Service Manual TACO BELL I-LINE COUNTER
Contents
1. APW TACO GRILL REFRIGERATOR 208V 1200W FRONT PANEL 120V 720W iy OUTLET no 018 PERM CONNECTION GREEN CONNECTION CHEESE MELTER 542 FRONT PANEL BLACK ___ 208 3904 208 2100W BLAC CKT 1 15 p BLUE 9 NEMA 6 20 NO OUTLET Black a Ok CKT 8 GREEN PERM GREEN L 1 eT 7 RIGHT MONITOR STAGING WARMER one CKT 3 20 BLACK 120V 820W WHITE 7771 a CKT 4 15 tthe 20 11 WHITE t 9 5 20 OI CREEN 5 20A X CREEN NEMA 5 20 RECEPTACLE CKT 6 20 X LTO 150 T GROUND LEFT MONITOR 5 04 FRONT PANEL 1 120 1440W BLACK SZ X 21 22 COLD NEMA 5 20 WHITE X BLACK RECEPTACLE 6 GREEN 23 g 1201 948W 150 GREEN NO OUTLET GROUND PERM CONNECTION RECEPT BAR 120V 1920W BLACK __ NEMA 5 20 WHITE BOTTOM RECEPT RECEPTACLE 9 GREEN BLACK 120V 1920W NEMA 5 20 H24T TACO TOWER j GREEN 120V 1840W LIGHTS SW1 FRONT PANEL HEATER BLACK WE NO OUTLET GREEN PERM CONNECTION Figure 29 Circuit Diagram 20 Manual for2. 14 DUKE SERVICE BULLETIN NUMBER 26 REFRIGERATION SYSTEM 224 14 DUKE SERVICE BULLETIN NUMBER 35 ACCESSING SEALED REFRIGERATION 5 14 LOAD CENTER ANNEE 15 Circuit Breaker 15 SERVICE 16 MAINTENANCE 16 Stainless Steel 16 Compressor Air Filter and 204 0 2 16 18 SCHEMATICS en 20 Service Manual for Taco Bell l Line Counters TACO BELL I LINE COUNTER SPECIFICATIONS MODEL DESCRIPTION VOLTAGE SIZE TBIL RL 131 I Line Counter Right to Left 208 VAC 3 Phase 1 1313 TBIL LR 131 I Line Counter Left to Right 208 VAC 3 Phase 1 1313 INSTALLATION LOCATION STABILIZING The I Line Counter is intended for indoor use only Be sure the chosen location has a floor strong enough to support the t
3. BLACK 13 CHEESE MELTER BLACK CKT 11 RED Gh 208 240 3300W RED CKT 11 NEMA 6 20 GREEN 11 amp 12 BLUE 5 WHITE 4 2 c CHEESE MELTER BLACK CKT 12 GREEN amp 14 208 240 3300W RED CKT 12 aa Poa 09 GREEN 11 amp 12 J BLUE STAGER BLUE CKT 8 res WHITE CKT 15 120V 820W WHITE 8 YELLOW NEMA 5 1519 11 amp 12 B CREEN J BLACK CKT 11 RED CK 1 BLUE CKT 8 WHITE CKT 8 4 GREEN GREEN CKT 8 BLACK CKT 12 RED 12 BLUE CKT 7 TOASTER BLUE 7 1 WHITE CKT 7 amp 9 no 256 WHITE 7 amp 9 5 RED GREEN CKT 7 9 amp 4 crci oUTLET GREEN 7 9 amp 4 BLACK CKT 9 RED CKT 4 FUTURE USE BLACK 9 WHITE 7 amp 9 120V 1440W gt NEMA 5 15 8 GREEN 7 9 amp 4 BLUE CKT 15 OUTLET WHITE CKT 6 amp 16 BLUE GREEN CKT 15 6 amp 16 SCALE RED CKT 4 BLACK CKT 6 120V 1440W WHITE 4 RED SGRI 1 NEMA 5 15 OUTLET GREEN 7 9 amp 4 4 TOASTER BLUE 15 120 2300W WHITE CKT 15 NEMA 5 20 4 GREEN 15 6 amp 16 OUTLET COLD CKT 6
4. Bell Counters PANEL 1 TACO BELL I LINE COUNTER 125A 24P 120 208V 3PH 4W S N 70A MINIMUM PANEL AMPERAGE TEM EQUIPMENT EQUIPMENT TEM CIRCUIT POSITION EQUIPMENT SERVED VOLTAGE VOLTAGE EQUIPMENT SERVED NUMBER NUMBER TACO GRILL 208 120 REFRIGERATOR 208 MELTER RIGHT MONITOR STAGER COLD PAN LEFT MONITOR BOTTOM RECEPTACLE TOP RECEPTACLE HATCO H24T 3 PHASE PANEL BOX 18128 TOTALLOAD 5460 VA Figure 30 Load Center Diagram 21 Service Manual for Taco Bell Counters LOWER MONITOR GREEN YELLOW 5 120V 1440W WHITE 5 NEMA 5 15 0 j sue 5 CHEESE MELTER BLACK CKT 13 208 240 3300W RED CKT 13 NEMA 6720 GREEN CKT 13 amp 14 6 CHEESE MELTER BLACK 14 GREEN YELLOW CKT 5 208 240V 3300W RED CKT 14 WHITE 5 NEMA 6 20 GREEN CKT 13 amp 14 JA 1 WHITE GREEN A
5. 10 Thermostat Mounting Bracket Capillary Tube ae Figure 14 Tri Channel Thermostat and Mounting Bracket 8 Reverse this procedure to install new Tri Channel Thermostat be careful not to kink capillary tubing when reconnecting it 9 Place the Main Power ON OFF switch in the ON position 10 Place the Tri Channel Power switch in the ON position 11 Set the Thermostat based on guidelines provided by Subway 12 Allow the Tri Channel unit to cool for approximately 20 minutes before performing a temperature check on each channel 13 Adjust Thermostat as required until proper temperature is achieved Tri Channel