Jackson Dishwasher JP 24 User Manual
HOT WATER SANITIZING UNDERCOUNTER DISHMACHINES  
TECHNICAL MANUAL  
INSTALLATION MANUAL FOR EXPORT UNITS  
SERVICE MANUAL FOR DOMESTIC UNITS  
FOR JACKSON MODELS:  
JP-24  
JP-24F  
JP-24B  
JP-24BF  
An  
Company  
Jackson MSC, Inc.  
P.O. BOX 1060  
HWY. 25E  
BARBOURVILLE, KY. 40906  
FAX (606) 523-9196  
PHONE (606) 523-9795  
www.jacksonmsc.com  
March 6, 2006  
P/N 7610-002-49-79 (Revision D)  
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REVISION  
DATE  
MADE APPLICABLE  
REVISION  
DETAILS  
Release manual for service use.  
BY  
ECN  
A
B
C
07-15-2002  
06-04-2003  
02-11-2004  
MAW  
6527  
6673, 6681  
6637  
MAW  
MAW  
Updated per ecns.  
Updated per ecns.  
6836  
Change thermostat from 05930-121-71-29 to 05930-510-03-79.  
Change thermostat from 05930-121-71-36 to 05930-011-49-43.  
7421, 7231 Change Diverter Valve Assembly number from 05700-002-23-21  
6964, 7095 to 06410-012-23-21 & Diverter Valve Assembly 05700-002-23-22  
to 06401-022-23-21. Replace 04820-300-07-00 vacuum breaker  
with 04820-003-06-13.  
D
03-06-2006  
MAW  
i
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NOMENCLATURE FOR THE MODELS COVERED IN THIS MANUAL  
JP-24B  
JP-24 = Undercounter, high temperature, hot water sanitizing, no booster tank.  
JP-24F = Undercounter, high temperature, hot water sanitizing, no booster tank, with top and side panels.  
JP-24B = Undercounter, high temperature, hot water sanitizing, with a booster tank.  
JP-24BF = Undercounter, high temperature, hot water sanitizing, with a booster tank, with top and side panels.  
Jackson MSC Inc. provides technical support for all  
of the dishmachines detailed in this manual. We  
Model:  
strongly recommend that you refer to this manual  
before making a call to our technical support staff.  
Please have this manual with you when you call so  
that our staff can refer you, if necessary, to the prop-  
er page. Technical support is available from 8:00  
a.m. to 5:00 p.m. (EST), Monday through Friday.  
Technical support is not available on holidays.  
Contact technical support toll free at 1-888-800-  
5672. Please remember that technical support is  
available for service personnel only.  
Serial No.:  
Installation Date:  
Service Rep. Name:  
Phone No.:  
ii  
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TABLE OF CONTENTS  
SECTION  
I.  
DESCRIPTION  
PAGE  
SPECIFICATION INFORMATION  
Specifications JP-24/JP-24F  
Specifications JP-24B/JP-24BF  
Dimensions  
2
3
4
II.  
INSTALLATION/OPERATION INSTRUCTIONS  
Installation Instructions  
6
7
Electrical Installation Instructions  
Operation Instructions  
8
Detergent Control  
9
Cycle Counter Retrofit Kit Instructions  
10  
III.  
PREVENTATIVE MAINTENANCE  
Preventative Maintenance  
12  
14  
IV.  
TROUBLESHOOTING  
V.  
SERVICE PROCEDURES  
Rinse Solenoid Valve Repair Parts Kit  
Vacuum Breaker Repair Parts Kit  
Replacing the Pump Motor/Booster Tank Heater  
Replacing the Drain Valve  
17  
21  
23  
24  
25  
Rinse Regulating Thermostat Replacement  
VI.  
PARTS SECTION  
Gauge Panel Assembly  
30  
31  
32  
32  
34  
34  
37  
38  
39  
40  
Electrical Panel Assembly (JP-24/F 208-240 Volt, 50/60Hz)  
Electrical Panel Assembly (JP-24B/BF 208-240 Volt, 50/60Hz)  
Electrical Panel Assembly (JP-24B/BF 460 Volt, 60Hz)  
Gauge Panel Assembly (Used with the external mounted control panel assemblies)  
Electrical Panel Assembly (External & AMTRAK Option)  
Kick Plate Assembly  
Incoming Plumbing Assembly (JP-24/JP-24F)  
Incoming Plumbing Assemblies(JP-24B/JP-24BF)  
Rinse Stiffener/Rinse Hub Weldment  
Solenoid Valve Repair Kit/Vacuum Breaker Repair Kit/Water Pressure Regulator Kit (WPRK Option) 41  
Drain Valve Assembly  
Drain Plumbing Assembly  
42  
43  
44  
45  
46  
47  
48  
49  
50  
Wash Motor to Wash Tub Assembly  
Rinse Tank & Components/Wash Heater Kit  
Door Assembly  
Miscellaneous Door Sub-Assemblies  
Rinse Arm & Wash Arm Assemblies  
Frame, Shroud, & Panel Components/Miscellaneous Parts  
Cycle Counter Retrofit Kit  
VII.  
SCHEMATICS  
JP-24/JP-24F 208/230 V, 50/60 HZ, single phase  
JP-24B/JP-24BF 208/230 V, 50/60 HZ, single phase  
JP-24B/JP-24BF 460 V, 60 HZ, three phase  
52  
53  
54  
JP-24 Technical Manual 7610-002-49-79 Rev. D  
Issued: 03-06-2006 Revised: N/A  
iii  
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SECTION 1:  
SPECIFICATION INFORMATION  
1
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SECTION 1: SPECIFICATION INFORMATION  
SPECIFICATIONS of the JP-24/JP-24F  
ELECTRICAL REQUIREMENTS  
PERFORMANCE/CAPABILITIES  
OPERATING CAPACITY (RACKS/HOUR)  
RACKS PER HOUR  
WASH MOTOR HP  
3/4  
30  
NOTE: Typical Electrical Circuit is based upon (1) 125% of the  
full amperage load of the machine and (2) typical fixed-trip cir-  
cuit breaker sizes as listed in the NEC 2002 Edition. Local  
codes may require more stringent protection than what is dis-  
played here. Always verify with your electrical service con-  
tractor that your circuit protection is adequate and meets all  
applicable national and local codes. These numbers are pro-  
vided in this manual simply for reference and may change  
without notice at any given time.  
DISHES PER HOUR  
600  
600  
GLASSES PER HOUR  
OPERATING CYCLE (SECONDS)  
WASH TIME  
82  
28  
10  
2
DRAIN TIME  
RINSE TIME  
JP-24/JP-24F:  
TOTAL CYCLE TIME (MINUTES)  
RINSE  
HEATER  
RATINGS  
TYPICAL  
ELECTRICAL  
CIRCUIT  
TOTAL  
AMPS  
5 MINUTE TIMER OPERATING CYCLE (SECONDS)  
WASH TIME  
VOLTS PH HZ  
262  
28  
10  
5
208  
230  
1
1
50  
50  
900KW  
1100KW  
12  
12  
15 AMP  
15 AMP  
DRAIN TIME  
208  
230  
1
1
60  
60  
900KW  
1100KW  
10  
10  
15 AMP  
15 AMP  
RINSE TIME  
TOTAL CYCLE TIME (MINUTES)  
NOTE: Always refer to the machine data plate for specific  
electrical and water requirements. The material provided on  
this page is for reference only and may be subject to change  
without notice.  
TANK CAPACITY (LITERS) (GALLONS)  
WASH TANK  
(21.5) 5.65  
TEMPERATURES  
WASH --- (MINIMUM)  
RINSE --- (MINIMUM)  
(65.6°C) 150°F  
(82.2°C) 180°F  
WATER REQUIREMENTS  
INLET TEMPERATURE  
(82.2°C) 180°F  
(198.7L) 52.3  
(1.27 cm) 1/2”  
(3.81 cm) 1 1/2”  
20±5  
GALLONS PER HOUR  
WATER LINE SIZE I.P.S. (Minimum)  
DRAIN LINE SIZE I.P.S. (Minimum)  
FLOW PRESSURE P.S.I.  
FLOW, GALLONS PER MINUTE  
(27L) 7.1  
JP-24 Technical Manual 7610-002-49-79 Rev. D  
Issued: 03-06-2006 Revised: N/A  
2
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SECTION 1: SPECIFICATION INFORMATION  
SPECIFICATIONS of the JP-24B/JP-24BF  
PERFORMANCE/CAPABILITIES  
ELECTRICAL REQUIREMENTS  
OPERATING CAPACITY (RACKS/HOUR)  
RACKS PER HOUR  
WASH MOTOR HP  
3/4  
30  
NOTE: Typical Electrical Circuit is based upon (1) 125% of the  
full amperage load of the machine and (2) typical fixed-trip cir-  
cuit breaker sizes as listed in the NEC 2002 Edition. Local  
codes may require more stringent protection than what is dis-  
played here. Always verify with your electrical service con-  
tractor that your circuit protection is adequate and meets all  
applicable national and local codes. These numbers are pro-  
vided in this manual simply for reference and may change  
without notice at any given time.  
DISHES PER HOUR  
600  
600  
GLASSES PER HOUR  
OPERATING CYCLE (SECONDS)  
WASH TIME  
82  
28  
10  
2
DRAIN TIME  
RINSE TIME  
TOTAL CYCLE TIME (MINUTES)  
RINSE  
TYPICAL  
ELECTRICAL  
CIRCUIT  
50 AMP  
60 AMP  
60 AMP  
HEATER  
RATINGS  
6.7KW  
8.2KW  
8.2KW  
TOTAL  
AMPS  
40  
43  
47  
VOLTS PH HZ  
5 MINUTE TIMER OPERATING CYCLE (SECONDS)  
WASH TIME  
208  
230  
208  
230  
220  
1
1
1
1
1
50  
50  
50  
50  
50  
262  
28  
10  
5
DRAIN TIME  
10KW  
9.15KW  
51  
48  
70 AMP  
60 AMP  
RINSE TIME  
208  
230  
208  
230  
460  
460  
1
1
1
1
1
1
60  
60  
60  
60  
60  
60  
6.7KW  
8.2KW  
8.2KW  
10KW  
480/8.2KW  
480/9.6KW  
39  
46  
42  
50  
11  
14  
50 AMP  
60 AMP  
60 AMP  
70 AMP  
15 AMP  
20 AMP  
TOTAL CYCLE TIME (MINUTES)  
TANK CAPACITY (LITERS) (GALLONS)  
WASH TANK  
RINSE TANK  
(21.5) 5.65  
(11.4) 3  
NOTE: Always refer to the machine data plate for specific  
electrical and water requirements. The material provided on  
this page is for reference only and may be subject to change  
without notice.  
TEMPERATURES  
WASH --- (MINIMUM)  
RINSE --- (MINIMUM)  
(65.6°C) 150°F  
(82.2°C) 180°F  
WATER REQUIREMENTS  
INLET TEMPERATURE (40° Booster Heater) (82.2°C) 140°F  
INLET TEMPERATURE (70° Booster Heater) (43.3°C) 110°F  
GALLONS PER HOUR  
(198.7L) 52.3  
(1.27 cm) 1/2”  
(3.81 cm) 1 1/2”  
20±5  
WATER LINE SIZE I.P.S. (Minimum)  
DRAIN LINE SIZE I.P.S. (Minimum)  
FLOW PRESSURE P.S.I.  
