ML-175 Installation/Operator's Manual 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 death. AVERTISSEMENT: Assurez-vous de bien suivre les instructions données dans cette notice pour réduire au minimum le risque dincendie ou dexplosion ou pour éviter tout dommage matériel, toute blessure ou la mort.
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 PRECAUTIONS displayed on the equipment or specified in the installation/operator's manual included with the dryer.
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. Caution: Label all wires prior to disconnection when servicing controls. Wiring errors can cause improper operation.
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. WARNING DRYER MUST NEVER BE OPERATED WITHOUT THE LINT FILTER/SCREEN IN PLACE...EVEN IF AN EXTERNAL LINT COLLECTION SYSTEM IS USED. IMPORTANT PLEASE OBSERVE ALL SAFETY PRECAUTIONS displayed on the equipment and/or specified in the installation/operator's manual included with the dryer.
Table of Contents SECTION I ................................................................................................................. 3 IMPORTANT INFORMATION A. Receiving and Handling ............................................................................................................... 3 B. Safety Precautions ....................................................................................................................... 4 SECTION II ..................................................
SECTION VI ROUTINE MAINTENANCE A. Cleaning ................................................................................................................................... 42 B. Adjustments .............................................................................................................................. 44 C. Lubrication ...............................................................................................................................
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 whatsoever is noticed, inspect further before delivering carrier leaves. Dryers damaged in shipment: 1.
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 RESULT. 1. DO NOT store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance. 2.
7. A program should be established for the inspection and cleaning of lint in the burner area, exhaust duct work, 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 duct work can create a potential fire hazard. 8. For personal safety, the dryer must be electrically grounded in accordance with local codes and/or the NATIONAL ELECTRIC CODE ANSI/NFPA NO.
SECTION II SPECIFICATIONS/COMPONENT IDENTIFICATION A. SPECIFICATIONS MAXIMUM CAPACITY (DRY WEIGHT) BASKET (TUMBLER) DIAMETER BASKET (TUMBLER) DEPTH BASKET (TUMBLER) MOTOR BLOWER (FAN/IMPELLOR) MOTOR DOOR OPENING (DIAMETER ) BASKET (TUMBLER) VOLUME DRYERS PER 20'/40' CONTAINER DRYERS PER 45'/48' TRUCK VOLTAGE AVAILABLE APPROX. WEIGHT (UNCRATED) APPROX. WEIGHT (CRATED) HEAT INPUT AIRFLOW Inlet Pipe Size COMPRESSED AIR VOLUME COMPRESSED AIR CONNECTION VOLTAGE AVAILABLE APPROX. WEIGHT (UNCRATED) APPROX.
Specifications MLG-175 (Gas) MLS-175 (Steam) NOTE: ADC reserves the right to make changes in specifications at any time, without notice or obligation.
B. COMPONENT IDENTIFICATION 1. Dryer Front View Illus. No.
Illus. No.
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: National Fuel Gas Code ANSI.Z223.1-LATEST EDITION and/or National Electric Code ANSI/NFPA NO. 70-LATEST EDITION. A. LOCATION REQUIREMENTS Before installing the dryer, be sure the location conforms to local codes and ordinances.
B. UNPACKING/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 remove the four (4) lag bolts securing the base of the dryer to the wooden skid.
2. If more headroom is needed when moving the dryer into position, the top console (module) may be removed. a. To Remove Top Console (module)... 1) Disconnect the ground wire (A in the illustration below) located at the rear upper left corner of the dryer. 2) Remove the eight (8) sets of nuts and washers (B in the illustration below) holding the console (module) to the base.
C. DRYER ENCLOSURE REQUIREMENTS Even though a 12-inch clearance is acceptable, it is recommended that the rear of the dryer be positioned approximately two (2) feet (24-inches) from the nearest obstruction (i.e., wall) for ease of installation, maintenance, and service. Bulkheads and partitions should be made from noncombustible materials. The clearance between the bulkhead header and the dryer must be a minimum of four (4) inches and must not extend more than four (4) inches to the rear of the front.
D. FRESH AIR SUPPLY 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. Ignition problems and sail switch "fluttering" problems may result, as well as premature motor failure from overheating.
E. EXHAUST REQUIREMENTS 1. General Exhaust Duct Work Information Exhaust duct work should be designed and installed by a qualified professional. Improperly sized duct work 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, burner hi-limits, or basket (tumbler) hi-heat thermostats. CAUTION: DRYER MUST BE EXHAUSTED TO THE OUTDOORS.
a. Outside Duct Work Protection 1) To protect the outside end of horizontal duct work from the weather, a 90° elbow bent downward should be installed where the exhaust exits the building. If the duct work travels vertically up through the roof, it should be protected from the weather by using a 180° turn to point the opening downward. In either case, allow at least twice the diameter of the duct between the duct opening and the nearest obstruction.
It is suggested that the duct work from each dryer not exceed twenty (20) feet with no more than two (2) elbows (excluding dryer connections). If the duct work exceeds twenty (20) feet or has numerous elbows, the cross sectional area of the duct work must be increased in proportion to the length and number of elbows in it. In calculating duct size, the cross-sectional area of a square or rectangular duct must be increased twenty percent (20%) for each additional twenty (20) feet.
