Jackson 24LM Service Manual

WORLD HEADQUARTERS & MANUFACTURING OPERATIONS

40906

Highway 25E, P.O. Box 1060

Barbourville, KY

888/800-JMSC

Fax: [phone] 7610-100-04-00

INDEX

INSIDE FRONT COVER

WARRANTY
SPECIFICATIONS 3
GENERAL INSTRUCTIONS (Installation) 4-5
INSTALLATION INSTRUCTIONS
for WALL MOUNT DISPENSER UNIT ONLY 6
INSTALLATION of TIE DOWN ASSEMBLY for CANADIAN STANDARDS 7
GENERAL INSTRUCTIONS (Operation) 8
OPERATOR'S INSTRUCTIONS for WALL MOUNT DISPENSING UNITS 9
GENERAL INSTRUCTIONS (Preventive Maintenance) 9
24L CYCLE SEQUENCE CHART 10
REMOVAL of WASH/RINSE HEAD ASSEMBLY (General Instructions) 10
WASH/RINSE HEAD ASSEMBLY PICTORIAL 11
TIMER for MODEL 24L 12
TIMER for MODEL 24L (Wall Mount Dispensing Systems) 13
TIMER MOTOR and ADJUSTMENT to CAMS
(For Wall Mount Dispensing Systems) 14
DEFECTIVE MOTOR 15
REPLACEMENT of SWITCHES In FRONT DOOR 16
INTERLOCK SYSTEM 16
CHECKOUT (Interlock System) 17
OPERATOR CONTROLS 18
SEQUENCE of MACHINE OPERATIONS 18
OPERATOR CONTROLS for WALL MOUNT DISPENSING SYSTEMS 19
SEQUENCE of MACHINE OPERATIONS 19
PERISTALTIC PUMP SANITIZING DISPENSING SYSTEM
(For Wall Mount Dispensing Systems) 20
PERISTALTIC PUMP SANITIZING DISPENSING SYSTEM (Operation) 21
SANITIZING AGENT INJECTOR PICTORIAL 22
SERVICE INSTRUCTIONS (Incoming Water Solenoid Valve) 23
SEAL and CERAMIC for PUMP SYSTEM (General Information) 22
TROUBLE SHOOTING GUIDE 25-27

PICTORIALS

FRONT VIEW of MACHINE 28
BACK VIEW of MACHINE 29
LEFTSIDE VIEW of MACHINE 30
RIGHT SIDE VIEW of MACHINE 31
BOTTOM VIEW of MACHINE 32
PAN STRAINER, VACUUM BREAKER. OVERFLOW
and INCOMING PLUMBING 33
PUMP and MOTOR ASSEMBLY 34
MOTOR STARTING RELAY, DRAIN, RELAY,
REAR VIEW of SWITCHES, and CONTROL PANEL 35
DRAIN VALVE SOLENOID, WASH/RINSE ASSEMBLY
and THERMOMETER 36
ELECTRICAL DRAWING 37
PARTS LIST 38-39
PARTS DISTRIBUTORS INSIDE BACK COVER

SPECIFICATIONS

17

60

27

46

20

4

"

36"

1/2"

24"

" 24"

2.

1

Available Chlorine

Adjustable by Cam

OPERATING CAPACITY 100%
Racks per hour
Dishes per hour

Glasses per hour

OPERATING CYCLE
Wash Time, seconds
Rinse Time, seconds

Total Cycle, seconds
WASH TANK CAPACITY (Gallons) 2.7

WASH/RINSE PUMP CAPACITY (GPM) 60

REQUIREMENTS 100%
Inlet Temperature, °F
Gallons per hour
Flow Pressure, PSI
Flow, GPM
Inlet size, IPS

Drain size, OD (Gravity Feed)

425
425

180

120°- 140°

1/2

1-1/2"

WASH/RINSE PUMP MOTOR (HP) 1/2
ELECTRICAL REQUIREMENTS, ONLY 115 volt, 1 ph. 60 HZ.

