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Moyer Diebel 501-HT Technical Manual

Undercounter dishwasher
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See also: Operation & Installation Manual , Installation/operation Manual With Service Replacement Parts
Simply Engineered Better
July, 2003
P.O. Box 4183
Winston-Salem, North Carolina 27115-4183
Moyer Diebel, U.S.
336/661-1992
Fax: 336/661-1979
Technical Manual
Undercounter
Dishwasher
Machine Serial No.
P/N
Manual
2674 N. Service Road
Jordan Station, Ontario, Canada L0R 1S0
Model
501-HT
501-HTN
501-LT
0508576
REV. J
Moyer Diebel, Ltd.
905/562-4195
Fax: 905/562-4618

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  • Page 1 Simply Engineered Better Technical Manual Undercounter Dishwasher Model 501-HT 501-HTN 501-LT Machine Serial No. July, 2003 0508576 Manual REV. J P.O. Box 4183 2674 N. Service Road Winston-Salem, North Carolina 27115-4183 Jordan Station, Ontario, Canada L0R 1S0 Moyer Diebel, U.S.
  • Page 2 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 Limited Moyer Diebel, US...
  • Page 3 REVISIONS Revision History Revision Revised Serial Number Comments Date Pages Effectivity 12/16/92 — Reissue of manual and new replacement parts lists. 8/29/93 18-19 3100 Redesign of door catch plunger and housing. 8/29/93 20-21 — Redesign of thermometer fitting. 8/29/93 24-25 3210 Redesign of upper wash arm hub and gasket.
  • Page 4 THIS PAGE INTENTIONALLY LEFT BLANK...

  • Page 5: Table Of Contents

    CONTENTS CONTENTS Page INTRODUCTION............................WARRANTY .............................. GENERAL ..............................INSTALLATION ............................Unpacking ............................Electrical Connections.......................... Plumbing Connections ......................... Detergent .............................. Rinse-Aid ............................. Chemical Sanitizer ..........................Completing Installation ........................OPERATION .............................. Operation Summary ..........................Operation Procedures ........................... Extended Wash Cycle .......................... MAINTENANCE............................10 Cleaning Schedule..........................
  • Page 6 Figure 12—Control Cabinet ........................38 Figure 13—Electrical Diagram, 501-HT (For machines beginning with S/N W7604) ......42 Figure 14—Electrical Diagram, 501-HT (For machines ranging from S/N 6984 to W7604) ....43 Figure 15—Electrical Diagram, 501-HTN (For machines beginning with S/N 6984) ....... 44 Figure 16—Electrical Diagram, 501-LT (For machines beginning with S/N 6984) ........

  • Page 7: Introduction

    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.

  • Page 8: Warranty

    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. Warranty of Machines: Moyer Diebel warrants all new machines of its manufacture bearing the name “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 Moyer Diebel, whichever occurs first.

  • Page 9: General

    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). Standard equipment includes: -Automatic tank fill -Upper and lower wash/rinse arms...
  • Page 10 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) •...

  • Page 11: Installation

    INSTALLATION INSTALLATION Unpacking WARNING: Care should be taken when lifting the machine to prevent damage. Immediately after unpacking your machine, inspect for any shipping damage. If damage is found, save the packing material and contact the carrier immediately. Remove the dishwasher from the skid. Adjust the feet if required, then move the machine to its permanent location.

  • Page 12: Plumbing Connections

    INSTALLATION Plumbing Connections CAUTION: Plumbing connections must comply with local sanitary and plumbing codes. Water Connections Connect the hot water supply (60 C/ 140 F 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.

  • Page 13: Completing Installation

    INSTALLATION Completing Installation Remove any foreign material from inside the machine. Center the scrap screen over the sump opening. 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.

  • Page 14: Operation

    OPERATION OPERATION Operation Summary The following is a summary of your Undercounter Dishwashing Machine operating cycle: The cycle begins when you depress the front edge of the door latch toward the door. The green cycle lamp lights and the pump starts. The pump runs during the wash cycle for approximately 80 seconds.

