ALLIANCE AT050L Service Manual Download

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www.comlaundry.com

Part No. 70269301

January 2003

TMB795C

Ser

ice

Drying Tumblers

50 Pound Capacity

Refer to Page 5 for Model Numbers

Summary of Contents for AT050L

Page 1: ...www comlaundry com Part No 70269301 January 2003 TMB795C Service Drying Tumblers 50 Pound Capacity Refer to Page 5 for Model Numbers ...

Page 2: ...art Time on Drying Timer Door Closed 18 18 Motor Runs Time on Drying Timer But No Heat 19 19 No Main Burner Flame Igniter Does Not Spark 20 20 Steam OM Models No Heat with cycle selected unit running and calling for heat 21 21 OM and RM Models No Start with cycle selected start button pressed and door closed 22 22 OM Models No Display after selecting one of the ON SELECT keys 23 23 Electric OM Mod...

Page 3: ...ion Housing Assembly 48 57 Trunnion Shaft Assembly 49 58 Motor and Fan Assembly 50 59 Fan And Motor Assembly 52 60 Cylinder Drive Motor 53 Section 6 Adjustments 61 Leveling Legs 55 62 Main Gas Burner Air Inlet Shutters 56 63 Airflow Switch 57 64 Loading Door Strike 59 65 Drive Belt Tension 59 66 Cylinder Clearance 62 ...

Page 4: ... indicates the presence of a hazard that will cause severe personal injury death or substantial property damage if the danger is ignored DANGER WARNING indicates the presence of a hazard that can cause severe personal injury death or substantial property damage if the warning is ignored WARNING CAUTION indicates the presence of a hazard that will or can cause minor personal injury or property dama...

Page 5: ...esulting 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 To reduce the risk of electric shock fire explosion serio...

Page 6: ...0L UU050N AT050S GU050S HT050S HU050S PT050S PU050S ST050S SU050S UT050S UU050S GT050E GU050E HT050E HU050E LU050E PT050E PU050E ST050E SU050E UT050E UU050E BC basic electronic coin MT manual timer RM reversing OPL micro BL basic electronic central pay NC NetMaster coin RT reversing manual timer BX basic electronic prep for coin NR NetMaster card ZC NetMaster coin network ready BY basic electronic...

Page 7: ...ance Laundry Systems at 920 748 3950 for the name and address of the nearest authorized parts distributor For technical assistance call 920 748 3121 Serial Plate Location When calling or writing about your product be sure to mention model and serial numbers Model and serial numbers are found on serial plate on the rear of machine and inside door Wiring Diagram The wiring diagram is located in the ...

Page 8: ...e not been damaged removed or painted Refer to Parts Manual for ordering replacement decals Safety Precautions for Servicing Tumblers Prior to servicing tumbler Disconnect electrical service and lockout to prevent unintentional connection Shut off supply gas valve Allow machine to cool prior to servicing After servicing tumbler Control access panels must be reinstalled Motor drive belt guards must...

Page 9: ... exhaust fan pulls fresh air in through the air intake and over the heat source burner flame for gas heating element for electric and coil for steam The heated air moves into the cylinder where it is circulated through the laundry by the tumbling action of the cylinder The air then passes through the lint filter exhaust fan and is vented to the outdoors TMB1748S Fresh Air Combustion Air Mixed Air ...

Page 10: ...replace if inoperative Lint door not closed or inoperative lint door switch Close lint door confirm switch is positioned to actuate with door closed Trunnion shaft assembly binding in trunnion housing bearings Replace trunnion housing bearings Start circuit not completed Press start switch or test switch and replace if inoperative Idler shaft binding in idler housing bearings Replace bearings Inop...

Page 11: ...ectrician to ensure that wiring is adequate Inadequate make up air Refer to Installation Manual for make up air requirements Poor maintenance Clean lint accumulation on and around the motor Broken loose or incorrect wiring Refer to wiring diagram located inside contactor box POSSIBLE CAUSE TO CORRECT Motor drive pulley loose Confirm key is in place tighten setscrews Sheave loose Confirm key is in ...

