American Dryer Corp. AD-75 manual

AD-25, 30, 50, 75 and 758 Ser vice Manual Phase 7.2 Non-Coin American Dryer Corporation 88 Currant Road Fall River MA 02720-4781 USA T elephone: (508) 678-9000 / Fax: (508) 678-9447 e-mail: techsupport@amdry .com www .amdry .com ADC Part No. 450268[...]

IMPORT ANT NO TE T O PURCHASER Information must be obtained from your local gas supplier on the instructions to be followed if the user smells gas. These instructions must be posted in a prominent location near the dryer . FOR Y OUR SAFETY Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other [...]

T able of Contents SECTION I IMPORT ANT INFORMA TION ........................... 4 A. Safety Precautions ............................................................ 4 SECTION II ROUTINE MAINTENANCE ............................... 5 A. Cleaning ............................................................................. 5 B. Adjustments ..........[...]

4 American Dryer Corp. 450268-1 SECTION I IMPORT ANT INFORMA TION A. SAFETY PRECAUTIONS 1. DO NOT store or use gasoline or other flammable vapors and liquids in the vicinity of this or any appliance. 2. Purchaser and user should consult the local gas supplier for proper instructions to be followed in the event the user smells gas. The instructions [...]

450268-1 www .amdry .com 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[...]

6 American Dryer Corp. 450268-1 6 MONTHS Inspect and remove lint accumulation in the customer furnished exhaust ductwork system. Inspect exhaust draft dampers to ensure they are not binding. Inspect and remove ALL lint accumulation from in and around control box area including coin acceptors. Clean lint accumulation from around tumbler wrapper area[...]

450268-1 www .amdry .com 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 S tandards: ANSI Z223.1-LA TEST EDITION (National Fuel Gas Code) or ANSI/NFP A NO. 70-LA T[...]

8 American Dryer Corp. 450268-1 B. ELECTRICAL AND GAS REQUIREMENTS 1. Electrical 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 st ate regulations or codes. In the absence of such codes, A[...]

450268-1 www .amdry .com 9 C. OPERA TIONAL SER VICE CHECK PROCEDURE After performing any service or maintenance function, an operational check should be performed to ensure that ALL components are performing properly . 1. Make a complete operational check of ALL the operating controls to assure that the timing is correct, temperature selection swit[...]

10 American Dryer Corp. 450268-1 SECTION IV DESCRIPTION OF PAR TS A. CONTROL PANEL (MICROPROCESSOR) Lifting the control door will reveal the control p anel assembly . Opening the control panel will allow access to the major components, which include the computer board, and keypad. The keypad inputs to the computer what temperature and program has b[...]

450268-1 www .amdry .com 11 D. LINT DRA WER SWITCH The lint drawer switch is located in the lint comp artment and attached to the side of the lint drawer track. The lint drawer switch ensures that the dryer will operate only when the lint drawer is completely close. This is a safety device and should never be disabled. E. LINT DRA WER The lint draw[...]

12 American Dryer Corp. 450268-1 G . TUMBLER BEARING AND PULLEY ARRANGEMENT The tumbler bearing and the pulley arrangement is located (viewing from the rear of the dryer) approximately at the upper center of the dryer . The arrangement consists of a pulley , bearing platform, and bearing, which serve to adjust, drive, and support the tumbler . H . [...]

450268-1 www .amdry .com 13 J. TEMPERA TURE SENSOR (COMPUTER CONTROLS) The temperature sensor used, is a transducer that converts heat into microamp s that the computer board then uses to calculate the temperature. K. GAS BURNER Gas dryers are equipped with a gas burner located behind the control door . The gas burner assembly consists of the burne[...]

14 American Dryer Corp. 450268-1 M. COMPRESSED AIR REQUIREMENTS This dryer requires an external supply of air (2.5 cfm @ 80 psi [0.07 cmm @ 5.51 bar]) on the steam models, the air is necessary to operate the steam damper system. On both steam, as well as the gas model, the air is necessary for the blower air jet operation to clean lint from the imp[...]

