ADC ML-175 manual

ML-175 / ML-190 Ser vice Manual Phase 6 / Phase 7 Micr opr ocessor Contr ols 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 www .amdry .com ADC Part No. 450431 - 3[...]

2 American Dryer Corporation 450431 - 3 R etain T his Manual in a Saf e Place for Future Ref er ence This product embodies advanced concepts in engineering, design, and safety . If this product is properly maintained, it will provide many years of safe, ef ficient, and trouble free operation. Onl y qualified tec hnicians should ser vice this equipm[...]

450431 - 3 www .amdry .com 3 T a ble of Contents ________ List of Acronyms _____________________ DSI Direct S park Ignition HSI Hot Surface Ignition in wc Inches of Water Column L.E.D. Light Emitting Diode L . P . Liquid Propane OP L On-Premise Laundry (Non-Coin) OSHA Occupational Safety and Health Administration T .E.F .C. T ot ally Enclosed, Fan-[...]

4 American Dryer Corporation 450431 - 3 ▲ WARNING ! Dry only water-washed fabrics. Do not dry articles spotted or washed in dry cleaning solvents, a combustible detergent, or “all purpose” cleaners. Fire or explosion could result. Do not dry rags or articles coated with gasoline, kerosene, paint, or wax. Do not dry mop heads. Contamination by[...]

450431 - 3 www .amdry .com 5 Daily (Beginning) of each work shift. Clean lint from the drawer/screen. Inspect lint screen and replace if torn. W eekl y Clean lint accumulation from lint chamber , thermostat, and microprocessor temperature sensor (sensor bracket) area. ▲ WARNING ! T o avoid the hazard of electrical shock, discontinue electrical su[...]

6 American Dryer Corporation 450431 - 3 ! IMPORT ANT : Make-up air must be provided from a source free of dry cleaning fumes. Make-up air that is contaminated by dry cleaning fumes will result in irreparable damage to motors and other dryer components. Exhaust ductwork should be designed and installed by a competent technician. Improperly sized duc[...]

450431 - 3 www .amdry .com 7 Gas Bur ner Assembly Gas heated dryers are equipped with a gas burner assembly consisting of four burner tubes, gas valve, ignitor , flame- probe, sail switch, and hi-limit thermostat. The inlet piping enters through the rear of the dryer on the left-hand side (viewing from the front) and runs to the front of the dryer [...]

8 American Dryer Corporation 450431 - 3 Idler Shaft Assembly The idler shaft is located on the left side of the machine and is just above the blower motor . The idler shaf t assembly consists of one 1 1-inch (27.94 cm) drive wheel and two pillow block bearings. Drive Shaft The drive shaft is located on the right side and is above the drive motor . [...]

450431 - 3 www .amdry .com 9 Main Door Switch The main door switch is located near the main door hinge. When the main door opens, the switch will also open, preventing the dryer from operating. The main door switch is a safety device and should never be disabled. Bur ner Hi-Limit (Gas Models Onl y) A burner hi-limit thermost at is located on the bu[...]

10 American Dryer Corporation 450431 - 3 Lint Drawer The lint drawer 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. Lint Drawer Switch The lint drawer switch is located in the lint compartment and attached to the side of the [...]

450431 - 3 www .amdry .com 11 T o Replace Microprocessor T emperature Sensor Probe Discontinue electrical power to the dryer . Remove lint drawer . Remove six screws securing lint door and remove lint door . Remove microprocessor sensor bracket assembly from dryer . T o Replace Keyp ad Label Assembly Discontinue electrical power to the dryer . Unpl[...]

12 American Dryer Corporation 450431 - 3 T o Replace Gas V alve (Refer to burner illustration on the next page) Discontinue electrical power to the dryer . Close shutoff valve(s) in gas supply line. Disconnect gas valve wiring. NOTE: Identify location of each wire for correct reinstallation. Break union connection before gas valve. Loosen and remov[...]

450431 - 3 www .amdry .com 13 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. Remove the four screws which secure the top cap assembly . This assembly contains the regulator adjustment screw an[...]

14 American Dryer Corporation 450431 - 3 Discontinue electrical power to the dryer . Remove lint drawer . Remove two screws securing lint door and remove lint door . Locate sensor bracket assembly and the four Hex head screws securing bracket assembly to the tumbler wrapper . Disconnect sensor bracket harness connector and remove bracket assembly f[...]