FLOW, GALLONS PER MINUTE  
(27L) 7.1  
JP-24 Technical Manual 7610-002-49-79 Rev. D  
Issued: 03-06-2006 Revised: N/A  
3
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SECTION 1: SPECIFICATION INFORMATION  
JP-24 DIMENSIONS  
2 1/2” (6.4 cm) Min. Wall Clearance  
LEGEND  
A - Water Inlet 1/2” ID Female Pipe Thread, 2 1/2”  
AFF  
B - Detergent Feeder Connection  
C - Electrical Connection  
D - Drain Connection Flexible Hose 6’ Free  
Length,  
1” ID x 1 3/8” OD  
E - Rinse Additive Connection  
E
12”  
19”  
(30.5 cm)  
(48.3 cm)  
22 5/8”  
(57.5 cm)  
A
C
16 3/4”  
(42.5 cm)  
DOOR OPEN  
6 1/2”  
(16.5 cm)  
24 1/4”  
(61.6 cm)  
D
E
4 1/2”  
(11.4 cm)  
B
33 1/4”  
(84.5 cm)  
C
13 1/4”  
(33.7 cm)  
A
8 1/2”  
(21.6 cm)  
3 3/4” (9.5 cm)  
2 3/4” (7 cm)  
4 1/4”  
(10.8 cm)  
2 1/2”  
(6.47 cm)  
DIMENSIONS  
Height (minimum):  
Height (maximum):  
Width:  
Depth:  
33 1/4” (84.5 cm)  
34 1/4” (87 cm)  
24” (60.9 cm)  
22 5/8” (57.5 cm)  
2 1/2” (6.4 cm)  
Inside Clearance Height:  
Inside Clearance Width:  
Inside Clearance Depth:  
Door Open Depth:  
14 1/2” (36.8 cm)  
20 1/4” (51.4 cm)  
21 1/4” (54 cm)  
39 1/2” (100.3 cm)  
Wall Clearance (minimum):  
*All dimensions are for reference only and are subject to change without notice.  
JP-24 Technical Manual 7610-002-49-79 Rev. D  
Issued: 03-06-2006 Revised: N/A  
4
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SECTION 2:  
INSTALLATION/OPERATION  
INSTRUCTIONS  
5
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SECTION 2: INSTALLATION/OPERATION INSTRUCTIONS  
INSTALLATION INSTRUCTIONS  
VISUAL INSPECTION: Before installing the unit, check the container and machine for damage. A damaged container is an indi-  
cator that there may be some damage to the machine. If there is damage to both the container and machine, do not throw away  
the container. The dishmachine has been inspected and packed at the factory and is expected to arrive to you in new, undam-  
aged condition. However, rough handling by carriers or others may result in there being damage to the unit while in transit. If  
such a situation occurs, do not return the unit to Jackson; instead, contact the carrier and ask them to send a representative to  
the site to inspect the damage to the unit and to complete an inspection report. You must contact the carrier within 48 hours of  
receiving the machine. Also, contact the dealer through which you purchased the unit.  
UNPACKING THE DISHMACHINE: Once the machine has been removed from the container, ensure that there are no miss-  
ing parts from the machine. This may not be obvious at first. If it is discovered that an item is missing, contact Jackson imme-  
diately to have the missing item shipped to you.  
LEVEL THE DISHMACHINE: The dishmachine is designed to operate while being level.  
This is important to prevent any damage to the machine during operation and to ensure the  
best results when washing ware. The unit comes with adjustable bullet feet, which can be  
turned using a pair of channel locks or by hand if the unit can be raised safely. Ensure that  
the unit is level from side to side and from front to back before making any connections.  
Adjustable Bullet Foot  
PLUMBING THE DISHMACHINE: All plumbing connections must comply with all applica-  
ble local, state, and national plumbing codes. The plumber is responsible for ensuring that  
the incoming water line is thoroughly flushed prior to connecting it to any component of the  
dishmachine. It is necessary to remove all foreign debris from the water line that may poten-  
tially get trapped in the valves or cause an obstruction. Any valves that are fouled as a result  
of foreign matter left in the water line, and any expenses resulting from this fouling, are not  
the responsibility of the manufacturer.  
Drain Hose  
CONNECTING THE DRAIN LINE: The JP-24 series machines are a pumped (pressure)  
drain capable of pumping waste water to a height of 24 inches from the floor to the kitchen’s  
drain system. The dishmachines are supplied with a 10 foot long hose that extends from the  
rear side of the machine. There must also be an air gap between the machine drain line and  
the floor sink or drain. If a grease trap is required by code, it should have a flow capacity of  
12 gallons (45.6 Liters) per minute.  
WATER SUPPLY CONNECTION: Ensure that you have read the section entitled “PLUMB-  
ING THE DISHMACHINE” above before proceeding. Install the water supply line (1/2” ID  
pipe size minimum) to the dishmachine line y-strainer using copper pipe. It is recommend-  
ed that a water shut-off valve be installed in the water line between the main supply and the  
machine to allow access for service. The water supply line is to be capable of 20±5 PSI  
“flow” pressure at the recommended temperature indicated on the data plate.  
Back of Machine Showing Drain Hose  
Do to areas where the water pressure fluctuates or is greater than the recommended pres-  
sure, it is recommended installing a water pressure regulator. Do not confuse static pressure  
with flow pressure. Static pressure is the line pressure in a “no flow” condition (all valves and  
services are closed). Flow pressure is the pressure in the fill line when the fill valve is  
opened during the cycle.  
It is also recommended that a shock absorber (not supplied) be installed in the incoming  
water line. This prevents line hammer (hydraulic shock), induced by the solenoid valve as it  
operates, from causing damage to the equipment.  
Incoming Plumbing Y-Strainer  
PLUMBING CHECK: Slowly turn on the water supply to the machine after the incoming fill  
line and the drain line have been installed. Check for any leaks and repair as required. All  
leaks must be repaired prior to placing the machine in operation.  
JP-24 Technical Manual 7610-002-49-79 Rev. D  
Issued: 03-06-2006 Revised: N/A  
6
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SECTION 2: INSTALLATION/OPERATION INSTRUCTIONS  
ELECTRICAL INSTALLATION INSTRUCTIONS  
ELECTRICAL POWER CONNECTION: Electrical and grounding connections must comply with the applicable portions of the  
National Electrical Code ANSI/NFPA 70 (latest edition) and/or other electrical codes.  
Disconnect electrical power supply and place a tag at the disconnect switch to indicate that you are working on the circuit.  
The dishmachine data plate is located on the front of the machine. Refer to the data plate for machine operating requirements,  
machine voltage, total amperage load and serial number.  
Ground Lug  
Terminal Block  
To install the incoming power lines, remove the kick panel. This will require tak-  
ing a phillips head screwdriver and removing the two screws at the bottom of  
the kick panel; open the door slightly while carefully lifting the kick panel up and  
out of the way. Install 3/4” conduit into the pre-punched holes in the back of the  
control box. Route power wires and connect to power block and grounding lug.  
Install the service wires (L1 and L2) to the appropriate terminals as they are  
marked on the terminal block. Install the grounding wire into the lug provided.  
It is recommended that “DE-OX” or another similar anti-oxidation agent be  
used on all power connections.  
VOLTAGE CHECK: Ensure that the power switch is in the OFF position and  
apply power to the dishmachine. Check the incoming power at the terminal  
block and ensure it corresponds to the voltage listed on the data plate. If not,  
contact a qualified service agency to examine the problem. Do not run the dish-  
machine if the voltage is too high or too low. Shut off the service breaker and  
mark it as being for the dishmachine. Advise all proper personnel of any prob-  
lems and of the location of the service breaker. Replace the control box cover  
and tighten down the screws.  
Control Box Electrical Connection  
CHEMICAL CONNECTIONS: All chemical hookup loca-  
tions are located on the back of the dishmachine. Please  
Brass Plug  
refer to the drawing at the right for the correct connection  
point.  
Rinse Aid Fitting  
Detergent Fitting  
Back of Unit Showing Chemical Connection Points  
JP-24 Technical Manual 7610-002-49-79 Rev. D  
Issued: 03-06-2006 Revised: N/A  
7
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SECTION 2: INSTALLATION/OPERATION INSTRUCTIONS  
OPERATION INSTRUCTIONS  
PREPARATION: Before proceeding with the start-up of the unit, verify the following:  
1. The strainer is in place and is clean.  
2. That the wash and rinse arms are screwed securely into place and that their endcaps are tight. The wash and rinse  
arms should rotate freely.  
POWER UP: To energize the unit, turn on the power at the service breaker. The voltage should have been previously verified  
as being correct. If not, the voltage will have to be verified.  
FILLING THE WASH TUB:For the initial fill, close the door and depress the ON/FILL-OFF/DRAIN rocker switch in the ON posi-  
tion. The machine will run a partial cycle and fill to the factory preset level. Open the door and verify that the water level is  
correct. Hereafter, the water level is controlled by the timer that has been preset at the factory. Verify that there are no other  
leaks on the unit before proceeding any further. The wash tub must be completely filled before operating the wash pump to pre-  
vent damage to the component. Once the wash tub is filled, the unit is ready for operation.  
NOTE: This applies to units with integral booster heaters. Make sure the orange wires at the heater contactor are con-  
nected properly. They have been purposely disconnected at the factory to avoid damage to the heater element when  
there is no water in the booster heater.  
The machine runs a complete cycle to drain and fill. If the machine is not allowed to drain, the water will build up inside the tub.  
After the initial fill, the rinse water for the current cycle will become the wash water for the next cycle.  
WARE PREPARATION: Proper preparation of ware will help ensure good results and less re-washes. If not done properly, ware  
may not come out clean and the efficiency of the dishmachine will be reduced. It is important to remember that a dishmachine  
is not a garbage disposal and that simply throwing unscraped dishes into the machine simply defeats the purpose altogether  
of washing the ware. Scraps should be removed from ware prior to being loaded into a rack. Pre-rinsing and pre-soaking are  
good ideas, especially for silverware and casserole dishes. Place cups and glasses upside down in racks so that they do not  
hold water during the cycle. The dishmachine is meant not only to clean, but to sanitize as well, to destroy all of the bacteria  
that could be harmful to human beings. In order to do this, ware must be properly prepared prior to being placed in the machine.  
DAILY MACHINE PREPARATION: Refer to the section entitled “PREPARATION” at the top of this page and follow the instruc-  
tions there. Afterwards, check that all of the chemical levels are correct and/or that there is plenty of detergent available for the  
expected workload.  
WARM-UP CYCLES: For a typical daily start-up, it is recommended to run the machine through 3 cycles to ensure that all of  
the cold water is out of the system and to verify that the unit is operating correctly. To cycle the machine, ensure that the power  
is on and that the tub has filled to the correct level. Open the door and the cycle light will illuminate.  
When the light goes out, close the door, the unit will start, run through the cycle, and shut off automatically. Repeat this two  
more times. The unit should now be ready to proceed with the washing of ware.  
WASHING A RACK OF WARE: To wash a rack, open the door completely and slide the rack into the unit. Close the door and  
the unit will start automatically. Once the cycle is completed, open the door and remove the rack of clean ware. Replace with  
a rack of soiled ware and close the door. The process will then repeat itself.  
OPERATIONAL INSPECTION: Based upon usage, the pan strainer may become clogged with soil and debris as the workday  
progresses. Operators should regularly inspect the pan strainer to ensure it has not become clogged. If the strainer does, it will  
reduce the washing capability of the machine. Instruct operators to clean out the pan strainer at regular intervals or as required  
by work load.  
SHUTDOWN AND CLEANING: At the end of the workday, close the door. Start a cycle, then place the ON/FILL - OFF/DRAIN  
SWITCH to the “ OFF/DRAIN” position. The unit will automatically drain and turn off. Once the wash tub is drained, remove he  
pan strainer. Remove soil and debris from the strainer and set to the side. Unscrew the wash and rinse arms from their mani-  
folds. Remove the endcaps and flush the arms with water. Use a brush to clean out the inside of the arms. If the nozzles appear  
to be clogged, use a toothpick to remove the obstruction. Wipe the inside of the unit out, removing all soil and scraps.  