450268-1 www .amdry .com 15 P . MOT OR CONT ACT OR (1Ø MOT OR) This motor contactor used on a single-phase (1ø) dryer , is located in the rear of the dryer , in the electrical panel box. It s purpose is to transfer the higher voltage to the motor , when the contactor coil voltage has been achieved. Q. NON-REVERSING CONT ACT OR (3Ø MOT OR) The no[...]

16 American Dryer Corp. 450268-1 S. HI-LIMIT THERMOST A T (GAS AND ELECTRIC MODELS ONL Y) The hi-limit thermostat is another safety device that we use on gas and electric models. The hi-limit is located in the burner or oven area. The hi-limit switch cuts of f the heat, if the temperature exceeds 290° for electric models or 330º for gas models. T[...]

450268-1 www .amdry .com 17 SECTION V SER VICING IMPORT ANT: YOU MUST DISCONNECT AND LOCKOUT THE ELECTRIC SUPPL Y AND THE GAS SUPPL Y BEFORE ANY COVERS OR GUARDS ARE REMOVED FROM THE MACHINE TO ALLOW ACCESS FOR CLEANING , ADJUSTING , INST ALLA TION, OR TESTING OF ANY EQUIPMENT PER OCCUP A TIONAL SAFETY AND HEAL TH ADMINISTRA TION (OSHA) ST ANDARDS.[...]

18 American Dryer Corp. 450268-1 TO REPLACE COMPUTER 1. Discontinue power to the dryer . 2. Disconnect the J3, J4, J5, J6, and J8 harnesses from the rear of the computer by squeezing the top locking tab and pulling the connector straight back. 3. Disconnect the green ground wire from the computer . 4. Disconnect the keypad ribbon from the computer [...]

450268-1 www .amdry .com 19 TO REPLACE COMPUTER TEMPERA TURE SENSOR PROBE 1. Discontinue power to the dryer . 2. Remove microprocessor sensor bracket assembly from the dryer . a. Disconnect sensor bracket harness connector . b. Loosen the two (2) Phillips head screws securing the bracket assembly to the dryer and remove the bracket from the dryer .[...]

20 American Dryer Corp. 450268-1 B. BURNER CONTROLS (GAS) This illustration is typical of ALL gas burners, but they are not ALL exactly alike. Y our particular model may have some differences. TO REPLACE SP ARK IGNITOR 1. Discontinue power to the dryer . 2. Disconnect high voltage connector and flame-probe connection from ignitor . 3. Disassemble i[...]

450268-1 www .amdry .com 21 TO REPLACE GAS V AL VE 1. Discontinue power to the dryer . 2. Close shutoff valve in the gas supply line. 3. Disconnect the gas valve wiring. 4. Break union connection before gas valve. 5 . Loosen and remove two (2) screws securing pipe bracket to the burner . 6. Remove gas valve/manifold assembly from the dryer . 7. Rem[...]

22 American Dryer Corp. 450268-1 NOTE: Manometers are available from the factory by ordering ADC Part No. 122804. 1. T o test gas water column (W .C.) pressure. a. Connect water column test gauge connection to gas valve pressure t ap (1/8” N.P .T). This pressure tap is located on the outlet (downstream) side of the valve. b. S tart the dryer . Wi[...]

450268-1 www .amdry .com 23 TO CONVERT FROM NA TURAL T O LIQUID PROP ANE (L.P .) GAS 1. Disconnect electrical power to the dryer . 2. Close ALL shutof f valves in dryer gas supply line. 3. Disconnect gas valve wiring. NOTE: Identify location of each wire for correct reinstallation. 4. Break union connection (nut) between union shutoff and gas valve[...]

24 American Dryer Corp. 450268-1 TO REPLACE BURNER TUBES 1. Discontinue power to the dryer . 2. Close shutoff valve in the gas supply line. 3. Disconnect the gas valve wiring. 4. Break union connection before gas valve. 5 . Loosen and remove two (2) screws securing the gas valve bracket to the burner . 6. Remove gas valve/manifold assembly from the[...]

