American Dryer Corp. MD-170 manual

020800JEV/abe ADC Part No. 113024 MD-170 Installation/Operator's Manual For replacement parts, contact the distributor from which the dryer was purchased or contact: Maytag Co. 403 W est Fourth St North Newton, Iowa 50208 (515) 787-7000 W ARNING: For your safety the information in this manual must be followed to minimize the risk of fire or ex[...]

Retain This Manual In A Safe Place For Futur e Reference D AT E O F P URCHAS E M ODE L NO. DIS TRI BUT O RS NAM E Seri a l Nu mber(s ) MD-170 IMPOR T ANT NOTE TO 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 locati[...]

IMPOR T 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 OSHA (Occupational Safety and Health Administration) ST AN- DARDS. CHILDREN SHOULD NOT BE ALLOWED T O PLA Y ON OR NEA[...]

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

Table of Contents SECTION I IMPOR T ANT INFORMA TION ............................................................................... 3 A. RECEIVING and HANDLING ................................................................................................... 3 B. SAFETY PRECAUTIONS .................................................................[...]

SECTION VII TROUBLESHOOTING ........................................................................................... 4 3 SECTION VIII REVERSING TIMER SPIN / DWELL ADJUSTMENTS .................................. 6 0 SECTION IX DA T A LABEL LOCA TION/INFORMA TION ...................................................... 6 1 SECTION X PROCEDURE FOR FUN[...]

3 SECTION I IMPOR T ANT INFORMA TION A. RECEIVING and HANDLING The dryer is shipped in a protective stretch wrap cover with protective cardboard corners and top cover (or optional box) as a means of preventing damage in transit. Upon delivery , the dryer and/or packaging, and wooden skid should be visually inspected for shipping damage. If any dama[...]

4 B. SAFETY PRECAUTIONS 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 guards, outer tops, or service panels removed. PERSONAL INJURY or FIRE COULD [...]

5 7. A program should be established for the inspection and cleaning of lint in the heating unit area, exhaust duct work, and inside the dryer . The frequency of inspection and cleaning can best be determined from experience at each location. W ARNING : The collection of lint in the burner area and exhaust duct work can create a potential fire haza[...]

6 SECTION II SPECIFICA TIONS / COMPONENT IDENTIFICA TION A. SPECIFICA TIONS (GAS and STEAM) Gas Steam IMPOR T ANT : Gas dryers and steam dryers must be provided with a clean, dry , regulated 80 PSI ±10 PSI (552 kPa ± 0.69 kPa) air supply . NOTE : The manufacturer reserves the right to make changes in specifications at any time, without notice or [...]

7 NOTE : Operating height of steam dryer is 101-inches (256.54 centimeters). NOTE : The manufacturer reserves the right to make changes in specifications at any time, without notice or obligation. Specifications MDG-170 (Gas) MDS-170 (Steam)[...]

8 B. COMPONENT IDENTIFICA TION 1. Dryer Front V iew Illus. No. Description 1 Microprocessor Control/Keyboard (T ouchpad) Panel Assembly (Controls) 2 Control (top access) Door Assembly 3 Main Door Assembly 4 Lint Door Assembly 5 Lint Drawer 6 W ire Diagram (located Behind Control Door) 7 T op Console (Module) Assembly 8 Data Label and Installation L[...]

9 2. Dryer Rear V iew Illus. No. Description 1 Basket (Drive) Motor Assembly 2 Blower Motor Mount Assembly 3 Idler Bearing Mount Assembly 4 T umbler Bearing Mount Assembly 5 * Electric Service Relay Box 6 Heating Unit 7 Data Label and Installation Label 8 1/8" Compressed Air Supply Inlet (Behind Gusset) 9 Side Access Opening 1 0 Front Access O[...]

10 SECTION III INST ALLA TION PROCEDURES 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 NA TIONAL S T ANDARDS: ANSI.Z223.1-LA TEST EDITION (National Fuel Gas Code) and/or ANSI/NFP A NO. 70-LA TEST EDITION (Nationa[...]

11 B. UNP ACKING/SETTING UP Remove protective shipping material (i.e., plastic wrap, and/or optional shipping box) from dryer . IMPOR T ANT : Dryer must be transported and handled in an upright position at all times. The dryer can be moved to its final location while still attached to the skid or with the skid removed. T o unskid the dryer , locate[...]

