American Dryer Corp. ML-78II manual

For replacement parts, contact the reseller from which the dryer was purchased or American Dryer Corporation 88 Currant Road Fall River MA 02720-4781 Telephone: (508) 678-9000 / Fax: (508) 678-9447 e-mail: techsupport@amdry.com www.amdry.com WARNING: For your safety the information in this manual must be followed to minimize the risk of fire or exp[...]

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 qualified technicians should service this equipment. OBSERVE ALL SAFETY PRECA[...]

IMPORTANT YOU MUST DISCONNECT AND LOCKOUT THE ELECTRIC SUPPLY AND THE GAS SUPPLY BEFORE ANY COVERS OR GUARDS ARE REMOVED FROM THE MACHINE TO ALLOW ACCESS FOR CLEANIN G , ADJUSTIN G , INSTALLATION, OR TESTING OF ANY EQUIPMENT PER OSHA (Occupational Safety and Health Administration) STANDARDS. CHILDREN SHOULD NOT BE ALLOWED TO PLAY ON OR NEAR THE DRY[...]

WARNING The dryer must never be operated with any of the back guards, outer tops, or service panels removed. PERSONAL INJURY OR FIRE COULD RESULT. IMPORTANT PLEASE OBSERVE ALL SAFETY PRECAUTIONS displayed on the equipment and/or specified in the installation manual included with the dryer. Dryers must not be installed or stored in an area where it [...]

Table of Contents SECTION I IMPORTANT INFORMATION .......................................................................... 3 A. Receiving and Handling ............................................................................................................... 3 B. Safety Precautions .............................................................[...]

SECTION VI ROUTINE MAINTENANCE ............................................................................ 35 A. Cleaning ................................................................................................................................... 35 B. Adjustments .............................................................................[...]

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 damag[...]

4 B. SAFETY PRECAUTIONS WARNING: 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. WARNING: The dryer must never be operated with any of the back guards, outer tops, or service panels removed. PERSONAL INJURY OR FIRE COULD RESUL[...]

5 7. A program should be established for the inspection and cleaning of lint in the burner area, exhaust ductwork, and area around the back of the dryer. The frequency of inspection and cleaning can best be determined from experience at each location. WARNING: The collection of lint in the burner area and exhaust ductwork can create a potential fir[...]

6 Gas SECTION II SPECIFICA TIONS/COMPONENT IDENTIFICA TION A. SPECIFICA TIONS * For non-reversing models only. ** A minimum of 3/4” pipe must be supplied to the gas inlet for each dryer. NOTE: ADC reserves the right to make changes in specifications at any time without notice or obligation. BASKET (TUMBLER) DIAMETER 44-1/2” 113 cm BASKET (TUMBL[...]

7 Specifications MLG-78II (Gas) NOTE: ADC reserves the right to make changes in specifications at any time without notice or obligation.[...]

8 B. COMPONENT IDENTIFICA TION 1. Dryer Front View Illus. No. Description 1 Controls 2 Control (top access) Door Assembly 3 Main Door Assembly 4 Lint Compartment Area (lint screen located behind door) 5 Wire Diagram 6 Data Label and Installation Label (located in the left side panel/wall area behind the control door)[...]

9 2. Dryer Rear View Illus. No. Description 1 Heating Unit 2 Outer Top Area 3* Electric Service Relay Box 4 Basket (tumbler) Bearing Mount Assembly 5 Idler Bearing Mount Assembly 6 Basket (tumbler) (drive) Motor Assembly (for reversing models only) 7 Blower Motor Assembly 8 Dryer Exhaust * Electrical service connections are made in this box.[...]

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- LATEST EDITION (National Fuel Gas Code) or ANSI/NFPA NO. 70-LATEST EDITION (National Electri[...]

11 10. The dryer must be installed with provisions for adequate combustion and make-up air supply. CAUTION: This dryer produces combustible lint and must be exhausted to the outdoors. Every 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 opt[...]

12 C. DR YER ENCLOSURE REQUIREMENTS Bulkheads and partitions must 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 outer top, except along the front of the dryer which may be partially closed in if[...]

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 affected[...]

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, bu[...]

15 IMPORTANT: Exhaust back pressure measured by a manometer in the exhaust duct must be no less than 0 and must not exceed 0.3 inches (0.74 mb) of water column (W.C.). IMPORTANT: Minimum ductwork diameter for horizontal venting is 10-inches (25.4 cm) and for vertical venting the minimum is 12-inches (30.48 cm). NOTE: When the exhaust ductwork passe[...]

16 IMPORTANT: Minimum duct size for a dryer that is vented vertically is 12-inches (30.48 cm) for a round duct or an equivalent of 120 square inches (774.2 square centimeters). THE DUCT SIZE MUST NOT BE REDUCED ANYWHERE DOWNSTREAM OF THE DRYER. IMPORTANT: For extended ductwork runs, the cross section area of the ductwork can only be increased to an[...]

17 a. Outside Ductwork Protection 1) To protect the outside end of the horizontal ductwork from the weather, a 90° elbow bent downward should be installed where the exhaust exits the building. If the ductwork travels vertically up through the roof, it should be protected from the weather by using a 180° turn to point the opening downward. In eith[...]

18 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,[...]