450268-1 www .amdry .com 25 C. STEAM CONTROLS INST ALLA TION Piping must be inst alled in accordance with good commercial steam system practice. Refer to the illustration below for a typical pipe arrangement. STEAM DAMPER SYSTEM MAN0582[...]

26 American Dryer Corp. 450268-1 TO REPLACE STEAM COIL (DAMPER SYSTEM) 1. Discontinue power to the dryer . 2. Remove the four (4) lock washers and hex nuts securing the hinges to the steam coil. 3. Remove hinges from the steam coil housing (these will be used on the new assembly). 4. Remove six (6) washers and hex nuts securing steam coil to the dr[...]

450268-1 www .amdry .com 27 TO REPLACE THE NEEDLE V AL VE 1. Discontinue power to the dryer . 2. Discontinue the air to the dryer . 3. Remove the 1/8” brass close nipple from the needle valve. 4. Remove the 1/8” M.P .T . connector from the needle valve. 5. Remove the needle valve. 6. Reverse procedure to install the new needle valve. TO REPLACE[...]

28 American Dryer Corp. 450268-1 D. ELECTRICAL OVEN CONTROLS TO REPLACE ELECTRICAL ELEMENTS 1. Discontinue power to the dryer . 2. Remove cover by removing two (2) screws and lifting the cover . 3. Remove the screws and wiring holding the element in place at the rear of the oven. 4. From the front of the oven, slide out element. 5 . Reverse procedu[...]

450268-1 www .amdry .com 29 E. THERMOST A TS AND TEMPERA TURE SENSOR TO REPLACE HI-LIMIT THERMOST A T (330º GAS, 290º ELECTRIC) This thermostat is an import ant safety device serving as an added protection against failure of the air sail switch to open in the event of motor failure or reduced airflow condition. IMPORT ANT : UNDER NO CIRCUMST ANCE[...]

30 American Dryer Corp. 450268-1 2. T emperature Sensor (Microprocessor Models) a. Discontinue power to the dryer . b. Open and remove the lint door . c. Disconnect sensor bracket harness connector . d. Loosen the two (2) Phillips head screws securing bracket assembly to dryer and remove by sliding bracket towards the rear of the dryer . e. Disasse[...]

450268-1 www .amdry .com 31 TO ADJUST SAIL SWITCH 1. Operate the installed dryer normally to verify that the heat system is fully operational. 2. Open the main dryer door . 3. Manually depress the door switch actuator . 4. While continuing to depress the door switch actuator , and with the door open, start the dryer . 5. If the heat system is not a[...]

32 American Dryer Corp. 450268-1 TO REPLACE MAIN DOOR ASSEMBL Y 1. Remove screws holding main door to main door hinge. 2. Reverse this procedure for reinstalling the new main door assembly . TO INST ALL NEW MAIN DOOR GLASS 1. Remove main door assembly from the dryer (follow main door removal procedure). 2. Lay main door on a flat surface with front[...]

450268-1 www .amdry .com 33 5. Remove the screws securing the front panel to the dryer . 6. Gently remove the top right hand corner of the front panel assembly from the dryer . 7. Disconnect the main door switch harness at the connector . IMPORT ANT : When removing front panel assembly , be careful not to damage main door switch wires disconnected [...]

34 American Dryer Corp. 450268-1 H. TUMBLER AND BEARING ASSEMBL Y (Remove back guard to access assembly) TO REPLACE TUMBLER PULLEY (NON-REVERSING) 1. Loosen V -belts, then rotate pulley and roll V -belts out of the grooves. 2. Loosen two (2) setscrews on the pulley and pull the pulley of f the shaft. 3. Reverse procedure for installing the new tumb[...]

450268-1 www .amdry .com 35 TO REPLACE THE REAR TUMBLER BEARING 1. Remove the tumbler pulley (follow tumbler pulley removal procedure). 2. Remove the four (4) bolts securing the bearing platform to the back of the dryer . 3. Loosen Allen screw securing bearing collar to the shaft. 4. Slide bearing collar off the tumbler support. 5. Pull bearing pla[...]

