Service Manual TACO BELL DUAL-LINE COUNTER
Contents
1. HDC6 DRY HDC6 DRY CHANN WARMER BLACK CHANN WARMER 208V 2100 BLACK GREEN PERM CONNECTION GREEN m PERM CONNECTION CHEESE MELTER APW GRIDDLE 500 FRONI PANEL 10 1 BLACK __ 208 3300W 208V 2676N lt BLACK nema 6 20 9 No ouTLeT BL GREEN NEMA 6 PERM CONNECTION GREEN CKT 11 1 5 1 CHEESE MELTER GRAIL 54 57 BLACK 208 53004 INFRARED HEATER GREEN 1 BLACK 6 20 INFRARED BEATER j DOA CKT 13 GREEN CKT 14 E CHEESE MELTER SCALE CKT 15 208 33008 6 20 120V 1440W BLACK 16 GREEN NEMA 5 15 9 WHITE 17 OUTLET GREEN xX CHEESE MELTER LOWER MONITOR X BLACK 208V 3300W Eina BLACK NEMA 6 20 9 120 1440W BLACK2. TOASTER BLUE 7 120V 2300 NEMA 5 20 OUTLET WHITE 7 amp 9 GREEN 7 9 amp 4 FUTURE USE BLACK 9 120V 1440W NEMA 5 15 ouTLET 9 WHITE 7 amp 9 GREEN _ 7 9 amp 4 SCALE RED 4 a 120V 1440W NEMA 5 15 GFCI OUTLET WHITE CkT 4 t GREEN 7 9 amp 4 4 TOASTER BLUE 15 120V 2300W NEMA 5 20 4 OUTLET 9 WHITE 15 15 6 amp 16 COLD BLACK CKT 6 120 948W NO OUTLET PERM CONNECTION WHITE 6 amp 16 GREEN 15 6 amp 16 REFRIGERATOR 120V 720W NO OUTLET PERM CONNECTION RED 16 WHITE 6 amp 16 GREEN 15 6 amp 16 5 A BLACK 13 RED CKT 13 BLUE WHITE CKT 4 2 BACK GREEN CKT 13 amp 14 BLACK CKT 14 RED CKT 14 BLUE WHITE CKT 15 YELLOW GREEN CKT 11 amp 12 BLACK CKT 11 RED CKT 11 BLUE CKT 8 WHITE CKT 8 GREEN GREEN CKT 8 BLACK CKT 12 RED CKT 12 BLUE CKT 7 WHITE CKT 7 amp 9 5 RE
3. EEEE 13 Duke Service Bulletin Number 26 Refrigeration System Evacuation 13 Duke Service Bulletin Number 35 Accessing Sealed Refrigeration Systems 13 SERVICE INFORMATION oles 14 MAINTENANCE eee 14 Stainless Steel Care and Cleaning 14 Compressor Air Filter Care 14 TROUBLE SHO TING GUIDE aaea 16 SCHEMATICS 18 Service Manual for Bell Dual Line Counters gt TACO BELL DUAL LINE COUNTER SPECIFICATIONS MODEL DESCRIPTION VOLTAGE WATTS DC DLTB M Counter Dual Line 157 1 120 208 240vac 3798 INSTALLATION LOCATION The Dual Line unit is intended for indoor use only Be sure the chosen location has a floor strong enough to support the total 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 If necessary place support pads properly rated for the weight of the unit to bridge uneven or cracked flooring Level
4. 1 Tag and disconnect wires from Transformer 2 Removethe four nuts attaching the Transformer and remove the Transformer 3 Reverse procedure to install new Transformer 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 The entire Solid State Relay Channel Assembly must be replaced in the event SSR of a failure of any of these parts Channel Figure 4 Solid State Relays SSR 1 Tag and disconnect wires from the SSR to be replaced 2 Remove the two screws attaching the SSR and remove the SSR 3 Reverse procedure to install new SSR Figure 6 Dry Channel Tub Assembly Place the Main Power ON OFF Switch in the OFF position Use proper Lockout Tagout procedures Check that the Dual Line is disconnected from power source Remove six screws three on each side attaching the channel top frame to tub Carefully lift the Channel Assembly out taking care not to damage wire connections Label and disconnect wires from foil wrap on the Channel Assembly to the Control Board Using an ohmmeter 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 are reading ou
5. oe waren 0 14 10 5 19 a e 15 far 720 120 5 1 16 24 Po T E eT OEE RE REN 11 11808 3 PHASE PANEL BOX B 33694 KVA TOTAL LOAD 12256 VA 19 Service Manual for Dual Line Counters gt LOWER MONITOR 120V 1440W NEMA 5 15 0 ISOLATED GND ORANGE CHEESE MELTER 208 240 3300W 6 20 GREEN YELLOW CKT 5 WHITE 5 BLUE 5 BLACK CKT 13 RED CKT 13 H GREEN 13 amp 14 CHEESE MELTER BLACK 14 208 240V 3300W NEMA 6 20 RED CKT 14 GREEN 13 amp 14 CHEESE MELTER BLACK CKT 11 208 240 3300W NEMA 6 20 RED CKT 11 GREEN CKT 11 amp 12 CHEESE MELTER BLACK 12 208 240 3300W 6 20 RED 12 GREEN 11 amp 12 STAGER BLUE WHITE 120V 820W NEMA 5 15 ouTLeT GREEN 8 GREEN 4 GREEN YELLOW CKT 5 BLUE
