Moyer Diebel MH-60M4, MH-6NM4, MH-6LM4 Service Manual
Simply Engineered Better
For machines beginning with
serial no. D2144 thru D3693
Technical Manual
Door-Type
Dishwasher
Model
MH-60M4
High Temperature
with Built-in Booster
MH-6NM4
High Temperature
MH-6LM4
Low Temperature
February, 2003
P. O. Box 4183
Winston-Salem, North Carolina 27115-4183
336/661-1992 Fax: 336/661-1660
Machine Serial No.
Manual P/N 113139 Rev. C
2674 N. Service Road
Jordan Station, Ontario, Canada L0R 1S0
905/562-4195 Fax: 905/562-4618
Moyer Diebel
Complete the information below so it will be available for quick reference.
Model Number Serial Number
Voltage and Phase
Moyer Diebel Parts Distributor Phone
(if applicable)
Moyer Diebel Service Agency Phone
Moyer Diebel Service:
Moyer Diebel, US
Phone: 1(336) 661-1992
1(800) 228-8350
Fax: 1(336) 661-1660
Moyer Diebel, Limited
Phone: 1(905) 562-4195
1(800) 263-5798
Fax: 1(905) 562-4618
Note: When calling to order parts, be sure to have the model number, serial number,
voltage and phase of your machine, along with your customer account number.
Machine Data Plate with
Model & Serial Number
located on the front panel.
Machine
COPYRIGHT © 2003 by Moyer Diebel
REVISIONS
Revision History
Revision Revised Serial Number Comments
Date Pages Effectivity
04/01/01 All D2144 Issue of New Service Manual and
replacement parts lists
08/07/01 63 — Changed P/N 112483 to 112484
01/03/02 53, 57 D3291 Change vacuum breaker 3/4"
PN 104429 to 113222
01/03/02 38, 39 Added straight track assembly
12/18/02 63 D3857 Inserted timer control board kit
P/N 900911 to replace 112676.
2/5/03 43 D3857 Replaced 112164 with 113514 bearings.
2/5/03 47, 61 — Replaced 108391 with 113622 thermometer.
2/5/03 59 — Replaced impeller with new number.
2/5/03 63 — Replaced Furnace (Siemens) overloads
withTelemecanique (Square D) overloads.
i
CONTENTS
LIMITED WARRANTY ............................................................................................................... v
INTRODUCTION ......................................................................................................................... 1
INSTALLATION........................................................................................................................... 8
INITIAL START-UP ..................................................................................................................... 16
OPERATION SUMMARY ........................................................................................................... 22
CLEANING ................................................................................................................................... 23
TROUBLESHOOTING ................................................................................................................ 25
BASIC SERVICE .......................................................................................................................... 27
REPLACEMENT PARTS ............................................................................................................. 33
CONTENTS
Model Number ....................................................................................................................6
Standard Equipment ........................................................................................................... 6
Options................................................................................................................................ 6
Electrical Power Requirements .......................................................................................... 7
Unpack the Dishwasher ...................................................................................................... 8
To Change from Straight-through Operation to Corner Operation .................................... 9
Electrical Connections ........................................................................................................ 10
Plumbing Connections ........................................................................................................ 12
Water Connections ......................................................................................................... 12
Drain Connections .......................................................................................................... 13
Chemical Connections.................................................................................................... 14
Cleaning Schedule .............................................................................................................. 23
Deliming Process ................................................................................................................24
ELECTRICAL SCHEMATICS ..................................................................................................... 69
LIST OF FIGURES
Figure 1 – Remove Front Panel ................................................................................................ 8
Figure 2 – Electrical Connection Location ............................................................................... 10
Figure 3 – Hinged Control Panel .............................................................................................. 11
Figure 4 – Main Terminal Block .............................................................................................. 11
Figure 5 – Hot Water Connection (MH-60 Only) ..................................................................... 12
Figure 6 – Hot Water Connection (MH-6N, MH-6L Only)...................................................... 12
Figure 7 – Drain Hose Connection ........................................................................................... 13
Figure 8 – Chemical Dispenser Signal Terminal Block ........................................................... 14
Figure 9 – Chemical Signal Connection Points ........................................................................ 14
Figure 10 – Detergent Probe Injection Points, 1/2" .................................................................... 15
ii
CONTENTS
LIST OF FIGURES (cont.)