Compressor Assembly PAXTON WA UH SSS Tri Channel Refrigerated Base Manual for Bell 1 11 Counters Figure 15 Location of Compressor Units 10 Reverse this procedure to install new Tri 1 Refrigerated Base Unit Compressor Channel Compressor assembly 11 Charge cooling system following procedures 2 i enanne Compressor in the RECHARGING REFRIGERATION I Line Counter is supplied with two SYSTEM section of this manual compressors One operates the Refrigerated Base unit The other operates the Tri Channel Cold Pan Condenser Cooling Fan Unit Both compressors are located below the control panel behind the service panel 1 Place Main Power ON OFF switch in the shroud OFF posit
6. 5 Dry Channel Relay Box Manual for Bell Counters The Dry Channel Relay Box is mounted on the bottom of the Dry Channel Tub assembly Typically it is on the side of the Dry Channel unit that faces the front of the I Line Counter the right side Under normal circumstances it is not necessary to replace the Dry Channel Relay Box in its entirety Note The Power ON OFF switch mounted on the Dry Channel Relay Box unit must remain in the ON position at all times The operator is not able to access this switch once the Dry Channel unit is mounted the I Line Counter The Dry Channel unit is turned ON and OFF using the 4 ON OFF switch on the Control Panel Refer to the Control Panel section of this manual for instructions on replacing the Control Panel ON OFF switches Relay Box Figure 6 Location of Operator ON OFF Switch Dry Channel Unit Relay Box Components Figure 7 Relay Box with cover removed Remove the four screws holding the Dry Channel Relay Box cover in place Service Manual for Taco Bell l Line Counters Solid State Relay SSR Replacement Solid State Relay SSR Figure 8 Solid State Relay SSR The I Line Counter uses Dry Channel Model HDC3 Components There are 6 Solid State Relays in the this unit Test each relay to determine which one is causing the fault 1 Label and disconnect wires from SSR to be repla
7. Air Filters Figure 27 Location of Compressor Air Filters The Compressor Air Filters are located behind the large louvered vent mounted on the front of the unit Clean the air filters with mild soap and water on a monthly basis 1 Lift the louvered vent panel up and away from the front of the unit 2 Gently pull the filters out of their mountings Service Manual for Taco Bell l Line Counters Figure 28 Air Filters 3 Wash the filters in mild soap and warm water solution 4 Rinse with warm water WARNING DO NOT USE A HIGH PRESSURE HOSE TO RINSE THE FILTERS THE HIGH PRESSURE WATER WILL DAMAGE THE FILTER MESH 5 Allow the filters to dry thoroughly before reinstalling them 6 Install the filters and reattach the louvered vent 7 If replacement filters are required use Duke part number 214947 17 Service Manual for Taco Bell Counters TROUBLESHOOTING GUIDE SYMPTOM POSSIBLE CAUSE REMEDY 1 Counter Unit does not operate I Line Counter Unit has power but Tortilla Grill does not heat No Power No Power Bad Power Switch Open Tortilla Grill Heat Element Make sure Main Power ON OFF switch is in ON position Check Circuit Breaker Check Tortilla Grill Power Switch Check Tortilla Grill Circuit Breaker in Load Center Replace Tortilla Grill Power Switch Have customer contact APW for service I Line Counter Unit has powe
8. E E A E EA A R ES 6 6 Relay BOX E 6 Relay amp 7 Solid State Relay SSR 2 2 22 1 7 Transformer Replacement 8 8 COED 9 Evaporator 9 Thermostat wees 9 Tri Channel 10 Condenser Cooling 11 REFRIGERATED BASE UNIT 11 Evaporator Fan 55 11 RBC 12 RBC Refrigeration 13 RBC Door AN 13 RBC 13 RECHARGING REFRIGERATION SYS TEM 14 TOOLS