DIMENSIONS
Height with Top
Height without Top
Width
Clearance, wall to machine
Depth

Maximum height for dishes

RACKS
Standard Equipment
for dishes
for glasses and silverware

Size

SANITIZING L/LF

This is accomplished during the
rinse cycle by a mixture of water
and 5.25% Sodium Hypochlorite

Sanitizing (Wall Mount Dispenser)

19-3/4" x 19-3/4"

50 PPM for Sanitizing

34-

2-1/2

14"

on Timer

ELECTRICAL RATING 115 v., 1 phase, Approx Total Load Amps 8

Specifications subject to change without notice.

GENERAL INSTRUCTIONS

(INSTALLATION)

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

will assure proper machine operation.

Uncrating 24L:

1. Remove straps around carton.

2. Open top flaps of dishwasher carton.

3. Remove any packing from top and sides of machine that can be done with ease from top.

4. Slide carton sleeve upward over top of dishwasher, set to one side.

5. Lift dishwasher and wooden base from carton base.

6. Move dishwasher to general installation area.

7. Remove bolts holding wooden base to machine and screw in adjustable feet supplied.

8. Reassemble wash and rinse assemblies in machine using sketch and instructions in this manual.

9. Set dishwasher in place, ready for installation.

Note: NSF base cradle installation must be field installed on all LF and BF models. Cradle Is sealed to

floor with waterproof caulking or equal and dishwasher feet are set inside and on cradle.

Installation Instructions:

1. The unit must be installed a 1/4" higher in the front than in the back. It should not be level but higher in the front
to allow more water in the back of the tank.

2. Refer to dimensional data sketch for connections.

3. The drain from the machine is a gravity drain system and should, therefore, have the proper drop from the
machine to the kitchen's drain system. The drain connection is located to the left rear of the machine when
facing the machine's door. The drain fitting is 1-1/2" OD tube size. 7" from floor.

4. The incoming water line should be attached to the machine's connection which is located to the front left side of
the machine. The pipe size to the machine should be 1/2" and the water should be 120° - 140°F with a flow
pressure of 20 PSI.

5. The electrical connections should be made to the terminal board located at the left center front. The terminals
are marked L1, and L2. Install proper circuit breaker, wire and conduit size to conform with local and/or national
codes (standards).

6. Located behind the control panel and lower kick plate on the left side of the unit is the sanitizer pump and intake
tubing. Shipped with the machine is a 12" piece of gray PVC that is a tube stiffener for the white pump tubing.
Unroll the white tubing from the unit and push it through the slotted end of the stiffener until it is even with the
very tip of the angled end. Place your sanitizing agent bottle next to the machine and insert the tube stiffener
into the bottle.

DIMENSIONAL DATA

Reference only

Subject to change

LEGEND
A—ELECTRICAL HOOK UP

B—1/2" F.S.P.S. WATER INLET
C—1 1/2" DRAIN
CONNECTION
D—SANITIZER PUMP

Installation of Model 24LM Top and Table gasket:

These instructions are to be used for applying the adhesive backed sponge rubber strip to the top of the machine
prior to setting the table in place.

Included with the Model 24LM table is a 6' length of 1/4" thick x 1" wide sponge rubber adhesive
backed stripping.

Instructions for applying gasket:

1. Place one end of the stripping along the complete side
of leg support flange and cut it off.

2. Repeat the same procedure along the other side.

3. Place the remaining piece along the front edge and fit it
in between the side pieces and cut it to length.

4. Remove the backing and set the strips in place

Installation of Model 24LM Dishwasher Under Dishtable:

1. On the end of the table, locate bracket #4 opposite the sink end.

2. A rubber gasket #3 is supplied and should be secured to top frame of dishwasher.

3. Place dishtable #2 where it is to be installed and support the machine's end.

4. Slide dishwasher #1 underneath dishtable #2 so that the outside of machine is positioned against the
guide bracket #4. Make sure dishtable and dishwasher are in desired permanent location.