450431 - 3 www .amdry .com 15 T o Inst all New Main Door Glass Remove main door assembly from dryer (follow main door removal procedure). Lay main door on flat surface with front of door face up. Remove the four #10-32 Acorn nuts. Remove glass and clean all old sealant off main door . This area must be completely cleaned for correct bonding. Apply [...]

16 American Dryer Corporation 450431 - 3 Tighten the two bolts under the drive shaft clockwise to raise the tumbler and counterclockwise to lower the tumbler . The bolts should be tightened in even increments in order to ensure that the shaft runs p arallel with the base of the dryer . IMPORT ANT : Side to side adjustment of the tumbler should be e[...]

450431 - 3 www .amdry .com 17 Remove the four bolts holding the two speed reducing shaft pillow block bearings in place and remove shaft assembly from dryer . T o remove front or rear pulley follow steps in “T o Replace Drive Shaft Pulleys”. Loosen and remove the two setscrews in the front/rear pillow block bearing. Clean the shaft and slide th[...]

18 American Dryer Corporation 450431 - 3 Bask et and Suppor t T o Replace T umbler and T umbler Support Discontinue electrical power to the dryer . Follow procedure for removal of main door assembly . Follow procedure for removal of front panel assembly . Remove bearing back guard. T o remove tumbler assembly and support, loosen the two setscrews o[...]

450431 - 3 www .amdry .com 19 Remove old motor pulley and bushing and place on new motor . Follow “T o Replace Motor Pulley”. Reverse these steps to replace drive motor . T o Replace Impellor Motor (Fan Shaft Drive – 50/60 Hz Gas and Steam Models) Discontinue electrical power to the dryer . Remove the lint drawer . Remove the lint door . Remo[...]

20 American Dryer Corporation 450431 - 3 T o Replace Lint Drawer Switch Disconnect electrical power to the dryer . Remove lint drawer and lint door . Disconnect both 4-pin connectors at the rear of the lint switch cover . Remove the one or two screws holding the lint switch cover on. Remove lint switch cover and disconnect the two terminals of the [...]

450431 - 3 www .amdry .com 21 Overload for impellor (fan) motor is tripping... Either an exceptionally low or high voltage supply . Motor bearing failure. Motor vents are blocked with lint. Failed motor . Failed overload. Out of balance impellor (fan). Insufficient make-up air . Burner hi-limit safety thermostat is tripping... Insufficient exhaust [...]

22 American Dryer Corporation 450431 - 3 bURNER CONTROL FAIL – This routine monitors the ignition control’s gas valve output response. If the valve output signal is not present from the ignition control within the valve time limits the Phase 6 microprocessor controller (computer) determines the ignition control has failed. If this occurs when t[...]

450431 - 3 www .amdry .com 23 L.E.D. Display Indicator Number 5 Air Jet Circuit Indicator – OPTIONAL This indicator dot is on at the end of each cycle for approximately 60-seconds. Phase 6 OPL Microprocessor Controller (Computer) Relay Output L.E.D. Indicators There are a series of five L.E.D. indicators (ORANGE LIGHTS) located at the backside of[...]

24 American Dryer Corporation 450431 - 3 If the dryer is active (running) and the lint door is opened the “LINT” L.E.D. indicator will go out and the display will read “LINT dOOR.” The dryer will stop until the lint drawer has been closed, at which time the L.E.D. display will read “PRESS ST ART .” At this time, to resume the drying cyc[...]

450431 - 3 www .amdry .com 25 Input / Output Board L.E.D. Indicators Inputs ESTOP – (RED L.E.D.): This L.E.D. will indicate the status of the E-STOP . If the E-ST OP has been pressed, then the L.E.D. is on. GAS_V – (RED L.E.D.): This L.E.D. will indicate the status of the gas valve. If the gas valve is open (ON), then the L.E.D. is on. BRHL –[...]

26 American Dryer Corporation 450431 - 3 Data Label When contacting ADC, cert ain information is required to ensure proper service/part s information. This information is on the data label, located on the top right corner of the dryer , viewed from the rear (refer to illustration). When contacting ADC, please have the model number and serial number[...]

450431 - 3 www .amdry .com 27 Notes ___________________________________________________________________________________________________________________________ _________________________________________________________________________________________________________________________________ ____________________________________________________________[...]

ADC Part No. 450431 3 - 06/17/08 - 0[...]