9. OR USE GASOLINE OR OTHER FLAMMABLE VAPORS OR LIQUIDS IN THE VICINITY OF THIS OR ANY OTHER APPLIANCE WARNING DO NOT OPERATE THIS EQUIPMENT WITHOUT PROPERLY PLACING AND SECURING ALL COVER AND ACCESS PANELS CAUTION Observe the following e Provide and maintain adequate minimum clearances from all walls and combustible materials e Provide and maintain adequate clearance for air openings Keep the equipment area free and clear of combustible material e Operate equipment only on the type of electricity indicated on the specification plate e Retain this manual for future reference Manual for Bell Counters TABLE OF CONTENTS TACO BELL COUNTER SPECIFICATIONS 4 INSTALLATION eee eee 4 6 E E E EE 4 LEVELING 4 STABILIZING reessione aaa 4 ELECTRICAL CONNECTION 4 PARTS REMOVAL AND REPLACEMENT 25022 5 MAIN CONTROL 5 Dry Channel Control Display 5 Control Panel ON OFF 5 DRY CHANNEL
10. WHITE 6 amp 16 PERM CONNECTION 15 6 amp 16 REFRIGERATOR RED 16 2 720 WHITE 6 amp 16 NO OUTLET PERM CONNECTION GREEN 15 6 amp 16 22 Service Manual for Bell Counters 23 Service Manual for Taco Bell l Line Counters ME Duke Manufacturing Company 2305 Broadway St Louis MO 63102 800 735 3853 314 231 1130 Fax 314 231 5074 www dukemfg com P N 219208
11. a refrigeration system record temperature readings Convert temperature into pressure using a standard pressure temperature chart When itis necessary to service a factory sealed refrigeration system and return itto its properly sealed condition strictly adhere to the following approved procedure Note Ensure that there is enough process hose approximately 12 available to complete the repair If not install a new process hose before repair sequence 1 Install a temporary access valve on the high and low sides 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 Service Manual for Taco Bell l Line Counters 3 After completing repair evacuate system using the triple evacuation method 4 After completing proper evacuation method recharge system using proper refrigerant according to information on the data plate Refrigerated Base Unit 8 oz of R 134a refrigerant Tri Channel Cold Pan Unit 12 oz of R404a refrigerant 5 Continue crimping process hose just below temporary valve and again 2 below crimp 6 With crimp tool in place remove temporary valve 7 Braze shut end of process hose 8 Allow to cool for about 5 minutes 9 Remove crimp tool 10 Check brazed end for leaks LOAD CENTER Figure 25 Location of l Line Counter Load Center The Load Cente
12. Service Manual TACO BELL 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 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 2011 Duke Manufacturing Company All rights reserved Reproduction without written permission is prohibited Duke is a registered trademark of the Duke Manufacturing Company Duke Manufacturing Company 2305 Broadway St Louis MO 63102 800 735 3853 314 231 1130 Fax 314 231 5074 www dukemfg com P N 219208B Service Manual for Taco Bell Counters IMPORTANT WARNING AND SAFETY INFORMATION WARNING READ THIS MANUAL THOROUGHLY BEFORE OPERATING INSTALLING OR PERFORMING MAINTENANCE ON THE EQUIPMENT WARNING FAILURE TO FOLLOW INSTRUCTIONS IN THIS MANUAL CAN CAUSE PROPERTY DAMAGE INJURY OR DEATH WARNING DO NOT STORE
13. Tub Assembly 1 Remove six screws three on each side attaching the Dry Channel Top Frame to its tub assembly 2 Lift the Dry Channel Top Frame off the tub assembly 3 Lift the Channel Assembly out of the tub Use care when pulling the Channel Assembly s wire harness out of the tub assembly 4 Usinganohmmeter test the resistance across the entire heating element It should read approximately 248 ohms Also test the RTD circuit its normal reading is approximately 1 000 ohms Replace the channel assembly if either the heater circuit or RTD circuit is reading out of tolerance 5 To install a new Channel Assembly reverse steps 1 through 3 Note End channels are a different assembly from center channels When replacing an