Moyerdiebel 201HTN Manual

InstallationManual withService ReplacementParts
Issue Date: 10.13.06
Manual P/N 0512240 rev.A
For machines beginning with S/N W11948 and above
Dishwasher serial no.
www.moyerdiebellimited.com
Undercounter
Dishwashers
(with pumped final rinse)
Models:
201HT High temperature w/booster
201HTN High temperature w/o booster
201LT Low temperature chemical sanitizing
401HT High temperature w/booster
401HTN High temperature w/o booster
501HT High temperature w/booster
501HTN High temperature w/o booster
501LT Low temperature chemical sanitizing
501HT
Printed in USA
201HT
401HT
2674 N. Service Road, Jordan Station
Ontario, Canada L0R 1S0
905/562-4195 Fax: [phone]
Toll-free: 800.263.5798
P.O. Box 4149
Winston-Salem, NC 27115
336/661-1556 Fax: [phone]
Toll-free: 800.858.4477

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__________________
Service 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
Toll-free: 800/ 263-5798
Tel: [phone]
Fax: [phone]
email: [e-mail]
Model 501 dishwasher data plate
is located on the left front corner
of the front access panel.
All other model data plates are
located on the lower right corner
Toll-free: 800/ 858-4477
Tel: [phone]
Fax: [phone]
email: [email protected]
National Service Department -USA
National Service Department - Canada

i
Revision Revised Serial Number Revision
Date Pages Effectivity Description
09.15.06 All w11948 Released first edition
Revisions to this manual
 ____________________ Revisions to this manual
This is where we record changes to the manual. Arevision might be a part number
change, new instructions, or information that was not available at print time.
We reserve the right to make changes to this manual without notice and without
incurring any liability by making the changes..
Dishwasher owners may request a revised manual, at no charge, by calling
(1-800) 263-5798 in Canada.

ii
Model Descriptions ___________
201-HT, 401-HT, and 501-HT Models
Pumped final rinse high temperature sanitizing dishwasher
with built-in 40°F rise stainless steel electric booster.
201-HTN, 401-HTN, and 501-HTN Models
Pumped final rinse high temperature sanitizing dishwasher
without built-in 40°F rise stainless steel electric booster.
201-LT, 501-LT Model
Pumped final rinse low temperature chemical sanitizing dishwasher
with 3 built-in chemical dispensing pumps.
Optional Equipment
70°F rise built-in stainless steel electric booster
Three Phase Connection (501-HT only)
1-RDT rack stand
17" dishwasher stand
Model Descriptions
NOTE:
The customer is responsible for supplying the proper incoming
water temperature to the dishwasher.
The temperature must be measured at the dishwasher

iii
Undercounter Dishwashers
Series: 201, 401, and 501
Revisions to this manual_______________________________________________i
Limited Warranty __________________________________________________ iv
Installation Guide ________________________________________
Unpack and Place
Electrical Connection
Water Connection
Drain Connection
Chemical Dispensers
Initial Start-up ____________________________________________
Operation _______________________________________________
How to Operate your Dishwasher
How to Clean your Dishwasher
How to Maintain your Dishwasher
Troubleshooting _________________________________________
Service Replacement Parts _______________________________
Electrical Schematics ____________________________________
Timer Charts ____________________________________________
_____________ Table of Contents
Table of Contents

iv
Limited Warranty

1
Unpack and Place
___________________________ Installation Guide
Unpack and Place
Unpacking of Dishwasher
NOTE:
The installation of your dishwasher must be performed by qualified service personnel.
Problems due to improper installation are not covered by the Warranty.
1. Inspect the outside of the dishwasher carton for signs of damage.
2. Remove the shipping box and inspect the dishwasher for damage.
3. Immediately contact the freight company and your equipment dealer to
report the damage.
4. Save all packing materials.
CAUTION:
Be careful when lifting and moving the dishwasher to prevent damage to the machine.
5. Check your packing list and identify the accessories shipped with your
dishwasher. Immediately report missing items to your dealer.
6. Turn to the front of this manual and complete the warranty card. Mail the card
at once.
7. Move the dishwasher near its permanent location.
8. Locate the Quick Check Installation Guide located on the dishwasher. Use
the card and the manual installation guide to properly install the dishwasher.
Placement of Dishwasher
CAUTION:
Be careful when lifting and moving the dishwasher to prevent damage to the machine.
NOTE:
The installation of the dishwasher must comply with local health codes.
1. Compare the utility connections with the dishwasher’s utility connections.
Contact your supervisor if problems are found.

