Moyer Diebel MH-6LM5, MH-60M5, MH-6NM5 User Manual

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Page 1

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

Moyer Diebel

Model MH-60M5

High Temperature with Built-in Booster

MH-6NM5 High Temperature

MH-6LM5 Low Temper atur e

Machine Serial No.

March, 2004

Technical Manual

Door-Type Dishwasher

Manual P/N 113494 Rev E

2674 N. Service Road Jordan Station, Ontario, Canada L0R 1S0 905/562-4195 Fax:905/562-4618

For machines beginning with serial no. D3694 and above

Page 2

Machine

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

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: 1(336) 661-1992

1(800) 228-8350

Fax: 1(336) 661-1660 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.

Moyer Diebel, Limited

Phone: 1(905) 562-4195

1(800) 263-5798

Fax: 1(905) 562-4618

Page 3

Revision History

REVISIONS

Revision Revised Serial Number Comments

Date Pages Effectivity

07/01/02 All D3694 Issue of New Service Manual and

replacement parts list 10/18/02 3 D3858 Revised rated amps listing 10/18/02 13, 17, 24 D3858 Revised cycle times 10/18/02 42,43 D3858 Revised rinse arm bearings and

assemblies numbers. Bearing 112164

replaced by 113514, 0707453 &

0708899 replaced by 414111. 10/18/02 37 D3858 Inserted new rinse arm assemblies 414110

(MH-60 & MH-6N) and 414111 (MH-6L) 10/18/02 53, 56 D3700 Inserted new bushing P/N 100171 10/24/02 63 D3858 Inserted new timer board for MH-60

and MH-6N P/N 113547 12/18/02 63 D3858 Inserted new timer control board kit.

P/N 900911 to convert all timer boards

to 113597. 2/5/03 47, 61 — Replace 108391 with 113622 thermometer. 2/5/03 63 Replaced Furnace (Siemens) overloads

with Telemecanique (Square D) overloads. 7/22/03 49 D3982 Replaced 110562 ith 113604. 7/22/03 53,57 –– Revised plastic style vacuum breakers with

bronze style. 7/22/03 61 –– Replaced P/N 112086 with 113622. 2/3/04 50-51 D4237 Insert new drawing and add seperate pressure

reducing valve 107550 and line strainer 110768. 2/3/04 33 –– Corrected side door part number 325409 to

325405.

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CONTENTS

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

ELECTRICAL SCHEMATICS ......................................................................................................67

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

CONTENTS

Page 5

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 Assembl y ........................................................................................ 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

ELECTRICAL SCHEMATICS

B701602/H – Wiring Diagrams (MH-60, MH-6N, MH-6L Steam/Electric 1 & 3 Phase)............67

CONTENTS

iii

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INTENTIONALLY

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Page 7

LIMITED W ARRANTY

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 T O 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/MO YER DIEBEL PARTS,AND ALL O THER 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

WARRANTY

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INTENTIONALLY

LEFT BLANK

Page 9

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 Cleaing Instructions

• Troubleshooting Guide

• Basic Service Information

• Replacement Parts Lists

• Electrical Schematics

All information, illustrations and specif ications 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 par ts 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 par ts, please supply the model number, serial number, voltage, and phase of your machine, the part number, part descriptions and quantity.

Page 10

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 two 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