6. GREEN 6 NEMA 5 20 WHITE OUTLET ISO 5 GROUND 4 BLACK 120V 1440 WHITE NEMA 5 20 120v BLACK GREEN GFCI OUTLET outer WHITE 4 PERM CONNECTION GREEN 7 REFRIGERATOR BLACK 120V 720W TOASTER NO OUTLET 120v 1440w m BLACK PERM CONNECTION NEMA 5 2 6 WHITE crcl OUTLET 9 GREEN 7 UPPER MONITOR BLACK 120V 1440W STAGER WHITE NEMA 5 15 9 120V 820W BLACK GREEN GFCI OUTLET 0 NEMA 5 20 WHITE 150 OUTLET L GROUND FUTURE USE BAR BLACK 120V 1440W g 5 15 E WHITE 9 Figure 21 Circuit Diagram 18 Me Service Manual for Dual Line Counters Figure 22 Load Center Diagram PANEL 1 TACO BELL DUAL LINE COUNTER 200 AMP PANEL 120 208V 3PH 4W S N 120Amp Minimum Panel Amperage POSITION CIRCUIT TEM EQUIPMENT LOAD PHASE LOAD J EQUIPMENT ITEM CIRCUIT POSITION NUMBER NUMBER SIZE EQUIPMENT SERVED VOLTAGE f VA WIRE VA VOLTAGE EQUIPMENT SERVED SIZE NUMBER NUMBER 6 15 CO Ps 2 20 2676 1300 2 1 a 3300 28 2 10 Near re A et 5 1s 120
7. RECHARGING REFRIGERATION SYSTEM TOOLS e Standard hand and refrigeration tools e Refrigerant Type R 134A or 0404 Refer to the unit s identification plate for the correct refrigerant type 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 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 JN 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 PERS
8. Service Manual for Taco Bell Dual Line Counters 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 required 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
9. Readjust the thermostat setting as needed Me Service Manual for Dual Line Counters RBC Refrigeration System oa amp Refrigeration Side Unit Louvered Panel Figure 15 RBC Refrigeration System Place Main Power ON OFF switch in the OFF position Use proper Lockout Tagout procedures Evacuate coolant following procedures in the RECHARGING REFRIGERATION SYSTEM section of this manual Remove center shelf for easier access Remove the side louvered panel Tag and disconnect wiring Remove Refrigeration Unit mounting hardware Remove the screws holding the evaporator assembly to the RBC cabinet Reverse this procedure to install new Refrigeration Unit RBC Door Gaskets Refrigerator Door Gasket Figure 16 Refrigerator Door Gasket The RBC unit is a 4 door model with access from both sides of the Dual Line Two of the doors one on each side are larger For the larger door use 19 inch gasket part number 216636 The smaller doors use a 17 inch gasket part number 216645 4 Pull gasket out of door panel groove Press new gasket in groove Ensure door seals properly To test for proper seal use a sheet of paper approximately the size of dollar bill Close the door on the piece of paper it should pull snugly Adjust door as necessary RBC Door Adjustment Over time and with repeated use the RBC doors
10. may begin to sag When this occurs door adjustment is required 1 2 Open sagging door to full open position Check hinges for tightness If they are loose snug them up but don t over tighten them 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 is lined up 11 Service Manual for Taco Bell Dual Line Counters 4 Repeat for the bottom hinge if needed 5 Tighten all the hinge screws LOAD CENTER Load Center Figure 17 Location of Dual Line Load Center The Load Center is located behind the cabinet door on the end of the unit nearest the Dry Channel Warmer 12 Circuit Breaker Replacement Circuit lt Figure 18 Location of Circuit Breakers Place the Main Power ON OFF switch in the OFF position Follow proper Lockout Tagout procedures 1 Taganddisconnectthe affected circuit breaker wires 2 Pull circuit breaker out of its mounting slots Push the new circuit breaker into the slot ensure that it locks into position 4 Refer to the tags and reconnect the wires Restore the Dual Line to service and check the circuit breaker for proper operation Note Refer to Troubleshooting section if replacement breaker does not solve problem Me Service Manual for Dual Line Counters
11. the unit accordingly using the leg adjusters STABILIZING 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 Dual Line unit requires Direct wiring Dual Line unit to the power supply must be performed by a certified electrician and must comply with local electrical codes for your municipality JN WARNING REFER TO THE AMPERAGE DATA LIST IN THE SPECIFICATIONS OR THE SERIAL TAG DATA AND YOUR LOCAL CODE OR THE NATIONAL ELECTRICAL CODE TO BE SURE UNIT IS CONNECTED TO THE PROPER POWER SOURCE A PROTECTED CIRCUIT OF THE CORRECT VOLTAGE AND AMPERAGE MUST BE RUN FOR CONNECTION OF THE SUPPLY CORD OR PERMANENT CONNECTION TO THE UNIT THE POWER MUST BE TURNED OFF AND DISCONNECTED WHENEVER PERFORMING MAINTENANCE OR REPAIR FUNCTIONS Me Service Manual for Dual Line Counters PARTS REMOVAL AND REPLACEMENT PROCEDURES DRY CHANNEL FOOD WARMERS Display Control Panel The Dual Line unit is equipped with two Dry Channel units one on each side of the Dual Line Each Dry Channel unit has its own Display Control Panel HEAT ON Function Control Select Button Buttons Figure 1 Dry Channel Display 1 Place the Main Power ON OFF switch in the OFF position 2 Disconnect the Dual Line unit from its power source 3 Rem