  • Page 15: Extended Wash Cycle

    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.

  • Page 16: Maintenance

    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.

  • Page 17: Deliming

    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. If you have the chemical sanitizing model (501LT or 501UTL), carefully follow the following procedure before deliming: DANGER:...

  • Page 18: Maintenance Schedule

    MAINTENANCE Maintenance Schedule • As Required Check the temperature gauge reading. Check the chemical supplies and refill as necessary. • Weekly Inspect all water lines for leaks and tighten them at joints if required. Clean all detergent residue from the exterior of the machine. Check the drain for leaks.

  • Page 19: Troubleshooting

    TROUBLESHOOTING TROUBLESHOOTING Before determining any specific cause of a breakdown or abnormal operation of your dishwasher, check that: Turn all switches ON, except for the extended wash switch. Wash arms are clean. Scrap screen is properly positioned and clean. Thermostat(s) are at their correct setting. Sanitizer, detergent, and rinse additive dispensers are adequately filled.
  • Page 20 TROUBLESHOOTING TROUBLESHOOTING (con’t) CONDITION CAUSE SOLUTION No water in wash well Opening door prior ......Close door. Wait for green cycle light to cycle completion to go out before opening door. No water in wash tank Door not latched ........Latch door.

  • Page 21: Replacement Parts

    REPLACEMENT PARTS REPLACEMENT PARTS...

  • Page 22: Figure 1-Track And Panel Assembly

    REPLACEMENT PARTS 00001 Figure 1 — Track and Panel Assembly...
  • Page 23 REPLACEMENT PARTS TRACK/PANEL ASSEMBLY Fig. 1 Part Description Item No. 0508751 Screw, 10-32 x 1-1/2" Lg. Truss Head ........0308615 Front Panel (HT, HTN, LT) (Prior to S/N 6795) ......0308646 Front Panel (HT, HTN, LT) (S/N 6795 and above)....0308646 Front Panel (UTL, UT, UT-LC) ..........

  • Page 24: Figure 2-Door And Switch Assembly

    REPLACEMENT PARTS 00020 Figure 2 — Door Switch Assembly...
  • Page 25 REPLACEMENT PARTS DOOR & SWITCH ASSEMBLY (For Machines Beginning with S/N 6984 and Above) Fig. 2 Part Description Item No. 0501412 Screw, 10-32 x 3/8" Truss Head ..........0308596 Plate, Door Latch................ 0308597 Handle, Door Latch ..............0508721 Retaining Ring, Plunger ............. 0709462 Assembly, Door Catch (Includes items 4, 6) ......

  • Page 26: Figure 3-Tank Heat And Drain

    REPLACEMENT PARTS 00004 TO RINSE THERMOSTAT (CALLED OUT IN CONTROL BOX) THERMOMETER (CALLED OUT IN CONTROL BOX) TO PUMP DRAIN TO DRAIN Figure 3 — Tank Heat and Drain...

  • Page 27: Tank Heat/Drain Assembly

    REPLACEMENT PARTS TANK HEAT/DRAIN ASSEMBLY Fig. 3 Part Description Item No. 0508628 Scrap Screen................0508536 Heater Element 220V-60Hz-1PH (HT, UT, UT-LC)....0508537 Heater Element 110V-60Hz-1PH (HTN, LT, UTL) ....0508578 Adapter, Pump Tube..............0501539 Nut, Plain 1/4-20 ................ 0501501 Washer, Lock, 1/4" Split............. 0308611 Support, Drain Valve ..............
  • Page 28 REPLACEMENT PARTS 00005 TANK BOTTOM Figure 4 — Pump Assembly...

