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Service Manual ELECTRIC OPEN WELL FOOD WARMERS

1. WARNING DO NOT OPERATE THIS EQUIPMENT WITHOUT PROPERLY PLACING AND SECURING ALL COVER AND ACCESS PANELS CAUTION Observe the following 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 Operate equipment only on the type of electricity indicated on the specification plate e Retain this manual for future reference ii es Service Manual for Electric Open Well Food Warmers TABLE OF CONTENTS SAFELY INFORMATION ae EEE EE EEEE EEE 2 SPECIFICATIONS n rre ir dens a ib rie ER E via in KR A ERR RR E RN 4 INSTAPEDATION se 4 OCGA ON 4 MI Um Tm UE 4 782 16 TFS m tr E 4 Electrical Connection siiivices ies eret een e e en dae a ea n C n e a t n a e i E Co 4 E 5 Stainless Steel Care and finos NP 5 PARTS REPEAGCEMEN T 31 222 manana ana a e aeea aa te Tre er ERa aT aAa R LA RR ARR 6 Infinite Switch Replacement nne n nne n ener nennen nnn 6 7 Electronic Thermostat Replacement 8 Indicator Lamp 8 Dome Element Replacement sssssssssssss
2. Iron will rust It also contains 12 3096 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 wire brushes or scrapers 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 Forroutine cleaning use warm soapy water For stubborn stains use a non abrasive cleanser Forheavy grease use a degreaser Forbestresults 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 instructio
3. mounting screws 8 Remove the electronic thermostat and sensor probe 9 Install the electronic thermostat probe into the slide in tube in the pan Note Do not kink the electronic thermostat probe when reinstalling it 10 Installthe new electronic thermostat mounting screws and knob 11 Reference the tags to reconnect the wiring to the electronic thermostat 12 Install the bottom cover 13 Slide the unit back into its cabinet 14 Connect the unit to its power source INDICATOR LAMP REPLACEMENT Aerohot e Indicator Lamp Figure 6 Location of Indicator Lamp The indicator lamp is located on the control panel above the infinite switch or electronic thermostat slide in units only on all electric units as depicted in figure 6 Economate units do not have an indicator lamp 1 Disconnect unit from power source Note Slide in and drop in units must be removed from their cabinets 2 Removethe screwsthathold the bottom cover in place 3 E EPandASI models Slide the bottom cover toward the back of the unit and lift it out as depicted in figure 2 4 Disconnect the indicator lamp wiring from the infinite switch or electronic thermostat Unscrew the indicator lamp lens Remove the indicator lamp assembly Replace the indicator lamp assembly Screw the indicator lamp lens on Reconnect the indicator lamp wiring 9 100 x 0 Install the bottom cover iis S
4. ORD L2 1 GROUND SECTIONAL DETAIL FOR INFINITE SWITCHES DOME ELEMENT INFINITE SWITCH CONNECTORS L1 UNITY GROUND SHLD BOX L2 pue ee L1 BLACK 110V x SINGLE PHASE L2 BLACK UNIT GROUND B H Ps L3 BLACK Figure 14 Schematics of Open Well Units with Electronic Thermostats or Infinite Switches Service Manual for Electric Open Well Food Warmers 13 Service Manual for Electric Open Well Food Warmers NOTES 14 ii Service Manual for Electric Open Well Food Warmers CUSTOMER ASSISTANCE To aid in reporting this unit in case of loss or theft please record below the model number and serial number located on the unit We also suggest you record all the information listed and retain for future reference MODEL NUMBER SERIAL NUMBER DATE OF PURCHASE DEALER TELEPHONE SERVICER TELEPHONE NORTH AMERICA amp LATIN AMERICA UK amp IRELAND Duke Manufacturing Company Duke Mfg UK 2305 N Broadway St Louis MO 63102 Phone 314 231 1130 Toll Free 1 800 735 3853 Fax 314 231 5074 CONTINENTAL EUROPE Duke Manufacturing C R s r o Prologis Park D1 West Building 4 Zdebradska 92 Ricany Jazlovice 251 01 Czech Republic Phone 42 0 257 741 033 Fax 42 0 257 741 039 TO ACCESS INTERNET www dukemfg com Duke House Unit 10 Greendale Business Par
5. Service Manual Your Solutions Partner ELECTRIC OPEN WELL FOOD WARMERS 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 Written consent from Duke is required to reproduce any portion of this Manual Unauthorized reproduction is prohibited 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 219215B Service Manual for Electric Open Well Food Warmers 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
