Installation/Operation Manual with Service Replacement Parts Rack Conveyor Dishwasher MD-44 44" Single Tank with built-in electric booster Single Tank Model MD-44 MD-66 44" Single Tank with 22" Prewash with built-in electric booster Single Tank w/Prewash Model MD-66 Dishwasher serial no. Issue Date: 3.27.13 www.moyerdiebel.com 3765 Champion Boulevard Winston-Salem, NC 27105 336/661-1992 Fax: 336/661-1660 Toll-free: 800.858.4477 Manual P/N 114725 rev.
For future reference, record your dishwasher information in the box below.
PRODUCT REGISTRATION ONLINE MAKE SURE YOU ARE CONNECTED TO THE INTERNET THEN ENTER THE ADDRESS BELOW TO REGISTER YOUR PRODUCT ONLINE In the U.S.A http://www.moyerdiebel.com/register In Canada http://www.championindustries.
PRODUCT REGISTRATION BY FAX COMPLETE THIS FORM AND FAX TO: (336) 661-1660 in the USA 1-(800) 204-0109 in Canada PRODUCT REGISTRATION CARD Serial # Model Date of Installation: Company Name: Address: Telephone #: ( ) --- (Street) Province Postal Code Contact: Installation Company: Address: Telephone #: Contact: FAILURE TO REGISTER YOUR PRODUCT MAY VOID YOUR WARRANTY IMPORTANT IMPORTANT
Revision History Revision History A revision might be a part number change, new instructions, or information that was not available at print time. We reserve the right to make changes to this manual without notice and without incurring any liability by making the changes. Dishwasher owners may request a revised manual, at no charge, by calling (800) 263-5798 in Canada. Revision Date Revised Pages Serial Number Effectivity Description 9.30.10 All RM10050001 Released First Edition 12.2.
Limited Warranty LIMITED WARRANTY Moyer Diebel, 3765 Champion Boulevard, Winston-Salem, North Carolina 27105, and P.O. Box 301, 2674 N. Service Road, Jordan Station, Canada, L0R 1S0, warrants machines, and parts, as set out below.
Table of Contents MD-44 and MD-66 Rack Conveyor Dishwashers Revisions to this manual.............................................................................................. i Limited Warranty ......................................................................................................... ii Model Descriptions ...................................................................................................... iv Installation ................................................................
Model Descriptions Model Descriptions Model MD-44 Electric high temperature single tank rack conveyor dishwasher with a built-in electric booster in 40°F/22°C rise or optional 70°F/39°C rise. This model's direction of operation is convertible in the field. Model MD-66 Electric high temperature single tank with prewash tank rack conveyor dishwasher with a built-in electric booster in 40°F/22°C rise or optional 70°F/39°C rise.
Installation Receiving 1. Inspect the outside of the dishwasher carton for signs of damage. 2. Remove the carton and inspect the dishwasher for damage. 3. Check for any options or accessories that may have shipped with your dishwasher. 4. Turn to the front of this manual and follow the instructions to register your product online or by fax. NOTE: The installation of your dishwasher must be performed by qualified service personnel.
MD-44 Direction Field Conversion MD-44 Direction Field Conversion ATTENTION Conversion must be performed BEFORE the machine is permanently located and utilities connected. Access to the rear of the machine is required to perform the conversion. Parts Needed for Conversion (Supplied by Others) Qty. 1, Street Elbow, 3/4" NPT x 90°, Brass: For R-L to L-R Conversion Qty.
MD-44 Direction Field Conversion MD-44 Direction Field Conversion Refer to the illustration on the previous page and note that machine assemblies are numbered from 1-8A and labeled. To convert the machine, remove the assemblies in numerical order and reinstall them as described below. Remove the front panel. 1. Remove the pawl bar assembly. Remove the crosshead from the end on the pawl bar. Reattach the crosshead on the opposite end of the pawl bar.
MD-44 Direction Field Conversion MD-44 Direction Field Conversion (continued) 5. Removing the final rinse manifold requires that the rear track be unfastened to provide clearance. Refer to the illustration below. Remove six bolts holding the track supports that connect the front and rear tracks, then remove the four bolts holding the rear track at each end of the machine. Pull the rear track away from the rear of the hood slightly. It is not necessary to pull the rear track out of the machine. 5 5A.