  • Page 29: Figure 4-Pump Assembly

    REPLACEMENT PARTS PUMP ASSEMBLY Fig. 4 Part Description Item No. 0508542 Spindle, Lower Wash Arm ............0501431 Screw, 8-32 x 1-1/8" Round Head..........0501425 Screw, 8-32 x 5/8" Round Head ..........0508793 Housing, Diffuser ............... 0502741 Diffuser..................0502704 Impeller ..................0502746 Adapter Plate, Suction..............
  • Page 30 REPLACEMENT PARTS 00006 TOP OF HOOD PUMP TANK BOTTOM FROM PUMP Figure 5 — Wash System Assembly...

  • Page 31: Figure 5-Wash System Assembly

    REPLACEMENT PARTS WASH SYSTEM ASSEMBLY Fig. 5 Part Description Item No. 0508549 Hose, Upper Wash ..............0502563 Clamp, Hose 1"................0708650 Spindle, Upper Wash Arm............0503588 O-ring, 1-1/8" x 1-3/8" ............... 0501412 Screw, 10-32 x 3/8" Lg. Truss Head........... 0508541 Bushing, Upper Wash Arm............
  • Page 32 REPLACEMENT PARTS 00021 WATER CONNECTION WATER CONNECTION TO BOOSTER OR FILL Figure 6 — Water Inlet Piping...

  • Page 33: Figure 6-Water Inlet Piping

    REPLACEMENT PARTS WATER INLET PIPING ASSEMBLY Fig. 6 Part Description Item No. 0503718 Foot, Adjustable ................. 0503679 Clamp, Hose ................107417 Hose l/2" I.D. (all except HTN) ..........107417 Hose 1/2" I.D. (HTN)..............0502653 Elbow, 3/8 MPT x 1/2" Hose x 90° Brass ........0504952 Valve, Solenoid 3/8 NPT ............
  • Page 34 REPLACEMENT PARTS 00018 Figure 7 — Fill System Figure 7 — Fill System...

  • Page 35: Figure 7-Fill System

    REPLACEMENT PARTS FILL SYSTEM All Models Fig. 7 Part Description Item No. 107417 Hose, 1/2" I.D. (HT, LT, UTL) ........... 0501518 Tie Wrap, Hose................106090 Bracket, Tie Wrap ..............107966 Nut, Grip, 10-32 w/Nylon Insert ..........0509048 Gasket, Inlet Chute (Beginning with S/N 5733 & above)..0508867 Inlet Chute (Beginning with S/N 5733 &...
  • Page 36 REPLACEMENT PARTS Figure 8 — Booster Assembly...

  • Page 37: Figure 8-Booster Assembly

    REPLACEMENT PARTS BOOSTER ASSEMBLY (Includes Models HT, UT, UT-LC) Fig. 8 Part Description Item No. 0503679 Clamp, Hose ................107417 Hose, 1/2" I.D. (42") ..............3 ft. 0502653 Elbow, 3/8 MPT x 1/2" Hose x 90° Brass ........0508840 Bushing, Reducing 3/4 NPT x 3/8 NPT Brass ......0501419 Bolt, 1/4-20 x 1/2"...

  • Page 38: Figure 9—Detergent Pump Assembly

    REPLACEMENT PARTS 00022 TO FILL ASSY TO DETERGENT SUPPLY Figure 9 — Detergent Pump Assembly...

  • Page 39: Detergent Pump Assembly

    REPLACEMENT PARTS DETERGENT PUMP ASSEMBLY All Models Fig. 9 Part Description Item No. 0503757 Motor, Pump................0308637 Bracket, Detergent Pump (all except LT)........0308610 Bracket, Detergent/Sanitizer Pumps (LT) ........Screw, M4 x 35mm Hex Head ........... 0501412 Screw, 10-32 x 3/8" Lg. Truss Head........... Housing, Pump ................

