Moyer Diebel 301-HT Service Manual

Simply Engineered Better

Technical Manual

Undercounter Dishwasher

Model

301HT

High Temperature with Built-in Booster

February, 2004

P. O. Box 4183 Winston-Salem, North Carolina 27115-4149 336/661-1992 Fax: 336/661-1660

Machine Serial No.

Manual P/N 113648 RevD

2674 N. Service Road

Jordan Station, Ontario, Canada L0R 1S0

905/562-4195 Fax: 905/562-4618

www.moyerdiebel.com

Complete the information below for quick reference.

Model Number Serial Number

Voltage and Phase

Moyer Diebel Parts Supplier Phone

Moyer Diebel Service Agency Phone

Moyer Diebel Service:

Moyer Diebel (USA) Moyer Diebel Limited (Canada)

Phone: 1 (336) 661-1556 Phone: 1 (905) 562-4195

1 (800) 858-4477 1 (800) 263-5798

Fax: 1 (336) 661-1660 Fax: 1 (905) 562-4618

Note: When calling to order parts, be sure to have the model number, serial number,

voltage and phase of your machine.

AFTER S/N 45420

Machine Data Plate with model & serial number located on the lower left side of the machine.

S/N 45368-45419

Machine Data Plate with model & serial number located on the lower right side of the machine.

LIMITED WARRANTY

Limited Warranty

Moyer Diebel, P.O. Box 4183, Winston-Salem, North Carolina 27115, and P. O. Box 301, 2674 North Service Road, Jordan Station, Ontario, Canada L0R 1S0 warrants machines, and parts, as set out below.

Warranty of Machines: Moyer Diebel warrants all new machines of its manufacture bearing the name

“Moyer Diebel” and installed within the United States and Canada to be free from defects in material and workmanship for a period of one (1) year after the date of installation or fifteen (15) months after the date of shipment by Moyer Diebel, whichever occurs first. [See below for special provisions relating to Model Series DF and SW.] The warranty registration card must be returned to Moyer Diebel within ten (10) days after installation. If warranty card is not returned to Moyer Diebel within such period, the warranty will expire after one year from the date of shipment.

Moyer Diebel will not assume any responsibility for extra costs for installation in any area where there are

jurisdictional problems with local trades or unions.

If a defect in workmanship or material is found to exist within the warranty period, Moyer Diebel, at its election, will either repair or replace the defective machine or accept return of the machine for full credit; provided, however, as to Model Series DF and SW, Moyer Diebel’s obligation with respect to labor associated with any repairs shall end (a) 120 days after shipment, or (b) 90 days after installation, whichever occurs first. In the event that Moyer Diebel elects to repair, the labor and work to be performed in connection with the warranty shall be done during regular working hours by a Moyer Diebel authorized service technician. Defective parts become the property of Moyer Diebel. Use of replacement parts not authorized by Moyer Diebel will relieve Moyer Diebel of all further liability in connection with its warranty. In no event will Moyer Diebel’s warranty obligation exceed Moyer Diebel’s charge for the machine. The following are not covered by Moyer Diebel’s warranty:

a. Lighting of gas pilots or burners.

b. Cleaning of gas lines.

c. Replacement of fuses or resetting of overload breakers.

d. Adjustment of thermostats.

e. Adjustment of clutches.

f. Opening or closing of utility supply valves or switching of electrical supply current.

g. Adjustments to chemical dispensing equipment.

h. Cleaning of valves, strainers, screens, nozzles, or spray pipes.

i. Performance of regular maintenance and cleaning as outlined in operator’s guide.

j. Damages resulting from water conditions, accidents, alterations, improper use, abuse,

tampering, improper installation, or failure to follow maintenance and operation procedures.

Examples of the defects not covered by warranty include, but are not limited to: (1) Damage to the exterior or

interior finish as a result of the above, (2) Use with utility service other than that designated on the rating

plate, (3) Improper connection to utility service, (4) Inadequate or excessive water pressure, (5) Corrosion

from chemicals dispensed in excess of recommended concentrations, (6) Failure of electrical components due

to connection of chemical dispensing equipment installed by others, (7) Leaks or damage resulting from such

leaks caused by the installer, including those at machine table connections or by connection of chemical dis-

pensing equipment installed by others, (8) Failure to comply with local building codes, (9) Damage caused by

labor dispute.

Warranty of Parts: Moyer Diebel warrants all new machine parts produced or authorized by Moyer Diebel to be

free from defects in material and workmanship for a period of 90 days from date of invoice. If any defect in material and workmanship is found to exist within the warranty period Moyer Diebel will replace the defective part without charge.

