American Dryer Corp. Gas/Electric/Steam ML-55HS manual

ADC Part No. 113000 For replacement parts, contact the reseller from which the dryer was purchased or 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 W ARNING: For your safety the information in this manual must be followed to minimiz[...]

Retain This Manual In A Safe Place For Futur e Refer ence 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. OBSER VE ALL SAFETY P[...]

CHILDREN SHOULD NOT BE ALLOWED T O PLA Y ON OR NEAR THE DR YERS. W ARNING CHILDREN SHOULD BE SUPER VISED IF NEAR DR YERS IN OPERA TION. DR YERS SHOULD NEVER BE LEFT UNA TTENDED WHILE IN OPERA TION. CAUTION FOR YOUR SAFETY DO NOT DR Y MOP HEADS IN THE DR YER. DO NOT USE DR YER IN THE PRESENCE OF DR Y CLEANING FUMES. “Caution: Label all wires prior[...]

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 or specified in the installation manual included with the dryer . Dryers must not be installed or stored in an area wher[...]

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

SECTION VI ROUTINE MAINTENANCE .................................................................................. 4 2 A. Cleaning ................................................................................................................................... 42 B. Adjustments ......................................................................[...]

3 SECTION I IMPORTANT INFORMATION 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 damage w[...]

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 RESU[...]

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. [...]

6 SECTION II SPECIFICATIONS/COMPONENT IDENTIFICATION A. SPECIFICATIONS NOTE : ADC reserves the right to make changes in specifications at any time without notice or obligation. IMPORTANT : Steam dryers must be provided with clean, dry, regulated 80 PSI ± 10 PSI (5.52 bars ± 0.68 bars) air supply. AMPS WITHOUT HEAT RECLAIMER WITH HEAT RECLAIMER MA[...]

7 Specifications MLG-55HS MLE-55 MLS-55 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 Data Label and Installation Label (located on the backside of the upper control door).[...]

9 2. Dryer Rear View Illus. No. Description 1 Heating Unit 2 1/8" Compressed Air Supply Inlet (located behind the electric service relay box on steam models ONLY) 3* Electric Service Relay Box 4 Basket (Tumbler) Bearing Mount Assembly 5 Idler Bearing Mount Assembly 6 Blower Motor Assembly (Reversing Models ONLY) 7 Leveling Leg (rear) 8 Basket [...]

10 SECTION III INSTALLATION 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 Electrica[...]

11 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 while still attached to the skid or with the skid removed. To un-skid the dryer, locate and[...]

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 To compensate for the use of registers or louvers used over the openings, this make-up air must be increased by approximately thirty-three percent (33%). Make-up air openings should not be located in an area directly near where exhaust vents exit the building. It is not necessary to have a separate make-up air opening for each dryer. Common make[...]

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 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 centered within this opening. a. Outside Ductwork Protection 1) To protect the outside end of horizontal ductwork from the weather, a 90° elbo[...]

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[...]

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

19 2. Electrical Service Specifications a. Gas Models and Steam 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 backside of the upper control door. In the case of 208 VAC or[...]

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 Actual electrical wire connections are made to the L1 and L2 terminals of the motor contactor located in the rear service box mentioned above. The ground connection is also made to the copper lug also provided in this box. 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 mu[...]

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

23 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 o[...]

24 b. 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[...]

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. Technical Gas Data a. Gas Specifications b. Gas Connections: Inlet connection ------------ 1/2-inch N.P.T. Inlet supply size ------------ 1/2-inch N.P.T. (minimum) Btu/hr input (per dryer) ----160,000 (40,320 kcal/hr) 1) Natural Gas Regulation is controlled by the dryer's gas valve's internal regulator. Incoming supply pressure must[...]

27 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 [...]

28 NOTE : A water column (W.C.) test pressure of 3.5 inches (8.7 mb) for natural gas and 10.5 inches (26.1 mb) for liquid propane (L.P.) dryers is required at the gas valve pressure tap of each dryer for proper and safe operation. A 1/8" N.P.T. plugged tap, accessible for a test gauge connection, must be installed in the main gas supply line i[...]

29 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, be sure that the steam lines and steam return lines are sized and[...]

30 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 (0.30 meters) back towards the steam supply header causing the condensate in the line to drain to the header. Install a [...]

31 4. Steam Damper Air System Connections The MLS-55 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 inner top area of the dryer just in front of the electric service relay box. a. Air Requirements[...]

32 5. Steam System Operation The MLS-55 steam damper shown in Diagram 1 in the illustration below , allows the coil to stay constantly charged eliminating repeated expansion and contraction. When the damper is opened, the air immediately passes through the already hot coil, providing instant heat to start the drying process. When the damper is clos[...]

33 6. Steam Damper Air Piston (Flow Control) Operation Adjustment Although the steam damper operation was tested and adjusted prior to shipping at 80 PSI (5.52 bars), steam damper operation must be checked before the dryer is put into operation. Refer to the previous page for instructions to check steam damper operation. If steam damper adjustment [...]

34 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 [...]

35 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[...]

36 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[...]

37 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 adjustabl[...]

38 2. To stop the dryer... a. Microprocessor Controller (Computer) Dryer... 1) Press the CLEAR/STOP (red) button on the keyboard (touch pad). 2) Open the main door. b. Dual Timer Dryers 1) Open the main door. 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. Di[...]

39 SECTION IV SERVICE/PARTS INFORMATION 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 area[...]

40 SECTION V WARRANTY INFORMATION 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, if you file a [...]

41 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 f[...]

42 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 [...]

43 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 and/or touching ignitor/flame[...]

44 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. 1. Basket (tumbler) in For[...]

45 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" (R[...]

46 d. 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.) e. Try to restart the dryer with the main door open. f. The microprocessor controller (computer) board's light emitting diode (L.E.D.) displ[...]

47 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 ti[...]

48 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 backside of the upper control door. When contacting American Dryer Corporation please have the model number and serial number available. SECTI[...]

49 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[...]

50 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[...]

51 IMPOR T ANT MANUAL RESET HI-LIMIT INSTRUCTIONS 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 momentaril[...]

ADC 113000 9- 11/23/05-0[...]