Figure 11 – Rinse Aid and Sanitizer Injection Points .............................................................. 15
Figure 12 – Fuses ..................................................................................................................... 28
Figure 13 – Motor Overload .................................................................................................... 28
Figure 14 – Solid State Control Board ..................................................................................... 29
Figure 15 – Float Switch .......................................................................................................... 29
Figure 16 – float Switch Troubleshooting Chart...................................................................... 29
Figure 17 – Heater Element Wiring ......................................................................................... 30
Figure 18 – Pump Motor Wiring Diagrams ............................................................................. 31
Figure 19 – Pump Seal Replacement ....................................................................................... 32
Figure 20 – Doors and Panels .................................................................................................. 34
Figure 21 – Door Guides, Stops and Lift Bracket.................................................................... 36
Figure 22 – Door Handle, Spring Assembly and Safety Switch .............................................. 38
Figure 23A– Straight Track Assembly....................................................................................... 40
Figure 23B – Corner Track Assembly ........................................................................................ 40
Figure 24 – Wash/Rinse Spray Piping ..................................................................................... 42
Figure 25 – Wash/Rinse Spray Arms ....................................................................................... 44
Figure 26 – Drain Assembly and Scrap Screens ...................................................................... 46
Figure 27 – Wash Tank Heat and Thermostats......................................................................... 48
Figure 28 – Electric Booster and Thermostats (MH-60 Only) ................................................ 50
Figure 29 – Lower Fill Piping Assembly (MH-60 Only)......................................................... 52
Figure 30 – Upper Fill Piping Assembly (MH-60/6N Only) ................................................... 54
Figure 31 – Lower Fill Piping Assembly (MH-6N/6L Only) .................................................. 56
Figure 32 – Upper Fill Piping Assembly (MH-6L Only) ......................................................... 58
Figure 33 – Pump Assembly .................................................................................................... 60
Figure 34 – Control Panel and Gauges .................................................................................... 62
Figure 35 – Control Cabinet..................................................................................................... 64
Figure 36 – Dishracks and PRV ............................................................................................... 66
APPENDIXES
Appendix A – Straight-through to Corner (Door conversion kit) ................................................ 68
Appendix B – Corner to Straight-through (Door conversion kit) ................................................ 70
ELECTRICAL SCHEMATICS
B701602/D – Wiring Diagrams (MH-60, MH-6N, MH-6L Steam/Electric 1 & 3 Phase) ............ 72
iii
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INTENTIONALLY
LEFT BLANK
iv
WARRANTY
LIMITED WARRANTY
Champion Industries/Moyer Diebel Limited, P.O. Box 4183, Winston-Salem, North Carolina 27115, and P. O. Box 301, 2674
North Service Road, Jordan Station, Ontario, Canada L0R 1S0 warrants machines, and parts, as set out below.
Warranty of Machines: Champion Industries/Moyer Diebel Limited warrants all new machines of its manufacture bearing
the name “Champion” or "Moyer Diebel" and installed within the United States and Canada to be free from defects in
material and workmanship for a period of one (1) year after the date of installation or fifteen (15) months after the date of
shipment by Champion/Moyer Diebel, whichever occurs first. [See below for special provisions relating to Model Series DF
and SW.] The warranty registration card must be returned to Champion/Moyer Diebel within ten (10) days after installation.
If warranty card is not returned to Champion/Moyer Diebel within such period, the warranty will expire after one year from
the date of shipment.
Champion/Moyer Diebel will not assume any responsibility for extra costs for installation in any area where there are
jurisdictional problems with local trades or unions.
If a defect in workmanship or material is found to exist within the warranty period, Champion/Moyer Diebel, at its election,
will either repair or replace the defective machine or accept return of the machine for full credit; provided, however, as to
Model Series DF and SW, Champion/Moyer Diebel's obligation with respect to labor associated with any repairs shall end
(a) 120 days after shipment, or (b) 90 days after installation, whichever occurs first. In the event that Champion/Moyer
Diebel elects to repair, the labor and work to be performed in connection with the warranty shall be done during regular
working hours by a Champion/Moyer Diebel authorized service technician. Defective parts become the property of
Champion/Moyer Diebel. Use of replacement parts not authorized by Champion/Moyer Diebel will relieve Champion/
Moyer Diebel of all further liability in connection with its warranty. In no event will Champion/Moyer Diebel's warranty
obligation exceed Champion/Moyer Diebel's charge for the machine. The following are not covered by Champion/Moyer
Diebel's warranty:
a. Lighting of gas pilots or burners.
b. Cleaning of gas lines.
c. Replacement of fuses or resetting of overload breakers.
d. Adjustment of thermostats.
e. Adjustment of clutches.
f. Opening or closing of utility supply valves or switching of electrical supply current.
g. Adjustments to chemical dispensing equipment.
h. Cleaning of valves, strainers, screens, nozzles, or spray pipes.
i. Performance of regular maintenance and cleaning as outlined in operator’s guide.
j. Damages resulting from water conditions, accidents, alterations, improper use, abuse,
tampering, improper installation, or failure to follow maintenance and operation procedures.