Page 12: ...control Select temperature option Inoperative control relay Test relay and replace if inoperative Inoperative thermistor Test thermistor by removing harness from thermistor terminals Check resistance across terminals should read approximately 50 000 Ohms at 77 F Resistance should decrease with a temperature increase Replace thermistor if inoperative Electric Models Inoperative heating elements or ...

Page 13: ...mit thermostat Test thermostat and replace if inoperative Gas and Electric Models Inoperative airflow switch Clean lint compartment after every eight hour shift Check back draft damper for foreign objects lint accumulation or other causes that may prevent damper from opening Check ductwork for lint build up Refer to Installation Manual to ensure that ductwork and make up air openings are sized pro...

Page 14: ...supply Open partially closed gas shut off valve or correct low gas pressure Improperly adjusted burner flame Refer to Adjustment Section for recommended burner flame adjustment Electrode assembly incorrectly installed Check assembly for correct alignment Inoperative igniter control Test igniter control and replace if inoperative Incorrect wiring Refer to wiring diagram located inside contactor box...

Page 15: ...tumbler ducts Clean tumbler ducts Lint in external exhaust system Disassemble exhaust system and clean High limit thermostat cycling at too low a temperature Replace thermostat Lint door panel not closed properly Open lint door panel place lint door panel back on tumbler ensuring a tight fit Backdraft damper not operating Check for foreign objects lint accumulation or other possible obstructions P...

Page 16: ...ction or lint build up from exhaust ductwork Refer to the Installation Manual for exhaust system requirements Inoperative thermistor Test thermistor by removing harness from thermistor terminals Check resistance across terminals should read approximately 50 000 Ohms at 77 F Resistance should decrease with a temperature increase Replace thermistor if inoperative Inoperative cabinet limit or burner ...

Page 17: ...l valves in supply and return lines make sure they are open Blocked steam trap Remove trap and clean Replace if inoperative Inoperative solenoid valve Check operation of solenoid valve Incorrect installation of check valve Check for inlet and outlet markings on check valve and invert if necessary Clogged strainer Remove strainer and clean Inoperative timer or thermistor Test timer Test thermistor ...

Page 18: ...or switch faulty Replace door switch Lint panel switch faulty Replace lint panel switch Electrical service connected incorrectly Check service connections to terminal block in junction box For 120 or 240 Volt tumblers neutral wire must be connected to terminal marked NEUT On single phase tumblers hot wire must be connected to terminal marked L1 A ground wire must be secured to the ground screw in ...

Page 19: ...WITCH CHECK FOR 24 VOLTS AT TERMINAL 3 OF CONTROL RELAY CHECK FOR 24 VOLTS TO MOTOR RELAY COIL CHECK FOR 24 VOLTS ACROSS COIL TERMINALS OF CONTROL RELAY HAS DOOR SWITCH BEEN ACTUATED CHECK FOR 24 VOLTS ON TERMINAL B OF DRYING TIMER CHECK FOR 24 VOLTS ON TERMINAL 5 OF CONTROL RELAY CHECK FOR 24 VOLTS INTO PUSH TO START SWITCH PRESS PUSH TO START SWITCH CHECK FOR 24 VOLTS OUT OF PUSH TO START SWITCH...

Page 20: ... YES CHECK FOR BROKEN OR LOOSE WIRE AT HARNESS PLUG POWER OUT OF TEMPERATURE CONTROL BOARD NO CHECK THE IGNITION CIRCUIT YES POWER INTO TEMPERATURE CONTROL BOARD NO COIN SWITCH B NORMALLY CLOSED CD MODELS POWER ON TERMINAL 4 OF CONTROL RELAY MANUAL TIMER MODELS NO COIN SWITCH B COMMON CD MODELS POWER ON TERMINAL 6 OF CONTROL RELAY MANUAL TIMER MODELS NO CHECK THERMISTOR AND CABLE IF OK REPLACE TEM...