DISCLAIMER OF WARRANTIES AND LIMITATIONS OF LIABILITY. MOYER DIEBEL’S WARANTY IS ONLY TO THE EXTENT REFLECTED ABOVE. CHAMPION MAKES NO OTHER WARRANTIES, EXPRESS OR IMPLIED, INCLUDING, BUT NOT LIMITED, TO ANY WARRANTY OF MERCHANTABILITY, OR FITNESS OF PURPOSE. MOYER DIEBEL SHALL NOT BE LIABLE FOR INCIDENTAL OR CONSEQUENTIAL DAMAGES. THE REMEDIES SET OUT ABOVE ARE THE EXCLUSIVE REMEDIES FOR ANY DEFECTS FOUND TO EXIST IN MOYER DIEBEL DISHWASHING MACHINES AND MOYER DIEBEL PARTS, AND ALL OTHER REMEDIES ARE EXCLUDED, INCLUDING ANY LIABILITY FOR INCIDENTALS OR CONSEQUENTIAL DAMAGES.

Moyer Diebel does not authorize any other person, including persons who deal in Moyer Diebel Dishwashing Machines to change this warranty or create any other obligation in connection with Moyer Diebel Dishwashing Machines.

iii

FIV

FOREWORD

1. Read the instructions in this manual carefully. It contains important information on installation, operation, and safety.

2. Store this manual carefully for future reference.

3. After removing packing material, check for loose parts in dishracks.

4. Before switching the equipment on, make sure that the model data plate conforms to the electrical and water requirements supplied to this particular machine.

5. Installation should be carried out by qualified personnel according to the manufacturers instructions. The installation of your machine must meet all applicable health and safety codes.

6. This equipment should be used for its intended purpose. Any other application should be considered improper and therefore dangerous.

7. Only trained personnel should operate this equipment.

8. Operators must strictly follow all hygienic requirements in the handling of clean dishware or cutlery.

9. Do not leave the machine in an environment at temperatures lower than 0°C/32°F.

10. This machine should not be washed with a direct water stream.

11. Only qualified personnel should access the control panel after disconnecting main power supply. Tag the disconnect indicating work is being performed on that circuit.

12. Noise level of the machine is less than 67dB.

The manufacturer declines any responsibility for any printing errors contained in this booklet.

The manufacturer also reserves the right to make any modifications to its products that do not affect the basic characteristics thereof.

TABLE OF CONTENTS

TABLE OF CONTENTS PAGE

Revision Record........................................................................................................... i

Limited Warranty......................................................................................................... iii

Forward........................................................................................................................ iv

INSTALLATION ............................................................................ 1

OPERATION ................................................................................. 5

MAINTENANCE ........................................................................... 7

REPLACEMENT PARTS ............................................................... 13

ELECTRICAL SCHEMATICS ........................................................ 39

LIST OF FIGURES

Figure 1 – Control Panel Detail ............................................................................... 5

Figure 2 – Power Switch Position ............................................................................ 7

Figure 3 – Drain Switch Position ............................................................................. 7

Figure 4 – Hood and Tank ........................................................................................ 14

Figure 5 – Door Assembly ....................................................................................... 16

Figure 6 – Wash and Rinse Arms............................................................................. 18

Figure 7 – Tank Components ................................................................................... 20

Figure 8 – Rinse Aid Dispenser ............................................................................... 22

Figure 9 – Wash and Rinse Spray Arms .................................................................. 24

Figure 10 – Wash and Rinse Piping ........................................................................... 26

Figure 11 – Pump/Motor Assembly ........................................................................... 28

Figure 12 – Booster Assembly .................................................................................. 30

Figure 13 – Fill Piping Assembly .............................................................................. 32

Figure 14 – Control Panel .......................................................................................... 34

Figure 15 – Control Cabinet ....................................................................................... 36

INSTALLATION

GENERAL

This manual covers the Moyer Diebel 301 undercounter high temperature dishwashing machine with built-in booster. Liquid detergent and rinse aid dispensing pumps are standard. Even though chemical dispensing settings are preset at the factory for average water conditions, to ensure maximum performance and best results, have your chemical supplier perform a water titration test and adjust dispensing pumps for your specific water conditions.

INSTALLATION AND MAINTENANCE

The following instructions are addressed to qualified personnel. Repairs should be performed by authorized personnel using parts supplied by the manufacturer.

NOTE:

Installation must allow for the ability to remove machine for servicing.

UNPACKING

WARNING:

Care should be taken when lifting the machine to prevent damage.

The machine is normally shipped on a skid enclosed by straps. When transporting the machine, use a lift truck or fork lift, positioning the box properly on the forks.

1. Immediately after unpacking your machine, inspect for any shipping damages. If damage is found, save the packing material and contact the carrier immediately.

2. Remove the dishwasher from the skid. Adjust the feet if required, then move the machine to its permanent location.

3. Level the machine (if required) by placing a level on the top if the machine and adjusting the feet. Level the machine front-to-back and side-to-side.