MD-44 Direction Field Conversion MD-44 Direction Field Conversion 8. Remove the rinse drain piping from the unload end of the tank. To do this, remove three sections of black hose connecting the drain piping together (see the illustration below). The easiest way to remove the drain piping is from the rear of the machine. Remove the nipple in the 90° elbow then remove the elbow from the tank fitting. 8 = Hose 8A.
MD-44 Direction Field Conversion MD-44 Direction Field Conversion (continued) 10. R-L to L-R Conversion ONLY Rotate the drain piping assembly removed in Step 8 180° and install it on the opposite end of the machine. The easiest way to insert the piping is from the rear of the machine. Install drain basket and the elbow. Screw the nipple into the elbow and connect the hoses to the drain piping and the drain trunk. See the illustration below. 10 10A 10B 10B 10A.
MD-44 Direction Field Conversion MD-44 Direction Field Conversion 12. L-R to R-L Conversion ONLY Rotate the drain piping assembly removed in Step 8 180° and install it on the opposite end of the machine. The easiest way to insert the piping is from the rear of the machine. Install drain basket and the elbow. Screw the nipple into the elbow and connect the hoses to the drain piping and the drain trunk. See the illustration below. 12 12A 46-1/2" 12B 31-1/2" 12C 12A.
MD-44 Direction Field Conversion MD-44 Direction Field Conversion (continued) Changing Wire Connections in the Lower Junction Box The direction change requires that the rack switch and the final rinse switch connections must be reversed on the terminal bock located behind the front panel of the machine. WARNING: Electrocution or serious injury may result when working on an energized circuit. Disconnect power at the main breaker or service disconnect switch before working on the circuit.
MOTOR DRIVE PUMP WASH COLOR BR RED CORD FROM MOTOR WHITE BLACK R B BL R B B GY B W R R 5 15 14 13 W W W 2 2 3 B 3 29 DRAIN TEMPERING VALVE TANK HEAT TSTAT 28 Y HI LIMIT Y 5 17 16 FINAL RINSE SWITCH RACK SWITCH W 13 JAM SWITCH 3 DOOR SWITCH B 3 W 32 Y 3 3 B 3 33 70 B 14 W W W 15 R WASH FLOAT UPPER-LOWER HI LIMIT USED ONLY WITH BOOSTER BSTR HEAT TSTAT 31 W 30 Y HARNESS FROM MAIN CABINET MD44 JUNCTION BOX WIRING DIAGRAM B702285/0 15 14 13 5
Installation Utilities Hot Water Connections NOTE: Only qualified personnel should make dishwasher plumbing connections. Connections must meet local plumbing and sanitary codes. Improper installation is not covered be the dishwasher warranty. Hot Water Requirements: 1. Connect a 3/4" NPT hot water supply line to the line strainer located at the top rear of the dishwasher. A water hardness of 3 grains/gal (US) [51.3 mg/L] or less is recommended. 2.
Installation Drain Connections 1. The 1-1/2" drain line was removed and packed inside the dishwasher prior to shipping. Install the drain line once the dishwasher has been placed in its final location. 2. Connect the 1-1/2" NPT drain line to above a drain sink or to a 1-1/2" or larger drain line connection. 3. Observe all local plumbing and sanitary codes when installing. Ventilation Connections 1. DO NOT VENT THE DISHWASHER INTO WALLS, CEILINGS OR ENCLOSED PLACES. 2.
Installation Electrical Connections WARNING: Electrocution or serious injury may result when working on an energized circuit. Disconnect power at the main breaker or service disconnect switch before working on the circuit. Lock-out and tag the breaker to indicate that work is being performed on the circuit.
Installation Electrical Connections (continued) Motor Rotation 1. Motor rotation was set at the factory. 2. The conveyor drive motor rotation is indicated by a red arrow located on the side of the motor. 3. Check if all motors are running in the wrong direction. 4. Reverse the L1 and L2 wires on the output side of the dishwasher Main Terminal Block (MTB) located inside the top-mounted control cabinet. 5. The photograph below shows the conveyor drive motor with its direction arrow. 6.
Installation Chemical Signal Connections 1. Use a qualified detergent/chemical supplier for detergent/chemical and dispensing equipment needs. 2. Labeled detergent control circuit connection terminals are provided in the control cabinet for detergent and rinse agent/sanitizer dispensing equipment (supplied by others). 3. The illustration at right, shows the terminal board for the machine. 4. The signal connection points include: • Detergent signal 120VAC, 1A max load.