12 5) Lift the console (module) off of the dryer base. IMPOR T ANT : The dryer must be transported and handled in an upright position at all times. 2 ) Remove the eight (8) set of nuts and washers (B) holding the console (module) to base. 3 ) Disconnect the white plug connector (C) located on the top of the rear electric service/ relay box (provide[...]

13 NOTE : When fire sprinkler systems are located above the dryers, a minimum of 18-inches above the dryer console (module) is required. Dryers may be positioned side wall to side wall; however , 1 or 2-inches is suggested between dryers (or wall) for ease of installation and maintenance. Allowances must be made for the opening and closing of the c[...]

14 IMPOR T ANT : Make-up air must be provided from a source free of dry cleaning solvent fumes. Make-up air that is contaminated by dry cleaning solvent fumes will result in irreparable damage to motors and other dryer components. NOTE : Component failure due to dry cleaning solvent fumes will VOID THE W ARRANTY . D. FRESH AIR SUPPL Y When the drye[...]

15 E. EXHAUST REQUIREMENTS 1. General Exhaust Duct W ork Information Exhaust duct work should be designed and installed by a qualified professional. Improperly sized duct work will create excessive back pressure which results in slow drying, increased use of energy , overheating of the dryer , and shutdown of the burner by the airflow (sail) switch[...]

16 a . Outside Duct W ork Protection 1) T o protect the outside end of horizontal duct work from the weather, a 90° elbow bent downward should be installed where the exhaust exits the building. If the exhaust duct work travels vertically up through the roof, it should be protected from the weather by using a 180° turn to point the opening downwar[...]

17 2. Single Dryer V enting Where possible, it is suggested to provide a separate exhaust duct for each dryer . The exhaust duct should be laid out in such a way that the duct work travels as directly as possible to the outdoors with as few turns as possible. It is suggested that the use of 90° turns in ducting be avoided; use 30° and/or 45° ang[...]

18 IMPOR T ANT : For extended duct work runs, the cross section area of the duct can only be increased to an extent. Maximum proportional duct work runs cannot exceed twenty (20) feet more than the original limitations of twenty (20) feet with two (2) elbows. When the duct work approaches the maximum limits as noted in this manual, a professional h[...]

19 The main duct may be any shape or cross-sectional area, so long as the minimum cross section area is provided. The illustrations on page 20 show the minimum cross section area for multiple dryer round or square venting. These figures must be increased 10 square inches when rectangular main ducting is used, and the ratio of duct width to depth sh[...]

20[...]

21 F . ELECTRICAL INFORMA TION 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 with local and state regulations or codes. In the absence of such codes, ALL electrical connections, material[...]

22 2. Electrical Service Specifications IMPOR T ANT : The dryer must be connected to the electric supply shown on the data label that is affixed to the back of the dryer , at the upper right hand corner . In the case of 208 V AC or 230/240 V AC, the supply voltage must match the electric service specifications of the data label exactly . W ARNING :[...]

23 3. Electrical Connections NOTE : A wiring diagram is included with each dryer and is affixed to the rear upper right guard/panel of the dryer . The only electrical input connections to the dryer are the 3-phase (3ø) power leads (L1, L2, and L3), GROUND, and in the case of four (4) wire service, the neutral. These electrical connections are made[...]

24 4. Grounding Grounding (earth) connections must be provided and installed in accordance with state and local codes. In the absence of the codes, grounding must conform to applicable requirements of the National Electrical Code ANSI/NFP A NO.70 LA TEST EDITION. The ground connection may be to a proven earth ground at the location service panel. N[...]

25 G . GAS INFORMA TION It is your responsibility to have ALL plumbing connections made by a qualified professional to assure that the gas plumbing installation is adequate and conforms with local and state regulations or codes. In the absence of such codes, ALL plumbing connections, materials, and workmanship must conform to the applicable require[...]

26 2. T echnical Gas Data a . Gas Specifications b. Gas Connections: Inlet connection ---- 1-inch N.P .T . Inlet supply size ----- 1-inch N.P .T . (minimum) Btu/hr input (per dryer) ----- 550,000 (138,600 kcal/hr) 1) Natural Gas Regulation is controlled by the dryer's gas valve's internal regulator . Incoming supply pressure must be consi[...]

27 3. Piping/Connections ALL components/materials must conform to National Fuel Gas Code Specifications. It is important that gas pressure regulators meet applicable pressure requirements and that gas meters be rated for the total amount of ALL the appliance Btu's being supplied. The dryer is provided with a 1-1/2-inch N.P .T . inlet pipe conn[...]

