Simply Engineered Better Technical Manual Undercounter Dishwasher Model 501-HT 501-HTN 501-LT Machine Serial No. July, 2003 P.O. Box 4183 Winston-Salem, North Carolina 27115-4183 Moyer Diebel, U.S. 336/661-1992 Fax: 336/661-1979 Manual P/N 0508576 REV. J 2674 N. Service Road Jordan Station, Ontario, Canada L0R 1S0 Moyer Diebel, Ltd.
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REVISIONS Revision History Revision Date Revised Pages Serial Number Effectivity Comments 12/16/92 All — 8/29/93 18-19 3100 8/29/93 20-21 — 8/29/93 24-25 3210 8/29/93 27 — Added part numbers for valve kit. 8/29/93 30-31 — Changed booster element part numbers. 8/29/93 40-42 — Revised wiring schematics. 6/30/95 28-29 5733 Redesign of inlet chute. 6/30/95 30-31 5713 Redesign of booster assembly.
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CONTENTS CONTENTS Page INTRODUCTION....................................................................................................................................... 1 WARRANTY .............................................................................................................................................. 2 GENERAL .................................................................................................................................................. 3 INSTALLATION ........
CONTENTS Figure 9—Detergent Pump Assembly....................................................................................................... 32 Figure 10—Sanitizer/Rinse-Aid Pump Assembly....................................................................................... 34 Figure 11—Drain Pump Assembly ............................................................................................................. 36 Figure 12—Control Cabinet ............................................................
INTRODUCTION INTRODUCTION Welcome to Moyer Diebel. Thank you for choosing Moyer Diebel and for allowing us to take care of your dishwashing needs. This manual covers several models. Model numbers are shown on the front cover. Your machine has been completely assembled, inspected, and thoroughly tested at our factory to eliminate problems at installation before it was shipped to your installation site.
WARRANTY LIMITED WARRANTY Moyer Diebel, 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.
GENERAL GENERAL This manual covers the Moyer Diebel undercounter dishwashing machine. This machine is fully automatic and is equipped with a 1/2 H.P. pump motor. All models are available for mounting directly to the floor or on optional stands (see accessories listed on page 4).
GENERAL Accessories • 17RS - 17" rack stand (raises working height and adds rack storage) • 17T - 17" cabinet (raises working height and adds storage) • CST - Combination sink/table (scraping and sorting station) • 0501653 - Dish Rack (Peg Rack) • 0501654 - Silverware Rack (Flat Bottom Rack) • 0710364 - 5" Base/Stand Electrical Power Requirements Model Voltage 115/60/1 115/60/1 208/60/1 240/60/1 208/60/1 240/60/1 501LT 501HTN 501HT 501HT 501HT 501HT Booster Rise N/A N/A 40 40 70 70 Machine Full Load Am
INSTALLATION INSTALLATION Unpacking ! WARNING: Care should be taken when lifting the machine to prevent damage. 1. Immediately after unpacking your 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. Adjust the feet if required, then move the machine to its permanent location. 3. Level the machine (if required) by placing a level on the top of the machine and adjusting the feet.
INSTALLATION Plumbing Connections ! CAUTION: Plumbing connections must comply with local sanitary and plumbing codes. Water Connections 1. Connect the hot water supply (60oC/ 140oF Min) to the 1/2" I.D. fill hose. The fill solenoid valve is equipped with a flow control that will accept water pressures from 172 kPa/25 psi to 665 kPa/95 psi. 2. Install a manual shut-off valve in the water supply line to accommodate servicing the machine.
INSTALLATION Completing Installation 1. Remove any foreign material from inside the machine. 2. Center the scrap screen over the sump opening. 3. Prime the booster using the following procedure (if applicable). ! CAUTION: To prime the booster, the following procedure must be followed AFTER the electrical and plumbing connections have been made. a. Close the front door. b. Remove the front panel. c. Locate the Installation and Service toggle switch on the extreme left side of the control box.