Reassemble the wash and rinse arms and replace them in the unit. The arms only need to be hand tight, do not use tools to  
tighten them down. Reinstall the strainer and close the door.  
JP-24 Technical Manual 7610-002-49-79 Rev. D  
Issued: 03-06-2006 Revised: N/A  
8
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SECTION 2: INSTALLATION/OPERATION INSTRUCTIONS  
DETERGENT CONTROL  
Detergent usage and water hardness are two factors that contribute greatly to how efficiently your dishmachine will operate.  
Using detergent in the proper amount can become, in time, a source of substantial savings. A qualified water treatment spe-  
cialist can tell you what is needed for maximum efficiency from your detergent, but you should still know some basics so you’ll  
understand what they are talking about.  
First, you must understand that hard water greatly effects the performance of the dishmachine. Water hardness is the amount  
of dissolved calcium and magnesium in the water supply. The more dissolved solids in the water, the greater the water hard-  
ness. Hard water works against detergent, thereby causing the amount of detergent required for washing to increase. As you  
use more detergent, your costs for operating the dishmachine will increase and the results will decrease. The solids in hard  
water also may build-up as a scale on wash and rinse heaters, decreasing their ability to heat water. Water temperature is  
important in removing soil and sanitizing dishes. If the water cannot get hot enough, your results may not be satisfactory. This  
is why Jackson recommends that if you have installed the machine in an area with hard water, that you also install some type  
of water treatment equipment to help remove the dissolved solids from the water before it gets to the dishmachine.  
Second, hard water may have you adding drying agents to your operating cycle to prevent spotting, when the real problem is  
deposited solids on your ware. As the water evaporates off of the ware, the solids will be left behind to form the spotting and  
no amount of drying agent will prevent this. Again, using treated water will undoubtedly reduce the occurrences of this prob-  
lem.  
Third, treated water may not be suitable for use in other areas of your operation. For instance, coffee made with soft water may  
have an acid or bitter flavor. It may only be feasible to install a small treatment unit for the water going into the dishmachine  
itself. Discuss this option with your qualified water treatment specialist.  
Even after the water hardness problems have been solved, there still must be proper training of dishmachine operators in how  
much detergent is to be used per cycle. Talk with your water treatment specialist and detergent vendor and come up with a  
complete training program for operators. Using too much detergent has as detrimental effects as using too little. The proper  
amount of detergent must be used for job. It is important to remember that certain menu items may require extra detergent by  
their nature and personnel need to be made aware of this. Experience in using the dishmachine under a variety of conditions,  
along with good training in the operation of the machine, can go a long way in ensuring your dishmachine operates as effi-  
ciently as possible.  
Certain dishmachine models require that chemicals be provided for proper operation and sanitization. Some models even  
require the installation of third-party chemical feeders to introduce those chemicals to the machine. Jackson does not recom-  
mend or endorse any brand name of chemicals or chemical dispensing equipment. Contact your local chemical distributor for  
questions concerning these subjects.  
Some dishmachines come equipped with integral solid detergent dispensers. These dispensers are designed to accommodate  
detergents in a certain sized container. If you have such a unit, remember to explain this to your chemical distributor upon first  
contacting them.  
As explained before, water temperature is an important factor in ensuring that your dishmachine functions properly. The data  
plate located on each unit details what the minimum temperatures must be for either the incoming water supply, the wash tank  
and the rinse tank, depending on what model of dishmachine you have installed. These temperatures may also be followed by  
temperatures that Jackson recommends to ensure the highest performance from you dishmachine. However, if the minimum  
requirements are not met, the chances are your dishes will not be clean or sanitized. Remember, a dish can look clean, but it  
may not be sanitized. Instruct your dishmachine operators to observe the required temperatures and to report when they fall  
below the minimum allowed. A loss of temperature can indicate a much larger problem such as a failed heater or it could also  
indicate that the hot water heater for your operation is not up to capacity and a larger one may need to be installed.  
There are several factors to consider when installing your dishmachine to ensure that you get the best possible results from it  
and that it operates at peak efficiency for many years. Discuss your concerns with your local chemical distributor and water  
treatment specialist before there is a problem.  
JP-24 Technical Manual 7610-002-49-79 Rev. D  
Issued: 03-06-2006 Revised: N/A  
9
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SECTION 2: INSTALLATION/OPERATION INSTRUCTIONS  
CYCLE COUNTER RETROFIT KIT INSTRUCTIONS  
1. Locate the template on the front of the plastic control panel in the approximate location as shown in the diagram below.  
2. Use a 3/32" diameter drill bit to drill the four mounting holes through the plastic control panel.  
3. Mount the template to the front of the control panel using the screws and locknuts provided.  
4. Using the template as a guide, cut the 1-3/8" x 1-1/8" cutout (the inside of the template) from the plastic control panel. Use  
a Dremel tool (or similar) or drill multiple holes along the edge of the template in order to cut away the cutout.  
5. Remove the template from the control panel.  
6. Assemble the counter (with mounting plate) to the control panel using the four screws and locknuts provided.  
7. One lead wire from the counter is connected together with the blue wires from the fill solenoid valve and the rinse/fill light  
(using the existing wire nut that connects these two wires together).  
8. The other lead wire from the counter is connected together with the red wires from the fill solenoid valve and the rinse/fill  
light (using the existing wire nut that connects these two wires together).  
9. The counter should increment each time the fill solenoid valve is turned on.  
Template, Cycle Counter Mount  
Cycle Counter Mount  
JP-24 Technical Manual 7610-002-49-79 Rev. D  
Issued: 03-06-2006 Revised: N/A  
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SECTION 3:  
PREVENTATIVE MAINTENANCE  
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SECTION 3: PREVENTATIVE MAINTENANCE  
PREVENTATIVE MAINTENANCE  
The dishmachines covered in this manual are designed to operate with a minimum of interaction with the operator. However,  
this does not mean that some items will not wear out in time. Jackson highly recommends that any maintenance and repairs  
not specifically discussed in this manual should be performed by QUALIFIED SERVICE PERSONNEL ONLY. Performing main-  
tenance on your dishmachine may void your warranty if it is still in effect.  
There are many things that operators can do to prevent catastrophic damage to the dishmachine. One of the major causes of  
component failure has to do with prescrapping procedures. A dishmachine is not a garbage disposal; any large pieces of mate-  
rial that are put into the machine shall remain in the machine until they are either broken up (after spreading out on your ware!)  
or physically removed. Strainers are installed to help catch debris, but they do no good if they are clogged. Have operators reg-  
ularly inspect the pan strainers to ensure (1) that they are free of soil and debris and (2) they are laying flat in the tub.  
When cleaning out strainers, do NOT beat them on waste cans. The strainers are made of metal and can be forgiving; but once  
severe damage is done, it is next to impossible for the strainer to work in the way it was designed to. Wipe out strainers with  
a rag and rinse under a faucet if necessary. For stubborn debris, a toothpick should be able to dislodge any obstructions from  
the perforations. Always ensure that strainers are placed back in the machine before operation and that they lay flat in the tub.  
You may wish to also refer to the page entitled “Detergent Control” in order to learn more about how your water hardness will  
effect the performance of your machine. Hard water makes dishmachines work harder and decreases efficiency.  
Again, it is important to remind operators that trying to perform corrective maintenance on the dishmachine could lead to larg-  
er problems or even cause harm to the operator. If a problem is discovered; secure the dishmachine using proper shut down  
procedures as listed in this manual and contact a QUALIFIED SERVICE AGENCY.  
Some problems, however, may having nothing to do with the machine itself and no amount of preventative maintanence is  
going to help. A common problem has to do with temperatures being too low. Verify that the water temperatures coming to your  
dishmachine match the requirements listed on the machine data plate. There can be a variety of reasons why your water tem-  
perature could be too low and you should discuss it with a QUALIFIED SERVICE AGENCY to determine what can be done.  
By following the operating and cleaning instructions in this manual, you should get the most efficient results from your machine.  
As a reminder, here are some steps to take to ensure that you are using the dishmachine the way it was designed to work:  
1. Ensure that the water temperatures match those listed on the machine data plate.  
2. Ensure that all strainers are in place before operating the machine.  
3. Ensure that all wash and/or rinse arms are secure in the machine before operating.  
4. Ensure that drains are closed/sealed before operating.  
5. Remove as much soil from dishes by hand as possible before loading into racks.  
6. Do not overfill racks.  
7. Ensure that glasses are placed upside down in the rack.  
8. Ensure that all chemicals being injected to machine have been verified as being at the correct concentrations.  
9. Clean out the machine at the end of every workday as per the instructions in the manual.  
10. Always contact a QUALIFIED SERVICE AGENCY whenever a serious problem arises.  
11. Follow all safety procedures, whether listed in this manual or put forth by local, state or national codes/regulations.  
JP-24 Technical Manual 7610-002-49-79 Rev. D  
Issued: 03-06-2006 Revised: N/A  
12  
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SECTION 4:  
TROUBLESHOOTING  
13  
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SECTION 4: TROUBLESHOOTING SECTION  
COMMON PROBLEMS  
WARNING: Inspection, testing and repair of electrical equipment should be performed only by qualified service personnel.  
Certain procedures in this section require electrical tests or measurements while power is applied to the machine. Exercise  
extreme caution at all times. If test points are not easily accessible, disconnect power, attach test equipment and reapply  
power to test. When replacing electrical parts, disconnect power at source circuit breaker.  
Problem: Water overflow from bottom of door.  
1. Clogged drain. Remove obstruction.  
2. Machine not level. Level machine, or increase height to the front.  
3. Excessive inlet pressure. Install pressure reducing valve, or adjust if one is present. Ensure flow is 20±5 PSI.  
4. Detergent foaming. Reduce detergent quantity.  
Problem: Wash motor doesn’t operate on manual wash.  
1. Loose or broken wires. Reconnect or replace wires in motor.  
2. Defective manual wash switch. Replace.  
3. Defective motor starting relay. Replace.  
Problem: Motor operates on manual wash but not on automatic.  
1. Defective timer. Replace timer.  
2. Defective circuit in manual wash switch. Replace switch.  
Problem: No water comes through the rinse arms when the “ON/FILL” switch is depressed.  
1. Water not turned on. Turn water on.  
2. Defective solenoid valve. Replace solenoid valve.  
3. Probes are dirty or coated. Clean probes.  
4. Defective water level control. Replace.  
Problem: Little or no water coming through the rinse assemblies.  
1. Limed up rinse heads or piping. Delime rinse heads.  
2. Low water pressure. Increase pipe size to machine. Adjust pressure regulator.  
Problem: Rinse water runs continuously with breaker turned off.  
1. Defective plunger in solenoid valve. Replace.  
2. Defective diaphragm in solenoid valve. Replace diaphragm.  
Problem: Rinse doesn’t operate on automatic during timed cycle (but does operate in auto/fill operation).  
1. Timer defective. Replace timer.  
Problem: Rinse water runs continuously with power applied to machine, but when circuit breaker to machine is turned  
off, water stops.  
1. Defective water level control. Replace.  
2. Probes are dirty or coated. Clean probes.  
Problem: Wash temperature not at required reading on thermometer.  
1. Defective thermometer. Replace.  
2. Defective thermostat. Adjust thermostat. Replace thermostat.  
3. Rinse heater defective. Replace heater element.  
4. Water level protection control device. Replace.  
JP-24 Technical Manual 7610-002-49-79 Rev. D  
Issued: 03-06-2006 Revised: N/A  
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SECTION 4: TROUBLESHOOTING SECTION  
COMMON PROBLEMS  
WARNING: Inspection, testing and repair of electrical equipment should be performed only by qualified service personnel.  
