Moyer Diebel MH-60M4, MH-6NM4, MH-6LM4 Service Manual

Simply Engineered Better

For machines beginning with
serial no. D2144 thru D3693

Technical Manual

Door-Type
Dishwasher

Model

MH-60M4
High Temperature
with Built-in Booster

MH-6NM4
High Temperature

MH-6LM4
Low Temperature

February, 2003

P. O. Box 4183
Winston-Salem, North Carolina 27115-4183
336/661-1992 Fax: [phone]

Machine Serial No.

Manual P/N 113139 Rev. C

2674 N. Service Road
Jordan Station, Ontario, Canada L0R 1S0
905/562-4195 Fax: [phone]

Moyer Diebel

Complete the information below so it will be available for quick reference.

Model Number Serial Number

Voltage and Phase

Moyer Diebel Parts Distributor Phone
(if applicable)

Moyer Diebel Service Agency Phone

Moyer Diebel Service:

Moyer Diebel, US

Phone: [phone]

1(800) 228-8350

Fax: [phone]

Moyer Diebel, Limited

Phone: [phone]

1(800) 263-5798

Fax: [phone]

Note: When calling to order parts, be sure to have the model number, serial number,
voltage and phase of your machine, along with your customer account number.

Machine Data Plate with
Model & Serial Number
located on the front panel.

Machine

COPYRIGHT © 2003 by Moyer Diebel

REVISIONS

Revision History

Revision Revised Serial Number Comments

Date Pages Effectivity

04/01/01 All D2144 Issue of New Service Manual and

replacement parts lists

08/07/01 63 — Changed P/N 112483 to 112484

01/03/02 53, 57 D3291 Change vacuum breaker 3/4"

PN 104429 to 113222

01/03/02 38, 39 Added straight track assembly

12/18/02 63 D3857 Inserted timer control board kit

P/N 900911 to replace 112676.

2/5/03 43 D3857 Replaced 112164 with 113514 bearings.

2/5/03 47, 61 — Replaced 108391 with 113622 thermometer.

2/5/03 59 — Replaced impeller with new number.

2/5/03 63 — Replaced Furnace (Siemens) overloads

withTelemecanique (Square D) overloads.

i

CONTENTS

LIMITED WARRANTY ............................................................................................................... v

INTRODUCTION ......................................................................................................................... 1

INSTALLATION........................................................................................................................... 8

INITIAL START-UP ..................................................................................................................... 16

OPERATION SUMMARY ........................................................................................................... 22

CLEANING ................................................................................................................................... 23

TROUBLESHOOTING ................................................................................................................ 25

BASIC SERVICE .......................................................................................................................... 27

REPLACEMENT PARTS ............................................................................................................. 33

CONTENTS

Model Number ....................................................................................................................6

Standard Equipment ........................................................................................................... 6

Options................................................................................................................................ 6

Electrical Power Requirements .......................................................................................... 7

Unpack the Dishwasher ...................................................................................................... 8

To Change from Straight-through Operation to Corner Operation .................................... 9

Electrical Connections ........................................................................................................ 10

Plumbing Connections ........................................................................................................ 12

Water Connections ......................................................................................................... 12

Drain Connections .......................................................................................................... 13

Chemical Connections.................................................................................................... 14

Cleaning Schedule .............................................................................................................. 23

Deliming Process ................................................................................................................24

ELECTRICAL SCHEMATICS ..................................................................................................... 69

LIST OF FIGURES

Figure 1 – Remove Front Panel ................................................................................................ 8

Figure 2 – Electrical Connection Location ............................................................................... 10

Figure 3 – Hinged Control Panel .............................................................................................. 11

Figure 4 – Main Terminal Block .............................................................................................. 11

Figure 5 – Hot Water Connection (MH-60 Only) ..................................................................... 12

Figure 6 – Hot Water Connection (MH-6N, MH-6L Only)...................................................... 12

Figure 7 – Drain Hose Connection ........................................................................................... 13

Figure 8 – Chemical Dispenser Signal Terminal Block ........................................................... 14

Figure 9 – Chemical Signal Connection Points ........................................................................ 14

Figure 10 – Detergent Probe Injection Points, 1/2" .................................................................... 15

ii

CONTENTS

LIST OF FIGURES (cont.)

Figure 11 – Rinse Aid and Sanitizer Injection Points .............................................................. 15

Figure 12 – Fuses ..................................................................................................................... 28

Figure 13 – Motor Overload .................................................................................................... 28

Figure 14 – Solid State Control Board ..................................................................................... 29

Figure 15 – Float Switch .......................................................................................................... 29

Figure 16 – float Switch Troubleshooting Chart...................................................................... 29

Figure 17 – Heater Element Wiring ......................................................................................... 30

Figure 18 – Pump Motor Wiring Diagrams ............................................................................. 31

Figure 19 – Pump Seal Replacement ....................................................................................... 32

Figure 20 – Doors and Panels .................................................................................................. 34

Figure 21 – Door Guides, Stops and Lift Bracket.................................................................... 36

Figure 22 – Door Handle, Spring Assembly and Safety Switch .............................................. 38

Figure 23A– Straight Track Assembly....................................................................................... 40

Figure 23B – Corner Track Assembly ........................................................................................ 40

Figure 24 – Wash/Rinse Spray Piping ..................................................................................... 42

Figure 25 – Wash/Rinse Spray Arms ....................................................................................... 44

Figure 26 – Drain Assembly and Scrap Screens ...................................................................... 46

Figure 27 – Wash Tank Heat and Thermostats......................................................................... 48

Figure 28 – Electric Booster and Thermostats (MH-60 Only) ................................................ 50

Figure 29 – Lower Fill Piping Assembly (MH-60 Only)......................................................... 52

Figure 30 – Upper Fill Piping Assembly (MH-60/6N Only) ................................................... 54

Figure 31 – Lower Fill Piping Assembly (MH-6N/6L Only) .................................................. 56

Figure 32 – Upper Fill Piping Assembly (MH-6L Only) ......................................................... 58

Figure 33 – Pump Assembly .................................................................................................... 60

Figure 34 – Control Panel and Gauges .................................................................................... 62

Figure 35 – Control Cabinet..................................................................................................... 64

Figure 36 – Dishracks and PRV ............................................................................................... 66

APPENDIXES

Appendix A – Straight-through to Corner (Door conversion kit) ................................................ 68

Appendix B – Corner to Straight-through (Door conversion kit) ................................................ 70

ELECTRICAL SCHEMATICS

B701602/D – Wiring Diagrams (MH-60, MH-6N, MH-6L Steam/Electric 1 & 3 Phase) ............ 72

iii

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INTENTIONALLY

LEFT BLANK

iv

WARRANTY

LIMITED WARRANTY

Champion Industries/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: Champion Industries/Moyer Diebel Limited warrants all new machines of its manufacture bearing

the name “Champion” or "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 Champion/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 Champion/Moyer Diebel within ten (10) days after installation.
If warranty card is not returned to Champion/Moyer Diebel within such period, the warranty will expire after one year from
the date of shipment.

Champion/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, Champion/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, Champion/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 Champion/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 Champion/Moyer Diebel authorized service technician. Defective parts become the property of
Champion/Moyer Diebel. Use of replacement parts not authorized by Champion/Moyer Diebel will relieve Champion/
Moyer Diebel of all further liability in connection with its warranty. In no event will Champion/Moyer Diebel's warranty
obligation exceed Champion/Moyer Diebel's charge for the machine. The following are not covered by Champion/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: Champion/Moyer Diebel warrants all new machine parts produced or authorized by Champion/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 Champion/Moyer Diebel will replace the defective
part without charge.

DISCLAIMER OF WARRANTIES AND LIMITATIONS OF LIABILITY. CHAMPION/MOYER DIEBEL'S
WARRANTY IS ONLY TO THE EXTENT REFLECTED ABOVE. CHAMPION/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 DIEBELDISHWASHING MA­CHINES AND CHAMPION/MOYER DIEBEL PARTS, AND ALL OTHER REMEDIES ARE EXCLUDED, INCLUD­ING ANY LIABILITY FOR INCIDENTALS OR CONSEQUENTIAL DAMAGES.

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

rev. 8699

v

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INTENTIONALLY

LEFT BLANK

vi

INTRODUCTION

INTRODUCTION

Welcome to Moyer Diebel...and thank you for allowing us to take care of your dishwashing
needs.

This manual covers the door-type dishwasher, Models MH-60, MH-6N, MH-6L.
Your machine was completely assembled, inspected, and thoroughly tested at our factory before it
was shipped to your installation site.

This manual contains:

• Installation Instructions

• Operation and Cleaning Instructions

•Troubleshooting Guide

• Basic Service Information

• Replacement Parts Lists

• Electrical Schematics

All information, illustrations and specifications contained in this manual are based upon
the latest product information available at the time of publication. Moyer Diebel constantly
improves its products and reserves the right to make changes at any time or to change
specifications or design without notice and without incurring any obligation.

For your protection, factory authorized parts should always be used for repairs.

Replacement parts may be ordered directly from your Moyer Diebel authorized parts distributor
or authorized service agency. When ordering parts, please supply the model number, serial
number, voltage, and phase of your machine, the part number, part descriptions and quantity.

1

GENERAL

MODEL NUMBERS

MH-60, MH-6N, MH-6L

The MH-60 model is a high temperature
(180°F/82°C rinse) sanitizing model with
booster.

The MH-6N model is a high temperature
(180°F/82°C rinse) sanitizing model without
booster.

The MH-6L is a low temperature (Min. 120°F/
49°C-140°F/60°C Optimum) sanitizing model
for use with a sodium hypochlorite (Chlorine)
based sanitizer at a minimum concentration of
50 PPM in the final rinse.

Standard Equipment includes:

MH-60, MH-6N, MH-6L

• Automatic tank fill and start

• Built-in electric booster heater (MH-60 only)

• Field convertible to corner model with kit

• Electric tank heat

• Balanced three door lift system

• Low-water tank heat protection

• 1-hp drip-proof pump motor

• Door safety switch

Options (MH-60 only)

• Electric booster (70°F/39°C temperature
rise) heater for 110°F/43°C supply water

• Steam injector or steam coil tank heat
(steam booster 40°F/23°C-70°F/39°C rise)

Accessories

Additional dishracks:
Dish rack (peg) P/N 101285
Silverware rack (flat bottom) P/N 101273

3/4" Pressure reducing valve (PRV) P/N 112387

• Common utility connections

•Two dish racks (peg and flat bottom)

• Detergent/chemical connection provisions

• Stainless steel front and side panels

• 60-second time cycle

• 1-1/2" O.D. gravity drain connection

•Water pressure reducing valve (MH-60 only)

• Interchangeable upper and lower spray arms

2

GENERAL

Electrical Power Requirements: Fig Electric Heat/Electric Booster

Model Voltage Booster Rise Rated Minimum Supply Ckt. Maximum Overcurrent

(MH-60 Only) Amps Conductor Ampacity Protective Device

MH-6N/MH-6L 115/60/1 — 48 Amps 60 Amps 60 Amps
MH-6N/MH-6L 208/60/1 — 25 Amps 35 Amps 35 Amps
MH-6N/MH-6L 220/60/1 — 25 Amps 35 Amps 35 Amps
MH-6N/MH-6L 230/60/1 — 26 Amps 35 Amps 35 Amps
MH-6N/MH-6L 240/60/1 — 26 Amps 35 Amps 35 Amps
MH-6N/MH-6L 208/60/3 — 13 Amps 20 Amps 20 Amps
MH-6N/MH-6L 220/60/3 — 14 Amps 20 Amps 20 Amps
MH-6N/MH-6L 230/60/3 — 14 Amps 20 Amps 20 Amps
MH-6N/MH-6L 240/60/3 — 15 Amps 20 Amps 20 Amps
MH-6N/MH-6L 380/60/3 — 8 Amps 15 Amps 15 Amps
MH-6N/MH-6L 415/60/3 — 9 Amps 15 Amps 15 Amps
MH-6N/MH-6L 480/60/3 — 7 Amps 15 Amps 15 Amps
MH-6N/MH-6L 575/60/3 — 6 Amps 15 Amps 15 Amps

