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American Dish Service AF-3D Series Service Manual
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American Dish Service AF-3D Series Service Manual

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Effective Date: May, 2008
American Dish Service
ADS UPRIGHT DISHWASHERS
MODELS: AF/AFC-3D, AF/AFC-3DS, LW/LWC, 5AG, AF/AFC/AFB, AD25
900 Blake Street
SERVICE MANUAL
Edwardsville, Kansas 66111
(913)-422-3700
© 05/08

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Summary of Contents for American Dish Service AF-3D Series

  • Page 1 Effective Date: May, 2008 American Dish Service ADS UPRIGHT DISHWASHERS MODELS: AF/AFC-3D, AF/AFC-3DS, LW/LWC, 5AG, AF/AFC/AFB, AD25 900 Blake Street SERVICE MANUAL Edwardsville, Kansas 66111 (913)-422-3700 © 05/08...
  • Page 2 IMPORTANT: American Dish Service provides this information as a service to our customers. Keep all instructions for future reference. Although ADS will make every effort to make sure the information in this service manual is correct and up-to-date, ADS does not certify that this is the case, and should you decide to utilize this manual, you do so at your own risk.

  • Page 3: Table Of Contents

    CONTENTS GENERAL OPERATOR PROCEDURES INSTALLATION CHEMICALS PREVENTIVE MAINTENANCE TROUBLESHOOTING REPAIR PROCEDURES REPLACEMENT PARTS SERVICE BULLETIN 10.0 SPECIFICATION SHEETS...

  • Page 4: General

    1.0 GENERAL The ADS Dishmachine is a manually loaded chemical sanitizing dish washing machine intended for use in restaurants or other food service facilities. The standard 20” x 20” rack is loaded with dishes, moved into the machine and the doors are closed. The operator presses the cycle start button and the machine operates.

  • Page 5: Operator Procedures

    2.0 OPERATOR PROCEDURES Daily Start-Up The following procedure should be followed at the beginning of each shift: 1. Inspect spray arms, drain screen, drain stopper and operating mechanism for cleanliness. 2. Inspect chemical containers to insure adequate supply for shift. 3.
  • Page 6 After Each Meal: 1. Drain the machine to clean. Remove End Plugs to clean upper and lower spray arms. If spray jets are clogged, use a toothpick to open, and rinse under faucet. Arms will not turn if jets are clogged.

  • Page 7: Installation

    3.0 INSTALLATION See Installation Manual...
  • Page 8 9. Confer with owner to insure that he understands the operation and is satisfied with the start-up. 3.2 REGISTRATION Record Model #, Serial # and other necessary information on Warranty Card and forward to: AMERICAN DISH SERVICE 900 Blake Street Edwardsville, KS 66111...

  • Page 9: Chemicals

    4.0 CHEMICALS All ADS machines require detergent and sanitizer for proper operation. A rinse-aid may be used if desired. Selection of the proper chemicals and the correct amounts will depend on several factors. Proper selection is vital if optimum results are to be realized. It may be necessary to change chemicals or adjust the quantity after the initial selection.
  • Page 10 Sanitizer Sanitizer should b 6% solution of sodium hypochlorite. The initial setting is 5cc and this should be checked regularly with a Chlorine Test Kit. Free chlorine in the final rinse should be 50 ppm or more. However, high concentrations can cause deterioration of metal. Rinse-Aid Rinse-aid reduces surface tension and causes the rinse water to run off in sheets rather than collect in droplets.

  • Page 11: Preventive Maintenance

    5.0 PREVENTIVE MAINTENANCE Machine should be inspected approximately once a month. The following steps will help to eliminate costly repair bills. 1. Check that all operator 8. Remove control system procedures (2.2) have cover and: been followed. a. Inspect cycle counter.

  • Page 12: Troubleshooting

    6.0 TROUBLESHOOTING Scope – This section should be used to isolate problems if the machine malfunctions. The following charts will diagnose most problems that may be encountered with the exception of those which are rather obvious. When a diagnosis has been made and confirmed, refer for Section 7.0 for repair procedures.