NOTE: Where the exhaust duct passes through a wall, ceiling, or roof made of combustible materials, the opening must be 2-inches larger (all the way around) than the duct. The duct must be centered within this opening. a. Outside Duct Work Protection 1) To protect the outside end of horizontal duct work from the weather, a 90° elbow bent downward should be installed where the exhaust exits the building.
The duct work should be smooth inside with no projections from sheet metal screws or other obstructions which will collect lint. When adding ducts, the duct to be added should overlap the duct to which it is to be connected. ALL duct work joints must be taped to prevent moisture and lint from escaping into the building. Inspection doors should be installed at strategic points in the exhaust duct work for periodic inspection and clean-out of lint from the duct work.
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F. ELECTRICAL INFORMATION 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, and workmanship must conform to the applicable requirements of the National Electrical Code ANSI NFPA NO.70-LATEST EDITION.
2. Electrical Service Specifications MLG-175 (Gas) MLS-175 (Steam) ELECTRIC SERVICE SPECIFICATIONS (per dryer) IMPORTANT: 208 VAC and 230/240 VAC ARE NOT THE SAME. When ordering, specify exact voltage. NOTE: A. Fuse ratings are dual-element, time-delay, current limiting, class RK1 or RK5 ONLY. B. Circuit breakers are thermal magnetic (industrial) type ONLY. For others, calculate/verify correct breaker size according to appliance amp draw rating and type of breaker used. C.
3. Electrical Connections NOTE: A wire diagram is included with each dryer and is affixed to the back side of the top control (access) door. The only electrical input connections to the dryer are the 3-phase (3ø) power leads (L1, L2, and L3), GROUND, and in the case of 4 wire service, the NEUTRAL. These electrical connections are made at the terminal block located in the service/relay box at the rear, upper left hand corner of the dryer.
4. Grounding Grounding (earth) connections 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. The ground connection may be to a proven earth ground at the location service panel. NOTE: A grounding connection (terminal lug) is provided in the in the dryers electrical service/relay box at the rear, upper left hand corner of the dryer.
G. GAS INFORMATION 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 requirements of the National Fuel Gas Code ANSI Z223.1-LATEST EDITION.
2. Technical Data a. Gas Specifications TYPE GAS Natural Gas Liquid Propane Gas 3.5 inches W.C. 10.5 inches W.C. 6.0 - 12.0 inches W.C. 10.5 inches W.C. Manifold Pressure* Inline Pressure OF * Measured at the gas valve pressure tap when the gas valve is on. b. Gas Connections: Inlet connection ---------- 1-1/2-inch N.P.T. Inlet supply size ---------- 1-1/2-inch N.P.T.
3. Piping/Connections ALL components/materials must conform to National Gas Code Specifications. It is important that gas pressure regulators meet applicable pressure requirements and that gas meters be rated for the total amount of ALL the appliance BTU's being supplied. The dryer is provided with a 1-1/2 inch N.P.T. inlet pipe connection extending out the back area of the burner box. The minimum pipe size (supply line) to the dryer is 1-1/2 inch N.P.T.
IMPORTANT: The dryer and its individual shut-off valve must be disconnected from the gas supply piping system during any pressure testing of that system at test pressures in excess of 1/2 psig (3.5 kPa). NOTE: The dryer must be isolated from the gas supply piping system by closing its individual manual shut-off valve during any pressure test of the gas supply system at test pressures equal to or less than 1/2 psig (3.
H. STEAM INFORMATION It is your responsibility to have ALL steam plumbing connections made by a qualified professional to assure that the 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 will VOID THE WARRANTY.
b. The steam supply piping to the dryer must include a 12-inch rise along with a drip trap and check valve. This will prevent any condensate from entering the steam coil. c. Flexible hoses or couplings must be used. The dryer vibrates slightly when it runs and this will cause the steam coil connections to crack if they are hard piped to the supply and return mains. d. Shut-off valves for each dryer should be installed in the supply line, return line, and drip trap return line.
4. Steam Damper Air System Connections The ML-175 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. (Refer to the bottom illustration on page 32). a. Air Requirements COMPRESSED A IR S UPPLY Normal Minimum Supply Maximum Supply A IR P RESSURE 80 PSI 70 PSI 90 PSI b.
5. Steam Damper Air Piston (Flow Control) Operation Adjustment Although the steam damper operation was tested and adjusted prior to shipping at 80 PSI, steam damper operation must be checked before the dryer is put into operation. Refer to the illustration above for correct steam damper operation. If steam damper adjustment is necessary, locate the flow control valve and make the necessary adjustments as noted below.
I. PREPARATION FOR OPERATION/START-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 inside front side panel (refer to the illustration in Section VIII of this manual). In the case of 208 VAC or 230/240 VAC THE SUPPLY VOLTAGE MUST MATCH THE ELECTRIC SERVICE EXACTLY. 3.
J. PREOPERATIONAL 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. 2. Make sure the main door is closed and the lint drawer is securely in place. 3. Refer to the Operating Instructions for starting your particular model dryer. 4.