36 American Dryer Corp. 450268-1 I. IDLER AND BEARING ASSEMBL Y (Remove back guard to access assembly) TO REPLACE IDLER PULLEY 1. Remove the back guard. 2. Loosen V -belts, then rotate pulley and roll V -belts out of the grooves. 3. Loosen the two (2) setscrews on the pulley and pull of f the shaft. 4. Reverse procedure for installing the new idler[...]

450268-1 www .amdry .com 37 J. DRIVE PULLEY (Remove back guard to access assembly) 1. Remove the back guard. 2. Loosen V -belts then rotate pulley and roll V -belts out of the grooves. 3. Loosen setscrews and pull motor pulley out. NOTE: If rust has developed on the shaft, use an emery cloth to polish the shaft. 4. Reverse procedure for installing [...]

38 American Dryer Corp. 450268-1 TUMBLER ALIGNMENT (LA TERAL) 1. Discontinue power to the dryer . 2. Remove the back guard. 3. Loosen the two (2) hex head bolts, (one [1] turn is enough), that holds the pillow block bearing to the bearing box. 4. Back off the two (2) jam nut s on the side adjustment bolt s. Now , rotate the tumbler from the front o[...]

450268-1 www .amdry .com 39 TO REPLACE THE TUMBLER AND/OR TUMBLER SUPPORT 1. Discontinue power to the dryer . 2. Remove the tumbler pulley . 3. Remove the front panel assembly . a. Open the control (service) door . b. Open the lint door . c. Remove the screws securing the front panel to the dryer . d. Gently remove the top right hand corner of the [...]

40 American Dryer Corp. 450268-1 L. V -BEL TS (Refer to illustration in Sections I, J, and K) V -belts should have proper tension. If too loose, they will slip, if too tight excessive wear on the bearing will result. If the pulleys are not properly aligned, excessive belt wear will result. Proper belt tension will allow 1/2” displacement under no[...]

450268-1 www .amdry .com 41 TO REPLACE V -BEL TS 1. Loosen tension on V -belts, so that they can easily be rolled off pulleys. 2. Replace V -belts. 3. Retighten V -belts and adjust tension and alignment per previous instructions. M. MOT OR TO REPLACE MOT OR (NON-REVERSING) 1. Discontinue power to the dryer . 2. Remove the drive belt. 3. Disconnect [...]

42 American Dryer Corp. 450268-1 O. LINT DRA WER SCREEN TO REPLACE LINT SCREEN 1. Gently slide the lint drawer outward. 2. Remove the lint bag and inspect for rips or tears. Replace with new lint bag, if damaged. 3. Reverse procedure for installing the new lint bag. 4. Close the lint drawer .[...]

450268-1 www .amdry .com 43 SECTION VI TROUBLESHOOTING The information provided will help isolate the most probable components associated with the dif ficulty 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 sus[...]

44 American Dryer Corp. 450268-1 PHASE 7 NON-COIN SYSTEM DIAGNOSTICS IMPORT 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 T O ALLOW ACCESS FOR CLEANING , ADJUSTING , INST ALLA TION, OR TESTING OF ANY EQUIPMENT PER OCCUP A TIONAL SAFETY AND[...]

450268-1 www .amdry .com 45 BURNER PURGE FAUL T – The gas valve signal is present during the prepurge time. MODEL ERROR, ENTER CORRECT MODEL – The wrong model was selected for the dryer . EE PROM FAUL T ### – Error in memory location. The ### indicates the location of the fault. B. INPUT/OUTPUT BOARD LIGHT EMITTING DIODE (L.E.D.) INDICA T ORS[...]

46 American Dryer Corp. 450268-1 2. Output s (Green L.E.D.) 9. AUX – This is for a spare output to be programmed. 10. STEAM – This light emitting diode (L.E.D.) will indicate the status of the steam injection output. If the request to turn on the steam injection is made, then the L.E.D. is ON. 1 1. _HEA T – This L.E.D. will indicate the statu[...]

450268-1 www .amdry .com 47 A . The display reads “Exhaust High Limit Fault”. (Refer to p age 51) The temperature in the tumbler is above 220º F (104º C) or follow Steps #1 through #4 . 1. Check for voltage (24 V AC) at the computer on the J5 connector from pin 1 to ground. If no volt age is present, either you have a poor connection at the J[...]