Page 21: ... Laundry Systems LLC DO NOT COPY or TRANSMIT 19 NO MAIN BURNER FLAME IGNITER DOES NOT SPARK IGNITER SPARKING NO YES GREEN WIRE FROM IEI CONTROL CONNECTED TO GROUND TERMINAL IEI CONTROL IN SAFETY LOCKOUT RESET BY OPENING AND CLOSING DOOR RESISTANCE OF HIGH VOLTAGE LEAD GREATER THAN 25 000 OHMS OR LESS THAN 5 000 OHMS NO YES CONNECT GREEN WIRE TO GROUND TERMINAL IGNITER GAP IS NOT 5 32 IN 397 CM OR ...

Page 22: ...Hertz 3 Phase Reversing and Nonreversing Step Problem If No then 1 Is there voltage at H2 13 If yes continue to next step Replace micro control 2 Is there voltage at H2 6 If yes continue to next step Correct wiring between H2 6 and H2 13 3 Is there voltage at H2 5 If yes continue to next step Check for proper thermistor operation Replace micro control if necessary 4 Is there voltage to the input o...

Page 23: ...mer 3 Is there voltage to the COM terminal of the door switch If yes continue to next step Correct wiring between door switch and transformer Check fuse 4 Is there voltage to the N O terminal of the door switch If yes continue to next step Check door switch for proper operation Replace if necessary 5 Is there voltage to the COM terminal of the lint panel switch If yes continue to next step Correct...

Page 24: ...40 Volt 60 Hertz 3 Phase Gas and Steam Reversing Nonreversing 208 240 Volt 60 Hertz 3 Phase Electric Reversing Nonreversing 460 480 Volt 60 Hertz 3 Phase Gas Electric and Steam Reversing Nonreversing Step Problem If No then 1 Is there voltage across the primary of the transformer If yes continue to next step Correct wiring between transformer and supply voltage Check fuses 2 Is there 24 VAC across...

Page 25: ...elay 6 Is there voltage at white brown fan motor centrifugal switch Correct wiring between relay and motor switch 7 Is there voltage at orange brown fan motor centrifugal switch Replace motor 8 Is there voltage to cabinet limit black wire Correct wiring between fan motor centrifugal switch and cabinet limit thermostat 9 Is there voltage out of cabinet limit white wire Replace thermostat 10 Is ther...

Page 26: ... motor switch If yes continue to next step Correct wiring to fan motor switch 7 Is there voltage out from the fan motor switch If yes continue to next step Replace fan motor 8 Is there voltage to the input of the cabinet limit If yes continue to next step Correct wiring between cabinet limit and CR1 9 Is there voltage to the output of the cabinet limit If yes continue to next step Replace cabinet ...

Page 27: ...3 Is there voltage to the COM of the door switch If yes continue to next step Correct wiring to door switch Check fuse 4 Is there voltage to the N O terminal of the door switch If yes continue to next step Check door switch for proper operation Replace if necessary 5 Is there voltage into lint panel switch If yes continue to next step Correct wiring between door switch and lint panel switch 6 Is t...

Page 28: ...t actuated adjust switch as needed 7 Is there voltage to H2 8 terminal of micro control If yes continue to next step for forward rotation or Step 11 for reverse rotation Correct wiring between micro control and door switch 8 Forward Rotation Is there voltage to H2 3 of micro control If yes continue to next step Make sure unit is in the forward portion of rotation Replace micro control 9 Is there v...

Page 29: ...ntinue to next step Check door switch for proper operation replace if necessary 7 Is there voltage at COM of lint panel switch If yes continue to next step Correct wiring between door switch and lint panel switch 8 Is there voltage to NO of lint panel switch If yes continue to next step Adjust switch as needed 9 Is there voltage to the input side of the Push To Start button If yes continue to next...

Page 30: ... output of the stove limit If yes continue to next step Check for blockage and proper airflow Replace stove limit if necessary 8 Is there voltage to the COM terminal of switch B If yes continue to next step Correct wiring between switch B and stove limit 9 Is there voltage to the N C terminal of switch B If yes continue to next step Check for proper operation replace switch B if necessary 10 Is th...