12. D GREEN CKT 7 9 amp 4 BLACK CKT 9 RED 4 BLUE 15 WHITE 6 amp 16 BLUE GREEN 15 6 amp 16 BLACK 6 RED 16 ORANG 20 Me Service Manual for Dual Line Counters Duke Manufacturing Company 2305 Broadway St Louis 63102 800 735 3853 314 231 1130 Fax 314 231 5074 www dukemfg com P N 219209
13. GE INJURY OR DEATH WARNING DO NOT STORE 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 e Keep the equipment area free and clear of combustible material e Operate equipment only the type of electricity indicated on the specification plate e Retain this manual for future reference Me Service Manual for Dual Line Counters TABLE OF CONTENTS TACO BELL DUAL LINE COUNTER 4 INSTALLATION er reer 4 Location 4 BOVE 4 SL 4 Electrical 4 PARTS REMOVAL AND REPLACEMENT 5 DRY CHANNEL 2 2 5 Display 5 Relay BOX 5 Dry Channel Power O
14. N OFF Switch 5 Solid State Relay 6 6 Channel PSST Ys eateries eee 6 TORTILLA GRILL TACO TOWER POWER ON OFF 5 7 7 8 8 Tri Channel 8 REFRIGERATED BASE UNIT 9 9 RBC Thermostat 10 Refrigeration 11 RBC Door GAS ROIS aE A EEDE 11 RBC Door 11 LOAD CENTER 12 Circuit Breaker 12 RECHARGING REFRIGERATION SYSTEM bsssscicsrcasotictesssecenecusecnentexunbeabedsdeenteneauteennns 13 TOS
15. ONAL INJURY OR DEATH DUKE SERVICE BULLETIN NUMBER 35 ACCESSING SEALED REFRIGERATION SYSTEMS To analyze the performance of 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 it to 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 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 16 2 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 13
16. TACO BELL DUAL LINE COUNTER i Service Manual SAS 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 63102 800 735 3853 314 231 1130 Fax 314 231 5074 www dukemfg com P N 219209B Service Manual for Taco Dual Line Counters gt 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 DAMA
17. itches 1 Tortilla Grill 2 Taco Tower Infrared Heaters and Lights Figure 8 Tri Channel Cold Pan Unit Service Manual for Taco Dual Line Counters gt The Dual Line is equipped with two Tri Channel Cold Pans Both Tri Channel Cold Pans are mounted above the refrigerator unit and angled toward the operator on each side 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 OFF position Use proper Lockout Tagout procedures 2 Evacuate coolant following procedures in the RECHARGING REFRIGERATION SYSTEM section of this manual Disconnect the coolant tubing Lift Tri Channel PanAssembly out of Dual Line unit Install new Tri Channel Pan Assembly Braze coolant lines from new Tri Channel to compressor lines 7 Charge the cooling system Refer to the RECHARGING REFRIGERATION SYSTEM section of this manual Tri Channel Thermostat Cold Pan Mounting Figure 9 Location of Tri Channel Cold Pan Thermostat The Tri Channel Cold Pan thermostat is located in the compressor compartment behind the l
18. nnel Unit Power Switch is in the ON position Check Tri Channel Unit Circuit Breaker Check Thermostat setting Me Service Manual for Dual Line Counters TROUBLESHOOTING GUIDE CONTINUED SYMPTOM POSSIBLE CAUSE REMEDY Tri Channel Unit doesn t get cold Dual Line has power but Refrigerator does not get cold Coolant Leak Defective Thermostat Dirty Compressor Air Filter Failed Condenser Cooling Fan Condenser Motor Failure No Power Thermostat Setting Defective Thermostat Dirty Compressor Air Filter Failed Condenser Cooling Fan Coolant Leak Evaporator Fan Failure Door Gaskets Leaking Excessively Repair Leak referring to Duke Service Bulletin Number 26 Replace Cold Pan Replace Compressor Assembly Replace Tri Channel Thermostat Clean or replace Air Filter Replace Condenser Cooling Fan Replace Condenser Assembly Check Refrigerator Unit Circuit Breaker Check Thermostat Setting Replace Thermostat Clean or replace 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 Door Gaskets 17 Service Manual for Taco Bell Dual Line Counters SCHEMATICS 3 208 120V 200A LOAD CENTER