MH-60 115/60/1 — — — —
MH-60 208/60/1 40°F/23°C 69 Amps 80 Amps 80 Amps
MH-60 220/60/1 40°F/23°C 69 Amps 80 Amps 80 Amps
MH-60 230/60/1 40°F/23°C 76 Amps 90 Amps 90 Amps
MH-60 240/60/1 40°F/23°C 76 Amps 90 Amps 90 Amps
MH-60 208/60/3 40°F/23°C 39 Amps 45 Amps 45 Amps
MH-60 220/60/3 40°F/23°C 39 Amps 45 Amps 45 Amps
MH-60 230/60/3 40°F/23°C 43 Amps 40 Amps 40 Amps
MH-60 240/60/3 40°F/23°C 43 Amps 40 Amps 40 Amps
MH-60 380/60/3 40°F/23°C 24 Amps 30 Amps 30 Amps
MH-60 415/60/3 40°F/23°C 25 Amps 30 Amps 30 Amps
MH-60 480/60/3 40°F/23°C 18 Amps 25 Amps 25 Amps
MH-60 575/60/3 40°F/23°C 15 Amps 20 Amps 20 Amps

MH-60 115/60/1 — — — —
MH-60 208/60/1 — — — —
MH-60 220/60/1 — — — —
MH-60 230/60/1 — — — —
MH-60 240/60/1 — — — —
MH-60 208/60/3 70°F/39°C 50 Amps 70 Amps 70 Amps
MH-60 220/60/3 70°F/39°C 50 Amps 70 Amps 70 Amps
MH-60 230/60/3 70°F/39°C 58 Amps 80 Amps 80 Amps
MH-60 240/60/3 70°F/39°C 58 Amps 80 Amps 80 Amps
MH-60 380/60/3 70°F/39°C 31 Amps 40 Amps 40 Amps
MH-60 415/60/3 70°F/39°C 33 Amps 45 Amps 45 Amps
MH-60 480/60/3 70°F/39°C 28 Amps 35 Amps 35 Amps
MH-60 575/60/3 70°F/39°C 23 Amps 30 Amps 30 Amps

Electrical Power Requirements:Fig Steam or Gas Heat/Steam or Gas Booster

Model Voltage Booster Rise Rated Minimum Supply Ckt. Maximum Overcurrent

MH-6N/MH-6L 115/60/1 — 22 Amps 30 Amps 30 Amps
MH-6N/MH-6L 208/60/1 — 22 Amps 15 Amps 15 Amps
MH-6N/MH-6L 220/60/1 — 13 Amps 15 Amps 15 Amps
MH-6N/MH-6L 230/60/1 — 13 Amps 15 Amps 15 Amps
MH-6N/MH-6L 240/60/1 — 11 Amps 15 Amps 15 Amps
MH-6N/MH-6L 208/60/3 — 6 Amps 15 Amps 15 Amps
MH-6N/MH-6L 220/60/3 — 6 Amps 15 Amps 15 Amps
MH-6N/MH-6L 230/60/3 — 6 Amps 15 Amps 15 Amps
MH-6N/MH-6L 240/60/3 — 6 Amps 15 Amps 15 Amps
MH-6N/MH-6L 380/60/3 — 4 Amps 15 Amps 15 Amps
MH-6N/MH-6L 415/60/3 — 4 Amps 15 Amps 15 Amps
MH-6N/MH-6L 480/60/3 — 3 Amps 15 Amps 15 Amps
MH-6N/MH-6L 575/60/3 — 3 Amps 15 Amps 15 Amps

MH-60 115/60/1 — — — —
MH-60 208/60/1 40°F/23°C 22 Amps 30 Amps 30 Amps
MH-60 220/60/1 40°F/23°C 22 Amps 15 Amps 15 Amps
MH-60 230/60/1 40°F/23°C 13 Amps 15 Amps 15 Amps
MH-60 240/60/1 40°F/23°C 13 Amps 15 Amps 15 Amps
MH-60 208/60/3 40°F/23°C6 Amps 15 Amps 15 Amps
MH-60 220/60/3 40°F/23°C6 Amps 15 Amps 15 Amps
MH-60 230/60/3 40°F/23°C6 Amps 15 Amps 15 Amps
MH-60 240/60/3 40°F/23°C6 Amps 15 Amps 15 Amps
MH-60 380/60/3 40°F/23°C4 Amps 15 Amps 15 Amps
MH-60 415/60/3 40°F/23°C4 Amps 15 Amps 15 Amps
MH-60 480/60/3 40°F/23°C3 Amps 15 Amps 15 Amps
MH-60 575/60/3 40°F/23°C3 Amps 15 Amps 15 Amps

MH-60 115/60/1 — — — —
MH-60 208/60/1 — — — —
MH-60 220/60/1 — — — —
MH-60 230/60/1 — — — —
MH-60 240/60/1 — — — —
MH-60 208/60/3 70°F/39°C6 Amps 15 Amps 15 Amps
MH-60 220/60/3 70°F/39°C6 Amps 15 Amps 15 Amps
MH-60 230/60/3 70°F/39°C6 Amps 15 Amps 15 Amps
MH-60 240/60/3 70°F/39°C6 Amps 15 Amps 15 Amps
MH-60 380/60/3 70°F/39°C4 Amps 15 Amps 15 Amps
MH-60 415/60/3 70°F/39°C4 Amps 15 Amps 15 Amps
MH-60 480/60/3 70°F/39°C3 Amps 15 Amps 15 Amps
MH-60 575/60/3 70°F/39°C3 Amps 15 Amps 15 Amps

(D-HBT Only) Amps Conductor Ampacity Protective Device

3

INSTALLATION

INSTALLATION

Unpack the dishwasher

CAUTION:

!

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

NOTE:

The installation of your machine must meet
all applicable health and safety codes.

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

2. Remove the dishwasher from the skid.
Move the machine to its permanent location.

NOTE:

Refer to: To change from Straight-through
Operation to Corner Operation on the next

POWER

FILL

CYCLE

EXTENDED

WASH

RINSE

WASH

WARNING!

TURN OFF POWER BEFORE

SERVICING MACHINE

page if your machine will be placed for
corner operation.

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

4. Remove the dishracks from the interior of
the machine.

5. Refer to Fig. 1. Remove (2) screws that hold
the front panel. Remove the front panel in
preparation for service connections.

Figure 1

Remove Front Panel

Changing Operation – Straight-through to Corner

Your door-type dishwasher was specified to the factory as a straight-through configuration or as a
corner configuration. Your machine can be converted from straight-through to corner or from
corner to straight-through. The factory has kits for these types of conversions. For instructions
and part numbers, see Appendixes A, B and C.

4

INSTALLATION (Cont.)

Electrical Connections

WARNING:

!

Electrical and grounding connections must
comply with all applicable Electrical
Codes.

WARNING:

!

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

1. A qualified electrician must compare the
electrical power supply with the machine
electrical specifications before connecting
to the incoming service through a fused
disconnect switch.

INSTALLATION

Electrical knock-out
lower rear corner

Refer to Fig. 2

2. A knock-out is provided at the lower right
rear corner (as viewed from the front) for
the electrical service connection. A fused
disconnect switch or circuit breaker
(supplied by others) is required to protect
the power supply circuit.

Figure 2

Electrical Connection Location

5

INSTALLATION

Electrical Connections (Cont.)

Refer to Fig. 3

3. Remove (2) lower screws from the front
panel of the machine to expose the electri­cal controls. Remove (2) screws on the
control panel support. Swing the hinged
control panel forward.

Figure 3

Hinged Control Panel

Refer to Fig. 4

4. Three phase or single phase incoming
power wiring connections are made at the
bottom of the machine’s main terminal
block. The main terminal block is located
on the side of the front right post of the
dishwasher.

Electrical Power Connection

Figure 4

Main Terminal Block

6

INSTALLATION (Cont.)

Plumbing Connections

NOTE:

Plumbing connections must comply with
all applicable sanitary and plumbing
codes.

INSTALLATION

Water Connections

1. All MH series dishwashers require a
single, hot water supply.

The hot water connection to all MH
series dishwashers is 3/4" NPT.

The connection is made from
underneath the dishwasher.

The following minimum water
temperatures are recommended:

MH-60 with built-in 40° rise electric
booster (Minimum 140°F/60°C)
(Min./Max. flow pressure
20-22 PSI/138-151.8 kPa)

MH-60 with built-in 70° rise electric
booster (Minimum 110°F/43°C)
(Min./Max. flow pressure
20-22 PSI/138-151.8 kPa)

MH-6N without built-in booster
(Minimum 180°F/70°C)
(Min./Max. flow pressure
20-22 PSI/138-151.8 kPa)

MH-6L low temperature
(Minimum 120°F/49°C-
140°F/60°C Optimum)
(Min./Max. flow pressure
20-22 PSI/138-151.8 kPa)

Refer to Figs. 5 and 6

12"

[305mm]

Figure 5

Hot Water Connection

(MH-60 Only)

3/4" NPT

12"

[305mm]

R

O

FLO

Figure 8

Hot Water Connection

(MH-6N, MH-6L Only)

3/4" NPT

FLO

OR

7

INSTALLATION

Water Connections (Cont.)

2. A manual shut-off valve for steam and water
(supplied by others) should be installed in
the supply line to allow for servicing of 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)
in the water supply line if flow pressure
exceeds 20-22 PSI/138-151.8 kPa.

A PRV is standard equipment on Model
MH-60. A PRV is not standard equipment on
Models MH-6N, MH-6L.

Drain Connections

Refer to Fig. 9

1. MH series models are GRAVITY DRAIN
machines equipped with a 1-1/2" O.D.
hose connection point.

2. The maximum drain flow rate is
15 gallons/min-56.8 liters/min.

3. Drain height for all models must not
exceed 11" (280mm) above floor level.

4. The drain connection is made to the
dishwasher from underneath the machine
through an access hole in the machine
base.

Ventilation

NOTE:

Ventilation must comply with local sanitary
and plumbing codes.

CAUTION:

!

Exhaust air should not be vented into a
wall, ceiling, or concealed space of a
building. Condensation can cause
damage.

11" [280mm]

Above floor level

Figure 7

Drain Hose Connection

1-1/2" O.D.

(Max flow rate = 15 gal/min-56.8 liters/min)

8

INSTALLATION (Cont.)

Chemical Connections

NOTE:

Consult a qualified chemical supplier
for your chemical needs.

Refer to Fig. 8

1. A chemical signal terminal block is
supplied for chemical dispensing
equipment.

2. The terminal block is located below
the control panel fuse block.

INSTALLATION

Refer to Fig. 9

3. The detergent signal is limited
to a maximum load of 1 Amp.
Signal voltage is 115VAC.

4. The Rinse aid/Sanitizer
signal is limited to a max­imum load of 1 Amp.
Signal voltage is 115VAC.

COMMON

Figure 8

Chemical Dispenser

Signal

Terminal Block

Detergent Signal Connection Point
1 Amp Max Load/115VAC

Common Return

RINSE

DETERGENT

Rinse aid/Sanitizer
Signal Connection Point
1 Amp Max load/115VAC

Figure 9

Chemical Signal

Connection Points

9

INSTALLATION

Chemical Connections (Cont.)

Refer to Fig. 10

5. A 1/2" detergent probe injection point is
provided at the rear and left side of the
dishwasher.

6. Detergent may be added manually if
your dishwasher is not equipped with
dispensing equipment. Consult your
chemical supplier for recommended
amounts.

Refer to Fig. 11

7.

MH-60, 6N, 6L

A 1/4" NPT rinse aid injection point is
provided in the final rinse manifold.

Use a liquid rinse aid.

Figure 10

Detergent Probe

Injection Points, 1/2"

MH-60, 6N

The manifold is located on the top right
side of the dishwasher.

MH-6L Only

8.
A 1/8" NPT sanitizer injection point is
provided in the final rinse manifold.

Models MH-60 and MH-6N do not
require sanitizer.

9. Use a sodium hypochlorite (Chlorine)
based sanitizer at a minimum concentra­tion of 50PPM in the final rinse.

10. Use chlorine test papers to verify and
monitor the 50PPM chlorine level.

WARNING:

!

Never premix rinse aid with the
sanitizing agent. Mixing may cause
hazardous gases to form.

CAUTION:

!

Some metals, including silver, aluminum
and pewter, are attacked by sodium
hypochlorinte (chlorine). Avoid cleaning
these metals in a MH-6L.