OPERATION OPERATION Operation Summary The following is a summary of your Undercounter Dishwashing Machine operating cycle: 1. The cycle begins when you depress the front edge of the door latch toward the door. 2. The green cycle lamp lights and the pump starts. 3. The pump runs during the wash cycle for approximately 80 seconds. The wash cycle duration is extended if booster is not up to temperature. 4. The pump stops, and the drain is opened. 5.
OPERATION NOTE: The machine may be stopped at any time by opening the door. When restarted, the cycle does not start over. It will continue from the point at which it was interrupted. 7. Check the rinse temperature during the final rinse (120 seconds into cycle). The rinse temperature must be 82°C/180°F minimum for models 501HT, 501HTN, 501UT and 501UTLC and 60°C/140°F for models 501LT and 501UTL. 8. The pump will automatically stop and the green cycle light will turn off indicating the cycle is completed.
MAINTENANCE MAINTENANCE The efficiency and life of your machine is increased by regularly scheduled preventive maintenance. A well maintained machine gives better results and service. An investment of a few minutes of daily maintenance will be worthwhile. The best maintenance you can provide is to keep your machine clean. Components that are not regularly cleaned and flushed will clog and become inoperative.
MAINTENANCE Deliming Your dishwasher should be delimed regularly as required. This will depend on the mineral content of your water. Inspect your machine interior for lime deposits. If deliming is required, a deliming agent should be used for best results.
MAINTENANCE Maintenance Schedule • • 12 As Required 1. Check the temperature gauge reading. 2. Check the chemical supplies and refill as necessary. Weekly 1. Inspect all water lines for leaks and tighten them at joints if required. 2. Clean all detergent residue from the exterior of the machine. 3. Check the drain for leaks. 4. Clean accumulated scale from the heating element. 5. Remove and closely inspect each spray arm for blockage. 6. Check for damage to the scrap screen.
TROUBLESHOOTING TROUBLESHOOTING Before determining any specific cause of a breakdown or abnormal operation of your dishwasher, check that: 1. Turn all switches ON, except for the extended wash switch. 2. Wash arms are clean. 3. Scrap screen is properly positioned and clean. 4. Thermostat(s) are at their correct setting. 5. Sanitizer, detergent, and rinse additive dispensers are adequately filled. 6. All plumbing valves are open.
TROUBLESHOOTING TROUBLESHOOTING (con’t) CONDITION 14 CAUSE SOLUTION No water in wash well Opening door prior .............................. to cycle completion Close door. Wait for green cycle light to go out before opening door. No water in wash tank after activating the ON/FILL switch Door not latched .................................. Latch door. Wait for wash tank to fill. Cycle time increases with each cycle Incoming water....................................
REPLACEMENT PARTS REPLACEMENT PARTS 15
REPLACEMENT PARTS 00001 14 13 12 14 9 8 11 6 7 4 3 5 14 2 10 1 Figure 1 — Track and Panel Assembly 16
REPLACEMENT PARTS TRACK/PANEL ASSEMBLY Fig. 1 Item No. 1 2 2 3 4 5 6 7 8 9 10 11 12 13 14 Part No. 0508751 0308615 0308646 0308646 0308748 0501413 0501415 0308632 0308631 0708647 0308736 0308734 0308737 0308735 0501412 Description Screw, 10-32 x 1-1/2" Lg. Truss Head ....................................... Front Panel (HT, HTN, LT) (Prior to S/N 6795) ........................ Front Panel (HT, HTN, LT) (S/N 6795 and above).................... Front Panel (UTL, UT, UT-LC) ..................................
REPLACEMENT PARTS 00020 11 1 4 5 7 8 6 10 12 9 3 1 13 14 2 1 18 15 16 17 Figure 2 — Door Switch Assembly 18 15
REPLACEMENT PARTS DOOR & SWITCH ASSEMBLY (For Machines Beginning with S/N 6984 and Above) Fig. 2 Item No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 - Part No. 0501412 0308596 0308597 0508721 0709462 0509436 0508545 104883 0709431 111090 0508544 0508543 0501539 0503715 0501421 0708564 0501501 0708527 0508555 Description Screw, 10-32 x 3/8" Truss Head ................................................. Plate, Door Latch........................................................................
