American Dryer Corp. AD-170 manual

American Dryer Corporation 88 Currant Road Fall River , MA 02720-4781 T elephone: (508) 678-9010 / Fax: (508) 678-9447 E-mail: techsupport@amdry .com 123096MFM/tf ADC Part No. 450400 AD-170 Service Manual Phase 5 Microprocessor Controls and Timer Controls[...]

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 properly licensed technicians should service this equipment. OBSERVE ALL SAFE[...]

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 T O ALLOW ACCESS FOR CLEANING, ADJUSTING, INST ALLA TION, or TESTING OF ANY EQUIPMENT per OSHA (Occupational Safety and Health Administration) ST ANDARDS. W ARNING The dr yer must never b[...]

DO NOT ST ORE OR USE GASOLINE OR OTHER FLAMMABLE V APOR AND LIQUIDS IN THE VICINITY OF THIS OR ANY OTHER APPLIANCE . FOR YOUR SAFETY DO NOT DR Y MOP HEADS IN THE DR YER. DO NOT USE DR YER IN THE PRESENCE OF DR Y CLEANING FUMES. IMPOR T ANT PLEASE OBSERV E AL L SAFETY PRECAUTIONS displayed on the equipment and/or specified in the installation/operat[...]

Table of Contents SECTION I Important Information ..................................................................................................................................... 3 A. Safety Precautions .......................................................................................................................................... 3 S[...]

SECTION V Servicing ........................................................................................................................................................... 13 A. Computer Controls ....................................................................................................................................... 14 B. Ignition[...]

3 SECTION I A. Safety Pr ecautions 1. DO NOT store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance. 2 . Purchaser/user should consult the local gas supplier for proper instructions to be followed in the event the user smells gas. The instructions should be posted in a prominent location. 3 . Drye[...]

4 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 duct work system. The frequency of cleaning can best be determined from experience at each location. Maximum operating efficiency is dependent upon proper air circulation. T[...]

5 6 MONTHS Inspect and remove lint accumulation in customer-furnished exhaust duct work system. Inspect exhaust back draft dampers to insure 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. W ARNING: THE ACCUMULA TI[...]

6 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 EDITION A. Enclosur e, Air Supply , and[...]

7 B. Electrical and Gas Requir ements 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 workmanship mu[...]

8 B. Contr ol Box Lifting the control door and opening the computer panel will reveal the control box. Inside the control box are ALL the electronic control components. Located on the back of the control box are the 30-position block, fuse block, and transformer . C. DSI Module (Gas Models Only) The (DSI) Direct Spark Ignition system consists of a [...]

9 E. Drive Motor The T .E.F .C. (totally enclosed, fan-cooled) drive motor is located approximately lower center of the dryer . It sits on an adjustable base so that the motor can be easily adjusted to the left or right, up or down, forward or back- ward. The drive motor is a 3/4 HP motor and operates on 208 to 408 volts, 3Ø, 50/60 Hz. F . Blower [...]

10 H. Idler Assembly (V iewing from the rear of the dryer) the idler assembly is located approximately on the lower center of the dryer . The idler assembly consists of two (2) idler pulleys, the small and large pulleys. The idler's main purpose is to reduce the speed and increase torque provided to the tumbler bearing. Also, at the idler asse[...]

11 L. Sail Switch (Gas Models ONL Y) The sail switch is located on the front of the burner box. A sail switch consists of a round damper plate on a lever arm which is in contact with an electric switch. When the air blower comes on, it draws air through the gas burner . This creates a negative pressure inside the burner box, and this negative press[...]

12 O. Lint Drawer The lint drawer is a pullout type and is located at the bottom of the dryer in the lint compartment. Simply grab the lint drawer handle, slide out the drawer , brush off the lint, and slide the drawer back in. The lint screen must be kept clean in order for the dryer to operate properly and ef ficiently . N. Automatic Reset Thermo[...]

13 SECTION V Servicing Introduction ALL electrical/mechanical service or repairs should be made with the electrical power to the dryer disconnected (power off). W ARNING: PERSONAL INJUR Y COULD RESUL T The information provided in this section should not be misconstrued as a device for use by an untrained person making repairs. Service work should b[...]

14 A. Computer Contr ols T o Replace Computer 1 . Disconnect 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 ribbon from the computer. 5. Remove the two hex nuts securing the comp[...]