end channel use part 171263SED When replacing the center channel use part 171262SED TRI CHANNEL COLD PAN Figure 12 Tri Channel Cold Pan Unit The Tri Channel Cold Pan is located in the center of the l Line Counter Unit above the refrigerator Refer to Duke Manufacturing Service Bulletin Number 26 and the RECHARGING REFRIGERATION SYSTEM section of this manual before completing Evaporator replacement procedures Evaporator The evaporator coils embedded in the body of the Tri Channel Cold Pan are not serviceable Replace the entire upper body if an evaporator leak or failure occurs 1 Place Main Power ON OFF switch in the OFF position Use proper Lockout Tagout procedures 2 Evac
14. ced 2 Remove two screws attaching SSR to Relay Box and remove SSR 3 Reverse procedure to install new SSR Transformer Replacement Transformer Figure 9 24Volt Step Down Transformer The step down transformer utilizes a tapped primary the allows the Dry Channel unit to be operated at either 208VAC or 240VAC 1 and disconnect the primary power cord from the transformer also tag the terminals on the transformer to ensure the power cord will be connected at the correct voltage for the I Line Counter 2 Tag and disconnect wires to the secondary Remove four nuts attaching transformer to the studs in the Relay Box and remove Transformer 4 Reverse procedure to install anew Transformer Ensure thatthe power cable is connected to the correct terminals on the transformer to math the operating voltage of the I Line Counter Channel Assembly Channel Assembly Figure 10 Dry Channel HDC3 Tub and Channel Assembly The Heat Elements Hi Limit Thermostats and RTDs are imbedded in a foil wrap that is attached to the bottom of each Channel Assembly These parts are not serviceable in the field The entire Channel Assembly must be replaced in the event of a failure of any of these components Service Manual for Bell Counters Channel 1 Channel 2 Channel 3 Zones 1A amp 1B Zones 2A amp 2B Zones 3A amp 3B Dry Channel Top Frame Figure 11 Dry Channel
15. ed CAUTION Never use steel wool pads wire brushes scrapers or cleaners containing abrasives Avoid cleaning solutions that contain alkaline or chloride Use non alkaline based or non chloride cleaning solutions Anything containing chloride will damage the protective film on stainless steel Chlorides are found in household and industrial cleaners and also in hard water and salts If a chloride or alkaline cleaner has been used rinse repeatedly and dry thoroughly Always use only soft cloths or plastic scouring pads For routine cleaning use warm soapy water For stubborn stains use a non abrasive cleanser For heavy grease use a degreaser For best results rub with the grain of the steel Pitting and cracking are early signs of stainless steel breakdown Special stainless steel cleaners can restore and preserve the protective film If signs of breakdown appear thoroughly clean and dry all surfaces Begin regular application of a high quality stainless steel cleaner according to the manufacturer s instructions Again always rub with the grain of the steel for best results CAUTION Never use an acid based cleanser Be sure to clean all food products from any stainless surface Many food products contain acid which can deteriorate the finish Common acidic foods include tomatoes peppers and other vegetables Compressor Air Filter Care and Cleaning i I Louvered Panel