19 2. Electrical Service Specifications IMPORTANT: The dryer must be connected to the electric supply shown on the data label that is affixed to the left side panel/wall area behind the control door. In the case of 208 VAC or 240 VAC, the supply voltage must match the electric service specifications of the data label exactly . IMPORTANT: The wire s[...]

20 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/NFPA NO. 70-LATEST EDITION, or in Canada, the installation must conform to applicable Canada Standards: Canadian El[...]

21 Connect L1 and L2 to the power block and ground to the copper lug located in the rear service box mentioned on the previous page. If local codes permit, power to the dryer can be made by the use of a flexible U.L. listed power cord/ pigtail (wire size must conform to rating of dryer), or the dryer can be hard wired directly to the service breake[...]

22 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 3-phase (3ø) dryer. For gas dryers manufactured for operation at 3-phase (3[...]

23 c. 3-Phase (3 ø ) Wiring Connections (Hookup) - For Reversing Models Only The electrical connections on ALL 3-phase (3 ø ) gas model dryers are made into the rear service box located at the upper left area of the dryer. NOTE: A C I RCU IT SER V I C I NG EACH DR YER MUST BE PROVIDED. If local codes permit, power to a gas dryer can be made by th[...]

24 G . GA S 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 requirem[...]

25 2. Technical Gas Data a. Gas Specifications b. Gas Connections Inlet connection --- 3/4-inch N.P.T. Inlet supply size --- 3/4-inch N.P.T. (minimum) Btu/hr input -------- 204,000 (51,408 kcal/hr) 1) Natural Gas Regulation is controlled by the dryer’s gas valve’s internal regulator. Incoming supply pressure must be consistent between a minimum[...]

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

27 Consistent gas pressure is essential at ALL gas connections. It is recommended that a 3/4-inch (19.050 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[...]

28 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 ,” “ WARNING ,” 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 left side p[...]

29 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. Turn on electric power to the dryer. a. Open AL[...]

30 NOTE: To check for proper sail switch operation, open the main door and while holding main door switch plunger in, start the 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 th[...]

31 b. Dual Timer Models 1) Both dwell (stop) time and basket (tumbler) spin time are adjustable (refer to the illustration on page 37) . 8. Check to insure that ALL setscrews (i.e., basket [tumbler] drive, idler, etc.) are tight. J. PREOPERA TIONAL INSTRUCTIONS 1. To start the dryer... a. Microprocessor Controller (Computer) Dryers... 1) The light [...]

32 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 reseller from whom the ADC equipment was purchased. If the reseller cannot be contacted or is unknown, contact the ADC Service Department for a reseller in your [...]

33 SECTION V W ARRANTY INFORMA TION A. RETURNING WARRANTY CARD(S) 1. Before any dryer leaves the ADC factory test area, 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 fi[...]

34 2. Each part must be tagged with the following information: a. Model number and serial number of the dryer from which part was removed. b. Nature of failure (be specific). c. Date of dryer installation. d. Date of part failure. e. Specify whether the part(s) being returned is for a replacement, a credit, or a refund. NOTE: If a part is marked fo[...]

35 SECTION VI 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 [...]

36 90 DAYS 1. Remove lint from around basket (tumbler), drive motors, and surrounding areas. 2. Remove lint from gas valve burner area with a dusting brush or vacuum cleaner attachment. 3. Clean any lint accumulation in and around both the blower and drive motor casing openings. NOTE: To prevent damage, avoid cleaning or touching the hot surface ig[...]

37 SECTION VII REVERSING TIMER SPIN/DWELL ADJUSTMENTS Timer models have an electronic reversing timer in the electrical service box, which is located in the upper left rear area of the dryer. Both the dwell (stop) time and the basket (tumbler) spin time are adjustable by mode selection switches located on the electronic timer (as noted in the illus[...]

38 SECTION VIII DA T A LABEL INFORMA TION A. DA T A LABEL When contacting American Dryer Corporation , certain information is required to insure proper service/parts information from ADC . This information is on the data label that is located in the left side panel/wall area behind the control door. When contacting ADC please have the model number [...]

39 THE DATA LABEL 1. MODEL NUMBER The model number is an ADC number, which describes the size of the dryer and the type of heat (gas, electric, or steam). 2. SERIAL NUMBER The serial number allows ADC to gather information on your particular dryer. 3. MANUFACTURING CODE NUMBER The manufacturing code number is a number issued by ADC , which describe[...]

40 1. For Models With Hot Surface Ignition (HSI) Module (CE Version) a. Upon completing installation of the replacement HSI module, reestablish power to the dryer. b. The HSI module’s “red” indicator light will light for up to approximately 5-seconds (self check routine). If the HSI module’s “red” indicator light stays on or flashes con[...]

41 SECTION X BURNER AND BASKET (TUMBLER)/LINT CHAMBER MANUAL RESET HI-LIMIT INSTRUCTIONS IMPOR T ANT MANUAL RESET HI-LIMIT INSTRUCTIONS FOR PHASE 6 MODELS (GAS MODELS ONL Y) This dryer was manufactured with a burner manual reset hi-limit and basket (tumbler)/lint chamber hi-limit thermostat which is monitored by the Phase 6 computer. If either manu[...]

ADC 113106 1 - 08/17/99-25 2 - 09/21/99-25 3 * 05/03/00-25 4* 09/29/00-20 5* 04/10/01-25 6 * 08/15/01-25[...]