American Dryer Corp. ML-75V manual

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 ADC Part No. 113236 ML-75V Installation Manual Phase 7 WARNING: For your safety the information in this manual must be followed to minimize the risk of fire or explosion or to prevent proper[...]

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 efficient, trouble free, and most importantly, safe operation. ONLY qualified technicians should service this equipment. OBSERV[...]

IMPORTANT YOU MUST DISCONNECT AND LOCK OUT 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. WARNING CHILDREN SHOULD NOT BE ALLOWED T[...]

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. WARNING DRYER MUST NEVER BE OPERATED WITHOUT THE LINT FILTE[...]

SECTION I SAFETY PRECAUTIONS ............................................................................................. 3 SECTION II SPECIFICA TIONS/COMPONENT IDENTIFICA TION ...................................... 5 A. Specifications .................................................................................................................[...]

SECTION VII PROCEDURE FOR FUNCTIONAL CHECK OF REPLACEMENT COMPONENTS ............................................................................................................ 42 SECTION VIII DA T A LABEL INFORMA TION ................................................................................. 44 SECTION IX MANUAL RESET BURNER HI-LIMIT INSTR[...]

3 SECTION I 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 CO[...]

4 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 established for the inspection and cleaning of lint in the heating unit area, exhaust ductwork, and insi[...]

5 MAXIMUM CAPACITY (DRY WEIGHT) 75 lb 34 kg TUMBLER DIAMETER 37” 94 cm TUMBLER DEPTH 36” 91.5 cm TUMBLER VOLUME 22.4 cu ft 634.2974 L TUMBLER MOTOR 1 hp* 0.75 kW DOOR OPENING (DIAMETER) 31-3/8” 79.7 cm EXHAUST CONNECTION (DIAMETER) 10” 25.4 cm DRYERS PER 20’/40’ CONTAINER 10 / 20 DRYERS PER 48’/53’ TRUCK 24 / 24 WATER CONNECTION 3/4[...]

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

7 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 Drawer 5 Data Label and Installation Label[...]

8 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[...]

9 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 Electrica[...]

10 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 buildup. IMPOR T ANT : Dryer must be installed in a location/environment, which the ambient temperatur[...]

11 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 [...]

12 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[...]

13 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[...]

14 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. NOTE: As per the National Fuel Gas Code, “Exhaust ducts for type 2 clothes dryers shall be constructed of sheet m[...]

15 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 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 e[...]

16 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[...]

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18 F . ELECTRICAL INFORMA TION 1. Electrical Requirements ALL electrical connections must be made by a properly licensed and competent electrician. This is to ensure 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, and workmanship [...]

19 a. Gas and Steam Models O nly * AWG Stranded Wire Type - size wire as per National Electrical Code or local codes. ** 3-Wire available. 5/26/05 * AWG Stranded Wire Type - size wire as per National Electrical Code or local codes. ** 3-Wire available. 5/26/05 b. Electric Models Only ALL electrically heated dryers must be connected to the electric [...]

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 A ground lug is provided in the rear electrical box to connect your service ground. FOR 1 10V APPLICA TIONS FOR 208-230/240V APPLICA TIONS Single-Phase Electrical Lead Connections Black + Positive White or Red + Neutral or L2 Green + Ground[...]

22 The neutral will only be used on 4-wire service. This is typical for 380-416V, 50 Hz. 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 pr[...]

23 G . GAS INFORMA TION It is your responsibility to have ALL plumbing connections made by a qualified professional to ensure 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[...]

24 2. Technical Gas Data a. Gas Specifications Shaded areas are stated in metric equivalents. * Measured at outlet side of gas valve pressure tap when gas valve is on. b. Gas Connections: Inlet connection ------------ 3/4” N.P.T. Inlet supply size ------------ 3/4” N.P.T. (minimum) Btu/hr input (per dryer) --- 200,000 (50,400 kcal/hr) 1) Natura[...]

25 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 [...]

26 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.) pres[...]

27 H. STEAM INFORMA TION It is your responsibility to have ALL plumbing connections made by a qualified professional to ensure that the steam plumbing installation is adequate and conforms with local and state regulations or codes. IMPORTANT: Failure to comply with the requirements stipulated in this manual can result in component failure, which wi[...]

28 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 with a minimum 10-inch (25.4 cm) riser. This will prevent any condensate from draining towards the dryer. b. The steam supply line to the dryer must i[...]

29 4. Steam Damper Air System Connections This 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 inner top area of the dryer just in front of the electric service relay box. a. Air Requirement[...]