1/4" NPT rinse-aid
injection point
Model MH60, 6N, 6L

1/8" NPT sanitizer
injection point
Model MH6L Only

10

Figure 11

Rinse Aid and

Sanitizer Injection Points

(Top of Dishwasher)

INITIAL START-UP

Complete the installation

After plumbing and electrical connections are made, follow
the steps below to complete the installation of your dishwasher.

1. Remove the white protective covering from the
exterior of the machine.

2. Remove any foreign material from inside
the machine.

3. Make sure dishwasher power switch is off.

4. Turn main water supply on.

5. Turn main power on at the main power
service disconnect switch.

INITIAL START-UP

1

Install the Scrap Screens
and Drain-Overflow Assembly

Install scrap screens.
Make sure rubber stopper
is secure on the drain­overflow assembly.

Make sure the drain-overflow
seats securely in the
tank bottom.

MAKE SURE DOORS
ARE FULLY CLOSED.

2

The controls are located
on the front of the dishwasher.

A- On/Off power switch
B- Power indicator Light
C- In-cycle light
D- Extended wash switch
E- Wash water

temperature gauge

F- Final rinse

pressure gauge

A

E

POWER

OFF

WASH

B

C

EXTENDED

CYCLE

RINSE PRESSURE

WASH

D

F

11

INITIAL START-UP

INITIAL START-UP (CONT.)

3

THE POWER SWITCH IS
ON DURING INITIAL FILL.

Make sure the doors are fully closed.
Push the On/Off power
switch to the UP position.

THE DISHWASHER FILLS
AUTOMATICALLY.

NOTE:

The dishwasher will fill automatically each
time the power is turned off even if the
dishwasher is full of water.

4

Note that the power indicator
light is illuminated.

POWER

OFF

POWER

OFF

WASH

WASH

CYCLE

EXTENDED

CYCLE

RINSE PRESSURE

EXTENDED

RINSE PRESSURE

WASH

WASH

5

Check Wash
Water Temperature

The wash tank heater and
the (booster tank heater, MH-60 only)
will begin to heat the water in
the dishwasher.

Wait approximately 10 minutes
for the wash tank water to
reach operating temperature.
The temperature should be a minimum
of 150°F/66°C for (MH-60, MH-6N).
The MH-6L requires a minimum of
120°F/49°C. However, a minimum of
140°F/60°C is optimum for the MH-6L.

Prescrap the dishes. Load ware into
the dishrack. Open the doors, insert the
rack into the dishwasher.

POWER

OFF

WASH

EXTENDED

CYCLE

RINSE PRESSURE

WASH

12

INITIAL START-UP (CONT.)

6

Fully close the dishwasher doors.
The dishwasher will begin the
automatic cycle.

Opening the doors anytime
during the cycle will stop the
dishwasher.

Closing the doors will resume
the automatic cycle where it
left off.

The cycle times are listed below:

INITIAL START-UP

Wash = 45 seconds
Dwell = 1 second
Final rinse = 14 seconds

7

Note that the in-cycle light
is lit during the automatic
dishwasher cycle.

POWER

OFF

WASH

EXTENDED

CYCLE

RINSE PRESSURE

WASH

13

INITIAL START-UP

250

2
0

0

1

5

0

100

5

0

0

INITIAL START-UP (CONT.)

8

Check Final Rinse
Water Temperature

Check the final rinse water
temperature during the
final rinse cycle.

The final rinse water
temperature gauge is located
in the final rinse piping at
the top of the dishwasher.

The final rinse water tempera­ture should be a minimum of
180°F/82°C for (MH-60, MH-6N).
The optimum final rinse temperature
for (MH-60, MH-6N) is
180-195°F/82-91°C.

The MH-6L requires a minimum final
rinse temperature of 120°F/49°C.
However, a minimum final rinse temperature of
140°F/60°C is optimum for the MH-6L.

9

Check Final Rinse
Water Pressure

The final rinse water pressure gauge
should indicate a flowing pressure of
20-22 PSI/138-151.8 kPa during the
final rinse cycle for all models.

A pressure reducing valve (PRV) is
required if flow pressure exceeds
20-22 PSI/138-151.8 kPa.

POWER

OFF

WASH

EXTENDED

CYCLE

RINSE PRESSURE

WASH

14

INITIAL START-UP (CONT.)

INITIAL START-UP

10

The Extended Wash
Operation

The extended wash switch holds the
dishwasher in a continuous wash mode
for cleaning heavily soiled ware.

Open and then fully close the
dishwasher doors. The dish­washer will begin a wash
cycle automatically.

Push the Extended wash switch UP
to the extended wash position.

The dishwasher will remain in a continuous wash mode
until the switch is flipped down. The dishwasher will
resume the cycle and finish with a final rinse.

11

POWER

OFF

WASH

EXTENDED

CYCLE

RINSE PRESSURE

WASH

Complete the initial start-up

Check all the plumbing for leaks. Also, check the drain plumbing for leaks and be sure that the drain will
handle the drain water flow (15 gal/min-56.8 liters/min) from the dishwasher.

After the drain and the plumbing connections are checked, turn off the dishwasher power switch.

12

Drain the dishwasher

Make sure the dishwasher
power switch is turned off.
Drain the dishwasher by
pulling the handle of the
drain-overflow assem­bly straight up. Rotate the
handle 90° to lock the drain
in the up position.

15

INITIAL START-UP

INITIAL START-UP (Cont.)

13

Drain the dishwasher (Cont.)

Be sure the drain-overflow seal is secure
on the drain-overflow assembly.

14

Remove the scrap screens and
check the drain located in
the bottom of the dishwasher
wash tank.

Make sure that the building drain handles the
water flow exiting the dishwasher.

Clean the interior of the wash
tank of any foreign material.

Leave the doors open to air
dry the interior of the
dishwasher.

The initial start-up is complete.

16

OPERATION SUMMARY

Action Result

OPERATION

1. Push the On/Off power switch “UP” to

the ON position. Dishwasher fills
automatically.

2. Wait approximately 10 minutes for the

wash tank heater to heat the water. Then,
check the reading on the wash water
temperature gauge.

3. Prescrap and load the ware into the

dishrack.

4. Open the doors.

Insert a dishrack of soiled ware.
Fully close the doors.

Opening the doors anytime during the
automatic cycle stops the dishwasher.
Closing the doors will resume the cycle
where it left off.

5. Check the final rinse temperature gauge

reading during the 14 second final rinse
cycle.

1. The power indicator light illuminates. The
wash tank heater and the booster tank heater
begin to heat.

2. The wash water temperature gauge should
indicate a minimum of 150°F/66°C for MH­60,MH-6N and 120°F/60°C for MH-6L.

3. Ware should be placed edgewise in the peg
rack. Cups and bowls should be placed upside
down in the flat rack. Silverware should be
spread evenly in a single layer in the flat rack.

4. In-cycle light illuminates as the dishwasher
begins a 60 second automatic cycle.
The cycle times are listed below:

Wash = 45 seconds
Dwell = 1 second

Final rinse = 14 seconds

5. The final rinse temperature gauge should
indicate a minimum of 180°F/82°C for MH­60/6N. The optimum final rinse temperature
range is between 180-195°F/82-90°C for
MH60/6N. MH-6L optimum is 140°F/60°C.

6. Check the incoming water pressure
during the 10 second final rinse cycle.

7. The 60 second automatic cycle ends.

8. Open the doors. Remove the clean rack.
Insert another rack of soiled ware.
Fully close the doors.

9. Turn power OFF at the dishwasher.
Remove the drain-overflow assembly.
Clean the scrap screens. Clean the
dishwasher after each meal period or
every two hours of operation.

6. The water pressure gauge should indicate a
flowing pressure of 20-22 PSI/138-151.8 kPa.
A pressure reducing valve (PRV) is required if
flow pressure exceeds 20-22 PSI/138-151.8 kPa.

7. The in-cycle light goes out.

8. The 60 second automatic cycle begins again.

9. Dishwasher wash tank drains completely.
Periodic cleaning reduces detergent
consumption and improves washing results.

17

CLEANING

CLEANING

Cleaning your machine is the best maintenance that you can provide. Components that are not
regularly flushed and cleaned do not perform well.

The following schedules are the minimum requirements necessary for the proper performance of
your machine. Intervals should be shortened whenever your machine is faced with abnormal
working conditions, hard water, or multiple shift operations.

Cleaning Schedule

Every 2 Hours or After Each Meal Period

1. Drain the dishwasher.

2. Flush interior with fresh water.

3. Clean scrap screens and pump intake screen.

4. Clean spray arm nozzles.

Every 8 Hours or at the End of the Day

1. Drain the machine.

2. Flush interior with fresh water.

3. Clean scrap screens and pump intake screen.

4. Clean spray arms.

5. Thoroughly clean the exterior
of machine.

DO NOT HOSE DOWN
WITH WATER.

6. Reassemble the machine.

7. Leave doors open to aid in drying.

CAUTION:

!

Do not leave water in wash
tank overnight.

18

CLEANING

Deliming

Your dishwasher should be delimed regularly depending on the mineral content of your water.
Inspect the machine interior for mineral deposits and use a deliming solution for the best
cleaning results.

NOTE:

Consult your chemical supplier for an appropriate deliming solution.

!

WARNING:

Deliming solutions or other acids must not come in contact with household bleach
(sodium hypochlorite) or any chemicals containing chlorine, iodine, bromine, or fluorine.
Mixing will cause hazardous gases to form.
Skin contact with deliming solutions can cause severe irritation and possible
chemical burns. Consult your chemical supplier for specific safety precautions.

Deliming Process

Model MH-60 and MH-6N

1. Remove all dishes from machine.

2. Remove any chemical pick-up tubes from their containers.

3. Place each tube in a container of fresh water and prime the chemical lines for several
minutes to thoroughly flush chemical from the lines. Leave pick-up tubes out of their
containers.

4. Drain the machine and refill with fresh water.

5. Spray interior walls with delimimg solution and let sit for 5 or 10 minutes depending on
amount of build-up. Add deliming solution to wash tank.
Do not let chemicals sit for longer than 15 minutes.

6. Close the doors to run an automatic cycle.

7. Repeat Steps 4-6 if necessary.

8. Lift the drain lever assembly and drain the machine.

9. Refill the machine and run a complete cycle two additional times. Drain and refill the
machine after each cycle to thoroughly flush any deliming solution from the interior of
the machine.

10. Flip the power switch to OFF.

11.Drain machine.

12. Deliming is complete.

19

TROUBLESHOOTING

TROUBLESHOOTING

Perform the seven checks listed below in the event that your dishwasher does not operate
as expected.

1. All switches are ON

2. Drain-overflow assemby is in place and seated

3. Wash and rinse nozzles are clean

4. Wash and rinse pipe assemblies are installed correctly

5. Scrap screens are properly positioned

6. Thermostat(s) are properly adjusted

7. Detergent and rinse additive dispensers are adequately filled

If a problem still exists, use the following table for troubleshooting

CONDITION CAUSE SOLUTION

Machine will not start Doors not closed ................................... Make sure doors are fully closed

Door safety switch faulty ...................... Contact your service agency

Start switch faulty ................................. Contact your service agency

Main switch off ..................................... Check disconnect at main panel

Overload protector tripped ................... Reset overload in Control Box

Machine washes Extended wash switch in ....................... Push Extended wash switch

constantly extended wash position down to the off position

Low or no water Main water supply is turned off ............ Turn on house water supply

Drain-overflow assembly is not ............ Place and seat drain-overflow

in place and seated

Machine doors not fully closed ............. Close doors securely

Faulty fill valve ..................................... Contact your service agency

Machine not filled initially ................... Push Power switch UP to fill

Clogged strainer in fill valve ................ Clean or replace

Stuck or defective float ......................... Check floats and clean

Continuous water filling Defective Circuit Board ........................ Contact your service agency

Fill valve will not close ......................... Clean or replace

Drain-overflow not in place .................. Install drain-overflow assembly

Stuck or defective float switch .............. Inspect or replace float switch

Wash motor not running Overload protector tripped .................... Reset overload in Control Box

Defective motor .................................... Contact your service agency

Wash tank water Incoming water temperature ................. Raise temperature to:

temperature is low at machine too low 110-140°F/43-60°C for MH60
when in use 180°F/82°C for MH-6N

120°F/49°C-140°F/60°C for MH6L

Defective thermometer Check or replace

Defective thermostat ............................. Check for proper setting

or replace

Defective heater element ...................... Check or replace

Defective solenoid valve ....................... Check or replace

Heater elements ..................................... Clean and delime

have soil/lime buildup

20

TROUBLESHOOTING

TROUBLESHOOTING (CONT.)