  • Page 40: Figure 10—Sanitizer/Rinse-Aid Pump Assembly

    REPLACEMENT PARTS 00002 TO FILL DETERGENT SYSTEM PUMP (SEE FIG. 9) TO CHEMICAL SUPPLY Figure 10 — Sanitizer/Rinse Aid Pump Assembly...
  • Page 41 REPLACEMENT PARTS SANITIZER/RINSE AID PUMP LT/UTL Fig. 10 Part Description Item No. 0503756 Motor, Pump................0308610 Bracket, Detergent/Sanitizer Pump (LT) ........0308697 Bracket, Rinse-Aid Pump (Optional) ......... 0501412 Screw, 10-32 x 3/8" Lg. Truss Head........... 0501497 Washer, Lock #8 Split ..............0504822 Screw, 8-32 x 1/2"...

  • Page 42: Figure 11—Drain Pump Assembly

    REPLACEMENT PARTS 00003 TO DRAIN FROM DRAIN VALVE Figure 11 — Drain Pump Assembly...

  • Page 43: Drain Pump Assembly

    REPLACEMENT PARTS DRAIN PUMP ASSEMBLY 501 UTL, UT-LC Fig. 11 Part Description Item No. 0308119 Bracket, Pump Hold Down ............0501419 Bolt, 1/4-20 x 1/2" Lg. Hex Head ..........0501501 Washer, Lock 1/4" Split.............. Motor, Pump................Backing Plate, Pump ..............0508370 Gasket, Pump Volute ..............

  • Page 44: Figure 12—Control Cabinet

    REPLACEMENT PARTS Figure 12 — Control Cabinet...
  • Page 45 REPLACEMENT PARTS CONTROL CABINET ASSEMBLY HT, HTN, LT, UTL, UT, UT-LC Fig. 12 Part Description Item No. 0512107 Thermometer, 4Ft. Gas Filled (Replaces 108391) ............1 0508551 Lamp, Green........................ 1 0508522 Decal, Control Panel (All except LT, UTL)..............1 0508553 Decal, Control Panel (LT, UTL) .................
  • Page 46 REPLACEMENT PARTS CONTROL CABINET ASSEMBLY (cont.d) HT, HTN, LT, UTL, UT, UT-LC Fig. 12 Part Description Item No. 0503701 Bearing, Timer Shaft ....................1 0501292 Power Cord, (HTN, LT, UTL) Not Shown ..............1 112185 Bracket, Thermostat ....................1 ---------- Sheetmetal Screw, #8 x 3/16"...
  • Page 47 ELECTRICAL SCHEMATICS ELECTRICAL SCHEMATICS...

  • Page 48: Electrical Diagrams

    ELECTRICAL SCHEMATICS Figure 13 - Electrical Diagram, 501-HT (For machines Beginning with S/N W7604)
  • Page 49 Figure 14 - Electrical Diagram, 501-HT (For machines Ranging from S/N 6984)

  • Page 50: Figure 15—Electrical Diagram, 501-Htn (For Machines Beginning With S/N 6984)

    ELECTRICAL SCHEMATICS y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y yy y yyyyyyyyyyyy Figure 15 - Electrical Diagram, 501-HTN (For machines beginning with S/N 6984)

  • Page 51: Figure 16—Electrical Diagram, 501-Lt (For Machines Beginning With S/N 6984)

    ELECTRICAL SCHEMATICS y y y y y y y y y y y y y y yy y y y y y y y y y y y y y y y y y y y y y yy Figure 16 - Electrical Diagram, 501-LT (For machines beginning with S/N 6984)

  • Page 52: Figure 17—Electrical Diagram, 501-Ht (50Hz)

    WHITE CAM 5 FILL CAM 6 RINSE GROUND WHTR WATER HEATER CAM 7 DETERGENT GREEN WATER THERMOSTAT CAM 8 CYCLE HLTS HIGH LIMIT THERMOSTAT CYCLE ON LIGHT MAIN SWITCH ON/FILL OFF/DRAIN 0508975/A Figure 17 - Electrical Diagram, 501-HT (50 Hz)
  • Page 53 TANK HEAT THERMOSTAT CAM 5 FILL FILL VALVE WHITE CAM 6 RINSE GROUND WHTR WATER HEATER CAM 7 DETERGENT GREEN CAM 8 AUTO-FILL DRAIN HLTS HIGH LIMIT THERMOSTAT Figure 18 - Electrical Diagram, 501-HT/UT/UTLC (For machines built prior to S/N 6984)