Examples of the defects not covered by warranty include, but are not limited to: (1) Damage to the exterior or interior finish
as a result of the above, (2) Use with utility service other than that designated on the rating plate, (3) Improper connection to
utility service, (4) Inadequate or excessive water pressure, (5) Corrosion from chemicals dispensed in excess of recommended concentrations, (6) Failure of electrical components due to connection of chemical dispensing equipment installed
by others, (7) Leaks or damage resulting from such leaks caused by the installer, including those at machine table connections or by connection of chemical dispensing equipment installed by others, (8) Failure to comply with local building
codes, (9) Damage caused by labor dispute.
Warranty of Parts: Champion/Moyer Diebel warrants all new machine parts produced or authorized by Champion/Moyer
Diebel to be free from defects in material and workmanship for a period of 90 days from date of invoice. If any defect in
material and workmanship is found to exist within the warranty period Champion/Moyer Diebel will replace the defective
part without charge.
DISCLAIMER OF WARRANTIES AND LIMITATIONS OF LIABILITY. CHAMPION/MOYER DIEBEL'S
WARRANTY IS ONLY TO THE EXTENT REFLECTED ABOVE. CHAMPION/MOYER DIEBEL MAKES NO
OTHER WARRANTIES, EXPRESS OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, ANY WARRANTY OF
MERCHANTABILITY, OR FITNESS OF PURPOSE. CHAMPION/MOYER DIEBEL SHALL NOT BE LIABLE FOR
INCIDENTAL OR CONSEQUENTIAL DAMAGES. THE REMEDIES SET OUT ABOVE ARE THE EXCLUSIVE
REMEDIES FOR ANY DEFECTS FOUND TO EXIST IN CHAMPION/MOYER DIEBELDISHWASHING MACHINES AND CHAMPION/MOYER DIEBEL PARTS, AND ALL OTHER REMEDIES ARE EXCLUDED, INCLUDING ANY LIABILITY FOR INCIDENTALS OR CONSEQUENTIAL DAMAGES.
Champion/Moyer Diebel does not authorize any other person, including persons who deal in Champion/Moyer Diebel
dishwashing machines, to change this warranty or create any other obligation in connection with Champion/Moyer Diebel
Dishwashing Machines.
rev. 8699
v
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INTENTIONALLY
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vi
INTRODUCTION
INTRODUCTION
Welcome to Moyer Diebel...and thank you for allowing us to take care of your dishwashing
needs.
This manual covers the door-type dishwasher, Models MH-60, MH-6N, MH-6L.
Your machine was completely assembled, inspected, and thoroughly tested at our factory before it
was shipped to your installation site.
This manual contains:
• Installation Instructions
• Operation and Cleaning Instructions
•Troubleshooting Guide
• Basic Service Information
• Replacement Parts Lists
• Electrical Schematics
All information, illustrations and specifications contained in this manual are based upon
the latest product information available at the time of publication. Moyer Diebel constantly
improves its products and reserves the right to make changes at any time or to change
specifications or design without notice and without incurring any obligation.
For your protection, factory authorized parts should always be used for repairs.
Replacement parts may be ordered directly from your Moyer Diebel authorized parts distributor
or authorized service agency. When ordering parts, please supply the model number, serial
number, voltage, and phase of your machine, the part number, part descriptions and quantity.
1
GENERAL
MODEL NUMBERS
MH-60, MH-6N, MH-6L
The MH-60 model is a high temperature
(180°F/82°C rinse) sanitizing model with
booster.
The MH-6N model is a high temperature
(180°F/82°C rinse) sanitizing model without
booster.
The MH-6L is a low temperature (Min. 120°F/
49°C-140°F/60°C Optimum) sanitizing model
for use with a sodium hypochlorite (Chlorine)