2
Installation Guide_________________
Unpack and Place
Placement of Dishwasher (continued)
2. Your dishwasher may be installed as a free-standing unit or under a counter-top.
3. Typical counter-top height is 34". Refer to the illustration below.
4. Counter-top installations must provide storage space for the dishwasher’s
chemical supply containers. Container height must not exceed 10" above the
floor.
5. Chemical supply containers must be placed as close as possible to the side of the
dishwasher.
6. Check that the floor is level at the permanent location.
7. The dishwasher has adjustable feet for leveling.
8. Level the dishwasher front to back and side to side with a 24" bubble level to
match the permanent location.
9. Your dishwasher is ready for the utility connections.
Unpack and Place
Countertop
Wall
3" Minimum Wall
Clearance
34"
Minimum
Height
Floor
Chemical Supply
Containers

3
Electrical Connection
Front Panel Screw Location
______________ Installation Guide
Electrical Connection
NOTE:The electrical connection must be performed by a qualified electrician in accordance
with local codes and the National Electrical Code.
WARNING:
For models 201HT, 401HT, 501HT disconnect the incoming supply at the main
disconnect switch. Lockout and tag the switch to indicate that work
is being done on the circuit.
1. Refer to the connection diagrams below for proper dishwasher power connection at
the dishwasher main terminal block (MTB).
2. The single phase electrical supply must be a
3-wire plus ground circuit which includes
a current carrying neutral.
3. The 3-phase power connection is a 4-wire
plus ground which includes
a current carrying neutral.
4. The dishwasher MTB is located at the
front right-side of dishwasher. dishwasher’s
lower front access panel by removing the
two truss head screws.

4
Installation Guide ______________
Electrical Connection
5. Carefully bump the lower front access panel up as you pull forward.
6. Remove the main terminal block cover. The machine’s electrical schematic is located on the
inside of the front panel. Check the min/max data on the schematic.
7. Loosen the two screws securing the MTB. Then, pull the MTB up and forward.
8. Connect a flexible power cord conduit to the MTB.
The power cord must extend a minimum of 3 ft.
out the back of the dishwasher so the machine
can be pulled out for servicing.
9. Re-install the MTB and the lower
front access panel.
NOTE:
Models 201HTN, 401HTN, 501HTN, 501LT
and 201LT are equipped with a 4 foot
power cord and plug suitable for
120VAC-15A service.
Unpack and Place
Main Terminal Block (MTB)

5
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6
Water Connection
Installation Guide
Water Connection
Water Connection – All Models
NOTE:
Plumbing connections must comply with local plumbing and sanitary
codes.
NOTE:
Route the flexible fill hose in a manner that prevents kinks.
1. All models have a 6 ft. flexible hot water fill hose with a 3/4" female garden
hose connector.
2. A 1/2" or larger shut off valve should be installed upstream from the
dishwasher.
3. All models have a built-in flow control. The incoming hot water supply must
supply no less than 25-95psi flowing pressure.
4. The hot water supply must provide a minimum of 140°F, measured at the
dishwasher for the 40°F rise booster. For the 70°F rise booster the hot water
supply must provide a minimum of 110°F measured at the dishwasher.
5. The incoming hot water supply line must be a 1/2" or larger supply line.
A 3/4" is recomended.

7
Drain Connection
Installation Guide
Drain Connection
Drain Connection
1. All models have a 6 ft., 5/8" I.D. drain hose. Maximum drain hose height is 3 ft. with
a recommended height of 17" above the floor.
2. The drain hose is located on the right rear of the machine. A 5/8" hose barb -
3/4" NPT adapter fitting is strapped to the end of the drain hose for the drain
connection.
3. The maximum drain flow is 15 gpm.
NOTE:
The dishwasher drains in 8 seconds and drain water exits the hose with
considerable force.
CAUTION:
Do not connect the drain hose to a disposer. The dishwasher will not drain
correctly.
4. The drain hose is clamped to the rear of the machine to provide a goose neck
bend. DO NOT remove this clamp.
5. Connect the drain hose to a wye fitting installed in the house drain.
DO NOT connect to a tee fitting.
6. Do not kink the drain hose.