Installation Curtain Locations 1. Refer to the illustrations below and hang the curtains as shown. J-hooks are located in the corners of each section to accept the curtain rods. • • • Standard long curtains Standard medium curtains Standard short curtain 24" x 20-1/4" 24" x 13-/14" 24" x 6-1/4" 2. Make sure the that the short flaps of the curtains face the load end of the dishwasher.
Installation Door Safety Switches Dishwasher access doors are equipped with a door safety switch that automatically stops the dishwasher pumps and conveyor drive if a door is raised while the dishwasher is running. In addition, the dishwasher will not start if a door is left open. 1. If the dishwasher is running and a door is raised, then lighted GREEN START pushbutton goes out and the pumps and conveyor drive stop. 2. Check the interior of the dishwasher for any dish racks still in the machine.
Installation Scrap Screens 1. The model MD-44 and the MD-66 have scrap screens in the top of the wash tank. Install four scrap screens in the wash tank making sure they fit securely without large gaps between them. Model MD-44 and MD-66 have four scrap screens in the wash tank. 2. The model MD-66 has a prewash tank containing a single large scrap screen which extends from front to back in the prewash tank. The prewash screen also holds a refuse basket to facillitate cleaning when the machine is off.
Installation Installing the Lower Spray arm Assembly 1. The lower spray arm assembly is connected to the rear wall of the wash tank and locked into place by the spray arm latch. 2. The spray arm o-ring makes a water-tight seal when the latch locks the spray arm. Spray Arm O-ring Spray Arm Guide Lower Spray Arm Latch 3. Slide the lower arm into place and push the latch down to lock the arm in place. 4. The spray pipes are supported on each side by the spray arm guides.
Installation Installing the Upper Spray Arm Assembly The upper wash arm assembly is suspended from the top of the dishwasher hood interior by front and rear supports. Follow the instructions and illustrations below to install the upper wash arm assembly. Wash Arm Connection Flange Pin Connection Flange Rear Support Front Support Upper Wash Arm Assembly Upper wash arm assembly shown installed. (Note that the Wash Arm Connection Flange Pin is seated in the Connection Flange.
Installation Installing the Upper Spray Arm Assembly (continued) 4 Upper Wash Arm Rear Guide Pin 1. Upper Wash Arm Rear Guide Pin The rear guide pin is attached to the rear of the upper wash arm. It mates with the upper wash arm rear support. 2. Connection Flange Pins The connection flange pins are welded to the sides of the upper wash arm. These pins mate with two slots in the connection flange to hold the wash arm in place when installed.
Installation Installing the Upper Spray Arm Assembly Installation Upper Wash Arm Front Supports Upper Wash Arm Rear Support 1. Open the dishwasher access doors and check the location and condition of the connection flange o-ring. Replace the o-ring if it is worn or damaged. 2 1 Connection Flange Upper Wash Arm Assembly The upper wash arm assembly is shown resting on the upper wash arm rear support as it slides toward the connection flange.
Installation Installing the Pawl Bar Pawl Bar Crosshead Brass Crosshead Roller Guide Roller The pawl bar assembly is installed in the center of the dishwasher and moves the dish racks through the machine. To install the pawl bar: 1. Position the pawl bar on the guide rollers located at each end of the machine. 2. Lower the pawl bar so the crosshead fits on top of the brass crosshead roller. 3. The crosshead roller must fit inside the crosshead without binding. 4.
Installation Installing the Curtains Short Curtain J-hook Long Curtain Medium Curtain Curtain Installation Shown at the Final Rinse End of the Dishwasher 1. Curtain are equipped with curtain rods. The rods are hung on J-hooks located in the top of the dishwasher. 2. Make sure that the short flaps on the curtains face the load end of the dishwasher. 3. Refer to page 15, Curtain Locations, for additional information on curtain placement.
Initial Start-Up Check list 1. Remove white protective film from the dishwasher exterior. 2. Install lower panels to the dishwasher. 3. Remove any foreign material from inside of the machine. 4. Check dishwasher drain/overflows are closed and in securely seated. 5. Install scrap screens, spray arms and pawl bar. 6. Turn main utilities to the dishwasher ON. (Power, water). 7. Make sure doors are closed. 8. Turn dishwasher power switch ON. 9. Check tank water temperatures reach proper levels. 10.