REPLACEMENT PARTS 00004 1 3 2 3 4 TO RINSE 18 17 16 19 14 15 14 13 11 16 11 10 12 THERMOSTAT (CALLED OUT IN CONTROL BOX) 5 THERMOMETER (CALLED OUT IN CONTROL BOX) 6 7 21 TO DRAIN 19 19 8 20 9 Figure 3 — Tank Heat and Drain 20 TO PUMP DRAIN
REPLACEMENT PARTS TANK HEAT/DRAIN ASSEMBLY Fig. 3 Item No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 Part No. 0508628 0508536 0508537 0508578 0501539 0501501 0308611 0306618 0501418 0508873 0501836 0508872 108954 110562 201029 0308655 0508579 104414 0510082 0507265 0509302 Description Scrap Screen............................................................................... Heater Element 220V-60Hz-1PH (HT, UT, UT-LC).................. Heater Element 110V-60Hz-1PH (HTN, LT, UTL) ............
REPLACEMENT PARTS 00005 1 3 2 4 5 6 7 8 9 10 11 13 14 12 TANK BOTTOM Figure 4 — Pump Assembly 22
REPLACEMENT PARTS PUMP ASSEMBLY Fig. 4 Item No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 - Part No. 0508542 0501431 0501425 0508793 0502741 0502704 0502746 0502745 0502703 0502744 0502743 0501881 0508665 0508570 0710071 107966 Description Spindle, Lower Wash Arm ......................................................... Screw, 8-32 x 1-1/8" Round Head.............................................. Screw, 8-32 x 5/8" Round Head ................................................. Housing, Diffuser ....................
REPLACEMENT PARTS 00006 2 1 3 4 TOP OF HOOD 5 6 7 8 9 10 10 11 12 13 14 PUMP TANK BOTTOM 2 FROM PUMP Figure 5 — Wash System Assembly 24
REPLACEMENT PARTS WASH SYSTEM ASSEMBLY Fig. 5 Item No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 - Part No. 0508549 0502563 0708650 0503588 0501412 0508541 0705047 0505042 0308783 0501563 0308158 0501684 0705049 0508540 0708874 Description Hose, Upper Wash ...................................................................... Clamp, Hose 1"........................................................................... Spindle, Upper Wash Arm..........................................................
REPLACEMENT PARTS 00021 16 WATER CONNECTION 2 16 11 13 10 15 7 12 9 WATER CONNECTION 6 5 7 8 2 4 3 1 2 TO BOOSTER OR FILL Figure 6 — Water Inlet Piping 26
REPLACEMENT PARTS WATER INLET PIPING ASSEMBLY Fig. 6 Item No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Part No. 0503718 0503679 107417 107417 0502653 0504952 0502811 0505235 0504958 0501501 0501419 0300203 0300065 0501424 0503713 0502618 0503679 0509526 0505320 Description Foot, Adjustable ......................................................................... Clamp, Hose ............................................................................... Hose l/2" I.D. (all except HTN) ......................
28 Figure 7 — Fill System Prior to S/N 5733 8 From Sanitizer Rinse-aid Pumps From Detergent Pump 7 4 4 6 (See Corresponding Pump For Hose) 3 9 4 5 RH Side of Tank 2 2 From Top of Booster or From Fill Valve 4 3 Beginning with S/N 5733 & Above 3 10 1 REPLACEMENT PARTS 00018
REPLACEMENT PARTS FILL SYSTEM All Models Fig. 7 Item No. 1 2 3 4 5 6 7 8 9 10 Part No. 107417 0501518 106090 107966 0509048 0508867 0508656 0508609 0501519 107417 Description Hose, 1/2" I.D. (HT, LT, UTL) ................................................... Tie Wrap, Hose........................................................................... Bracket, Tie Wrap ...................................................................... Nut, Grip, 10-32 w/Nylon Insert ........................................