• Stainless steel rinse arms with cleanout

Page 11

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 — 46 Amps 60 Amps 86 Amps MH-6N/MH-6L 208/60/1 — 35 Amps 40 Amps 40 Amps MH-6N/MH-6L 220/60/1 — 35 Amps 40 Amps 40 Amps MH-6N/MH-6L 230/60/1 — 37 Amps 40 Amps 40 Amps MH-6N/MH-6L 240/60/1 — 37 Amps 40 Amps 40 Amps MH-6N/MH-6L 208/60/3 — 20 Amps 25 Amps 25 Amps MH-6N/MH-6L 220/60/3 — 20 Amps 25 Amps 25 Amps MH-6N/MH-6L 230/60/3 — 21 Amps 25 Amps 25 Amps MH-6N/MH-6L 240/60/3 — 21 Amps 20 Amps 25 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 — 9 Amps 15 Amps 15 Amps MH-6N/MH-6L 575/60/3 — 7 Amps 15 Amps 15 Amps MH-60 115/60/1 — — — — MH-60 208/60/1 40°F/23°C 71 Amps 75 Amps 75 Amps MH-60 220/60/1 40°F/23°C 71 Amps 75 Amps 75 Amps MH-60 230/60/1 40°F/23°C 79 Amps 90 Amps 90 Amps MH-60 240/60/1 40°F/23°C 79 Amps 90 Amps 90 Amps MH-60 208/60/3 40°F/23°C 40 Amps 45 Amps 45 Amps MH-60 220/60/3 40°F/23°C 40 Amps 45 Amps 45 Amps MH-60 230/60/3 40°F/23°C 45 Amps 50 Amps 50 Amps MH-60 240/60/3 40°F/23°C 45 Amps 50 Amps 50 Amps MH-60 380/60/3 40°F/23°C 26 Amps 30 Amps 30 Amps MH-60 415/60/3 40°F/23°C 27 Amps 30 Amps 30 Amps MH-60 480/60/3 40°F/23°C 20 Amps 25 Amps 25 Amps MH-60 575/60/3 40°F/23°C 16 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 57 Amps 60 Amps 60 Amps MH-60 220/60/3 70°F/39°C 57 Amps 60 Amps 60 Amps MH-60 230/60/3 70°F/39°C 64 Amps 70 Amps 70 Amps MH-60 240/60/3 70°F/39°C 64 Amps 70 Amps 70 Amps MH-60 380/60/3 70°F/39°C 35 Amps 40 Amps 40 Amps MH-60 415/60/3 70°F/39°C 37 Amps 45 Amps 45 Amps MH-60 480/60/3 70°F/39°C 29 Amps 35 Amps 35 Amps MH-60 575/60/3 70°F/39°C 25 Amps 30 Amps 30 Amps

Electrical Po wer Requirements:Fig Steam or Gas Heat/Steam or Gas Booster

Model Voltage Booster Rise Rated Minimum Supply Ckt. Maximum Overcurrent

(D-HBT Only) Amps Conductor Ampacity Protective Device

MH-6N/MH-6L 115/60/1 — 20 Amps 25 Amps 25 Amps MH-6N/MH-6L 208/60/1 — 12 Amps 15 Amps 15 Amps MH-6N/MH-6L 220/60/1 — 12 Amps 15 Amps 15 Amps MH-6N/MH-6L 230/60/1 — 11 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 13 Amps 15 Amps 5 Amps MH-60 220/60/1 40°F/23°C 13 Amps 15 Amps 15 Amps MH-60 230/60/1 40°F/23°C 12 Amps 15 Amps 15 Amps MH-60 240/60/1 40°F/23°C 12 Amps 15 Amps 15 Amps MH-60 208/60/3 40°F/23°C 6 Amps 15 Amps 15 Amps MH-60 220/60/3 40°F/23°C 6 Amps 15 Amps 15 Amps MH-60 230/60/3 40°F/23°C 6 Amps 15 Amps 15 Amps MH-60 240/60/3 40°F/23°C 6 Amps 15 Amps 15 Amps MH-60 380/60/3 40°F/23°C 4 Amps 15 Amps 15 Amps MH-60 415/60/3 40°F/23°C 4 Amps 15 Amps 15 Amps MH-60 480/60/3 40°F/23°C 3 Amps 15 Amps 15 Amps MH-60 575/60/3 40°F/23°C 3 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°C 6 Amps 15 Amps 15 Amps MH-60 220/60/3 70°F/39°C 6 Amps 15 Amps 15 Amps MH-60 230/60/3 70°F/39°C 6 Amps 15 Amps 15 Amps MH-60 240/60/3 70°F/39°C 6 Amps 15 Amps 15 Amps MH-60 380/60/3 70°F/39°C 4 Amps 15 Amps 15 Amps MH-60 415/60/3 70°F/39°C 4 Amps 15 Amps 15 Amps MH-60 480/60/3 70°F/39°C 3 Amps 15 Amps 15 Amps MH-60 575/60/3 70°F/39°C 3 Amps 15 Amps 15 Amps

Page 12

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 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 factor y as a straight-through configuration or as a corner conf iguration. Your machine can be converted from straight-through to corner or from corner to straight-through. Contact the factory for instr uctions on changing the operation of your dishwasher.

POWER

FILL

CYCLE

EXTENDED

WASH

RINSE

WASH

WARNING!

