Jackson 10LT Service Manual

MODEL 10LT AUTOMATIC

Warranty Policy

Installation Requirements

DISHWASHER

LOW TEMPERATURE CHEMICAL SANITIZING

ROUND DISHMACHINE

INSTALLATION, OPERATION AND

SERVICEMANUAL

INCLUDES:

-Operating Instructions

-Description of Components

-Troubleshooting Guide

WORLD HEADQUARTERS & MANUFACTURING OPERATIONS

-Basic Functions of Dishwasher

-Maintenance and Care

-Wiring Diagrams

Highway 25E, P.O. Box 1060

Barbourville, KY 40906

888/800-JMSC. Fax 606/523-9196

March 12,1999 (Reprinted without change) P/N 7610-100-05-00

INDEX

SPECIFICATIONS 3 GENERAL INSTRUCTIONS (installation/Dimensions) 4 GENERAL INSTRUCTIONS (Operation 6 SEQUENCEOFMACHINEOPERATIONS 7 GENERAL INSTRUCTI0NS (Preventive Maintenance) 7 REMOVALOF WASH HEADASSEMBUES 8 TIME FOR MODEL10LT DISHWASHERS 10 DEFECTIVETIMER MOTOR 11 FUNCTION of CIRCUIT BREAKER, SWITCHES, and INDICATOR LIGHT 12 REPLACEMENTS SWITCHES in CONTROL PANEL 13 DISPENSING SYSTEM for SANITIZING AGENT 14 PERISTALTIC PUMP SANITIZING DISPENSING SYSTEM (Operation) 15 REPLACING SEAL and CERAMIC on WASH And RINSE PUMP 16 GENERAL INSTRUCTIONS for DRAIN VALVE 18 DRAIN VALVE ASSEMBLY 19 SERVICE INSTRUCTIONS 20 TROUBLE SHOOTING GUIDE 21

PICTORIALS FRONT VIEW OF MACHINE 25 BACKVIEWOFMACHINE 26

RIGHTSIDEV1EWOFMACHINE 27 BOTTOM VIEWOF MACHINE 28 BASEVIEW 29 SUPPORT PIPE ASSEMBLY and HOOD ASSEMBLY 30 WASH and RINSE THERMOMETER, VACUUM BREAKER and INCOMING PLUMBING 31 SANITIZING AGENTINJECTOR 32 CONTROLBOX and CONTROL PANEL COMPONENTS 33 WIRING DIAGRAM 34 PARTS LIST 35 PARTS DISTRIBUTORS Inside Back Cover

SPECIFICATIONS

1 12

OPERATING CAPACITY 100% 10LT Racks per hour 43 Dishes per hour 910 Glasses per hour 910 OPERATING CYCLE Wash time - seconds 28 Rinse time - seconds 15 Total cycle - seconds 75 WASH TANK CAPACITY Gallons 2.3 RINSE TANK CAPACITY Gallons N/A WASH PUMP CAPACITY Gallons per minute 70 WATER REQUIREMENTS 100% Inlet Temperature ºF 120-140 Gallons per hour 100 Flow Pressure, PSI 20 Flow, gallons per minute 10 Inlet size - IPS 3/4" Drain size - IPS 1-1/2" WASH PUMP MOTOR Horsepower 1/2 RINSE PUMP MOTOR Horsepower 1/2 WASH HEATER, KW N/A RINSE HEATER, KW N/A DIMENSIONS Hood outside diameter 19" Hood height above table 191/4" Base outside diameter 21" Depth below table level (without legs) 16" Standard table height, legs furnished 34" Maximum height for dishes 14" Rack size 171/2" dia. 10L Series Tested at NSF Available Using 5.25% Chlorine 50 PPM Sodium Hypochlorite for Sanitizing

ELECTRICAL RATING. MODEL 10L

Volts Phase Approximate Total

Load Amps

115

GENERAL INSTRUCTIONS

(INSTALLATIONS/DIMENSIONS)

Note: Read the following instructions carefully. Proper installation of your Jackson

Dishwasher will assure proper machine operation.