Certain procedures in this section require electrical tests or measurements while power is applied to the machine. Exercise  
extreme caution at all times. If test points are not easily accessible, disconnect power, attach test equipment and reapply  
power to test. When replacing electrical parts, disconnect power at source circuit breaker.  
Problem: Rinse water not at required temperature range.  
1. Thermometer is defective. Replace.  
2. Thermostat is defective. Adjust the thermostat. Replace if necessary.  
Problem: Machine doesn’t drain when “OFF/DRAIN” switch is pressed.  
1. Drain solenoid clogged. Remove obstruction.  
2. Defective “OFF/DRAIN” switch. Replace.  
3. Defective motor or motor start relay. Replace.  
4. Defective drain solenoid. Replace.  
5. Defective timer. Replace.  
Problem: No indication of pressure.  
1. Water turned off. Turn water on.  
2. 1/4” test cock ball valve is closed. Open the ball valve.  
JP-24 Technical Manual 7610-002-49-79 Rev. D  
Issued: 03-06-2006 Revised: N/A  
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SECTION 5:  
SERVICE PROCEDURES  
16  
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SECTION 5: SERVICE PROCEDURES  
RINSE SOLENOID VALVE REPAIR PARTS KIT  
These dishmachines are equipped with electrical  
STEPS  
solenoid valves to allow for automatic fill and rinse. These  
valves are designed to specific tolerances and design aspects  
that must be met in order to function properly.  
Jackson offers repair kits for replacing some of the  
wear items associated with solenoid valves which will allow  
you to save money in that replacement of these parts can take  
place without removing the solenoid valve from the plumbing  
assembly.  
1. Remove the top screw with the 5/16” nutdriver. Remove the  
screw and the data plate and set to the side.  
The instructions provided here are for maintenance  
personnel only. Unauthorized persons should not attempt any  
of the steps contained in these instructions.  
Warning: many of the instructions and steps  
within this document require the use of tools. Only autho-  
rized personnel should ever perform any maintenance  
procedure on the dishmachine!  
PREPARATION  
1. Power must be secured to the unit at the service  
breaker. Tag or lock out the service breaker to prevent acci-  
dental or unauthorized energizing of the machine.  
Removing the top screw  
2. Ensure that incoming water to the machine is 2. With the top screw and data plate removed, grasp the sole-  
secured either by use of a shut-off valve or disconnecting the noid coil and gently pull up. The coil should slide up, allowing  
incoming water line.  
you to remove it from the valve bonnet. If you are wanting to  
replace the coil, continue on with Step 3. If you are wanting to  
replace some of the internal components of the valve, proceed  
to step 12.  
TOOLS REQUIRED  
The following tools will be needed to perform this  
maintenance evolution:  
1. Small flathead screwdriver  
2. Medium flathead screwdriver  
2. Needle nose pliers  
3. 5/16” nutdriver  
4. Channel locks  
5. 12” pipe wrench  
TIME REQUIRED  
It is estimated that it will take (1) person twenty min-  
utes to perform this task, not including all of the items indicat-  
ed in the section entitled “PREPARATION”.  
Removing the coil  
IMPORTANT NOTES  
3. NOTE: Replacing the solenoid coil requires working with  
1. Read these instructions thoroughly before attempt- the wiring of your machine. It is important that all wiring main-  
ing this maintenance evolution. Become familiar with the parts tenance be performed by qualified personnel. Always verify  
and what actions need to be taken. This will save time in the the wiring steps presented in this instruction with the schemat-  
long run!  
ic that shipped with the unit. A current schematic can also be  
2. The procedures demonstrated in this manual are found in the unit’s installation manual. Before beginning any  
shown being performed on an AJ-44C rack conveyor dishma- step that involves working with wiring, ensure that the steps  
chine. The actual maintenance steps, however, apply to any located in the section entitled “Preparation” have been per-  
Parker style solenoid valve found on a Jackson dishmachine. formed. Power must be secured to the machine at the service  
breaker. Failure to do so could result in severe injury to main-  
tenance personnel.  
JP-24 Technical Manual 7610-002-49-79 Rev. D  
Issued: 03-06-2006 Revised: N/A  
17  
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SECTION 5: SERVICE PROCEDURES  
RINSE SOLENOID VALVE REPAIR PARTS KIT (CONTINUED)  
Loosening the conduit nut  
Prying open the coil wire cover  
7. Using a pair of channel locks, gently loosen the conduit  
retaining ring for the conduit nut. Once it is loosened, use your  
fingers to unscrew and remove it.  
4. When replacing the coil, ensure that when removing the coil  
wire cover that care is taken not to damage the wires inside.  
Using the medium flathead screwdriver, gently use it to open  
the cover enough to where it could be pulled off.  
8. Pull the conduit away and discard the bad coil. Take the  
new coil and attach the conduit, reinstall & tighten the conduit  
nut, and pull the wires through so that you will be able to wire  
the valve back up.  
9. Reconnect the wires from the conduit to the wires from the  
solenoid as they had been connected previously. Ensure that  
the wire nuts are on tight.  
10. Slide the coil wire cover back on, taking care not to dam-  
age the wires.  
11. If you are done performing maintenance on the valve, con-  
tinue on to step 22. Otherwise, please go on to step 12.  
Straightening the wires  
5. Once the coil wire cover has been removed and set to the  
side, take the internal wires and pull them out straight.  
Loosening the valve bonnet  
12. To remove the valve bonnet, grasp it with the jaws of the  
pipe wrench and turn to the left. Note: on some models you  
may have to remove the valve in order to perform this and any  
further steps. Be careful not to damage the plumbing assem-  
bly. Only use the pipe wrench enough to where you can spin  
the valve bonnet off with your hand.  
Removing the wire nuts  
6. Remove the wire nuts from the wires and separate them.  
JP-24 Technical Manual 7610-002-49-79 Rev. D  
Issued: 03-06-2006 Revised: N/A  
18  
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SECTION 5: SERVICE PROCEDURES  
RINSE SOLENOID VALVE REPAIR PARTS KIT (CONTINUED)  
Removing the valve bonnet  
13. Slowly remove the valve bonnet. Note: The spring for the  
plunger is located directly under the bonnet and may come  
free if you are not careful. Remove the plunger, spring and  
valve bonnet and place to the side.  
Removing the diaphragm  
17. Remove the diaphragm retainer and then the diaphragm  
itself. Many problems associated with a solenoid valve can be  
traced to a clogged pilot port in the diaphragm.  
Removing the O-ring  
14. Remove the O-ring and inspect it. If it has any tears or cuts  
or excessive flat spaces, it should be replaced.  
Pointing out the extension hole  
15. Examine the threads for the valve bonnet. Check them for  
scoring or signs of damage. Take a cloth and clean them out  
to remove any foreign particles that might get lodged in the  
threads and cause a leak. Severely damage threads should  
not be repaired; instead it is recommended that the entire  
valve should be replaced. These instructions do not provide  
information on replacing the solenoid valve.  
18. As indicated in the photo above, the extension hole can  
become clogged. If it is difficult to clean out, you can use a  
heated straight pin to push through the hole. The center hole,  
the pilot port, must also be clear. If the diaphragm is torn or  
bent in any way, it must be replaced.  
16. Note: Even though an O-ring may not appear damaged, it  
is a good idea to go ahead and replace it if you have a new  
one. This will help ensure that your valve remains leak-free in  
the future!  
1
2
Diaphragm showing (1) pilot port and (2) extension hole  
JP-24 Technical Manual 7610-002-49-79 Rev. D  
Issued: 03-06-2006 Revised: N/A  
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SECTION 5: SERVICE PROCEDURES  
RINSE SOLENOID VALVE REPAIR PARTS KIT (CONTINUED)  
21. With the mesh screen removed, look down into the valve  
and verify it is not clogged. Remove any foreign objects from  
the valve body that would obstruct flow.  
22. Reassemble the valve, reversing the steps needed to take  
it apart. Replace defective replacement parts with new parts  
from ordered kits. Ensure that components are sufficiently  
tightened to prevent leakage.  
AFTER MAINTENANCE ACTIONS  
Reconnect the incoming water (if disconnected) and  
turn on. Then restore power to the unit. Run the unit for at  
least 10 minutes to ensure there are no leaks. If any problems  
arise please contact Jackson.  
Removing the screen retainer  
19. Using the small flathead screwdriver, lift out the screen  
retainer. Verify that the holes in it are free of clogs and debris.  
SPECIAL PARTS  
Solenoid Valve Plunger Kit  
Includes plunger and spring  
Part number 06401-003-07-40  
Solenoid Valve Diaphragm Kit  
Includes diaphragm and o-ring  
Part number 06401-003-07-41 (1/2” NPT)  
Solenoid Valve 110 Volt Coil and Housing Kit  
Part number 06401-003-07-43  
Solenoid Valve 220 Volt Coil and Housing Kit  
Part number 06401-003-07-44  
Removing the mesh strainer screen  
Complete Solenoid Valve  
20. Again using the small flathead screwdriver, carefully  
remove the mesh screen from inside the valve body. The  
screen should be taken and rinsed out to remove any debris  
fouling it.  
Part number 04810-100-12-18 (1/2”, 110 Volt)  
Part number 04810-100-09-18 (1/2”, 220 Volt)  
View inside the solenoid valve body  
JP-24 Technical Manual 7610-002-49-79 Rev. D  
Issued: 03-06-2006 Revised: N/A  
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SECTION 5: SERVICE PROCEDURES  
VACUUM BREAKER REPAIR PARTS KIT  
These dishmachines are equipped with vacuum  
STEPS  
breakers to serve as back-flow prevention devices. ASSE  
requirements specify what type of back-flow prevention is nec-  
essary on dishmachines. Vacuum breakers, unlike air gaps,  
have certain parts that have specific tolerances and design  
aspects that must be met in order to function properly.  
Jackson offers repair kits for replacing some of the  
wear items associated with vacuum breakers which will allow  
you to save money in that replacement of these parts can take  
place without removing the vacuum breaker from the plumb-  
ing assembly.  
1. Note: These instructions only apply to vacuum breakers  
(1/2” NPT and 3/4” NPT) as pictured below. The repair kits  
indicated in these instructions will only work on those style of  
back-flow preventers. If you have a machine with a different  
style of vacuum breaker, contact Jackson about replacement  
components.  
The instructions provided here are for maintenance  
personnel only. Unauthorized persons should not attempt any  
of the steps contained in these instructions.  
Warning: many of the instructions and steps  
within this document require the use of tools. Only autho-  
rized personnel should ever perform any maintenance  
procedure on the dishmachine!  
PREPARATION  
Vacuum breaker  
1. Power must be secured to the unit at the service 2. Note: Even though the photos in these instructions show a  
breaker. Tag or lock out the service breaker to prevent acci- vacuum breaker that has been removed from the plumbing  
dental or unauthorized energizing of the machine.  
assembly, these maintenance steps could be performed with it  
2. Ensure that incoming water to the machine is installed so long as the requirements in the section entitled  
secured either by use of a shut-off valve or disconnecting the “PREPARATION” have been met.  
incoming water line.  
3. Remove the top cap by gripping firmly and turning to the  
left. The cap should come off after a few turns.  
TOOLS REQUIRED  
The following tools will be needed to perform this  
maintenance evolution:  
1. Small flathead screwdriver  
2. Needle nose pliers  
TIME REQUIRED  
It is estimated that it will take (1) person twenty min-  
utes to perform this task, not including all of the items indicat-  
ed in the section entitled “PREPARATION”.  
IMPORTANT NOTES  
Removing the cap  
1. Read these instructions thoroughly before attempt-  
ing this maintenance evolution. Become familiar with the parts 4. Set the cap to the side.  
and what actions need to be taken. This will save time in the  
long run!  
