ADC AD-464 manuale d’uso

ADC Part No. 450186 020399DMG/abe American Dryer Corporation 88 Currant Road Fall River , MA 02720-4781 T elephone: (508) 678-9000 / Fax: (508) 678-9447 e-mail: techsupport@amdry .com AD-464 Service Manual[...]

Retain This Manual In A Safe Place For Future Reference Replacement parts can be obtained from your distributor or the ADC factory . When ordering replacement parts from the factory , you can F AX your order to ADC at (508) 678-9447 or telephone your orders directly to the ADC Parts Department at (508) 678-9000. Please specify the dryer model numbe[...]

IMPOR T ANT YOU MUST DISCONNECT and LOCKOUT THE ELECTRIC SUPPL Y and THE GAS SUPPL Y or THE STEAM SUPPL Y BEFORE ANY COVERS or GUARDS ARE REMOVED FROM THE MACHINE TO ALLOW ACCESS FOR CLEANING, ADJUST- ING , INST ALLA TION, or TESTING OF ANY EQUIPMENT per OSHA (Occupational Safety and Health Administration) ST ANDARDS. CHILDREN SHOULD NOT BE ALLOWED[...]

W ARNING The dryer must never be operated with any of the back guards, outer tops, or service panels removed. PERSONAL INJUR Y or FIRE COULD RESUL T . IMPOR T ANT PLEASE OBSER VE ALL SAFETY PRECAUTIONS displayed on the equipment and/or specified in the installation and operator's manual included with the dryer . Dryers must not be installed or[...]

Table of Contents SECTION I SAFETY PRECAUTIONS .................................................................................................................. 3 SECTION II ROUTINE MAINTENANCE ............................................................................................................ .5 A. Cleaning ...............................[...]

SECTION VIII SPRINKLER SYSTEM ............................................................................................................... ..... 81 A. Sprinkler System Description .................................................................................................... 81 SECTION IX AIR JET SYSTEM .....................................[...]

3 SECTION I SAFETY PRECAUTIONS CAUTION: The dryer should never be left unattended while in operation. W ARNING : For your safety , the information in this manual must be followed to minimize the risk of fire or explosion or to prevent property damage, personal injury , or loss of life. W ARNING: The dryer must never be operated with any of the back[...]

4 W ARNING : DO NOT dry mop heads. Contamination by wax or flammable solvent will create a fire hazard. W ARNING : DO NOT use heat for drying articles that contain plastic, foam, sponge rubber , or similarly textured rubberlike materials. Drying in a heated basket (tumbler) may damage plastics or rubber and also may be a fire hazard. 7. A program s[...]

5 SECTION II ROUTINE MAINTENANCE A. CLEANING A schedule should be established for periodic inspection, cleaning, and removal of lint from various areas of the dryer , as well as throughout the duct work system. The frequency of cleaning can best be determined from experience at each location. Maximum operating efficiency is dependent upon proper ai[...]

6 MONTHL Y Empty the compressed air filter bowl. Clean any lint accumulation from the gas valve and burner area at the top of the dryer , the fan (impellor/ blower) motor , and the fan (impellor) bearings located in the dryer base. EVERY 6 MONTHS STEAM MODELS - clean the steam coil fins. W e suggest using compressed air and a vacuum cleaner with br[...]

7 B. LUBRICA TION MONTHL Y Check compressed air filter bowl for water . Empty by pressing the rubber petcock to the side. Additionally , check lubricator bowl for oil. If empty , remove the fill plug and add oil. ( Use petroleum based 10/150 SSU misting oil.) Replace the fill plug. NOTE : LUBRICA TOR SHOULD BE SET A T 1 DROP PER CYCLE . NOTE : REGU[...]

8 EVERY 6 MONTHS Change gear oil in the tumbler shaft gear reducer . 1. Remove the drain plug (located at the bottom rear of the reducer). 2. After oil is completely drained replace the drain plug. 3. Remove the vent plug and pour in 1.4 liters of Mobil Oil DTE HH5G ( I.S.O. viscosity grade 460), SAE 90, or equivalent. C. ADJUSTMENTS 7 DA YS AFTER [...]

