American Dryer Corp. AD-758 manual

AD-758 Service Manual 052802ASILVA/mcronan ADC Part No. 450418 American Dryer Corporation 88 Currant Road Fall River, MA 02720-4781 Telephone: (508) 678-9000 / Fax: (508) 678-9447 e-mail: techsupport@amdry.com www.amdry.com[...]

Retain This Manual In A Safe Place For Future Reference American Dryer Corporation products embody advanced concepts in engineering, design, and safety. If this product is properly maintained, it will provide many years of safe, efficient, and trouble-free operation. ONLY qualified technicians should service this equipment. OBSERVE ALL SAFETY PRECA[...]

IMPORTANT YOU MUST DISCONNECT AND LOCKOUT THE ELECTRIC SUPPLY AND THE GAS SUPPLY OR THE STEAM SUPPLY BEFORE ANY COVERS OR GUARDS ARE REMOVED FROM THE MACHINE TO ALLOW ACCESS FOR CLEANING, ADJUSTING, INSTALLATION, OR TESTING OF ANY EQUIPMENT PER OSHA (Occupational Safety and Health Administration) STANDARDS. DO NOT STORE OR USE GASOLINE OR OTHER FLA[...]

IMPORTANT PLEASE OBSERVE ALL SAFETY PRECAUTIONS displayed on the equipment and specified in the installation manual included with the dryer. WARNING DRYER MUST NEVER BE OPERATED WITHOUT THE LINT FILTER OR SCREEN IN PLACE, EVEN IF AN EXTERNAL LINT COLLECTION SYSTEM IS USED. The wiring diagram for the dryer is located in the front electrical control [...]

SECTION I IMPOR T ANT INFORMA TION .......................................................................... 3 A. Safety Precautions ....................................................................................................................... 3 SECTION II ROUTINE MAINTENANCE ...............................................................[...]

SECTION V SER VICING ....................................................................................................... 16 Introduction .................................................................................................................................... 16 A. Computer Controls ....................................................[...]

3 SECTION I IMPOR T ANT INFORMA TION A. SAFETY PRECAUTIONS WARNING: 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. WARNING: The dryer must never be operated with any of the back guards, outer tops, or service panels removed. [...]

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

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

6 90 DA YS Remove lint from basket (tumbler), drive motors, and surrounding areas. Remove lint from gas valve burner area with a dusting brush or vacuum cleaner attachment. NOTE: To prevent damage, avoid cleaning and/or touching the ignitor/flame-probe assembly. Remove lint accumulation from inside control box and at rear area behind control box. 6[...]

7 SECTION III INST ALLA TION REQUIREMENTS Installation should be performed by competent technicians in accordance with local and state codes. In the absence of these codes, the installation must conform to applicable American National Standards: ANSI Z223.1- LATEST EDITION (National Fuel Gas Code) or ANSI/NFPA NO. 70-LATEST EDITION (National Electr[...]

8 B. ELECTRICAL 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 to local and state regulations or codes. In the absence of such codes, ALL electrical connections, materials, and workmanship must[...]

9 NOTE: Pressing keyboard (touch pad) “A,” “B,” “C,” “D,” or “F” will also start the dryer. Six (6) preprogrammed drying cycles (“A” through “F”) have been stored in the computer’s memory. (Refer to the Computer Operator’s Manual for details.) 3. Make a complete operational check of ALL the operating controls to assu[...]

10 SECTION IV DESCRIPTION OF P AR TS A. CONTROL PANEL (MICROPROCESSOR) Lifting the control door will reveal the control panel assembly. Opening the control panel will allow access to the major components which include the computer board and keyboard (touch pad). The keyboard (touch pad) inputs to the computer what temperature and program has been s[...]

11 D. DIRECT SP ARK IGNITION (DSI) MODULE (GAS MODELS ONL Y) The DSI module is a 24 VAC device designed to be the “controller” of the DSI system. When activated by the dryer controls, this module constantly monitors and controls the functions of the DSI system (i.e., spark activation, gas valve off and on, flame verification, etc.). Additionall[...]