Page 31: ...yes continue to next step Replace time delay board 5 Is there voltage to COM terminal of the door switch If yes continue to next step Correct wiring between door switch and switch A of the rotary coin drop 6 With the door closed is there voltage to the N O terminal of the door switch If yes continue to next step Check door switch for proper operation replace if necessary 7 Is there power at COM of...

Page 32: ... 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 electri...

Page 33: ... strap Due to the sensitivity of electronic controls careful handling is required Wrist strap cord and alligator clip are designed to carry away any electrostatic charge from your body and to direct charge to an available ground By using this static protection device potential electrostatic discharge problems associated with handling of electronic control will be minimized Always handle electronic...

Page 34: ... wire nut 34 COIN METER TIMER MOTOR Refer to Figure 1 a Remove controls b Remove two screws holding motor to mounting bracket c Hold cam and drive fork against inside face of motor mounting bracket and pull motor free of cam and drive fork d Disconnect motor leads e Slide cam and drive fork out from under motor mounting bracket NOTE Refer to wiring diagram when rewiring timer motor 35 COIN METER R...

Page 35: ...9301 35 Section 5 Service Procedures Copyright Alliance Laundry Systems LLC DO NOT COPY or TRANSMIT Figure 1 TMB1749S HEAT SWITCH SWITCH ACTUATOR COIN METER TIMER MOTOR RUN SWITCH BRACKET CAM AND DRIVE FORK ...

Page 36: ...nty d Remove two screws attaching ignition control unit to cabinet frame e Remove ignition control 38 GAS VALVE Refer to Figure 2 a Remove control panel b Close gas shut off valve c Disconnect all wires from gas valve terminals and disconnect gas valve pipe unions d Remove screws holding gas valve bracket to stove e Remove spudholder and manifold from left side of valve and plug from right side of...

Page 37: ...2 TMB1244P TMB1256P BURNER TUBES SPARK IGNITER GAS VALVE BRACKET GAS SHUTOFF VALVE Non EU Models GAS VALVE MANIFOLD PIPE SPUD HOLDER MAIN HARNESS IGNITION CONTROL HIGH VOLTAGE LEAD GAS SHUTOFF VALVE EU Models IGNITION RESET SWITCH EU Gas Models Only FUSE Non EU Models CONTROL HARNESS ICM RETURN Australian Models ...

Page 38: ...erminal blocks NOTE Refer to wiring diagram when rewiring contactors or terminal blocks c Remove screws holding contactor to box d Remove two screws holding terminal block to box NOTE Use a 3 pole terminal block 41 HEATER ELEMENT Electric Models Refer to Figure 3 a Remove two screws holding hood to top of cabinet and lift hood assembly off heater housing b Remove nuts wires and jumper bars from el...

Page 39: ...ystems LLC DO NOT COPY or TRANSMIT Figure 3 TMB1249P TMB1248P NON EU MODELS HEATER CABLE HEATER CABLE HARNESSES EU MODELS JUMPER WIRE HIGH LIMIT THERMOSTAT JUMPER BAR JUMPER BAR HIGH LIMIT THERMOSTAT HEATER ELEMENT JUMPER WIRE HOOD ASSEMBLY HEATER HOUSING HEATER ELEMENT ...

Page 40: ...be reconnected to ensure that the tumbler is properly grounded W002 WARNING Copyright Alliance Laundry Systems LLC DO NOT COPY or TRANSMIT 42 STOVE HIGH LIMIT THERMOSTAT Gas Models a Remove two screws holding thermostat and bracket to rear side of stove Refer to Figure 4 b Remove two screws holding cover to mounting bracket Refer to Figure 5 c Disconnect wires from thermostat d Remove two screws h...

Page 41: ...efer to Figure 6 a Disconnect electrical service to tumbler b Remove lint compartment door c Remove two screws holding thermostat mounting bracket to cylinder shroud d Remove two screws holding cover to mounting bracket e Disconnect two wires from thermostat f Remove two screws holding thermostat to mounting bracket g To remove thermostat wire assembly 1 Pull wires through bushing in thermostat mo...