28 IMPOR T ANT : The dryer and its individual shut-off valve must be disconnected from the gas supply system during any pressure testing of that system at test pressures in excess of 1/2 psig (3.5 kPa). NOTE : The dryer must be isolated from the gas supply piping system by closing its individual manual shut-off valve during any pressure testing of [...]

29 H. STEAM INFORMA TION It is your responsibility to have ALL steam plumbing connections made by a qualified professional to assure that the installation is adequate and conforms with local and state regulations or codes. IMPOR T ANT : Failure to comply with the requirements stipulated in this manual can result in component failure which will VOID[...]

30 STEAM DAMPER SYSTEM a . The pressure of the condensate in the steam supply will cause water hammer and subsequent heat exchanger (steam coil) failure. The steam supply connection into the main supply line must be made within a minimum 12-inch riser . This will prevent any condensate from draining towards the dryer . b. The steam supply piping to[...]

31 4. Steam Damper Connections The MDS-170 steam dryer is manufactured with a pneumatic (piston) damper system which requires an external supply of compressed air . The air connection is made to the steam damper solenoid valve which is located at the rear of the top console. a . Air Requirements b. Air Connection Air connection to system -- 1/8-inc[...]

32 6. S team Damper Piston (Flow Control) Operation Adjustment Although the damper operation was tested and adjusted prior to shipping at 80 psi, steam damper operation must be checked before the dryer is put into operation. Refer to the illustration above for correct steam damper operation. If damper air adjustment is necessary , locate flow contr[...]

33 I. PREP ARA TION FOR OPERA TION/ST AR T -UP The following items should be checked before attempting to operate the dryer; 1. Read ALL " CAUTION ," " W ARNING ," and "DIRECTION " labels attached to the dryer . 2. Check incoming supply voltage to be sure that it is the same as indicated on the dryer data label affixed[...]

34 J. PREOPERA TIONAL TESTS ALL dryers are thoroughly tested and inspected before leaving the factory . However , a preoperational test should be performed before the dryer is publicly used. It is possible that adjustments have changed in transit or due to marginal location (installation) conditions. 1. T urn on electric power to the dryer . 2. Mak[...]

35 4. Check to insure that the tumbler (basket) starts in the clockwise (CW) direction. Additionally , check the direction of the blower motor impellor/fan (squirrel cage) to insure that it is operating in the correct direction (blower motor pulley should be turning in the counterclockwise [CCW] direction). If it is, the phasing is correct. If the [...]

36 7. A reversing tumbler (basket) dryer should never be operated with less than a 60 lb. (27 kg) load (dry weight). The size of the load will affect the coast-down and dwell (stop) times. The tumbler (basket) must come to a complete stop before starting in opposite direction. For microprocessor controller (computer) models, with the automatic (mod[...]

37 L. COMPRESSED AIR REQUIREMENTS The model MD-170 dryer requires an external supply of compressed air of 2.5 cfm at 80 PSI (552 kPa). For Steam Models, compressed air is necessary for the air operated steam damper . On both the Steam Model as well as the Gas Model, compressed air is necessary/required for blower air jet operation...to clean lint f[...]

38 SECTION IV SER VICE/P AR TS INFORMA TION A. SER VICE 1. Service must be performed by a qualified trained technician, service agency , or gas supplier . If service is required, contact the distributor from whom the Maytag Company equipment was purchased. If the distributor cannot be contacted or is unknown, contact the Maytag Customer Service Dep[...]

39 SECTION V W ARRANTY INFORMA TION A. RETURNING W ARRANTY CARD(S) 1. Before any dryer leaves the manufacturer , a warranty card is placed on the back side of the main door glass. These warranty cards are intended to serve the customer where we record the individual installation date and warranty information to better serve you should you file a wa[...]

40 SECTION VI ROUTINE MAINTENANCE A. CLEANING A program 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 up[...]

41 90 DA YS Re-grease the two (2) 1-3/8-inch bearings that support the impellor/fan shaft. Use Shell Alvania #3 grease or its equivalent. Impellor/fan shaft bearings should be lubricated. Check to make sure that the set screws on the impellor/fan shaft bearings are tight. Remove lint from around tumbler (basket), drive motors, and surrounding areas[...]

42 B. ADJUSTMENTS 7 Days After Inst allation and Every 6 Months Thereafter Inspect bolts, nuts, screws (bearing set screws), non-permanent gas connections (unions, shut-off valves, orifices, and grounding connections). Motor and drive belts should be examined. Cracked or seriously frayed belts should be replaced. T ighten loose V -belts when necess[...]

