Jackson 24-SN1 Service Manual

MODEL 24 B/BF

HIGH TEMPERATURE UNIT

NOVEMBER 1984

AFTER S/N 14389

BEFORE S/N 21800

INSTALLATION/OPERATION

and

SERVICE MANUAL

INCLUDES:

-Warranty Policy -Basic Functions of Dishwasher

-Installation Requirements -Maintenance and Care

-Operating Instructions -Wiring Diagrams

-Description of Components

801 AIRPARK CENTER DRIVE

NASHVILLE, TN

[phone]

1-800-736-8144

FAX[phone]

January 30,1998 7610-100-03-00 Rev A

MANUFACTURERS WARRANTY

ONE YEAR LIMITED PARTS & LABOR WARRANTY

ALL NEW JACKSON DISHWASHERS ARE WARRANTED TO THE ORIGINAL PURCHASER TO BE FREE FROM DEFECTS IN
MATERIAL OR WORKMANSHIP, UNDER NORMAL USE AND OPERATION FOR A PERIOD OF (1) ONE YEAR FROM THE DATE OF
PURCHASE, BUT IN NO EVENT TO EXCEED (18) EIGHTEEN MONTHS FROM THE DATE OF SHIPMENT FROM THE FACTORY.

Jackson MSC agrees under this warranty to repair or replace , at its discretion, any original part which fails under normal use due to faulty
material or workmanship during the warranty period, providing the equipment has been unaltered, and has been properly installed, main
tained and operated in accordance with the applicable factory instruction manual furnished with the machine and the failure is reported to the
authorized service agency within the warranty period. This includes the use of factory specified genuine replacement parts, purchased
directly from a Jackson authorized parts distributor or service agency. Use of generic replacement parts may create a hazard and void
warranty certification.

The labor to repair or replace such failed part will be paid by Jackson MSC, within the continental United States, Hawaii and Canada, during
the warranty period provided a Jackson MSC authorized service agency, or those having prior authorization from the factory, performs the
service. Any repair work by persons other than a Jackson MSC authorized service agency is the sole responsibility of the customer. Labor
coverage is limited to regular hourly rates, overtime premiums and emergency service charges will not be paid by Jackson MSC.

Accessory components not installed by the factory carry a (1) one year parts warranty only. Accessory components such as table limit
switches, pressure regulators, pre rinse unit s, etc. that are shipped with the unit and installed at the site are included. Labor to repair or
replace these components is not covered by Jackson MSC.

This warranty is void if failure is a direct result from shipping, handling, fire, water, accident, mi suse, acts of god, attempted repair by unau
thonzed persons, improper installation, if serial number has been removed or altered, or if unit is used for purpose other than it was originally
intended.

TRAVEL LIMITATIONS

Jackson MSC limits warranty travel time to (2) two hours and mileage to (100) one hundred miles. Jackson MSC will not pay for travel time
and mileage that exceeds this, or any fees such as those for air or boat travel without prior authorization.

WARRANTY REGISTRATION CARD
The warranty registration card supplied with the machine must be returned to Jackson MSC within 30 days to validate the warranty.
REPLACEMENT PARTS WARRANTY
Jackson replacement parts are warranted for a period of 90 days from the date of installation or 180 days from the date of shipment from the

factory, which ever occurs first.

PRODUCT CHANGES AND UPDATES
Jackson MSC reserves the right to make changes in design and specification of any equipment as engineering or necessity requires.

THIS IS THE ENTIRE AND ONLY WARRANTY OF JACKSON MSC. JACKSON'S LIABILITY ON ANY CLAIM OF ANY KIND, INCLUD ING
NEGLIGENCE, WITH RESPECT TO THE GOODS OR SERVICES COVERED HEREUNDER, SHALL IN NO CASE EXCEED THE PRICE
OF THE GOODS OR SERVICES OR PART THEREOF WHICH GIVES RISE TO THE CLAIM.

THERE ARE NO WARRANTIES, EXPRESSED OR IMPLIED, INCLUDING FOR FITNESS OR MERCHANTABILITY, THAT ARE NOT SET
FORTH HEREIN, OR THAT EXTEND BEYOND THE DURATION HEREOF. UNDER NO CIRCUMSTANCES WILL JACKSON MSC BE
LIABLE FOR ANY LOSS OR DAMAGE, DIRECT OR CONSEQUENTIAL, OR FOR THE DAMAGES IN THE NATURE OF PENALTIES,
ARISING OUT OF THE USE OR INABILITY TO USE ANY OF ITS PRODUCTS.

