1. Manuals
  2. Brands
  3. American Dryer Corp. Manuals
  4. Dryer
  5. ML-78 Phase 7 (DSI)
  6. Installation manual

American Dryer Corp. ML-78 Installation Manual

Gas/electric/steam
Hide thumbs Also See for ML-78:
Table of Contents

Advertisement

Quick Links

Download this manual
ML-78
(Gas/Electric/Steam)
Installation Manual

Advertisement

Table of Contents
loading

Related Manuals for American Dryer Corp. ML-78

Summary of Contents for American Dryer Corp. ML-78

  • Page 1 ML-78 (Gas/Electric/Steam) Installation Manual...
  • Page 2 ML-78 DATE OF PURCHASE MODEL NO. DISTRIBUTORS NAME Serial Number(s)
  • Page 5 Table of Contents...

  • Page 7: Receiving And Handling

    A. RECEIVING and HANDLING Dryers damaged in shipment: 1. ALL dryers should be inspected upon receipt and before they are signed for. 2. If there is suspected damage or actual damage, the trucker's receipt should be so noted. 3. If the dryer is damaged beyond repair, it should be refused. Those dryers which were not damaged in a damaged shipment should be accepted, but the number received and the number refused must be noted on the receipt.

  • Page 8: Safety Precautions

    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.
  • Page 10 ASKET UMBLER IAMETER ASKET UMBLER EPTH ASKET UMBLER OTOR PENING IAMETER ASKET UMBLER OLUME 20’/40’’ C RYERS ONTAINER 45’/48’ T RYERS RUCK OLTAGE VAILABLE PPROX EIGHT UNCRATED PPROX EIGHT CRATED NPUT IRFLOW Inlet Pipe Size OLTAGE VAILABLE PPROX EIGHT UNCRATED PPROX EIGHT CRATED...

  • Page 11: Specifications

    Specifications* MLG-78 (Gas) MLS-78 (Steam)
  • Page 13 Illus. No. Description Heating Unit 1/8" Compressed Air Supply Inlet (behind Electric Service Relay Box for Steam Models ONLY) Electric Service Relay Box Tumbler Bearing Mount Assembly Idler Bearing Mount Assembly Basket (Drive) Motor Assembly (for Reversing Models ONLY) Blower Motor Assembly Dryer Exhaust * Electric service connections for Gas Models and Steam Models are made in this box...

  • Page 14: Location Requirements

    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.
  • Page 15 IMPORTANT: For microprocessor (computer) models, this wooden block must be removed before connecting power to the dryer or irreparable damage to the basket (tumbler) will result. The lint coops of ALL ML-78 dryers are supported during shipping by a bracket. REMOVE THIS BRACKET BEFORE STARTING THE DRYER.

  • Page 16: Dryer Enclosure Requirements

    C. DRYER ENCLOSURE REQUIREMENTS Bulkheads and partitions should be made of noncombustible materials and must be located a minimum of twelve (12) inches (18-inches 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 desired. 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.

  • Page 17: Fresh Air Supply

    IMPORTANT: Even though a minimum of only 12-inches is required, 18-inches or more is suggested. The additional clearance is advantageous for ease of installation and service. IMPORTANT: When fire sprinkler systems are located above the dryers, a minimum of 18-inches above the dryer console (module) is required. Dryers may be positioned side wall to side wall however, a 1/16"...
  • Page 18 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.

  • Page 19: Exhaust Requirements

    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.
  • Page 20 IMPORTANT: Minimum duct work diameter for horizontal venting is 10-inches and for vertical venting the minimum is 12-inches. NOTE: Where the exhaust duct work 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.
  • Page 21 IMPORTANT: Minimum duct size for a dryer that is vented vertically is 12-inches for a round duct or an equivalent of 120 square inches. THE DUCT SIZE MUST NOT BE REDUCED ANYWHERE DOWN STREAM OF THE DRYER. IMPORTANT: For extended duct work runs, the cross section area of the duct work can only be increased to an extent.
  • Page 24 MLS-78 (Steam) LECTRIC IMPORTANT: 208 VAC and 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.
  • Page 25 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 Electric Code ANSI/NFPA NO. 70-LATEST EDITION. The ground connection may be to a proven earth ground at the location service panel.
  • Page 26 Connect L1 and L2 to the power block and ground to the copper lug located in the rear service box mentioned above. INGLE HASE LACK OSITIVE 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.
  • Page 27 1) GAS MODELS and STEAM 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 (1 ø) 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 3-phase (3ø), the electrical connections are made at the power distribution block located in the service box at the rear, upper left corner of the dryer.
  • Page 28 1) 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 is done internally to the dryer. No single-phase (1ø) input connection is required on a 3-phase (3ø) dryer. CAUTION: The dryer must be grounded.
  • Page 29 ø c. 3-Phase (3 ) Wiring Connections (Hookup) - for REVERSING MODELS ONLY The electrical connections on ALL 3-phase (3 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 dryer. NOTE: A CIRCUIT SERVING EACH DRYER MUST BE PROVIDED.

