Page 1
336/661-1992 Fax: 336/661-1660 Technical Manual Door-Type Dishwasher Machine Serial No. Manual 2674 N. Service Road Jordan Station, Ontario, Canada L0R 1S0 905/562-4195 Moyer Diebel Model MH-60M5 High Temperature with Built-in Booster MH-6NM5 High Temperature MH-6LM5 Low Temperature 113494 Rev E...
Revision History Revision Revised Serial Number Date Pages 07/01/02 10/18/02 10/18/02 13, 17, 24 10/18/02 42,43 10/18/02 10/18/02 53, 56 10/24/02 12/18/02 2/5/03 47, 61 2/5/03 7/22/03 7/22/03 53,57 7/22/03 2/3/04 50-51 2/3/04 Comments Effectivity D3694 Issue of New Service Manual and replacement parts list D3858 Revised rated amps listing...
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...
Page 5
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 –...
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.
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.
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.
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. Contact the factory for instructions on changing the operation of your dishwasher.
Electrical and grounding connections must comply with all applicable Electrical Codes. WARNING: When working on the dishwasher, discon- nect 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...
The main terminal block is located on the side of the front right post of the dishwasher. Figure 3 Hinged Control Panel Electrical Power Connection Figure 4...
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.
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.
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.
Page 18
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.
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.
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. Note that the power indicator light is illuminated. 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.
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:...
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.
Page 23
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. Drain the dishwasher Make sure the dishwasher power switch is turned off.
Page 24
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.
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.
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.
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.
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.
Page 29
TROUBLESHOOTING CONDITION Insufficient pumped Clogged pump intake screen... spray pressure Clogged spray pipe ... Scrap screen full ... Low water level in tank... Pump motor rotation incorrect ... Defective pump seal ... Insufficient final rinse Faulty pressure reducing valve ... or no final rinse Improper setting on pressure ...
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.
(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 Figure 12 the main service disconnect switch.
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. •...
Page 33
Troubleshooting Timer Circuit Board (cont.) Power Terminals • Verify that the board is receiving power of 120 VAC at the terminals: – T2, marked “H” (AC Hot). – T1, marked “N” (AC Neutral). If either of these terminals is not receiving 120 VAC, then there is a problem elsewhere with the unit not receiving power.
Page 34
1.4 Testing Board Outputs After you have verified that the circuit board is receiving power (as explained above), then test the board outputs. There are 4 board outputs: • Wash Cycle. • Rinse Cycle. • Heaters. • In-Cycle Lamp. Perform the following steps to test a board output: 1.
Page 35
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 sec- onds to fill the tank.
Page 36
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.
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.
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.
Page 40
REPLACEMENT PARTS Figure 20 - MH-60/6N/6L Doors and Panels...
Page 41
Fig. 20 Part Item No. 325405 Side Door ... 327131 Front Door ... 321929 RH Panel, No Cut Out ... 321930 Panel, Instrument... 112389 Decal, Control Panel ... 322074 Panel, Front Lower ... 321941 LH Panel w/Cut Out ... 108418 Plug Plastic ...
Page 42
REPLACEMENT PARTS FRONT OF HOOD Figure 21 - MH-60/6N/6L Door Guides, Stops, and Lift Bracket...
Page 43
DOOR GUIDES, STOPS, AND LIFT BRACKET Fig. 21 Part Item No. 108053 Plug, Cornerpost ... 107966 Nut, Grip 10-32 w/Insert ... 327104 Bracket, Door Lift ... 100007 Screw 10-32 x 3/8" Truss Head ... 327103 Door Lift Bracket... 100097 Scew 10-32 x 1/2" Truss Head ... 108347 Guide, Door ...
Page 44
REPLACEMENT PARTS Figure 22 - MH-60/6N/6L Door Handle, Spring Assembly, and Safety Switch...
Page 45
DOOR HANDLE, SPRING ASSEMBLY, AND SAFETY SWITCH Fig. 22 Part Item No. 112723 Bolt 5/16-18 x 15 Hex Head ... 108066 Spring, Extension... 107397 Block, Spring Hook ... 0509166 Door Handle... 107437 Bolt M6 x 45MM Hex Head ... 107396 Block, Upper Pivot...
Page 76
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 NOTE 2: USED ON MACHINES WITH INDEPENDENT FRONT L1 L2 L3 DOOR OPTION. ON SINGLE PHASE ! ATTENTION - VERY IMPORTANT ! - MACHINES OMIT L3.
Need help?
Do you have a question about the MH-60M5 and is the answer not in the manual?
Questions and answers