ITEMS NOT COVERED
This warranty does not cover adjustments to timer cams or thermostats, cleaning wash arms or strainers, or replacement of wear items such

as curtains, squeeze tubes, drain balls, door guides, or gaskets beyond 30 days from installation of unit. Also not covered are conditions
caused by the use of incorrect (non commercial) grade detergents, excessive supply water temperature or pressure, or hard water
conditions.

INDEX

TROUBLE SHOOTING GUIDE

22

FRONT VIEW

25

SPECIFICATIONS 2

ELECTRICAL RATING 2

GENERAL INSTRUCTIONS (Installation) 3

GENERAL INSTRUCTIONS (Operation) 6

GENERAL INSTRUCTIONS Preventive Maintenance) 7
REMOVAL of RINSE and/or WASH HEAD ASSEMBLIES (General Instructions) 8

DEFECTIVE TIMER MOTOR 11
FUNCTION OF SWITCHES, CIRCUIT BREAKER and INDICATING LIGHTS 12

REPLACEMENT OF SWITCHES la FRONT DOOR INTERLOCK SYSTEM 13

CHECKOUT 14

THERMOSTAT ADJUSTMENT 15

RINSE TANK HEATER SYSTEM 16

WASH TANK HEATER SYSTEM 18

WATER LEVEL CONTROL 19

SERVICE INSTRUCTIONS 20

REPLACING SEAL AND CERAMIC for PUMP SYSTEM 21
PICTORIALS

BACK VIEW 26

LEFT SIDE VIEW 27

RIGHT SIDE VIEW 28

PAN STRAINER, VACUUM BREAKER, OVERFLOW and INCOMING PLUMBING 29

RINSE TANK, WA SH ASSEMBLY. WASH OR RINSE THERMOSTAT. WASH or RINSE

THERMOMETER

PUMP and MOTOR ASSEMBLY 31

SWITCHES. DOOR SAFETY SWITCH and SAFETY SWITCH 32

DRAIN VALVE CUTAWAY VIEW and PANEL 33

WIRING DIAGRAMS 34

PARTS LIST 36

PARTS DISTRIBUTORS 38

30

SPECIFICATIONS

JACKSON DISHWASHER MODEL 24 B - BP

OPERATING CAPACITY 100% 248

Racks per hour 21
Dishes per hour 525

Glasses per hour 525

OPERATING CYCLE

Wash Time — seconds 120
Rinse Time — seconds 15

Total Cycle — seconds 150

WASH TANK CAPACITY (Gallons) 5.65
RINSE TANK CAPACITY (Gallons) 3
WASH PUMP CAPACITY (GPM) 60

WATER REQUIREMENTS 100%

Inlet Temperature F 140 deg.
Gallons per hour 52.3
Row Pressure, PSI 20
Row, gallons per minute 7.1
Inlet size — IPS 1/2"

Drain size — 0.0. 1 1/2"
WASH PUMP MOTOR (HP) 1/2
WASH HEATER (kw) 1.0

RINSE HEATER (kw) 5.0
ELECTRICAL REQUIREMENTS (See below for details, under Electrical Rating)

DIMENSIONS

Height with Top 36"

Height with no Top 34 1/2 "

Width 24"

Clearance, Wall to Machine 2 1/4"

Depth 24"

Maximum Height for Dishes 14"

Rack Size 19 3/4"
NOTE VENTED BACK

•ALL "F" MODELS ARE FREE STANDING (Top and Side Panels)

ELECTRICAL RATING

MODEL VOLTS CYCLE PHASE APPROX. TOTAL LOAD AMPS

24B 220 60 1 35 Refer to

248 208 60 1 35 Machine Data
248 208/220 50 1 28 Plate

Specifications subject to change without notice.

GENERAL INSTRUCTIONS

(INSTALLATION)

Note: Read the following instruction carefully. Proper Installation of your Jackson
Dishwasher will assure proper machine operation.

Uncrating 24:

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 add Installed on all AF and BF models. Cradle goes
around bottom; secure la place using liquid adhesive.

