Jackson 24-SN2 Service Manual

MODEL 24 B/BF

INSTALLATION/OPERATION and

HIGH TEMPERATURE UNIT

SEPTEMBER 1986

AFTER S/N 21800

SERVICE MANUAL

INCLUDES:

-Warranty Policy -Basic Functions of Dishwasher

-Installation Requirements -Maintenance and Care

-Operating Instructions -Wiring Diagrams

-Description of Components

INDEX

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

TIMERforMODEL24 DISHWASHERS

10

DEFECTIVETIMER MOTOR

11

FUNCTION of SWITCHES, CIRCUIT BREAKER

THERMOSTAT ADJUSTMENT

13

RINSETANK HEATER SYSTEM

14

WASH TANK HEATER SYSTEM

16

WATER LEVELCONTROL

17

SERVICE INSTRUCTIONS (Incoming WaterSolenoid Valve)

18

SEAL and CERAMIC for PUMP SYSTEM

BACKVIEW

24

LEFTSIDEVIEW

25

RIGHTSIDEVIEW

26

PAN STRAINER, VACUU

M BREAKER, DOOR SWITCH

RINSE TANK, WASH ASSEMBLY, WASH or RINSE

BOOSTER TANK HEATER ELEMENT, ELEMENT

PUMP and MOTOR ASSEMBLY

30

DRAIN VALVE, CUTAWAY VIEW, PANEL

31

WIRING DIAGRAMS

32

PARTS DISTRIBUTORS Inside Back Cover

WARRANTY Inside Front Cover

(General Instructions) 8

and INDICATING LIGHTS 12

(General Information) 19
TROUBLE SHOOTING GUIDE 20

PICTORIALS:
FRONTVIEW 23

and LATCH ASSEMBLY, INCOMING PLUMBING 27
THERMOSTAT WASH or RINSE THERMOMETER 28
GASKET, THERMOSTATIC OVERLOAD 29

TIMINGCHART 34
COMPLETE PARTS LIST forMODEL24 35

SPECIFICATIONS

JACKSON DISHWASHER MODEL 24 B - BF*

OPERATING CAPACITY 100% 24 24 B
Racks per hour 21 21
Dishes per hour 525 525

Glasses per hour 525 525
OPERATING CYCLE

Wash Time — seconds 121 121
Rinse Time — seconds 15 15

Total Cycle — seconds 145 145
WASH TANK CAPACITY (Gallons) 5.65 5.65

RINSE TANK CAPACITY (Gallons) N/A 3
WASH PUMP CAPACITY (GPM) 60 60

WATER REQUIREMENTS 100%
Inlet Temperature °F 180° 140°

Gallons per hour 52.3 52.3
Flow Pressure, PSI 20 20
Flow, gallons per minute 7.1 7.1
Inlet size— IPS

Drain size — O.D.

WASH PUMP MOTOR (HP)
WASH HEATER (kw) 1.0 1.0

RINSE HEATER (kw) N/A 6.2

ELECTRICAL REQUIREMENTS (See below for details, under Electrical Rating)
DIMENSIONS

Height, with Top
Height, with no Top
Width
Clearance, Wall to Machine
Depth
Maximum Height for Dishes

Rack Size

1/2"
1 1/2 "

1/2 1/2

19

V2"
1/2"

36"
34 1/2"
24"
2 1/4"
24"
14"

3

3/4"

NOTE VENTED BACK ALL 'F' MODELS ARE FREE STANDING (Top and Side
Panels)

ELECTRICAL RATING

MODEL VOLTS CYCLE PHASE TOTAL LOAD AMPS
24B 115/208-230 60 1
24 115 60 1

38
16

GENERAL INSTRUCTIONS

(INSTALLATION)

Note: Read the following instructions 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 installat ion.

Note: NSF base cradle installation must be field installed on all AF and BF models. Cradle goes
around bottom; secure in place using liquid adhesive.

Installation Instructions:

1. The dishwasher can be leveled to the proper height by adjusting the adjustable feet on the four corners.
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 1/2" OD tube size, 7" from floor.

4. IMPORTANT-PLEASE READ-Located on the back upper left corner 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 L1, 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 stripping along the
complete side of the 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, fit it in between the side 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 1/4" 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° 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 panel 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 clean 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 Arm 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 ASSEMBLY

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

2. Insert rinse arm assembly into female receptical protrudeing through back of
machine.

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

4. Make certain end plugs are secured properly 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 in 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 are available through your dealer or Service Agency.

24B/BF Operating Instructions:

1. Install pan strainer and the wash and rinse arms. Insert an empty rack, close the door
and push till the handle latches.

2. Push the on/fill-off/drain switch to the up "on/fill" position. The machine power light
will come on and so will the rinse heaters. The machine will begin to fill automatically
and stop by itself.

