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Simply Engineered Better
Technical Manual
Undercounter
Dishwasher
Model
501-HT
501-HTN
501-LT
Machine Serial No.
July, 2003 Manual P/N 0508576 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. Moyer Diebel, Ltd.
336/661-1992 905/562-4195
Fax: 336/661-1979 Fax: 905/562-4618
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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 _____________ ______
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REVISIONS Revision History Revision Revised Serial Number Comments Date Pages Effectivity 12/16/92 All — 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. 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 Redesig
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CONTENTS CONTENTS Page INTRODUCTION....................................................................................................................................... 1 WARRANTY.............................................................................................................................................. 2 GENERAL .................................................................................................................................................. 3 INSTALLATION ....
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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................................................
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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. This manual provides: •Warranty information • Installation and operation procedures • Maintenan
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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 o
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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 -Common utility connections -Two dish racks (peg and flat) -120 Volt control circuit -Exclusive vent design for -Convenient, easy to use
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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 Booster Machine Power Requirement Model Voltage Rise Full Load Amp (125% Service Factor) 501LT 115/60/1 N/A 12 15 501HTN 115/60/1 N/A 12 15 501HT 208/6
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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. Leve
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INSTALLATION Plumbing Connections CAUTION: ! Plumbing connections must comply with local sanitary and plumbing codes. Water Connections o o 1. 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. 2. Install a manual shut-off valve in the water supply line to accommodate servicing the machine. The shut-off valve should be the same size or larger tha
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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. d
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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. After a 2-3 second pause, the pump drain cycle be
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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
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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. Intervals shown in the following schedules represent an average length of time between n
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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: ! Deliming solution or other acids must not come in contact with household bleach (sodium hypochlorite) or any chem
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MAINTENANCE Maintenance Schedule • 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. Ineffective screening c
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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. If a problem still exists, use the following table for troubleshoot
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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. after activating the Wait for wash tank to fill. ON/FILL switch Cycle time increases Incoming water.................................... Raise temperature to 60°C/140°F with each cycle temp