CONDITION CAUSE SOLUTION

Insufficient pumped Clogged pump intake screen ................. Clean

spray pressure Clogged spray pipe ............................... Clean

Scrap screen full .................................... Must be kept clean and in place

Low water level in tank ........................ Check drain-overflow assembly

Pump motor rotation incorrect .............. Reverse connection between L1

and L2 in Control Cabinet

Defective pump seal .............................. Contact Service Agent

Insufficient final rinse Faulty pressure reducing valve ............. Clean or replace

or no final rinse Improper setting on pressure ................. Set flow pressure at 20-22 PSI/

reducing valve 138-151.8 kPa

Clogged rinse nozzle and/or ................. Clean

pipe

Improper water line size ....................... Have installer change to

proper size

Clogged strainer in fill valve ................ Clean or replace

Low final rinse Low incoming water Check the booster (MH60, MH6N)

temperature temperature ........................................... be sure the thermostat is set to

maintain180°F/82°C temperature.
MH6L check incoming water is set
Min. 120°F/49°C-140°F/60°C.

Check valve to be sure it is clean
and operating

Defective thermometer ......................... Check for proper setting or

replace

Poor washing results Detergent dispenser ............................... Contact detergent supplier

not operating properly

Insufficient detergents........................... Contact detergent supplier

Wash water temperature ....................... See condition “Wash Tank

too low Water Temperature” above

Wash arm clogged ................................ Clean

Improperly scraped dishes .................... Check scraping procedures

Ware being improperly ......................... Use proper racks. Do not

placed in rack overload racks

Improperly cleaned ............................... Unclog wash sprays and rinse

equipment nozzles to maintain proper

pressure and flow conditions.
Overflows must be open. Keep

wash water as clean as possible.

Heater elements..................................... Clean and delime

have soil/lime buildup

21

BASIC SERVICE

BASIC SERVICE

This Basic Service section does not cover all possible repair procedures. If you require additional
service support, you may call your local service company or:

Please have the Model and Serial Number of the machine ready when you call.

Electrical Service

NOTE:

DO NOT USE CHASSIS GROUND WHEN PERFORMING VOLTAGE CHECKS.
Doing so will result in false and inaccurate readings.

PERFORM VOLTAGE CHECKS BY READING FROM THE HOT SIDE OF THE
LINE AND NEUTRAL (any #2 or white wire).

Moyer Diebel National Service

USA: 1-800-858-4477

Canada: 1-800-263-5798

WARNING:

!

USE EXTREME CAUTION when performing tests on energized circuits.

WARNING:

!

When repairing a circuit, disconnect the power at the main service disconnect switch and
place a tag at the disconnect switch to indicate that work is being performed on the circuit.

Troubleshooting

Schematics

Moyer Diebel places an electrical schematic in the control cabinet of every machine before it is
shipped. Schematics are included at the back of this manual as well. Be aware that these schemat­ics include options that may not apply to your machine. Options are enclosed in dashed lines with
the words (IF USED) next to them on the schematic. Disregard any options that appear on the
schematics which are not a part of your machine.

Tools

All electrical repairs can be made with: Standard set of hand tools

Volt/Ohm Meter (VOM)
Clip-on AC current tester

Circuit Tests

Use a clip-on AC current tester to check the motors and electric heaters.
Use a VOM to test line voltages and the 115VAC control circuit.

22

Electrical Service (Cont.)

Fuses —

BASIC SERVICE

Refer to Fig. 12.
There are two fuse blocks. A 3 pole block
(A) is located in the main control cabinet.
The (A) fuses protect the wash tank heater
circuit. Booster heater circuits
(MH-60 only) are not fused. A 2 pole
fuse block is located on the machine base
to protect the control circuit.

To Replace a fuse:
Turn the dishwasher main power switch
off. Disconnect power to the machine at
the main service disconnect switch.
Replace the fuse. If the fuse blows again,
DO NOT INCREASE THE FUSE SIZE.
DETERMINE THE CAUSE OF THE OVERLOAD.

Motor Overloads

The wash pump motor has an overload to protect it from line
voltage electrical overloads. The overload disconnects
120VAC power to the motor contactor coil.

—

A

Figure 12

Wash tank heater fuses

Control Cabinet

Switch Lever

Refer to Fig. 13.

Note the Switch Lever on the Overload.

If the switch lever is off with the “0” showing
then the overload has tripped.

To Reset the Motor Overload:

Flip the overload switch to the On position.
A “1” should be visible on the switch lever.

To Replace a Motor Overload:

Disconnect the wires to the overload.
Release the mounting catch on the front
side of the overload. Push forward and lift out.
Snap the new overload into place and reconnect
the wires.

To adjust the overload setting:

The screwdriver in Fig. 15 is positioned
to adjust the motor overload AMP setting.
Read the full load amps (FLA) motor amps on the motor
nameplate. Turn setting to match the motor nameplate.

Figure 13

Motor Overload

23

BASIC SERVICE

Solid State I-DH Operating Instructions

Automatic Operation

1. Check that drain is closed and screens are clean and in place.

2. Turn on main power to the machine.

3. Flip machine control panel power switch to ON.

4. Close doors.

• Machine pauses 4 seconds to check water level.

5. Machine fills for 110 seconds if float is down.

6. Run machine through several cycles or wait for 10 minutes (on initial start up) for tempera­tures to stabilize.

7. Open door, insert rack of dishes.

8. Close doors. Automatic cycle begins.

9. Machine cycle is:

Wash = 45 secs.
Dwell = 1 sec.
Rinse = 18 secs.

10. Open door, remove clean rack of dishes.

11.Repeat for additional racks.

• If Extended wash switch is operated, then machine will wash continually until Extended

wash switch is taken off. Machine will immediately enter rinse cycle if more than 49
seconds has elapsed. If less than 49 seconds has elapsed when the extended wash is ended,
then the machine will complete the remaining wash time and then finish with a final rinse.

Troubleshooting Timer Circuit Board

1.1 Introduction

The following procedures are for determining whether or not the timer circuit board itself is
faulty.

In this part –

• Checking the general condition of the circuit board.

• Testing inputs.

• Testing outputs.

24

Special Tools

• A voltmeter capable of reading DC and AC volts.

1.2 Checking General Condition

Before testing the inputs and outputs, you should first check that the board is receiving power.

Turn on the power switch to the unit (do not start the unit, just turn on power to the unit). If red
“Power” LED on board is illuminated, go directly to Step 1.3. When LED is not illuminated, then
check that the following conditions are true:

BASIC SERVICE

Troubleshooting Timer Circuit Board (cont.)

Power Terminals

• Verify that the board is receiving power of 120 VAC at the terminals:

– T2, marked “H” (AC Hot).

– T1, marked “N” (AC Neutral).

If either of these terminals is not receiving 120 VAC, then there is a problem elsewhere with
the unit not receiving power.

The Fuse (F1)

• Verify that the circuit board fuse (F1) is good.

If it is not, replace it.

Red ‘Power’ LED

• Verify that the red ‘power’ LED is illuminated.

If it is not, and the previous 2 conditions are true, then the board is bad and should be
replaced.

1.3 Testing Board Inputs

After you have verified that the circuit board is receiving power (as explained above), then test
the board inputs. There are 4 board inputs:

• Start Switch (not used on this model).

•Door Safety Switch.

• Float Switch.

• Extended Wash Switch (if installed).

Perform the following steps to test a board input:

1. Set the voltmeter to measure DC volts.

2. Place the negative (black) test probe on the “hot” terminal:

• T2, marked “H”.

3. Place the positive (red) test probe on the input terminal to be tested:

• T7, marked “START SW” (for the start switch, not used on this model).

• T8, marked “DOOR SW” (for the door safety switch).

• T9, marked “FLOAT SW” (for the float switch).

• T10, marked “EXT. WASH” (for the extended wash switch).

4. Check the results on the voltmeter:

• If switch is opened – the meter should read between 4.7 to 5.3 DC volts.

• If the switch is closed – the meter should read between 0 to 1 DC volts.

25

BASIC SERVICE

BASIC SERVICE

1.4 Testing Board Outputs

After you have verified that the circuit board is receiving power (as explained above), then test
the board outputs. There are 4 board outputs:

• Wash Cycle.

• Rinse Cycle.

• Heaters.

• In-Cycle Lamp.

Perform the following steps to test a board output:

1. Set the voltmeter to measure AC volts.

2. Place the negative (black) test probe on the “neutral” terminal:

• T1, marked “N”.

3. Place the positive (red) test probe on the output terminal to be tested:

• T3, marked “WASH OUTPUT” (for the wash cycle) (doors must be closed before testing).

• T4, marked “RINSE OUTPUT” (for the rinse cycle) (doors must be closed before testing).

• T5, marked “HEATERS OUTPUT” (for the water heater).

• T6, marked “LAMP OUTPUT” (for the in-cycle lamp indicator).

4. Check the results on the voltmeter for the terminal you are testing:

• For T3 – the meter should read 120 VAC whenever the unit is in-cycle and the “WASH”

LED is illuminated on the circuit board.

• For T4 – the meter should read 120 VAC whenever the unit is in a fill or rinse mode and the

corresponding “FILL” or “RINSE” LED is illuminated on the circuit board.

• For T5 – the meter should read 120 VAC whenever the power switch is on and the wash

tank is full (i.e., the float switch is up).

• For T6 – the meter should read 120 VAC whenever the machine is in-cycle.

F1

H

T2

N

T1

START SW.

T7

DOOR SW.

T8

FLOAT SW.

T9

EXT. WASH

T10

L2

FILL RINSE WASH

U1

L3 L4

Control Board

POWER

JB3

JB2

Figure 14

Solid State

L1

JB1

WASH

OUTPUT

T3

RINSE

OUTPUT

T4

HEATERS

OUTPUT

T5

LAMP

OUTPUT

T6

26

BASIC SERVICE

Models MH-60, MH-6N, and MH-6L use a float switch and circuit board
to control tank fill and tank heat.

For Model MH-60 only, the built-in booster heat circuit is also con­trolled by the float switch.

Operation:

1. When dishwasher main power switch is turned on (wash tank
empty), the drain valve closes allowing cycle time to run for a
minimum of 110 seconds to fill the tank.

2. The float switch ball rises; its normally open contacts close. The fill
circuit times out; the fill solenoid de-energizes, and the tank heat and
booster heat energize.

3. If water level drops below the float level, the float switch ball moves down; heat
de-energizes. The fill solenoid energizes and the fill cycle runs for a minimum of 110
seconds to refill the tank.

4. If the tank is not full of water at the end of the 110-second fill cycle, then the machine
will cycle again. When the float switch is satisfied, the fill cycle stops after completing
its 110-second cycle.

Figure 15

Float Switch

5. Refer to the float switch troubleshooting chart below (Fig. 16) for a quick guide to
evaluating float switch problems.

Wash

Tank Fills Constantly

Is Tank Full

of Water?

YES

Is the Float

Ball Up?

YES

Is Heat ON

when called

for?

YES

NO

NO

NO

Check

Drain

Clean

Float
Assy

Replace

Float

Check

Solenoid

Valve

System
Checks

Figure 16

Float Switch

Troubleshooting Chart

27

BASIC SERVICE

1L1

1L2

1L3

1L1

1L2

1L3

Electrical Service (Cont.)

Heater Element Wiring – Booster Tank and Wash Tank Heater Elements

Refer to the illustrations and follow the steps below to properly install terminal jumpers and to
make line power connections to a replacement element.

Step 1. Hold the element assembly with the calrod coils facing toward you.

Step 2. Match your element coil to Configuration A, B, C, or D.

Step 3. Rotate your element coils to match the correct configuration.

Step 4. Turn the element over and match your element to the correct terminal configuration.

Step 5. Install terminal jumpers according to the illustration for your voltage requirement.

Step 6. Install the element and make your line connections 1L1, 1L2, or 1L3 per the illustration.