9 SECTION III SPECIFICA TIONS A. GAS MODELS (ADG-464) NOTE : ADC reserves the right to make changes in specifications at any time, without notice or obligation. * Gas pressure into the dryer cannot exceed 13" W .C. (water column). If the gas supply pressure is higher than 13" W .C., an external regulator must be installed. MA X I MUM CA P[...]

10 B. STEAM MODELS (ADS-464) NOTE : ADC reserves the right to make changes in specifications at any time, without notice or obligation. * Size of piping to dryer varies with installation conditions. Contact factory for assistance. MA X I MU M CAP AC ITY (D RY W EIGHT ) 460 lb s . 2 09. 0 9 kg T O TA L W E I GH T 11,000 l b s . 4,949. 6 kg T O T A L[...]

11 NOTE : ADC reserves the right to make changes in specifications at any time, without notice or obligation. C. ELECTRICAL SER VICE SPECIFICA TIONS 1. Gas Models 2. Steam Models AD G -464 ( G AS ) E LEC TRI C AL S ERVI C E S PE C I FICA T ION S ( PE R D R Y E R )* I MP ORTANT : 2 08 V AC a nd 240 V A C ARE NO T THE SAM E . Whe n o r de ring , s pe[...]

12 SECTION IV INST ALLA TION REQUIREMENTS Installation should be performed by competent technicians in accordance with local and state codes. In the absence of these codes, installation must conform to applicable AMERICAN NA TIONAL ST ANDARDS: National Fuel Gas Code ANSI Z223.1-LA TEST EDITION and/or National Electric Code ANSI/NFP A No. 70-LA TEST[...]

13 B. ELECTRICAL REQUIREMENTS and GAS REQUIREMENTS It is your responsibility to have ALL electrical connections made by a properly licensed and competent electrician to assure that the electrical installation is adequate and conforms with local and state regulations or codes. In the absence of such codes, ALL electrical connections, material, and w[...]

14 SECTION V COMPONENT DESCRIPTION/REPLACEMENT A. TUMBLER SUPPOR T and DRIVE SYSTEM IMPOR T ANT : Always keep the tumbler (basket) section of the dryer in an upright position when moving it. 1. T umbler The tumbler is made of five (5) 14 gauge stainless steel perforated panels, five (5) stainless steel lifting ribs, and two (2) outer tumbler rings.[...]

15 3. T umbler and Basket Drive System There are two (2) 5 HP tumbler drive motors. Each motor drives one of the 2-inch diameter tumbler drive shafts, and the motors spin simultaneously so that ALL four (4) sets drive wheels work together to spin the tumbler . Each motor is connected to the drive shaft by two (2) “A” section V-belts, driving a [...]

16 B. MAIN AIR BLOWER/HEA T RECLAIMER SYSTEM The fan which moves the exhaust air through the dryer is a 22-inch diameter , squirrel cage fan that is driven at 1,100 rpm by a 25 HP motor . This fan moves a maximum of 13,000 cfm air through the dryer .[...]

17 The dryer is equipped with a pneumatically operated heat reclaimer damper , which when opened, will recirculate approximately fifteen percent (15%) of the dryer ’ s exhaust air . The heat reclaimer dampener is closed until ignition of flame has been established. Then, the damper piston is actuated, opening the damper and recirculating fifteen [...]

18 FILTER / REGULATOR The filter consists of a louver which causes a centrifugal spinning action to separate contaminants. A filter which mechanically separates contaminants is also present. The filter bowl collects the contaminants and a baffle prevents turbulence from picking up contaminants at the bottom of the bowl and returning them to the air[...]

19 b. Regulator Operation The adjustment knob simply acts upon a spring rest located on the spring and directly compresses the spring as it is adjusted. A non-rising low torque adjustment screw is used on this type of filter and regulator . The upper spring rest is located on top of the regulator spring and transmits force from the adjustment screw[...]

20 T o tilt the dryer back, a 120 volt signal is applied to the front pistons solenoid connector #S5, and no voltage is applied to the solenoid connector #S8. The internal spool in the valve will move and 80 PSI of air will enter the bottom port of the front tilting pistons, extending the front tilting piston rods and tilting the dryer back for loa[...]

