Moyerdiebel 301HT Manual

Undercounter
Dishwasher
Models:
301HT M2
High temperature sanitizing
dishwasher with built-in
stainless steel electric booster
Installation Manual with Service Replacement Parts
2674 N. Service Road, Jordan Station
Ontario, Canada L0R 1S0
905/562-4195 Fax: [phone]
Toll-free: 800/263-5798
P.O. Box 4183
Winston-Salem, NC 27115
336/661-1992 Fax: [phone]
Toll-free: 800/858-4477
Issue Date: 06.21.07
Manual P/N 114150 rev.A
Printed in the USA
File: DTMMD0405.6
Dishwasher serial no.
www.moyerdiebel.com Beginning with S/N 61017 and above
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COPYRIGHT © 2006 All rights reserved Printed in the USA
For future reference, record your dishwasher information in the box below.
Model Number__________________________ Serial Number_______________________
Voltage________________Hertz_____________ Phase__________________
Moyer Diebel Service Agent __________________________________ Tel:______________________
Moyer Diebel Parts Distributor _________________________________ Tel:______________________
ATTENTION:
The dishwasher model no., serial no., voltage,
Hz and phase are needed to identify your
machine and to answer questions.
Please have this information on-hand
if you call for service assistance.
We support
National Service Department
In Canada: In the USA:
Toll-free: 800/263-5798 Toll-free: 800/858-4477
Tel: [phone] Tel: [phone]
Fax: [phone] Fax: [phone]
email: [email protected] email: [email protected]
For all models:
The data plate with model &
serial number mounts to the
lower right side of the machine.
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ATTENTION:
Complete the back of the
POSTAGE PAID WARRANTY CARD
below, then cut along the dashed lines
and mail immediately to make sure your
dishwasher warranty is activiated.
NO POSTAGE
NECESSARY
IF MAILED
IN THE
UNITED STATES
BUSINESS REPLY MAIL
FIRST-CLASS MAIL PERMIT NO. 2101 WINSTON-SALEM, NC
POSTAGE WILL BE PAID BY ADDRESSEE
MOYER DIEBEL PO BOX 4183 WINSTON-SALEM, NC 27119-0981
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WARRANTY REGISTRATION CARD
MODEL SERIAL #
Date of Installation:________________________ Owner’s Location: Company_________________________________________________________ Address_______________________________________________________ Address_______________________________________________________ Telephone_____________________________________________________ Contact Name__________________________________________________ Purchased from: Dealer_________________________________________________________ Telephone_____________________________________________________ Contact Name__________________________________________________ Note: in USA this card must be returned to validate warranty.
IMPORTANT IMPORTANT
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301HT –Revisions to this manual
i
Revisions to this manual
Revision Revised Serial Number Revision
Date Pages Effectivity Description
04.15.06 All 61017 Released first edition
n This is where we record changes to the manual. A revision might be a part number change,
new instructions, or information that was not available at the time of printing.
n We reserve the right to make changes to this manual without notice and without incurring
any liability by making the changes.
n Dishwasher owners may request a revised manual, at no charge, by calling
1 [phone] in the USA or 1 [phone] in Canada.

Dear Owner:
Thank-you for choosing our dishwasher.
We appreciate your business.
This manual covers model:
301HT Undercounter high temperature dishwashing machine
with 40°F/23°C or 70°F/39°C rise built-in booster.
The installation, and initial start-up of your dishwasher
must be performed by qualified electricians, plumbers,
and authorized service technicians who are trained in
commercial dishwashers.
Defects and repairs resulting from the improper
installation of your dishwasher cannot be covered
by the dishwasher warranty.
Mr. or Ms. Installer:
Please read the installation guide before you begin.
Thank you,
Your Dishwasher!
ii
301HT – Manual

