American Dryer Corp. ML-75DII 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 122299MS/tcosta ADC Part No. 113122 WARNING: For your safety the information in this manual must be followed[...]

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 or THE STEAM SUPPLY BEFORE ANY COVERS or GUARDS ARE REMOVED FROM THE MACHINE TO ALLOW ACCESS FOR CLEANING, ADJUSTING, INSTALLATION, or TESTING OF ANY EQUIPMENT per OSHA (Occupational Safety and Health Administration) STANDARDS. CHILDREN SHOULD NOT BE ALLOWED TO PLAY ON[...]

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. Dryer(s) must not be installed or stored in an area where i[...]

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

SECTION VI ROUTINE MAINTENANCE ............................................................................ 43 A. Cleaning ................................................................................................................................... 43 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 heating unit area, exhaust ductwork, and inside 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 fire hazard. 8[...]

6 SECTION II SPECIFICA TIONS/COMPONENT IDENTIFICA TION A. SPECIFICA TIONS IMPORTANT: Steam dryers must be provided with clean, dry, and regulated 80 PSI +/- 10 PSI (5.51 bars +/- 0.69 bars) air supply. NOTE: ADC reserves the right to make changes in specifications at any time without notice or obligation. BASKET (TUMBLER) DIAMETER 37” 94 cm BASKE[...]

7 NOTE: ADC reserves the right to make changes in specifications at any time without notice or obligation. Specifications MLG-75D MLE-75 MLS-75[...]

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 Data Label and Installation Label (located on the left side panel/wall area behind the control door)[...]

9 2 . Dryer Rear View Illus. No. Description 1 Heating Unit 2 1/8-inch Compressed Air Supply Inlet (behind electric service relay box for steam units Only) 3* Electric Service Relay Box 4 Basket (tumbler) Bearing Mount Assembly 5 Idler Bearing Mount Assembly 6 Blower Motor Assembly 7 Leveling Leg (rear) 8 Basket (tumbler) Drive Motor Assembly (reve[...]

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 IMPORTANT: Dryer should be located where a minimum amount of exhaust duct will be necessary. B. UNP ACKING/SETTING UP Remove protective shipping material (i.e., plastic wrap, and/or optional shipping box) from dryer. IMPORTANT: Dryer must be transported and handled in an upright position at ALL times. The dryer can be moved to its final location[...]

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 outer top, except along the front of the dryer which may be partially closed in[...]

13 D. FRESH AIR SUPPL Y 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. Ignition pr[...]

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: 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 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 around). The duct must be[...]

16 IMPORTANT: 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 (HVAC) firm should be consulted for proper venting information. ALL ductwork should be smooth inside with no [...]

17 3. Multiple Dryer (Common) Venting If it is not feasible to provide separate exhaust ducts for each dryer, ducts from individual dryers may be channeled into a “common main duct.” The individual ducts should enter the bottom or side of the main duct at an angle not more than 45º in the direction of airflow and should be spaced at least 38-5[...]

18[...]

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 2. Electrical Service Specifications a. Gas and Steam Models O nly IMPORTANT: Figures shown are for non-reversing models only. For reversing models contact the factory. 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[...]

21 b. Electric Models Only IMPORTANT: Figures shown are for non-reversing models only. For reversing models contact the factory. 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 ma[...]

22 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[...]

23 Single-Phase (1Ø) Electrical Connections Leads Black + Positive White + Neutral Green + Ground or L2 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 breaker panel. In both cases, a st[...]

24 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 and steam dryers manufactured for operation at [...]

25 3) 3-Phase (3ø) Wiring Connections/Hookup “Reversing Models Only” The electrical connections on ALL 3-phase (3ø) gas and steam 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 [...]

26 a) Electrically Heated 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 and for any single-phase (1ø) motors (if present) is done internally to the dryer by the factory at the oven contactor. No single[...]

27 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[...]

28 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 (per dryer) --- 200,000 (50,400 kcal/hr) 1) Natural Gas Regulation is controlled by the dryer’s gas valve’s internal regulator. Incoming supply pressure must be co[...]

29 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 (L.P. Gas) or LATEST EDITION (for General Installation and Gas Plumbing), as well as local codes and ordinances and must be done by a qualified profe[...]

30 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 pressure (W[...]

31 IMPORTANT: Coil failure due to improper PH level will VOID THE WARRANTY . 2. Steam Requirements - High Pressure Inlet -------- 1-inch supply line connection -- qty. one (1) at top manifold. Return ----- 1-inch return line connection -- qty. one (1) at top manifold. 3. Installation Instructions To insure an adequate supply of steam is provided, b[...]

32 g. Water pockets in the supply line, caused by low points, will provide wet steam to the coil possibly causing steam coil damage. ALL horizontal runs of steam supply piping should be pitched 1/4-inch (6.35 mm) for every 1 foot (0.31 meters) back towards the steam supply header causing the condensate in the line to drain to the header. Install a [...]