21 T o open the front loading door , a 120 volt signal is applied to S1, the coil of the valve that supplies air to the load door or the heat reclaimer ’ s bottom port. The valve will open, and 80 PSI of air is supplied to the bottom port of the piston. The piston rod will extend, and the door will open. No voltage is applied to S2, the coil of t[...]

22 D. SAFETY DEVICES The dryer is equipped with numerous safety devices to ensure that the dryer operates safely . The chart on the following page ( page 23 ) lists each device with its location, function, computer display message, and result of tripping.[...]

23 1. Safety Devices Locations/Functions/Messages S AFET Y D EVIC ES L OCAT ION F UNCTION C OM PUT E R D IS P LA Y M ESSAG E R ESUL T O F T RIP P IN G L oad Do or S w i tch L eft s ide of L oa d door Ens ur e s drye r lo ad do or s ar e cl o se d "D OOR OPEN" Dryer w i ll no t r un Unload door s w itch (T wo door unit only) Right si de of[...]

24 E. BLOWER (Squirrel Cage Fan) MOT OR ASSEMBL Y 1. Blower (Squirrel Cage Fan) Motor Description The dryer uses a 22-1/4 inch diameter blower (squirrel cage fan). It rotates (spins) in a counterclockwise (CCW) direction, when viewed at the blower motor . The blower shaft is mounted on two (2) 1-3/4 inch diameter pillow block bearings and is driven[...]

25 5) Remove the bolts from the bushing. 6) Insert the bolts into the threaded holes. 7) T ighten the bolts evenly for motor pulley removal. 8) Mark the inside of the motors' shaft before removing the bushing. 9) Loosen the set screws in the bushing. 10 ) Remove the bushing. 1 1 ) Measure the mark on the motors' shaft (from Step #8 ) to t[...]

26 b. Shrouded Pillow Block Bearing Replacement 1) Discontinue electrical service to the dryer . 2) Remove the belt guard. 3) Loosen the bolts securing the blower motor to the motor base. 4) Remove the V-belts from the motor pulley and the pulley on the blower shaft. CAUTION : THE BLOWER (Squirrel Cage) F AN IS LOCA TED IN THE LINT COMP AR TMENT . [...]

27 15 ) Replace the shrouded pillow block bearing on the blower shaft... a ) Secure the blower shaft to the blower shaft bearing mount. b) T ighten/secure the set screws in the shrouded pillow block bearing. NOTE : Install the 3/8" x 3/8" x 3" key on to the blower shaft before installing the blower (squirrel cage fan). c ) Reinstall [...]

28 5) Remove the two (2) left hand jam nuts and the washers. 6) Remove the blower (squirrel cage fan) along with the 3/8" x 3/8" x 3" key from the blower shaft. NOTE : Install the 3/8" x 3/8" x 3" key on to the blower shaft before installing the blower (squirrel cage fan). 7) T o install new blower (squirrel cage) fan,[...]

29 F . BLOWER (Squirrel Cage Fan) ELECTRICAL COMPONENTS 1. Blower (Squirrel Cage Fan) Controls and Overloads a ) Thermal Magnetic Starter (TMS) Description The thermal magnetic starter (TMS) is used as a safety device to manually disconnect the motor , thereby protecting the motor from being damaged in a locked rotor condition. The overload has a d[...]

30 2. Auxiliary Contact Block Description The auxiliary contact block is mounted on the side of the overload. Its' function is to sense an overload trip, thereby triggering a safety fault which will disable the drying cycle. A motor fault message will appear on the display of the T elemecanique XBT unit. a . Auxiliary Contact Block Replacement[...]

31 G. TUMBLER (Basket) SYSTEM 1. T umbler (Basket) Drive Description The tumbler (basket) is supported and driven by four (4) 1 1-inch diameter heavy duty rubber roller wheels. The rubber wheels are molded onto each of four (4) steel hubs. The steel hubs are fastened to the 2-inch diameter tumbler drive shafts by taper lock bushings. Each drive sha[...]

32 2. T umbler (Basket) Drive System Replacement a . T umbler (Basket) Drive Wheel Replacement 1) Discontinue electrical service to the dryer . 2) Disconnect air supply to the dryer . 3) Remove front panels or rear panels that are secured to the front or rear tumbler section of the dryer by removing the access bolts. 4) Remove the eight (8) 3/8-16 [...]