16. f the way being careful not to kink capillary tubing Remove RBC Refrigeration assembly hardware Remove the screws holding the Evaporator assembly to the side panel of the RBC Tag and disconnect the RBC Refrigeration System wiring Remove RBC Refrigeration system Reverse this procedure to install new RBC Refrigeration System 13 Service Manual for Taco Bell Counters RBC Door Gaskets 1 Refrigerator Door Gasket Figure 24 Refrigerator Door Gasket The doors of the RBC are two different sizes A 173 part 216645 gasket is required for one and a 193 part 216636 gasket for the other 1 Pull gasket out of door panel groove 2 Press new gasket into groove 3 Ensure door seals properly RBC Door Adjustment Over time and with repeated use the RBC doors may begin to sag When this occurs door adjustment is required 1 Open the sagging door to its full open position 2 Check hinges for tightness If they are loose snug them up but don t overtighten them 3 Place a flat headed screwdriver against the inside edge of the top hinge tap it with a small hammer using light taps until the door lines up 4 Repeat for the bottom hinge if needed 5 Tighten all of the hinge screws 14 RECHARGING REFRIGERATION SYSTEM TOOLS e Standard hand and refrigeration tools e Refrigerant Type R 134A or R 404A Refer to equipmen
17. he ON Position Replace it if it reads open or a high resistance 6 Remove two screws on front of control panel to remove faulty switch 7 Replace switch with properly rated switch 8 Refer to tags and reconnect wires 9 Install protective cover 10 Close control panel 11 Restore I Line Counter to service and check for proper switch operation DRY CHANNEL Dry Channel oe General Figure 4 Location of the Dry Channel Unit The Dry Channel unit is mounted above the compressor units The Dry Channel unit must be removed from the I Line Counter in order to service a channel assembly or the relay box 1 Place Main Power ON OFF switch the OFF position Use proper Lockout Tagout procedures Open the I Line Counter Control Panel 3 Tag and unplug the Dry Channel cables from the Dry Channel Control Display 4 Tag and disconnect Dry Channel power cord 5 Remove the hardware that holds the Dry Channel unit in place in the I Line Counter 6 Carefully lift the Dry Channel unit free of the l Line Counter Do not damage the Dry Channel s cabling or power cord 7 Reverse this procedure to reinstall the Dry Channel unit after servicing it or to install a replacement unit Relay Box Note The following procedures are performed while the Dry Channel unit is removed from the l Line Counter Figure
18. ion Use proper Lockout Tagout Compressor procedures Remove the louvered vent 2 3 Remove the air filters 4 Remove the front panel Screws Compressor Assembly Fan Mounting Mounting Hardware Bracket Screws Figure 17 Tri Channel Compressor Assembly 1 Place Main Power ON OFF switch in the OFF position Use proper Lockout Tagout procedures Refri ted B Tri Channel Compressor 2 Taganddisconnectthe Tri ChannelCompressor wiring Figure 16 Front Panel Removed 3 Remove the compressor assembly mounting hardware 2 1 Ranne 4 Carefully pull the compressor assembly about half way out of the I Line Counter 6 Taganddisconnectthe Tri ChannelCompressor wiring CAUTION Avoid placing undue stress on coolant lines It may be necessary to the cut wire ties the hold the coolant lines in place to allow the coolant lines to move freely Remember to apply new 8 Remove Tri Channel Compressor mounting wire ties as needed once the hardware procedure is completed 7 Disconnect coolanttubing from evaporator unit Refer to the RECHARGING REFRIGERATION SYSTEM section of this manual for proper refrigeration system evacuation procedures 9 Slide Tri Channel Compressor assembly out 5 Disconnect the tag the fan wiring through the front of the I Line Counter Unit 6 Remove fan mounting bracket screws and the fan shroud screws 11 Service Ma