48 American Dryer Corp. 450268-1 E. The display reads “Sail Switch Closed Fault”. (Refer to page 52) 1. Prior to start up, the sail switch is in the closed position. 2. Check the sail switch and readjust accordingly . 3. Replace sail switch, if necessary . F . The display reads “Burner Ignition Control Fault”. (Refer to p age 52) 1. Check f[...]

450268-1 www .amdry .com 49 H. Drive motor reverses, but does not go forward, blower motor runs. The display reads “Rot ation Fault”.* (Refer to p age 57) 1. Possible causes: a. Belt is broke, loose, or slipping. b. Lint accumulation on the rot ational sensor . c. Rotational sensor magnet is missing or broke. Reset power , then, restart the dry[...]

50 American Dryer Corp. 450268-1 J. No display condition or display reads “Low V oltage Fault”.* (Refer to p age 54) 1. Check for line voltage (120, 208, 240, etc.) in the rear of the dryer at the distribution block. If no voltage is present, the problem may be a faulty or tripped breaker . If voltage is present, check for line voltage (120, 20[...]

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58 American Dryer Corp. 450268-1 SECTION VII DA T A LABEL INFORMA TION A. DA T A LABEL When contacting ADC , certain information is required to ensure proper service/p arts information from ADC . This information is on the data label af fixed to the left side panel/wall area behind the control door . When contacting ADC , please have the model numb[...]

450268-1 www .amdry .com 59 B. USING A MANOMETER HOW TO USE A MANOMETER 1. With dryer in nonoperating mode, remove plug on the gas valve pressure tap. 2. Install 1/8” N.P .T . fitting supplied with the manometer . 3. Attach plastic tubing to pressure tap fitting. 4. Attach manometer to dryer using magnet. NOTE: Place manometer in a position so th[...]

60 American Dryer Corp. 450268-1 C. KEYP AD LA YOUT 1. Dot Matrix Display 2. A-F Preprogrammed Cycles 3. S top/Pause Button 4. S tart Button 5. Increment Button 6. Decrement Button 7. One time Auto (Dryness level) and Manual (T imed) Cycle NOTE: Fuse 1 is for computer power rated at 1/2-Amp. If fuse blows, it is a computer board fault. Fuse 2 is fo[...]

450268-1 www .amdry .com 61 D. SENSOR ACTIV A TED FIRE EXTINGUISHING (S.A.F .E.) SYSTEM THEORY OF OPERA TION While the dryer is in an idle state or 20-seconds af ter the heat turns of f, the Phase 7 control monitors the S.A.F .E. system probe located in the top of the tumbler chamber and records the minimum temperature. If the minimum recorded S.A.[...]

62 American Dryer Corp. 450268-1 E. ST A TIC PRESSURE The pressure of the air in sheet metal duct s is of great importance for safe and efficient operation of the dryer . The air pressures, as small as they are, have a large influence upon the performance of the dryer . There are three (3) pressures present within a duct. The velocity pressure, whi[...]

450268-1 www .amdry .com 63 F . USING A MAGNEHELIC When measuring such small air pressures, the U-tube is often not accurate enough. Such small dif ferences in pressure are most often measured by an inclined tube manometer or a Magnehelic pressure gage as shown in Illustration #2 . ILLUS. #2 For convenience and accuracy , an instrument known as a P[...]

64 American Dryer Corp. 450268-1 T o obt ain the most accurate static pressure readings of a dryer , the following guidelines should be conformed to. The reading should be taken in a straight section of duct, a minimum of ten (10) times the diameter of the duct (i.e. 10-inches [25.4 cm] diameter duct, a straight section 100-inches [254 cm] in lengt[...]

450268-1 www .amdry .com 65 Notes _____________________________________________________________________________________________ ___________________________________________________________________________________________________ ___________________________________________________________________________________________________ ______________________[...]

ADC Part No. 450268 1 - 10/26/05 - 0[...]