Installation Instructions:

1. The dishwasher can be leveled to the proper height by adjusting the adjustable feet on the four
comers. The front of the unit should be 1/4" to 1/2" higher than the back.

2. Refer to the 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" 00 tube size, 7"
from floor.

4. IMPORTANT-PLEASE READ-Located on the back upper left comer of this unit Is a steam
equalizing vent. This vent in no way should be blocked off or prevented from allowing steam to
be vented to the outside of the unit or from under the cabinet In which the unit Is Installed.
Never pipe the steam downward toward the floor. (SEE PAGE 4 IF BEING INSTALLED UNDER A
COUNTER.)

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

Installation of Model 24 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 24 table is a 6 foot length of 1/4 " thick x 1" wide sponge rubber
adhesive backed stripping.

Instructions for applying gasket:

1. Place one end of the tripping along the complete
side of the tog support flange and cut It off.

2. Repeat the same procedure along the other side.

3. Place the remaining piece along the front edge, fit
It In between the aide pieces and cut It to length.

4. Remove the backing and set the strips in place.

Instructions for Installation under a porous counter
top:

1. If possible, a hole should be cut through the
counter top directly above the equalizing vent. A
piece of 1 1/4" OD pipe Is then Inserted through
the hole into the vent opening and piped to the
outside.

2. If cutting a hole In the counter Is not possible,
then a piece of stainless steel 36" wide by 36"
long bend In the middle at 90 deg. should be
centered directly over the vent to allow the steam
to condensate on It when It comes out of the
vent.

3. It Is very Important that this vent be kept open and
cool air allowed to circulate around the unit.

Installation of Model 24 Dishwasher Under Dishtable:

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

2. A square rubber gasket #3 Is supplied and should be secured to top frame of dishwasher
with caulk or suitable adhesive.

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
pane l of machine until screws are tight

Removal of Pan Strainer for Cleaning: (Wash and rinse head assemblies must be removed prior to
removing strainer.)

1. Turn heat switch 'off' and drain machine by depressing drain switch for approximately 50
seconds.

2. Remove wing nut from rinse feed pipe, remove rinse head assembly by pulling forward.

3. Remove wing nut from upper pump housing, wash head may now be lifted out.

4. Pan strainer now accessible, lift out and dean thoroughly.

5. Clean around pump Intake with bristle brush.

6. Replace stainer pan.

7. Re -Install wash and rinse head assemblies.

8. Clean strainer pan daily or as needed to insure proper machine operation.

Installation of Wash Head and Rinse Ann Assemblies: (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.

RINSE ARM ASSEMBLE

1. Line up stud to match with slot In nipple.

2. Insert rinse arm assembly into female
recepticle protruding through back of
machine.

3. Insert lanyard pin to secure rinse arm
assembly properly.

4. Make certain end plugs are secured property

In rinse tubes.

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 with hose.

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

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

Note: Silverware In the upright position washes and rinses better than lying flat. These

silverware compartment racks an available through your dealer or Service Agency.

Operators Instructions:

1. Make sure dean pan strainer Is In place and slide empty rack In machine.

2. Place st art rocker switch In center position.

3. Close door and lock latch.

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

5. Turn heater switch on.

6. Open door and slide rack of dishes Into dishwasher.

7. Dispense proper amount of detergent In machine.

8. Start automatic wash and rinse cycle of dishwasher by pushing on top or bottom of start
switch (with indicating light): light will come on.

9. When light goes out, cycle has ended, Open door, slide out rack of clean dishes to air dry,
slide In rack of dirty dishes, add detergent, close door and push start switch.

10. At end of mealtime, shut off by placing start rocker switch In center position and heater
switch off, Drain machine by pressing top of drain switch approximately 50 seconds,
Remove pan strainer after removing lower rinse arm and wash head assembly. clean inside
of machine and replace clean strainer, wash head and lower rinse arm assembly. (See page
on Installation of Wash Head and Rinse Arm Assemblies — Removal of Pan Strainer for
Cleaning.)

Detergent Recommendations and Rinse Additives:
We suggest that you contact your local Detergent Specialist for the correct detergent and rinse

additives tor your area. To help you until one can be reached, we suggest that you use a non­foaming dishwasher detergent, approximately three tablespoons in wash tank when machine Is
filled and one teaspoon each cycle or load thereafter. This may have to be increased or
decreased to obtain satisfactory results.