5. Using the two holes in bracket #4 as a guide, drill two holes 9/64" diameter in the side panel of machine.
Note: Drill through first thickness of metal only.

6. Using the self-tapping screws supplied, screw them through bracket #4 and into the side panel of
machine until screws are tight.

INSTALLATION INSTRUCTIONS FOR WALL MOUNT DISPENSER UNIT ONLY

1. Supplied with the unit is a wall mounted dispenser unit consisting of three peristaltic pumps mounted inside of a
stainless box with conduit and wires coming from the bottom. With the lower kick plate removed connect the conduit
to the ledge of the unit and connect the plastic connector on the wires to the connector on the timer. This will
provide the power to operate the dispensing pumps from the timer.

2. After the connecting the wires to the timer, mount the box to the selected surface, using the two holes provided in
the rear and with the appropriate fasteners for the application. Consideration for the location of the chemicals and
service of the pumps should be given when selecting a mounting place.

3. Turn the customer's circuit breaker on to the unit and check the electrical connections for the proper readings as
indicated on the machine data plate.

4. Turn on the water to the unit and check for any water leaks. If they check out replace the lower kick plate. If there
are no leaks push the top of the fill switch and hold for approximately 45 seconds.

5. Coming from each dispensing pump in the box is a different colored tube. Above each peristaltic pump in the box is
a primer switch. After making sure that the feeder tubes to the pumps are in their proper containers, as marked on
the pumps, press the switch and hold it until there is a discharge of the fluid into the machine. This is to be done to
each pump before the initial operation of the machine. Water must be in the wash/rinse tub to prevent discoloration
or deterioration of the stainless steel by chemicals.

Removal of Pan Strainer for Cleaning:

(Wash/Rinse Head Assembly must be removed prior to removing strainer.)

1. Drain machine by depressing drain switch for approximately 50 seconds.

2. Remove wing nut from upper pump housing; wash/rinse head may now be lifted out.

3. Pan strainer now accessible; lift out and clean thoroughly.

4. Clean around pump intake with bristle brush.

5. Replace strainer pan.

6. Reinstall wash/rinse head assembly.

7. Clean strainer pan daily or as needed to ensure proper machine operation.

Installation of Wash/Rinse Head Assembly:
(Items disassembled for shipment.)

1. Line holes up on wash head assembly to match slots in pump housing.

2. Insert wash head assembly down into upper pump housing as far as possible.

3. Insert retaining pin to secure wash head to pump housing.

INSTALLATION OF TIE DOWN ASSEMBLY FOR CANADIAN STANDARDS

1.

BASE CRADLE

1. Locate the desired floor area in which the unit is going to be installed.

2. Place the base cradle in the exact location the machine will set with the end having the holes drilled in it
to the rear.

3. Mark the holes and then drill two holes 3/8" in diameter, approximately 1-1/2" into the floor, no deeper.

4. Clean any debris out of the holes and place the sleeve anchors with the bolts into the hole. Press them
down and then tighten the nut down so that the anchor fastens firmly into the floor. Back off the nut and
remove it so that approximately 1/2" to 3/4" of the bolt is now a stud sticking up from the level of the
floor.

5. Lay the cradle in place over the studs and seal around the cradle with a silicone rubber sealant.

6. Attach the back panel to the machine by sliding it between the rinse water line and the unit, then
fastening it at the bottom corners to the machine. When the back panel is in place attach the anchoring
bracket loosely to the panel using the elongated slots.

7. Pick the machine up and set it into place on the base cradle. Make sure that the studs through the base
cradle are inserted into the holes in the bottom of the anchoring bracket.

8. Remove the lower front kick panel and level the machine trying to have It a 1/4" higher in the front than
in the back.

9. Once the unit is level fasten the nuts over the studs and tighten to the floor. Next

fasten the bolts and nuts that attach the anchoring bolts to the back panel.