TURN OFF POWER BEFORE

SERVICING MACHINE

Page 13

INSTALLATION

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.

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

Electrical knock-out lower rear corner

Page 14

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.

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.

INSTALLATION

Figure 3

Hinged Control Panel

Figure 4

Main T erminal Block

Electrical Power Connection

Page 15

INSTALLATION

Figure 5

Hot W ater Connection

(MH-60 Only)

3/4" NPT

Figure 8

Hot W ater Connection

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

3/4" NPT

INSTALLATION (Cont.)

Plumbing Connections

NOTE:

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

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°C140°F/60°C Optimum) (Min./Max. flow pressure 20-22 PSI/138-151.8 kPa)

Refer to Figs. 5 and 6

12"

[305mm]

FLOOR

12"

[305mm]

FLOOR

Page 16

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.

Figure 7

Drain Hose Connection

1-1/2" O.D.

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

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

Page 17

RINSE

INSTALLATION

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.

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.

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

Figure 8

Chemical Dispenser

Signal

Terminal Block

Figure 9

Chemical Signal

Connection Points

Common Return

Detergent Signal Connection Point 1 Amp Max Load/115VAC

Page 18

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. The manifold is located on the top right

side of the dishwasher.

8. MH-6L Onl

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.

Figure 10

Detergent Probe

Injection Points, 1/2"

Figure 11

Rinse Aid and

Sanitizer Injection Points

(Top of Dishwasher)

MH-60, 6N

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

1/8" NPT sanitizer injection point Model MH6L Only

Page 19

INITIAL START-UP

Install the Scrap Screens and Drain-Overflow Assembly

Install scrap screens. Make sure rubber stopper is secure on the drain-overflow assembly.

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

MAKE SURE DOORS ARE FULLY CLOSED.

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

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.

WASH

EXTENDED

WASH

CYCLE

POWER

OFF

RINSE PRESSURE

Page 20

INITIAL START-UP

Check W ash Water T emperature

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.

Note that the power indicator light is illuminated.

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.

INITIAL START-UP (CONT.)

POWER

OFF

POWER

OFF

WASH

CYCLE

EXTENDED

CYCLE

RINSE PRESSURE

EXTENDED

RINSE PRESSURE

WASH

POWER

OFF

WASH

EXTENDED

CYCLE

RINSE PRESSURE

WASH

Page 21

INITIAL START-UP

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: Wash = 48 seconds

Dwell = 4 second Final rinse = 8 seconds

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

INITIAL START-UP (CONT.)

POWER

OFF

WASH

EXTENDED

CYCLE

RINSE PRESSURE

WASH

Page 22

INITIAL START-UP

Check Final Rinse Water T emperature

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.

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.

INITIAL START-UP (CONT.)

250

200

150

100

POWER

OFF

WASH

EXTENDED

CYCLE

RINSE PRESSURE

WASH

Page 23

INITIAL START-UP

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.

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.

INITIAL START-UP (CONT.)

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.

WASH

EXTENDED

WASH

CYCLE

POWER

OFF

RINSE PRESSURE

Page 24

INITIAL START-UP

Drain the dishwasher (Cont.)

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

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.

INITIAL START-UP (Cont.)

Page 25

OPERATION SUMMARY

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 8 second final rinse cycle.

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.

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 = 48 seconds Dwell = 4 seconds Final rinse = 8 seconds

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

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.

OPERATION

Action Result

Page 26

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.

Page 27

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.

Page 28

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 f illed 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

Page 29

TROUBLESHOOTING

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 f inal 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

TROUBLESHOOTING (CONT.)

Page 30

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:

Moyer Diebel National Service

USA: 1-800-858-4477 Canada: 1-800-263-5798

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).

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.

Page 31

BASIC SERVICE

Electrical Service (Cont.)

Fuses —

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.

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

Figure 12

Wash tank heater fuses

Control Cabinet

Switch Lever

Page 32

BASIC SERVICE

Solid State MH60/MH6N/MH6L 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 = 48 secs.

Dwell = 4 secs. Rinse = 8 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.

Special T ools

• 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 tur n 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:

Page 33

BASIC SERVICE

Troubleshooting Timer Circuit Board (cont.)

Power T erminals

• 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 verif ied 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.

Page 34

1.4 Testing Board Outputs

After you have verif ied 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.