15 4 . Peel paper backing of f new keyboard label assembly . 5 . Holding the new keyboard label assembly close to the panel, insert the keyboard ribbon through the rectangular slot in the control panel. Align label assembly into position by matching the red viewing window on the label to the rectangular cutout in the panel and gently press into pla[...]

16 B. Ignition Contr ols T o Remove Spark Ignitor (see above burner illustration) 1 . Discontinue power to dryer. 2 . Disconnect HV connector and flame probe connection from ignitor . 3 . Disassemble ignitor from burner by removing the two (2) self-tapping screws. 4 . Reverse procedure for installing new ignitor/flame-probe. NOTE: Before reestablis[...]

17 T o Replace Gas V alve (see burner illustration on page 16) 1 . Discontinue power to dryer . 2 . Close shut-of f valve(s) in gas supply line. 3 . Disconnect gas valve wiring. NOTE: Identify location of each wire for correct reinstallation. 4 . Break union connection before gas valve. 5 . Loosen and remove screws (4) securing pipe brackets to bur[...]

18 T o T est and Adjust Gas ( W ater Column) Pressure There are two (2) types of devices commonly used to measure water column pressure. They are spring/mechanical- type gauges and manometers. The spring/mechanical-type gauge is not recommended, because it is easily damaged and not always accurate. A manometer is simply a glass or transparent plast[...]

19 T o Convert from Natural Gas to 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 V alve" and follow steps 1 through 6. a. For models with 1" Robertshaw valve. 2 . Remove the four (4)[...]

20 T o Replace Burner T ubes 1 . Refer to "Replace Gas V alve" and follow steps 1 through 6. 2 . Remove four (4) screws securing manifold rest and remove rest. 3 . Remove the screws securing the front flanges of the burner tubes to the burner tube rest. 4 . Remove the screws securing the burner tube rest to the oven and remove this rest. [...]

21 T o Replace DSI Module 1 . Discontinue 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 power to dryer . C. Thermostats T o Replace Burner Hi-Limit Thermostat[...]

22 T o Replace Lint Compartment Hi-Heat Protector (225 Degree) Thermostat This thermostat is part of the "sensor bracket assembly" and is secured to the underside of the basket wrapper in the lint compartment. As a safety device, this thermostat will open (shut off) the heating unit circuit if an excessive temperature occurs. The dryer mo[...]

23 T o Replace Sail Switch 1 . Disconnect power to dryer . 2 . Remove the two (2) screws which hold sail switch box cover to sail switch box. 3 . Disconnect the two (2) wires from the switch. 4 . Disassemble sail switch from mounting bracket by removing the two (2) screws securing switch in place. 5 . Reverse this procedure for installing new sail [...]

24 IM PORT ANT : Under no circumstances should the door switch be disabled. T o Replace Main Door Assembly 1 . Remove screws holding main door to main door hinge pad. 2. Reverse this procedure for reinstalling new main door assembly . T o Install New Main Door Glass 1. Remove main door assembly from dryer (follow main door removal procedure). 2. La[...]

25 T o Replace Front Panel 1 . Discontinue power to dryer . 2 . Remove main door switch and bracket assembly . 3 . Follow procedure for removal of main door assembly . 4 . Open control (service) door . 5 . Remove lint drawer and open lint door by removing two (2) screws. 6 . Remove the twelve (12) Phillips head screws securing front panel to dryer [...]

26 F . Pulleys T o Replace T umbler Pulley 1 . Loosen V-belts. Rotate pulley and roll V-belts out of grooves. 2 . Remove cap screws from the bushings. 3 . Insert cap screws in tapped removal holes and tighten evenly until bushing becomes loose on shaft. See figure "A". 4 . Remove bushing, pulley , and key . 5 . Assemble bushing and sheave[...]

27 7 . T ighten cap screws progressively . There should remain a gap between the sheave hub and the flange of th e bushing. IM PORT ANT : T ighten 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., [...]

28 4 . Remove bushing, pulley , and key . 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 progres[...]

29 Basket Alignment (Lateral) (Side to Side Adjustment) 1 . Discontinue power to dryer . 2 . Remove backguard. 3 . Loosen rear pillow block bearing bolts (C). 4 . Back of f jam nuts on the two (2) lateral adjustment bolts (A) and (B). 5 . Simultaneously loosen one bolt and tighten the other . This will move the rear pillow block bearing. Center the[...]