5. Using the needle nose pliers, gently lift out the plunger and  
set to the side. Examine the brass seating surface inside the  
vacuum breaker. The plunger is required to sit flat on this sur-  
face so it must be free of defects, imperfections and the like. If  
there is debris, remove it. If it is chipped or cracked then the  
vacuum breaker must be replaced. Failure to do so may result  
in the vacuum breaker not working according to its design and  
could result in damage to the dishmachine.  
JP-24 Technical Manual 7610-002-49-79 Rev. D  
Issued: 03-06-2006 Revised: N/A  
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SECTION 5: SERVICE PROCEDURES  
VACUUM BREAKER REPAIR PARTS KIT (CONTINUED)  
7. If any of these conditions are present, replace the old  
plunger with the new one from your kit. Verify that the new  
plunger is also free from defects. If it is not, contact Jackson  
immediately.  
8. The plunger should drop into the vacuum breaker and seat.  
Ensure it is not flipped upside down (the orange seal ring  
should be up towards the top of the vacuum breaker).  
9. Pick up the cap and examine it. With a soft towel, remove  
any grit, grime or debris that may have gotten caught in the  
threads of both the cap retainer or the vacuum breaker body.  
There is an O-ring that should be present on the cap retainer  
as well. Regardless of the condition of the plunger, this O-ring  
should be replaced once the cap is removed. Using a small  
flathead screwdriver, remove the old O-ring.  
Removing the plunger  
6. Your repair kit comes with a new plunger. Examine the old  
one and ensure that the mating surface is not damaged or cut.  
Also inspect the rubber seal on the top of the plunger to  
ensure it is in good condition and not torn.  
Replacing the O-ring  
10. With the new O-ring in place, screw the cap back on the  
vacuum breaker body. The cap needs to only be hand tight  
(snug).  
Examining the seal ring on the plunger  
AFTER MAINTENANCE ACTIONS  
1. Reconnect the incoming water (if disconnected)  
and turn on. Then restore power to the unit. Run the unit for  
at least 10 minutes to ensure there are no leaks. If any prob-  
lems arise please contact Jackson.  
SPECIAL PARTS  
Vacuum breaker repair kit:  
For 1/2” NPT order 06401-003-06-23  
Complete Vacuum Breaker Assembly  
Part number 04820-003-06-13 (1/2”)  
Examining the plunger seating surface  
JP-24 Technical Manual 7610-002-49-79 Rev. D  
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SECTION 5: SERVICE PROCEDURES  
REPLACING THE PUMP MOTOR/REPLACING THE HEATER  
REPLACING THE PUMP MOTOR  
The following list of tools will be needed to complete this procedure. 5/6” nutdriver, phillips screwdriver, 7/16” socket  
and ratchet, and 7/16” wrench.  
1. Disconnect the electrical power to the dishwasher at the main circuit breaker box when servicing. Place a tag on the cir-  
cuit box indicating the circuit is being repaired.  
2. Disconnect power and conduit from dishmachine terminal block.  
3. Turn off the water supply and disconnect the water supply line.  
4. Disconnect the dishmachine drain hose from the kitchen’s  
drain. Drain the machine of any water at this time.  
5. Move the machine out and lay machine onto its back.  
6. Use a 5/16” nutdriver to loosen the hose clamp and remove  
the pump hose to the drain valve.  
8
7. Use a 5/16” nutdriver to loosen the hose clamp and remove  
the pump hose from the suction casting.  
6
8. Use a 5/16” nutdriver to loosen the hose clamp and remove  
the pump hose from the discharge hub casting.  
9. Use a 7/16” socket and ratchet, and a 7/16” wrench to  
remove the drain valve mounting bracket from the motor brack-  
et.  
10. Use a 7/16” socket and ratchet to remove the pump motor  
assembly by loosening the (4) locknuts securing the motor  
mounting bracket. NOTE: The motor mounting bracket is slot-  
ted to allow for easy removal and installation. Remove (2) of the  
locknuts on one side and slide the assembly toward that side  
and remove. Once the assembly is removed, disconnect the  
wire leads from the motor wiring box.  
10  
9
7
11. Install replacement motor in reverse order of above.  
Replacing the Pump Motor  
REPLACING THE BOOSTER TANK HEATER  
The following list of tools will be needed to complete this procedure: phillips screwdriver and 1/2” socket and ratchet.  
1. Disconnect the electrical power to the dishwasher at the main circuit breaker box when servicing. Place a tag on the cir-  
cuit box indicating the circuit is being repaired.  
2. Use the phillips screwdriver to remove the two screws from the bottom of the kick panel.  
3. Disconnect power and conduit from dishmachine terminal block.  
4. Turn off the water supply to the dishmachine.  
5. VERY IMPORTANT: Disconnect wire lead (orange/white) from heater contactor coil. Note: Wire is tagged in electrical  
panel.  
6. Drain water from booster tank.  
7. Remove the wires from the heater.  
Heater Gasket  
Heater  
8. Use a 1/2” socket and ratchet to remove the (4) 5/16-18 hex  
nuts and lock washers. Remove the heater and heater gasket  
from booster tank.  
8. Install the replacement heater and gasket, the tighten firmly.  
9. Connect wire leads to heater and tighten firmly.  
10. Turn on water supply and power to dishmachine.  
11. Place cycle switch in AUTO position and depress power  
switch to ON/FILL position.  
12. VERY IMPORTANT: Run the dishmachine through several  
complete cycles and check water level in wash sump. If there is  
water in the wash sump, reconnect the wire lead (orange/white)  
previously removed from the heater contactor coil.  
13. Run the dishwasher through several cycles and check to see  
that rinse and wash temperatures are correct.  
Hex Nuts & Washers  
Replacing the Heater  
JP-24 Technical Manual 7610-002-49-79 Rev. D  
Issued: 03-06-2006 Revised: N/A  
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SECTION 5: SERVICE PROCEDURES  
REPLACING THE DRAIN VALVE  
REPLACING THE DRAIN VALVE  
The following list of tools will be needed to complete this procedure. 5/16” nutdriver, flat screwdriver, phillips screwdriver, and  
7/16” socket and ratchet.  
1. Disconnect the electrical power to the dishwasher at the main circuit breaker box when servicing. Place a tag on the cir-  
cuit box indicating the circuit is being repaired.  
2. Disconnect the power and conduit from dishmachine terminal block.  
3. Turn off the water supply to the dishmachine.  
4. Move the dishmachine away from the wall for servicing.  
5. Use a 7/16” socket and ratchet to remove the lower enclosure panel at rear of machine.  
6. Drain the dishmachine. Siphon out the water or remove inlet hose to drain valve and drain into pan. The dishmachine  
may be drained by opening the petcock on the pump housing or by removing the wash thermometer bulb from the lower wash  
tank.  
7. Use a 5/16” nutdriver to loosen the hose clamp and remove the inlet hose to the drain valve from the pump motor.  
8. Use a phillips screwdriver to remove the cover from the valve. Use a flat screwdriver to disconnect the lead wires and  
ground to the drain valve.  
9. Use a 5/16” nutdriver to loosen the hose clamp and remove the discharge hose from the drain valve.  
10. Use a phillips screwdriver to remove the screws attaching the drain valve to the mounting plate.  
11. Reverse the procedures to install the new valve. INSURE GROUND WIRE LEAD IS CONNECTED PROPERLY TO TER-  
MINAL ON THE MOTOR.  
7
8
10  
9
Replacing the Drain Valve  
JP-24 Technical Manual 7610-002-49-79 Rev. D  
Issued: 03-06-2006 Revised: N/A  
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SECTION 5: SERVICE PROCEDURES  
RINSE REGULATING THERMOSTAT REPLACEMENT  
Many dishmachines comes with integral booster  
STEPS  
tanks to ensure proper temperature of the final rinse. Jackson  
has predominantly used two manufacturers of thermostats,  
EGO and Stemco. These instructions are for use with kit  
06401-003-13-94, which is to replace an EGO rinse regulating  
thermostat with a Stemco brand.  
1. Some models, such as the Tempstar pictured below, will  
require that the thermostat bracket removed from the heater.  
Using a ratchet, extension and 1/2” socket, remove the nuts  
and lock washer holding the bracket on.  
Jackson offers all of the repair parts necessary for  
performing this task.  
The instructions provided here are for maintenance  
personnel only. Unauthorized persons should not attempt any  
of the steps contained in these instructions.  
Warning: many of the instructions and steps  
within this document require the use of tools. Only autho-  
rized personnel should ever perform any maintenance  
procedure on the dishmachine!  
PREPARATION  
1. Power must be secured to the unit at the service  
breaker. Tag or lock out the service breaker to prevent acci-  
dental or unauthorized energizing of the machine.  
2. Ensure that incoming water to the machine is  
secured either by use of a shut-off valve or disconnecting the  
incoming water line.  
Removing the thermostat bracket/heater nuts.  
3. The unit must be drained completely with the drain  
stopper removed (if applicable).  
4. Remove any and all access covers.  
TOOLS REQUIRED  
The following tools may be needed to perform this  
maintenance evolution:  
1. 3/8” Nutdriver  
2. 7/16” Combination Wrench  
3. Needlenose Pliers  
4. Phillipshead Screwdriver  
5. Flathead Screwdriver  
6. Ratchet with 1/2” Socket  
Removing the thermostat bracket.  
TIME REQUIRED  
2. With the thermostat and thermostat bracket safely out of the  
way, use a 7/16” combination wrench to loosen and then  
remove the imperial brass fitting holding the probe in.  
It is estimated that it will take (1) person sixty minutes  
to perform this task, not including all of the items indicated in  
the section entitled “PREPARATION”.  
3. Remove the wires from the old thermostat. It may be nec-  
essary to use the needlenose pliers to accomplish this.  
IMPORTANT NOTES  
4. Remove the thermostat bracket mounting nuts with the  
1. Read these instructions thoroughly before 7/16” nutdriver.  
attempting this maintenance task. Become familiar with the  
parts and what actions need to be taken. This will save time in  
the long run!  
2. These instructions are shown using a Tempstar  
model dishmachine. However the steps provided should work  
for models such as the JP-24 as well.  
JP-24 Technical Manual 7610-002-49-79 Rev. D  
Issued: 03-06-2006 Revised: N/A  
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SECTION 5: SERVICE PROCEDURES  
RINSE REGULATING THERMOSTAT REPLACEMENT  
Location of the thermostat bracket (JP-24).  
Pulling the thermostat probe and fitting from the well (Tempstar).  
Remove the thermostat bracket mounting nuts with the 3/8”  
nutdriver.  
Removing the wires from the thermostat.  
5. Attach the jumper wires to the wires that you removed from  
the old thermostat.  
Location of the imperial brass fitting (JP-24).  
Attaching the jumper wires.  
Removing the imperial brass fitting (Tempstar).  
JP-24 Technical Manual 7610-002-49-79 Rev. D  
Issued: 03-06-2006 Revised: N/A  
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SECTION 5: SERVICE PROCEDURES  
RINSE REGULATING THERMOSTAT REPLACEMENT  
9. Note: regardless of the unit this is being done to, the con-  
cept is to ensure that the thermostat cannot come into contact  
with the heater leads or interfere with the placement of any  
covers.  
Sliding imperial fitting onto new thermostat.  
6. Slide the new imperial brass fitting from your kit onto the  
new thermostat.  
What the installed thermostat should look like (Tempstar).  
Putting the new thermostat in the well (Tempstar).  
7. Insert the new thermostat/brass fitting combination into the  
well and tighten down the brass fitting by hand.  
What the installed thermostat should look like (JP-24B).  
Removing the thermostat screws.  
Tightening the brass fitting (Tempstar).  
10. Use the phillipshead screwdriver to remove the attach-  
ment screws on the thermostat for the NORMALLY CLOSED  
and COMMON points.  