Figure 14

Solid State

Control Board

BASIC SERVICE

START SW.

DOOR SW.

FLOAT SW.

EXT. WASH

T10

JB3

FILL RINSE WASH

L3 L4

POWER

JB1

JB2

WASH

OUTPUT

RINSE

OUTPUT

HEATERS

OUTPUT

LAMP

OUTPUT

Page 35

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 f ill 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 f ill cycle, then the machine will cycle again. When the float switch is satisfied, the fill cycle stops after completing its 110-second cycle.

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

System Checks

YES

Wash

Tank Fills Constantly

Is Tank Full

of Water?

Is the Float

Ball Up?

Check

Drain

Clean

Float Assy

Is Heat ON

when called

for?

Replace

Float

Check

Solenoid

Valve

Figure 16

Float Switch

Troubleshooting Chart

Figure 15

Float Switch

Page 36

BASIC SERVICE

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

1L2

1L1

1L2

1L3

1L1

1L2

1L3

1L1

1L2

1L3

1L1

1L2

1L1

1L2

1L3

1L1

1L2

1L3

1L1

1L2

1L3

1L1

1L2

1L1

1L2

1L3

1L1

1L2

1L3

1L1

1L2

1L3

1L1

1L2

1L1

1L2

1L3

1L1

1L2

1L3

1L1

1L2

1L3

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

Configuration D

Wash tank element View of calrod coils

Terminal Connections View of element

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

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

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

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

Figure 17

Heater Element Wiring

Page 37

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

LINE

SINGLE PHASE - HIGH VOLTAGE

LINE

Figure 18

Pump Motor Wiring Diagrams

208-240V

THREE PHASE - LOW

VOLTAGE

480V

THREE PHASE - HIGH

VOLTAGE

575V ONLY

THREE PHASE

654

987

321

LINE

654

987

321

LINE

321

LINE

Page 38

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 r ubber 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 par t of the seal on the shaft with the graphite surf ace toward the ceram-

ic. 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.

Figure 19

Pump Seal Replacement

Water Slinger

Backing Plate

Pump Flange

Seal Assy.

Backing Plate

Mtg. Nut

Impeller

Washer

Nut

Gaskets

Bolt

(B)

Bolt

(A)

Volute

Plug

Page 39

REPLACEMENT PARTS

REPLACEMENT

PARTS

Page 40

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

Doors and Panels

REPLACEMENT PARTS

Page 41

REPLACEMENT PARTS

MH-60/6N/6L

DOORS AND P ANELS

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

1 325405 Side Door ...................................................................................... 2

2 327131 Front Door...................................................................................... 1

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

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

5 112389 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

Page 42

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

Door Guides, Stops, and Lift Bracket

REPLACEMENT PARTS

FRONT OF HOOD

Page 43

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 327104 Bracket, Door Lift .............................................................................. 1

4 100007 Screw 10-32 x 3/8" Truss Head.......................................................... 4

5 327103 Door Lift Bracket................................................................................ 1

6 100097 Scew 10-32 x 1/2" Truss Head .......................................................... 2

7 108347 Guide, Door ........................................................................................ 6

8 108410 Gasket, Door Guide (26") .................................................................. 12

9 107970 Screw 8-32 x 1 Filister........................................................................ 36

10 317345 Bracket, Door catch .......................................................................... 1

11 325921 Door Catch.......................................................................................... 1

12 100073 Screw 1/4-20 x 1/2"............................................................................ 2

13 100141 Nut, Grip 1/4-20.................................................................................. 2

14 108966 Door Handle........................................................................................ 1

Page 44

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

Door Handle, Spring Assembly, and Safety Switch

REPLACEMENT PARTS

28 30

Page 45

REPLACEMENT PARTS

MH-60/6N/6L

DOOR HANDLE, SPRING ASSEMBLY,AND SAFETY SWITCH

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

1 112723 Bolt 5/16-18 x 15 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 Inser t ........................................................ 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

Page 46

Figure 23A – MH-60/6N/6L

Straight T rack Assemb ly

Figure 23B – MH-60/6N/6L

Corner T rack Assemb ly

REPLACEMENT PARTS

Page 47

REPLACEMENT PARTS

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 Suppor t, 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

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

Page 48

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

Wash/Rinse Spray Piping

REPLACEMENT PARTS

FRONT

LEFT SIDE

Page 49

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

2 113027 Connector, Rinse Arm ........................................................................ 2