Page 42: ...t of heater and remove thermostat Refer to Figure 3 NOTE Refer to wiring diagram when rewiring thermostat 45 THERMISTOR Refer to Figure 6 a Unlock and remove the lint panel b Remove two screws holding the perforated cover to the thermistor bracket c Disconnect the wires from the back of the thermistor d Unscrew thermistor from bracket NOTE Refer to the wiring diagram when reconnecting the wires to...

Page 43: ...Alliance Laundry Systems LLC DO NOT COPY or TRANSMIT 47 LOADING DOOR ASSEMBLY Refer to Figure 7 a Open loading door b Remove screw from lower hinge cam c While supporting lower hinge cam raise door to clear setscrew located in cam d Slide lower cam down and out of hinge lug e Lift door assembly up and out of hinge lug 48 DOOR HINGE Refer to Figures 7 and 8 a Remove door assembly b Remove nuts and ...

Page 44: ...ed Whenever ground wires are removed during servicing these ground wires must be reconnected to ensure that the tumbler is properly grounded W002 WARNING Copyright Alliance Laundry Systems LLC DO NOT COPY or TRANSMIT 50 FRONT PANEL a Remove control panel b Unlock open and remove lint panel Set aside to prevent damage c Remove loading door assembly d Support front panel and remove all screws holdin...

Page 45: ... bracket NOTE After reinstalling airflow switch and mounting bracket into switch box adjust switch Refer to Adjustments section 52 DRIVE GUARD Refer to Figure 10 a Support drive guard and remove screws holding guard to rear of tumbler b Reinstall drive guard 53 DRIVE BELT Reversing Tumblers Refer to Figure 25 a Remove drive guard b Loosen cap screws attaching idler housing to guide rails Loosen ja...

Page 46: ... Systems LLC DO NOT COPY or TRANSMIT 54 DRIVE BELT Nonreversing Tumblers Refer to Figure 24 a Disconnect electrical service to tumbler b Remove drive guard Refer to Figure 10 Remove two screws holding belt guard assembly to motor bracket Refer to Figure 12 Remove belt guard c Loosen cap screws on idler housing Drop idler housing to bottom of slots by loosening jam nut by turning adjustment screw d...

Page 47: ... Figure 13 a Remove idler housing assembly b Remove sheave and drive pulley c Remove cap screws holding idler housing to guide rails d Support idler housing assembly and carefully drive idler shaft from housing using a hammer and a hardwood dowel e Support idler housing assembly and remove bearings from housing using a hammer and a hardwood dowel f Reinstall shaft and bearings IMPORTANT When insta...

Page 48: ...RUNNION HOUSING ASSEMBLY a Remove cylinder assembly b Remove upper guide rail bolt and nut c Remove four adjusting screws holding trunnion housing assembly to rear of cabinet Refer to Figure 14 d Remove four bearing retainer screws holding the small bearing in housing Refer to Figure 14 e Use a hammer and hardwood dowel to remove bearings IMPORTANT When installing new bearings apply a film of oil ...

Page 49: ...ve cylinder assembly b Remove the four washers and nuts holding trunnion shaft assembly to rear of cylinder IMPORTANT When installing trunnion assembly on cylinder the cylinder and shaft must be aligned Refer to Figure 15 for an example of how to check for proper alignment of the shaft and cylinder Measure the distance between the center of the trunnion shaft and the outer rim of the cylinder at t...

Page 50: ...4 d Loosen nut on idler housing attaching bolt and lower idler housing to bottom of slots This is to put slack in drive belt so it can be slipped off the motor pulley without risk of damage e Remove two screws holding drive guard to motor bracket and remove belt guard Refer to Figure 12 f Remove nut and washer from lower guide rail bolt Refer to Figure 24 NOTE After removing belt replace the lower...

Page 51: ...Copyright Alliance Laundry Systems LLC DO NOT COPY or TRANSMIT m Remove locknut and jam nut holding fan on motor shaft Refer to Figure 18 Pull fan off motor shaft NOTE Fan is keyed to motor shaft and may have to be removed using a puller Look for a spacer washer at the bottom of the fan keyway Take care to avoid losing or damaging the spacer washer n Remove spacer washer from motor shaft Refer to ...