8
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9
Initial Start-Up
Installation Guide
Initial Start-Up
Initial Start-Up All Models
1. Remove any protective film from
dishwasher. Check the interior for foreign material.
2. Confirm that all utility connections are complete and that the dishwasher is
in its permanent location.
3. Inspect the flexible drain hose and hot water fill hose to ensure they are not kinked.
4. Check the chemical supply containers to ensure they are full.
5. Check the spray arms are in place and that they spin freely.
6. Fully close the dishwasher door.
7. Turn hot water supply on and check for leaks.
Install Scrap Screen

10
Initial Start-Up
Installation Guide
Initial Start-Up
Models: 201HT, 401HT, 501HT only
ATTENTION:
The Dishwasher’s built-in booster heater was drained prior to shipment.
The booster must be filled before operating the dishwasher.
Booster Service Switch
The booster is filled with the booster service switch.
It is located behind the lower front access panel on the left center of the machine.
To Fill the Booster:
1. Remove the lower front access panel.
2. Locate the booster service switch and note the 3 switch positions indicated
on the switch label.
3. Turn the main power supply on. Verify correct voltage at MTB.
4. Press and hold the booster service switch down to fill the booster.
5. Continue to hold the switch down until you hear the water flowing
inside the dishwasher.
6. Release the switch, then flip the switch up to the ON position.
The dishwasher is ready for operation.
Booster Service Switch Push and Hold to Fill

11
Initial Start-Up
Installation Guide
Initial Start-Up
Booster Service Switch (continued)
7. Flip the dishwasher POWER switch up to the “ I “ position. The POWER switch illuminates
and the machine fills with water.
8. Press and hold the green START SWITCH for 1-second.
9. Release the START switch. The dishwasher starts and the green cycle light illuminates.
10. Check the temperature gage to confirm that it displays the correct incoming hot water
temperature.
11. When the dishwasher stops, flip the POWER switch down to the“O” position.
The green cycle light illuminates as the dishwasher begins the drain cycle.
12. The green cycle light goes out when the machine has drained completely.
13. The initial start-up is complete.
Flip Power Switch
Proper Water Fill Line Check Wash Water Temperature Gauge

12
Chemical Dispensers
Installation Guide
Chemical Dispensers
1. All models come equipped with a built-in detergent dispensing pump and a rinse-aid
dispensing pump.The pumps are located behind the lower front access panel.
2. Each pump is fitted with 6 ft. of pick-up supply tubing, a stand-pipe, and a strainer.
3. Pick-up tubes are marked detergent and rinse-aid.
Make sure the pick-up tubes are placed in the correct chemical supply
container (chemicals supplied by others).
4. The chemical dispensers require non- chlorinated liquid detergent and rinse- aid. Your
chemical supplier must adjust the dispensers for the supplied product.
5. Chemical containers must be placed as close to the dishwasher as possible
and no higher than 10" above the floor
Chemical Dispensing Pumps Chemical Pick-up Tubes

13
Electrical Connection
Chemical Dispensers
Installation Guide
Chemical Dispensers
How to Prime the Dispensers
1. Place the chemical containers next the dishwasher.
2. Insert the detergent and rinse-aid pick-up tubes in the correct chemical supply container.
3. Open the dishwasher door.
4. Press and hold the PRIME switch up to prime the detergent.
5. Watch the detergent injection point located on the right side wall of the machine until
chemical enters the machine.
6. Press and hold the prime switch down for 30 seconds to prime the rinse-aid.
Chemical Injection Point

14
Chemical Dispensers
Installation Guide
Chemical Dispensers
To Chemical Suppliers
How to Adjust Chemical Dispensers:
1. The chemical dispensing pumps are adjustable.
2. Adjustments are made by turning the trim potentiometers located on the dishwasher
control board located at the lower right corner of the machine.
3. Remove the lower front access panel and identify the control circuit board cover.
Trim Potentiometers
Each dispensing trim potentiometer is labeled on the cover.
4. Insert a small screwdriver into an access hole.
5. Turn the trim potentiometer clockwise to increase
the amount of dispensed chemical;
or counter-clockwise to
reduce the dispensed chemical.
NOTE:
The water level may be changed by adjusting
the fill trim potentiometer on the circuit board.
Trim Potentiometers