1. With machine base set in place, lift the table (with proper flanged cutout) over and above machine so that vertical flange on table cutout fits down inside of machine tub and horizontal flange on machine tub fits up tight against underside of the table.

2. Ease vacuum breaker piping supplied down through square cutout in the backsplash of table (directly behind machine).

3. Connect vacuum breaker piping to machine. The top union connects to its matching half on the bottom of the hood support block.

4. The bottom union of the piping connects to an adaptor pipe which, In turn, connects to the solenoid valve. The arrows on the solenoid valve Indicate the direction of water

flow to the machine. Tighten both connections.

5. Adjust machine base until small hole (1-7/8" diameter) behind large flanged hole, lines up with hole in support block of machine.

6. Insert internal vacuum breaker pipe (taped to hood support pipe) into support block with large end down and pinned end up. It should set in snug, retaining ring will prevent it from being inserted too far.

7. Lift hood and hood support pipe up over table and machine to clear the internal vacuum breaker pipe. Slide hood support pipe down over internal pipe and work support pipe down into support block hole. Locating pin will insure proper line up.

8. Make sure there are two "0" rings on lower support pipe near end ring.

9. While holding support pipe, start tightening nut by hand to prevent cross threading. It should tighten considerably by hand. Then continue tightening with a wrench. It may be necessary to work support pipe back and forth to seat nut properly.

10. When nut is tight, it should force flat the stainless steel and rubber washers tight to table top.

11. Rotate hood to insure it is free; if not, check level of machine, tightness of table to machine flange, centering of machine, level of table and hood support pipe. See instructions in manual for adjustments.

12. Connect drain to bottom of machine (1-1/2" IPS female fitting on bottom of machine) to conform with local and/or national codes. Drain Is a gravity feed system from machine.

13. Connect incoming 3/4" water line with capacity to supply 10 gallons per minute, flow at 20 PSI at a constant temperature of 120º-140ºF. This connection Is Just before the flow restrictor. Connect to conform with local and/or national codes (standards).

14. Electrical connections should be made through hole in bottom of control box to terminal board inside (to the right lower side of control box). This terminal board is accessible by removing the lower cover plate on control box. The terminals are marked LI and N. There is a grounding lug inside the control box on the bottom left. Be sure all connections made are tightened properly.

15. Install the proper circuit breaker, wire and conduit size to conform with local and/or national codes. Refer to data plate for electrical loads.

16. Do not apply power until step #20.

17. Remove all shipping tape holding drain strainer, wash head, rack support, etc., and assemble.

18. The sanitizing agent dispensing pump is located on the front shroud of the machine. Fill the opaque storage bottle that is provided with the machine to about 3 inches from the top with 5.25% Sodium Hypochlorite (FDA approved). Place the full bottle in the holder on the front right side of the machine. Insert the hose that leads to the left side of the pump into the storage bottle. The hose from the other side of the pump is connected to a fitting in the back of the unit.

19. Insert drain and pump strainers and then close hood.

20. Turn on water supply to machine, check for any leaks In plumbing and connections. To energize electrically, proceed as follows:

a. Turn on customer's circuit breaker controlling machine. b. Check voltage at incoming terminal L1 and Neutral. It should match data plate

voltage. Voltage at L1 and N should be checked to ground individually to insure that a high (or wild) leg is not connected. (Voltage exceeding 150V to ground would

indicate high leg.) c. If voltage is in required range, turn on 15 amp circuit breaker on side of control box. d. Turn on master switch only. e. Lift fill switch and hold for approximately 20 seconds. This will not fill wash tank to

overflow level. Check for any leaks and tighten where necessary. If no leaks are

present, continue to fill by holding the rinse/fill switch.

f. Open hood and check water level, it should be up about 1 1/2" deep in round tub.