  • Page 30: Gas Information

    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.
  • Page 31 2. Technical Gas Data a. Gas Specifications Manifold Pressure* Inline Pressure * Measured at the gas valve pressure tap when the gas valve is on. 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) - 204,000 1) Natural Gas Regulation is controlled by the dryer's gas valve's internal regulator.
  • Page 32 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 3/4" N.P.T. inlet pipe connection located at the right side of the base of the dryer.
  • Page 33 Consistent gas pressure is essential at ALL gas connections. It is recommended that a 2-inch pipe gas loop be installed in the supply line serving 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 of water column pressure. NOTE: A water column test pressure of 3.5-4.0 inches for natural gas and 11.0 inches for L.P.

  • Page 34: Steam Information

    H. STEAM 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. IMPORTANT: Failure to comply with the requirements stipulated in this manual can result in component failure which will VOID THE WARRANTY.

  • Page 35: Steam Damper System

    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. This will allow the dryer to be isolated from the supply main and the return main if the dryer needs maintenance work.
  • Page 36 4. Steam Damper Air System Connections The MLS-78 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.
  • Page 37 5. Steam Damper System Operation The MLS-78 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 closed, ambient air is drawn directly into the basket (tumbler), allowing a rapid cool down (Diagram 2).
  • Page 38 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 page 33 or instructions to check steam damper operation.

  • Page 39: Preparation For Operation/Start-Up

    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 back side of the top front control/service door.

  • Page 40: Preoperational Tests

    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.
  • Page 41 c. Electric Models 1) Check to insure that electric oven/contactor assembly is activating. 3. Make a complete operational check of ALL safety related circuits: a. Door Switch(es) b. Hi-Limit Thermostats c. Sail Switch (for Gas Models and Electric Models ONLY) NOTE: To check for proper sail switch operation (for Gas Models and Electric Models ONLY), open the main door and while holding main door switch plunger in, start the dryer.
  • Page 42 7. REVERSING MODELS ONLY - basket (tumbler) dryer should never be operated with less than a 30 lb. a. Microprocessor Models 1) Spin Times and Stop Times are not adjustable in the Automatic Mode and have been preprogrammed into the microprocessor controller (computer) for 120-seconds spin time and a 5-second dwell (stop) time.

  • Page 43: Shut Down Instructions

    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.
  • Page 44 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.

  • Page 45: Returning Warranty Cards

    A. RETURNING WARRANTY CARD(S) a. If a warranty card (ADC Part No. 112254) did not come with your dryer, contact the ADC Warranty Department or ADC Service Department at (508) 678-9000. B. PARTS For a copy of the ADC commercial warranty covering your particular dryer(s), contact the ADC distributor from whom you purchased the equipment and request dryer warranty form ADC Part No.
  • Page 46 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.
  • Page 47 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.
  • Page 48 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 the fins are bent, straighten by using a fin comb, which is available from any local air conditioning supply house.

  • Page 49: Section Vii

    SECTION VII 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).

  • Page 50: Data Label

    SECTION VIII DATA LABEL When contacting American Dryer Corporation, certain information is required to in- sure 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.
  • Page 51 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.
  • Page 52 1. Hot Surface Ignition (HSI) System a. Upon completing installation of the replacement Hot Surface Ignition (HSI) module, reestablish power to the dryer. b. Start the drying cycle. c. The HSI module's "red" indicator light will light for up to approximately 5 seconds (self check routine).

Table of Contents