19. ir Filter Failed Condenser Cooling Fan Condenser Motor Failure No Power Make sure Tri Channel Power Switch is in the ON position Check Tri Channel Circuit Breaker Check Thermostat setting Repair leak referring to Duke Service Bulletin Number 26 Replace Cold Pan Unit if needed Replace Compressor Assembly if needed Replace Tri Channel Thermostat Clean or replace Air Filter Replace Condenser Cooling Fan Replace Condenser Assembly Check Refrigerator Unit Circuit Breaker Line Counter has power but Refrigeration Unit does not get cold Faulty Thermostat Dirty Compressor Air Filter Failed Condenser Cooling Fan Coolant Leak Evaporator Fan Failure Door Gaskets Leaking Excessively Check Thermostat setting Replace Thermostat Clean or replace Compressor Air Filter Replace Condenser Cooling Fan Repair leak referring to Duke Service Bulletin Number 26 Replace Compressor Unit if needed Replace Evaporator Unit if needed Replace Evaporator Fan Assembly Replace Refrigerator Door Gaskets 19 Service Manual for Taco Bell Counters SCHEMATICS 5 208 120V 125A LOAD CENTER
20. nual for Taco Bell l Line Counters 7 8 Remove fan assembly Reverse this procedure to install the new fan assembly REFRIGERATED BASE UNIT RBC Refrigerated Base Unit Figure 18 Refrigerated Base Unit RBC Evaporator Fan Assembly The Evaporator FanAssembly is accessed through the louvered panel on the inside of the RBC The assembly is equipped with two fans 1 12 Place Main Power ON OFF switch in the OFF position Use proper Lockout Tagout procedures Open the RBC doors and remove the shelf shelves for easier access to louvered panel Refrigerated Base Louvered Panel Figure 19 Location of Louvered Panel 3 Remove the louvered panel on the inside wall of the RBC to gain access to the Evaporator Fan Assembly Screws Evaporator Fan Assembly Figure 20 Evaporator Fan Assembly Louver Removed Remove the screws securing the Evaporator Fan Assembly to the Evaporator Assembly Carefully lift the Evaporator FanAssembly out of the Evaporator Assembly Be careful not to pull too hard on the fan wiring Evaporator Fan Bracket Evaporator Figure 21 Exploded View Evaporator Fan Assembly Manual for Bell Counters 6 Tag and disconnect the Evaporator Fan wires 7 Aseparate bracket secures each fan remove the two nuts securing the faulty fan 8 Reverse this procedure
21. otal weight of the unit fully loaded with food product Reinforce the floor if necessary to provide for maximum loading For the most efficient operation be sure to provide good air circulation LEVELING Be sure the unit is placed on a firm flat surface floor Check for cracks in flooring or tile and avoid these areas if possible necessary place support pads properly rated for the weight of the unit to bridge uneven or cracked flooring Level the unit accordingly using the leg adjusters Use the leg adjustments to ensure that the unit is solid to the floor surface at all contact points Ensure thatthe unit does not rock when pressure is applied to the top corners ELECTRICAL CONNECTION The l Line Counter Unit requires 208VAC Phase 50 60 Hz Direct wiring Counter Unit to the power supply must be performed by a certified electrician and must comply with local electrical codes for your municipality Service Manual for Bell Counters PARTS REMOVAL AND REPLACEMENT PROCEDURES MAIN CONTROL PANEL Dry Channel Control Display Control Display Figure 1 Location of Dry Channel Control Display The Dry Channel Control Display is located on the operator s side of the I Line Counter next to the power switches Place the Main Power ON OFF switch the OFF position Use proper Lockout Tagout procedures Lift control panel up and tilt i