based sanitizer at a minimum concentration of
50 PPM in the final rinse.
Standard Equipment includes:
MH-60, MH-6N, MH-6L
• Automatic tank fill and start
• Built-in electric booster heater (MH-60 only)
• Field convertible to corner model with kit
• Electric tank heat
• Balanced three door lift system
• Low-water tank heat protection
• 1-hp drip-proof pump motor
• Door safety switch
Options (MH-60 only)
• Electric booster (70°F/39°C temperature
rise) heater for 110°F/43°C supply water
• Steam injector or steam coil tank heat
(steam booster 40°F/23°C-70°F/39°C rise)
Accessories
Additional dishracks:
Dish rack (peg) P/N 101285
Silverware rack (flat bottom) P/N 101273
3/4" Pressure reducing valve (PRV) P/N 112387
• Common utility connections
•Two dish racks (peg and flat bottom)
• Detergent/chemical connection provisions
• Stainless steel front and side panels
• 60-second time cycle
• 1-1/2" O.D. gravity drain connection
•Water pressure reducing valve (MH-60 only)
• Interchangeable upper and lower spray arms
2
GENERAL
Electrical Power Requirements: Fig Electric Heat/Electric Booster
Model Voltage Booster Rise Rated Minimum Supply Ckt. Maximum Overcurrent
(MH-60 Only) Amps Conductor Ampacity Protective Device
MH-6N/MH-6L 115/60/1 — 48 Amps 60 Amps 60 Amps
MH-6N/MH-6L 208/60/1 — 25 Amps 35 Amps 35 Amps
MH-6N/MH-6L 220/60/1 — 25 Amps 35 Amps 35 Amps
MH-6N/MH-6L 230/60/1 — 26 Amps 35 Amps 35 Amps
MH-6N/MH-6L 240/60/1 — 26 Amps 35 Amps 35 Amps
MH-6N/MH-6L 208/60/3 — 13 Amps 20 Amps 20 Amps
MH-6N/MH-6L 220/60/3 — 14 Amps 20 Amps 20 Amps
MH-6N/MH-6L 230/60/3 — 14 Amps 20 Amps 20 Amps
MH-6N/MH-6L 240/60/3 — 15 Amps 20 Amps 20 Amps
MH-6N/MH-6L 380/60/3 — 8 Amps 15 Amps 15 Amps
MH-6N/MH-6L 415/60/3 — 9 Amps 15 Amps 15 Amps
MH-6N/MH-6L 480/60/3 — 7 Amps 15 Amps 15 Amps
MH-6N/MH-6L 575/60/3 — 6 Amps 15 Amps 15 Amps
MH-60 115/60/1 — — — —
MH-60 208/60/1 40°F/23°C 69 Amps 80 Amps 80 Amps
MH-60 220/60/1 40°F/23°C 69 Amps 80 Amps 80 Amps
MH-60 230/60/1 40°F/23°C 76 Amps 90 Amps 90 Amps
MH-60 240/60/1 40°F/23°C 76 Amps 90 Amps 90 Amps
MH-60 208/60/3 40°F/23°C 39 Amps 45 Amps 45 Amps
MH-60 220/60/3 40°F/23°C 39 Amps 45 Amps 45 Amps
MH-60 230/60/3 40°F/23°C 43 Amps 40 Amps 40 Amps
MH-60 240/60/3 40°F/23°C 43 Amps 40 Amps 40 Amps
MH-60 380/60/3 40°F/23°C 24 Amps 30 Amps 30 Amps
MH-60 415/60/3 40°F/23°C 25 Amps 30 Amps 30 Amps
MH-60 480/60/3 40°F/23°C 18 Amps 25 Amps 25 Amps
MH-60 575/60/3 40°F/23°C 15 Amps 20 Amps 20 Amps
MH-60 115/60/1 — — — —
MH-60 208/60/1 — — — —
MH-60 220/60/1 — — — —
MH-60 230/60/1 — — — —
MH-60 240/60/1 — — — —
MH-60 208/60/3 70°F/39°C 50 Amps 70 Amps 70 Amps
MH-60 220/60/3 70°F/39°C 50 Amps 70 Amps 70 Amps
MH-60 230/60/3 70°F/39°C 58 Amps 80 Amps 80 Amps
MH-60 240/60/3 70°F/39°C 58 Amps 80 Amps 80 Amps
MH-60 380/60/3 70°F/39°C 31 Amps 40 Amps 40 Amps
MH-60 415/60/3 70°F/39°C 33 Amps 45 Amps 45 Amps
MH-60 480/60/3 70°F/39°C 28 Amps 35 Amps 35 Amps
MH-60 575/60/3 70°F/39°C 23 Amps 30 Amps 30 Amps
Electrical Power Requirements:Fig Steam or Gas Heat/Steam or Gas Booster
Model Voltage Booster Rise Rated Minimum Supply Ckt. Maximum Overcurrent
MH-6N/MH-6L 115/60/1 — 22 Amps 30 Amps 30 Amps
MH-6N/MH-6L 208/60/1 — 22 Amps 15 Amps 15 Amps
MH-6N/MH-6L 220/60/1 — 13 Amps 15 Amps 15 Amps
MH-6N/MH-6L 230/60/1 — 13 Amps 15 Amps 15 Amps
MH-6N/MH-6L 240/60/1 — 11 Amps 15 Amps 15 Amps
MH-6N/MH-6L 208/60/3 — 6 Amps 15 Amps 15 Amps