Page 52: ...when rewiring motor b Remove nut and washer from lower guide rail bolt Refer to Figure 24 c Remove the seven fan housing cover attaching screws Refer to Figure 16 d Remove the two cap screws and two sets of nuts and washers holding motor bracket to rear of tumbler cabinet Refer to Figure 16 e Using the guide rails as supports swing motor and fan assembly out and away from rear of tumbler Refer to ...

Page 53: ...NDER DRIVE MOTOR Reversing Tumblers Refer to Figure 19 a Support drive guard and remove the screws holding it to the back panel of the tumbler b Loosen locking bolt and back adjusting screw out to loosen belt Refer to Figure 25 c Slip drive belt off of the motor pulley d Disconnect the wire harness from motor e Remove the four cap screws nuts lockwashers and flat washers holding the motor to the m...

Page 54: ...s LLC DO NOT COPY or TRANSMIT Section 6 Adjustments 61 LEVELING LEGS Refer to Figure 20 NOTE It is recommended that the front of the tumbler be kept slightly higher than the rear approximately 1 8 inch 3 0 mm This will prevent the clothes while tumbling from wearing on the door glass gasket a Check the front to rear level by rotating the clothes cylinder until one of the cylinder ribs is at the bo...

Page 55: ...b Start the tumbler and check the flame pattern Correct air and gas mixture is indicated if the flame pattern is primarily blue with small yellow tips and bends to the right of the heater section Too little air is indicated if the flame is yellow lazy and smoky c To adjust the air inlet shutter loosen adjusting screws d Push or pull shutters in or out as necessary to obtain desired flame intensity...

Page 56: ...nsitivity The counterweight should be adjusted so the disc moves away from the cabinet when the lint panel is opened 1 1 2 in 38 1 mm with a full load Adjust the airflow switch as follows a Load the tumbler This adjustment is much faster to make with one person opening lint panel in front and another adjusting the counterweight in the rear of tumbler b Temporarily tape down the lint panel safety s...

Page 57: ...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 Copyright Alliance Laundry Systems LLC DO NOT COPY or TRANSMIT Figure 22 T041IE3A AIR FLOW SWITCH COUNTERWEIGHT SPRING CLIP DISC SWITCH LEVER MOUNTING BRACKET REAR PANEL OF TUMBLER AIR FLOW SWITCH VAN...

Page 58: ...dway between sheave and motor pulley Reversing Belt Drive Models Proper tension is when each cylinder belt can be depressed approximately 3 16 inch 4 77 mm by applying light thumb pressure approximately 5 pounds at a point midway between the sheave and the idler Nonreversing Models Refer to Figure 24 a Remove guard from rear of tumbler b Loosen idler housing capscrews holding idler housing to the ...

Page 59: ...iance Laundry Systems LLC DO NOT COPY or TRANSMIT Figure 24 T234IE3F POLY V BELT Self adjusting TRUNNION HOUSING ADJUSTING BOLTS TRUNNION HOUSING BOLTS IDLER HOUSING ASSEMBLY DRIVE V BELT GUIDE RAILS IDLER HOUSING BOLTS 2 ADJUSTING BOLT NONREVERSING ...

Page 60: ...ts Copyright Alliance Laundry Systems LLC DO NOT COPY or TRANSMIT Figure 25 T322IE3A DRIVE BELT IDLER HOUSING ASSEMBLY CYLINDER BELTS IDLER HOUSING BOLTS 2 LOCKING BOLT ADJUSTING BOLT Not Shown ADJUSTING SCREW ADJUSTING NUT REVERSING ...

Page 61: ...inder rim Proper adjustment is when the gap is 1 2 3 4 inch 12 7 19 05 mm Refer to Figure 26 b Remove drive guard c Loosen the four trunnion housing bolts Refer to Figure 24 d Loosen the locknuts on the trunnion housing adjusting bolts Refer to Figure 24 e Turn the adjusting bolts in or out as necessary to obtain proper clearance between cylinder rim and front panel NOTE Turning the adjusting bolt...

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