Gebruiksaanwijzing /service van het product ML-75HS van de fabrikant American Dryer Corp.
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ADC Part No. 113001 For replacement parts, contact the distributor 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 .
Retain This Manual In A Safe Place For Future Reference Replacement parts can be obtained from your distributor or the ADC factory . When ordering replacement parts from the factory , you can F AX your order to ADC at (508) 678-9447 or telephone your orders directly to the ADC Parts Department at (508) 678-9000.
IMPOR T ANT YOU MUST DISCONNECT and LOCKOUT THE ELECTRIC SUPPL Y and THE GAS SUPPL Y or THE STEAM SUPPL Y BEFORE ANY COVERS or GUARDS ARE REMOVED FROM THE MACHINE TO ALLOW ACCESS FOR CLEANING, ADJUST- ING , INST ALLA TION, or TESTING OF ANY EQUIPMENT per OSHA (Occupational Safety and Health Administration) ST ANDARDS.
W ARNING The dryer must never be operated with any of the back guards, outer tops, or service panels removed. PERSONAL INJUR Y or FIRE COULD RESUL T . IMPOR T ANT PLEASE OBSER VE 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 IMPOR T ANT INFORMA TION ............................................................................... 3 A. Receiving and Handling ..........................................................................................
SECTION VI ROUTINE MAINTENANCE .................................................................................. 4 4 A. Cleaning .........................................................................................................................
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.
4 B. 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.
5 7. A program should be established for the inspection and cleaning of lint in the heating unit area, exhaust duct work, and inside the dryer . The frequency of inspection and cleaning can best be determined from experience at each location.
6 BA SKET DIA METE R 37 " 94 c m BA S KE T D E P T H 36 " 91 .5 c m BASKE T MOTO R 1 H P* .7 46 k w DOOR O PENIN G ( D iam ete r) 3 1-3/8" 79 .
7 NOTE: ADC RESER VES THE RIGHT T O MAKE CHANGES IN SPECIFICA TIONS A T ANY TIME, WITHOUT NOTICE or OBLIGA TION. Specifications MLG-75HS MLE-75 MLS-75.
8 B. COMPONENT IDENTIFICA TION 1. DR YER 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.
9 1. DR YER REAR VIEW NOTE : 1/8-inch Compressed Air Supply Inlet (for Steam Models ONLY) is located behind the Electric Service Relay Box. Illus. No. Description 1 Heating Unit 2 1/8" Compressed.
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: National Fuel Gas Code ANSI.
11 B. UNP ACKING/SETTING UP Remove protective shipping material (i.e., plastic wrap, and/or optional shipping box) from dryer . IMPOR T ANT : 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.
12 NOTE : Allowances must be made for opening the control door. Dryers may be positioned side wall to side wall. However, a 1/16" minimum allowance must be made for opening and closing of the control door and the lint door.
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 af fected.
14 E. EXHAUST REQUIREMENTS 1. General Exhaust Duct W ork Information Exhaust duct work should be designed and installed by a qualified professional. Improperly sized duct work will create excessive ba.
15 IMPOR T ANT : 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.
16 IMPOR T ANT : For extended duct work runs, the cross section area of the duct work can only be increased to an extent. When the duct work approaches the maximum limits noted in this manual, a professional heating venting air conditioning (HV AC) firm should be consulted for proper venting information.
17 3. Multiple Dryer (common) V enting 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.
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 with local and state regulations or codes.
20 2 . ELECTRICAL SER VICE SPECIFICA TIONS A. Gas and Steam Models IMPOR T ANT : Figures shown are for non-reversing models ONL Y . For reversing models contact the factory . IMPOR T ANT : The dryer must be connected to the electric supply shown on the data label that is affixed to the back side of the upper/top control door .
21 B. Electric Models Only IMPOR T ANT : Figures shown are for non-reversing models ONL Y . For reversing models contact the factory . IMPOR T ANT : The dryer must be connected to the electric supply shown on the data label that is affixed to the back side of the upper/top control door .
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 Electric Code ANSI/NFP A NO. 70-LA TEST E D IT I ON.
23 Si ng l e- Ph as e (1 Ø ) El e c tr i c a l C o n n e c ti on s L e ad s Bl a ck + Po s itiv e Wh i t e + Ne utr al Gr ee n + Gr o u nd or L2 Actual electrical wire connections are made to the L1 and L2 terminals of the motor contactor located in the rear service box mentioned above.
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 three phase (3Ø) dryer .
25 3) 3-Phase W iring Connections/Hookup "Reversing Models Only" The electrical connections on ALL 3-phase (3 Ø) gas and steam dryers are made into the rear service box located at the upper left area of the dryer .
26 IMPOR T ANT : A strain relief must be used where the input wiring enters the oven assembly . b) ELECTRICALL Y Heated Models ONL Y The only electrical input connections to the dryer are the 3-phase (3 Ø) power leads (L1,L2,L3 and sometimes neutral) and ground.
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 with local and state regulations or codes.
28 2. TECHNICAL GAS DA T A 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 1 ) Natural Gas Regulation is controlled by the dryer's gas valve's internal regulator .
29 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.
30 Consistent gas pressure is essential at ALL gas connections. It is recommended that a 3/4-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.
31 2. Steam Requirements - High Pressure Inlet -------- 1" supply line connection -- qty . one (1) at top manifold Return ----- 1" return line connection -- qty .
32 g. W ater 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 for every one (1) foot back towards the steam supply header causing the condensate in the line to drain to the header .
33 3. STEAM DAMPER AIR SYSTEM CONNECTIONS The MLS-75 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.
34 4. STEAM DAMPER SYSTEM OPERA TION The MLS-75 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.
35 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 for instructions to check steam damper operation.
36 I . P R E P 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 ," " W ARNING ," and " DIRECTION " labels attached to the dryer .
37 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.
38 Electrically Heated Dryers a. Check to insure that electric oven/contactor assembly is activating. 4. Make a complete operational check of ALL safety related circuits: a.
39 8. REVERSING MODELS ONL Y - basket (tumbler) dryer should never be operated with less than a 30 lb. 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.
40 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.
41 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 .
42 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 ( ADC Part No.
43 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.
44 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.
45 STEAM MODELS - clean the steam coil fins. W e suggest using compressed air and a vacuum cleaner with brush attachment. 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 house.
46 SECTION VII 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-F .
47 V erify 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. "F AN" (Blower) L.E.D. indicator 2. "FOR" (Forward) output L.E.D. indicator (for optional Reversing Models Only) 3.
48 d. Open main door . The dryer must stop and ALL output indicator lights on the back side of the micro- processor (computer) board must go out . (Refer to the illustration on previous page [ page 46 ].) e. T ry to restart the dryer with the main door open.
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 .
50 SECTION IX TECHNICAL INFORMA TION A. DA T A LA B E L Contact American Dryer Corporation When contacting American Dryer Corporation certain information is required to insure proper service / parts information from American Dryer . This information is on the data label located on the inside of the control door .
51 THE DA T A LABEL 1. MODEL DR YER 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.
ADC 113001 1 - 09/11/97-50 2* 01/12/98-50 3 - 04/16/98-50 4* 08/11/98-100 5* 12/07/98-100 6 - 09/21/99-100 7 - 01/03/00-200.
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