MH-6N/MH-6L 220/60/3 — 6 Amps 15 Amps 15 Amps
MH-6N/MH-6L 230/60/3 — 6 Amps 15 Amps 15 Amps
MH-6N/MH-6L 240/60/3 — 6 Amps 15 Amps 15 Amps
MH-6N/MH-6L 380/60/3 — 4 Amps 15 Amps 15 Amps
MH-6N/MH-6L 415/60/3 — 4 Amps 15 Amps 15 Amps
MH-6N/MH-6L 480/60/3 — 3 Amps 15 Amps 15 Amps
MH-6N/MH-6L 575/60/3 — 3 Amps 15 Amps 15 Amps
MH-60 115/60/1 — — — —
MH-60 208/60/1 40°F/23°C 22 Amps 30 Amps 30 Amps
MH-60 220/60/1 40°F/23°C 22 Amps 15 Amps 15 Amps
MH-60 230/60/1 40°F/23°C 13 Amps 15 Amps 15 Amps
MH-60 240/60/1 40°F/23°C 13 Amps 15 Amps 15 Amps
MH-60 208/60/3 40°F/23°C6 Amps 15 Amps 15 Amps
MH-60 220/60/3 40°F/23°C6 Amps 15 Amps 15 Amps
MH-60 230/60/3 40°F/23°C6 Amps 15 Amps 15 Amps
MH-60 240/60/3 40°F/23°C6 Amps 15 Amps 15 Amps
MH-60 380/60/3 40°F/23°C4 Amps 15 Amps 15 Amps
MH-60 415/60/3 40°F/23°C4 Amps 15 Amps 15 Amps
MH-60 480/60/3 40°F/23°C3 Amps 15 Amps 15 Amps
MH-60 575/60/3 40°F/23°C3 Amps 15 Amps 15 Amps
MH-60 115/60/1 — — — —
MH-60 208/60/1 — — — —
MH-60 220/60/1 — — — —
MH-60 230/60/1 — — — —
MH-60 240/60/1 — — — —
MH-60 208/60/3 70°F/39°C6 Amps 15 Amps 15 Amps
MH-60 220/60/3 70°F/39°C6 Amps 15 Amps 15 Amps
MH-60 230/60/3 70°F/39°C6 Amps 15 Amps 15 Amps
MH-60 240/60/3 70°F/39°C6 Amps 15 Amps 15 Amps
MH-60 380/60/3 70°F/39°C4 Amps 15 Amps 15 Amps
MH-60 415/60/3 70°F/39°C4 Amps 15 Amps 15 Amps
MH-60 480/60/3 70°F/39°C3 Amps 15 Amps 15 Amps
MH-60 575/60/3 70°F/39°C3 Amps 15 Amps 15 Amps
(D-HBT Only) Amps Conductor Ampacity Protective Device
3
INSTALLATION
INSTALLATION
Unpack the dishwasher
CAUTION:
!
Care should be taken when lifting the
machine to prevent damage.
NOTE:
The installation of your machine must meet
all applicable health and safety codes.
1. Immediately after unpacking the machine,
inspect for any shipping damage. If damage
is found, save the packing material and
contact the carrier immediately.
2. Remove the dishwasher from the skid.
Move the machine to its permanent location.
NOTE:
Refer to: To change from Straight-through
Operation to Corner Operation on the next
POWER
FILL
CYCLE
EXTENDED
WASH
RINSE
WASH
WARNING!
TURN OFF POWER BEFORE
SERVICING MACHINE
page if your machine will be placed for
corner operation.
3. Level the machine (if required) by placing a
level on the top of the machine and adjusting
the feet. Level the machine front-to-back and
side-to-side.
4. Remove the dishracks from the interior of
the machine.
5. Refer to Fig. 1. Remove (2) screws that hold
the front panel. Remove the front panel in
preparation for service connections.
Figure 1
Remove Front Panel
Changing Operation – Straight-through to Corner
Your door-type dishwasher was specified to the factory as a straight-through configuration or as a
corner configuration. Your machine can be converted from straight-through to corner or from
corner to straight-through. The factory has kits for these types of conversions. For instructions
and part numbers, see Appendixes A, B and C.
4
INSTALLATION (Cont.)
Electrical Connections
WARNING:
!
Electrical and grounding connections must
comply with all applicable Electrical
Codes.
WARNING:
!
When working on the dishwasher, disconnect the electric service and place a tag at
the disconnect switch to indicate work is
being done on that circuit.
1. A qualified electrician must compare the
electrical power supply with the machine
electrical specifications before connecting
to the incoming service through a fused
disconnect switch.