3 113028 Top Rinse Arm Connector.................................................................. 2

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

5 109864 Support, W ash 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

Page 50

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

Wash/Rinse Spray Arms

REPLACEMENT PARTS

AFTER S/N D3858

PRIOR TO S/N D3857

Page 51

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) (Prior to S/N D3857) .. 12

3 113514 Bearing, Rinse Arm (Replaces 112164) ............................................ 4

*4 414111 Rinse Arm Assy. (Complete) (MH-60, MH-6N Prior to S/N D3857) 2

4 414110 Rinse Arm Assy . (Complete)

(MH-60, MH-6N only) (After S/N D3858)........................................ 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)

(Prior to S/N D3857) .......................................................................... 12

*10 414111 Rinse Arm Assy. (MH-6L only) (Complete) (Prior to D3857) .......... 1

10 414111 Rinse Arm Assy. (MH-6L only) (Complete) (After S/N D3858) ...... 1

* Part number 0707453 (MH-60, MH6N) and 0708899 (MH-6L) are no longer

available as complete rinse arm assemblies. Replacement nozzles and bearings are still available for these assemblies. To replace the complete rinse arm assembly, order part number 414111.

Page 52

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

Drain Assembly and Scrap Screens

REPLACEMENT PARTS

Page 53

REPLACEMENT PARTS

MH-60/6N/6L

DRAIN ASSEMBLY AND SCRAP SCREENS

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

1 112393 Knob, Drain Lift ................................................................................ 1

2 112394 Rod Assy., Drain Lift .......................................................................... 1

3 112392 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 W asher, T ailpiece................................................................................ 1

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

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

Page 54

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

Wash Tank Heat and Thermostats

REPLACEMENT PARTS

Thermostat bracket detail

Page 55

REPLACEMENT PARTS

MH-60/6N/6L

WASH TANK HEA T AND THERMOSTATS

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

1 113622 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

6 110561 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

113479 Heater 4.7KW 208-240/380-415V 1/3PH.......................................... 1

113480 Heater 4.7KW 460V/3PH .................................................................. 1

113481 Heater 4.7KW 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

Page 56

Figure 28- MH-60 Only

Electric Booster and Thermostats

REPLACEMENT PARTS

TO UPPER PIPING

FROM FILL VALVE

Page 57

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

4 113604 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 111233 Heater 7.5KW 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

Page 58

Figure 29 - MH-60 Only

Lower Fill Piping Assembly

REPLACEMENT PARTS

CUSTOMER

WATER

INLET

TO UPPER

PIPING

Page 59

REPLACEMENT PARTS

MH-60 ONLY

LOWER FILL PIPING ASSEMBLY

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

1 107550 Valve, Pressure Reducing 3/4"............................................................ 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

9 112437 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

23 110768 Strainer, Line 3/4" brass .................................................................... 1

Page 60

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

REPLACEMENT PARTS

WATER IN FROM

LOWER PIPING

Page 61

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 (Prior to S/N D3699) ...... 2

3 100171 Bush Red Face 3/4" x 1/2" Brass (After S/N D3700) ........................ 1

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" .......................................................................... 1

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

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

12 0309426 Piping Suppor t 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) .................................. 1

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

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

18 102392 Bushing Reducing 3/4" x 1/2" NPT Brass (After S/N D3700) .......... 1

* Use kit 900837 to repair either style (plastic or bronze) vacuum breakers.

Page 62

Figure 31 - MH-6N/6L Only

Lower Fill Piping Assembly

REPLACEMENT PARTS

CUSTOMER

WATER IN

TO UPPER

PIPING

Page 63

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, Suppor t Bracket ................................................................ 1

3 110768 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

Page 64

Figure 32 - MH-6L Only

Upper Fill Piping Assembly

REPLACEMENT PARTS

WATER IN FROM

LOWER PIPING

Page 65

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

(Prior to S/N D3699) .... 2

3 100171 Bush Red Face 3/4" x 1/2" Brass (After S/N D3700) ........................ 1

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 ................................................................ 1

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

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

12 0309426 Plumbing Suppor t 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

19 102392 Bushing Reducing 3/4" NPT x 1/2" NPT Brass (After S/N D3700) 1

* Use kit 900837 to repair either style (plastic or bronze) vacuum breaker.