22. r but Dry Channel Unit does not heat Dry Channel Unit is on but one channel does not heat No Power Bad Power Switch Bad Control Board Defective Heat Element or Thermostat Defective RTD Defective Relay Make sure Dry Channel Power Switch is in the ON position Check Dry Channel Circuit Breaker Replace Power Switch Replace Control Board Test heat circuit with ohmmeter replace Channel Assembly if test fails It should be around 124 ohms Test RTD at room temperature using ohmmeter It should read around 1K ohms Replace Channel Assembly if test fails Test relay when voltage is applied to input output should be closed Replace if output is open Dry Channel Unit appears to be working but has no display indication Defective Display Panel Replace the Display Panel Line Counter Unit has power but Taco Tower does not heat or light No Power Make sure Taco Tower Power Switch is in the ON position Check Taco Tower Circuit Breaker Taco Tower lights come on but it does not heat 18 Failed Infrared Heater Have customer contact Hatco for service Service Manual for Bell Counters TROUBLESHOOTING GUIDE CONTINUED SYMPTOM POSSIBLE CAUSE REMEDY Line Counter Unit has power but Tri Channel Unit does not get cold Tri Channel Unit does not get cold No Power Coolant Leak Bad Thermostat Dirty Compressor A
23. r is located behind the cabinet door on the right side of the l Line Counter Unit It is the electrical distribution center for the l Line Counter 15 Service Manual for Taco Bell Line Counters Circuit Breaker Replacement Circuit Breakers Figure 26 Location of Circuit Breakers 1 Place Main Power ON OFF switch in the OFF position Use proper Lockout Tagout procedures 2 Taganddisconnectthe affected circuit breaker wires 3 Pull the circuit breaker out of its mounting slots 4 Push the new circuit breaker into the slot ensure that it locks into position Referring to the tags reconnect the wires Place Main Power ON OFF switch in the ON position 7 Refer to TROUBLESHOOTING section if replacement breaker does not solve problem 16 SERVICE INFORMATION MAINTENANCE Stainless Steel Care and Cleaning Stainless steel contains 70 80 iron Iron will rust It also contains 12 30 chromium Chromium forms an invisible passive film over the steel surface and acts as a shield against corrosion As long as the protective film remains intact the metal will not corrode However ifthe film is broken or contaminated outside elements can begin to break down the steel and begin to form rust or discoloration To prevent rust and discoloration on stainless steel several important steps are requir
24. t identification plate for proper refrigerant replacement DUKE SERVICE BULLETIN NUMBER 26 REFRIGERATION SYSTEM EVACUATION Note Prior to refrigeration system service special care must be taken during the evacuation process to remove air moisture and other non condensable gasses from the system Duke Manufacturing recommends the following triple evacuation method Failure to follow this procedure may result in poor refrigeration system performance 1 Evacuate system to 1500 microns 2 Break vacuum to 2 psig with dry nitrogen If dry nitrogen is unavailable use same type of refrigerant as used in system 3 Evacuate system to 1500 microns Break vacuum to 2 psig with dry nitrogen If dry nitrogen is unavailable use same type of refrigerant as used in system 5 Evacuate system to 500 microns The system is now ready to receive refrigerant charge according to information on data plate AN WARNING NEVER USE OXYGEN OR ACETYLENE IN PLACE OF REFRIGERANT AND DRY NITROGEN FOR LEAK TESTING A VIOLENT EXPLOSION MAY RESULT CAUSING PERSONAL INJURY OR DEATH ALWAYS USE A PRESSURE REGULATOR WHEN USING NITROGEN TO PRESSURE TEST FAILURE TO DO SO WILL RESULT IN EXTREMELY HIGH PRESSURE WHICH COULD EXCEED THE BURST PRESSURE OF THE COMPRESSOR OR OTHER SYSTEM COMPONENTS AND RESULT IN PERSONAL INJURY OR DEATH DUKE SERVICE BULLETIN NUMBER 35 ACCESSING SEALED REFRIGERATION SYSTEMS To analyze the performance of