43 SECTION VII TROUBLESHOOTING IMPOR T ANT : YOU MUST DISCONNECT and LOCKOUT THE ELECTRIC SUPPL Y a nd 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 ANDAR[...]

44 continued from page 43 3. Failed drive motor . 4. Failed microprocessor controller (computer). C . Drive motor (r eversing) operates in one direction only ...stops and restarts in same direction... 1. Failed drive motor contactor (relay). 2. Failed arc suppressor (A.S.) board. 3. Failed microprocessor controller (computer). D . Drive motor opera[...]

45 G . Both drive motor and blower (impellor/fan) motor are not operating ( do not start)...microprocessor controller (computer) motor indicator dots and relay output L.E.D. indicator dots are on... 1. Failed arc suppressor (A.S.) board. 2. Failed contactors (both blower and drive). 3. Failed motors (both blower and drive). H. Both drive motor and [...]

46 K . Microprocessor controller (computer) display reads "door" and microprocessor controller (computer) "door" L.E.D. indicator is off... 1. Fault (open circuit) in main door/lint drawer switch circuit ... a . Lint drawer is not closed ALL the way . b. Lint drawer switch out of proper adjustment. c . Failed lint drawer switch.[...]

47 Q . Dryer stops during a cycle, microprocessor controller (computer) buzzer (tone) sounds for 5-seconds, and then the L.E.D. (light emitting diode) display returns to FILL"... 1. Loose connection somewhere in the main power circuit to the microprocessor controller (computer). 2. Failed arc suppressor (A.S.) board. R . Microprocessor control[...]

48 continued from page 47 a ) Failed impellor (fan/blower) "squirrel cage." b) Loose or failed impellor (fan/blower) assembly drive belts. c ) Fault in impellor (fan/blower) motor circuit...refer to Item E and Item F on page 44 in this section. 2. T ripped burner manual reset hi-limit circuit. 3. T ripped lint chamber sensor bracket baske[...]

49 continued from page 48 c . Ignitor does not spark and Direct Spark Ignition (DSI) module "LOCKS-OUT" ("red" L.E.D. [light emitting diode] indicator light stays on) ... 1) Fault in high voltage (HV) wire... a ) Break in wire. b) Loose connection. c ) Failed ignitor probe assembly . d) Failed Direct Spark Ignition (DSI) module.[...]

50 continued from page 49 6. Inadequate air flow ... a . Impellor (blower/fan) "squirrel cage" failure. b. Loose impellor (blower/fan) "squirrel cage" drive V -belts. 7. Gas Models a . Low and/or inconsistent gas pressure; Natural Gas pressure must be 3.5 inches of water column (8.7 millibars). Liquid Propane (L.P .) pressure mu[...]

51 continued from page 50 f . Dirty steam coil ... 1) Fins clogged with lint. g. Steam damper system not functioning properly ... 1) Damper is sticking closed. 2) Leak in pneumatic (air) system. 9. Extractors (washers) not performing properly . 10 . Failed microprocessor ( computer controlled models Only ) ...temperature calibration is inaccurate. [...]

52 Z . Dryer or scraping noise at tumbler (basket) area... 1. Check for object caught in tumbler (basket)/wrapper area. 2. T umbler (basket) is out of proper alignment ... a . Check both vertical alignment and lateral alignment. b. Check gap between front panel and tumbler (basket)...set screws may have come loose, and tumbler (basket) walked forwa[...]

53 continued from page 52 c . Failed lint drawer switch. d. Failed main door switch. e . Broken connection/wire in main door or lint drawer switch circuit. 4. Failed push to start relay . 5. Failed 24 V AC step down transformer (for models 380 volts or higher Only). B. Drive motor is not operating ( does not start)... 1. Failed drive motor contacto[...]

54 continued from page 53 c . Failed motor . d. Failed blower (impellor/fan) drive shaft bearings. NOTE : V -belts to tight or bearings not lubricated often enough. G . Both drive motor and blower (impellor /fan) motor is not operating ( do not start) and indicator light is on... 1. Fault in L1 or L2 termination(s) between terminal block and contac[...]

55 STEAM MODELS 1. T ripped lint chamber sensor bracket tumbler (basket) manual reset hi-limit switch circuit. 2. Failed temperature selection switch or circuit. 3. Failed temperature cycle thermostat (try another selection). 4. Failed heat timer . I. No heat...voltage is confirmed at heating unit (i.e., Gas Model, DSI module, or S team Model dampe[...]

56 STEAM MODELS 1. No (external) compressed air (80 PSI [552 kPa) required) to steam damper solenoid. 2. Flow control valve is not adjusted correctly ... a . T oo much restriction. 3. Failed steam damper pneumatic (air) solenoid. 4. Damper stuck in "closed" position ... a . Check for obstruction. 5. Leak in the pneumatic (air) system. 6. [...]

57 continued from page 56 b. Poor air/gas mixture (too much gas or not enough air) at burner ...yellow or poor flame pattern ... 1) Not enough make-up air . 2) Restriction in exhaust. 3) Gas pressure too high. 4) Impellor (blower/fan) "squirrel cage" rotating in the wrong direction. 5) Burner orifice size (D.M.S.) too large for applicatio[...]

58 continued from page 58 1 0 . Failed microprocessor controller (computer controlled models Only) ...temperature calibration is inaccurate. 1 1. Failed microprocessor temperature sensor (computer controlled models Only) ...calibration is inaccurate. 12 . Exceptionally cold/humid or low barometric pressure atmosphere. 13 . Microprocessor temperatur[...]

59 N . Excessive noise and/or vibration... 1. Dryer is not leveled properly . 2. Impellor (fan/blower) "squirrel cage" out of balance ... a . Excessive lint buildup impellor (fan/blower) "squirrel cage." NOTE : Check to insure that the air jet is functioning. b. Failed impellor (fan/blower) "squirrel cage." 3. Loose tu[...]

60 SECTION VIII REVERSING TIMER SPIN/DWELL ADJUSTMENTS T imer models have an electric reversing timer in the electric service box which is located in the upper left rear area of the dryer . Both the Dwell (stop) T ime and basket (tumbler) Spin T ime are adjustable by mode selection switches located on the electronic timer (as noted in the illustrat[...]

61 SECTION IX DA T A LABEL LOCA TION / INFORMA TION Data Label When contacting Maytag Company , certain information is required to insure proper service/parts information from Maytag. This information is on the data label that is located in the left inside front panel (as shown in the illustration above). When contacting the Maytag Company please h[...]

62 THE DA T A LABEL 1. MODEL DRYER The model number is a manufacturer's number which describes the size of the dryer and the type of heat (gas, electric, or steam). 2. SERIAL NUMBER The serial number allows Maytag Company to gather information on your particular dryer . 3. MANUF ACTURING CODE NUMBER The manufacturing code number is a number is[...]

63 SECTION X PROCEDURE FOR FUNCTIONAL CHECK OF REPLACEMENT COMPONENTS 1. Microprocessor (computer) Board a. Upon completing installation of the replacement microprocessor (computer) board, reestablish power to the dryer . b. Start the drying cycle. c . V erify that the motor(s) and the heat indicator dots, in the microprocessor (computer) L.E.D.dis[...]

64 e . Open main door . The dryer must stop and ALL output indicator lights on the back side of the micro- processor (computer) board must go out . f . T ry to restart the dryer with the main door open. g. The microprocessor (computer) board's L.E.D. display must read " DOOR ." h. Close the main door and restart the dryer . i. Functi[...]

65 2. For models manufactured with Johnson Controls DSI (Direct Spark Ignition) Module (G760) Theory Of Operation; Start the drying cycle. When the gas burner ignites within the chosen trial for ignition time (6-seconds), the flame sensor detects gas burner flame and signals the Direct Spark Ignition (DSI) module to keep the gas valve open...as lon[...]

66 I M P O R T A N T MANUAL RESET HI-LIMIT INSTRUCTIONS FOR DUAL TIMER OR PHASE 5 WITHOUT HEA T F AUL T (GAS MODELS ONL Y) This dryer was manufactured with a manual reset burner hi-limit and tumbler/lint chamber hi-limit thermostat. If either manual reset burner hi-limit thermostat is open prior to the start of the drying cycle, or during the cycle[...]

67 I M P O R T A N T MANUAL RESET HI-LIMIT INSTRUCTIONS FOR DUAL TIMER OR PHASE 5 WITHOUT HEA T F AUL T (STEAM MODELS ONL Y) This dryer was manufactured with a manual reset tumbler/lint chamber hi-limit thermostat. If the manual reset thermostat is open prior to the start of the drying cycle, or during the cycle, the dryer will not recognize the op[...]

Part No. 113024 1 - 02/16/00-25 2 - 02/25/00-250[...]