Service Manual TRI
Contents
1. 8 General R 8 TOOS csc what E cesta dln eee cetera spinach eats 8 Charging Procedure wicca si Yolen 9 eee 10 Electrical 10 TROUBLESHOOTING a ere eo en mr eens emer coer ree oer 11 Service Manual for Cold SUB CP 1C MSME SPECIFICATIONS MODEL DESCRIPTION VOLTAGE AMPS PH SUB CP TC Tri Channel 120 VAC 60Hz 7 9 1 Cold Pan 220 VAC 50Hz 4 4 1 MODEL DESCRIPTION HEIGHT WIDTH LENGTH SUB CP TC Tri Channel 36 00 In 30 00 In 48 00 In Cold Pan 60 00 In 74 00 In 86 00 In INSTALLATION Location The unit represented in this manual is intended for indoor use only Be sure the chosen location has a floor strong enough to support the total weight of the unit Reinforce the floor if necessary to provide for maximum loading For the most efficient operation be sure to provide good air circulation inside and out The outline dim2. Figure 3 Location of Condensing Coil The condenser coil is located and accessed from the front of the unit Figure 3 A vent cover protects the condenser from damage The condenser coil requires regular cleaning and should be done every 60 days However if large amounts of dust and grease accumulate sooner clean the condenser coil every 30 days For light dust use a soft non wire brush For heavier dust use a vacuum or blow with compressed air For heavy grease use a degreasing agent made specifically for condenser coils on refrigeration units Spray the degreasing agent on the coil and then blow with compressed air Never wash with high pressure water which can damage the electrical components located at or near the condenser coil in Service Manual for Tri Channel Cold SUB CP TC PARTS REPLACEMENT Thermostat Replacement Thermostat Figure 4 Location of Thermostat General The thermostat is located in front on the control panel below the refrigeration assembly Figure 4 Disconnect unit from power source Remove control panel cover with thermostat Tag and disconnect thermostat wiring Pog DOS The evaporator coil is located above the refrigeration assembly Remove thermostat probe from evaporator coil Remove knob Remove thermostat mounting screws Remove thermostat from control panel Install replacement thermostat mounting
3. evaporator coils for leaks 9 Install replacement refrigeration assembly onto slide bars 10 Slide in refrigeration assembly to original position 11 Install refrigeration assembly mounting hardware 12 Install expansion valve and evaporator tubing from refrigeration assembly 13 Using tags connect wiring at junction box 14 Connect unit to power source and test unit 15 Charge system according to Duke Manufacturing Service Bulletin Number 26 16 Install vent cover Recharging Refrigeration System General To analyze the performance of a refrigeration system temperature readings are recorded and converted to pressure readings using a standard pressure temperature chart When it is necessary to service a factory sealed refrigeration system and return it to its properly sealed condition strictly adhere to the following approved procedure Tools e Standard hand and refrigeration tools e Refrigerant Type R 404A Refer to data tag for amount in Service Manual for Tri Channel Cold SUB CP TC Charging Procedure NOTE Prior to refrigeration system service special care must be taken during the evacuation process to remove air moisture and other non condensables 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
4. screws and knob NOTE Do not kink thermostat probe 9 Install thermostat probe in evaporator coil 10 Using tags connect thermostat wiring 11 Install control panel cover and mounting screws 12 Install condenser 13 Connect unit to power source and test refrigeration assembly Evaporator Evaporator Coil Located in 24 Upper Body Figure 5 Location of Evaporator Coil General The evaporator coils are embedded in the upper body Figure 5 of the Tri Channel Cold Pan They cannot be serviced or replaced The entire upper body must be replaced Service Manual for Tri Channel Cold 5 Refrigeration System Replacement General Location of Refrigeration Assembly Figure 6 Location of Refrigeration Assembly The refrigeration system assembly is located in the front of the unit Figure 6 1 Disconnect unit from power source Remove vent cover Using refrigeration charging unit evacuate refrigerant from the system according to Duke Manufacturing Service Bulletin Number 26 4 Remove expansion valve and evaporator tubing from refrigeration assembly 5 Remove refrigeration assembly mounting hardware 6 Tag and disconnect wiring at junction box 7 Slide out refrigeration assembly through vent 8 Thoroughly clean the refrigeration assembly compartment NOTE Before installing replacement refrigeration assembly pressure check
5. 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 AN food products from any stainless surface Many food products contain acid which can deteriorate the finish Common foods include tomatoes peppers and other vegetables WARNING THE POWER MUST BE TURNED OFF AND DISCONNECTED AT ALL TIMES DURING MAINTENANCE OR REPAIR FUNCTIONS Service Manual for Tri Channel Cold SUB CP TC PREVENTIVE MAINTENANCE Condensing Coil Figure 2 Location of Condensing Coil Cleaning the Condenser Coil Failure to maintain a clean condenser coil can initially cause high temperatures and excessive run times Continuous operation with dirty or clogged condenser coils can result in compres sor failure Neglecting the condenser coil cleaning procedures will void all warranties and repair or replacement costs associated with the compressor CAUTION To clean the condenser never use a high pressure water wash which can damage electrical components located at or near the condenser coil Condensing Vent Coil