Check water line making sure valve fully opens and closes as the switch is turned

on and off.

g. Lift the primer switch on the control panel. Observe the face of the pump and

watch to see if the cam roller rotates. If it rotates, continue to hold the switch up

with the hood open until the sanitizing agent passes through the pump and drops

into the machine in the back. If the cam roller does not rotate, check page 15.

h. If water is at proper level, close hood and turn on start switch. Run through one or

two full cycles to make sure wash pump water runs, drain opens and fresh water

solenoid lets water in.

i. Dishwasher is now ready to proceed with washing of dishes in accordance with

operating instructions in this manual and instruction sticker on hood of dishwasher.

A. INLET 3/4" IPS B. DRAIN 1-1/2" IPS C. ELECTRICAL CONNECTION

D. CLEARANCE TO WALL

E. CLEARANCE FOR MAXIMUM

DISH HEIGHT OF 14" F. RATING PLATE

GENERAL INSTRUCTIONS

(OPERATION)

Note: Read the following instructions carefully. Proper operation of your Jackson

Dishwasher will assure clean and sanitized glasses and dishes at optimum efficiency.

Dish Preparation:

1. Scrape dishes thoroughly.

2. Pre-wash dishes by soaking or spraying with pre-rinse hose.

3. Place dishes and cups in dish rack; cups upside down.

4. Place the glasses upside down in the open rack. With the Model 10, a four compartment silverware rack is supplied. Place silver In compartment rack loosely, not allowing it to mix with other silverware of the same nature. Place the compartment rack in the open rack and wash with glasses or cups taking up excess area.

Operator's Instructions:

1. Make sure drain and pump intake strainer are clean and in place. For the first rack of a new meal period (when the machine is empty of water) slide an empty rack into the machine.

2. Close door and turn on master switch.

3. Lift fill switch and hold for approximately 20 seconds.

4. Open hood and slide soiled dishes into machine.

5. Dispense proper amount of detergent in machine and close hood.

6. Start machine by flipping start switch either up or down. Note: The start switch Is three positions: up = start, center = off, down = start. Indicator light will come on during automatic cycle.

7. When center light goes out, cycle has ended. Open hood, slide out rack of clean dishes. Slide in rack of soiled dishes, and repeat steps 6,7, and 8. (Add detergent, close hood and flip start switch in opposite direction.)

8. At end of meal time, shut off by placing start switch in center position. Drain machine by lifting drain switch and holding for approximately 30 seconds. Remove drain strainers after water has drained and clean. Clean wash head and replace clean strainers.

Detergent Recommendations and Rinse Additives:

We suggest that you contact your local Detergent Specialist for the correct detergent and rinse additives for your area. To help you until one can be reached, we suggest that you use a non-foaming dishwasher detergent, approximately one tablespoon in wash tank when machine is filled, and one tablespoon each cycle or load thereafter. This may have to be increased or decreased to obtain satisfactory results.

When manually dispensing powdered detergent in wash tub always distribute over a sufficient area to prevent build up. Some detergent, when dispensed in a small or concentrated area, may cause deterioration of the stainless tub or sump.

SEQUENCE of MACHINE

OPERATIONS

1. Start switch depressed.

2. Timer motor activated.

3. Wash/rinse cam switch activates motor for wash.

4. Wash ends, drain cam switch activates drain valve.

5. Drain ends, fill solenoid and peristaltic pump activated (dropping sanitizing agent in rinse water) by fill and pump cam.

6. Wash/rinse cam switch activates motor for rinse as fill ends.

7. Timer motor deactivated and cycle ends.

GENERAL INSTRUCTIONS

(PREVENTIVE MAINTENANCE)

THE FOLLOWING IS TO BE PERFORMED AS NEEDED.

Note: Read the following instructions carefully. Proper maintenance of your

Jackson Dishwasher will assure optimum service with a minimum of down time.