25. t out Screws Figure 2 Control Panel in open position 3 Tag and unplug Dry Channel Control Display Board wiring 10 Remove the four Dry Channel Control Display Board mounting screws Remove the Dry Channel Control Display Board through the front of the control panel Install the new Dry Channel Control Display Board reattach mounting screws Refer to the wire tags and reconnect all wire harnesses Place the Main Power ON OFF switch in the ON position Place Dry Channel power switch in ON position Wait a minimum of 20 minutes Monitor Dry Channel Control Display Board for proper operation Control Panel ON OFF switches Control Switch Panel Figure 3 Control Switch Panel 1 Tri Channel Cold Pan 120VAC Single Phase 948W 2 Taco Tower Infrared Heaters and Lights 120VAC Single Phase 1840W 3 Tortilla Grill 208VAC 3 Phase 1200W 4 Dry Channel 3 Phase 2100W Warmer 208VAC Service Manual for Taco Bell Line Counters The four switches on the control panel are labeled Cold Pan Taco Tower Tortilla Grill and Dry Channel 1 Place the Main Power ON OFF switch in the OFF position Use proper Lockout Tagout procedures 2 Open the switch panel 3 Remove the protective cover from the back of the switches 4 Tag and disconnect the wires from the suspect switch 5 Test the switch for continuity it should read 0 ohms in t
26. to install a new Evaporator Fan RBC Thermostat Electrical Hex Head Screws Mounting Plate Figure 22 Location of RBC Thermostat The Refrigerator Thermostat is located in the compressor compartment 1 Place Main Power ON OFF switch in the OFF position Use proper Lockout Tagout procedures 2 Remove the louvered vent and air filters 3 Remove compressor compartment front panel 4 Remove the Thermostat knob 5 Remove the two hex head screws holding the Thermostat mounting plate to the electrical box 6 Tag and disconnect RBC Thermostat wiring 7 Disconnect the capillary tubing Remove RBC Thermostat from mounting plate 9 Reverse this procedure to install the new RBC Thermostat RBC Refrigeration System Condenser Assembly Compressor Ze SS 22 67 Figure 23 Complete RBC Refrigeration Unit The RBC refrigeration unitis a complete assembly thatincludes the condenser assembly compressor assembly and the evaporator assembly 1 Place Main Power ON OFF switch the OFF position Use proper Lockout Tagout procedures Remove the louvered vent cover air filters and compressor compartment front panel Note The Tri Channel thermostat must be moved out of the way for this procedure 3 Tag and disconnectthe Tri Channel thermostat wiring if necessary Detach the Tri Channel Thermostat from the RBC side panel and move it out o
27. uate coolant following procedures in the RECHARGING REFRIGERATION SYSTEM section of this manual 3 Disconnect the coolant tubing 4 Remove Tri Channel mounting hardware 5 Pull Tri Channel Pan assembly out I Line Counter Unit 6 Install new Tri Channel Pan 7 Braze coolant lines from Tri Channel Pan to Compressor lines 8 Charge cooling system following procedures in the RECHARGING REFRIGERATION SYSTEM section of this manual Service Manual for Taco Bell l Line Counters 9 Place the Main Power ON OFF switch in the ON position 10 Place the Tri Channel Power switch in the ON position 11 Check Tri Channel Cold Pan for proper operation Thermostat Bont Panel Air Filters Cold Thermostat Figure 13 Location of Cold Pan Thermostat The Tri Channel Cold Pan thermostat is located in the compressor compartment behind the louvered vent 1 Place Main Power ON OFF switch in the OFF position Use proper Lockout Tagout procedures Remove the louvered vent Remove both air filters Remove the front panel ae Tag and disconnectthe Tri Channel Thermostat wiring 6 Disconnect capillary tube from the thermostat 7 Remove Tri Channel Thermostat from mounting bracket Note The Tri Channel Thermostat is mounted to the side of the Refrigerated Base Unit RBC Condenser Housing Do not confuse this thermostat with the one used for the RBC
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