Configuration A

Booster tank element
View of calrod coils

Configuration B

Booster tank element
View of calrod coils

Configuration C

Booster tank element
View of calrod coils

Terminal Connections View of element

1L1

1L2

1L3

1L1

1L2

208V/1 Phase 208-240V/3 Phase 480V/3 Phase 208-240V/3 Phase

Delta Connection 575V/3 Phase Wye Connection for

Delta Connection 380-415V/3 Phase

1L3

1L1

1L2

Terminal Connections View of element

1L1

1L2

1L1

1L2

1L3

208V/1 Phase 208-240V/3 Phase 480V/3 Phase 208-240V/3 Phase

Delta Connection 575V/3 Phase Wye Connection for

1L1

1L2

1L3

1L3

1L1

1L2

Delta Connection 380-415V/3 Phase

Terminal Connections View of element

1L2

1L1

1L2

1L1

1L3

1L2

1L1

1L3

208V/1 Phase 208-240V/3 Phase 480V/3 Phase 208-240V/3 Phase

Delta Connection 575V/3 Phase Wye Connection for

Delta Connection 380-415V/3 Phase

Configuration D

Terminal Connections View of element

Wash tank element
View of calrod coils

1L1

1L2

1L1

1L3

1L2

1L1

1L3

1L2

208V/1 Phase 208-240V/3 Phase 480V/3 Phase 208-240V/3 Phase

Delta Connection 575V/3 Phase Wye Connection for

Delta Connection 380-415V/3 Phase

1L1

1L2

1L3

Figure 17

Heater Element Wiring

28

BASIC SERVICE

Electrical Service (Cont.)

Motor Connections —

1. Models MH-60, MH-6N, and MH-6L are available in either single phase or 3 phase voltages.

2. Motor rotation was set at the factory. For three phase machines, reversing the motor direction
is done in the control cabinet by reversing the wires L1 and L2 on the disconnect side of the
main electrical connection block. For single phase machines, motor rotation is changed at the
motor connection plate on the rear of the single phase motor (if necessary).

Refer to Fig. 20 for the proper wiring of the pump motor for single and three phase voltages.

SINGLE PHASE - LOW VOLTAGE

L1

3

4

L2

LINE

J

8

LINE

2

Pump Motor Wiring Diagrams

208-240V

THREE PHASE - LOW

VOLTAGE

654

987

SINGLE PHASE - HIGH VOLTAGE

Figure 18

480V

THREE PHASE - HIGH

VOLTAGE

654

987

L1

3

4

L2

8

LINE

J

2

LINE

575V ONLY

THREE PHASE

321

LINE

321

LINE

321

LINE

29

BASIC SERVICE

MECHANICAL SERVICE

Pump Seal Replacement

1. Disconnect the power to the machine at the main breaker panel or fuse box.

2. Drain the machine.

3. Remove the front and side panels.

4. Remove drain plug on the pump volute and drain the pump.

5. Remove the pump hoses.

6. Disconnect the wires to the motor at the motor junction box.

7. Unbolt motor from machine base and remove the pump/motor assembly.

8. Remove bolts on volute and carefully remove from the pump flange.

9. Remove the impeller retaining bolt and nut from center of impeller.

10. Lock the motor shaft with a wrench or pliers. The back of motor shaft is square.

11.Turn the impeller counter-clockwise to remove from shaft (right hand threads).

12. Remove the old seal and discard.

13. Check seal seat in the pump flange and clean thoroughly.

14. Press rubber seal/ceramic portion of seal assembly into the pump flange. Use a water
soluble lubricant. Be careful to keep the ceramic clean.

15. Install the rotating part of the seal on the shaft with the graphite surface toward the ceramic.
Use a water soluble lubricant on the rubber seal part only (not the graphite).

16. Reinstall impeller, and new flange gasket. Reinstall bolts. Reinstall drain plug.

17. Reinstall the pump/motor assembly and reconnect the pump hoses.

18. Fill the dishwasher with water.

19. Check motor rotation by bump starting motor.
Correct motor shaft rotation is clockwise when viewing motor from the rear.

20. Test run and check for leaks.

30

Water
Slinger

Backing Plate

Pump Flange

Seal Assy.

Backing Plate

Mtg. Nut

Figure 19

Pump Seal Replacement

Impeller

Washer

Nut

Gaskets

Bolt

(B)

Bolt

(A)

Volute

Plug

REPLACEMENT PARTS

REPLACEMENT

PARTS

31

REPLACEMENT PARTS

9

14

12

12

13

13

12

8

1

1

2

3

7

11

8

10

4

5

6

11

11

9

10

32

Figure 20 - MH-60/6N/6L

Doors and Panels

REPLACEMENT PARTS

MH-60/6N/6L

DOORS AND PANELS

Fig. 20 Part
Item No. No. Part Description Qty.

1 325409 Side Door ...................................................................................... 2

2 325405 Front Door ..................................................................................... 1

3 321929 RH Panel, No Cut Out ................................................................... 1

4 321930 Panel, Instrument .......................................................................... 1

5112389 Decal, Control Panel ..................................................................... 1

6 322074 Panel, Front Lower ........................................................................ 1

7 321941 LH Panel w/Cut Out ...................................................................... 1

8 108418 Plug Plastic .................................................................................... 2

9 109034 Washer 13/16 x 1-13/16 Plastic..................................................... 2

10 108417 Nut, Plastic .................................................................................... 2

11 100779 Screw 1/4-20 x 5/8 Truss Head ..................................................... 6

12 0504822 Screw 8-32 x 1/2 Pan Head. .......................................................... 4

13 100763 Screw 10-32 x 1 Round Head ....................................................... 2

14 112587 Foot, Cast Grey ............................................................................. 4

33

REPLACEMENT PARTS

1

7

5

6

8

2

9

2

34

3

Figure 21 - MH-60/6N/6L

Door Guides, Stops, and Lift Bracket

2

4

REPLACEMENT PARTS

MH-60/6N/6L

DOOR GUIDES, STOPS, AND LIFT BRACKET

Fig. 21 Part
Item No. No. Part Description Qty.

1 108053 Plug, Cornerpost ................................................................................. 2

2 107966 Nut, Grip 10-32 W/Insert ................................................................... 10

3 0309277 Bracket, Door Lift .............................................................................. 1

4 100097 Screw 10-32 x 1/2" Truss Head.......................................................... 10

5 108347 Guide, Door ........................................................................................ 6

6 108410 Gasket, Door Guide (26") .................................................................. 12

7 107970 Screw 8-32 x 1 Filister ....................................................................... 36

8 100007 Screw 10-32 x 3/8 Truss Head ........................................................... 2

9 0307328 Stop Door ........................................................................................... 2

35

REPLACEMENT PARTS

28 30

29

2

1

30

3

5

2

3

6

4

1

9

7

24

24

5

6

26

27

9

10

11

26

11

10

24

25

8

12

13

14

26

27

7

11

8

10

26

11

24

25

20

21

20

18

23

22

19

12

15

13

14

16

17

18

Figure 22 - MH-60/6N/6L

Door Handle, Spring Assembly, and Safety Switch

10

36

REPLACEMENT PARTS

MH-60/6N/6L

DOOR HANDLE, SPRING ASSEMBLY, AND SAFETY SWITCH

Fig. 22 Part
Item No. No. Part Description Qty.

1 0509168 Bolt 5/16-18 x 11 Hex Head .............................................................. 2

2 108066 Spring, Extension ............................................................................... 2

3 107397 Block, Spring Hook ............................................................................ 2

4 0509166 Door Handle ....................................................................................... 1

5 107437 Bolt M6 x 45MM Hex Head .............................................................. 4

6 107396 Block, Upper Pivot ............................................................................. 2

7 107393 Pin, Pivot ............................................................................................ 2

8 0508864 Handle, Grip ....................................................................................... 2

9 107395 Block, Lower Pivot ............................................................................ 2

10 107420 Nut, Plain M6 ..................................................................................... 8

11 107436 Screw M6 x 16MM Filister ................................................................ 6

12 107399 Support, Pivot Block .......................................................................... 2

13 108368 Gasket, Backing ................................................................................. 2

14 304811 Plate, Backing .................................................................................... 2

15 100740 Bolt 5/16-18 x 1 Hex Head ................................................................ 2

16 107966 Nut, Grip 10-32 w/Nylon Insert ......................................................... 8

17 322077 Guard, Splash ..................................................................................... 2

18 100097 Screw 10-32 x 1/2 Truss Head ........................................................... 8

19 0509264 Bushing, Side Door ............................................................................ 2

20 0509274 Nut, Acorn 5/16-18 SST ..................................................................... 2

21 0309167 Lift Bar, Door ..................................................................................... 2

22 102376 Washer, Flat ........................................................................................ 2

23 104002 Bolt 5/16-18 x 1-1/2 ........................................................................... 2

24 100154 Nut, Plain 5/16-18 .............................................................................. 4

25 106013 Washer, Lock 5/16 Split ..................................................................... 2

26 102376 Washer 5/16 x 3/4 x 1/16 .................................................................... 4

27 321927 Spring Anchor Bracket ....................................................................... 1

28 0509199 Switch, Door Safety ........................................................................... 1

29 0309451 Bracket, Switch .................................................................................. 1

30 107967 Nut, Grip (1/4-20 w/Nylon Insert) ..................................................... 2

37

REPLACEMENT PARTS

1

2

2

3

1

4

2

3

3

4

4

2

3

4

Figure 23A – MH-60/6N/6L

Straight Track Assembly

6

2

6

8

6

1

6

7

8

9

10

7

4

6

11

7

9

10

5

11

7

6

7

3

7

9

10

8

8

9

10

Figure 23B – MH-60/6N/6L

Corner Track Assembly

38

REPLACEMENT PARTS

MH-60/6N/6L

STRAIGHT TRACK ASSEMBLY

Fig. 23A Part
Item No. No. Part Description Qty.

1 0309472 Track, Rear ......................................................................................... 1

2 100073 Screw 1/4 -20 x 1/2 Truss Hd............................................................. 8

3 106482 Washer, Lock ...................................................................................... 8

4 100003 Nut (1/4-20 Hex Hd) .......................................................................... 8

MH-60/6N/6L

CORNER TRACK ASSEMBLY

Fig. 23B Part
Item No. No. Part Description Qty.

1 0309469 Guide, Right Hand ............................................................................. 1

2 0309472 Track, Rear ......................................................................................... 1

3 0309468 Guide, Left Hand................................................................................ 1

4 0309470 Support, Rack ..................................................................................... 1

5 0309471 Track, Front ........................................................................................ 1

6 106727 Screw (10-32 x 5/8 Flat Hd) ............................................................... 6

7 107966 Nut, Grip (10-32 w/Nylon Insert)....................................................... 6

8 100073 Screw 1/4 -20 x 1/2 Truss Hd............................................................. 8

9 106482 Washer, Lock ...................................................................................... 8

10 100003 Nut (1/4-20 Hex Hd) .......................................................................... 8

11 0309473 Spacer ................................................................................................. 2

39

REPLACEMENT PARTS

2

3

7

8

5

1

10

6

4

9

7

5

2

11

13

10

12

8

FRONT

3

LEFT SIDE

40

Figure 24 - MH-60/6N/6L

Wash/Rinse Spray Piping

REPLACEMENT PARTS

MH-60/6/6L

WASH/RINSE SPRAY PIPING

Fig. 24 Part
Item No. No. Part Description Qty.

1 324526 Rinse Manifold Weldment .................................................................. 1

2113027 Connector, Rinse Arm ........................................................................ 2

3113028 Top Rinse Arm Connector .................................................................. 2

4 0507445 Spindle, Wash Arm ............................................................................. 2

5 109864 Support, Wash Arm ............................................................................ 2

6 109781 Standpipe, Wash ................................................................................. 1

7 100736 Bolt 1/4-20 x 3/4 Hex Head ............................................................... 2

8 107967 Nut, Grip 1/4-20 ................................................................................. 3

9 109854 Gasket, Standpipe Wash ..................................................................... 1

10 100740 Bolt 5/16-18 x 1" Hex Head ............................................................... 4

11 106013 Washer, Lock 5/16 Split ..................................................................... 4

12 102376 Washer, Flat ........................................................................................ 8

13 100154 Nut, Plain 5/16-18 .............................................................................. 4

41

REPLACEMENT PARTS

4

10

9

2

1

9

3

2

5

3

6

7

8

42

Figure 25 - MH-60/6N/6L

Wash/Rinse Spray Arms

REPLACEMENT PARTS

MH-60/6N/6L

WASH/RINSE SPRAY ARMS

Fig. 25 Part
Item No. No. Part Description Qty.