19. nual for Bell Dual Line Counters M TROUBLESHOOTING GUIDE SYMPTOM Dual Line does not operate Dual Line has power but Tortilla Grill does not heat Dual Line unit has power but Dry Channel Unit will not heat Dry Channel unit is working but one channel does not heat Dual Line unit has power but Taco Tower doesn t heat or light Taco Tower lights come on but it doesn t heat Dual Line unit has power but Tri Channel unit doesn t get cold 16 POSSIBLE CAUSE No Power No Power Bad Power Switch Open Tortilla Grill Heat Element No Power Bad Power Switch Display Control Panel Malfunction Relay Box failure Open Heat Element circuit No Power Failed Infrared Heater No Power REMEDY Make sure Main Power switch is in the ON position Check Main Circuit Breaker Make sure Tortilla Grill Power Switch is in the ON position Check Tortilla Grill Circuit Breaker in Load Center Replace Tortilla Grill Power Switch Replace Tortilla Grill Heat Element Make sure Dry Channel Power Switch is in the ON position Check Dry Channel Display Control Panel setting should be 275 F Check Dry Channel Circuit Breakers Replace Power Switch Replace the Display Control Panel Replace the Relay Box Replace Channel Assembly Make sure Taco Tower Power Switch is in the ON position Check Taco Tower Circuit Breaker Replace Infrared Heater Make sure Tri Cha
20. ouvered vent The Tri Channel s compressor is located next to the refrigerator doors on the side of the Dual Line that does NOT have the refrigerator temperature display 1 Place Main Power ON OFF switch in OFF position Use proper Lockout Tagout procedures Remove the louvered vent Tag and disconnect thermostat wiring Disconnect the capillary tube Remove thermostat from mounting bracket O a A OO N Install new thermostat being careful notto kink capillary tube while reconnecting it 7 Referring to tags reconnect wires 8 Set the thermostat according to Subway guidelines 9 Reattach front panel and air filters 10 Restore power to the Dual Line 11 Allow Tri Channel units to coolfor approximately twenty minutes before performing temperature check on each channel 12 Adjust Thermostat as needed Me Service Manual for Dual Line Counters Tri Channel Compressor Assembly Tri Channel Compressor Figure 10 Compressor Assembly The Tri Channel CompressorAssembly is located behind the louvered vent next to the refrigerator It is on the side of the Dual Line that does NOT have the refrigerator temperature display 1 Place the Main Power ON OFF switch in the OFF position Follow proper Lockout Tagout procedures 2 Remove the louvered vent 3 Remove the air filter 4 Remove side panel Note Shelf may also be removed for easier access 5 Tag and disconnect compres
21. ove the four screws securing the Display Control Panel and move Display Control Panel away from mounting surface 4 Ifthe Display Control Panel is to be completely removed label and disconnect wires Remove Display Control Panel Reverse this procedure to install Display Control Panel Relay Box Each Dry Channel unit is equipped with its own Relay Box The Relay Box is located under the unit Each Relay Box has an ON OFF switch Main Power On Off Switch Figure 2 Relay Box Location 1 Place the Main Power ON OFF Switch in the OFF position Use proper Lockout Tagout procedures 2 Remove the four screws securing the Relay Box the bottom of the Dry Channel Unit 3 If complete Relay Box is to be replaced label and disconnect wires 4 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 Note Thefollowingcomponentremovalis based on the cover having been already removed Dry Channel Power ON OFF Switch 1 Tag and disconnect the Relay Box ON OFF Switch wires 2 Slide the Relay Box ON OFF Switch out through front of switch mount 3 Reverse procedure to install anew Main Power ON OFF Switch Service Manual for Bell Dual Line Counters Transformer Figure 3 Exploded View of Relay Box Internal Components Solid State Relay SSR Figure 5 240 208 Step Down Transformer