33 16 ) Remove the taper lock bushing. 17 ) Remove the drive wheel. 13 ) T ighten the bolts evenly for wheel removal. 18 ) T o install new drive wheel, reverse S tep #17 thru Step #3 . 19 ) Reconnect air supply disconnected in Step #2 . 20) Reestablish electrical power to the dryer . b. 5 HP Drive Motor Replacement 1) Discontinue electrical service[...]

34 1 4 Check that the motor pulley is properly aligned. 15 ) Secure the drive motor to the motor mount. 16 ) T ighten the turnbuckle. IMPOR T ANT : DO NOT OVERTIGHTEN TURNBUCKLE. 17 ) Rewire the new drive motor in the same sequence as the wiring that was removed in Step #2 . A wiring diagram is usually affixed to the side of the motor . 18 ) Reesta[...]

35 10 ) Insert bolts into the holes of the taper lock bushing and thread into the motor pulley , then tighten evenly . 1 1 ) Check that the motor pulley is properly aligned. 16 ) Reinstall the V-belts removed in Step #2 . 17) T ighten the turnbuckle. IMPOR T ANT : DO NOT OVERTIGHTEN TURNBUCKLE. 18 ) Reestablish electrical service to the dryer . e .[...]

36 CAUTION : Replacement gear (speed) reducers are shipped without oil. Add proper amount (1.4 liters) of recommended lubricant before operating. F AILURE TO OBSER VE THESE PRECAUTIONS WILL RESUL T IN DAMAGE TO THE DRYER AND WILL V OID THE W ARRANTY . CAUTION : T O MUCH OIL IN THE GEAR REDUCER WILL CAUSE OVERHEA TING and T OO LITTLE OIL WILL RESUL [...]

37 17 ) Reinstall V-belts and tighten the turnbuckle. IMPOR T ANT : DO NOT OVERTIGHTEN TURNBUCKLE. 18 ) Prior to operating the new gear (speed) reducer , fill with 1.4 liters of SAE 90 gear oil. 19 ) Mount the pillow block bearing on the mounting pads (using the bolts that were removed). IMPOR T ANT : DO NOT OVER TIGHTEN BOL TS. 20 ) Reverse Step #[...]

38 W ARNING: ALL SERVICE and TROUBLESHOOTING SHOULD BE PREFORMED BY A QUALIFIED PROFESSIONAL or SER VICE AGENT . W ARNING: WHILE MAKING ADJUSTMENTS, OBSER VE ALL SAFETY PRECAUTIONS DISPLA YED ON THE DR YER or SPECIFIED IN THIS MANUAL. 6) Reestablish electrical service to the dryer . Proceed to Retaining Wheel Adjustment instructions immediately bel[...]

39 H. ROT A TIONAL SENSOR ASSEMBL Y The rotational sensor is a self-contained, motion detector proximity sensor , designed to detect a predetermined stopped drum (basket/tumbler) condition. The rotational sensor is used as a safety device, once the drum has stopped rotating for more than 12-seconds. After this 12-second interval has been reached, t[...]

40 (1) Rotational Sensor Adjustment Distance Adjustment; • Pull the rotational sensor as far away from the basket (tumbler) as possible. • Spin/rotate the basket (tumbler) until the target (target lines up behind one of the basket ribs) is aligned with the rotational sensor . Mark basket (tumbler) rib with tape. • The rotational sensor has to[...]

41 I. T OP OF TUMBLER (Basket) TEMPERA TURE DOOR ASSEMBL Y 1. Intake T emperature Probe/Sprinkler T emperature Probe The intake temperature probe and sprinkler temperature probe are 100 ohm (100 Ω ) Resistive T emperature Device (R TD) probes located on the top of the tumbler (basket) section of the dryer . The intake temperature probe measures t[...]

42 J. TUMBLER (Basket) ELECTRICAL COMPONENTS 1. Drive Motor Controls and Overloads a ) Thermal Magnetic Starter (TMS) Description The thermal magnetic starter (TMS) is used as a safety device to manually disconnect the motor , thereby protecting the motor from being damaged in a locked rotor condition. The overload has a dial setting on the face of[...]