33 a. Air Requirements b. Air Connection Air connection to system --- 1/8-inch N.P.T. c. No air regulator or filtration is provided with the dryer. External regulation/filtration of 80 PSI (5.51 bars) must be provided. It is suggested that a filter/regulator/gauge (F/R/G) arrangement be added to the compressed air line just before the dryer connect[...]

34 6. Steam Damper Air Piston (Flow Control) Operation Adjustment Although the steam damper operation was tested and adjusted prior to shipping at 80 PSI (5.51 bars), steam damper operation must be checked before the dryer is put into operation. Refer to page 33 for instructions to check steam damper system operation. If steam damper adjustment is [...]

35 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 ,” “ 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[...]

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

37 5. Electrically Heated Dryers a. Check to insure that electric oven/contactor assembly is activating. 6 . Make a complete operational check of ALL safety related circuits: a. Door Switch(es) b. Hi-Limit Thermostats c. Sail Switch (for Gas and Electric Models Only) NOTE: To check for proper sail switch operation (for gas and electric models only)[...]

38 10. Reversing Models Only - Basket (tumbler) dryer should never be operated with less than a 30 lb. (14 kg.) load dry weight. The size of the load will affect the coast-down and dwell (stop) times. The basket (tumbler) must come to a complete stop before starting in opposite direction. a. Microprocessor Models 1) Spin and stop are not adjustable[...]

39 L. SHUT DOWN INSTRUCTIONS If the dryer is to be shut down (taken out of service) for a period of time, the following must be performed: 1. Discontinue power to the dryer either at the external disconnect switch or the circuit breaker. 2. Discontinue the heat supply: a. GAS MODELS ... discontinue the gas supply. 1) SHUT OFF external gas supply sh[...]

40 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 [...]

41 SECTION V W ARRANTY INFORMA TION A. RETURNING W ARRANTY 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, if you file[...]

42 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[...]

43 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 [...]

44 WARNING: When cleaning steam coil fins, be careful not to bend the fins. If fins are bent, straighten by using a fin comb which is available from local air conditioning supply houses. 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 [...]

45 B. ADJUSTMENTS 7 DAYS AFTER INSTALLATION and EVERY 6 MONTHS THEREAFTER Inspect bolts, nuts, screws, (bearing setscrews), and non-permanent gas connections (unions, shutoff valves, orifices, and grounding connections). Motor and drive belts should be examined. Cracked or seriously frayed belts should be replaced. Tighten loose V-belts when necess[...]

46 SECTION VII 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 by pressing any of the preset cycles in letters A-F. c. Verify that the motor(s[...]

47 d. Verify that the motor(s) heat and door indicator lights, on the back side of the microprocessor controller (computer) board are lit. (Refer to the illustration below ). 1) “FAN” (Blower) light emitting diode (L.E.D.) indicator 2) “FOR” (Forward) output L.E.D. indicator (for optional reversing models Only) 3) “Rev” (Reverse) output[...]

48 e. Open main door. The dryer must stop and ALL output indicator lights on the back side of the microprocessor controller (computer) board must go out . (Refer to the illustration on the previous page.) f . Try to restart the dryer with the main door open. g. The microprocessor controller (computer) board’s light emitting diode (L.E.D.) display[...]

49 SECTION VIII REVERSING TIMER SPIN/DWELL ADJUSTMENTS Dual timer models with “reversing option” have an electric reversing timer in the electric service box, which is located in the upper rear area of the dryer. Both the dwell (stop) time and basket (tumbler) spin time are adjustable by mode selection switches located on the electronic timer ([...]

50 SECTION IX DA T A LABEL INFORMA TION A. DA T A LABEL Contact American Dryer Corporation When contacting American Dryer Corporation certain information is required to insure proper service/parts information from American Dryer Corporation . This information is on the data label located on the left side panel/wall area behind the control door. Whe[...]

51 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 describes [...]

52 SECTION X BURNER and BASKET (TUMBLER)/LINT CHAMBER MANUAL RESET HI-LIMIT INSTRUCTIONS IMPOR T ANT MANU AL RESET HI-LIMIT INSTR UCTIONS 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 ma[...]

53 IMPOR T ANT MANU AL RESET HI-LIMIT INSTR UCTIONS FOR PHASE 6 MODELS (ELECTRIC OR STEAM MODELS ONL Y) This dryer was manufactured with a manual reset basket (tumbler)/lint chamber hi-limit thermostat which is monitored by the Phase 6 computer. If the manual reset thermostat is open prior to start of the drying cycle, the dryer will start momentar[...]

ADC 113122 1 - 12/29/99-25 2 - 01/04/00-100 3 - 02/25/00-100 4 - 05/09/00-250 5* 11/08/00-100 6* 03/20/01-100 7* 06/14/01-100[...]