3. After the machine has completed filling, open the door and put in a rack of soiled
dishes and close the door (the machine door must remain open for a minimum of 5
seconds to allow the timer to reset.)

4. After the door has been closed, the cycle light will come on. There will be a 4 second
delay before the wash cycle begins.

5. The machine will wash for 120 seconds and rinse for 15 seconds. After the cycle has
finished, the cycle light will go out.

6. Open the door and remove the sanitized dishes. The machine is ready for another
cycle.

7. To manually wash, push the manual wash switch to the up "on" position. The machine
will wash indefinitely. This function can also be used as a delime. To resume normal
operation, push the manual wash switch to the down "off" position.

8. To drain the machine, close the door and latch. Push the on/fill-off/drain switch to the
"off/drain" position. This must done within 4 seconds after closing the door or else the
machine will begin another normal cycle.

9. After machine has drained, the cycle light will remain on for 1 minute and 30 seconds.
This allows the timer to reset for the next meal period.

10. Open the door, remove and clean the pan strainer and wash arm.

11. Wash heater protection is provided by two means. Primary protection is given by the
water level control which senses the water level with a probe. If this should fail due to
excessive build up on the probe, the secondary thermal protection will cut out the wash
heater before damage occurs.

12. When the secondary heater protection has been used, it will be indicated by the
illuminated red reset light. The following steps are necessary in this situation:

a. Turn off power supply.
b. Open the door and remove the wash and rinse arms and the pan strainer.

c. Locate the two probes. One is in the wash sump on the left hand side and the other

is on the front of the wash tub under the probe cover.
d. Using a deliming compound and a brush, clean both probes.
e. Reinstall the wash and rinse arms and the pan strainer.
f. Push the reset button located above the reset light.
g. Push on/fill-off/drain switch to the "on/fill" position. The machine should begin to
fill. If it does not and the reset light comes on again, call an authorized service
agency.

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 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 Jackson

Dishwasher will ensure optimum service with a minimum of down ti me.

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 clean, with door closed, empty the wash water by turning switch to

the "off/drain" position. 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. Remove pin 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 gasket.
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. Drain unit by placing switch in the off/drain position.

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

3. Remove the pin holding the rinse feed pipe. Pull the feed pipe out of the nipple and lay
it to one side.

4. Remove wash head assembly by pulling out the holding pin and lifting assembly. Place
the wash head on a table for disassembly.

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

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

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

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

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

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

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 V1/4" 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 V* 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 1/2" and no more than 1/4" .

20. Replace wash head assembly and rinse arm.

21. Close the front door and refill dishwasher.

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

4.

8.

ITEM P/N

1. 0186500 WASH HEAD CAP WITH RACE 6. 0187500 WASH HEAD CENTER SHAFT

2. 0187000 WASH HEAD CAP SET SCREW 7. 0193601 WASH HEAD FIXED RACE

3. 0194000 WASH HEAD BEARING 1/4" S/S 8. 0109600 UPPER PUMP HOUSING

4. 0189000 WASH HEAD SMALL MANIFOLD 9. 0189805 WASH HEAD ASSEMBLY
w/TUBES RETAINING PIN w/RING

5. 0189500 WASH HEAD LARGE MANIFOLD
w/TUBES

DESCRIPTION ITEM P/N DESCRIPTION

ITEM P/N DESCRIPTION ITEM P/N

1. 0125200 RINSE HEAD ARM 5. 0126500 RINSE HEAD SNAP RINGS S/S

2. 0126800 RINSE HEAD END PLUGS 6. 0137301 RINSE FEED PIPE LANYARD PIN

3.

0126000
0125500

RINSE
RINSE

HEAD
HEAD

NYLATRON WASHER
HEX BRUSHING S/S

7.

0137200
0137202

RINSE
RINSE

DESCRIPTION

FEED PIPE (LOWER) FEED
PIPE NIPPLE

TIMER for MODEL 24

DISHWASHERS

General Description:

The timer is a self-contained (frame mounted) timer of the repeating cycle type. It is mounted to the
control panel of Jackson Automatic Dishwashing Machines, to control the automatic functions of these
machines. It consists of a clock motor which operates on 60 cycle, AC, 110VAC. In addition to the clock
motor, the timer also contains a driven cam arrangement which operates six 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 150 seconds, allowing one wash and one
rinse operation for each complete revolution of the cam shaft.

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, determine which micro switch or if motor is defective. The
motor and the micro switches are easily changed.

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. Push upward on micro switch terminals (away from cams) until actuator button shows.

2. Pull micro switch straight out.

3. Replace, wire for wire, with new micro switch.

4. Replacing micro switch into timer is simply a reverse of steps 1 and 2.
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

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 door 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.

TYPICAL TIMER SWITCH P/N 0177500

TIMER

P/N 0174200 (110V, 60 cycle)