8. Use the 7/16” combination wrench to tighten down the  
brass fitting, while also positioning the new thermostat so that  
it does not hang over the heater.  
JP-24 Technical Manual 7610-002-49-79 Rev. D  
Issued: 03-06-2006 Revised: N/A  
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SECTION 5: SERVICE PROCEDURES  
RINSE REGULATING THERMOSTAT REPLACEMENT  
need to be run on the unit while observing the final rinse tem-  
perature. The thermostat needs to cycle so that the final rinse  
water meets the indicated minimums on the machine data  
plate for every cycle.  
Fitting the jumper into the mounting cup.  
11. Attach the ring ends of the jumpers to the cups/screws  
removed from the thermostat and attach them. The white  
jumper is to be connected to COMMON. The orange and  
white jumper is to be connected to NORMALLY CLOSED.  
Refer to your machine schematic if you have any questions  
regarding this.  
Calibrating the new thermostat.  
SPECIAL NOTES  
Work performed on Jackson dishmachines by unau-  
thorized or unqualified personnel may void the warranty.  
Before beginning this or any other maintenance evolution on  
a unit under warranty, you should contact a certified Jackson  
technician or Jackson Technical Service. You can find a list of  
qualified service agencies in the back of you unit’s installation  
manual.  
SPECIAL PARTS  
Thermostat Replacement Kit: 06401-003-13-94*  
Securing jumpers to the thermostat.  
*The kit contains a thermostat, imperial brass fitting,  
jumper wires and instructions.  
12. Once both wires are attached, ensure that there is no  
excess hanging out where it could become pinched by any  
cover or such.  
13. Replace the heater nuts (if removed) and torque down as  
required per the technical manual. Different models may have  
different torque specifications. Contact Jackson Technical  
Service if there are any questions regarding this.  
AFTER MAINTENANCE ACTIONS  
Once the new thermostat is installed, it will be nece-  
sary to ensure that it operates at the required and appropriate  
ranges. The new thermostat has an adjustment that can be  
turned using a small flathead screwdriver. Several cycles will  
JP-24 Technical Manual 7610-002-49-79 Rev. D  
Issued: 03-06-2006 Revised: N/A  
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SECTION 6:  
PARTS SECTION  
29  
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SECTION 6: PARTS SECTION  
GAUGE PANEL ASSEMBLY  
1
2
3
4
5
6
Dielectric Cover, Electrical Panel  
05700-011-40-48  
7
15  
8
9
10  
11  
12  
13  
14  
ITEM QTY  
DESCRIPTION  
Mfg. No.  
1
2
3
4
5
5
6
7
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
Gauge, 0-100 PSI w/Green Zone  
Fitting, 1/4” BARB x 1/4” FNPT Swivel  
Hose, 5/16” x 12"  
Fitting, 1/4” BARB x 1/4” MNPT Swivel  
Control Panel (208-240 Volt)  
Control Panel (460 Volt)  
Decal, Control Panel  
Thermometer, 96” Wash  
Thermometer, 48” Rinse  
Switch, ON/FILL & OFF/DRAIN  
Light, Red  
Switch, Delime  
Light, Amber  
Light, Green  
Breaker, 2A Circuit (460 Volt unit only)  
Light, Red (460 Volt unit only)  
06680-011-86-42  
04730-011-95-42  
05700-011-86-45  
04730-011-95-41  
09330-041-41-94  
09330-041-85-00  
09905-031-40-55  
06685-111-68-49  
06685-111-68-48  
05930-301-49-55  
05945-111-44-45  
05930-011-49-00  
05945-111-44-44  
05945-111-44-43  
05925-111-64-18  
05945-111-44-45  
8
9
10  
11  
12  
13  
14  
15  
JP-24 Technical Manual 7610-002-49-79 Rev. D  
Issued: 03-06-2006 Revised: N/A  
30  
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SECTION 6: PARTS SECTION  
ELECTRICAL PANEL ASSEMBLY (JP-24/F 208-240 VOLT)  
6
4
2
3
4
5
7
1
8
9
10  
11  
12  
13, 14, 12  
4
15  
16  
ITEM QTY  
DESCRIPTION  
Mfg. No.  
1
2
3
4
5
6
7
8
1
1
1
8
1
1
1
1
1
1
1
4
1
1
1
1
1
2
4
Electrical Control Panel Weldment  
Bushing, Snap  
Contactor, Motor  
Screw, 10-32 x 3/8” Phillips Truss Round Head  
Locknut, 10-24 S/S Hex with Nylon Insert  
Wire Lug  
Grommet, 1 1/8" Heyco  
Decal, Copper Conductors  
Decal, Ground, L1, L2  
Bracket, Relay Mounting  
Relay, 220-240 Volt  
Screw, 6-32 x 3/8” Sems with External Tooth Lockwasher  
Decal, Timer  
Timer, 60 HZ  
Timer, 50 HZ  
Timer, 5 Minute  
Track, Terminal 3 5/16"  
Block, Snap-in Terminal  
Locknut, 1/4”-20 S/S Hex with Nylon Insert (not shown)  
05700-011-41-79  
05975-210-03-00  
05945-002-74-20  
05305-173-12-00  
05310-373-01-00  
05940-200-76-00  
05975-210-08-00  
09905-011-47-35  
09905-101-40-82  
05700-002-37-85  
05945-111-89-75  
05305-002-25-91  
09905-011-40-70  
05945-121-41-60  
05945-002-13-34  
05945-121-44-89  
05700-000-43-60  
05940-500-02-19  
05310-374-01-00  
9
10  
11  
12  
13  
14  
14  
14  
15  
16  
17  
JP-24 Technical Manual 7610-002-49-79 Rev. D  
Issued: 03-06-2006 Revised: N/A  
31  
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SECTION 6: PARTS SECTION  
ELECTRICAL PANEL ASSEMBLY (JP-24B/BF 208-240 VOLT)  
6
2
3
4
4
7
1
5
8
9
10  
4
15  
11 12, 13  
4
14  
ITEM QTY  
DESCRIPTION  
Mfg. No.  
1
2
3
4
5
6
7
8
1
1
1
9
1
1
1
1
1
1
1
1
1
1
2
1
2
4
Electrical Control Panel Weldment  
Bushing, Snap  
Contactor, Motor  
Screw, 10-32 x 3/8” Phillips Truss Round Head  
Locknut, 10-24 S/S Hex with Nylon Insert  
Wire Lug  
Grommet, 1 1/8" Heyco  
Decal, Copper Conductors  
Decal, Ground, L1, L2  
Contactor, Heater  
Decal, Timer  
Timer, 60 HZ  
Timer, 50 HZ  
Timer, 5 Minute  
Screw, 6-32 x 3/8” Sems with External Tooth Lockwasher  
Track, Terminal 3 5/16"  
Block, Snap-in Terminal  
05700-011-41-79  
05975-210-03-00  
05945-002-74-20  
05305-173-12-00  
05310-373-01-00  
05940-200-76-00  
05975-210-08-00  
09905-011-47-35  
09905-101-40-82  
05945-002-74-20  
09905-011-40-70  
05945-121-41-60  
05945-002-13-34  
05945-121-44-89  
05305-002-25-91  
05700-000-43-60  
05940-500-02-19  
05310-374-01-00  
9
10  
11  
12  
12  
12  
13  
14  
15  
16  
Locknut, 1/4”-20 S/S Hex with Nylon Insert (not shown)  
JP-24 Technical Manual 7610-002-49-79 Rev. D  
Issued: 03-06-2006 Revised: N/A  
32  
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SECTION 6: PARTS SECTION  
ELECTRICAL PANEL ASSEMBLY (JP-24B/BF 460 VOLT)  
1
2
3
4
3
5
6
7, 8  
9
10  
13  
11, 12,  
5
14, 5  
15, 16  
17  
18, 19, 16  
ITEM QTY  
DESCRIPTION  
Bushing, Snap  
Track, Terminal 6 7/8"  
End Clamp  
Contactor, Mini  
Screw, 10-32 x 3/8” Phillips Truss Round Head  
Track, Terminal 3 3/4"  
Mfg. No.  
1
1
1
2
2
9
1
1
3
1
1
1
1
1
1
1
2
1
1
1
4
05975-210-03-00  
05700-021-62-91  
05940-111-60-30  
05945-111-60-07  
05305-173-12-00  
05700-011-62-89  
09905-101-12-66  
05940-500-02-19  
05700-031-62-94  
05975-210-08-00  
05940-200-76-00  
09905-011-41-82  
05945-111-60-08  
05950-011-50-70  
05940-021-94-85  
05305-002-25-91  
05310-373-01-00  
05945-121-44-69  
09905-011-40-70  
05310-374-01-00  
2
3
4
5
6
7
8
9
Decal, L1, L2, L3  
Block, Snap-in Terminal  
Electrical Control Panel Weldment  
Grommet, 1 1/8" Heyco  
Wire Lug  
Ground Decal  
Overload, Contactor  
ACME Transformer, 480 to 120 Volt  
Terminal Board, 1/4 QC  
Screw, 6-32 x 3/8” Sems with External Tooth Lockwasher  
Locknut, 10-24 S/S Hex with Nylon Insert  
Timer, 6 Cam  
10  
11  
12  
13  
14  
15  
16  
17  
18  
19  
20  
Decal, Timer  
Locknut, 1/4”-20 S/S Hex with Nylon Insert (not shown)  
JP-24 Technical Manual 7610-002-49-79 Rev. D  
Issued: 03-06-2006 Revised: N/A  
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SECTION 6: PARTS SECTION  
GAUGE PANEL ASSEMBLY  
This panel is used with the following:  
External Control Box Option  
AMTRAK External Control Box Option  
1
2
3
4
5
6
7
8
Dielectric Cover, Electrical Panel  
05700-011-40-48  
ITEM  
QTY  
DESCRIPTION  
Mfg. No.  
1
2
3
4
5
6
7
8
1
1
1
1
1
1
1
1
Gauge, 0-100 PSI with Green Zone  
Thermometer, 96” Wash  
Thermometer, 48” Rinse  
Control Panel, Remote JP-24  
Decal, JP-24 External Control Panel  
Fitting, 1/4” BARB x 1/4” FNPT Swivel  
Hose, 5/16” x 12"  
06680-011-86-42  
06685-111-68-49  
06685-111-68-48  
09330-041-73-91  
09905-031-73-94  
04730-011-95-42  
05700-011-86-45  
04730-011-95-41  
Fitting, 1/4” BARB x 1/4” MNPT Swivel  
JP-24 Technical Manual 7610-002-49-79 Rev. D  
Issued: 03-06-2006 Revised: N/A  
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SECTION 6: PARTS SECTION  
ELECTRICAL PANEL ASSEMBLY (EXTERNAL OPTION & AMTRAK OPTION)  
INSIDE VIEW of AMTRAK & EXTERNAL OPTIONS  
9 10 11  
FRONT VIEW EXTERNAL OPTION  
1
2
3
4
6
7
8
7
12, 7  
13  
14  
15  
16  
20  
7
18  
7
19  
7
5
17  
RIGHT SIDE VIEW AMTRAK OPTION  
1
2
3
4
Electrical Component Mounting Bracket  
05700-031-84-85  
14  
15  
16  
Control Box Mounting Panel  
(Amtrack Option Only)  
05700-001-99-38  
JP-24 Technical Manual 7610-002-49-79 Rev. D  
Issued: 03-06-2006 Revised: N/A  
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SECTION 6: PARTS SECTION  
ELECTRICAL PANEL ASSEMBLY (EXTERNAL OPTION & AMTRAK OPTION) (CONTINUED)  
ITEM QTY  
DESCRIPTION  
Mfg. No.  