Operation Control Panel Operation The final rinse pressure gauge is located behind the control panel. The top-mounted control panel contains the Power ON/OFF switch, start push button, stop push button, and the water temperature gauges for the wash tank and the final rinse. The function of these controls are: A Final Rinse Pressure Gauge - Indicates the flowing water pressure during the final rinse. Proper reading is 20-22 PSI. B Power Switch - Turns power on and off to the dishwasher.
Operation Operation 1. Check that the spray pipes, curtains, and scrap screens are in place and clean. 2. Check that the overflow drains are closed. 3. Check the chemical supplies. Turn on the detergent dispenser switches. 4. Turn on the exhaust vent system (if applicable), and make sure it is operating. 5. Close the door(s). Push the power switch ON, light will illuminate. Machine will begin to fill via the fill valve and the final rinse piping. 6.
Cleaning Cleaning Cleaning your dishwasher is the best maintenance you can do. The cleaning intervals below are the minimum requirements for most dishwashers. You may need to clean your dishwasher more often when washing heavily soiled wares or during long hours of continuous operation. O-ring Remove the wash arm end caps and flush the spray arm pipes with fresh water to clean the spray arm assemblies. Daily or every 2 hours of operation 1. 2. Turn power switch to OFF.
Cleaning Cleaning (continued) At the End of the Day 1. Perform Steps 1-10 on the previous page. 2. Remove the upper and lower rinse and wash spray arms and end plugs and flush with fresh water. 3. Clean the final rinse arm nozzles using a small paper clip. 4. Remove the curtains and clean with fresh water. DO NOT USE STEEL WOOL TO CLEAN THE INTERIOR OF THE MACHINE. Wipe the interior and exterior of the machine with a soft cloth and a mild detergent.
Maintenance Maintenance Weekly 1. Inspect all water lines for leaks and tighten at joints if required. 2. Clean any detergent residue from the exterior of the machine. 3. Check that the drain/overflow pipes seat tightly in their drains. 4. Clean any accumulated scale from the heating element. 5. Inspect the spray arms for any damage or missing parts. 6. Inspect the final rinse arms for missing parts. 7. Inspect the pawl bar and drive assembly for damage or missing parts. 8.
Troubleshooting Before calling for service check the following conditions. 1. Dishwasher main power and water supply is on. 2. Machine has been assembled correctly. 3. Conveyor is clear of any obstructions. 4. Drains are closed. 5. Screens and pump intake screens are clear. 6. Doors are closed and secure. Condition Cause Solution Dishwasher will not run. Door not closed. Main power OFF. Dishwasher OFF. Dish rack inserted wrong Close door completely. Check breaker on panel. Turn dishwasher ON.
Service Replacement Parts Illustrations Page Control Panel ................................................................................................................................................ 32 Control Cabinet............................................................................................................................................. 34 Extended Vent Cowls ...........................................................................................................................
Control Panel 1 2 12 11 10 8 9 9 7 8 1 5 3 5 6 32 4
Control Panel Item No. Part No. 1 100097 SCREW, TRUSS HD., 10-32 X 1/2" SST 3 2 333533 COVER, CONTROL CABINET 1 3 114768 DECAL 36" CONTROL CABINET 3-HOLE, PW-W-R 1 4 114767 DECAL 36" CONTROL CABINET 2-HOLE, W-R (not shown) 1 5 107440 THERMOMETER, 8FT. FLANGE (Qty. 1 MD44) (Qty. 3 MD66) 6 113622 THERMOMETER, 4FT. GAS FILLED (Qty. 1 MD44 Only) 1 7 114758 PUSHBUTTON, RED SQUARE 1 8 0512217 HOUSING, SWITCH 2 9 0512216 CONTACT BLOCK, N.O.
34 SIGNAL ONLY 17 1 TABLE LIMIT SWITCH MACHINE RUNNING 2 16 4 3 18 24 19 5 25 27 26 20 6 15 7 14 8 9 21 10 11 22 11 12 11 23 13 Control Cabinet
Control Cabinet Item No. 1 2 3 4 --5 6 --7 --8 --9 10 11 12 13 --14 15 16 17 18 19 20 21 --22 ----23 ----------24 25 26 27 Part No.