6. dels Remove the unit from the base cabinet first Remove the wire harness cover 4 Disconnect the dome element wiring Remove the dome element support clip in the pan 6 Remove the dome element support clip from the element 7 Remove the dome element mounting screws 8 Remove the dome element from the pan 9 Replace the dome element 10 Replace the dome element support clip 11 Replace the screws that hold the dome element and support clip in place 12 Connect the dome element wiring 13 Install the wire harness cover 14 Countertop models Install the bottom cover Storage base models Reassemble the unit to the storage base 15 Connect the unit to its power source Service Manual for Electric Open Well Food Warmers CARVING BOARD SHELF REPLACEMENT Aerohot E and EP Models Figure 8 Location of Carving Board Shelf The carving board and carving board shelf are located on the front of the unit above the infinite switches as depicted in figure 8 The carving board is replaceable as a separate unit if needed Carving board Carving board mounting stud Figure 9 Carving board mounting stud 1 Lift the carving board off of its mounting studs depicted in figure 9 10 Slotted hole Figure 10 Carving board shelf mounting brackets 2 Loosen the top screw in the slotted hole at the top of the bracket on both sides of t
7. ers with brakes must be replaced with brake unit 7 Reattach the mounting bolts and tighten them properly 8 Turn the base unit right side up and reinstall the warmer assembly 9 Reconnect the unit to its power source Figure 12 Economate Casters Economate units are supplied with NSF listed 5 black stem casters Two casters are provided with locks 1 Disconnect the unit from its power source 2 Remove the unit from its base 3 Turn the base upside down 11 Service Manual for Electric Open Well Food Warmers TROUBLESHOOTING SYMPTOM CAUSE REMEDY Element does not heat Unit not plugged in Plug unit in Defective thermostatic switch or infinite switch Replace with proper part rated for the model No power to unit Check circuit breakers or fuses Open element Test for continuity and replace if necessary Unit not level Legs not adjusted properly floor models Using the leg adjusters adjust the legs until level Cabinet not level drop in or slide in units Shim cabinet until level 12 5 CHEMATICS CORD CONNECTED UNITS 2 WIRE 1 PHASE GROUNDED TO SECTIONAL SWITCHES AND ELEMENTS Lu STRAIN OIL E BLK RELIEF RESISTANT CORD BLK L2 WHT FOR MIX GROUND CORD CONNECTED UNITS 3 WIRE 3 PHASE GROUNDED TO SECTIONAL SWITCHES AND ELEMENTS STRAIN L1 OIL BLK RELIEF RESISTANT BUE C
8. ervice Manual for Electric Open Well Food Warmers Note Reinstall slide in units into their cabinets 11 Connect the unit to its power source DOME ELEMENT REPLACEMENT Aerohot Figure 7 Location of Dome Element The dome element is located inside each pan as depicted in figure 7 Use replacement elements that are rated for the model being serviced 1 Disconnect unit from power source Note Drop in and slide in units must be removed from their cabinets 2 Removethe screwsthathold the bottom cover in place see figure 2 3 Slide the bottom cover toward the back of the unit and lift it out as depicted in figure 2 Disconnect the dome element wiring Remove the dome element support clip in the pan 6 Remove the dome element support clip from the element Remove the dome element mounting screws 8 Remove the dome element from the pan 9 Replace the dome element 10 Replace the dome element support clip 11 Replace the screws that hold the dome element and support clip in place 12 Connect the dome element wiring 13 Install the bottom cover 14 Connect the unit to its power source Economate The dome element is located inside each pan as depicted in figure 7 Make sure you have the correct element for the unit and power source before attempting to change it 1 Disconnect unit from power source 2 Countertop models Go to step 3 Storage base mo
9. he unit as depicted in figure 10 3 Remove the rest of the screws that hold the shelf on the unit Lift the shelf up and away from the unit Replace the shelf with the new one Reinstall the screws Tighten the screws in the slotted holes Insert the new carving board into the mounting studs on the shelf ECONOMATE PLEXIGLAS CANOPY REPLACEMENT Figure 11 Economate Plexiglas Canopy The Plexiglas canopy is mounted to the canopy brackets using rubber grommets ii Service Manual for Electric Open Well Food Warmers 1 Disconnect unit from power source 2 Remove the screws that hold the canopy on as depicted in figure 11 Note If canopy bracket replacement is required they can be removed once the Plexiglas canopy is removed 3 Remove the rubber grommets from the old canopy 4 Remove the protective plastic covering from the new canopy 5 Install the rubber grommets in the new canopy 6 Install the new canopy Note Install new canopy brackets first if replacing them Mounting bolts CAUTION Do not overtighten the screws Overtightened Figure 13 Location of stem bolt in caster AN screws will crack the Plexiglas inserted here 7 Connect the unit to its power source 4 Loosen the bolts that secure the caster Grip the caster snugly and pull it free of the base unit EGONOMATE CASTER REPLACEMENT 6 Place the new caster onto the base of the leg Note Cast