43 2. Auxiliary Contact Block Description The auxiliary contact block is mounted on the side of the overload. Its' function is to sense an overload trip, thereby triggering a safety fault which will disable the drying cycle. A motor fault message will appear on the display of the T elemecanique XBT unit. a . Auxiliary Contact Block Replacement[...]

44 SECTION VI PLC (PROGRAMMABLE LOGIC CONTROLLER) SYSTEM A. PLC (Programmable Logic Controller) DESCRIPTION The heart of the dryer is a TSX17 PLC (Programmable Logic Controller) with twenty-one (21) inputs and twelve (12) outputs. The TSX17 PLC also uses two (2) expansion modules, a relay output module with six (6) outputs, and a 4 mA - 20 mA (mill[...]

45 • Input 0,9 is used to sense if the burner doors are closed. This is accomplished through DS4A and DS5A (Door Switch 4, A and Door Switch 5 , A) contact sets. If a drying cycle is attempted, the XBT unit will display "DOOR OPEN." • Input 0,10 is used to monitor a stopped tumbler (basket) condition. An inductive proximity sensor is [...]

46 The main module of the TSX17 PLC (Programmable Logic Controller) also has eleven (1 1) outputs to control various functions of the dryer . The outputs are relay contacts, whereby each of the relays have a common terminal tied to 1 10 V AC. • Output 0,0 is used to control the Main Blower Contactor . On a call for fan, the output supplies 1 10 V[...]

47 • Output 1,4 is the blower (fan) Air Jet which is used to clean lint off of the fan (blower). At the end of a cycle, the Air Jet turns on for 30-seconds. • Output 1,5 is the End of Cycle light. Once the dryer has reached the end of a cycle, the output turns on, illuminating the End of Cycle light. The output will turn off once a load or unlo[...]

48 B. PLC (Programmable Logic Controller) COMPONENT REPLACEMENT 1. TSX17 PLC (Programmable Logic Controller) Assembly The TSX17 Programmable Logic Controller (PLC) is made up of three (3) components. The first and main component is the TSX17 PLC, then the Relay Outputs, and the Analog Inputs. The TSX17 PLC has a ram back-up lithium battery . a . TS[...]

49 3. Lithium Battery a . Lithium Battery Replacement 1) Discontinue electrical service to the dryer . 2) Remove the battery cover which is located directly above the buss terminator on the TSX17 PLC (Programmable Logic Controller) by sliding the cover in an upward direction. NOTE : The lithium battery is attached to the cover and plugged into the [...]

50 4. Under V oltage Disconnect The dryer uses a 1 10 V AC under voltage disconnect. This 1 10 V AC is supplied from the sprinkler circuit. The sprinkler circuit is part of the safety circuit of the dryer . If the sprinkler circuit is in an alarm condition, the 1 10 V AC supply to the under voltage disconnect will become discontinued, shutting down[...]

51 5. Hi-Limit Controller The dryer utilizes six (6) channel controller (HLC-1) to monitor various locations on the dryer for over temperature faults. The hi-limit controller enables the dryer to continually monitor up to six (6) Resistive T emperature Devices (R TD's) at one time. Each channel is individual with set points. The hi-limit contr[...]

52 6. Gas Burner and Ignition System The dryer's gas burner system operates on a on or off gas rate sequences to accurately control the tumbler’ s (basket's) drying temperature. Maximum firing rate is 2.8 million btu/hr . Upon a call from heat, the dryer computer sends a 120 volt signal to the burner controller module (BCM) which initia[...]

53 a . Major Burner Components 1) Burner Controller Module (BCM) The burner controller module (BCM) provides effective burner flame safeguard control through adjustable purge and trial-for-ignition timing. The BCM insures that ALL dryer safety switch circuits are closed, delays ignition to allow the combustion chamber to vent, and insures that a he[...]

54 b. L.E.D. (Light Emitting Diode) and Neon Displays of the BCM (Burner Controller Module) 1) Operating Interlock - L.E.D. is lit when; ALL safety interlock switches are closed, applying a 1 10 V AC signal to terminal #7 of the burner controller module (BCM). 2) Operating Interlock - L.E.D. is not lit when; One (1) or more safety interlock switche[...]