6. stuck in the closed position Replace thermostat Water in bottom of unit Drain hose plugged Clear drain hose Drain hose loose or disconnected from drain pan Tighten or connect drain hose 11 Duke Manufacturing Company 2305 N Broadway St Louis MO 63102 Phone 314 231 1130 Toll Free 1 800 735 3853 Fax 314 231 5074 www dukemfg com SM SUB CP TC
7. Service Manual TRI CHANNEL COLD PAN MODEL SUB CP TC Please read this manual completely before attempting to install operate or service this equipment This manual is Copyright 2005 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 N Broadway St Louis MO 63102 Phone 314 231 1130 Toll Free 1 800 735 3853 Fax 314 231 5074 www dukemfg com SM SUB CP TC Service Manual for Cold 5 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 OR USE GASOLINE OR OTHER FLAMMABLE VAPORS OR LIQUIDS IN THE VICINITY OF THIS OR ANY OTHER APPLIANCE WARNING UNLESS ALL COVER AND ACCESS PANELS ARE IN PLACE AND PROPERLY SECURED DO NOT OPERATE THIS EQUIPMENT CAUTION Observe the following e Minimum clearances must be maintained from all walls and combustible materials e Keep the equipment area free and clear of combustible material e Adequate clearance for air openings e Operate equipment only on the type of electricity indicated on the specification plate e Retain this manual for future r
8. TURNED OFF AND DISCONNECTED WHENEVER PERFORMING MAINTE NANCE OR REPAIR FUNCTIONS in Service Manual for Tri Channel Cold SUB CP TC MAINTENANCE Stainless Steel Care and Cleaning Stainless steel contains 70 80 iron which will rust It also contains 12 30 chromium which 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 if the film is broken or contaminated outside elements can begin to breakdown the steel and begin to form rust or discoloration To prevent rust and discoloration on stainless steel several important steps need to be taken CAUTION Never use steel wool pads or wire brushes or scrapers Avoid AN cleaning solutions that contain alkaline or chloride Use 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 But special stainless
9. eference Service Manual for Tri Channel Cold Pan SUB CP TC Contents SPECIFICATIONS 4 ed seen 4 gpereaien sce sesaspsecdavacactcass pee earaceaiee rac a aa raa 4 a aE asec ram eae 4 Outside EE 4 ses Cesta act enee r E 4 tec eee pect cs aa a Eae aae a a a aiia aiaa ai 4 Electrical CoNNectoN enone nee ee ee ee es 4 MAINTENANCE sirisser a e E RE EEE RARER 5 Stainless Steel Care and ee es 5 PREVENTIVE MAINTENANGE asmaketaren aeaaeae Ea aa iaae iani 6 Cleaning the Condenser 6 eioen naa i e Ea A T Thermostat Replacement arraien a A EE a tle Ea 7 General sepr aa ree rene E 7 sranna a e E R ee ae E eee eer a i 7 reccsen a E E E EEEE ETE A RENE 7 Refrigeration System Replacement siririna EE E E 8 eee a rece E EE sr hana 8 Recharging Refrigeration System
10. ensional drawing for the unit is shown below in Figure 1 Figure 1 Tri Channel Cold Pan Inside Unit Provide adequate space along the front and back taking care to not block airflow to the fan Outside Unit Be sure that the unit has access to ample air avoid hot corners and locations near stoves and ovens Leveling Be sure that 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 unit accordingly Stabilizing Use the leg adjustments to insure that the unit is solid to the floor surface at all four contact points Insure that the unit does not rock when pressure is applied to the top corners Electrical Connection The Tri Channel Cold Pan is available as a 120VAC 60 Hz or as a 220VAC 50 Hz dependent on model All electrical connections should be performed by a certified electrician and should comply with local electrical codes for your municipality WARNING REFER TO THE AMPERAGE DATA LIST INTHE 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
11. ge system using proper refrigerant according to information on data plate 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 Service Manual for Cold SUB CP 1C MSME ELECTRICAL Electrical Schematic Power Switch Thermostat L1 7 to 120 Volt Power Switch L 15 Amp Light LA N Motor Compressor Figure 7 Electrical Schematic 10 in Service Manual for Tri Channel Cold SUB CP TC TROUBLESHOOTING SYMPTOM CAUSE REMEDY Cabinet too warm Unit not plugged in Plug unit in Thermostat set too warm Set thermostat to a higher number for a colder temperature Thermostat switch stuck open in coldest position Replace thermostat Doors not sealing Adjust doors Torn or damaged door gaskets Replace gaskets Evaporator fan not running Check and repair or replace motor Condenser fan motor not running Check and repair or replace fan motor Cabinet too cold Dirty condenser coil or filter Clean coil or filter Refrigerant leak Find leak repair and recharge Thermostat set too cold Set thermostat to a lower number for a warmer temperature Thermostat switch is
12. psig with dry nitrogen If dry nitrogen is unavailable use same type of refrigerant as used in system Evacuate system to 500 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 CAUTION Never use oxygen or acetylene in place of dry nitrogen or AN refrigerant for leak testing A violent explosion may result causing property damage personal injury or death When using nitrogen to pressure test always use a pressure regulator Failure to do so will result in extremely high pressure of the compressor or other system components and result in property damage personal injury and death NOTE Prior to repair ensure there is enough process hose approximately 12 present to complete the repair using the above procedure If not install a new process hose before repair sequence 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 Duke Manufacturing will not reimburse the cost of permanently installed valves 3 After completing repair evacuate system using the triple evacuation method described in Duke Manufacturing Service Bulletin Number 26 4 After completing proper evacuation method rechar
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