10. When the unit is tightened down and securely in place the remainder of the installation can continue.

2. ANCHORING BRACKET

3. RINSE WATER LINE

4. BACK PANEL

5. ELECTRICAL CONNECTION CUT

OUT

6. INCOMING WATER CONNECTION

PUT OUT

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 hose.

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

4. Place glasses and silverware in combination glass-silverware rack, glasses upside down. Scatter silverware
loosely on bottom.

Note: Silverware in the upright position wash and rinse better than lying flat. These silverware

compartment racks are available through your dealer or service agency.

Operator's Instructions (Standard L/LF Model):

1. Check that pan strainer is clean. Strainer must be clean for proper machine operation (wash/rinse head must
be removed first, then strainer may be removed for cleaning).

2. Place start rocker switch in its center OFF position.

3. Close door and lock latch.

4. Place the sanitizing agent bottle (filled with 5.25% Sodium Hypochlorite) to the left front of machine. Place the
tube coming out of the left side of machine into the sanitizing bottle. The tube must be in the bottle for proper
machine operation. See instructions on separate page of this manual for complete details on sanitizing system.

5. Push top of fill switch and hold for approximately 45 seconds.

6. Open door and slide rack of soiled dishes into machine.

7. Dispense proper amount of detergent in machine.

8. Close and latch door. Start automatic cycle of machine by pushing on top or bottom of start switch; indicating
light will come on.

9. When indicating light goes out, cycle is over; remove clean dishes. Slide in rack of soiled dishes, dispense
proper amount of detergent, close door and push start switch for automatic cycle.

10. At end of mealtime, turn off machine by placing start switch In center position. Drain machine by depressing
drain switch approximately 45-50 seconds. Clean pan strainer and machine.

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.

OPERATOR'S INSTRUCTIONS FOR WALL MOUNT DISPENSING UNITS

1. Check that the pan strainer is clean. Strainer must be clean for proper machine
operation (wash/rinse head must be removed first, then strainer may be removed for cleaning).

2. Insert a rack of dishes and then close the door and turn handle.

3. Check the levels of the detergent, rinse additive and sanitizing agent containers. Fill them if
necessary.

4. Push the top of the fill switch and hold it for approximately 45 seconds.

5. Start the automatic cycle of the machine by pushing the top of the start switch and holding for a
count of three. This activates the time cycle and the cycle light will come on. During the cycle the
timer will automatically dispense the detergent, rinse additive, and sanitizer as they are needed.

6. When the cycle light goes out, open the front door and slide out the rack of clean dishes. Replace
them with a rack of soiled dishes and repeat steps #5 and #6.

7. At the end of a mealtime, drain the machine by depressing the drain switch for approximately 45­50 seconds. Clean the pan strainer and the machine.

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.

a. Fill the machine with wash water as would ordinarily be done for washing.
b. Open door and place one cup or less of de-liming compound into the water. The

compound is available from your detergent supplier.
c. Close door and push start switch.
d. Open door and examine the interior when cycle light goes out. All lime should be

removed and parts should be shiny. If not, scrub stubborn deposits and repeat

operation.

e. After the interior is clean, with door closed, empty the water by depressing drain

swtich for approximately 50 seconds. Refill machine and allow to run through cycle,

then again drain the reservoir. Machine is now ready for normal operation.

2. Clean around overflow strainers and drain hole.
a. Clean around overflow and strainer pan.
b. Clean around pump intake (toothbrush makes excellent tool for cleaning).

3. Clean Y-strainer on incoming water line. (Water and electricity to machine must be

turned OFF for this operation.) a. Remove plug and clean strainer.

4. Clean wash head assembly.
a. By removing the wing nut holding wash/rinse head assembly to pump, wash/rinse

head assembly can be removed.

b. Clean assembly at sink by flushing water through spray jets.

c. If spray jets are still plugged, use sharp object to dislodge and flush again.

d. Reinstall wash/rinse assembly. (See page with instructions.)