1
1
2
2
3
4
5
6
1
1
1
1
1
1
1
1
9
1
2
1
1
1
1
1
1
1
1
1
1
1
1
2
Control Box, JP-24 External Machined  
Control Box, Amtrak 24 Remote  
Decal, External Control Box  
Decal, Amtrak Control Box  
Switch, ON/FILL & OFF/DRAIN  
Switch, Delime  
05700-031-73-01  
05700-031-93-17  
09905-031-84-87  
09905-031-84-87  
05930-301-49-55  
05930-011-49-00  
05945-002-74-20  
05700-031-91-51  
05305-173-12-00  
05700-000-43-60  
05940-500-02-19  
09905-101-40-82  
09905-011-86-86  
05940-200-76-00  
09905-011-47-35  
05945-111-44-45  
05945-111-44-44  
05945-111-44-43  
09905-011-40-70  
05945-121-41-60  
05945-002-13-34  
05945-121-44-89  
05945-002-74-20  
05305-171-02-00  
Contactor, Motor  
Panel, Inner Control Box  
Screw, 10-32 x 3/8” Phillips Truss Round Head  
Track, Terminal 3 5/16"  
Block, Snap-in Terminal  
Decal, Ground, L1, L2  
Decal, Ground  
Wire Lug  
Decal, Copper Conductors  
Light, Red  
Light, Amber  
Light, Green  
Decal, Timer  
Timer, 60 HZ  
Timer, 50 HZ  
Timer, 5 Minute  
Contactor, Heater  
Screw, 6-32 x 3/8” Phillips Round Head  
7
8
9
10  
11  
12  
13  
14  
15  
16  
17  
18  
19  
20  
JP-24 Technical Manual 7610-002-49-79 Rev. D  
Issued: 03-06-2006 Revised: N/A  
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SECTION 6: PARTS SECTION  
KICK PLATE ASSEMBLY  
Dielectric Cover, Kickplate Panel  
05700-011-40-49  
Decal, Power Disconnect Warning  
09905-021-47-07  
Nut, Nylon Wing, 1/4”-20  
05310-994-01-00  
Kickplate Weldment  
05700-041-86-40  
Control Panel Assembly  
05700-011-40-93  
Control Panel Only  
09330-041-41-94  
460 Control Panel Assembly  
05700-002-18-38  
460 Control Panel Only  
09330-041-85-00  
JP-24 Technical Manual 7610-002-49-79 Rev. D  
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SECTION 6: PARTS SECTION  
INCOMING PLUMBING ASSEMBLY (JP-24/JP-24F)  
Vacuum Breaker Assembly  
Plug, 1/4” Brass  
3 per machine  
4730-209-01-00  
Vacuum Breaker  
04820-003-06-13  
12  
Injector Weldment  
05700-031-41-83  
Connects to  
Rinse Injector  
Clamp, Hose  
04730-719-06-09  
Connects to  
Rinse Stiffener  
5
6
8
Hose, 3/4” x 8 1/2”  
05700-011-38-83  
11  
4
8
8
9
10  
1
2
3
2
2
7
ITEM QTY  
DESCRIPTION  
Mfg. No.  
1
2
3
4
5
6
7
8
1
3
1
1
1
1
1
3
1
1
1
1
Y-Strainer, 1/2"  
Adapter, 1/2" Ftg. x Male  
Tee, 1/2” C x 1/2” C x 1/4” Female  
Ball Valve, Test Cock 1/4"  
Valve, Solenoid 1/2", 115 volt  
Union, 1/2" C to C  
Copper Tube, 1/2" x 2"  
Elbow, 1/2", 90° C to C  
Copper Tube, 1/2" x 19 1/2"  
Copper Tube, 1/2" x 4 1/2"  
Copper Tube, 1/2" x 25 1/2"  
Adapter, 1/2" Ftg. x Male  
04730-217-01-10  
04730-011-59-53  
04730-411-25-01  
04810-011-72-67  
04810-100-12-18  
04730-412-05-01  
05700-001-04-66  
04730-406-01-01  
05700-011-59-84  
05700-011-59-83  
05700-011-59-85  
04730-401-03-01  
9
10  
11  
12  
JP-24 Technical Manual 7610-002-49-79 Rev. D  
Issued: 03-06-2006 Revised: N/A  
38  
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SECTION 6: PARTS SECTION  
INCOMING PLUMBING ASSEMBLIES (JP-24B/JP-24BF)  
Plug, 1/4” Brass  
3 per machine  
04730-209-01-00  
Vacuum Breaker  
04820-003-06-13  
Injector Weldment  
05700-031-41-83  
Pipe Clamp  
05700-011-38-62  
Secured with:  
Locknut, 1/4”-20 S/S  
Hex with Nylon Insert  
05310-374-01-00  
Pipe, Assembly  
1/2” NPT x 23 1/2”  
05700-031-41-83  
6
7
Elbow, 1/2” NPT 90° Brass  
04730-011-42-96  
Nipple, 1/2” Close Brass  
04730-207-15-00  
4
2
5
2
3
2
8
7
1
9
ITEM QTY  
DESCRIPTION  
Mfg. No.  
1
2
3
4
5
6
7
8
9
1
3
1
1
1
1
2
1
1
Y-Strainer, 1/2"  
Adapter, 1/2" Ftg. x Male  
Tee, 1/2 x 1/2 x 1/4  
Ball Valve, Test Cock 1/4"  
Valve, Solenoid 1/2" 220 volt  
Union, 1/2" C to C  
Elbow, 1/2" C to Ftg.  
Copper Tube, 1/2" x 18 1/2"  
Elbow, 1/2", 90° C to MSPS  
04730-217-01-10  
04730-011-59-53  
04730-411-25-01  
04810-011-72-67  
04810-100-09-18  
04730-412-05-01  
04730-406-31-01  
05700-011-44-34  
04730-406-32-01  
JP-24 Technical Manual 7610-002-49-79 Rev. D  
Issued: 03-06-2006 Revised: N/A  
39  
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SECTION 6: PARTS SECTION  
RINSE STIFFENER/RINSE HUB WELDMENT  
Rinse Tube Stiffener  
05700-011-44-32  
Connects to  
Rinse Injector  
Clamp, Hose  
04730-719-06-09  
Connects to  
Rinse Stiffener  
Hose, 3/4” x 8 1/2”  
05700-011-38-83  
Rinse Hub Weldment  
05700-021-38-31  
Vellumoid Rinse Gasket  
05330-111-42-81  
JP-24 Technical Manual 7610-002-49-79 Rev. D  
Issued: 03-06-2006 Revised: N/A  
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SECTION 6: PARTS SECTION  
RINSE SOLENOID VALVE & VACUUM BREAKER REPAIR PARTS KITS/WATER PRESSURE REGULATOR KIT OPTION  
Screw  
Data Plate  
Cap Screw  
Coil & Housing  
Data Plate  
Valve Bonnet  
Spring & Plunger Kit  
06401-003-07-40  
Cap  
Spring position is moved  
for clarity.  
Goes below the plunger.  
Cap Retainer  
O-Ring & Diaphragm  
06401-003-07-41  
Diaphragm  
Retainer  
O-Ring  
Plunger  
Body  
Components of  
Repair Kit  
06401-003-06-23  
Screen  
Retainer  
Mesh Screen  
Valve Body  
Complete Vacuum Breaker Assembly, 1/2” NPT  
04820-003-06-13  
Complete 110 Volt Solenoid Valve Assembly, 1/2”  
04810-100-12-18  
Complete WPRK Assembly  
05700-002-64-67  
Coil & Housing only, 1/2”  
06401-003-07-43  
Water Hammer Arrestor,  
1/2" NPT  
06685-100-05-00  
Complete 220 Volt Solenoid Valve Assembly, 1/2”  
04810-100-09-18  
Coil & Housing only, 1/2”  
06401-003-07-44  
Close Nipple, 1/2”  
04730-207-15-00  
Tee, 1/2” x 1/2” x 1/2”  
04730-211-27-00  
JP-24 Technical Manual 7610-002-49-79 Rev. D  
Issued: 03-06-2006 Revised: N/A  
41  
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SECTION 6: PARTS SECTION  
DRAIN VALVE ASSEMBLY  
3
4
1
11  
10  
5
16  
17  
15  
13  
18  
3
14  
6
12  
8
7
9
ITEM QTY  
DESCRIPTION  
Mfg. No.  
1
1
Diverter Valve Assembly, 115 Volt  
Diverter Valve Assembly, 220 Volt  
Valve, With Brackets  
Hosebarb, 1” x 3/4” NPT Polypropylene  
Hosebarb, 90° 1” x 3/4” NPT  
Plate, Motor Mounting Weldment  
Tricnut, 10-32 AK Fastener, S/S  
Lockwasher, #10 External Tooth  
Grommet, Heyco  
Cam Weldment  
Plate, Dielectric  
Switch, Micro  
Screw, 4-40 x 5/8"  
Motor, Chemical Feeder Pump 14 RPM 115 Volt  
Motor, Chemical Feeder Pump 14 RPM 220 Volt  
Terminal, Ground Spade  
Locknut, 10-32 S/S Hex with Nylon Insert  
FW-Valve, Cover  
Screw, 10-32 x 3/8” Truss Head  
Decal, Warning-Disconnect Power  
Screw, Mounting  
06401-012-23-21  
06401-022-23-21  
05700-002-23-28  
04730-011-65-86  
04730-011-65-87  
05700-031-96-02  
05340-111-58-10  
05311-273-02-00  
05975-210-03-00  
05700-011-65-78  
05700-011-65-80  
05930-011-65-81  
05305-011-49-70  
04320-111-35-13  
04320-011-79-34  
05940-011-75-70  
05310-373-02-00  
05700-031-65-70  
05305-173-12-00  
09905-100-75-93  
05305-011-93-30  
1
2
3
4
5
6
7
8
1
1
1
1
4
1
1
1
1
1
2
1
1
1
4
1
4
1
4
9
10  
11  
12  
12  
13  
14  
15  
16  
17  
18  
JP-24 Technical Manual 7610-002-49-79 Rev. D  
Issued: 03-06-2006 Revised: N/A  
42  
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SECTION 6: PARTS SECTION  
DRAIN PLUMBING ASSEMBLY  
1
2
7
8
9
1
3, 10  
4
5
6
6
ITEM QTY  
DESCRIPTION  
Mfg. No.  
1
2
3
4
4
5
6
7
8
9
10  
3
1
2
1
1
1
1
2
2
1
2
Clamp, 3/16” to 1 1/2”  
Hose, Formed Drain  
Bolt, 10-32 x 1/2” Slotted Truss Head  
Diverter Valve Assembly, 115 Volt  
Diverter Valve Assembly, 220 Volt  
Clamp, 11/16” to 1 1/4”  
Hose, 1” I.D. x 10 Feet Long  
Locknut, 1/4”-20 S/S Hex with Nylon Insert  
Bolt, 1/4”-20 x 1/2” Long  
04730-719-06-09  
04720-121-40-36  
05305-173-04-00  
06401-012-23-21  
06401-022-23-21  
04730-002-18-40  
05700-011-39-72  
05310-374-01-00  
05305-274-02-00  
05700-021-66-37  
05311-273-02-00  
Bracket, Valve Mounting with Tricnuts  
Washer, #10 External Tooth Star  
JP-24 Technical Manual 7610-002-49-79 Rev. D  
Issued: 03-06-2006 Revised: N/A  
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SECTION 6: PARTS SECTION  
WASH MOTOR TO WASH TUB ASSEMBLY  
Hub, Discharge Machined  
05700-021-37-90  
Gasket, 2” O.D. x 1 1/2” I.D. x 1/16”  
05330-200-23-00  
Nut, Jam 1 1/2”-12 NPT  
05700-000-86-23  
Hose Clamp, 1 5/16" - 2 1/4" #28  
4 per assembly  
04730-719-01-37  
Hose,1 1/4” x 2 1/4” Reinforced  
05700-011-44-48  
Gasket, Suction Adapter  
05330-021-40-87  
2
1 See Chart Below  
3
Casting, Suction Adapter  
09515-031-39-86  
Washer, S/S 1/4”-20 I.D.  