22. sor wiring 6 Disconnect coolanttubing from evaporator unit Refer to the RECHARGING REFRIGERATION SYSTEM section of the manual for proper evacuation procedures 7 Remove mounting bolts 8 Slide compressor unit out through the front of the unit 9 Install new compressor assembly 10 Reattach braze coolant lines 11 Reconnect compressor wiring 12 Reconnect wiring 13 Charge the cooling system Refer to the RECHARGING REFRIGERATION SYSTEM section of this manual for proper charging procedures 14 Attach air filter and all panels 15 Restore Dual Line to service and check for proper compressor operation REFRIGERATED BASE UNIT RBC Temperature nied Display 75 22 aJa Refrigerated Base Unit Figure 11 Refrigerator Unit with Temperature Display The refrigerator unit is located below the Tri Channel Cold Pan Unit The refrigerator can be accessed from both sides of the Dual Line The side with the temperature display is considered to be the front of the refrigerator unit The refrigerator s compressor is located behind the louvered vent to the left of the left front door 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 Place the Main Power ON OFF switch in the OFF position Use proper Lockout Tagout procedures 2 Openthe RBC doors and remove the shelf for easier access
23. t of tolerance Reverse this procedure to install the new Dry Channel Assembly For end channels use part number 171263SED Replace center channels with part number 171262SED Return the Dual Line unit to service and check for proper operation TORTILLA GRILL AND TACO TOWER POWER ON OFF SWITCHES Control Switch Panel Me Service Manual for Taco Bell Dual Line Counters The Tortilla Grilland Taco Tower ON OFF Switches are located on one side of the Dry Channel Warmer next to the Dry Channel Display 1 8 9 10 11 12 Place the Main Power ON OFF Switch in the OFF position Use proper Lockout Tagout procedures Remove the screws securing the switch plate Remove protective cover if present from the back of the switches Tag and disconnect the wires from the suspect switch Using an ohmmeter check the switch for continuity It should read 0 ohms in the ON position and a very high reading in the OFF position Replace the switch if it fails the continuity tests Remove two screws on front of control panel to remove faulty switch Replace existing switch with properly rated switch Refer to tags and reconnect wires Install protective cover Mount switch to mounting plate Reattach mounting plate to unit Restore Dual Line to service and check for proper switch operation TRI CHANNEL COLD PAN Tri Channel Cold Pan n Figure 7 Location of Power ON OFF sw
24. 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 14 CAUTION Never use an acid based cleanser Be sure to clean all food products from stainless surface Many food products contain acid which can deteriorate the finish Common foods include tomatoes peppers and other vegetables COMPRESSOR AIR FILTER CARE Air Filters Louvered Panel Figure 19 Location of Compressor Air Filters The Compressor Air Filters are located behind the large louvered vent mounted on the front and rear of the unit Clean the air filters with mild soap and water once a month 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 Bell Dual Line Counters Figure 20 Air Filter 3 Wash the filters mild soap and warm water solution 4 Rinse with warm water CAUTION 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 filter and reattach the louvered vent If replacement filters are required refer to the parts list for the correct part number 15 Service Ma
25. to the louvered panel Service Manual for Taco Dual Line Counters gt 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 12 Evaporator Fan assembly 4 Remove the screws securing the Evaporator Fan Assembly to the Evaporator Assembly 5 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 Fan Figure 13 Evaporator Fans 10 6 Tag and disconnect the Evaporator Fan wires 7 Aseparate bracket secures each fan remove the 2 nuts securing the faulty fan 8 Reverse this procedure to install a new Evaporator Fan RBC Thermostat RBC Thermostat Figure 14 Location of Refrigerator Thermostat The RBC 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 2 Open the louvered vent 3 Tag and disconnect RBC Thermostat wiring 4 Disconnect the capillary tube be careful not to kink the tube 5 Remove the RBC Thermostat from the mounting bracket 6 Reverse these procedures to install a new RBC Thermostat 7 Setthe new thermostat according to Subway standards 8 Restore power to the Dual Line monitor the RBC for proper operation 9
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