1. Remove all lime and corrosion deposits. (Always protect hands with waterproof

gloves to reduce chance of Irritation.)

a. Fill the machine with wash water as would ordinarily be done for washing. b. Remove hose from sanitizing agent bottle. c. Open door and place one cup or less of deliming compound into the water. (Be sure

to follow the directions on the compound label if they vary from these being given.)

The compound is available from your detergent supplier. d. Turn on the start switch and allow to go through one cycle. e. Open door and examine the interior. All lime should be removed and parts should

be shiny. If not, add more deliming compound and recycle.

f. After the interior is clean, empty the wash water by holding drain switch for

approximately 30 seconds. g. Refill machine and allow to run through a cycle, repeating this operation twice. h. Refill as it is ready for regular operation.

2. Clean strainers. a. Clean around sump opening, flat strainers and pump Intake strainer holes. b. Clean around pump intake (toothbrush makes excellent tool for cleaning).

3. Clean Y-strainer on incoming water line. (Water to machine must be turned 'off' for this

operation.) a. Remove plug and clean strainer.

4. Clean wash head assembly.

a. If spray jets are plugged, straighten a paper clip and use as a tool to dislodge and

flush with clean water.

b. If lodged items still remain in wash tubes, remove wash assembly. c. Clean assembly at sink by flushing water through spray jets. d. Reinstall wash assembly. (See page with instructions.)

5. Clean any deposits which may have built up on exterior moving parts.

REMOVAL of WASH HEAD

ASSEMBLIES

General Instructions:

1. With the hood closed, lift the drain switch and hold it for 30 seconds.

2. Open the hood.

3. Lift out the rack support rod assembly.

4. Clean the flat drain and pump intake pump strainers. Then replace.

5. Locate the Allen head set screw in the wash head cap, insert an Allen wrench and loosen the screw by turning counterclockwise.

6. Turn the wash head cap counterclockwise until cap is removed and put the cap in a safe place.

7. Remove the 1/4" stainless ball bearings carefully and put in a receptacle in a safe place. If any should drop in machine, you will be able to locate and retrieve if you replaced the flat strainer as

suggested in #3 above.

8. Lift and remove the small manifold with the short tubes. Put it in a safe place.

9. Remove the 1/4" ball bearing in a similar method to step #7-

10. Lift and remove the large manifold with the long length tubes similar to step #8.

11. The lower fixed race may be left in place.

12. Clean the ball bearings by soaking in a deliming solution.

13. The ball bearing race ways may be cleaned by either brushing with a deliming solution (toothbrush makes an excellent tool) or gently clean by rubbing with fine sandpaper or emery cloth.

14. Rinse the ball bearings and manifolds thoroughly.

15. To reassemble, first, fill the lower race to capacity with 1/4" ball bearings, then remove one. This will give proper movement needed during rotation of assembly.

16. Replace lower manifold and fill race fully with 1/4" ball bearings. Repeat, removing one only.

17. Replace upper manifolds and repeat necessary parts of step #15.

18. Replace wash cap by screwing on center shaft clockwise, finger tight.

19. Back off wash cap about % turn and tighten Allen set screw.

20. Rotate manifolds in opposite directions, see if they rotate freely. A rule of thumb is to select the longest tube in the bottom manifold and make sure it moves up and down at least 1/8" and no more than 1/4".

21. Close the hood doors and refill the dishwasher.

22. Run through several cycles and recheck wash arms for easy movement Adjust if necessary.

23. Replace rack support rod assembly.

WASH/RINSE HEAD ASSEMBLY P/N 1860

ITEM P/N DESCRIPTION

1. 1865 WASH CAP

2. 1870 WASH CAP SET SCREW

3. 1940 BALL BEARINGS (3 PLACES)

5. 1925 SMALL MANIFOLD

6. 1945 SPRAY TUBE (12 PLACES)

10. 1885 HOLDING BOLT

11.

1875 CENTER SHAFT

1930 LARGE MANIFOLD 1935 FIXED RACE 447 HOLDING NUT

WASH HEAD BASE

TIMER FOR MODEL 10LT

DISHWASHERS

General Description:

The timer is a self-contained (frame mounted) timer of the repeating cycle type. It is mounted in the control panel of the Jackson Dishwashing Machine to control the automatic functions of this machine. It consists of a clock motor which operates on 60 cycle, 110VAC. In addition to the clock motor, the timer also contains a driven cam arrangement which operates five micro switches.

Principle of Operation: The timer controls various operations of the automatic washer as per wiring diagram for each machine;

however, the timing cycle and the micro switches are the same for each model. The time for one complete revolution of the cam shaft Is approximately 150 seconds allowing two wash and two rinse operations for each complete revolution of the cam shaft. The micro switch nearest the timer motor is the hold circuit and uses both the NO and NC contacts. The micro switch second from the timer motor controls the wash/rinse and uses the NC contact. The micro switch third from the timer motor controls the rinse/fill and uses Just the NC contact. The micro switch fourth from the timer motor controls the drain and uses just the NC contact. The last micro switch, fifth from the timer motor, controls the peristaltic pump and uses just the NC contact.

Service Instructions: Caution: Always remove the power to the machine before working on the control panel or while servicing

the components in the door panel. All electrical checks should be made by qualified personnel.

Remove power to machine while attempting removal of control panel from box. Timer operation can be observed after removing the control panel from the control box by loosening the

four screws holding it. Hang the control panel using the two right hand screws with the back side of the panel outward.

If it is determined that the timer is defective, it is recommended that a new time be Installed. However, limited field maintenance can be accomplished as explained below:

A frozen contact on a micro switch will be indicated by one function being executed all the time or the absence

of a click when the switch arm is actuated.

To Replace Micro Switch:

1. Remove all wires from the timer and properly tag them to assure proper replacement

2. Remove all screws which hold the timer to the control panel.

3. One screw holds the micro switches, cams and actuating arms in the frame. This screw is seen on the side opposite the motor. Remove this screw. Note: Be sure to note which cam goes with which micro switch. Cam nearest timer motor has 1/2 raised and 1/2 depressed.

4. The unit can now be taken apart and the defective micro switch replaced.

5. Reassemble. Note: The flanges on the cams are such that they only mesh in one direction.

The timer's cam drive system is equipped with a clutch to enable one to view the operations of the cams and micro switches. Remove power to machine before touching timer. Rotate cams by turning with fingers; cams will turn in one direction, only. Do not force them. As cams actuate switches, listen for the 'click' of the switch or test the switches with an ohmmeter.

DEFECTIVE TIMER MOTOR

Caution: Always remove the power to the machine before working on the control panel or while

servicing the components In the door panel. All electrical checks should be made by qualified personnel.

A defective motor is indicated by the fact that the cams do not rotate or the machine does not perform the automatic operations or performs a specific part of the cycle continuously, but works okay on manual. Remember, the timer motor is controlled by the start switch and the hold micro switch; check this complete circuit before changing motor.

To Replace Motor

1. Remove motor leads from shorting bar and neutral.

2. Remove the two screws which hold the motor.

3. Replace with a new motor. Note: It may be necessary to remove complete timer to replace motor; if so, follow steps 1 and 2,

previous page.

A - TO UPPER TERMINAL START SWITCH B - TO LOWER TERMINAL START SWITCH

TYPICAL TIMER SWITCH

P/N1775

C - TO TERMINAL NUMBER 9 ON TB-2 D - TO TERMINAL NUMBER 10 ON F-SW E - TO TERMINAL NUMBER 2 ON M-SW F - SHORTING BAR CONNECTED TO ALL

THE THREE TIMER SWITCHES, TO TERMINALS (ON REAR),

NUMBER 6 ON DIAGRAM G -TO TERMINAL NUMBER 4 ON D-SW H - TO TERMINAL NUMBER 5 ON PR-SW

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