INSTALLATION
Electrical knock-out
lower rear corner
Refer to Fig. 2
2. A knock-out is provided at the lower right
rear corner (as viewed from the front) for
the electrical service connection. A fused
disconnect switch or circuit breaker
(supplied by others) is required to protect
the power supply circuit.
Figure 2
Electrical Connection Location
5
INSTALLATION
Electrical Connections (Cont.)
Refer to Fig. 3
3. Remove (2) lower screws from the front
panel of the machine to expose the electrical controls. Remove (2) screws on the
control panel support. Swing the hinged
control panel forward.
Figure 3
Hinged Control Panel
Refer to Fig. 4
4. Three phase or single phase incoming
power wiring connections are made at the
bottom of the machine’s main terminal
block. The main terminal block is located
on the side of the front right post of the
dishwasher.
Electrical Power Connection
Figure 4
Main Terminal Block
6
INSTALLATION (Cont.)
Plumbing Connections
NOTE:
Plumbing connections must comply with
all applicable sanitary and plumbing
codes.
INSTALLATION
Water Connections
1. All MH series dishwashers require a
single, hot water supply.
The hot water connection to all MH
series dishwashers is 3/4" NPT.
The connection is made from
underneath the dishwasher.
The following minimum water
temperatures are recommended:
MH-60 with built-in 40° rise electric
booster (Minimum 140°F/60°C)
(Min./Max. flow pressure
20-22 PSI/138-151.8 kPa)
MH-60 with built-in 70° rise electric
booster (Minimum 110°F/43°C)
(Min./Max. flow pressure
20-22 PSI/138-151.8 kPa)
MH-6N without built-in booster
(Minimum 180°F/70°C)
(Min./Max. flow pressure
20-22 PSI/138-151.8 kPa)
MH-6L low temperature
(Minimum 120°F/49°C-
140°F/60°C Optimum)
(Min./Max. flow pressure
20-22 PSI/138-151.8 kPa)
Refer to Figs. 5 and 6
12"
[305mm]
Figure 5
Hot Water Connection
(MH-60 Only)
3/4" NPT
12"
[305mm]
R
O
FLO
Figure 8
Hot Water Connection
(MH-6N, MH-6L Only)
3/4" NPT
FLO
OR
7
INSTALLATION
Water Connections (Cont.)
2. A manual shut-off valve for steam and water
(supplied by others) should be installed in
the supply line to allow for servicing of the
machine. The shut-off valve should be the
same size or larger than the supply line.
3. Install a 3/4" pressure reducing valve (PRV)
in the water supply line if flow pressure
exceeds 20-22 PSI/138-151.8 kPa.
A PRV is standard equipment on Model
MH-60. A PRV is not standard equipment on
Models MH-6N, MH-6L.
Drain Connections
Refer to Fig. 9
1. MH series models are GRAVITY DRAIN
machines equipped with a 1-1/2" O.D.
hose connection point.
2. The maximum drain flow rate is
15 gallons/min-56.8 liters/min.
3. Drain height for all models must not
exceed 11" (280mm) above floor level.
4. The drain connection is made to the
dishwasher from underneath the machine
through an access hole in the machine
base.
Ventilation
NOTE:
Ventilation must comply with local sanitary
and plumbing codes.
CAUTION:
!
Exhaust air should not be vented into a
wall, ceiling, or concealed space of a
building. Condensation can cause
damage.
11" [280mm]
Above floor level
Figure 7
Drain Hose Connection
1-1/2" O.D.
(Max flow rate = 15 gal/min-56.8 liters/min)
8
INSTALLATION (Cont.)
Chemical Connections
NOTE:
Consult a qualified chemical supplier
for your chemical needs.
Refer to Fig. 8
1. A chemical signal terminal block is
supplied for chemical dispensing
equipment.
2. The terminal block is located below
the control panel fuse block.
INSTALLATION
Refer to Fig. 9
3. The detergent signal is limited
to a maximum load of 1 Amp.
Signal voltage is 115VAC.
4. The Rinse aid/Sanitizer
signal is limited to a maximum load of 1 Amp.
Signal voltage is 115VAC.
COMMON
Figure 8
Chemical Dispenser
Signal
Terminal Block
Detergent Signal Connection Point
1 Amp Max Load/115VAC
Common Return
RINSE
DETERGENT
Rinse aid/Sanitizer
Signal Connection Point
1 Amp Max load/115VAC
Figure 9
Chemical Signal
Connection Points
9
INSTALLATION
Chemical Connections (Cont.)
Refer to Fig. 10
5. A 1/2" detergent probe injection point is
provided at the rear and left side of the
dishwasher.