12 G . BLOWER MOT OR AND IMPELLOR (NON-REVERSING) (Viewing from the front of the dryer). The blower motor is located on the back of the dryer at the lower right-hand corner. The impellor is a backward curved paddle wheel which is directly connected to the shaft of the blower motor. H. BLOWER MOT OR AND IMPELLOR (REVERSING) I. IDLER ASSEMBL Y (Viewi[...]

13 K. BASKET (TUMBLER) The basket (tumbler) consists of four (4) ribs and four (4) perforated panels, along with a front and back, which are screwed together as an assembly. The basket (tumbler) also consists of tie rods, which support the basket (tumbler) from the front to back. The basket (tumbler) support is used to mate the basket (tumbler) to [...]

14 N. HI-LIMIT (GAS MODELS ONL Y) A hi-limit thermostat is located at the burner. This is an automatic reset disc-type thermostat set at 330º F (166º C). If the flame in the burner should get too hot, this thermostat will shut off the burner. This is generally caused by low airflow through the dryer. O. AUT OMA TIC RESET THERMOST A T This is loca[...]

15 Q. LINT DRA WER SWITCH The lint drawer switch is located in the lint compartment and attached to the side of the lint drawer track. The lint drawer switch insures that the dryer will operate only when the lint drawer is completely closed. This is a safety device and should never be disabled. R. STEAM DAMPER SYSTEM The newest type system is calle[...]

16 SECTION V SER VICING INTRODUCTION ALL electrical/mechanical service or repairs should be made with the electrical power to the dryer disconnected (power off). WARNING: PERSONAL INJURY COULD RESULT. The information provided in this section should not be misconstrued as a device for use by an untrained person making repairs. Service work should be[...]

17 A. COMPUTER CONTROLS To Replace Computer 1. Discontinue electrical power to the dryer. 2. Disconnect main power harness from rear of computer by squeezing locking tab and pulling connector straight back. 3. Disconnect the green ground wire from the computer. 4. Disconnect keyboard (touch pad) ribbon from the computer. 5. Remove the two (2) hex n[...]

18 To Replace Microprocessor Temperature Sensor Probe 1. Discontinue electrical power to the dryer. 2. Remove lint drawer. Remove two (2) screws securing lint door and remove lint door. 3. Remove microprocessor sensor bracket assembly from the dryer. a. Disconnect sensor bracket harness connector. b. Loosen the two (2) Phillips head screws securing[...]

19 NOTES: Before reestablishing power to the dryer, visually check the following (refer to the illustration ): 1. The flame electrode, ignitor electrode, and ground rod are ALL on the same line axis. 2. There should be a 1/8” gap (+/- 1/32”) between the ignitor electrode and ground rod. 3. DO NOT wrap the red high voltage (HV) wire and the flam[...]

20 2. Unscrew main burner orifices and replace. NOTE: Use extreme care when removing and replacing orifices. These orifices are made of brass and are easily damaged. 3. Reversing the removal procedure for reinstalling. NOTE: Test ALL connections for leaks by brushing on a soapy water solution. NEVER TEST FOR LEAKS WITH A FLAME. To Test and Adjust G[...]

21 To Convert from Natural Gas to Liquid Propane (L.P.) Gas NOTE: ALL dryers are sold as natural gas, unless otherwise specified at the time the dryer order was placed. For L.P. gas the dryer must be converted as follows. 1. Refer to “Replace Gas Valve” and follow steps 1 through 6. 2. Remove the four (4) screws which secure the top cap assembl[...]

22 To Replace Direct Spark Ignition (DSI) Module 1. Discontinue electrical power to the dryer. 2. Remove the wires connected to the terminal strip at the bottom of the module. 3. Remove the four (4) screws securing the module to the mounting bracket. 4. Replace module by reversing procedure. 5. Reestablish electrical power to the dryer. C. THERMOST[...]