4. Remove any foreign material from inside of the machine.

CAUTION:

After locating your machine, it must meet with all local health codes. Consult your local health department representative to ensure compliance.

INSTALLATION

INSTALLATION (CONT.)

ELECTRICAL CONNECTIONS

NOTE:

Leave enough electrical cable behind the machine so that the dishwasher can be pulled forward a minimum of two feet to be serviced.

WARNING:

Electrical and grounding connections must comply with the National Electrical Code and/or Local Electrical Codes.

WARNING:

When working on the dishwasher, disconnect the electric service and tag it to indicate work is being done on that circuit.

1. The electrician should compare the electrical specifications on the machine electrical data plate (located in the control panel) to the electrical power supply before connecting the machine to the incoming service at a fused disconnect switch.

NOTE:

The 208-240V/60Hz/1PH electrical supply service for this machine must be a 2-wire plus ground service. For optional 208-240V/60Hz/3PH the electrical supply service must be a 3wire plus ground service.

2. On the 208V-240V models, a knockout is provided at the rear of the junction box for electrical service connections. A fused disconnect switch or circuit breaker (supplied by user) is required to protect each power supply circuit.

PLUMBING CONNECTIONS

CAUTION:

Plumbing connections must comply with local health and plumbing codes.

Water Connections

1. Connect the hot water supply to the fill hose provided with a 3/4" NPT fitting.

2. Install a manual shut-off valve in the water supply line to accommodate servicing the machine. The shut-off valve should be the same size or larger than the supply line.

3. Install a 3/4" pressure reducing valve (PRV) (supplied with machine) in the water supply line, and set at 22PSI/151kPa.

INSTALLATION

INSTALLATION (CONT.)

PLUMBING CONNECTIONS (CONT.)

Drain Connections

1. Drain hose must be supported by bracket provided (shipped inside of machine).

2. The drain hose bracket must be mounted a minimum of 2 feet above the finished drain, either on the rear of the machine or on the wall.

3. The maximum height of the drain from the floor must not exceed 3 feet.

4. Connect the 3/4"I.D. flexible reinforced drain hose to a 1-1/2" wye (Y) drain fitting. Use a 3/4" hose adapter (supplied by others). Do not connect drain hose to a 90° drain fitting.

DETERGENT

The machine is equipped with an automatic detergent dispensing pump system.

1. Use a qualified detergent/chemical supplier for your detergent and rinse aid needs.

2. Your machine is supplied with a detergent dispensing pump that is internally wired and ready for use. Use a commercial grade liquid detergent and insert the red pickup tube into the detergent container. The pickup tube has a strainer on the end to prevent the crystallized chemical from clogging the supply lines.

CAUTION:

Always wash the hands under running water if they come into contact with the detergent and comply with the specific instructions pertaining to the specific type of detergent.

NOTE:

A nonchlorinated detergent is recommended for your dishwasher.

To prime the peristaltic pump:

1. Insert pump inlet hose into the detergent container.

2. Close machine door and switch machine on.

3. Allow wash tank to fill and run machine cycles until chemical enters machine.

RINSE AID

1. Use a qualified/chemical supplier for your rinse aid needs.

2. Insert the transparent tube into the container containing the rinsing agent.

3. Prime the rinse aid pump while machine is in cycle by pressing and depressing power button until the transparent tube has completely filled.

3. Start the machine as described the "OPERATION SUMMARY" on page 5. The dispenser will pump about 3cc of liquid from the container.

INSTALLATION

INSTALLATION (CONT.)

COMPLETING THE INSTALLATION

1. Recheck for and remove any foreign materials from inside the machine.

2. Center the scrap screens over the sump opening

3. After Plumbing and electrical connections are completed, check machine for water leaks by

closing the door, then depressing the ON switch. This allows the tank to begin filling and to reach temperature.

4. Open the door and check the water level. The water level should be a two inches above the scrap screen.

5. Close the door (the machine has a door safety switch and will not start until the door is closed.

OPERATION

OPERATION SUMMARY

The following is a summary of your model 301HT dishwasher operating cycle:

1. The door must be closed to begin the cycle.

2. Pressing the POWER button begins to fill the wash

tank.

3. When the correct water level has been reached the booster heater comes on.

4. Press and holding the START button starts the cycle.

5. The pump runs during the wash cycle for approximately 120 seconds. The wash cycle duration is extended if the booster water temperature does

not reach 180°F/82°C

6. After a 5 second pause, the fill valve opens and the rinse cycle starts.

7. The machine rinses for 15 seconds. The cycle light turns off after 7 seconds indicating that the cycle is complete. DO NOT open the door until the cycle lamp turns off.