6. Detergent may be added manually if
your dishwasher is not equipped with
dispensing equipment. Consult your
chemical supplier for recommended
amounts.
Refer to Fig. 11
7.
MH-60, 6N, 6L
A 1/4" NPT rinse aid injection point is
provided in the final rinse manifold.
Use a liquid rinse aid.
Figure 10
Detergent Probe
Injection Points, 1/2"
MH-60, 6N
The manifold is located on the top right
side of the dishwasher.
MH-6L Only
8.
A 1/8" NPT sanitizer injection point is
provided in the final rinse manifold.
Models MH-60 and MH-6N do not
require sanitizer.
9. Use a sodium hypochlorite (Chlorine)
based sanitizer at a minimum concentration of 50PPM in the final rinse.
10. Use chlorine test papers to verify and
monitor the 50PPM chlorine level.
WARNING:
!
Never premix rinse aid with the
sanitizing agent. Mixing may cause
hazardous gases to form.
CAUTION:
!
Some metals, including silver, aluminum
and pewter, are attacked by sodium
hypochlorinte (chlorine). Avoid cleaning
these metals in a MH-6L.
1/4" NPT rinse-aid
injection point
Model MH60, 6N, 6L
1/8" NPT sanitizer
injection point
Model MH6L Only
10
Figure 11
Rinse Aid and
Sanitizer Injection Points
(Top of Dishwasher)
INITIAL START-UP
Complete the installation
After plumbing and electrical connections are made, follow
the steps below to complete the installation of your dishwasher.
1. Remove the white protective covering from the
exterior of the machine.
2. Remove any foreign material from inside
the machine.
3. Make sure dishwasher power switch is off.
4. Turn main water supply on.
5. Turn main power on at the main power
service disconnect switch.
INITIAL START-UP
1
Install the Scrap Screens
and Drain-Overflow Assembly
Install scrap screens.
Make sure rubber stopper
is secure on the drainoverflow assembly.
Make sure the drain-overflow
seats securely in the
tank bottom.
MAKE SURE DOORS
ARE FULLY CLOSED.
2
The controls are located
on the front of the dishwasher.
A- On/Off power switch
B- Power indicator Light
C- In-cycle light
D- Extended wash switch
E- Wash water
temperature gauge
F- Final rinse
pressure gauge
A
E
POWER
OFF
WASH
B
C
EXTENDED
CYCLE
RINSE PRESSURE
WASH
D
F
11
INITIAL START-UP
INITIAL START-UP (CONT.)
3
THE POWER SWITCH IS
ON DURING INITIAL FILL.
Make sure the doors are fully closed.
Push the On/Off power
switch to the UP position.
THE DISHWASHER FILLS
AUTOMATICALLY.
NOTE:
The dishwasher will fill automatically each
time the power is turned off even if the
dishwasher is full of water.
4
Note that the power indicator
light is illuminated.
POWER
OFF
POWER
OFF
WASH
WASH
CYCLE
EXTENDED
CYCLE
RINSE PRESSURE
EXTENDED
RINSE PRESSURE
WASH
WASH
5
Check Wash
Water Temperature
The wash tank heater and
the (booster tank heater, MH-60 only)
will begin to heat the water in
the dishwasher.
Wait approximately 10 minutes
for the wash tank water to
reach operating temperature.
The temperature should be a minimum
of 150°F/66°C for (MH-60, MH-6N).
The MH-6L requires a minimum of
120°F/49°C. However, a minimum of
140°F/60°C is optimum for the MH-6L.
Prescrap the dishes. Load ware into
the dishrack. Open the doors, insert the
rack into the dishwasher.
POWER
OFF
WASH
EXTENDED
CYCLE
RINSE PRESSURE
WASH
12
INITIAL START-UP (CONT.)
6
Fully close the dishwasher doors.
The dishwasher will begin the
automatic cycle.
Opening the doors anytime
during the cycle will stop the
dishwasher.
Closing the doors will resume
the automatic cycle where it
left off.
The cycle times are listed below:
INITIAL START-UP
Wash = 45 seconds
Dwell = 1 second
Final rinse = 14 seconds
7
Note that the in-cycle light
is lit during the automatic
dishwasher cycle.
POWER
OFF
WASH
EXTENDED
CYCLE
RINSE PRESSURE
WASH
13
INITIAL START-UP
250
2
0
0
1
5
0
100
5
0
0
INITIAL START-UP (CONT.)
8
Check Final Rinse
Water Temperature
Check the final rinse water
temperature during the
final rinse cycle.
The final rinse water
temperature gauge is located
in the final rinse piping at
the top of the dishwasher.