5. Clean any deposits which may have built up on exterior moving parts.
a. Clean around door gasket.
b. Using a soft bristle dry brush, clean around switches on exterior of control panel.

(Use no water.)

c. Use soft bristle brush, dip in wash tank water and scrub inside door around gasket

and hinges. Use clean cloth or paper towel to wipe off loose residue.

24L CYCLE SEQUENCE CHART

6.

N/A

OPERATOR

1. Push Power Switch

2. Close Door

3. Latch Door Handle

4. Push Fill Switch

5. Push Start Switch

7.

8.

9.

10.

11.

12.

13.

14.

15.

16.

OPERATION

Energizes to Handle Switch
Closes Door Side Switch
Energizes the Machine
Manually Fills Machine
Energizes Timer Motor
Dwell Time
Wash Cycle
Detergent Dispensed
Dwell Time
Drain Cycle
Dwell Time
Fill Cycle
Sanitizer Dispensed
Rinse Additive Dispensed
Rinse Cycle

TIME SECONDS

The rinse water used in the previous cycle will be used as the wash water in the next cycle. Each
cycle is one revolution.

REMOVAL of WASH/RINSE HEAD

ASSEMBLY

N/A
N/A
N/A
38-42

N/A
4-7
57-63
7-9
4-7
35-40
4-7
38-43
8-14
5-10
38-43

(GENERAL INSTRUCTIONS)

1. Before opening the door, hold the drain switch in and drain all of the water out of the unit.

2. Open the door and allow the unit a few minutes to cool off.

3. With your fingers, loosen the wing nut on the wash head assembly and lift it up and out. Take it to a
safe place and begin to disassemble it according to the following instructions.

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

5. Turn wash head cap counterclockwise until cap is removed and put cap in safe place.

6. Remove 1/4" stainless ball bearings carefully and put it in a receptacle in a safe place.

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

8. Remove 1/4" ball bearing in similar method to step #6.

9. Lift and remove large manifold with large length tubes simitar to step #7.

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

11. Clean ball bearings by soaking in de-liming solution.

12. Ball bearing race ways may be cleaned by either brushing with de-liming solution (toothbrush makes

excellent tool) or gently clean by rubbing with fine sandpaper or emery cloth.

13. Rinse ball bearings and manifolds thoroughly.

14. To reassemble, first fill lower race to capacity with 1/4" ball bearings, then remove one. This will give

proper movement needed during rotation of assembly.

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

16. Replace upper manifolds and repeat necessary parts of step #14.

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

18. Back off wash cap about 1/4 turn and tighten Allen set screw.

19. 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".

20. Close the front door and refill dishwasher.

21. Run through several cycles and recheck wash arms for easy movement. Adjust If necessary.

ITEM P/N DESCRIPTION ITEM P/N DESCRIPTION

1. 1865 WASH HEAD CAP WITH RACE 6. 1875 WASH HEAD CENTER SHAFT

2. 1870 WASH HEAD CAP SET SCREW 7. 1936 WASH HEAD FIXED RACE

3. 1940 WASH HEAD BEARING 1/4 " S/S 8. 1886 WASH HEAD SHAFT HOLDING PIN

4. 1890 WASH HEAD SMALL MANIFOLD 9. 1096 UPPER PUMP HOUSING
w/TUBES 10. 1898E WASH HEAD ASSEMBLY

5. 1895 WASH HEAD LARGE MANIFOLD
wfTUBES

RETAINING PIN w/RING

TIMER for MODEL 24L

General Description:

The timer is a self-contained (frame mounted) timer of the repeating cycle type. It is mounted on the lower 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 washers 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 360 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 sanitizing 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.

Timer operation can be observed after removing the machine's kickplate by loosening the two screws holding it.

If it is determined that the timer is defective, it is recommended that a new timer be installed. If a new timer is not
available, limited field maintenance can be accomplished by changing the micro switch.

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, properly tag them to assure proper replacement.

2. Remove the 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 edge.

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 timers 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.