30 18 21 19 20 18 22 23 17 24 25 6 5 9 2 LVE FILL VA M SYSTE FROM TO FILL 26 23 10 1 1 4 11 8 3 7 4 3 12 13 14 6 15 16 15 THERMOSTAT (CALLED OUT IN CONTROL BOX) 00017 REPLACEMENT PARTS Figure 8 — Booster Assembly
REPLACEMENT PARTS BOOSTER ASSEMBLY (Includes Models HT, UT, UT-LC) Fig. 8 Item No. 1 2 3 4 5 6 7 8 9 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 - Part No. 0503679 107417 0502653 0508840 0501419 0501501 108954 110562 0508779 0509042 107417 0508709 109985 111233 111235 0501539 107908 0308638 0501533 0501472 0501493 0501403 107964 0501412 0504538 0504951 0308627 110997 0307356 0508397 Description Clamp, Hose ...............................................................................
REPLACEMENT PARTS 00022 1 3 2 4 6 7 8 5 12 13 9 14 15 10 11 TO FILL ASSY 16 16 17 18 22 19 20 21 TO DETERGENT SUPPLY Figure 9 — Detergent Pump Assembly 32 22
REPLACEMENT PARTS DETERGENT PUMP ASSEMBLY All Models Fig. 9 Item No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 - Part No. 0503757 0308637 0308610 N/A 0501412 N/A 0501497 0504822 0501425 N/A N/A 108194 N/A N/A N/A 0501519 0502667 0502644 0503695 0306363 0501869 0501519 Description Motor, Pump............................................................................... Bracket, Detergent Pump (all except LT)................................... Bracket, Detergent/Sanitizer Pumps (LT) .......
REPLACEMENT PARTS 00002 1 3 2 5 6 7 8 4 15 9 10 DETERGENT PUMP (SEE FIG.
REPLACEMENT PARTS SANITIZER/RINSE AID PUMP LT/UTL Fig. 10 Item No. 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Part No. 0503756 0308610 0308697 0501412 0501497 0504822 0707142 0706635 0506589 0502666 0503694 0505483 0306363 0501869 0501519 - 0708561 Detergent/Sanitizer Pump Assy. (LT)......................................... (lncludes Detergent Pump and Items 1,2, 5-9) - 0708754 Rinse-Aid Pump Assy. (Optional) (Includes Items 1,3-10, 12-15) 1 Description Qty Motor, Pump....................................
REPLACEMENT PARTS 00003 1 2 3 TO DRAIN 11 12 14 5 13 6 7 8 12 9 10 FROM DRAIN VALVE 11 Figure 11 — Drain Pump Assembly 36 4
REPLACEMENT PARTS DRAIN PUMP ASSEMBLY 501 UTL, UT-LC Fig. 11 Item No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 - Part No. 0308119 0501419 0501501 N/A N/A 0508370 0508369 0508368 N/A 0508141 0507265 0503679 0508139 0508140 Description Bracket, Pump Hold Down ........................................................ Bolt, 1/4-20 x 1/2" Lg. Hex Head .............................................. Washer, Lock 1/4" Split.............................................................. Motor, Pump.........................
REPLACEMENT PARTS Figure 12 — Control Cabinet 38
REPLACEMENT PARTS CONTROL CABINET ASSEMBLY HT, HTN, LT, UTL, UT, UT-LC Fig. 12 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.
REPLACEMENT PARTS CONTROL CABINET ASSEMBLY (cont’d) HT, HTN, LT, UTL, UT, UT-LC Fig. 12 Item No. 38 39 40 41 42 43 44 45 46 47 48 49 50 - 40 Part No. 0503701 0501292 112185 — — 0309433 0509428 0501408 0501538 0508572-1 111069 0501412 0710583 Description 0308641-1 Bearing, Timer Shaft .................................................................. Power Cord (HTN, LT, UTL) (Not Shown) ............................... Bracket, Ranco thermostat .........................................................