Extended Vent Cowls 6 9 4 5 3 7 2 1 8 36
Extended Vent Cowls Item No. Part No. 1 100073 SCREW, 1/4-20 X 1/2" TRUSS HD., SST 6 2 106026 WASHER, 1/4" FLAT 6 3 106482 WASHER, LOCK 1/4" SPLIT 6 4 106014 NUT, ACORN 1/4-20 6 5 333092 SPLASH SHIELD, VENT 8" EXTENDED (MD44, MD66) 1 6 201589 DAMPER REGULATOR ASSY. 1 7 113828 ROD, CURTAIN 5/16" X 21-1/2" SST 1 8 114622 CURTAIN, 21-3/4" X 13-1/4" 1 9 401487 VENT STACK 4" X 16" 1 Description Qty.
Wash Tank Door, Panels and Curtains 16 17 13 4 18 4 18 7 17 21 14 19 18 20 25 8 10 15 22 20 9 12 23 2 1 6 5 22 (L-R Direction Shown) 11 1 38 24 19 3
Wash Tank Door, Panels and Curtains Item No. Part No. Description Qty. 1 100212 SCREW, 10-32 X 3/4" TRUSS HD. 4 2 108250 ROD, CURTAIN 1 3 109723 CURTAIN, 24" X 6-1/4" (RINSE CURTAIN) 1 4 113691 GUIDE, U-CHANNEL, DOOR 2 5 113720 CURTAIN, 24" X 20-1/4" 2 6 113828 ROD, CURTAIN, 5/16" DIA. X 21-1/2" LG.
Wash Tank Heat, Float Switch, and Scrap Screens 26 27 25 22 21 28 20 21 (L-R Direction Shown) 28 16 19 18 2 14 12 17 See Next Page 7 5 2 8 C H 11 10 40 23 15 24 14 29 To Booster H C 1 6 4 H = High-Limit Thermostat C = Control Thermostat 9 4 13 3
Wash Tank Heat, Float Switch, and Scrap Screens Item No. Part No. Description Qty. 1 100154 HEX PLAIN NUT, 5/16-18 SST 4 2 100547 LOCKNUT, 1/2" NPT SST 3 3 100740 BOLT, HEX HD.
Wash Tank Junction Box Terminal Block 1 5 6 4 3 2 1 7 42
Wash Tank Junction Box Terminal Block Item No. Part No. 1 114519 END BLOCK, E/NS 35N 2 2 114514 TERMINAL, SINGLE, ST 2.5 WH (WHITE) 1 3 114517 TERMINAL, DOUBLE STTB 2.5 4 4 114512 TERMINAL, SINGLE ST 2.5 (GRAY) 2 5 114513 TERMINAL, SINGLE, ST 2.5 BU (BLUE) 6 6 114516 END COVER, SINGLE TERMINAL D-ST 2.5 1 7 114518 END COVER, DOUBLE TERMINAL D-STTB 2.5 1 Description Qty.
MD-66 Prewash Tank, Door and Curtains 16 13 15 19 17 18 12 22 20 21 12 14 22 23 24 19 1 26 8 28 27 23 10 29 9 11 6 7 3 5 14 L-R Direction Shown 44 25 4 2 31 30
MD-66 Prewash Tank, Door and Curtains Item No. Part No. Description Qty. 1 100547 LOCKNUT, 1/2" NPT SST 1 2 102376 WASHER, FLAT 5/16" 3 12 108250 ROD, CURTAIN 1 3 104882 WASHER, FLAT .531" X 1.06" X .
Fill Piping 6 16 4 MD-66 Prewash Fill Only 13 MD-44 Fill 1 30 29 6 22 14 28 29 5 26 24 3 7 3 27 17 10 2 12 18 From Booster Outlet (R-L Direction Shown) To Booster Inlet 31 Main Water Connection 3 3 8 9 30 21 3 11 15 5 17 7 16 4 18 23 19 5 33 20 21 46 9 12 26 11 15 26 32 25
Fill Piping Item No. 1 2 3 4 5 6 --7 8 9 10 11 12 --13 14 15 16 17 18 19 20 21 22 23 --24 25 26 27 28 ----29 ----30 31 32 33 Part No. 100135 100171 100184 100206 100209 100500 900836 100571 100599 100709 101259 101397 207082 207036 102388 102392 102435 102438 102442 102444 102470 102505 102525 102549 104429 900837 105976 107550 109879 110768 111437 109903 111472 109886 109902 108516 201029 206383 333654 114384 Description GAUGE, PRESSURE 0-60 PSI BUSHING, RED.
Final Rinse Piping 1 2 6 7 4 5 3 4 5 48
Final Rinse Piping Item No. Part No. Description Qty.