1 0507443 Spindle, Rinse Arm ............................................................................ 2

2 0508376 Nozzle, Rinse Arm (MH-60, MH-6N Only) ...................................... 12

3113514 Bearing, Rinse Arm Plastic DM (Replaces 112164).......................... 4

4 0707453 Rinse Arm Assy. (Includes 2 & 3) ...................................................... 2

5 0507444 Nut, Rinse Arm ................................................................................... 2

6 109835 Screw (#8 x 1/2 Pan Hd) .................................................................... 4

7 0707452-SWash Arm Assy (Includes 6 & 8) ....................................................... 2

8 0507446 Bearing, Wash Arm ............................................................................ 2

9 0507451 Nozzle Rinse Arm (SST) (Model MH-6L Only)................................ 12

10 0708899 Rinse Arm Assy. (Model MH-6L Only) (Includes 3 & 9).................. 1

— 0707450 Rinse Arm (Does Not Include Items 2, 3 or 9) ..................................

— 0707456 Wash Arm (Does Not Include Item 8)................................................

43

REPLACEMENT PARTS

1

2

3

4

5

16

7

6

16

8

9

10

11

12

44

13

14

15

Figure 26 - MH-60/6N/6L

Drain Assembly and Scrap Screens

REPLACEMENT PARTS

MH-60/6N/6L

DRAIN ASSEMBLY AND SCRAP SCREENS

Fig. 26 Part
Item No. No. Part Description Qty.

1112393 Knob, Drain Lift ................................................................................. 1

2112394 Rod Assy., Drain Lift ......................................................................... 1

3112392 Guide, Drain Lift ................................................................................ 1

4 100097 SCREW (10-32 x 1/2" Truss Hd) ....................................................... 2

5 322159 Retainer, Overflow ............................................................................. 1

6 321939 Filler, Drain Plate (Retained By Spring Clip) .................................... 1

7 322120 Filler, Drain Plate (Retained By Stud and Nut) (Not Shown)............ 1

8 100194 Nut, Grip (10-32 SST)........................................................................ 2

9 100141 Nut, Grip (1/4-20 SST) ...................................................................... 1

10 322006 Tube, Overflow .................................................................................. 1

11 107680 Seat Rubber, Overflow Tube .............................................................. 1

12 205813 Drain Basket, Modified ...................................................................... 1

13 112044 Slip Nut .............................................................................................. 1

14 112045 Washer, Tailpiece................................................................................ 1

15 107473 Tailpiece ............................................................................................. 1

16 305164 Screen, Scrap ...................................................................................... 2

45

REPLACEMENT PARTS

7

8

16

5

7

8

16

Thermostat bracket detail

13

12

4

11

19

5

18

18

10

3

2

1

14

15

17

20

6

4

3

9

46

Figure 27 - MH-60/6N/6L

Wash Tank Heat and Thermostats

REPLACEMENT PARTS

MH-60/6N/6L

WASH TANK HEAT AND THERMOSTATS

Fig. 27 Part
Item No. No. Part Description Qty.

1113622 Thermometer 4 Ft. Gas Filled (Replaces 108391) ............................. 1

2 109069 Thermostat W/Cap 110-220°F ........................................................... 1

3 201041 Washer ................................................................................................ 3

4 201029 Nut, Lock 1/2" .................................................................................... 3

5 322076 Dual Thermostat Bracket ................................................................... 1

6110561 Thermostat, Fixed High Limit ............................................................ 1

7 106482 Washer, Lock 1/4 Split SST ............................................................... 4

8 100003 Nut, Plain 1/4-20 SST ........................................................................ 4

9 100740 Bolt 5/16-18 x 1 Hex Head ................................................................ 4

10 108345 Gasket 3 x 3-1/8 x 2".......................................................................... 1

11 102376 Washer 5/16 x 3/4 x 1/16.................................................................... 8

12 106013 Washer, Lock 5/16 Split ..................................................................... 4

13 100154 Nut, Plain 5/16-18 SST ...................................................................... 4

14 0509637 Heater 3KW 115V/1PH ...................................................................... 1

0509185 Heater 3KW 208-240/380-415V 1/3PH............................................. 1

0509373 Heater 3KW 460V/3PH ..................................................................... 1

0507707 Heater 3KW 575V/3PH ..................................................................... 1

15 100007 Screw 10-32 X 3/8 Truss Head .......................................................... 4

16 107966 Nut, Grip 10-32 W/Nylon Insert ........................................................ 4

17 111092 Float Switch ....................................................................................... 1

18 104882 Washer ................................................................................................ 2

19 107089 Nut, Jam 1/2 - 13 ................................................................................ 1

20 111151 C-Clip Float Switch............................................................................ 2

47

REPLACEMENT PARTS

TO UPPER PIPING

FROM FILL VALVE

5

3

4

6

7

8

9

10

11

12

1

1

2

2

48

Electric Booster and Thermostats

Figure 28- MH-60 Only

REPLACEMENT PARTS

MH-60 ONLY

ELECTRIC BOOSTER AND THERMOSTATS

Fig. 28 Part
Item No. No. Part Description Qty.

1 100740 Bolt 5/16-18 x 1 Hex Head ................................................................ 2

2 102376 Washer, Flat 5/16 x 3/4 x 1/16 ........................................................... 2

3 108954 Nut, Grip 6-32 W/Insert ..................................................................... 2

4110562 Thermostat, High Limit ...................................................................... 1

110563 Compound, Heat Sink ........................................................................ A/R

5 109069 Thermostat, Booster ........................................................................... 1

6 100003 Nut, Plain 1/4-20 SST ........................................................................ 3

7 106482 Washer, Lock 1/4 Split ....................................................................... 3

8 111334 Heater 9KW 208-240/380-415V, 40° Rise (1 & 3 Phase) .................. 1

108579 Heater 9KW 480V, 40° Rise (3 Phase Only) .................................... 1

111122 Heater 9KW 575V, 40° Rise (3 Phase Only) ..................................... 1

9 111266 Heater 18KW 208-240/380-415V, 70° Rise (1 & 3 Phase) ................ 1

111267 Heater 18KW 480V, 70° Rise (3 Phase Only) ................................... 1

111600 Heater 18KW 575V, 70° Rise (3 Phase Only) ................................... 1

10 109985 Seal, Electric Heater ........................................................................... 1

11 100210 Plug 1/8 SST ...................................................................................... 1

12 0509042 Tank, Booster ..................................................................................... 1

49

REPLACEMENT PARTS

17

18

16

2

CUSTOMER

WATER

INLET

20

15

19

4

3

14

5

9

12

8

11

13

TO UPPER

PIPING

10

2

6

1

5

7

5

50

Figure 29 - MH-60 Only

Lower Fill Piping Assembly

REPLACEMENT PARTS

MH-60 ONLY

LOWER FILL PIPING ASSEMBLY

Fig. 29 Part
Item No. No. Part Description Qty.

1112387 Line Strainer/PRV Combo.................................................................. 1

2 102444 Street Ell 3/4" NPT Brass ................................................................... 2

3 102651 Nipple 3/4" x 2" Brass ........................................................................ 1

4 111437 Valve 3/4" NPT Hot Water ................................................................. 1

5 100184 Nipple 3/4" NPT................................................................................. 3

6 102525 Tee 3/4" x 1/2" x 3/4" Brass ............................................................... 1

7 100571 Union 3/4" NPT Brass ........................................................................ 1

8 102388 Bushing Reducer 1/2" x 1/4" Brass .................................................... 1

9112437 Valve, Needle 1/4" .............................................................................. 1

10 102392 Bushing Reducer 3/4" x 1/2" Brass .................................................... 1

11 107419 Barb, Hose 1/2 NPT x 1/2 Hose ......................................................... 1

12 105994 Clamp, Hose ....................................................................................... 1

13 107417 Hose, 1/2" I.D..................................................................................... 9ft.

14 107065 Connector, Male 1/4" O.D. x 1/4 NPT ............................................... 1

15 107928 Tubing, High Density ......................................................................... 3ft.

16 111100 Elbow, Female 1/4" O.D. x 1/8 NPT .................................................. 1

17 109812 Gauge, Pressure 0-100 PSI ................................................................. 1

18 109816 Overlay, Gauge 20-30 PSI ................................................................. 1

19 108516 Coil, Solenoid Valve (120V) .............................................................. 1

20 109903 Kit, Repair, 3/4" Solenoid Valve ........................................................ 1

21 324597 Booster Piping Stabilizer (Not Shown) .............................................. 1

22 324598 Booster Piping Stabilizer Clip (Not Shown) ...................................... 1

51

REPLACEMENT PARTS

17

9

7

14

13

3

12

3

10

11

4

8

15

1

16

8

2

5

6

52

WATER IN FROM

LOWER PIPING

Figure 30 - MH-60/6N Only
Upper Fill Piping Assembly

REPLACEMENT PARTS

MH-60/6N ONLY

UPPER FILL PIPING ASSEMBLY

Fig. 30 Part
Item No. No. Part Description Qty.

1 100156 Locknut 3/4" NPT Brass .................................................................... 1

2 100571 Union, 3/4" NPT Brass ....................................................................... 1

3 102392 Bushing, Reducing 3/4" x 1/2" NPT Brass ........................................ 2

4 100599 Cross, 3/4" NPT Brass........................................................................ 1

5 108181 Bushing, Reducing 3/4" x 1/4" NPT Plastic ...................................... 1

6 107463 Plug 1/4" NPT Plastic......................................................................... 1

7 102444 Elbow, Street 3/4" x 90 Brass ............................................................. 1

8 100184 Nipple, Close 3/4" NPT Brass ............................................................ 2

9 104429 Vacuum Breaker 3/4" (Prior to S/N D3290) ...................................... 1

9113222 Vacuum Breaker 3/4" (After S/N D3291) .......................................... 1

10 107419 Hose Barb 1/2" NPT .......................................................................... 1

11 105994 Hose Clamp ........................................................................................ 1

12 0309426 Piping Support Bracket ...................................................................... 1

13 104682 Thermometer 1/2" .............................................................................. 1

14 102489 Nipple 3/4" x 2-1/2" NPT Brass. ........................................................ 1

15 102521 Tee 3/4" NPT Brass ............................................................................ 1

16 102505 Plug 3/4" NPT Brass .......................................................................... 1

17 108349 Repair Kit 3/4" Vacuum Breaker (Not Shown)

(Prior to S/N D3290) .......................................................................... 1

17 113223 Repair Kit 3/4" Vacuum Breaker (Not Shown)

(After S/N D3291).............................................................................. 1

53

REPLACEMENT PARTS

1

CUSTOMER

WATER IN

11

17

2

3

4

5

9

12

TO UPPER

PIPING

8

5

18

7

6

10

16

13

54

15

14

Figure 31 - MH-6N/6L Only

Lower Fill Piping Assembly

REPLACEMENT PARTS

MH-6N/6L ONLY

LOWER FILL PIPING ASSEMBLY

Fig. 31 Part
Item No. No. Part Description Qty.

1 102444 Elbow, Street 3/4" NPT Brass ............................................................ 1

2 0309340 Plumbing, Support Bracket ................................................................ 1

3110768 Line Strainer 3/4" Brass ..................................................................... 1

4 111437 Valve, 3/4" NPT ................................................................................. 1

5 100184 Nipple, Close 3/4" NPT Brass ............................................................ 2

6 102525 Tee 3/4" x 1/2" x 3/4" NPT Brass ...................................................... 1

7 102392 Bushing, Reducing 3/4" x 1/2" NPT Brass ........................................ 1

8 107419 Hose, Barb 1/2" NPT x 1/2" Hose...................................................... 1

9 105994 Hose Clamp ........................................................................................ 1

10 102388 Bushing, Reducing 1/2" x 1/4" NPT Brass ........................................ 1

11 112437 Needle, Valve 1/4" NPT Brass ........................................................... 1

12 107417 Hose 1/2" ID....................................................................................... 6ft

13 101261 Street, Ell 1/4" NPT Brass .................................................................. 1

14 107065 Adapter, 1/4" OD x 1/4 MPT Plastic.................................................. 1

15 107928 Tubing, High Density ......................................................................... 3ft

16 111100 Elbow, Female 1/4" OD x 1/8 NPT .................................................... 1

17 109812 Gauge, Pressure 0-100 PSI ................................................................. 1

18 109765 Overlay, Gauge ................................................................................... 1

19 109903 Kit, Repair 3/4" Solenoid Valve ......................................................... 1

55

REPLACEMENT PARTS

18

9

7

14

13

3

12

3

10

11

4

17

8

15

16

8

2

5

6

56

1

WATER IN FROM

LOWER PIPING

Figure 32 - MH-6L Only

Upper Fill Piping Assembly

REPLACEMENT PARTS

MH-6L ONLY

UPPER FILL PIPING ASSEMBLY

Fig. 32 Part
Item No. No Part Description Qty.