GENERAL INSTRUCTIONS

(PREVENTIVE MAINTENANCE) (THE FOLLOWING IS TO BE

PERFORMED AS NEEDED.)

Note: Read the following Instructions carefully. Proper maintenance of your Jackcon

Dishwasher will ensure 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. Turn on the manual wash switch and allow to wash for five minutes.
d. Open door and examine the interior. All lime should be removed and parts should

be shiny. If not, allow to wash for longer period.
e. After the Interior Is dean, with door closed, empty the wash water by depressing

drain switch for approximately 50 seconds. Refill machine and allow to run for two

minutes, then again drain the wash reservoir.

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 to machine must be turned off for this
operation)
a. Remove plug and clean strainer.

4. Clean rinse tubes.
a. Remove rinse assembly by disconnecting rinse feed pipe and removing end plugs

on lower rinse.
b. Clean all rinse tubes and feed pipes with special brush supplied.
c. If spray holes in the rinse tubes are clogged, they may be cleaned with a pointed

object

5. Clean wash head assembly.
a. Loosen two wing nuts holding wash head assembly to pump.
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 and rinse assemblies. (See page with Instructions.)

6. Clean any deposits which may have built up on exterior moving parts.
a. Clean around door gaske t.
b. Using a soft bristle 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.

REMOVAL of RINSE and/or
WASH HEAD ASSEMBLIES

(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 holding the rinse feed pipe. When it is loose, pull the
feed pipe out of the nipple and lay It to one side.

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. Life and remove small manifold with short tubes. Put It In a safe place.

8. Remove 1/4" ball bearing In similar method to step 16.

9. Lift and remove large manifold with large length tubes similar 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 V
and no more than 1/4".

20. Replace the rinse assembly and pipe by aligning the stud on the feed pipe with the slot in

the nipple. Push the feed pipe in gently as far as It will go and then secure It with the wing
nut.

21. Close the front door and refill dishwasher.

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

necessary.

3. 0194004

WASH HEAD BEARING 1/4" S/S

7. 0193600

WASH HEAD FIXED RACE

9. 0109501

UPPER PUMP HOUSING

2. 0126800

RINSE HEAD END PLUGS

6. 0137301

RINSE FEED PIPE LANYARD PIN

ITEM P/N DESCRIPTION

1. 0186500 WASH HEAD CAP WITH RACE

2. 0187000 WASH HEAD CAP SET SCREW

4. 0189000

5. 0189500

WASH HEAD SMALL MANIFOLD
w/TUBES

WASH HEAD LARGE MANIFOLD
w/TUBES

ITEM P/N DESCRIPTION

6. 0187500 WASH HEAD CENTER SHAFT

8. 0188600 WASH HEAD SHAFT HOLDING PIN

10. 0189805

WASH HEAD ASSEMBLY RETAINING
PIN w/RING

ITEM P/N DESCRIPTION

1. 0125200 RINSE HEAD ARM

3. 0126000 RINSE HEAD NYLATRON WASHER

4. 0125500 RINSE HEAD HEX BRUSHING S/S

ITEM P/N DESCRIPTION

5. 0126500 RINSE HEAD SNAP RINGS S/S

7.

8. 0137202 RINSE FEED PIPE NIPPLE

6137200 RINSE FEED PIPE (LOWER)

TIMER for MODEL 24

DISHWASHERS

General Description

The timer is a self-contained (frame mounted) timer of the repeating cycle type. It is mounted on
the control panel of Jackson Automatic Dishwashing Machines, to control the automatic
functions of these-machines. It consists of a dock motor which operates on 60 cycle, AC,
110VAC or 50 cycle, AC, 220VAC. In addition to the dock motor, the timer also contains a driven
cam arrangement which operates three 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 300 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 middle
micro switch controls the wash and uses the NO contact. The micro switch farthest away from
the timer motor controls the rinse 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 on the switch 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 If one function of the timer Is being executed
all the time or If there Is an 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 two 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

½ of Its edge raised; center cam has 2 large depressed areas; cam furthest from timer
motor has two smaller depressed areas.

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.