55 8) Burner Fan Air Switch Status Indicator - Neon is not lit; • Air switch is not closed after start-up of burner fan. • Door interlocks are open. • A Combustion burner screen is clogged. • A door on the dryer is open. 9) T est/Reset Button When this button is pushed in, the burner controller module (BCM) will halt the ignition sequence, [...]

56 1) Burner Fan Air Switch The differential in air pressure is measured by the burner fan air switch, which is located next to the burner fan motor . If the combustion air is inadequate, this switch will prevent ignition. The setting of this switch is adjustable, and it should be set at approximately .59-inches (15 mm) of water column (W .C.) beca[...]

57 4) Combustion Air Damper T o produce the required combustion airflow , this damper can be adjusted. Remove the screen to get access to the damper . Moving the damper closer to the blower inlet opening will reduce the combustion airflow , and moving it away from the blower inlet opening will increase the airflow . T o measure the combustion airfl[...]

58 T op Motorized Gas V alve The valve sets the gas rate of 2,800,000 btu/hr (705,290 kcal/hr). T o achieve this rate, the gas pressure must be set for 2.5-inches (63.5 mm) water column for natural gas and 1.25-inches (31.8 mm) water column for L.P . (liquid propane) gas. T o adjust. loosen the pan head screw located on the front of the top motoriz[...]

59 c ) The burner controller module (BCM) checks that ALL of the dryer ’ s safety circuits are closed (terminal #7 of the [BCM]). If this is the case, then the green “operating interlocks” L.E.D. (light emitting diode) on the BCM will light. If a safety switch is open, the green L.E.D. will not light, and the red “SYSTEM UNSAFE” L.E.D. wi[...]

60 (5) If signal is less than 3 volts DC, then the pilot may be too small or too large, there may be a wiring connection between the flame rod and burner controller module (BCM), the flame rod may be dirty , (wash it with soap and water) or defective, or the grounding may be faulty . Once the flame probe signal is detected by the BCM, it waits 5-se[...]

61 (b ) Remove the two (2) 1/4" x 1/8" M.P .T . straight brass connectors from the burner fan air switch. ( c) Remove the 5/16-18 x 3/4" tap bolt as well as the 5/16" lock washer . (d) Mark and identify the wires for correct re- placement on the new burner air switch. ( e) Remove the cord grip from the burner fan air switch. h. [...]

62 1) Burner Fan Motor a ) Burner Fan Motor Replacement (1) Discontinue electrical service to the dryer . (2) Remove the four (4) #8-18 x 7/16" TEK screws which secure the inlet ring to the combustion air blower housing. (3) Remove the two (2) 1/2-20 left hand jam nuts as well as the 1/2-inch flat washer . (4) Remove the 6-1/4" squirrel c[...]

63 (3) For replacement of new 6-1/4" squirrel cage fan, reverse Step #4 thru Step #2 of the Burner Fan Motor Replacement instructions on the previous page ( page 62 ). (4) Reestablish electrical service to the dryer . 3) Burner Fan Electrical Components a ) Burner Fan Thermal Magnetic Starter (TMS) The thermal magnet starter (TMS) is used as a[...]

64 NOTE : Adjust one switch at a time. 3) Adjust the burner door switch to the outside of the dryer and tighten the 1/4-20 x 3/4" hex head machine bolts. 4 ) Close the burner doors and verify if PLC Input #9 is on. If PLC Input #9 is off, adjust the other burner door switch. (5) T o install the new auxiliary contact block, reverse S tep #4 thr[...]

65 b) Burner Door Switch Replacement 1) Discontinue electrical service to the dryer . 2) Loosen the 1/4-20 x 3/4" hex head machine bolts as well as the 1/4-20 hex nut. 3) Remove the four (4) Phillips head screws securing the burner switch cover plate to the switch body . 4) Mark, identify , and remove the wires from the burner door switch for [...]

66[...]

