Duke KT Service Manual
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Duke KT Service Manual

Duke KT Service Manual

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KT
COUNTER
This document is prepared for trained Duke service technicians. It is not to be used by anyone not properly
qualified to perform these procedures.
This Service Manual is not all encompassing. If you have not been trained on servicing this product, be sure
to read the manual completely before attempting servicing. Be sure all necessary tools, test equipment, and
skills are available. Those procedures for which you do not have the proper skills and test equipment must be
performed only by a qualified Duke trained service technician.
This manual is Copyright © 2010 Duke Manufacturing Co. All rights reserved.
Reproduction without written permission is prohibited. Duke is a registered
Please read this manual completely before attempting to
install, operate or service this equipment
trademark of the Duke Manufacturing Co.
Duke Manufacturing Co.
2305 N. Broadway
St. Louis, MO 63102
Phone: 314-231-1130
Toll Free: 1-800-735-3853
Fax: 314-231-5074
www.dukemfg.com
Service Manual
P/N 229050A

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  • Page 1 Please read this manual completely before attempting to install, operate or service this equipment This document is prepared for trained Duke service technicians. It is not to be used by anyone not properly qualified to perform these procedures. This Service Manual is not all encompassing. If you have not been trained on servicing this product, be sure to read the manual completely before attempting servicing.

  • Page 2: Important Warning And Safety Information

    Service Manual for KT Counter IMPORTANT WARNING AND SAFETY INFORMATION THIS MANUAL HAS BEEN PREPARED FOR PERSONNEL QUALIFIED TO INSTALL ELECTRICAL EQUIPMENT, WHO SHOULD PERFORM THE INITIAL FIELD STARTUP AND ADJUSTMENTS OF THE EQUIPMENT COVERED BY THIS MANUAL. READ THIS MANUAL THOROUGHLY BEFORE OPERATING, INSTALLING OR PERFORMING MAINTENANCE ON THE EQUIPMENT.

  • Page 3: Table Of Contents

    Circuit Breaker Replacement ..................12 RECHARGING REFRIGERATION SYSTEM ..............12 Tools ..........................12 Duke Service Bulletin Number 26 – Refrigeration System Evacuation ......12 Duke Service Bulletin Number 35 – Accessing Sealed Refrigeration Systems ....13 SERVICE INFORMATION ......................14 MAINTENANCE ........................14 Stainless Steel Care and Cleaning ...................14 Cleaning ........................14...

  • Page 4: Introduction

    Location REFER TO THE AMPERAGE The KT Counter is intended for indoor use only. Be sure DATA LIST IN THE SPECIFICATIONS OR THE the chosen location has a floor strong enough to support SERIAL TAG DATA AND YOUR LOCAL CODE...

  • Page 5: Parts Removal And Replacement Procedures

    The KT Counter is equipped with two dry channel units, installed in the Hot Food Table. Each dry channel unit has 1. In KT Load Center, place appliance to be replaced or its own Display Control Panel. repaired circuit breaker in the OFF position.

  • Page 6: Relay Box

    Service Manual for KT Counter If complete Relay Box is to be replaced, label and disconnect wires. Remove the Relay Box. If components in the Relay Box are to be removed, remove the Relay Box cover. 6. Reverse procedure to assemble and install Relay Box.

  • Page 7: Solid State Relay (Ssr)

    Service Manual for KT Counter Solid State Relay (SSR) Channel Assembly The Heat Elements, Temperature Probes and RTDs are embedded in a foil wrap that is attached to the bottom of each Channel Assembly. These parts are not serviced in the field.

  • Page 8: Top Cold Pan Assembly

    Compressor is located next to the refrigerator doors on the angled toward the operator on each side. Refer to Duke side of the KT Counter that does NOT have the refrigerator Manufacturing Service Bulletin Number 26 and the temperature display.

  • Page 9: Top Cold Pan Compressor Assembly

    The refrigerator unit is located below the Top Cold Pan Unit. The Top Pan Compressor Assembly is located behind the The refrigerator can be accessed from both sides of the KT louvered vent next to the refrigerator. It is on the side of the Counter.

  • Page 10: Rbc Thermostat

    Thermostat. Set the new thermostat according to Subway standards. ® Restore power to the KT Counter; monitor the RBC for proper operation. 10. Readjust the thermostat setting as needed. Figure 13: Evaporator Fans 7. Tag and disconnect the Evaporator Fan wires.

  • Page 11: Rbc Refrigeration System

    RBC Refrigeration System The RBC unit is a 4 door model with access from both sides of the KT Counter. Two of doors, one on each side are larger. For the larger door use 19 inch gasket part number, 216636.

  • Page 12: Circuit Breaker Replacement

    Evacuate system to 500 microns. The system is now ready 6. Refer to the tags, and reconnect the wires. to receive refrigerant charge according to information 7. Restore the KT Counter to service and check the circuit on data plate. breaker for proper operation.

  • Page 13: Duke Service Bulletin Number 35 - Accessing Sealed Refrigeration Systems

    1. Install a temporary access valve on the high and low side of process hoses as close to factory crimps as possible. 2. Use temporary valves to perform repair. Note: Duke Manufacturing will not reimburse the cost of permanently installed valves. 3. After completing repair, evacuate system using the triple...

  • Page 14: Service Information

    Service Manual for KT Counter SERVICE INFORMATION MAINTENANCE Heat Tint Darkened areas, called heat tint, may appear on stainless steel Stainless Steel Care and Cleaning exposed to excessive heat, which causes the protective film to thicken. It is unsightly but is not a sign of permanent damage.
  • Page 15 Service Manual for KT Counter CAUTION: Do not use a high-pressure hose to rinse 1. Lift the louvered vent panel up and away from the front the filters. The high-pressure water will of the unit. damage the filter mesh. 2. Gently pull the filters out of their mountings.

  • Page 16: Troubleshooting Guide

    Bad Power Switch Replace Tortilla Griddle Power Switch. Open Tortilla Griddle Heat Replace Tortilla Griddle Heat Element. Element KT Counter unit has power but No Power Make sure Dry Channel Power Switch is in ON Dry Channel Unit will not heat. position Check Dry Channel Display Control Panel setting;...
  • Page 17 TROUBLESHOOTING GUIDE (CONTINUED) SYMPTOM POSSIBLE CAUSE REMEDY Cold Pan Unit doesn’t get cold. Coolant Leak Repair Leak referring to Duke Service Bulletin Number 26. Replace Cold Pan. Replace Compressor Assembly. Defective Thermostat Replace Cold Pan Thermostat. Dirty Compressor Air Filter Clean or replace Air Filter.

  • Page 18: Schematics

    Service Manual for KT Counter SCHEMATICS Figure 21. Wiring Diagram Side A...
  • Page 19 Service Manual for KT Counter Figure 22. Wiring Diagram Side B...
  • Page 20 Service Manual for KT Counter Duke Manufacturing Co. 2305 N. Broadway St. Louis, MO 63102 Phone: 314-231-1130 Toll Free: 1-800-735-3853 Fax: 314-231-5074 www.dukemfg.com P/N 229050...

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