The final rinse water temperature should be a minimum of
180°F/82°C for (MH-60, MH-6N).
The optimum final rinse temperature
for (MH-60, MH-6N) is
180-195°F/82-91°C.
The MH-6L requires a minimum final
rinse temperature of 120°F/49°C.
However, a minimum final rinse temperature of
140°F/60°C is optimum for the MH-6L.
9
Check Final Rinse
Water Pressure
The final rinse water pressure gauge
should indicate a flowing pressure of
20-22 PSI/138-151.8 kPa during the
final rinse cycle for all models.
A pressure reducing valve (PRV) is
required if flow pressure exceeds
20-22 PSI/138-151.8 kPa.
POWER
OFF
WASH
EXTENDED
CYCLE
RINSE PRESSURE
WASH
14
INITIAL START-UP (CONT.)
INITIAL START-UP
10
The Extended Wash
Operation
The extended wash switch holds the
dishwasher in a continuous wash mode
for cleaning heavily soiled ware.
Open and then fully close the
dishwasher doors. The dishwasher will begin a wash
cycle automatically.
Push the Extended wash switch UP
to the extended wash position.
The dishwasher will remain in a continuous wash mode
until the switch is flipped down. The dishwasher will
resume the cycle and finish with a final rinse.
11
POWER
OFF
WASH
EXTENDED
CYCLE
RINSE PRESSURE
WASH
Complete the initial start-up
Check all the plumbing for leaks. Also, check the drain plumbing for leaks and be sure that the drain will
handle the drain water flow (15 gal/min-56.8 liters/min) from the dishwasher.
After the drain and the plumbing connections are checked, turn off the dishwasher power switch.
12
Drain the dishwasher
Make sure the dishwasher
power switch is turned off.
Drain the dishwasher by
pulling the handle of the
drain-overflow assembly straight up. Rotate the
handle 90° to lock the drain
in the up position.
15
INITIAL START-UP
INITIAL START-UP (Cont.)
13
Drain the dishwasher (Cont.)
Be sure the drain-overflow seal is secure
on the drain-overflow assembly.
14
Remove the scrap screens and
check the drain located in
the bottom of the dishwasher
wash tank.
Make sure that the building drain handles the
water flow exiting the dishwasher.
Clean the interior of the wash
tank of any foreign material.
Leave the doors open to air
dry the interior of the
dishwasher.
The initial start-up is complete.
16
OPERATION SUMMARY
Action Result
OPERATION
1. Push the On/Off power switch “UP” to
the ON position. Dishwasher fills
automatically.
2. Wait approximately 10 minutes for the
wash tank heater to heat the water. Then,
check the reading on the wash water
temperature gauge.
3. Prescrap and load the ware into the
dishrack.
4. Open the doors.
Insert a dishrack of soiled ware.
Fully close the doors.
Opening the doors anytime during the
automatic cycle stops the dishwasher.
Closing the doors will resume the cycle
where it left off.
5. Check the final rinse temperature gauge
reading during the 14 second final rinse
cycle.
1. The power indicator light illuminates. The
wash tank heater and the booster tank heater
begin to heat.
2. The wash water temperature gauge should
indicate a minimum of 150°F/66°C for MH60,MH-6N and 120°F/60°C for MH-6L.
3. Ware should be placed edgewise in the peg
rack. Cups and bowls should be placed upside
down in the flat rack. Silverware should be
spread evenly in a single layer in the flat rack.
4. In-cycle light illuminates as the dishwasher
begins a 60 second automatic cycle.
The cycle times are listed below:
Wash = 45 seconds
Dwell = 1 second
Final rinse = 14 seconds
5. The final rinse temperature gauge should
indicate a minimum of 180°F/82°C for MH60/6N. The optimum final rinse temperature
range is between 180-195°F/82-90°C for
MH60/6N. MH-6L optimum is 140°F/60°C.
6. Check the incoming water pressure
during the 10 second final rinse cycle.
7. The 60 second automatic cycle ends.
8. Open the doors. Remove the clean rack.
Insert another rack of soiled ware.
Fully close the doors.
9. Turn power OFF at the dishwasher.
Remove the drain-overflow assembly.
Clean the scrap screens. Clean the
dishwasher after each meal period or
every two hours of operation.
6. The water pressure gauge should indicate a
flowing pressure of 20-22 PSI/138-151.8 kPa.
A pressure reducing valve (PRV) is required if
flow pressure exceeds 20-22 PSI/138-151.8 kPa.
7. The in-cycle light goes out.
8. The 60 second automatic cycle begins again.
9. Dishwasher wash tank drains completely.
Periodic cleaning reduces detergent
consumption and improves washing results.
17
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