Service Manual TRI-CHANNEL COLD PAN
Contents
1. 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 dimensional 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 Panis availableasa 120VAC 60 Hz or as a220VAC 50 Hzdependenton model All electrical connections should be performed by acertified electrician and should comply with local electr2. Manufacturing will not reimburse the cost of permanently installed valves 3 Aftercompleting repair evacuate system using the triple evacuation method described in Duke Manufacturing Service Bulletin Number 26 4 After completing proper evacuation method recharge 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 Tri Channel Cold Pan SUB GP HE ELECTRICAL Electrical Schematic gt e e E E E 8 p F 5 m EF A m Em Figure 7 Electrical Schematic 10 UCC Ser vice Manual for Tri Channel Cold Pan SUB GP TROUBLESHOOTING SYMETOM CAUSE REMEDY Cabinet too warm ne Thermostat set too warm p f Set thermostat to a higher number for a colder Thermostat switch stuck open in temperature Replace thermostat Lcoldest position Doors not sealing Adjust doors Evaporator fan net running _____t Condenserfan meter net running __ Check and repair or replace moter Replace gaskets Cabinet too cold Drain hose loose or disconnected from drain pan Water in bottom of unit Dirty condenser co
3. refrigeration assembly 5 Remove refrigeration assembly mounting hardware 6 Tag and disconnect wiring at junction box Slide out refrigeration assembly through vent 8 Thoroughly clean the refrigeration assembly compartment NOTE Before installing replacement refrigeration assembly pressure check evaporator coils for leaks 9 Installreplacementrefrigeration 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 ChargesystemaccordingtoDukeManufacturing 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 Standard hand and refrigeration tools e Refrigerant Type R 134A 4 5 ounces Charging Procedure MT Service Manual for Tri Channel Cold Pan SUB GP NOTE Prior to refrigeration system service special care must be taken during the evacuation process t
4. Service Manual TRI CHANNEL COLD PAN MODEL SUB CP 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 P N 219206A Service Manual for Tri Channel Cold Pan SUB GP HE IMPORTANT WARNING AND SAFETY INFORMATION WARNING READ THIS MANUAL THOROUGHLY BEFORE OPERATING INSTALLING OR PERFORM ING 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 SE CURED 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 reference Service Man
5. aning procedures will void all warranties and repair or replacement costs associated with the compressor CAUTION Toclean the condenser never use a high pressure water wash which can damage electrical components A located at or near the condenser coil Condensing Vent Coil Figure 3 Location of Condensing Coil The condenser coil is located and accessed from the front of the unit Figure 3 Avent 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 C Service Manual for Tri Channel Cold Pan SUB GP PARTS REPLACEMENT Thermostat Replacement MM Thermostat Figure 4 Location of Thermostat General The thermostat is located in front on the control panel below the refrigeration assembly Figure 4 1 Disconnect unit from power source 2 Remo
6. 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 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 Neveruse an acid based cleanser Be sure to clean all food products AN 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 PREVENTIVE MAINTENANCE Service Manual for Tri Channel Cold Pan SUB GP 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 cle
7. ical codes for your municipality 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 RE PAIR FUNCTIONS MAINTENANCE Stainless Steel Care and Cleaning C Service Manual for Tri Channel Cold Pan SUB GP 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 ifthe 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 cleaning solutions that contain alkaline or chloride Use aline based or non chloride cleaning sol is 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
8. il or filter Check and repair or replace motor LRefrigerantleak E Thermostat set too cold Clean coilor fitter Thermostat switch is stuck in the Set thermostat to a lower number for a warmer closed position eraperature Drain hose plugged Replace thermostat Cleardrain hese Tighten or connect drain hose 11 Duke Manufacturing Company P N 219206
9. o 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 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 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 refrigerant for leak testing Aviolent explosion may result causing property Ay 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 ofthe compressor or othersystem 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
10. ual for Tri Channel Cold Pan SUB GP Contents SPECIFICATIONS a 4 INSTALEATION cont A A ee ee ee ee 4 LOGAUON cord a un dle o A dae DR 4 MAS IGS UM tddi e aida cocos 4 Outside Units ca ini OA a AO RA AAA 4 BM Pe ORO 5 A 4 e I A APA arona O E Oo ohed atlas AER 4 Electrical Connection eee 4 MAINTENANCE mia E a bas TE EE a EE AA RE i 5 Stainless Steel Care and Clean ss cnc da 5 PREVENTIVE MAIN TENANCE 2 icictscasnsnstansinnacennasharnsecnunatan natieisndasdprsikeuaaddaessinacttiauesniatbubabtoetaketpiaabanententunc 6 Cleaning the Condenser Oli li illinois 6 PARTS REPLACEMENT sir ot ESen AEEA RN NO aaa EEEE siaii 7 Thermostat Replacement oren e e Sete eee se eee 7 CA A E E E EEEE EEE 7 Evaporator eee 7 General secip cvs camecdrvie ape ioawcadedwsadeesnenngeemagsenneaadasdenexenceweued sawed PEERAERTS 7 Refrigeration System Replacement ini ii os 8 o E E E E E teavonelvndeats 8 Recharging Refrigeration SYM tddi a 8 SA soeubeuacbenVecedsedadinatsuneuvensateduadudeaveesieads 8 TOS ia ads 8 Charging Procedure arpa ii a taa 9 A A o A e E 10 Electrical Schematis icono a AA 10 TROUBLESAOOTINS lt uta is 11 Service Manual for Tri Channel Cold Pan SUB GP HE SPECIFICATIONS MODEL DESCRIPTION VOLTAGE AMPS PH SUB GP Tri Channel 120 VAC 60Hz 7 9 1 Cold Pap 220 VACHA 44 4 MODEL DESCRIPTION HEIGHT WIDTH LENGTH SUB GP Tri Channel 36 00 In 30 00 In 48 00 In Cold Pan 60 00 In 74
11. ve control panel cover with thermostat 3 Tag and disconnect thermostat wiring q 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 oN oOo Install replacement thermostat mounting 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 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 Pan SUB GP HE 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 a refrigeration charging unit evacuate refrigerant from the system according to Duke Manufacturing Service Bulletin Number 26 4 Remove expansion valve and evaporator tubing from
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