Page 66

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

Pump Assembly

REPLACEMENT PARTS

Page 67

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

6 112383 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) (Not Shown).......................................................... 11

15 0501505 Washer, Lock Int SST #8.................................................................... 11

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

17 113248 Impeller, 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

Page 68

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

Control Panel and Gauges

REPLACEMENT PARTS

POWER

CYCLE

OFF

WASH

RINSE PRESSURE

5 7

EXTENDED

WASH

Page 69

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

2 112390 Lite, Red (Power)................................................................................ 1

3 112391 Lite, Amber (In-Cycle) ...................................................................... 1

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

5 113622 Thermometer, 4 Ft Gas Filled (Replaces 108391) ............................ 1

6 113662 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

9 112388 Decal, Control Panel .......................................................................... 1

Page 70

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

Control Cabinet

Main Power Fuse Block

mounted on machine base

(115V/1 phase only)

Main Power Transformer

mounted on machine base

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

REPLACEMENT PARTS

6 7

RINSE

WASH

OUTPUT

POWER

START SW.

LAMP

OUTPUT

HEATERS

JB1

JB3

DOOR SW.

JB2

L3 L4

FILL RINSE WASH

T10

FLOAT SW.

EXT. WASH

9 9

Page 71

REPLACEMENT PARTS

MH-60/6N/6L

CONTROL CABINET

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

1 900911 Kit* DM Board & Instructions (Prior to S/N D3857)........................ 1

113597 Timer Board (MH-60, MH-6N only) (After S/N D3858).................. 1

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

3 100922 Fuse, 20A (MH60) 208-240V/3 ........................................................ 3

3 100913 Fuse, 10A (ALL) 480V/3 .................................................................. 3

3 100913 Fuse, 10A (ALL) 380-415V/3............................................................ 3

3 100913 Fuse, 10A (ALL) 575V/3 .................................................................. 3

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

3 100929 Fuse, 30A (MH6L, 6N) 208V/1 ........................................................ 2

4 111924 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

7 110806 1.4HP Wash (MH60, MH6Ns) 208-240V/3

Starter, Mtr OL GV2-M10 w/Aux...................................................... 1

7 110804 1.4HP Wash (All Models) 480V/,3

Starter, Mtr OL GV2-M08 w/Aux...................................................... 1

7 110805 1.4HP Wash (All Models) 380-415V/3

Starter, Mtr OL GV2-M08 w/Aux...................................................... 1

7 112626 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

9 112382 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, Ter minal (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

Page 72

Figure 36 -

Dishracks and PRV

REPLACEMENT PARTS

Page 73

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

3 112387 Line Strainer/PRV Combo.................................................................. 1

Page 74

THIS PAGE

INTENTIONALLY

LEFT BLANK

Page 75

ELECTRICAL

SCHEMATICS

Page 76

HEATERS

OUTPUT

LEDs

WASH

EXTENDED

WASH

T10

RINSEFILL

FLOAT

SWITCH

LAMP

OUTPUT

JB2

FUSE 1A

DOOR

SWITCH

START

SWITCH

WASH

OUTPUT

RINSE

OUTPUT

JB1

JB3

POWER

LED

5 X 20 MM FAST ACTING

CLOSED JUMPER SHOWN FROM SIDE

PRINTED CIRCUIT BOARD

BLACK JUMPER SHOWN CLOSED. LIFT & REMOVE TO OPEN.

WHITE BASE

MH6N, MH6O UP TO D3857 112676 REVC OPEN OPEN CLOSED

MH6N, MH6O D3858 - UP 113597 REVG CLOSED OPEN CLOSED

MH6L ALL 113597 REVG OPEN OPEN CLOSED

MODEL SERIAL NUMBER PART NUMBER JB1 JB2 JB3

MACHINE BOARD JUMPER SETTINGS

! ATTENTION - VERY IMPORTANT ! - VERIFY CIRCUIT BOARD

PART NUMBER AND JUMPER POSITION SETTINGS (JB1, JB2, JB3) PER MACHINE MODEL AND SERIAL NUMBER AS INDICATED IN TABLE BELOW. IMPROPER JUMPER SETTINGS MAY CAUSE ERRATIC OPERATION.

