFFECT the drive belt tension. You MUST
check and readjust the drive belt tension after
adjusting the cylinder belt tension.
JACKSHAFT
ASSEMBLY
ATTACHING
SCREWS
76. DRIVE BELT TENSION
Refer to Figure 26.
NOTE: If cylinder belts will be adjusted, service
them before drive belt.
NOTE: Belt tension from step pulley to cylinder
shaft pulley can be measured to ensure proper
installation in one of the following ways:
• Burroughs Belt Tension Gauge initial reading
70-80 pounds.
• Force to deflect belt .38 inch at midspan with
initial tensioning 6.5 pounds.
• Burroughs Belt Tension Gauge reading after run
55-65 pounds.
a. Support corner drive guard and remove screws
holding corner guard to rear of tumbler.
b. Support drive guard cover and remove screws
holding guard to rear of tumbler.
c. Reinstall drive guard.
d. Loosen the two side bracket attaching screws.
e. Turn the adjusting nuts clockwise until proper
tension is reached.
f. Tighten all nuts and screws.
JACKSHAFT
ASSEMBLY
T317PE1B
Figure 27
70276101
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
77. FAN BELT TENSION
Refer to Figure 28.
NOTE: Belt tension from fan motor pulley to fan
shaft pulley can be measured to ensure proper
installation in one of the following ways:
• Burroughs Belt Tension Gauge initial reading 7580 pounds.
• Force to deflect belt .38 inch at midspan with
initial tensioning 5.0 pounds
• Burroughs Belt Tension Gauge reading after run
60-65 pounds.
a. Support corner drive guard and remove screws
holding corner guard to rear of tumbler.
b. Support drive guard cover and remove screws
holding guard to rear of tumbler.
c. Loosen the two mounting bracket attaching
screws.
d. Raise or lower eye bolt until proper tension is
reached.
e. Retighten all nuts and screws.
FAN
BELT
FAN
MOTOR
PULLEY
EYE
BOLT
FAN
PULLEY
MOUNTING
BRACKET ATTACHING
SCREWS
T213SE1A
Figure 28
58
70276101
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
78. CYLINDER CLEARANCE
The clearance between the cylinder rim and front
panel must be adjusted so the cylinder is centered
within the front panel opening when the cylinder
is fully loaded and is turning. However, the
adjustment should be made when the cylinder is
empty.
NOTE: If the cylinder is not properly adjusted, the
cylinder rim will rub against the front panel.
a. Open loading door.
b. Check the gap between the center of the front
panel top flange and the cylinder rim. Proper
adjustment is when the gap is 8/32 inch ± 3/32
inch. Refer to Figure 29. Perform steps “a”
through “g” to adjust the cylinder rim/front
panel flange clearance.
c. Check the cylinder fore/aft clearance between
the inside front of the cylinder and the edge of
the front panel flange. Proper adjustment is
when the gap is 9/32 inch ± 1/32 inch. Refer to
Figure 29. Perform steps “h” through “m” to
adjust the cylinder fore/aft clearance.
CYLINDER RIM/FRONT PANEL FLANGE
CLEARANCE ADJUSTMENT
a. Support corner drive guard and remove screws
holding corner guard to rear of tumbler.
b. Support drive guard cover and remove screws
holding guard to rear of tumbler.
c. Loosen rear bearing mounting screws. Refer to
Figure 30.
d. Loosen the locknuts on rear adjustment screws.
Refer to Figure 30.
e. Turn the adjusting screws in or out as necessary
to obtain proper clearance between cylinder rim
and front panel.
f. After the cylinder is properly adjusted, tighten
the adjusting screw locknuts and the rear
bearing mounting screws.
g. Install drive guard cover. Refer to Paragraph
49.
NOTE: If adjusting the trunnion housing fails to
correct the clearance, the problem is probably due
to a worn trunnion shaft or defective bearings.
CYLINDER FORE/AFT CLEARANCE
ADJUSTMENT
h. Support corner drive guard and remove screws
holding corner guard to rear of tumbler.
i. Support drive guard cover and remove screws
holding guard to rear of tumbler.
j. Loosen setscrews in the front bearing assembly
collar and rear bearing assembly collar. Refer to
Figure 30.
k. Move cylinder assembly in or out as necessary
to obtain proper clearance between the cylinder
and the front panel.
l. After the cylinder is properly adjusted, tighten
setscrews in the front and rear bearing assembly
collars.
m. Install drive guard cover. Refer to Paragraph
49.
NOTE: Turning the adjusting screws clockwise will
raise the cylinder and turning them counterclockwise will lower the cylinder. Turn both screws
evenly to adjust top and bottom clearance. Turn one
or the other adjusting screw in or out to adjust side
clearance.
70276101
59
Section 6 Adjustments
Inside Front
of Cylinder
Cylinder
Rim
8/32 in. ± 3/32 in.
9/32 in. ± 1/32 in.
Front Panel
Flange
(Top Shown)
Fore / Aft
Clearance
Cylinder Rim /
Front Panel Flange
Clearance
TMB1786S
Figure 29
REAR
ADJUSTING
SCREW
ADJUSTING
SCREW
LOCKNUT
REAR
BEARING MOUNTING
SCREW
TMB1500S
FRONT
BEARING ASSEMBLY
COLLAR
REAR
BEARING ASSEMBLY
COLLAR
FRONT
ADJUSTING
SCREW
Figure 30
60
70276101
Section 7
Wiring Schematics
WARNING
Failure to install, maintain, and/or operate this machine according to the manufacturer's
instructions may result in conditions which can produce bodily injury and/or property damage.