  • Page 54: Figure 19—Electrical Diagram, 501-Htn (For Machines Built Prior To S/N 6984)

    ELECTRICAL SCHEMATICS 00012 CUSTOMER TO SUPPLY RATED TO CUSTOMER RECEPTACLE VOLTAGE/PHASE/Hz, AS SPECIFIED 115V 60Hz PER ORDER, TO DISCONNECT SWITCH. ALL POWER SUPPLIED TO EACH CONNECTION POINT MUST COMPLY WITH ALL LOCAL ELECTRICAL CODES. TTS 10 WHTR CAM 1 BLU START CW START CCW MAIN (IF USED)

  • Page 55: Figure 20—Electrical Diagram, 501-Lt/Utl (For Machines Built Prior To S/N 6984)

    ELECTRICAL SCHEMATICS 00013 CUSTOMER TO SUPPLY RATED TO CUSTOMER RECEPTACLE VOLTAGE/PHASE/Hz, AS SPECIFIED 115V 60 Hz PER ORDER, TO DISCONNECT SWITCH. BLK WHT ALL POWER SUPPLIED TO EACH CONNECTION POINT MUST COMPLY WITH ALL LOCAL ELECTRICAL CODES. TTS 10 (IF USED) BLACK CAM 9 AUTO-FILL DRAIN PSDR...

  • Page 56: Timer Charts And Diagrams

    If booster thermostat is calling for heat, cam 9 will pause wash cycle until it reaches 82∞C/180∞F. COM. TIMER SWITCH DETAIL 5 4 3 TIMER MOTOR LOCKING SCREW TIMER ASSEMBLY 501HT Figure 21 - Timer Chart and Diagram, 501-HT (For machine beginning with S/N W7604)
  • Page 57 DRAIN VALVE DRAIN PUMP FILL VALVE RINSE OPTIONAL PUMP DETERGENT PUMP AUTO-FILL DRAIN COM. TIMER SWITCH DETAIL 5 4 3 TIMER MOTOR LOCKING SCREW TIMER ASSEMBLY 501HT Figure 22 - Timer Chart and Diagram, 501-HT (Prior to S/N W7603) 51 51...

  • Page 58: Figure 23—Timer Chart And Diagram, 501-Ut

    ELECTRICAL SCHEMATICS 00015 TIMING CHART 501UT TIME IN SECS HOMING WASH PUMP FORWARD=WASH WASH PUMP REVERSE=DRAIN WASH PUMP REVERSING CAM DRAIN VALVE DRAIN PUMP FILL VALVE RINSE OPTIONAL PUMP DETERGENT PUMP AUTO-FILL DRAIN COM. TIMER SWITCH DETAIL 5 4 3 TIMER MOTOR LOCKING SCREW TIMER ASSEMBLY 501UT...

  • Page 59: Figure 24—Timer Chart And Diagram, 501-Lt

    ELECTRICAL SCHEMATICS 00016 TIMING CHART 501LT TIME IN SECS HOMING WASH PUMP FORWARD=WASH WASH PUMP REVERSE=DRAIN WASH PUMP REVERSING CAM DRAIN VALVE DRAIN PUMP FILL VALVE RINSE PUMP SANITIZER PUMP DETERGENT PUMP AUTO-FILL DRAIN COM. TIMER SWITCH DETAIL 5 4 3 TIMER MOTOR LOCKING SCREW TIMER ASSEMBLY 501LT...

This manual is also suitable for:

501-htn501-lt501-lt

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