1 100548 Locknut 3/4" NPT SST ...................................................................... 1

2 100571 Union, 3/4" NPT Brass ....................................................................... 1

3 102392 Bushing, Reducing 3/4 NPT x 1/2" NPT Brass ................................. 2

4 100599 Cross 3/4" NPT Brass......................................................................... 1

5 108181 Bushing, Reducing 3/4" x 1/4" NPT Plastic ...................................... 1

6 107463 Plug 1/4" NPT Plastic......................................................................... 1

7 102444 Elbow, Street 3/4" x 90 Brass ............................................................. 1

8 100184 Nipple, Close 3/4" Brass .................................................................... 2

9 104429 Vacuum Breaker 3/4" NPT (Prior to S/N D3290) .............................. 1

9113222 Vacuum Breaker 3/4" NPT (After S/N D3291) .................................. 1

10 107419 Hose, Barb 1/2" NPT x 1/2" Hose Brass ............................................ 1

11 105994 Hose Clamp ........................................................................................ 1

12 0309426 Plumbing Support Bracket ................................................................. 1

13 104682 Thermometer 1/2" .............................................................................. 1

14 102489 Nipple 3/4" NPT x 2-1/2" Brass ......................................................... 1

15 203183 Tee, 3/4" NPT Modified SST ............................................................. 1

16 102505 Plug 3/4" NPT SST ............................................................................ 1

17 107424 Plug 1/8" NPT Plastic......................................................................... 1

18 108351 Repair Kit 3/4" Vacuum Breaker (Prior to S/N D3290) ..................... 1

18 113223 Repair Kit 3/4" Vacuum Breaker (After S/N D3291) ........................ 1

57

REPLACEMENT PARTS

1

2

3

7

4

6

5

8

9

10

11

12

13

14

16

17

18

19

20

21

22

23

24

25

28

27

29

30

31

32

26

58

Figure 33 - MH-60/6N/6L

Pump Assembly

REPLACEMENT PARTS

MH60/6N/6L

PUMP ASSEMBLY

Fig. 33 Part
Item No. No. Part Description Qty.

1 324580 Strainer ............................................................................................... 1

2 107966 Nut, Grip 10-32 w/Nylon Insert ......................................................... 1

3 104203 Clamp, Hose ....................................................................................... 2

4 104165 Clamp, Hose ....................................................................................... 1

5 107340 Clamp, Hose ....................................................................................... 1

6112383 Hose Pump, Discharge ....................................................................... 1

7 109562 Hose, Suction ..................................................................................... 1

8 100734 Bolt 1/4-20 x 1/2" Hex Head.............................................................. 1

9 106482 Washer, Lock 1/4" Split...................................................................... 1

10 110247 Nut, Hex Jam 7/16-20 ........................................................................ 1

11 110248 Washer, Flat ........................................................................................ 1

12 107463 Plug 1/4" ............................................................................................. 1

13 107137 Bolt 10-32 x 7/8 Hex Head ................................................................ 11

14 100194 Nut, Grip (10-32) ............................................................................... 11

15 0501505 Washer, Lock Int SST #8 (Not Shown) .............................................. 11

16 109651 Volute ................................................................................................. 1

17 113243 Impeller, 1.4HP SST ........................................................................... 1

18 109653 Gasket, O-ring .................................................................................... 1

19 111111 Pump Seal........................................................................................... 1

20 109649 Flange Assembly 1HP ........................................................................ 1

21 107690 Nut, Jam 3/8-16 .................................................................................. 4

22 106407 Washer, Lock 3/8" Split...................................................................... 4

23 109648 Backing Plate ..................................................................................... 1

24 109654 Pump Slinger Washer ......................................................................... 1

25 110734 Stud 3/8-16 x 1-3/8............................................................................. 4

26 111145 Motor 1.4HP (208-240V/460V/60/3 .................................................. 1

26 111144 Motor 1.4HP (115V/208-240V/60/1) ................................................. 1

26 112163 Motor 1.4HP (115V/208-240V/50/1) ................................................. 1

26 0507708 Motor 1.4HP (575V/60/3) .................................................................. 1

27 100739 Bolt 5/16-18 x 3/4 Hex Head ............................................................. 4

28 102376 Washer, Flat 5/16 ................................................................................ 4

29 106013 Washer, Lock 5/16-18 SST ................................................................ 4

30 100142 Nut, Grip 5/16-18 ............................................................................... 4

31 100754 Screw, Flat 10-32 x 1/2 ...................................................................... 4

32 110270 Washer, Countersunk SST .................................................................. 4

— 109645 Kit, Pump (Includes 16, 18, 20, 23, 24) ............................................. 1

— 451643 Pump, Motor Assembly

Complete 1.4HP (208-240V/460V/60/3PH) ...................................... 1

— 451642 Pump, Motor Assembly

Complete 1.4HP (115V/208-240V/60/1PH) ...................................... 1

— 0707549 Pump, Motor Assembly

Complete 1.4HP (575V/60/3PH) ....................................................... 1

59

REPLACEMENT PARTS

POWER

CYCLE

1

OFF

2

WASH

3

RINSE PRESSURE

6

5 7

EXTENDED

4

WASH

9

8

60

Figure 34 - MH-60/6N/6L

Control Panel and Gauges

REPLACEMENT PARTS

MH-60/6N/6L

CONTROL PANEL AND GAUGES

Fig. 34 Part
Item No. No. Part Description Qty.

1 0501361 Switch, On-Off ................................................................................... 1

2112390 Lite, Red (Power) ............................................................................... 1

3112391 Lite, Amber (In-Cycle) ....................................................................... 1

4 0501361 Switch, Extended Wash ...................................................................... 1

5113622 Thermometer, 4 Ft. Gas Filled (Replaces 108391) ............................ 1

6112086 Overlay, Wash 150°F (MH-60/6N) .................................................... 1

112093 Overlay, Wash 120°F (MH-6L Only) ................................................. 1

7 109812 Gauge, Pressure 0-100 PSI ................................................................ 1

8 109816 Overlay, 20-30 PSI ............................................................................. 1

9112388 Decal, Control Panel .......................................................................... 1

61

REPLACEMENT PARTS

17

6 7

16

Main Power Fuse Block

mounted on machine base

(115V/1 phase only)

5

15

4

3

13

14

Main Power Transformer

mounted on machine base

(208V-575V/1 or 3 phase)

2

8

62

RINSE

WASH

OUTPUT

OUTPUT

T3

POWER

F1

N

H

T1

T2

START SW.

LAMP

OUTPUT

OUTPUT

HEATERS

T5

T4

JB1

L1

JB3

T7

DOOR SW.

T6

JB2

U1

L3 L4

FILL RINSE WASH

L2

T8

T10

T9

FLOAT SW.

EXT. WASH

9 9

10

12

1

Figure 35 - MH-60/6N/6L

Control Cabinet

REPLACEMENT PARTS

MH-60/6N/6L

CONTROL CABINET

Fig. 35 Part
Item No. No. Part Description Qty.

1 900911 Kit* DM Board & Instructions .......................................................... 1

2 106925 Block, Fuse (30A, 3 Pole) .................................................................. 1

3 100913 Fuse, 10A (MH60) 208-240V/3 ......................................................... 3

3 100906 Fuse, 5A (ALL) 480V/3 ..................................................................... 3

3 105265 Fuse, 10A (ALL) 380-415V/3 ............................................................ 3

3 100906 Fuse, 5A (ALL) 575V/3 ..................................................................... 3

3 100929 Fuse, 30A (MH6L, 6N) 115V/1 ......................................................... 2

3 100922 Fuse, 20A (MH6L, 6N) 208V/1 ......................................................... 2

4 111904 Contactor, Booster Heater (40A, 3 Pole) (MH60 Only) .................... 1

5 111904 Contactor, Wash Tank Heater (40A, 3 Pole) (ALL) ........................... 1

5 111702 Contactor, Wash Tank Heater (50A, 3 Pole) (MH6N) ....................... 1

6 108122 Contactor, 1.4HP Wash Motor (12A, 3 Pole) (All Models) ............... 1

7110806 Starter Mtr, OL GV2-M10 w/Aux 1.4HP Wash

(MH60, MH6Ns) 208-240V/3 ........................................................... 1

7110804 Starter Mtr, OL GV2-M07 w/Aux 1.4HP Wash

(All Models) 480V/3 .......................................................................... 1

7110805 Starter Mtr, OL GV2-M08 w/Aux 1.4HP Wash

(All Models) 380-415V/3 ................................................................... 1

7112626 Overload, Motor 1.4HP Wash (All Models) 575V/3 ......................... 1

7 111632 Overload, Motor 1.4HP Wash (MH6L, 6N) 115V/1 .......................... 1

7 111632 Overload, Motor 1.4HP Wash (ALL) 208-240V/1 ............................ 1

8 107366 Board, Terminal .................................................................................. 1

9112382 Relay (3PDT, 10A, 120VAC Coil) ..................................................... 2

10 111068 Relay (2PDT, 10A, 120VAC Coil) ..................................................... 1

11 0509564 Label, Chemical Connections (Not Shown)....................................... 1

12 111833 Block, Terminal (3 Pole) (Main Power) ............................................. 1

13 109064 Transformer (208-240/1 & 3, 480/3).................................................. 1

13 111464 Transformer (380-415V/3PH) ............................................................ 1

13 111521 Transformer (575V/3PH) ................................................................... 1

14 112424 Kit, Fuse Block (2 Pole)

(208-240V/1-3PH, 380-415V/3PH, 480V/3PH, 575V/3PH) ............. 1

15 112484 Fuse, 1.5A, 600V (ATDR) 208-240V/1-3PH ..................................... 2

15 112888 Fuse, 1.8A, 600V (ATDR) 380-415V/3PH ........................................ 2

15 112887 Fuse, .5A, 600V (ATDR) 480V/3PH ................................................. 2

15 112887 Fuse, .5A, 600V (ATDR) 575V/3PH ................................................. 2

16 106402 Block, Fuse (2 Pole) (115V Only)...................................................... 1

17 107289 Fuse, 2.5A, 250V (ATDR) 115V Only............................................... 2

— 103310 Wire Lug, Ground (Not Shown)......................................................... 1

63

REPLACEMENT PARTS

1

2

3

64

Figure 36 -

Dishracks and PRV

REPLACEMENT PARTS

DISHRACKS AND PRV

Fig. 36 Part Part Description
Item No. No. Qty.

1 101273 Rack (Flat Bottom) ............................................................................. 1

2 101285 Rack (Peg) .......................................................................................... 1

3112387 Line Strainer/PRV Combo .................................................................. 1

65

APPENDIXES

THIS PAGE

INTENTIONALLY

LEFT BLANK

66

APPENDIXES

APPENDIXES

67

APPENDIXES

INSTRUCTION SHEET

Moyer Diebel
USA
Tel: [phone]
Fax: [phone]
Tel: [phone]

Moyer Diebel, Ltd.
Canada
Tel: [phone]
Fax: [phone]
Tel: [phone]

Prepare for Conversion

Refer to the parts list at right and make

1

sure the kit is complete.

OPTIONAL TOOL:
(Qty. 2) 17-3/4" [451mm] 2" x 4" wood

block to support front and right door.

2

Make sure dishwasher completes
any unfinished cycles. Turn machine
power off and turn power off at the main
disconnect switch.

!

Warning!

Disconnect power at the main discon­nect switch and place a tag at the
disconnect switch to indicate work is
being performed on the machine.

Straight to Corner (Door Conversion Kit) P/N 900794

The instructions below illustrate the conversion of a Champion or
Moyer Diebel door-type dishwasher from straight-through to corner
operation.

Affected Models:
Beginning with MH-60, MH-6N, MH-6L
S/N D1054 and above

Conversion Kit Parts List Kit # 900794

Item Part Qty.