23 To Replace Lint Compartment Hi-Heat Protector (225º F [107º C]) Thermostat This thermostat is part of the “sensor bracket assembly” and is secured to the underside of the basket (tumbler) wrapper in the lint compartment. As a safety device, this thermostat will open (shut off) the heating unit circuit if an excessive temperature occurs. Th[...]

24 E. FRONT PANEL AND MAIN DOOR ASSEMBLIES To Replace Main Door Switch 1. Discontinue electrical power to the dryer. 2. Open main door. 3. Remove the two (2) Phillips head screws holding the main door switch bracket assembly in place. 4. Remove door switch bracket from front panel and disconnect wiring from switch. 5. Disassemble door switch from b[...]

25 To Install New Main Door Glass 1. Remove main door assembly from dryer (follow main door removal procedure). 2. Lay main door on flat surface with the front of the door facing up. 3. Remove the four (4) acorn nuts securing the glass. 4. Remove glass and clean ALL old sealant off main door. This area must be completely cleaned for correct bonding[...]

26 To Replace Main Door Hinge Blocks 1. Discontinue electrical power to the dryer. 2. Follow procedure for removal of main door assembly. 3. Disassemble bottom hinge block from front panel by removing the Allen head screws located inside the hinge block. 4. Reassemble by reversing removal procedure. 5. Reestablish electrical power to the dryer. To [...]

27 F . PULLEYS To Replace Basket (Tumbler) Pulley 1. Loosen V-belts. Rotate pulley and roll V-belts out of grooves. 2. Remove cap screws from the bushing. 3. Insert cap screws in tapped removal holes and tighten evenly until bushing becomes loose on shaft. (Refer to figure “A.”) 4. Remove bushing, pulley, and key. 5. Assemble bushing and sheave[...]

28 IMPORTANT: Tighten screws evenly and progressively. Never allow the sheave to be drawn in contact with the flange of the bushing. This gap should measure from 1/8” to 1/4”. Proper cap screw torque is 6 ft-lbs. (26.6 newtons), if greater tightening forces are applied, excess pressures will be created in the hub of the mounted sheave which may[...]

29 5. Assemble bushing and sheave as shown in figure “B.” When cap screws are loosely inserted, bushing remains fully expanded to provide a sliding fit on the shaft. 6. Insert key on the shaft, then slide sheave to desired position with cap screw heads to the outside. 7. Tighten cap screws progressively. There should remain a gap between the sh[...]

30 Basket (Tumbler) Alignment (Lateral) (Side to Side Adjustment) 1. Discontinue electrical power to the dryer. 2. Remove back guard. 3. Loosen rear pillow block bearing bolts (C). 4. Back off jam nuts on the two (2) lateral adjustment bolts (A) and (B). 5. Simultaneously loosen one (1) bolt and tighten the other. This will move the rear pillow blo[...]

31 IMPORTANT: Never strike the shaft directly with a hammer. 8. Remove basket (tumbler) from basket (tumbler) support. a. Remove the bolt in the center of the basket (tumbler) back wall. b. Loosen and remove the eight (8) sets of nuts and washers from basket (tumbler) tie rods. Remove the eight (8) tie rods. c. Replace either basket (tumbler) or ba[...]

32 To Replace Front Basket (Tumbler) Support Pillow Block Bearing 1. Discontinue electrical power to the dryer. 2. Remove back guard. 3. Follow steps 3 through 6 from “To Replace Rear Basket (Tumbler) Support Pillow Block Bearing.” 4. Remove the two (2) retaining rings from the basket (tumbler) shaft. 5. Remove the two (2) bolts holding the fro[...]

33 To Replace Rear Idler Shaft Pillow Block Bearing 1. Follow steps 1 through 3 from “To Replace Front Idler Shaft Pillow Block Bearing.” 2. Remove retaining rings on each side of forward idler shaft pillow block bearing. 3. Loosen the two (2) setscrews on each bearing collar. 4. Slide both bearings off the shaft. 5. Replace by reversing proced[...]