30 IM PORT ANT : Never strike the shaft directly with a hammer. 8 . Remove basket from basket support. a. Remove the bolt in the center of the basket back wall. b. Loosen and remove the eight (8) sets of nuts and washers from basket tie rods. Remove the eight (8) tie rods. c. Replace either basket or basket support by reversing procedure. NOTE: Shi[...]

31 T o Replace Front Basket Support Pillow Block Bearing 1 . Discontinue power to dryer . 2 . Remove backguard. 3 . Follow steps 3 through 6 from "Replacement of Rear Basket Support Pillow Block Bearing". 4 . Remove the two (2) retaining rings from the tumbler shaft. 5 . Remove the two (2) bolts holding the front basket support pillow blo[...]

32 T o Replace Rear Idler Shaft Pillow Block Bearing 1 . Follow steps 1 through 3 from "T o Replace Front Idler Shaft Bearing". 2 . Remove retaining rings on each side of forward idler shaft pillow block bearing. 3 . Loosen the two (2) set screws on each bearing collar . 4 . Slide both bearings off the shaft. 5 . Replace by reversing proc[...]

33 V-Belt T ension Adjustment (Motor to Idler) 1 . Discontinue power to 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 . T urn the adjustment screw to lower the motor mount (to tighten the belts) or raise the [...]

34 6 . Align motor pulley with idler pulley and align motor shaft with idler shaft and tighten bolts. 7 . Replace belts and adjust belt tension. 8 . Retighten bolts. 9 . Reestablish power to dryer . T o Replace Impellor Motor (Fan Shaft Drive - Steam Models 50 & 60 Hz and 50 Hz Gas Models ONL Y) 1 . Discontinue power to dryer. 2 . Remove drive [...]

35 K. Impellor 1 . Discontinue 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 and the washers and the key . 5 . Replace the impellor , key , washers, left handed jam nuts, and the side panel. 6 .[...]

36 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. ELECTRICAL P A R TS SHOULD[...]

37 3. Dryer will not start, but computer display indicators are on. A. Failed contactors B. Failed arc suppressor (A.S.) board C. Failed microprocessor (computer) D. Failed motors 4. Drive motor runs, burner is on, but basket will not turn. A. Broken, damaged or loose V-belt B. Belts are contaminated (oil, grease, etc.) C. Loose or broken pulley 5.[...]

38 6. Dryer operates, probe sparks, but gas does not flow . A. Dryer gas shut-of f valve is closed B. Failed gas valve (open coil in valve) C. Loose wiring connection from DSI module to gas valve (Check voltage at gas valve) D. Failed DSI module 7. Dryer operates, probe sparks but there is no ignition even though gas is evident. A. Gas pressure is [...]

39 9. Thermal overload for drive motor is tripping. A. Either an exceptionally low or high voltage supply B. Motor bearing failure C. Bearing failure in drive system D. Motor vents are blocked with lint E. Failed motor F . Insufficient make-up air 10. Overload for impellor (fan) motor is tripping. A. Either an exceptionally low or high voltage supp[...]

40 12. Display reads "dSFL". Dryer Sensor Circuit Failure. A. Check 1/8 amp fuse on computer B. Faulty microprocessor temperature sensor probe C. Open circuit in either one of two (2) wires leading from the sensor probe to the computer 1) Connection at sensor bracket assembly connector 2) Connection at computer harness connector D. Faulty[...]

41 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 itself. ELECTRICAL P A R TS SHOULD AL [...]

42 A. Phase 5 OPL System Diagnostics All major circuits, including door , microprocessor temperature sensor , heat and motor circuits are monitored. The Phase 5 OPL microprocessor controller will inform the user , via the LED display , of certain failure codes, along with indicators both in the LED display and the outputs of each relay , (and door [...]

43 1 . Blower Motor Circuit Indicator - indicator dot is on whenever a cycle is in progress. 2 . Heat Controller Indicator - indicator dot is on whenever the Phase 5 OPL microprocessor controller is calling for the heating circuit to be active (on). 3 . Reversing Indicator - indicator dot is on when the drive basket (tumbler) motor is operating in [...]

44 2. " MTR " Output LED Indicator - If the dryer is started and the motor is not operating, yet both the microprocessor controller display motor indicator dot and the "dOOr" input LED indicator are on, but the motor output LED indicator is off, then the fault is in the Phase 5 OPL microprocessor controller itself. If the motor [...]

45 5. " DOOR " LED Indicator - The indicator should be on all the time (even if the dryer is not returning) unless the main door or lint drawer is open or there is a problem (open circuit in the main door or lint drawer circuit). NOTE: If the dryer is started (LED display indicator dots are on) and there are no outputs (heat and/or motor [...]