301HT – Table of Contents
iii
Revisions to this manual _________________________________________________ i
Limited Warranty ______________________________________________________ iv
301HT: High temperature Undercounter Dishwasher
Installation Guide______________________________________________________ 1
˛ Unpack and Place _________________________________________________ 2
˛ Electrical Connection_______________________________________________ 3
˛ Plumbing Connections______________________________________________ 4
˛ Chemical Dispensers ______________________________________________ 5
˛ Initial Start-up ____________________________________________________ 6
How to Operate your dishwasher _________________________________________ 8
How to Maintain your dishwasher _________________________________________ 9
How to Clean your dishwasher __________________________________________ 10
The Troubleshooter ___________________________________________________ 13
Service Replacement Parts_____________________________________________ 15
Appendix A: (Specification Sheets)
Electrical Schematics _________________________________________________ 41
Service Agents
Table of Contents

iv
301HT – Limited Warranty
Moyer Diebel Limited, 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 Limited 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 dispensing 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 WARRANTY IS ONLY TO THE EXTENT
REFLECTED ABOVE. MOYER DIEBEL MAKES NO OTHER WARRANTIES, EXPRESS OR IMPLIED, INCLUDING, BUT NOT LIMITED
TO, ANY WARRANTY OF MERCHANTABILITY, OR FITNESS OF PURPOSE. CHAMPION/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 CHAMPION/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.
Limited Warranty

301HT – Installation Guide
1
1. Check the corrugated box that protected the dishwasher during shipment for punched holes
or impact marks.
2. Inspect the shipping pallet for splintered or broken boards.
3. Inspect the exterior of the dishwasher while still mounted on the pallet for signs of damage.
4. Contact the freight company immediately if damage is found and save all packing
for inspection to verify your damage claim.
5. Report the damage to your equipment supplier. They will contact our factory for repair or
replacement of damaged components.
6. If no damage is found, proceed with lifting the dishwasher from its pallet.
Be careful to lift the dishwasher by the main frame if using a forklift.
7. Make sure the four legs are screwed firmly in place after landing the machine.
8. Check the packing list to ensure all accessories are with the dishwasher.
9. Open the doors and remove the dishracks inside the machine and locate the postpaid
warranty cards inside the book.
10. Complete the warranty card and drop in the mail immediately.
11. Move the dishwasher close to its permanent location.
12. Locate the Quick Check Installation Card glued on the front door of the dishwasher.
The card has a check list to familiarize the installer with the dishwasher installation
procedures detailed in this manual.
13. Remove the protective covering from the dishwasher and identify the utility connections.
Information cards and stickers must not be removed from the dishwasher until the
installation is complete.
Installation Guide
˛ Unpack and Place (301HT)

2
301HT – Installation Guide
Caution: 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.
Installation Guide
˛ Unpack and Place (301HT)
Note:
Installers must follow applicable sanitation, safety, plumbing, and electrical codes and
regulations; and work in accordance with best practices for dishwasher installation.
Note:
Installation must allow for the ability to remove machine for servicing.

301HT – Installation Guide
3
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 main 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.
IMPORTANT: 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 3-wire 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.
Note:
Leave enough electrical cable behind the machine so that the dishwasher
can be pulled forward a minimum of two feet to be serviced.
Installation Guide
˛ Electrical Connections (301HT)
The MACHINE ELECTRICAL CONNECTION DATA PLATE is the certified
authority for the dishwasher power requirements. DO NOT use electrical
data from any other source unless an authorized factory representative
instructs you to use other data.

4
301HT – Installation Guide
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 20-22 PSI/138-151kPa.
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 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.
Installation Guide
˛ Plumbing Connections (301HT)
Note:
Plumbing connections must comply with local health and plumbing codes.

301HT – Installation Guide
5
Installation Guide
˛ Chemical Dispensers (301HT)
Detergent
The machine is equipped with an automatic detergent dispensing pump system.
1. Use a qualified detergent/chemical supplier for your detergent.
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.
Always wash hands under running water if they come into contact with the detergent and comply
with the instructions pertaining to the specific type of detergent.
To prime the peristaltic pump:
1. Insert pick-up tube into the detergent container.
2. Close machine door and switch machine on.
3. Push and hold the prime switch.
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. Push and hold the prime switch
Completing the Installation
1. Remove any foreign materials from inside the machine.
2. Install the scrap screens, wash and rinse arms, strainer basket and overflow tube.
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 2 inches above the scrap screen.
5. Close the door fully.
Warning:
Chemical dispensers must be electrically grounded in compliance with
applicable electric codes.
Caution:
Connecting chemical dispensers at points other than those recommended by the factory
may damage the dishwasher electrical system. Damage caused by the installation of
chemical equipment will not be covered by our WARRANTY.