34 V-Belt Tension Adjustment (Motor to Idler) 1. Discontinue electrical power to the dryer. 2. Loosen the nuts on the four (4) studs holding the drive motor mount to the back of the dryer. 3. Loosen the jam nuts on the adjustment screw on the top of the motor mount. 4. Turn the adjustment screw to lower the motor mount (to tighten the belts) or rai[...]

35 To Replace Impellor Motor (Direct Drive) 1. Discontinue electrical power to the dryer. 2. Disconnect motor harness from motor. 3. Remove nuts and washers holding the motor mount to the rear of the dryer and pull motor mount away. 4. Remove the two (2) left handed jam nuts on the motor shaft retaining the impellor. Work the impellor free from the[...]

36 To Replace Impellor 1. Discontinue electrical power to the dryer. 2. Remove the left side panel to access the fan shaft mount assembly. 3. Remove the two (2) left handed jam nuts that hold the impellor to the fan shaft. 4. Remove the impellor, washers, and the key. 5. Replace the impellor, key, washers, left handed jam nuts, and the side panel. [...]

37 SECTION VI TROUBLESHOOTING The information provided will help isolate the most probable component(s) associated with the difficulty described. The experienced technician realizes, however, that a loose connection or broken or shorted wire may be at fault where electrical components are concerned – not necessarily the suspect component itself. [...]

38 D. Drive motor runs, burner is on, but basket (tumbler) will not turn... 1. Broken, damaged or loose V-belt. 2. Belts are contaminated (oil, grease, etc.). 3. Loose or broken pulley. E. Drive motor and blower motor start, computer display heat indicator is on, but there is no heat... 1. Lint coop automatic safety thermostat (225º F [107º C]) h[...]

39 4. Poor housekeeping. Dirty or clogged lint screen. 5. Extractors (washers) are not performing properly. 6. An exceptionally cold/humid or low barometric pressure atmosphere. 7. The supply gas may have a low heating value, check with local gas supplier. 8. Failed temperature sensor (temperature calibration is incorrect). 9. Failed microprocessor[...]

40 L. Display reads “dSFL,” dryer sensor circuit failure... 1. Check 1/8-amp fuse on computer. 2. Faulty microprocessor temperature sensor probe. 3. Open circuit in either one (1) of two (2) wires leading from the sensor probe to the computer. a. Connection at sensor bracket assembly connector. b. Connection at computer harness connector. 4. Fa[...]

41 SECTION VII ELECTRICAL TROUBLESHOOTING The information provided will help isolate the most probable components associated with the difficulty described. The experienced technician realizes, however, that a loose connection or broken or shorted wire may be at fault where electrical components are concerned, not necessarily the suspect component i[...]

42 NOTE: Once the Phase 5 OPL microprocessor controller (computer) detects a problem in the heat circuit, it updates every 30-seconds. If the problem was a loose connection in this circuit which corrected itself, the “dSFL” condition would automatically be cancelled. 3. “ SEFL ” - Indicates rotational sensor circuit failure meaning that the[...]

43 Phase 5 OPL Microprocessor Controller (Computer) Relay Output Light Emitting Diode (L.E.D.) Indicators There are a series of five (5) L.E.D. indicators (red lights) located at the lower back side area of the Phase 5 OPL microprocessor controller (computer). These are identified or labeled in the illustration as “HEAT,” “MTR” (motor), “[...]

44 1) If the motor is not operating and the “ MTR ” output indicator is on; then the problem (fault) is elsewhere (i.e., external to the Phase 5 OPL microprocessor controller [computer]). 4. “FWD” Output Light Emitting Diode (L.E.D.) Indicator (for Optional Reversing Models Only) a. If the dryer is started and the blower (impellor/fan) moto[...]

45 Illus. No. 3 - BLOWER MOTOR INDICATOR - This indicator dot is on whenever a cycle is in progress. In addition, when the anti-wrinkle program is active, this indicator will be on whenever the microprocessor controller (computer) is in the guard program. Illus. No. 4 - HEAT INDICATOR - This indicator dot is on whenever the microprocessor controlle[...]