TSHC WASH TANK THERMOSTAT

BOOSTER TANK THERMOSTATTSBC

LINE:120V TRANSFORMERT1

RINSE WATER VALVERWV

MAIN POWER SWITCHMPS

CYCLE LIGHTLT2

POWER ON LIGHTLT1

CYCLE SELECT JUMPERJB3

CYCLE SELECT JUMPERJB2

RINSE TIME SELECT JUMPERJB1

TANK HEAT HIGH LIMITHCHL

TANK HEAT CONTACTOR OR STEAM VALVE

HC1

TRANSFORMER FUSESFUT

TANK HEAT FUSESFUH

FLOAT SWITCHFSW

TIMER BOARD FUSEF1

DOOR SAFETY SWITCH, SIDE DOORSDS2

DOOR SAFETY SWITCH, FRONT DOORDS1

BOOSTER TANK HIGH LIMITBCHL

BOOSTER TANK CONTACTOR OR STEAM VALVE

BC1

WASH MOTOR OVERLOAD1MOL

WASH MOTOR CONTACTOR1M

DOOR SWITCH RELAY1CR

1MTR WASH MOTOR

EW EXTENDED WASH SWITCH

2CR RINSE AID SIGNAL RELAY

PER LOCAL ELECTRICAL CODE

GND

TSHC

TSBC

BC1

HC1

DS2

BCHL

RWV

DETERG.

SIGNAL

RINSE

SIGNAL

1MOL

T1 NOT USED WITH 115V LINE SUPPLY SEE NOTE 1

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

40. NOTE 2: USED ON MACHINES WITH INDEPENDENT FRONT

DOOR OPTION.

STEAM/ELECTRIC - 1 & 3 PHASE

MH-6/0/L/N-E ELECTRONIC CONTROL

701602 H

NONE

J.NEWTON

20MAY99

FSW

DOORS CLOSED TANKS EMPTY

POWER OFF

DIAGRAM STATE

END OF CYCLE

LT1

DS1

1MTR

ELECTRIC TANK HEAT IF USED

FUH HC1

4.7KW

FUH HC1

HC1FUH

BC1

ELECTRIC BOOSTER HEAT IF USED (SEE NOTE 3B)

BC1

NOTE 3: A: ON 115V MACHINES THE WASH TANK HEATER IS 3 kW. B: THE kW RATING OF THE BOOSTER ELEMENT IS DEPENDENT UPON THE VOLTAGE AND DEGREE RISE OF THE SYSTEM. SINGLE PHASE MACHINES W/ ELEC. BOOSTER ARE 40° RISE ONLY. 40° RISE UNITS USE 7.5/10 OR 9 kW ELEMENTS. 70° RISE UNITS USE 13.5/18 OR 17.7 kW ELEMENTS.

17 19

2120

30 33

34 35

L1 36

L1 L2 L3

36 37 38L3

L1 L2 L3

1M1MOL

1MTR

(IF USED)

FUT FUT

4039

ON SINGLE PHASE MACHINES OMIT L3.

L1 L2 L3

L1 L2

SEE NOTE 2

1CR

1CRA

1CRB

1CRC

2CR

2CRA

24 25 26

ELECTRIC HEAT ONLY

120V FAN SIGNAL

TO CONTACTOR COIL

SUPPLIED BY OTHERS

IF USED

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

G JAM

17MAR03

ADDED ACR SUPPRESSORS ADDED TROUBLESHOOTING REFERENCESB

4NOV99

JCN

LT1

REDRAWN MAIN POWER SWITCHC

7MAR00

JCN

MPS

ON OFF

1MOL

COIL

COMMON

NORMALLY OPEN

NORMALLY CLOSED

RELAY

REVISED SINGLE PHASE MOTOR OVERLOAD AND TANK HEAT HI LIMIT

9AUG00

JCN

4.7KW

HCHL

CHANGED TANK HEATER KW

30AUG02

SEE NOTE 3A

ADD JUMPER / SN INFORMATION.

1 NOV02

MJM

AS ARC SUPPRESSOR

ADD ARC SUPPRESSOR TO 1CR

04MAR03

JAM

CORRECTED JB1 SETTING, CLOSED SETTING WAS OPEN

2/3/04

DATE

DESCRIPTIONREV.

REV.

REV. DESCRIPTION

DATE

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.

SCALEDR.BY

DATE SHEET

129

13 14

518

Moyer Diebel MH-6LM5, MH-60M5, MH-6NM5 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual