American Dryer Corp. MDG75V manual

MDG75V (1.000 CFM/Phase 5 and D.T.) Installation Manual 112602JEV/mcronan Part No. 113160 RET AIN THESE INSTRUCTIONS IN A SAFE PLACE FOR FUTURE REFERENCE 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 death. — Do not store or use[...]

Retain This Manual In A Safe Place For Futur e Refer ence This product embodies 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. OBSER VE ALL SAFETY PRECAUTIONS displayed [...]

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 CHILDREN SHOULD NOT B[...]

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 RESUL T . IMPOR T ANT PLEASE OBSER VE ALL SAFETY PRECAUTIONS displayed on the equipment and/or specified in the installation manual included with the dryer . W ARNING DR YER MUST NEVER BE OPERA TED WITHOUT THE [...]

Table of Contents SECTION I IMPOR T ANT INFORMA TION ............................................................................... 3 A. Receiving and Handling ............................................................................................................... 3 B . Safety Precautions ....................................................[...]

SECTION VI TROUBLESHOOTING ........................................................................................... 3 7 SECTION VII DA T A LABEL INFORMA TION ............................................................................. 4 3 A. Data Label .............................................................................................[...]

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 packaging, and wooden skid should be visually inspected for shipping damage. If any damage [...]

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 INJUR Y OR FIRE COULD [...]

5 W ARNING: DO NOT dry mop heads. Contamination by wax or flammable solvents will create a fire hazard. W ARNING: 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 e[...]

6 SECTION II SPECIFICA TIONS A. SPECIFICA TIONS * ALL MDG75V reversing dryers are supplied with two (2) 3-phase (3ø) motors standard: a 1/2 HP (0.37 kw) blower motor and a 1/2 HP (0.37 kw) drive motor . * * Size of piping to dryer varies with installation conditions. Contact factory for assistance. NOTE: Manufacturer reserves the right to make cha[...]

7 NOTE: Manufacturer reserves the right to make changes in specifications at any time without notice or obligation. Specifications MDG75V[...]

8 B. COMPONENT IDENTIFICA TION 1. Dryer Front V iew Illus. No. Description 1 Controls 2 Control (top access) Door Assembly 3 Main Door Assembly 4 Lint Compartment Area (lint screen located behind lint door or left sidewall) 5 Data Label and Installation Label (affixed to the upper left side panel area behind the top control [access] door)[...]

9 2. Dryer Rear V iew Illus. No. Description 1 Heating Unit 2 Electric Service Relay Box 3 Basket (tumbler) Bearing Mount Assembly 4 Idler Bearing Mount Assembly 5 Blower Motor Assembly (for reversing models only) 6 Leveling Legs (rear) 7 Basket (drive) Motor Assembly 8 Dryer Exhaust[...]

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 National Standards: ANSI Z223.1- LA TEST EDITION (National Fuel Gas Code) or ANSI/NFP A NO. 70-LA TEST EDITION (National Elec[...]

11 CAUTION: This dryer produces combustible lint and must be exhausted to the outdoors. Every six (6) months, inspect the exhaust ducting and remove any lint build up. 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 [...]

12 C. DR YER ENCLOSURE REQUIREMENTS Bulkheads and partitions should be made of noncombustible materials and must be located a minimum of 12-inches (30.48 cm), 18-inches (45.72 cm) or more is recommended for ease of installation, maintenance, and service above the dryer ’ s outer top, except along the front of the dryer which may be partially clos[...]

13 D. FRESH AIR SUPPL Y REQUIREMENTS When the dryer is operating, it draws in room air , heats it, passes this air through the basket (tumbler), and exhausts it out of the building. Therefore, the room air must be continually replenished from the outdoors. If the make-up air is inadequate, drying time and drying efficiency will be adversely affecte[...]

14 E. EXHAUST REQUIREMENTS 1. General Exhaust Ductwork Information Exhaust ductwork should be designed and installed by a qualified professional. Improperly sized ductwork 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) switches, [...]

15 IMPOR T ANT : Exhaust back pressure measured by a manometer in the exhaust duct must be no less than 0 and must not exceed 0.3 inches (0.75 mb) of water column (W .C.). NOTE: When the exhaust ductwork passes through a wall, ceiling, or roof made of combustible materials, the opening must be 2-inches (5.08 cm) larger than the duct (all the way ar[...]

16 IMPOR T ANT : For extended ductwork runs, the cross section area of the ductwork can only be increased to an extent. When the ductwork approaches the maximum limits noted in this manual, a professional heating, venting, and air conditioning (HV AC) firm should be consulted for proper venting information. ALL ductwork should be smooth inside with[...]

17 3. Multiple (common) Dryer V enting IMPOR T ANT : For extended ductwork runs, the cross section area of the ductwork can only be increased to an extent. When the ductwork approaches the maximum limits noted in this manual, a professional heating, venting, and air conditioning (HV AC) firm should be consulted for proper venting information. ALL d[...]

18 IMPOR T ANT VENTING REMINDERS 1. Ductwork size and installation should be done by a qualified professional. 2. The dryer must be exhausted to the outdoors. 3. Ductwork should be routed as short as possible to the outdoors with as few elbows as possible. 4. A void 90° turns, use 30° or 45° turns instead. 5. For single dryer venting, the size o[...]

19 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 to local and state regulations or codes. In the absence of such codes, ALL electrical connections, materials,[...]

20 NOTE: Component failure due to improper voltage application will VOID THE W ARRANTY . 3. Grounding A ground (earth) connection must be provided and installed in accordance with state and local codes. In the absence of these codes, grounding must conform to applicable requirements of the National Electrical Code ANSI/NFP A NO. 70-LA TEST EDITION,[...]

21 If local codes permit, power to the dryer can be made by the use of a flexible U.L. listed power cord or pigtail (wire size must conform to rating of dryer), or the dryer can be hard wired directly to the service breaker panel. In both cases, a strain relief must be installed where the wiring enters the dryer . S I N G LE- P H AS E ( 1 Ø ) ELE [...]

22 5. 3-Phase (3ø) W iring Connections/Hookup (for non-reversing models only) The only electrical input connections to the dryer are the 3-phase (3ø) power leads (L1, L2, L3, and sometimes Neutral) and ground. Single-phase (1ø) power for the control circuit is done internally to the dryer . No single-phase (1ø) input connection is required on a[...]

23 6. 3-Phase (3ø) W iring Connections/Hookup (for reversing models only) The electrical connections on ALL 3-phase (3ø) gas dryers are made into the rear service box located at the upper left area of the dryer . Electrical connections for electrically heated dryers are made in the electric oven area located at the upper rear area of the dryer . [...]

24 IMPOR T ANT : Figures shown are for non-reversing models ONL Y . For reversing models, contact the factory . IMPOR T ANT : The dryer must be connected to the electric supply shown on the data label that is affixed to the upper left side panel area behind the top control (access) door . In the case of 208 V AC or 240 V AC, the supply voltage must[...]

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 to local and state regulations or codes. In the absence of such codes, ALL plumbing connections, materials, and workmanship must conform to the applicable requireme[...]

26 2. T echnical Gas Data a . Gas Specifications b. Gas Connections Inlet connection ------------------- 3/4” N.P .T . Inlet supply size ------------------- 3/4” N.P .T . (minimum) Btu/hr input (per dryer) ---------- 175,000 (44,100 kcal/hr) 1) Natural Gas Regulation is controlled by the dryer ’ s gas valve’ s internal regulator . Incoming [...]

27 3. Piping Connections ALL components/materials must conform to National Fuel Gas Code Specifications ANSI Z223.1-LA TEST EDITION, or in Canada, CAN/CGA-B149.1-M91 (Natural Gas) or CAN/CGA-B149.2-M91 (Liquid Propane [L.P .] Gas) or LA TEST EDITION (for General Installation and Gas Plumbing), as well as local codes and ordinances and must be done [...]

28 Consistent gas pressure is essential at ALL gas connections. It is recommended that a 3/4-inch (19.05 mm) pipe gas loop be installed in the supply line servicing a bank of dryers. An in-line pressure regulator must be installed in the gas supply line (header) if the (natural) gas pressure exceeds 12.0 inches (29.9 mb) of water column (W .C.) pre[...]

29 H. 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 to the upper lef[...]

30 I. 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. Ref[...]

31 NOTE: T o check for proper sail switch operation, open the main door and while holding main door switch plunger in, start dryer . Dryer should start but heat circuit should not be activated (on). If the heat system is activated, the sail switch is improperly adjusted and must be adjusted by bending the actuator arm of the sail switch toward the [...]

32 J. P REOPERA TIONAL INSTRUCTIONS OPL MODELS 1. T o start the dryer: a . Microprocessor controller (computer) dryers 1) The light emitting diode (L.E.D.) display will read “FILL.” 2) Press the “E” on the keyboard (touch pad). 3) The L.E.D. display will quickly show “Ld30,” “LC04,” and “F180.” The dryer will start, and the L.E.[...]

33 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 Maytag dealer from whom the equipment was purchased. If the dealer cannot be contacted or is unknown, contact the Maytag Co. for a dealer in your area. NOTE: W[...]

34 SECTION V 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 [...]

35 90 DA Y S Inspect and remove lint accumulation in customer furnished exhaust ductwork system and from dryer ’ s internal exhaust ducting. W ARNING: THE ACCUMULA TION OF LINT IN THE EXHAUST DUCTWORK CAN CREA TE A POTENTIAL FIRE HAZARD. W ARNING: DO NOT OBSTRUCT THE FLOW OF COMBUSTION AND VENTILA TION AIR. W ARNING: INSPECT AND REMOVE ANY LINT A[...]

36 D. LINT DRA WER REMOV AL T o remove the lint drawer from the dryer pull drawer out approximately halfway . Rotate/move lint drawer stop hinge (refer to the illustration below ) downward and pull drawer out. IMPOR T ANT : After replacing the lint drawer back into the dryer , be sure to rotate/move hinge back to the upward stop position.[...]

37 SECTION VI TROUBLESHOOTING IMPOR T ANT : YOU MUST DISCONTINUE AND LOCKOUT THE ELECTRIC SUPPL Y AND THE GAS SUPPL Y BEFORE ANY COVERS OR GUARDS ARE REMOVED FROM THE DRYER TO ALLOW ACCESS FOR CLEANING , ADJUSTING , INST ALLA TION, OR TESTING OF ANY EQUIPMENT PER OSHA (Occupational Safety and Health Administration) ST ANDARDS. The information provi[...]

38 3. Failed drive motor . 4. Failed microprocessor controller (computer). C. Drive motor (reversing) operates in one (1) dir ection only , stops and restarts in same dir ection... 1. Failed drive motor contactor (relay). 2. Failed arc suppressor (A.S.) board (for reversing models only). 3. Failed microprocessor controller (computer). D . Drive mot[...]

39 1. Fault in main door switch circuit. 2. Blown fuse (2-Amp very fast acting fuse [if applicable]). 3. Failed arc suppressor (A.S.) board (for reversing models only). 4. Failed microprocessor controller (computer). 5. Failed 24 V AC transformer . H. Both drive motor and blower motor run a few minutes and then stop...microprocessor controller (com[...]

40 L . Microprocessor controller (computer) will only accept certain keyboard (touch pad) entries... 1. Failed keyboard (touch pad) label assembly . 2. Failed microprocessor controller (computer). M . Microprocessor controller (computer) locks up and light emitting diode (L.E.D.) display reads erroneous message(s) or only partial segments... 1. T r[...]

41 b. Sail switch damper is not closing or is fluttering... 1) Lint screen is dirty . 2) Restriction in exhaust ductwork. 2. Fault in burner hi-limit circuit or tripped manual reset hi-limit. 3. Fault in lint chamber sensor bracket or tripped manual reset hi-heat protector thermostat. 4. Failed Direct Spark Ignition (DSI) module. 5. Failed DSI igni[...]

42 S. Dryer is making scraping noise at basket (tumbler) area... 1. Check for object caught in basket (tumbler)/wrapper area. 2. Basket (tumbler) is out of proper alignment... a . Check both vertical and lateral alignment. b. Check gap between front panel and basket (tumbler) front...setscrews may have come loose and basket (tumbler) walked forward[...]

43 When contacting the Maytag dealer or the Maytag Co. , certain information is required to insure proper service/ parts information. This information is on the data label affixed to the upper left side panel area behind the top control (access) door . When contacting Maytag , please have the model number and serial number available. SECTION VII DA[...]

44 THE DA T A LABEL 1. MODEL NUMBER The model number is an Maytag Company 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 to gather information on your particular dryer . 3. MANUF ACTURING CODE NUMBER The manufacturing code number is a number issued by t[...]

45 SECTION VIII PROCEDURE FOR FUNCTIONAL CHECK OF REPLACEMENT COMPONENTS 1. Microprocessor Controller (computer) Board a . Upon completing installation of the replacement microprocessor controller (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 microproc[...]

46 e . Open main door . The dryer must stop and ALL indicator lights on the back side of the microprocessor controller (computer) board must go out. (Refer to the illustration on the previous page.) f . T ry to restart the dryer with the main door open. g. The microprocessor controller (computer) board’ s light emitting diode (L.E.D.) display mus[...]

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