W030
WIRING DIAGRAMS AND SCHEMATICS
FOUND ON THE FOLLOWING PAGES
ARE FOR MODELS COVERED IN THIS MANUAL.
70276101
61
Section 7 Wiring Schematics
WARNING
Failure to install, maintain, and/or operate this machine according to the manufacturer's
instructions may result in conditions which can produce bodily injury and/or property damage.
W030
MANUAL TIMER MODELS
208-230 VAC, 60 HERTZ, 3 PHASE GAS
62
70276101
Section 7 Wiring Schematics
WARNING
Failure to install, maintain, and/or operate this machine according to the manufacturer's
instructions may result in conditions which can produce bodily injury and/or property damage.
W030
MANUAL TIMER MODELS
380-415 VAC, 50 HERTZ, 3 PHASE GAS
70276101
63
Section 7 Wiring Schematics
WARNING
Failure to install, maintain, and/or operate this machine according to the manufacturer's
instructions may result in conditions which can produce bodily injury and/or property damage.
W030
MANUAL TIMER MODELS
460 VAC, 60 HERTZ, 3 PHASE GAS
64
70276101
Section 7 Wiring Schematics
WARNING
Failure to install, maintain, and/or operate this machine according to the manufacturer's
instructions may result in conditions which can produce bodily injury and/or property damage.
W030
MANUAL TIMER MODELS
208-240 VAC, 60 HERTZ, 3 PHASE STEAM
70276101
65
Section 7 Wiring Schematics
WARNING
Failure to install, maintain, and/or operate this machine according to the manufacturer's
instructions may result in conditions which can produce bodily injury and/or property damage.
W030
MANUAL TIMER MODELS
380-415 VAC, 50 HERTZ, 3 PHASE STEAM
66
70276101
Section 7 Wiring Schematics
WARNING
Failure to install, maintain, and/or operate this machine according to the manufacturer's
instructions may result in conditions which can produce bodily injury and/or property damage.
W030
MANUAL TIMER MODELS
460 VAC, 60 HERTZ, 3 PHASE STEAM
70276101
67
Section 7 Wiring Schematics
WARNING
Failure to install, maintain, and/or operate this machine according to the manufacturer's
instructions may result in conditions which can produce bodily injury and/or property damage.
W030
AT,HT, PT, ST, UT, WT AND XT MICRO CONTROL RM MODELS
208-230 VAC, 60 HERTZ, 3 PHASE GAS
68
70276101
Section 7 Wiring Schematics
WARNING
Failure to install, maintain, and/or operate this machine according to the manufacturer's
instructions may result in conditions which can produce bodily injury and/or property damage.
W030
AT, HT, PT, ST, UT, WT AND XT MICRO CONTROL RM MODELS
380-415 VAC, 50 HERTZ, 3 PHASE GAS
70276101
69
Section 7 Wiring Schematics
WARNING
Failure to install, maintain, and/or operate this machine according to the manufacturer's
instructions may result in conditions which can produce bodily injury and/or property damage.
W030
HA, PA, SA AND UA MICRO CONTROL RM MODELS
380-415 VAC, 50 HERTZ, 3 PHASE GAS
70
70276101
Section 7 Wiring Schematics
WARNING
Failure to install, maintain, and/or operate this machine according to the manufacturer's
instructions may result in conditions which can produce bodily injury and/or property damage.
W030
AT, HT, PT, ST, UT, WT AND XT MICRO CONTROL RM MODELS
460-480 VAC, 60 HERTZ, 3 PHASE GAS
70276101
71
Section 7 Wiring Schematics
WARNING
Failure to install, maintain, and/or operate this machine according to the manufacturer's
instructions may result in conditions which can produce bodily injury and/or property damage.
W030
AT, HT, PT, ST, UT, WT AND XT MICRO CONTROL RM MODELS
208-230 VAC, 60 HERTZ, 3 PHASE STEAM
72
70276101
Section 7 Wiring Schematics
WARNING
Failure to install, maintain, and/or operate this machine according to the manufacturer's
instructions may result in conditions which can produce bodily injury and/or property damage.
W030
AT, HT, PT, ST, UT, WT AND XT MICRO CONTROL RM MODELS
380-415 VAC, 50 HERTZ, 3 PHASE STEAM
70276101
73
Section 7 Wiring Schematics
WARNING
Failure to install, maintain, and/or operate this machine according to the manufacturer's
instructions may result in conditions which can produce bodily injury and/or property damage.
W030
HU, PU, SU, UU AND XU MICRO CONTROL RM MODELS
380-415 VAC, 50 HERTZ, 3 PHASE STEAM
74
70276101
Section 7 Wiring Schematics
WARNING
Failure to install, maintain, and/or operate this machine according to the manufacturer's
instructions may result in conditions which can produce bodily injury and/or property damage.
W030
AT, HT, PT, ST, UT, WT AND XT MICRO CONTROL RM MODELS
460-480 VAC, 60 HERTZ, 3 PHASE STEAM
70276101
75
Section 7 Wiring Schematics
Notes
76
70276101
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