30 Diagram 1 shows the damper in the heating (open) mode, allowing heat into the basket (tumbler). Diagram 2 shows the damper in the cool down (closed) mode, pulling ambient air directly into the basket (tumbler) without passing through the coils. NOTE: With the dryer off or with no air supply, the steam damper is in cool down mode as shown in Diag[...]

31 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. In the case of 208 VAC or[...]

32 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. Open ALL s[...]

33 5. Electrically Heated Dryers Check to ensure 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), o[...]

34 10. Reversing Models Only - Basket (tumbler) dryer should never be operated with less than a 50 lb (22.67 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 dwell (stop) are not a[...]

35 2. Mechanical Drop/Rotary Coin Meter or Slide Coin Meter a. Insert coin and turn knob (rotary type meter), or for slide meter unit, push in coin chute. b. Select Temperature. c. Push the “Start” button. d. To stop dryer, open the main door. NON-COIN MODELS 1. The light emitting diode (L.E.D.) display reads “READY” (no cycle in progress).[...]

36 DUAL TIMER DR YERS 1. Turn drying timer knob for a time of 20 minutes. 2. Select “High Temp.” 3. Push “Push to Start” switch. 4. To stop dryer, open the main door. Spin and dwell (stop) times are adjustable at the reversing timer. REVERSING TIMER SPIN/DWELL ADJUSTMENTS Timer models have an electronic reversing timer in the electrical ser[...]

37 SECTION IV SER VICE/P AR TS INFORMA TION A. SER VICE 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 are[...]

38 SECTION V WARRANTY INFORMA TION A. RETURNING W ARRANTY CARDS 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 file a [...]

39 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[...]

40 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 [...]

41 W ARNING: 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[...]

42 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 applica[...]

43 2. For Models with Direct Spark Ignition (DSI) Module (Type I) 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 DSI module to keep the gas valve open as long as there is a call for heat. The DSI module will “[...]

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

45 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[...]

46 SECTION IX MANUAL RESET BURNER HI-LIMIT INSTRUCTIONS A. PHASE 7 This dryer was manufactured with a manual reset burner hi-limit thermostat, which is monitored by the Phase 7 computer. If the burner hi-limit is open prior to the start of the drying cycle, the dryer will start momentarily and then shut down, the Phase 7 computer will display “ B[...]

47 The exclusive Fire Suppression System (F.S.S.) will extinguish fires that may start in the drying basket (tumbler). A series of sensors positioned throughout the basket (tumbler) and interfaced with the microprocessor will trigger the F.S.S. water jet(s) to quickly extinguish the flames. The water jet(s) remain on for 2 minutes and will automati[...]

48 BEFORE YOU START! CHECK LOCAL CODES AND PERMITS Call your local water company or the proper municipal authority for information regarding local codes. IMPORTANT: It is your responsibility to have ALL plumbing connections made by a qualified professional to assure that the plumbing installation is adequate and conforms to local, state, and federa[...]

49 2. Water Connections: The water connection is made to the 3/4”-11.5 NH hose adapter of the electric water solenoid valve, located at the rear upper midsection of the dryer (refer to the photo). The water solenoid valve has a 3/8” M.P.T. connection supplied with a 3/4”-11.5 NH hose adapter to provide the minimum 1/2-inch supply (feed) line.[...]

50 OPTIONAL MANUAL BYPASS Provisions are made in the dryer’s F.S.S. for the installation of an optional manual bypass. Depending on the model dryer, the connections for the manual bypass are made at the “T” or “four way” fitting located in the outlet supply side of the water solenoid valve. The use and connections of this manual bypass ar[...]

51 F.S.S. Theory of Operation While the dryer is in an idle state, or 20-seconds after the heat turns off, the Phase 7 control monitors the thermistor probe, located in the top of the basket (tumbler) chamber, and records the minimum temperature. If the minimum recorded thermistor probe temperature is greater than 120° F (48° C) and the control d[...]

52 F.S.S. WATER VALVE CHECK The operation of the water solenoid valve can be tested to ensure that the water supply system and valve are functional. Before attempting a system check, be sure that ALL water supply shutoff valves to the dryer are in the OPEN position; the dryer must be in the “READY” mode with no cycle loaded or in progress. NON-[...]

53 F .S.S. DIAGNOSTICS MESSAGES OPEN THERMISTOR PROBE – This message indicates that the F.S.S. thermistor probe either is not connected or is damaged. If this condition is detected, the Phase 7 non-coin control will immediately enter F.S.S. DISABLED mode. SHORTED THERMISTOR PROBE – This message indicates that the F.S.S. thermistor probe is dama[...]

ADC Part No. 113236 4 - 05/26/05 - 2[...]