6
301HT – Installation Guide
Installation Guide
˛ Initial Start Up (301HT)
1. The built-in stainless steel electric booster
was shipped without water.
2. A manilla card located above the power switch explains how to
turn the machine on for the first time.
Let's begin the Initial Start-up:
1. Check the placement of the dishwasher:
˛ Compare the machine location with the
building plan or consult the owner or
the General Contractor for approval.
2. Check that all options and/or accessories
are installed.
3. Remove protective white wrapping, tape,
and other packing materials and discard.
4. Remove any foreign materials
from the interior of the machine.

301HT – Installation Guide
7
Installation Guide
˛ Initial Start Up (301HT)
The following is a summary of your model 301HT dishwasher operating cycle:
1. The door must be closed to begin the cycle.
2. Press the POWER button to fill the wash tank.
3. The booster heater comes on when the correct water level has been reached.
4. Press and hold the START button to start the cycle. NOTE : After pushing the start button
the first cycle of each day could take at least 15-20 minutes if the machine was not allowed
to warm up first.
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 indicating that the cycle is
complete. DO NOT open the door until the cycle light turns off.
8. Open the door and remove the rack of clean ware.

8
301HT – Operation
Operation
˛ How to Operate Your Dishwasher (301HT)
Operation Procedures
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 150°F/66°C.
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 of wares 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 light illuminates.
Note: The machine may be stopped at any time during the cycle by opening the door. Closing
the door resumes the cycle where it was stopped.

301HT – Operation
9
Maintenance
1. Check the rinse temperature during the final rinse. The final rinse must be
180°F/82°C minimum.
2. When the green cycle light turns off, the cycle is complete.
3. Open the door and remove the rack.
4. Repeat steps 4-9 for additional cycles. Machine operation is automatic.
5. Clean the scrap screens after every meal period. During heavy usage the scrap screens
should be cleaned more frequently.
6. At the end of the day, any water in the tank should be drained by pressing the POWER
button to turn machine off and removing the overflow tube. Press and hold the DRAIN
switch to activate the drain pump and completely drain the machine.
Operation
˛ How to Maintain Your Dishwasher (301HT)

10
301HT – Operation
Cleaning Schedule
Meal Periods
1. Press power switch OFF
2. Remove the overflow tube and press and hold the DRAIN switch to drain the machine.
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.
Daily Maintenance
1. Keep your dishwasher and the surrounding area spotlessly clean.
2. Immediately report loose, broken or missing parts to your supervisor.
3. Check drains for flow restrictions.
4. Check the dishwasher for leaks.
5. Operate the dishwasher as explained in this manual.
Operation
˛ How to Clean Your Dishwasher (301HT)

301HT – Operation
11
Operation
˛ How to Clean Your Dishwasher (301HT)
Monthly Maintenance
1. Inspect pump hoses, door linkage, springs, and exterior of dishwasher for wear.
2. Inspect the wash arm bearings and O’s.
3. Check the condition of scrap screens, and dishracks for bent or broken pieces.
4. Check the toggle switches and indicator lights for damage.
5. Check the wash pump motor for loud bearings and leaking pump seal.
6. Create a simple Maintenance Tracking System as a guide for service.
Annual Maintenance
Call your authorized service agent or local service representative and schedule
a complete inspection of your dishwasher by a trained professional.
A Maintenance Tip -
Schedule your annual maintenance when you can
give the service agent unrestricted access to the
dishwasher for at least 2 to 2-1/2 hours.
Thoroughly cleaning your
dishwasher every day is the very
best maintenance you can do!!

12
301HT – Operation
Deliming
1. Add the delime chemical to the wash tank (per the chemical supplier specifications).
2. Close the door.
3. Press the POWER switch to fill the machine, then press the START switch to run through a
complete cycle.
4. When cycle is complete press the POWER switch to the OFF position, open the door and
remove the overflow tube to drain the tank, then press and hold the DRAIN switch to
drain the machine.
5. Replace overflow tube. Close door.
6. Repeat steps 3 - 5 to ensure all delime chemicals are purged from machine.
7. Deliming is now complete.
Operation
˛ How to Clean Your Dishwasher (301HT)