Figure 1-Control Panel

8. Open the door and remove the rack of clean ware.

OPERATION PROCEDURES

The operation of your dishwasher will be more efficient when these procedures are followed:

1. Check that the spray arms, overflow tube and scrap screens are in place.

2. Close the door. Press the POWER switch. The tank will begin to fill with water.

This procedure is only needed when the tank is empty.

3. When the tank is full, check the wash tank temperature gauge. Minimum wash temperature is 66°C/150°F.

4. Scrap and preflush all items to be washed, load items into rack. Wash only one layer of silverware in a rack at a time.

NOTE:

DO NOT OVERLOAD the rack.

5. Open the door and insert the rack into the machine.

6. Close the door . Press the START switch and hold for 1 second, then release. This will start the wash cycle. The cycle lamp will light and will remain on until the entire wash/rinse cycle has completed.

NOTE:

The machine may be stopped at any time during the cycle by opening the door. Closing the door resumes from the point where it was interrupted in the cycle.

OPERATION

OPERATIONS (CONT.)

MAINTENANCE

7. Check the rinse temperature during the final rinse. The final rinse must be 82°C/180°F minimum.

8. When the green cycle light turns off, the cycle is complete.

9. Open the door and remove the rack.

10. Repeat steps 4-9 for additional cycles. Machine operation is automatic.

11. Clean the scrap screens after every meal period. During heavy usage, the scrap screens should be cleaned more frequently.

CAUTION:

Poor machine performance and/or damage to the machine can occur if the scrap screens

become clogged with soil or waste particles.

12. At the end of the day, any water in the tank should be drained pressing the POWER button to turn machine off and remove the overflow tube. Then press the DRAIN switch to activate the drain pump and completely drain the machine.

CAUTION:

DO NOT LEAVE WATER IN THE TANK OVERNIGHT. Water left in the tank overnight will allow chemicals to deteriorate the tank.

MAINTENANCE

The efficiency and life of your machine in increased be regularly scheduled preventive maintenance. A well maintained machine gives better results and service. An investment of a few minutes of daily maintenance will be worthwhile.

The best maintenance you can provide is to keep your machine clean. Should poor results occur: first drain, next clean the machine as described below in the Daily-Every 8 Hours procedure, then refill.

Intervals shown in the following schedules represent an average length of time between necessary maintenance. Maintenance intervals should be shortened whenever your machine is faced with abnormal working conditions, hard water, or multiple shift operations.

CLEANING SCHEDULE

•Meal Periods

1. Press power switch OFF (See Fig.2).

2. Remove the overflow the press and hold

the DRAIN switch to drain the machine. (See Fig. 3)

3. Wipe the interior to remove any debris.

4. Clean the screens after every meal period and more frequently during heavy usage. Do not allow screens to become clogged with debris.

5. Inspect wash and rinse arms. Clean if necessary.

6. Replace overflow tube.

7. Close door.

8. Press the POWER button to refill machine. (See Fig. 2).

Figure 2- Power Switch Position

Figure 3- Drain Switch Position

•Daily-Every 8 Hours

1. Remove the overflow tube and press the POWER switch to OFF (see Fig. 2) to drain the tank.

2. Press and hold the DRAIN switch (see Fig. 3) to activate the drain pump and drain all the

water from the machine.

3. Open the door and remove both the upper and lower spray arms by unscrewing the knurled fastener holding each arm.

4. Remove the scrap screen carefully to keep the debris from falling into the sump.

5. Clean the inside of the tank with clean water.

6. At a remote sink, back flush the screens until clean. Do not strike against solid objects.

7. Clean the wash and arms to remove any debris from the spray openings. Do not strike the arms against solid objects.

8. Reinstall the scrap screens, overflow tube and the spray arms.

9. Leave the door open overnight to allow drying.

10. Report any unusual conditions to your supervisor.

MAINTENANCE

MAINTENANCE (CONT.)

CLEANING SCHEDULE (CONT.)

•As Required

1. Check temperature gauge readings. Replace as necessary.

2. Check chemical supplies and refill as necessary.

•Weekly

1. Inspect all water lines for leaks and tighten any joints of required.

2. Clean all detergent residue from exterior of machine.

3. Check drain for leaks.

4. Clean any accumulated scale from the heating element.

5. Remove and closely inspect each spray arm for any blockage.

6. Check for any damage to scrap screen. Ineffective screening can cause wash system failures.

7. Clean the detergent, and rinse aid supply tubes. Complete the following procedure:

a. Remove the detergent and rinse aid pick up tubes from the containers. Place the tubes into

a container of hot water.

b. Remove the pick up tubes from the hot water and reinsert them into the correct chemical

containers (red-detergent, clear-rinse aid). Repeat the original priming procedures to ensure that the chemicals have filled the tubes for the next operating period.

c. Run a complete cycle to flush chemicals from the tank.

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