ELECTRICAL SCHEMATICS ELECTRICAL SCHEMATICS 41
ELECTRICAL SCHEMATICS Figure 13 - Electrical Diagram, 501-HT (For machines Beginning with S/N W7604) 42
;;;;;;;;;;;; yyyyyyyyyyyy ;y y; ; y y ; y; ; y;y; y ; y; y ;y y; ; y; y ;y y ; ; y y ;; y; y ; ; y y ;y ELECTRICAL SCHEMATICS yyyyyyyyyyyy ;;;;;;;;;;;; Figure 14 - Electrical Diagram, 501-HT (For machines Ranging from S/N 6984) 43
ELECTRICAL SCHEMATICS ;y y;; y; y;y y; ;y; y; y ;; ;y; yy y ;y; yy ;; y y;y; ; y ; y y ; yy ;; ; y y ; y ; yyyyyyyyyyyy ;;;;;;;;;;;; Figure 15 - Electrical Diagram, 501-HTN (For machines beginning with S/N 6984) 44
ELECTRICAL SCHEMATICS ;y y;;y ; y ;y yy;y;; ; y; y;; y ;y ; yy y y ; ; ;y y; ; yy ; ;y ; y y ; ;y ; y ; y yy ;; y ; ; y Figure 16 - Electrical Diagram, 501-LT (For machines beginning with S/N 6984) 45
ELECTRICAL SCHEMATICS TO CUSTOMER DISCONNECT SWITCH 5 36 32 FUSE 37 XFMR 115 VAC 230V 2 1 SS 00010 38 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 ELECTRICAL CODES.
ELECTRICAL SCHEMATICS 00011 TO CUSTOMER DISCONNECT SWITCH CUSTOMER TO SUPPLY RATED VOLTAGE/PHASE/Hz, AS SPECIFIED 115V NEUTRAL PER ORDER, TO DISCONNECT SWITCH. ALL POWER SUPPLIED TO EACH CONNECTION POINT MUST COMPLY 230V WITH ALL LOCAL ELECTRICAL CODES.
ELECTRICAL SCHEMATICS 00012 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 ELECTRICAL CODES.
ELECTRICAL SCHEMATICS 00013 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 ELECTRICAL CODES.
ELECTRICAL SCHEMATICS 00014 TIMING CHART 501HT CAM TIME IN SECS 1 HOMING CAM 2 WASH PUMP FORWARD=WASH 2 3 0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 WASH PUMP REVERSE=DRAIN WASH PUMP REVERSING CAM DRAIN VALVE 4 DRAIN PUMP OPTIONAL 5 FILL VALVE 6 RINSE PUMP 7 DETERGENT PUMP 8 AUTO-FILL DRAIN 9 RINSE SENTRY OPTIONAL If booster thermostat is calling for heat, cam 9 will pause wash cycle until it reaches 82∞C/180∞F. N O SYNCHRON N C COM.
ELECTRICAL SCHEMATICS 00014 TIMING CHART 501HT CAM TIME IN SECS 1 HOMING CAM 2 WASH PUMP FORWARD=WASH 3 WASH PUMP REVERSE=DRAIN WASH PUMP REVERSING CAM 4 DRAIN VALVE DRAIN PUMP 5 FILL VALVE 6 RINSE PUMP 7 DETERGENT PUMP 8 AUTO-FILL DRAIN 2 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 OPTIONAL N O SYNCHRON N C 0 COM.
ELECTRICAL SCHEMATICS 00015 TIMING CHART 501UT CAM TIME IN SECS 1 HOMING CAM 2 WASH PUMP FORWARD=WASH 3 WASH PUMP REVERSE=DRAIN WASH PUMP REVERSING CAM 4 DRAIN VALVE DRAIN PUMP 5 FILL VALVE 6 RINSE PUMP 7 DETERGENT PUMP 8 AUTO-FILL DRAIN 2 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 OPTIONAL SYNCHRON N C 0 N O COM.
ELECTRICAL SCHEMATICS 00016 TIMING CHART 501LT CAM TIME IN SECS 1 HOMING CAM 2 WASH PUMP FORWARD=WASH 3 WASH PUMP REVERSE=DRAIN WASH PUMP REVERSING CAM 4 DRAIN VALVE DRAIN PUMP 5 FILL VALVE 6 RINSE PUMP 7 SANITIZER PUMP 8 DETERGENT PUMP 9 AUTO-FILL DRAIN 2 10 20 30 40 50 60 70 80 90 100 110 N O 120 130 140 150 SYNCHRON N C 0 COM.