67 Heat Reclaimer - the dryer is equipped with a pneumatically operated heat reclaimer , which when open, will recirculate approximately fifteen percent (15%) of the dryers' exhausted air . The heat reclaimer damper is closed until ignition of flame has been established. 7) Remove the eight (8) 5/16-18 hex nuts as well as the four (4) 5/16&quo[...]

68 H EAT R ECL AI MER S ET TI NG S Z = 1-5/8 Y+Z=X Y %HR In c hes Rec la i me d 1- 1/8 " 1/2 " 7. 46 1- 1/ 4" 2- 5/ 8" 1" 15. 67 2-5 /8" 3- 1/8 " 1- 1/2 " 25. 37 4- 1/ 4" 3- 5/8 " 2" 34. 32 5-3/ 4" 4- 1/8 " 2- 1/ 2" 43. 28 7- 1/ 4" 4- 5/8 " 3" 50. 74 8-1/ 2" 5[...]

69 b . Cool Down Damper Piston Replacement 1 ) Discontinue electrical service to the dryer . 2 ) Discontinue the air supply to the dryer . 3 ) Remove the two (2) 1/4" poly x 1/4" M.P .T . connectors from the piston. 4 ) Loosen the 1/4-20 x 3/8" set screw from the clevis and remove the clevis pin. 5 ) Remove the piston from the damper[...]

70 b. Cable (W ire Rope) Replacement 1) Discontinue electrical service to the dryer . 2) Discontinue the air supply to the dryer . 3) Block the bottom load door in the closed position prior to disassembly of any parts. IMPOR T AN T : F AILURE TO BLOCK THE BOTTOM LOAD DOOR SECUREL Y IN THE CLOSED POSITION MA Y RESUL T IN PERSONAL INJURY . 4) Loosen [...]

71 NOTES : For proper cable (wire rope) routing, starting at the piston; A. Replace the cable (wire rope) thimble and wire rope clamp to one side of the cable. B . Secure the cable (wire rope) to the piston mount with the 3/8-16 x 1" bolt, 3/8" fender washer , 3/8" lock washer, and 3/8-16 hex nut. C . Feed the cable (wire rope) throu[...]

72 d. Load Door Closed Switch Replacement 1) Discontinue electrical service to the dryer . 2) Loosen and remove the two (2) screws securing the junction cover . 3) Remove the junction cover . 4) Mark and identify the wires that will be removed for proper reinstallation. 5) Remove the wires from the terminals. 6) Loosen and remove the two (2) mounti[...]

73 e . Load Door Closed Switch Adjustment 1) Discontinue electrical service to the dryer . 2) T o adjust the coil spring lever arm, hold the arm with a #10 metric (10 mm) wrench and loosen the nut. 3) Place the coil spring lever arm in the 1 o'clock position. IMPOR T ANT : V erify that the load door closed switch is not in the vertical positio[...]

74 5) With finger tip, gently push and turn bulb to unlock. NOTE : A piece of tubing with an inside diameter the size of the bulb may assist in bulb removal and replacement. 6) T o install new bulb, reverse S tep #5 thru S tep #2 . (Refer to previous page [ page 73 ].) 7) Reestablish electrical service to the dryer . h. End of Cycle Light Replaceme[...]

75 1 1 ) Place pivot arm in the 1 o'clock position for the front tilt switch and in the 11 o'clock position for the rear tilt switch. V erify that the body orientation and head orientation ar e correct. V erify that the tilt switch arm is not in the vertical position or damage will r esult. 12 ) Holding the tilt arm, tighten up (snug up) [...]

76 7) Pull the proximity switch out of the bushing. 8) Replace the proximity switch. 9) Gently reinstall the rubber bushing removed in Step #6 . 1 1 ) Adjust the distance between the proximity switch and the magnet to 3/8". 12 ) T ighten cap on the cord grip. 13 ) Reverse Step #4 thru Step #2 . 10 ) Reinstall lock washer (removed in Step #5 ) [...]

77 2. Lint Chamber Air Pressure Switch The lint chamber air pressure switch utilized in the dryer is used to insure that there is proper air flow through the dryer . If there is a problem with this air pressure switch an "AIR F AUL T" error message will be displayed via the L.E.D. (light emitting diode) on the T elemecanique XBT digital d[...]