MD-66 Prewash Spray Arms 8 5 3 8 1 6 13 Rear of Hood 9 10 12 50 4 7 2 11 14
MD-66 Prewash Spray Arms Item No. Part No. Description Qty. 1 100154 HEX PLAIN NUT, 5/16-18 SST 4 2 100734 BOLT, HEX HEAD, 1/4-20 SST 4 3 102376 WASHER, FLAT 5/16" SST 4 4 106026 WASHER, FLAT 1/4" SST 4 5 106013 WASHER, LOCK 5/16" SST 4 6 106014 HEX ACORN PLAIN NUT, 1/4-20 SST 4 7 106482 WASHER, LOCK 1/4" SPLIT SST 4 8 108345 GASKET, HEATER/STANDPIPE 2 9 111532 O-RING 1 10 333105 UPPER WASH SUPPORT ROD WELDMENT, MT-RACK 2 11 333460 FLANGE WELDMENT, WASH SYS.
MD-44, MD-66 Wash Spray Arms 7 7 6 4 10 2 12 17 20 16 4 10 8 20 8 19 4 14 20 19 2 18 11 15 9 17 3 1 52 13 Rear of Hood 8 6
MD-44, MD-66 Wash Spray Arms Item No. Part No. Description Qty.
MD-44 Track Assembly 16 15 1 7 (L-R Direction Shown) 2 5 7 6 13 12 7 14 10 3 11 8 9 11 54 4 8
MD-44 Track Assembly Item No. Part No. Description Qty. 1 100734 BOLT, HEX HD., 1/4-20 X 1/2" SST 8 2 100735 BOLT, HEX HD., 1/4-20 X 5/8" SST 8 3 100736 BOLT, HEX HD.
MD-66 Track Assembly 16 15 1 18 7 6 7 11 3 5 5 17 12 (L-R Direction Shown) 6 14 7 10 9 13 56 1 4 8 2 7 5
MD-66 Track Assembly Item No. Part No. Description Qty. 1 100734 BOLT, HEX HD., 1/4-20 X 1/2" SST 8 2 100735 BOLT, HEX HD., 1/4-20 X 5/8" SST 8 3 100736 BOLT, HEX HD.
MD-44 Pawl Bar Assembly 1 2 3 2 5 1 4 6 14 7 15 12 4 13 10 15 11 9 6 12 9 8 21 16 6 9 16 17 20 10 16 19 58 6 9 18
MD-44 Pawl Bar Assembly Item No. Part No. Description Qty. 1 100141 HEX GRIP NUT, 1/4-20 SST CTR LOCK 9 2 114824 SPACER, PAWL BAR 10 3 204513 PAWL, CRADLE 5 4 100002 BOLT, 1/4-20 X 1-3/8" SST 9 5 334768 PAWL BAR DEVP.
MD-66 Pawl Bar Assembly 1 2 3 2 4 (L-R Direction Shown) 1 5 6 4 15 7 12 8 13 16 14 11 18 20 16 12 21 6 16 9 20 10 22 6 9 60 18 10 19 6 9 17
MD-66 Pawl Bar Assembly Item No. Part No. Description Qty.
Drive Motor Assembly 3 1 15 16 7 7 2 4 13 5 13 15 11 7 11 17 9 12 6 8 10 14 62
Drive Motor Assembly Item No. Part No. Description Qty. 1 0509199 DRIVE MOTOR SWITCH 1 2 327918 BRACKET, MOTOR SWITCH MOUNTING 1 3 113893 SHEAVE, MOTOR AK51, 5/8" BORE 1 4 327916 PLATE, DRIVE MOTOR TORQUE 1 5 327920 BRACKET, 44 MOTOR ASSY. MOUNTING 1 6 327919 BRACKET, MOTOR SPRING MOUNTING 1 7 106482 WASHER, LOCK 1/4" SPLIT SST 4 8 102376 WASHER, FLAT 5/16" SST 2 9 113702 SPRING, 0.06" OD X 0.095" WIRE X 1.5" LG.
Conveyor Drive Assembly 10 11 1 2 3 12 4 13 5 19 6 7 8 9 18 Tank Bottom 21 14 20 22 15 23 19 16 24 20 21 17 24 25 64
Conveyor Drive Assembly Item No. Part No. Description Qty. 1 202381 ROLLER, CROSSHEAD 1 2 100868 STUD, CROSSHEAD ROLLER 1 3 107089 NUT, JAM 1/2-13 1 4 206300 CRANK, RACK ARM 1 5 206301 SHAFT, 5/8" OD X 9" LG.