46 C. LED Display/Codes The LED display informs the user of cycle status and program verification and displays important diagnostic and fault codes. 1. Display Operating Status a. Cycle in Progress - While the dryer is operating, the display will read which cycle is in progress. For example, in the drying cycle (mode), the display will read "d[...]

47 Illus. No 5 - REVERSE INDICA TOR - This indicator is functional for models with the reversing action option only . This indicator will be on when the basket is in the reverse (counterclockwise direction. Illus. No. 6 - FOR W ARD INDICA TOR - This indicator dot is functional only for models with the reversing action option only . This indicator w[...]

48 donE Drying or Cooling Cycles Complete or Dryer is in Anti-W rinkle Program door Door Circuit is Open or Fault in Door Switch Circuit dr Drying Cycle in Progress drYLEuL Dryness Level (percentage of extraction) drY-tEnP Drying T emperature dSFL Dryer Sensor Circuit Failure F Fabric (temperature) º FA r Degree in Fahrenheit FILL No Cycle in P[...]

49 SEFL Rotational Sensor Circuit Failure SEn Rotational Sensor Selected SPIn-tInE Spin T ime Sr Select Reverse StoptInE Stop T ime tEnP-tInE T emperature Display Time tinE Time Fault Codes 1. door - Keyboard entry was made while the main door or lint drawer was open or fault in the circuit 2. dSFL - Fault in microprocessor temperature sensor ci[...]

50 2 . Information entered is sent to the microcontroller via the keyboard. 3 . The input information is sorted/processed and executed by the microcomputer chip. 4 . The microcomputer output signal activates the contactors and DSI module which control machine functions. NOTE: When contacting ADC with electrical questions, please have on hand the co[...]

51 1. No Display Condition A. Check main fuses or circuit breaker B. Check blower motor overload...If tripped, reset C. Check fuse 1 or fuse 2 and if either are blown, replace D. Across terminal block nos. 6 and 8 you should be getting your 208 V or 240 V . If no voltage is present at 6 and 8, double check steps A and B and also check wires and ter[...]

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

53 4. Blower motor does not operate, drive motor runs. A. Check for voltage across terminals A1 and A2 of the impellor contactor . This is the single contactor in the rear control box. If voltage is present check for voltage across the blow motor . If there is voltage at the blower motor replace the motor . If there is no voltage at the blower moto[...]

54 6. "No Heat" drive and blower motors run, display reads normal (Steam Models). A. Check for voltage across terminal block nos 3 and 7. If no voltage is present, problem is bad wire(s) or termination(s) between terminal block 3 to MP harness connector pin 4. B. If voltage is present, check for voltage across terminal block nos. 4 and 7.[...]

55 B. If voltage is not evident at both points (nos. 1 & 2 of the 15 pin modular connector located in computer box area) with respect to ground. If no voltage at either two points...Problem is faulty 24 V XFMR (P/N 141403) If voltage at one point, trace the voltage through the lint drawer switch and the main door switch and their connectors (J3[...]

56 SECTION VIII T echnical Information The following section contains various technical information important to the service person in servicing and maintaining the dryer . A. Motor Plate (High and Low V oltage) The motor plate is located on the side of the drive motor (see illustration) and contains a graphical representation of the motor wiring f[...]

57 B. Data Label Contacting American Dryer Corporation (ADC) When contacting ADC , certain information is required to insure proper service/parts information. This information is on the data label, located on the top right corner of the dryer , viewed from the rear (see illustration). When contacting ADC , please have the model number and serial nu[...]

58 HOW T O USE A MANOMETER 1 . With dryer in non-operating mode, remove plug on the gas valve pressure tap. 2 . Attach plastic tubing to pressure tap. Fitting is supplied with manometer (see illustration). 3 . Attach manometer to dryer using magnet. NOTE: Place manometer in a position so that readings can be taken at eye level. C. Using a Manometer[...]

59 D. AD-170SE T ool List Straight Head Screwdriver Phillips Head Screwdriver Sensor Pin and Socket T ool (P/N 122801) Pliers 1/4" Nut Driver 3/8" Open End W rench 5/8" Open End W rench 5/8" Deep Socket W rench 3/8" Socket W rench 1/2" Socket or Open End W rench 1/4" Open End W rench 5/16" Socket or Open End [...]

ADC 450400 1 - 02/27/98-50[...]