78 c . Lint Chamber Air Switch Replacement 1) Discontinue electrical service to the dryer . 2) Remove the 1/4" x 1/8" M.P .T . straight connector . 3) Remove the 5/16-18 x 3/4" tap bolt, as well as the 5/16" lock washer . 4) Mark and identify the wires that will be removed for proper reinstallation. 5) Remove the cord grip from [...]

79 B. RESISTIVE TEMPERA TURE DEVICE (R TD) 1. R TD (Resistive T emperature Device) The gas dryer utilizes five (5) Resistive T emperature Devices (R TD's); • One (1) R TD probe is used to control the drying temperature in the tumbler (basket). • One (1) R TD probe is used to detect an over temperature condition in the dryers' intake. [...]

80 2. R TD (Resistive T emperature Device) Locations E XHAUST T EMPERA TURE /E XHAUST H I -L IMIT I NT AKE H I -L IMIT /S PRINKLER MAN4146 O VER B URNER H I -L IMIT[...]

81 SECTION VIII SPRINKLER SYSTEM A. SPRINKLER SYSTEM DESCRIPTION The sprinkler circuit on the dryer requires a dedicated single-phase (1ø) supply from the dryers' voltage. The sprinkler hi-limit temperature is 700º F (371.1 1º C). In the event of a hi-limit condition, contact #7 and contact #8 on the sprinkler controller will open, disablin[...]

82 d. Sprinkler Digital T emperature Controller The sprinkler digital temperature controller is a programmable microprocessor (computer). It is used to monitor temperature via a Resistive T emperature Device (R TD). NOTE : Operating parameters are preset at the factory and should not require any adjustment.[...]

83 2. Sprinkler System Component Replacement a . Resistive T emperature Device (R TD) Replacement The sprinkler digital temperature controller is a programmable microprocessor (computer). It is used to monitor temperature via a Resistive T emperature Device (R TD). NOTE : For R TD (Resistive T emperature Device) probe location, refer to the top ill[...]

84[...]

85 SECTION IX AIR JET SYSTEM A. AIR JET SYSTEM The dryer utilizes an air jet system so that at the end of each drying cycle 80 PSI of compressed air is blown across the blower squirrel cage fan to remove any lint build up that occurred during the drying cycle. 1. Air Jet V alve a . Air Jet V alve Replacement 1) Discontinue air supply to the dryer .[...]

86 SECTION X ST ACK V AL VE ASSEMBL Y A. PNEUMA TIC V AL VE The stack valve assembly consists of two (2) styles of pneumatic solenoids; • The first type of solenoid is a 2-position/4-way/4-port single operator with a spring return. This valve has a 120 V AC coil and spring return. W ith no power to the coil, air goes out of the B port and the A p[...]

87 1. Solenoid Coil a . Coil Replacement 1) Discontinue air supply to the dryer . 2) Discontinue electrical service to the dryer . 3) For models with a sprinkler system, discontinue water supply to the dryers' sprinkler system. 4) Loosen coil plug screw and remove the plug. 5) Car efully remove the coil mounting screw . IMPOR T ANT : T AKE NOT[...]

88 2. Solenoid V alve a . V alve Replacement 1) Discontinue air supply to the dryer . 2) Discontinue electrical service to the dryer . 3) For models with a sprinkler system, discontinue water supply to the dryers' sprinkler system. 4) Loosen coil plug screw and remove the plug. 5) Car efully remove the two (2) valve mounting screws. T ake noti[...]

89 MAN4223[...]

90 4. Internal Pilot and External Pilot Air Supply On two-way tilt dryers, a pneumatic safety circuit is incorporated to prevent both front and rear tilting pistons from extending their rods at the same time. When 120 volts is supplied to the “S5” side of the front tilting piston solenoid valve coil, the round internal spool in the core of the [...]

91 SECTION XI PENDANT ASSEMBL Y A. PENDANT ASSEMBL Y DESCRIPTION The pendant assembly is used on both the gas and steam model dryer . W ithin the pendant assembly there is a three (3) position selection switch used to tilt the dryer in the load tilted, unload tilted, or level position. When the load tilted or unload tilted selection is made, the lo[...]

ADC 450186 1 - 05/27/99-25 2 - 01/14/00-15[...]