Pump/Motor Assembly 1 2 3 66
Pump/Motor Assembly Item No. 1 Part No. 114347 Description PUMP/MOTOR ASSEMBLY (INCLUDES ITEMS 2-3) Qty. 1 208-240/460/60/3 2HP 2 108002 PUMP SEAL ASSEMBLY 1 3 114793 IMPELLER, 3.
MD-44 Pump Installation 10 13 17 11 12 3 8 15 18 Wash 5 5 4 4 9 6 4 1 16 14 2 7 68 1 6 3
MD-44 Pump Installation Item No. Part No. Description Qty. 1 100154 HEX PLAIN NUT, 5/16-18 SST 8 2 100739 BOLT, HEX HD., 5/16-18 X 3/4" SST 4 3 100740 BOLT, HEX HD.
70 Prewash 12 4 3 10 1 8 6 13 4 6 1 4 5 21 3 20 8 19 9 5 4 4 6 1 3 2 Wash 6 14 12 10 16 13 5 11 9 5 1 18 6 8 4 4 15 3 17 MD-66 Pump Installation
MD-66 Pump Installation Item No. Part No. Description Qty. 1 100154 HEX PLAIN NUT, 5/16-18 SST 16 2 100739 BOLT, HEX HD., 5/16-18 X 3/4" SST 4 3 100740 BOLT, HEX HD.
Electric Booster Assembly - 40°F and 70°F Rise To Final Rinse 25 22 4 24 (L-R Direction Shown) 2 Water Inlet 6 5 4 19 17 23 3 8 16 4 9 1 22 7 20 21 18 9 13 11 12 72 10 15 14
Electric Booster Assembly - 40°F and 70°F Rise Item No. Part No. Description Qty.
MD-44 Drain Assembly Model 20 30 3 31 (L-R Direction Shown) 25 29 10 5 12 7 6 14 26 4 23 27 21 18 24 19 11 9 11 15 11 9 2 10 1 74 16 17 22 13 24 28 8
MD-44 Drain Assembly Item No. Part No. Description Qty. 1 100036 TEE, 1-1/2" NPT GALVANIZED 1 2 100043 NIPPLE, 1-1/2" NPT X CLOSE, GALVANIZED 1 3 100113 CAP, 3/4" NPT SST 1 4 100735 BOLT, HEX HD., 1/4-20 X 5/8" SST 2 5 100736 BOLT, HEX HD., 1/4-20 X 3/4" SST 4 6 102376 WASHER, FLAT 5/16" SST 4 7 102443 ELBOW, 3/4" NPT X 90° SST 1 8 102505 PLUG, 3/4" NPT SQ. HD.
MD-66 Drain Asssembly 31 31 36 37 13 8 5 3 7 20 2 32 23 13 1 10 14 12 29 13 18 21 28 32 1 23 15 26 24 2 33 16 27 5 25 76 17 6 8 1 4 20 (L-R Direction Shown) 24 13 25 30 35 18 21 33 9 6 27 34 19 22 15 11
MD-66 Drain Assembly Item No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 Part No.
Dish racks 2 1 78
Dish racks Item No. Part No. Description Qty.
Blank Page This Page Intentionally Left Blank 80
Rack Control Module Operation and Electrical Schematics 81
Rack Control Module (RCM) Electrical Schematic 702260 — RCM Inputs H1 RCM Sections Pause Power Stop Start H3 Table Limit H5 H1 Output Section Jam Switch Input Section Refer to the illustration of the Rack Control Module (RCM) to the left and note the three outlined sections.
Rack Control Module (RCM) Operation Rack Control Module (RCM) Operation Input Section Red Indicator Lights The operation of the dishwasher and the RCM is apparent by observing the status of the indicator lights mounted on the RCM and the functioning of the dishwasher. The explanation of the RCM is given below. ON when the table limit switch is closed (The table limit switch is not activated). Jam Switch - ON when the jam switch is closed (The jam switch is not activated).
Rack Control Module Operation Rack Control Module (RCM) Operation Output Section Output Section Green Indicator Lights H1 NOTE: Whenever a Green output light is ON it means that the RCM is providing a signal to enable its corresponding circuit; however, the actual operation of the circuit may depend on other associated controls. Run Light - ON when the start switch on the dishwasher front control panel is pressed. The run light on the dishwasher front panel is also comes on.