46 L.E.D. DISPLA Y CODES A Slope Factor AUtO Automatic Mode ( Patent No. 4,827,627 ) ArEv Always Reverse b Heat Loss (offset) Factor bUZ Buzzer (tone) bUZ–tinE Buz Time º CEL Degree in Celsius CL Cool Down Cycle in Progress COOL-tinE Cool Down Time COOL-tEnP Cool Down Temperature CY A Preprogrammed Cycle A CY b Preprogrammed Cycle B CY C Preprog[...]

47 FILL No Cycle in Progress FLS Flash Display Active GdLY Anti-Wrinkle Delay Time G on–tInE Anti-Wrinkle On Time Grd Anti-Wrinkle Program Active Hot Overheating Condition MAnU Manual Mode MGrd Maximum Guard Time nbUZ No Buzzer (tone) nFLS No Flash Display nGrd Anti-Wrinkle Program Is Not Active nrEu No Reverse ProG Program Mode rEu Reverse SC Sp[...]

48 FAUL T CODES 1. door - Keyboard (touch pad) entry was made while the main door or lint drawer was open or fault in the circuit. 2. dSFL - Fault in microprocessor temperature sensor circuit. 3. SEFL - Fault in rotation of basket (tumbler). 4. Hot - Indicates that the dryer has experienced an overheating condition. To cancel the “Hot” default [...]

49 A. No display condition... 1. Check main fuses or circuit breaker. 2. Check blower motor overload, if tripped, reset. 3. Check fuse 1 or fuse 2 and if either are blown, replace. 4. Across terminal block nos. 6 and 8 you should be getting your 208V or 240V. If no voltage is present at 6 and 8, double check steps 1 and 2 and also check wires and t[...]

50 C. Drive motor works in forward mode but does not reverse, blower motor runs... 1. If computer dot (second one [1] from left) does not come on, check program to see if set for reverse. 2. If set for reverse, replace computer. 3. Check for voltage across the coil of the reversing contactor located in the rear panel box. The contactor according to[...]

51 E. “No Heat” drive and blower motors run, display reads normal (Gas Models)... 1. Check for voltage across terminal block nos. 3 and 7. If no voltage is present, problem is bad wire or broken terminal from terminal block no. 3 to MP harness connector pin 4. 2. If voltage is present, check for voltage across terminal block nos. 4 and 7. If no[...]

52 G. “Door” condition... NOTE: Make sure main door and lint drawer are closed. Also, if checking either switch, the plunger must be depressed. Check light emitting diode (L.E.D.) input light “door” on component side of the computer. If light is on, replace computer. 1. Check voltage (24 VAC) across terminal block nos. 5 and 7. If voltage i[...]

53 SECTION VIII TECHNICAL INFORMA TION The following section contains various technical information important to the service person in servicing and maintaining the dryer. A. MOT OR DA T A LABEL (HIGH AND LOW VOL T AGE) The motor plate is located on the side of the drive motor (refer to the illustration above ) and contains a graphical representati[...]

54 B. DA T A LABEL Contacting American Dryer Corporation When contacting ADC , certain information is required to insure proper service/parts information. This information is on the data label, located on the top left hand corner of the dryer, viewed from the rear (refer to the illustration above ). When contacting ADC , please have the model numbe[...]

55 C. USING A MANOMETER How To Use A Manometer 1. With dryer in nonoperating mode, remove plug on the gas valve pressure tap. 2. Attach plastic tubing to pressure tap. Fitting is supplied with manometer (refer to the illustration below ). 3. Attach manometer to the dryer using magnet. NOTE: Place manometer in a position so that readings can be take[...]

56 D. TOOL LIST Straight Head Screwdriver Phillips Head Screwdriver Sensor Pin and Socket Tool (P/N 122801) Pliers 1/4” Nut Driver 3/8” Open End Wrench 5/8” Open End Wrench 5/8” Deep Socket Wrench 3/8” Socket Wrench 1/2” Socket or Open End Wrench 1/4” Open End Wrench 5/16” Socket or Open End Wrench 1/2” Socket Wrench 7/16” Socke[...]

ADC 450418 1 - 06/16/02-20[...]