No. No. Description

1 0309471 Track, front 1

2 0309469 Track, rack guide 1

3 0309468 Track, rack guide 1

4 0309470 Track, rack support 1

5 107966 Nut, grip 10-32 w/nylon insert) 6

6 106727 Screw (10-32 x 5/8" Flat Hd.) 6

7 323224 Bracket, door lift 1

8112723 Bolt, spring (5/16-18 x 15") 2

9 104889 Putty, sealing 1 ft.

!

Warning!

Machine surfaces are hot, especially
during and after machine operation.

3

Drain the dishwasher and allow hot
surfaces to cool.

4

Refer to Fig. 1 at right. Note the
orientation of the machine for corner
installation. Note the controls must
be accessible from the front.
Plan your relocation accordingly.

5

Raise the doors completely. Block the
front and right side door with the wood
blocks described in step 1.
If you do not have a blocking tool,
have a helper stand by to support
the doors.

(Continued on back)

WALL

WALL

5-1/4"[133mm] MIN.

Figure 1-

Machine Orientation for Corner Operation

5-1/4"[133mm] MIN.

FRONT

POWER SWITCH
(MH Series)

Controls easily
accessible
from the front

68

Change the Tracks

Refer to Fig.2.

Remove existing front track, save

6

mounting hardware.

7

Install Item 1, from kit using existing
mtg. hardware. Seal bolts with putty
supplied in kit.

8

Install Items 2-6 from kit.

APPENDIXES

6

5

2

1

FRONT

4

3

Change the Door Lift Bracket

Refer to Fig.3.

Raise the doors completely. Block

9

the front and right side door with the
wood block described in step 1.
If you do not have blocking tools,
have a helper support the doors.

Remove the mounting hardware

10

holding the existing door lift bracket.
Remove the bracket and discard.

11

Install Item 7 using existing
hardware. Be sure to reinstall bolts
in right side door to plug holes.

12

Remove lift bar and associated
hardware connecting door handle
and right side door.

13

Carefully remove wood block sup­porting right side door and close
door.

Change the Extension Bolts

Refer to Fig.4.

Existing track
(Remove and discard)

Figure 2 - Change the Tracks

Existing bracket
(Remove and discard)

Figure 3 - Change the Door Lift Bracket

Existing
hardware

Existing
door linkage
(Remove
and discard)

7

Make sure wood blocks or helper

14

supports opened front and left
doors.

15

Remove existing extension bolts.
Remove door springs.
Install (qty. 2) Item 8 from kit in
reverse order.

16

Adjust door spring tension for
smooth door operation. Doors
should provide 17-3/4" [451mm]
clearance when fully raised.

8

8

Figure 4- Change the Extension Bolts

69

APPENDIXES

INSTRUCTION SHEET

Moyer Diebel
USA
Tel: [phone]
Fax: [phone]
Tel: [phone]

Moyer Diebel, Ltd.
Canada
Tel: [phone]
Fax: [phone]
Tel: [phone]

Prepare for Conversion

Refer to the parts list at right and make

1

sure the kit is complete.

OPTIONAL TOOL:
(Qty. 2) 17-3/4" [451mm] 2" x 4" wood

block to support front and right door.

2

Make sure dishwasher completes
any unfinished cycles. Turn machine
power off and turn power off at the main
disconnect switch.

!

Warning!

Disconnect power at the main discon­nect switch and place a tag at the
disconnect switch to indicate work is
being performed on the machine.

Corner to straight (Door Conversion Kit) P/N 900796

The instructions below illustrate the conversion of a Moyer Diebel
door-type dishwasher from corner to straight-through operation.

Affected Models:
Beginning with MH-60, MH-6N, MH-6L
S/N D1054 and above

Conversion Kit Parts List Kit # 900796

Item Part

No. No. Description Qty.

1 0309472 Track, front 1
2 0709405 Door, right side 1
3 0309277 Bracket, door lift 1
4 0509166 Handle, door1
5 0508864 Grip, handle (blue) 2
6 0309167 Bar, door lift 1
7 0509264 Bushing, side door 1
8 104002 Bolt (5/16-18 x 1-1/2") 1

9 109009 Nut, grip 5/16-18 w/nylon insert 1
10 102376 Washer 2
11 100740 Bolt (5/16-18 x 1" 1
12 100142-T Nut, Grip (5/16-18 w/Toplock) 1
13 104889 Putty, sealing1 ft.

!

Warning!

Machine surfaces are hot, especially
during and after machine operation.

3

Drain the dishwasher, open doors fully
and allow hot surfaces to cool.

Change the Tracks

Refer to Fig. 1.

Remove existing tracks, save

4

mounting hardware.
DO NOT REMOVE REAR TRACK.

Install Item 1, from kit using existing

5

mtg. hardware. Seal bolts with putty
supplied in kit.

70

FRONT

1

EXISTING
TRACKS
(Remove
and Discard)

Figure 1-

Change the Tracks

DO NOT REMOVE
REAR TRACK

Existing
hardware

APPENDIXES

Change Door and
Door Lift Bracket

Refer to Fig. 2.

6

Raise the doors completely. Block
the front and right side door with the
wood blocks described in step 1,
If you do not have blocking tools,
have a helper support the doors.

Remove the mounting hardware

7

holding the existing door lift bracket.
Remove the bracket and discard.

Remove right side door stop located

8

upper front right corner.

Remove right side door and replace

9

with Door, Item 2, from kit.

Install Lift bracket,Item 3, from kit.

10

Reinstall door stop removed in step 9.

Existing
door
(Remove
and discard)

2

Remove
door stop

3

Existing bracket
(Remove and discard)

Figure 2 - Change Door and Door Lift Bracket

Change the Door Handle

Refer to Fig. 3.

Make sure wood blocks or helper

11

support opened front and right side
doors.

.Remove door springs and upper

12

pivot blocks from door handle.
Remove left side door lift bar assy.
Replace existing door handle with
Item 3 and 4 from kit.
Reassemble in reverse order.

Install the Door Lift Bar Assy.

Refer to Fig. 4.

Install the door lift bar assy.,

13

Items 5-11, on the right side door.

Make sure the Toplock 5/16-18 nut
is installed on the bottom inside of the
machine.

Figure 3 - Change the Door Handle

Right Side Door

Nut, toplock

12

4

5

8

10

6

10

9

Adjust door spring tension for

14

smooth door operation. Doors
should provide 17-3/4" [451mm]
clearance when fully raised.

11

7

Figure 4 - Install the Door Lift Bar Assembly

71

APPENDIXES

ELECTRICAL SCHEMATICS

THIS PAGE

INTENTIONALLY

LEFT BLANK

72

ELECTRICAL SCHEMATICS

APPENDIXES

ELECTRICAL

SCHEMATICS

73

L1 L2 L3

ON SINGLE PHASE
MACHINES OMIT L3.

L1
L2
50

L1
L2
L3

1MOL

50

24

25

24
25
26

1M

1M1MOL

ELECTRIC TANK HEAT IF USED

FUH HC1

L1

L2

FUH HC1

L1

L2

L3

FUH

L1

L2

L3

ELECTRIC BOOSTER HEAT IF USED (SEE NOTE3)

30 33

31

34

30 33

31

32

HC1

30 33

31

32

BC1

L1 36

L2

BC1

L1

L2

L3

BC1

L1

L2

34

35

34

35

37

36

37

38

36

37

38L3

27

28

27
28
29

3kW

3kW

3kW

1MTR

1MTR

PER LOCAL ELECTRICAL CODE

L1 L2 L3

L1

L2

L3

FUT FUT

4039

T1

12

SEE NOTE 2

4

DS1

4

GND

ON SINGLE PHASE
MACHINES OMIT L3.

NOT USED
WITH 115V LINE
SUPPLY
SEE NOTE 1

5

DS2

1CRA

EW

1M

NOTE 1: IF SUPPLY IS 115V T1 IS
NOT USED. WIRES #1 AND #2 ARE
CONNECTED TO THE FUSE
BLOCK IN PLACE OF 39 AND 40.

NOTE 2: USED ON INDEPENDENT
FRONT DOOR MACHINES.

NOTE 3: THE kW RATING OF THE ELEMENT IS DEPENDENT UPON
THE DEGREE RISE OF THE SYSTEM. SINGLE PHASE MACHINES
WITH BOOSTERS ARE 40˚ RISE ONLY AND REQUIRE 9kW
ELEMENTS. A 40˚ RISE THREE PHASE SYSTEM REQUIRES A 9kW
ELEMENT. A 70˚ RISE THREE PHASE SYSTEM REQUIRES AN 18kW
ELEMENT.

6

1CR

OUTPUT

OUTPUT

HEATERS

OUTPUT

OUTPUT

FSW

2CRA

11

10

T2

2

T1

START

SWITCH

T7

9

DOOR

SWITCH

T8

FLOAT

SWITCH

T9

EXTENDED

WASH

T10

F1

1A 5x20 mm Fast Acting

JB1 - OPEN

JB2 - OPEN

JB3 - CLOSED

23

41

120V FAN SIGNAL

TO CONTACTOR COIL

SUPPLIED BY OTHERS

43

IF USED

WASH

T3

RINSE

T4

T5

LAMP

T6

MPS

ON OFF

4

12

15

1CRB

1CRC

13

16

TSHC

17 19

ELECTRIC HEAT ONLY

TSBC

22

1M

RWV

BCHL

RINSE

SIGNAL

DETERG.

SIGNAL

12

LT1

1MOL

14

2CR

HC1

BC1

2

2120

(IF USED)

LT1

2

DOOR SWITCH RELAY1CR

2CR RINSE AID SIGNAL RELAY

WASH MOTOR CONTACTOR1M

WASH MOTOR OVERLOAD1MOL
1MTR WASH MOTOR
BC1

BOOSTER TANK CONTACTOR OR STEAM VALVE

BOOSTER TANK HIGH LIMITBCHL

DOOR SAFETY SWITCH, FRONT DOORDS1

DOOR SAFETY SWITCH, SIDE DOORSDS2
EW EXTENDED WASH SWITCH

TIMER BOARD FUSEF1

FLOAT SWITCHFSW

TANK HEAT FUSESFUH

TRANSFORMER FUSESFUT
HC1

TANK HEAT CONTACTOR OR STEAM VALVE

TANK HEAT HIGH LIMITHCHL

RINSE TIME SELECT JUMPERJB1

CYCLE SELECT JUMPERJB2

CYCLE SELECT JUMPERJB3

POWER ON LIGHTLT1

CYCLE LIGHTLT2

MAIN POWER SWITCHMPS

RINSE WATER VALVERWV

LINE:120V TRANSFORMERT1

BOOSTER TANK THERMOSTATTSBC
TSHC WASH TANK THERMOSTAT

TO TEST INPUTS T7, T8, T9, AND T10 A METER CAPABLE
OF READING DC VOLTAGES MUST BE USED.

1.) SET METER TO READ DC VOLTAGE

2.) PLACE BLACK LEAD TO T2

3.) PLACE RED LEAD TO TERMINAL BEING TESTED

i.e. PLACE RED LEAD TO T8 TO TEST DOOR SW.

4.) AN OPEN SWITCH WILL READ 4.7-5.3VDC

A CLOSED SWITCH WILL READ 0-1VDC

RELAY

NORMALLY CLOSED

4

518

13 14

NORMALLY OPEN

COMMON

129

COIL

DIAGRAM STATE

POWER OFF
DOORS CLOSED
TANKS EMPTY
END OF CYCLE

CUSTOMER TO SUPPLY RATED VOLTAGE/PHASE/Hz,
AS SPECIFIED PER ORDER,TO DISCONNECT SWITCH.
ALL POWER SUPPLIED TO EACH CONNECTION POINT
MUST COMPLY WITH ALL LOCAL ELECTRIC CODES.

J.NEWTON

DATE SHEET

20MAY99

SCALEDR.BY

1

NONE

OF

DESCRIPTIONREV.

A JCN

REMOVED UNUSED LEGEND REFERENCES
ADDED TROUBLESHOOTING REFERENCESB

1

REDRAWN MAIN POWER SWITCHC

DATE

15OCT99
4NOV99
7MAR00

BY

JCN
JCN

REV. DESCRIPTION

D

REVISED SINGLE PHASE MOTOR OVERLOAD AND TANK HEAT HI LIMIT

DATE

9AUG00

JCN

BY

The Dishwashing Machine Specialists

MH-6/0/L/N-E ELECTRONIC CONTROL
STEAM/ELECTRIC - 1 & 3 PHASE

REV.

B

701602 D