Rack Control Module Operation Rack Control Module (RCM) Operation RCM Timer Operation The timer controls the drive motor, wash pump and the MD-66 prewash pump. The timer is internal to the RCM. The PUMPS output indicator light shows the RCM Timer is active. The timer output comes on when the rack switch opens, this turns on the PUMPS output. When the rack switch closes the timer counts for 90-seconds. After 90-seconds, the PUMPS output is turned off.
Rack Control Module Operation Rack Control Module (RCM) Indicator Lights Normal Operation Sequence Pause Power H1 Stop Start H3 Table Limit H5 Jam Switch The following illustration Plates show the condition of the indicator lights (On or Off) during the normal operation of the dishwasher. All lights are off when the dishwasher power is turned off. Plate 1: 4. Floats down. 5. Initial fill begins. Rack Switch Final Rinse Wash Flt U Final Rinse Wash Flt L Prewash Flt U DR Level 3.
Rack Control Module Operation 5. Tank heat enabled. 6. Booster heat enabled. Run Light Rack Switch Final Rinse Wash Flt U Final Rinse Wash Flt L Prewash Flt U DR Level 4. Tanks full. NOT USED Rinse Flt U 3. Floats up. NOT USED Rinse Flt L 2. POWER light ON. Prewash Flt L 1. Doors closed. Pause Power START light comes on when pressed and goes out when it is released.
Rack Control Module Operation Normal Operation Sequence 2. POWER light ON. H1 Pause Power H3 Stop Start H5 Table Limit 1. Doors closed. Jam Switch Plate 5: 3. Floats up. Run Light Rack Switch Final Rinse Wash Flt U Wash Flt L Prewash Flt U Prewash Flt L Prewash Fill = Indicator ON Rinse Aid = Indicator OFF Pumps PUMPS light ON shows the pumps are enabled and the RCM Timer is counting for 90 seconds. H4 Booster Heat H7 Wash Heat RCM Status/Jumpers Run Digital Display Rinse 11.
Rack Control Module Operation Door Opened while Dishwasher is In-cycle Tank heat ON. 7. Booster heat ON. 8. Pumps and drive disabled. 9. RCM timer paused for a maximum of 5 minutes. After 5 minutes, the machine stops and the START push button must be pressed to operate the dishwasher. 10. De-activating the table limit switch before 5 mins. has elapsed will resume operation where it left off. RUN LIGHT ON. TABLE LIMIT ON. Stop Start Pause Power Pause Power 6.
Rack Control Module Operation 1. Doors closed. H1 Pause Power H3 Stop Start H5 Table Limit Plate 9: Jam Switch Jam Switch Activated while Dishwasher is In-cycle 2. POWER light ON. Run Light Rack Switch Final Rinse Wash Flt U Wash Flt L Prewash Flt U Prewash Flt L 8. Booster heat disabled. H2 Activating the JAM Switch stops the RCM timer and the machine stops. The RUN LIGHT. The jam condition must be fixed and the START pushbutton must be pressed to operate the dishwasher. 9.
Rack Control Module Operation 1. Door closed. H1 Pause Power H3 Stop Start H5 Table Limit Plate 11: Jam Switch Float Operation During Initial Fill 2. POWER light ON. Run Light 4. Final rinse enabled. 5. Wash fill enabled. Rack Switch Final Rinse Wash Flt U Final Rinse Wash Flt L Prewash Flt U Prewash Flt L DR Level NOT USED Rinse Flt U ALL FLOATS DOWN NOT USED Rinse Flt L 3. Tanks empty. H2 Wash Fill Prewash Fill = Indicator ON Rinse Aid = Indicator OFF 6.
Rack Control Module Operation Pause Power Plate 12: H1 Stop Start H3 Table Limit H5 Jam Switch Front Panel Power Switch Turned Off while Dishwasher is In-cycle 1. Door closed. Run Light 6. Booster heat disabled. 7. Pumps and drive disabled. Rack Switch Final Rinse Wash Flt U Final Rinse Wash Flt L Prewash Flt U DR Level 5. Tank heat Disabled. NOT USED Rinse Flt U 4. Tanks full. NOT USED Rinse Flt L 3. Floats up. Prewash Flt L 2. POWER Switch OFF.
Circuit Board Jumper Settings MD44 = No jumpers installed MD66 = Prewash jumper installed DR Tank & Rinse Tank Jumpers not used 93
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