IMPORTANT: There is no regulator provided in an L.P. dryer. The water column (W.C.) pressure must be regulated at the source (L.P. tank) or an external regulator must be added to each dryer. b. Steam Models 1) Check to insure that the steam damper is functioning properly. a) The steam damper should not "slam" (open or closed) when it reaches the end of (piston) travel. Additionally, the steam damper should not bind and/or stop during travel.
9. Make a complete operational check of ALL operating controls. a. Microprocessor controller (computer) programs/selections... 1) Each microprocessor controller (computer) has be preprogrammed by the factory with the most commonly used parameter (program) selections. If computer changes are required, refer to the computer programming manual which was shipped with the dryer. b. Dual Timer check...
K. COMPRESSED AIR REQUIREMENTS The model ML-175 dryer requires an external supply of compressed air (2.5 cfm @ 80 PSI for gas models and 6 cfm @ 80 PSI for steam models). For Steam Models, compressed air is necessary for the air operated steam damper. On both the Steam Model as well as the Gas Models, compressed air is necessary/required for blower air jet operation...to clean lint from the impellor/fan (squirrel cage). 1. Air Requirements a. Microprocessor (computer) dryers...
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 shut-off valve. 2) SHUT OFF internal gas supply shut-off valve located in the gas valve burner area. a. STEAM MODELS ... discontinue the steam supply.
SECTION IV SERVICE/PARTS INFORMATION A. SERVICE 1. Service must be performed by a qualified trained technician, service agency, or gas supplier. If service is required, contact the distributor from whom the ADC equipment was purchased. If the distributor cannot be contacted or is unknown, contact the ADC Service Department for a distributor in your area.
SECTION V WARRANTY INFORMATION A. RETURNING WARRANTY CARD(S) 1. Before any dryer leaves the ADC factory test area, a warranty card (ADC Part No. 112254) 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 warranty claim. a. If a warranty card (ADC Part No.
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 for a credit or a refund, the invoice number covering the purchase of the replacement part must be provided. NOTE: Warranty tags (ADC Part No. 450064) are available at "no charge" from ADC upon request. 3. The company returning the part(s) must clearly note the complete company name and address on the outside of the package. 4.
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 duct work system. The frequency of cleaning can best be determined from experience at each location. Maximum operating efficiency is dependent upon proper air circulation. The accumulation of lint can restrict this air flow.
STEAM DRYERS Clean the steam coil fins. Suggest using compressed air and a vacuum cleaner with brush attachment. NOTE: 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 any local air conditioning supply house. 90 DAYS Remove lint from around basket (tumbler), drive motors, and surrounding areas. Remove lint from the gas valve burner area with a dusting brush or vacuum clearer attachment.
B. ADJUSTMENTS 7 DAYS AFTER INSTALLATION and EVERY 6 MONTHS THEREAFTER Inspect bolts, nuts, screws, (bearing set screws), nonpermanent gas connections (i.e., unions, shut-off valves, orifices), and grounding connections. Fan (impellor) V-belts, along with the motor and drive belts should be examined and replaced if necessary. Tighten loose V-belts when necessary. Complete operational check of controls and valves. Complete operational check of ALL safety devices (i.e.
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 illustration below).
SECTION VIII DATA LABEL LOCATION/INFORMATION DATA 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 inside front side panel (as shown in the illustration above). When contacting ADC please have the model number as well as the serial number readily available.
THE DATA LABEL 1. MODEL DRYER 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 ALL possible options on your particular model. 4.
SECTION IX PROCEDURE FOR FUNCTIONAL CHECK OF REPLACEMENT COMPONENTS 1. Microprocessor (computer) Board a. Upon completing installation of the replacement microprocessor (computer) board, reestablish power to the dryer. b. Start the drying cycle by pressing any of the preset cycles in letters “A” thru “F”. c. Verify that the motor(s) and the heat indicator dots, in the microprocessor (computer) L.E.D. (liquid emitting diode) display are on. (Refer to the illustration below.
d. Verify that the motor(s) heat, and door indicator lights on the back side of the microprocessor (computer) board are lit. (Refer to the illustration below.) 1) 2) 3) 4) 5) 6) 7) 8) 9) 10) 11) 12) 13) "FAN" (Blower) L.E.D. indicator "FOR" (Forward) output L.E.D. indicator "Rev" (Reverse) output L.E.D. indicator "Air" (Air Jet) output L.E.D. indicator "HT 1" (Heat) output L.E.D. indicator "Fuse" (Main Fuse) input L.E.D. indicator "Lint" (Lint Door) input L.E.D. indicator "Main" (Main Door) input L.E.D.
e. Open main door. The dryer must stop and ALL indicator lights on the back side of the microprocessor (computer) board must go out. (Refer to illustration on previous page [page 49].) f. Try to restart the dryer with the main door open. g. The microprocessor (computer) board's L.E.D. (light emitting diode) display must read "MAIN dOOR." h. Close the main door and restart the dryer. i. Functional check of microprocessor (computer) board is complete. 2. Hot Surface Ignition (HSI) System a.
ADC 113041 1- 11/09/98-50 2* 11/19/99-25 3- 01/18/00-50