  • Page 44: Repair Procedures

    7.0 REPAIR PROCEDURES Repair procedures are organized around the major sub-assemblies of the machine. Most common procedures are included. In addition to specific procedures, each major sub-assembly is discussed with respect to its construction and operation. Before attempting any repair, maintenance personnel should be thoroughly familiar with the construction and operation of the equipment and should be certain that the diagnosis is correct.
  • Page 47 7.1.1 Door Guide Adjustment 1. Remove door (1) from machine and thoroughly clean all sliding surfaces using steel wool if necessary. 2. Check door guide strip (2) for wear or damage and replace if necessary. 3. Replace door, align it vertically; also, align the right hand door guide. 4.
  • Page 49 7.2.1 Pressure Check 1. Install special pressure fitting on one end of lower spray arm (1) and attach pressure gauge which reads 0 – 20 PSI. (Pressure gauge and fitting available from ADS – Part #88-1048.) 2. Close doors and start machine. 3.
  • Page 51 7.3.1 Gasket Replacement 1. Drain water from machine and open drain cock (2) on pump housing (3). 2. Place Master Switch in “off” position and remove fuses or open circuit breaker which services machine. Tag fuse or breaker with “DO NOT TURN ON” sign to prevent accidental energization. 3.
  • Page 52 7.3.3 Motor / Seal Replacement 1. Drain water from machine and open drain cock on pump housing (3). 2. Place Master Switch in “off” position and remove fuses or open circuit breaker which services machine. Tag fuse or breaker with “DO NOT TURN ON” sign to prevent accidental energization. 3.
  • Page 53 7.3.4 Capacitor Replacement 1. Remove screws (9) holding capacitor housing (10) to motor. 2. Disconnect wires from old capacitor. 3. Connect new capacitor and replace cover. 7.4 CONTROL SYSTEM ASSEMBLY (64-XXXX) The control system assembly encompasses all of those electrical components which operate the various functions of the machine.
  • Page 61 7.4.1 Timer & Switches The timer (1) consists of a drive motor and six cams. These cams open and close six corresponding switches (6) which in turn control most functions of the machine. Switch #1 controls both the timer motor and pump motor. When the machine is off and the timer is in its neutral position, no power is supplies to either the pump or timer motors.
  • Page 62 Adjustment of the left side of each cam will determine the length of time that the solenoid valve is open or the chemical pump operates and, thus, controls the amount of water or chemical introduced into the machine. Cams are adjusted using the special wrench which fits into notches on the side of the cam. The chart below shows factory cam settings.
  • Page 63 7.4.4 Anti-Vapor-Lock Modification This modification should be implemented when water temperature is in excess of 160° F (71° C) then vapor lock is unlikely and surging of the pump and corresponding fluctuation in pressure is probably due to air leaks in the pump intake or through the anti-foam valve (See Burpwire section at back of book). 7.4.5 Instant Start Relay (3) Replacement 1.
  • Page 64 7.4.8 Master Switch (12) Replacement – Models With Front Mount Control Box 1. Remove suction and discharge tubes from chemical pump in front of switch. 2. Loosen two mounting screws and remove pump from mounting brackets. 3. Disconnect wires from pump motor and set pump aside. 4.
  • Page 65 7.4.11 Replace Chemical Pump Tube (Squeeze Tube) 1. Remove suction and discharge tubes. 2. Remove four screws holding cover (13). 3. Remove chemical pump tube. 4. If rotor is to be replaced, remove the old rotor by loosening allen head set screw, install new rotor. Always install new Chemical Pump Tube when replacing rotor.
  • Page 66 7.5 FRESH WATER PLUMBING (65-XXXX) Fresh water is introduced through a fitting in the wash pump intake where it is pumped through the spray arms for rinsing. Soapy water from the wash cycle is rinsed from the pump and spray system, as well as, from the dishes.
  • Page 72 7.5.1 Clean / Replace Strainer Screen 1. Shut off water. 2. Remove strainer cap (4). 3. Remove screen and inspect. 4. Slightly open shut-off valve to flush loose scale or dirt from the strainer housing. 5. If screen is clogged, soak in lime remover. If screen is damaged, replace. 6.
  • Page 73 7.5.4 Replace Solenoid Valve Coil 1. Remove screw (1) on top of solenoid coil housing. 2. Remove coil. 3. Install coil on valve body and replace screw. 7.5.5 Overhaul Vacuum Breaker 1. Remove cap by turning counter-clockwise with channel-locks or pipe wrench. 2.
  • Page 76 7.6.1 Cleaning the Sump Screen 1. Remove and clean screen (21) in accordance with Daily Maintenance Procedure, Section 2.2. 2. Inspect for lime build-up, and clean with lime remover if required. 3. Reassemble. 7.6.2 Replace Drain Plug 1. Remove screw holding drain plug (6 or 34) assembly to chain (35). 2.
  • Page 77 7.6.5 Replace Thermometer (Model A & 5 Series) 1. Remove old thermometer (11) from sump using open end wrench. 2. Install new thermometer. Seal threads with pipe sealant or sealing tape. 7.6.6 Drain Solenoid Adjustment (Model A Series) 1. Remove two screws and solenoid cover (1). 2.
  • Page 78 7.6.8 Repair Linkage (Model W Series Prior to 1982) 1. Inspect linkage for binding and damage. 2. Remove stopper rod. 3. Remove screw connecting link to outer arm (20). 4. Remove nut, inner arm, and outer arm. 5. Remove nut and bushing. 6.
  • Page 79 7.6.11 Drain Ball Adjustment (Model W and ET Series 1982 and Newer) 1. Unscrew wingnut (4) and remove drain tube assembly (6) from drain rod (9). 2. Using a 7/16” wrench, turn ¼-20 nut clockwise to lower drain ball and counter-clockwise to raise the drain ball.
  • Page 82 7.7.1 Spring Adjustment 1. Turn nut (12) to increase or decrease tension. Insure that both springs are adjusted evenly on pass thru models. 2. Check adjustment by operating door. The door should remain raised when placed in the raised position and remain lowered when placed in the closed position. 7.7.2 Linkage Repair 1.

  • Page 83: Service Bulletin

    9.0 SERVICE BULLETIN Cautions on Inside Sump Drain Systems (ET-AF, AFW & AFWC) A. Unscrew wing nut and remove drain tube assembly from drain rod. B. Using a 7/16” wrench, turn ¼-20 nut clockwise two complete turns and reassemble. This procedure regulates water flow to the drain, thus eliminating back pressure.
  • Page 84 LUBRICATION The door arm pivots or support brackets have a half round saddle that the door arm handle rotates on. This area is lubricated during manufacturing. It is also recommended that occasional lubrication be used for this area. This will increase the life of the handle and pivot material.
  • Page 85 BURPWIRE To wire an ADS batch-type machine for a burp cycle, the following procedures have been prepared: On the top terminal of the sanitizer micro-switch (5 cam from the left) there are two wires joined together by connector. These are the yellow and brown coded wires. Remove these wires from the switch and separate the terminal connectors.
  • Page 86 American Dish Service Manufacturer of low and high temperature Commercial Dishwashers and Glasswashers 900 Blake Street Edwardsville, Kansas 66111 Ph:(913) 422-3700 Fax:(913) 422-6630...

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