05311-174-01-00  
Locknut, 1/4”-20 S/S  
05310-374-01-00  
Hose, Bottom  
Manifold Pump  
05700-001-22-92  
Locknut, 1/4”-20 S/S  
05310-374-01-00  
Washer, 1/4” I.D. x 3/4” O.D. S/S  
05311-011-76-30  
ITEM QTY  
DESCRIPTION  
Mfg. No.  
1
1
1
1
1
1
Motor, Wash, 115/230 V, 60 HZ, Complete  
Motor, Only  
06105-131-50-93  
06105-021-44-03  
Motor, Wash, 115/230 V, 50 HZ, Complete  
Motor, Only  
06105-002-14-93  
06105-003-19-78  
Motor, Wash, 460 V, 60 HZ, Complete  
Motor, Only  
Pump Mounting Bracket  
06105-121-60-06  
06105-002-64-03  
05700-002-42-85  
05930-021-44-07  
2
3
1
1
Pump Casing, Iron  
The following items are not shown and are the same for each motor assembly.  
Iron Adapter  
Impeller  
Drain Cock  
Mechanical Seal  
Gasket, 4.75” x 4.09” x 1/16”  
Gasket, 4.75” x 4.09” x 1/64”  
04730-002-42-84  
04320-021-44-02  
04730-002-43-21  
05330-011-44-06  
05330-111-59-90  
05330-002-42-86  
JP-24 Technical Manual 7610-002-49-79 Rev. D  
Issued: 03-06-2006 Revised: N/A  
44  
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SECTION 6: PARTS SECTION  
RINSE TANK & COMPONENTS/STRIP HEATER KIT  
Rinse Tank Weldment  
05700-031-38-09  
JP-24B/BFRINSE TANK  
Dielectric Cover  
(Not Shown)  
05700-011-40-50  
Fitting, 1/4” Imperial Brass  
05310-924-02-05  
Thermostat, Rinse Tank  
05930-510-03-79  
Kit, Rinse Thermostat Replacement  
(Includes: thermostat, brass fitting,  
2 jumper wires & instructions)  
06401-011-66-55  
Locknut, 1/4”-20 S/S  
Hex with Nylon Insert  
05310-374-01-00  
Gasket, Heater  
05330-011-47-79  
Nut, 5/16”-18 S/S Hex  
05310-275-01-00  
Thermostat, High Limit (460 Volt Unit only)  
05930-011-49-43  
Lockwasher, 5/16” Split  
05311-275-01-00  
High Limit Thermostat Mounting Bracket  
05700-011-81-64  
The JPX-300H/HC/HN models covered in this manual come supplied with various heaters, depending on the characteristics  
of the machine. To ensure that you order the correct heater for the model you are servicing, please refer to the following table:  
40°F Rise  
70°F Rise  
Model  
Volts  
Hz  
Phase  
Rinse Heater (8.2 KW)  
Rinse Heater (10 KW)  
JPX-300H  
JPX-300H  
208  
230  
50  
50  
1
1
04540-111-43-21  
04540-111-43-21  
04540-021-62-57  
04540-021-62-57  
JPX-300H  
JPX-300H  
JPX-300H  
208  
230  
460  
60  
60  
60  
1
1
3
04540-111-43-21  
04540-111-43-21  
04540-111-51-46  
04540-021-62-57  
04540-021-62-57  
04540-002-29-82  
Wash Tank Heater (1.2 KW, 115 Volt)  
04540-002-39-37  
JP-24/JP-24F WASH HEATER KIT  
Wash Tank Heater (1.2 KW, 240 Volt)  
04540-021-41-18  
Wash Tank Heater (2 KW, 240 Volt)  
04540-002-55-28  
Tank Plate  
05700-021-46-53  
Secured with: Locknut, 1/4”-20 S/S  
Hex with Nylon Insert  
05310-374-01-00  
White Leads on Outside  
Black Leads in Center  
Black Leads  
JP-24 Technical Manual 7610-002-49-79 Rev. D  
Issued: 03-06-2006 Revised: N/A  
45  
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SECTION 6: PARTS SECTION  
DOOR ASSEMBLY  
Order this entire assembly using 05700-011-39-15  
To order the Operation/Instruction Decal  
09905-021-41-49  
15  
2
14  
11  
6
5
8
7
9
18  
13  
12  
1
4
10  
3
16  
17  
ITEM  
1
2
3
4
5
6
7
8
QTY  
DESCRIPTION  
Door Handle, S/S  
Seal Channel, Inner Door, Left  
Kit, Outer Door with Tricnuts  
Right Hinge Assembly Weldment  
Spray Baffle  
Left Hinge Assembly Weldment  
Spacer, Hinge UHMW  
Fastener, Screw, 1/4"-20 x 1-1/2" Long  
Hinge Retaining Plate Assembly  
Baffle, Door  
Seal Channel, Inner Door, Right  
Latch Assembly  
Inner Door  
Seal Channel, Inner Door, Top  
Fastener, Screw, 10-32 Counter Sink, 1/2" Long  
Striker, Door Switch  
Fastener, Screw 10-32 x 1/2" Long  
Locknut, 10-32, S/S Hex with Nylon Insert  
Mfg. No.  
1
1
1
1
1
1
2
6
2
1
1
1
1
1
12  
1
2
2
05340-011-60-25  
05700-031-32-89  
06401-003-19-59  
05700-021-38-75  
05700-031-37-56  
05700-021-38-76  
05700-011-44-23  
05305-011-44-50  
05700-011-44-37  
05700-001-44-75  
05700-031-32-91  
05700-011-44-41  
05700-031-32-85  
05700-031-32-90  
05305-011-44-51  
05700-011-44-24  
05305-011-44-52  
05310-373-02-00  
9
10  
11  
12  
13  
14  
15  
16  
17  
18  
JP-24 Technical Manual 7610-002-49-79 Rev. D  
Issued: 03-06-2006 Revised: N/A  
46  
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SECTION 6: PARTS SECTION  
MISCELLANEOUS DOOR SUB-ASSEMBLIES  
Door Latch Assembly  
05700-011-44-41  
Door Latch Casting  
05700-011-44-40  
Latch Spring  
05700-011-44-39  
Latch Roller  
05700-011-44-38  
Hinge Retaining Plate  
05700-011-44-37  
Switch Plate  
05700-011-44-22  
Door Switch  
05930-303-38-00  
Door Spring  
05340-011-44-58  
Stop, Left Hinge  
05700-021-37-67  
Stop, Right HInge  
05700-021-37-68  
Hinge Components secured with:  
Locknut, 1/4”-20 S/S Hex with Nylon Insert  
05310-374-01-00  
Cover, Left Hinge Weldment  
05700-002-18-41  
Cover, Right HInge Weldment  
05700-002-18-42  
JP-24 Technical Manual 7610-002-49-79 Rev. D  
Issued: 03-06-2006 Revised: N/A  
47  
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SECTION 6: PARTS SECTION  
RINSE ARM & WASH ARM ASSEMBLIES  
Rinse Arm Assembly  
(Applies to the JP-24B/JP-24BF units only)  
Plug, Rinse Arm  
04730-609-04-00  
05700-031-39-21  
Rinse Arm  
05700-031-38-30  
Bearing  
03120-002-72-24  
Bushing, Rinse Head  
05700-021-33-84  
Washer, Rinse Arm  
05330-011-42-10  
Ring, Retaining  
05340-112-01-11  
O-ring (Not Shown)  
05330-002-60-69  
Wash Arm Assembly  
05700-021-39-23  
Wash Arm Weldment  
05700-021-46-58  
Bearing Assembly  
05700-021-35-97  
O-ring (Not Shown)  
05330-002-60-69  
JP-24 Technical Manual 7610-002-49-79 Rev. D  
Issued: 03-06-2006 Revised: N/A  
48  
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SECTION 6: PARTS SECTION  
FRAME & PANEL COMPONENTS/MISCELLANEOUS PARTS  
Strainer Spacer  
05700-021-35-83  
Attaches with:  
Nut, Nylon Wing, 1/4”-20  
05310-994-01-00  
Strainer Weldment  
05700-031-35-81  
Back Panel  
05700-031-44-33  
Guide, Left Rack  
05700-031-37-89  
Guide, Right Rack  
05700-031-37-88  
Shroud Weldment  
05700-031-38-15  
Secured with 10-32 x 1/2”  
Long Screws  
The swivel feet used on the  
frames may be ordered using  
05305-173-04-00  
05340-108-02-00  
Top Panel  
05700-041-38-38  
The dress panels are secured with 10-32 x 1/2” Truss  
Head Screws, 05305-011-39-36  
Right Frame Weldment  
05700-011-73-86  
Left Frame Weldment  
05700-011-73-85  
Left Dress Panel  
05700-041-38-37  
Right Dress Panel  
05700-041-38-08  
JP-24 Technical Manual 7610-002-49-79 Rev. D  
Issued: 03-06-2006 Revised: N/A  
49  
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SECTION 6: PARTS SECTION  
CYCLE COUNTER RETROFIT KIT  
To order the complete Cycle Counter Retrofit Kit with hardware,  
use part number 06401-002-95-14.  
Template, Cycle Counter Mount  
05700-002-94-37  
Instructions for Adding Cycle Counter to JP-24 Undercounter Dish Machine  
1. Locate the template on the front of the plastic control panel in the approximate location as  
shown in the diagram below.  
2. Use a 3/32” diameter drill bit to drill the four mounting holes through the plastic control  
panel.  
3. Mount the template to the front of the control panel using the screws and locknuts provided.  
4. Using the template as a guide, cut the 1-3/8” x 1-1/8” cutout (the inside of the template) from  
the plastic control panel. Use a Dremel tool (or similar) or drill multiple holes along the edge  
of the template in order to cut away the cutout.  
5. Remove the template from the control panel.  
Cycle Counter Mount  
05700-002-94-36  
6. Assemble the counter (with mounting plate) to the control panel using the four screws and  
locknuts provided.  
7. One lead wire from the counter is connected together with the blue wires from the fill  
solenoid valve and the rinse/fill light (using the existing wire nut that connects these two  
wires together).  
8. The other lead wire from the counter is connected together with the red wires from the fill  
solenoid valve and the rinse/fill light (using the existing wire nut that connects these two  
wires together).  
9. The counter should increment each time the fill solenoid valve is turned on.  
Cycle Counter, 240V  
05990-111-47-42  
Instruction Sheet  
05700-002-95-15  
JP-24 Technical Manual 7610-002-49-79 Rev. D  
Issued: 03-06-2006 Revised: N/A  
50  
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SECTION 7:  
ELECTRICAL SCHEMATICS  
51  
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SECTION 7: ELECTRICAL SCHEMATICS  
JP-24/JP-24F 208-230 VOLT - 50/60 HERTZ - SINGLE PHASE  
JP-24 Technical Manual 7610-002-49-79 Rev. D  
Issued: 03-06-2006 Revised: N/A  
52  
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SECTION 7: ELECTRICAL SCHEMATICS  
JP-24B/JP-24BF 208-230 VOLT - 50/60 HERTZ - SINGLE PHASE  
JP-24 Technical Manual 7610-002-49-79 Rev. D  
Issued: 03-06-2006 Revised: N/A  
53  
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SECTION 7: ELECTRICAL SCHEMATICS  
JP-24B/JP-24BF 460 VOLT - 60 HERTZ - THREE PHASE  
JP-24 Technical Manual 7610-002-49-79 Rev. D  
Issued: 03-06-2006 Revised: N/A  
54  
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