10. k Woodbury Salterton Exeter Devon UK EX5 1EW Tel 01395 234140 FAX 01395 234154 ASIA Asia Office Duke Food Service Equipment Company Limited 1F Building 17 2 658 Nong Jin Zhong Road Shanghai 200335 China Phone 86 21 6876 9272 FAX 86 21 33600628 Please provide the following information when you write or call model number serial number date of purchase your complete mailing address including zip code and description of the problem 15 Service Manual for Electric Open Well Food Warmers I Your Solutions Partner 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 EU Headquarter Office Duke Manufacturing C R s r o Prologis Park D1 West Building 4 Zdebradska 92 Ricany Jazlovice 251 01 Czech Republic Phone 42 0 257 741 033 Fax 42 0 257 741 039 Duke Mfg UK Duke House Unit 10 Greendale Business Park Woodbury Salterton Exeter Devon UK EX5 1EW Tel 01395 234140 FAX 01395 234154 Asia Office Duke Food Service Equipment Company Limited 1F Building 17 2 658 Nong Jin Zhong Road Shanghai 200335 China Phone 86 21 6876 9272 FAX 86 21 33600628 16
11. nd EP models bottom cover 1 Disconnect unit from power source 12 Connect the unit to its power source 2 Remove the screws that hold the bottom cover see figure 2 in place is Service Manual for Electric Open Well Food Warmers INFINITE SWITCH REPLACEMENT Aerohot ASI Model Infinite Switches Figure 3 Location of Infinite Switch Aerohot Drop In ADI models Infinite switches are located in a separate control panel that is mounted to the front of the cabinet Figure 3 depicts an uninstalled ADI unit with the infinite switch control panel Disconnect unit from power source 2 Remove the screws that hold the unit and its Infinite Switch Control Panel 3 Pull the Infinite Switch Control Panel out of the cabinet for servicing 4 Remove the screws that hold the back cover of the switch control panel in place Tag and disconnect the infinite switch wiring Remove the knob Remove infinite switch mounting screws Remove infinite switch from control panel Install replacement infinite switch mounting screws and knob 10 Reference the tags to reconnect the wires to the infinite switch 11 Reinstall the back cover 12 Reinstall the Infinite Switch Control Panel into the cabinet 13 Connect the unit to its power source Economate Figure 4 Location of Infinite Switch Economate Infinite switches are located in a switch pan mounted in the center of
12. ns Again always rub with the grain of the steel for best results CAUTION Never use an acid based cleanser Be sure to clean AY all food products from any stainless surface Many food products contain acid which can deteriorate the finish Common foods include tomatoes peppers and other vegetables Service Manual for Electric Open Well Food Warmers PARTS REPLACEMENT the unit and provide support for it to prevent damage to the wiring harness i 3 Slide the bottom cover toward the back of ALWAYS DISCONNECT THE UNIT FROM Note For easier access tag the power wires ITS POWER SOURCE BEFORE SERVICING disconnect them and remove the bottom cover INFINITE SWITCH REPLACEMENT Aerohot E and EP Model Remove 4 screws Figure 2 Removing bottom cover Tag and disconnect the infinite switch wiring Remove the knob guard if equipped Remove the knob Remove infinite switch mounting screws Remove infinite switch from control panel oO ON oa Install replacement infinite switch mounting Figure 1 Location of Infinite Switch screws knob and knob guard Aerohot E and EP models 10 Reference the tags to reconnect the wires to Infinite switches are located in front on the control ihe ODIO panel below each pan Figure 1 depicts the location 11 Reconnect the power wires and reinstall the of the switches on the Aerohot E a
13. pable of supporting the unit sfully loaded weight For the most efficient operation be sure to provide good air circulation inside and out LEVELING Be sure the floor units are 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 the unit accordingly Make sure the top of the cabinet is level before installing Aerohot drop in or slide in units It may be necessary to shim the unit to make it level STABILIZING Use the leg adjustments to insure that the unit is solid to the floor surface at all contact points Insure that the unit does not rock when pressure is applied to the top corners Units with casters will require spacers to make it level on uneven surfaces Casters must be locked when the unit is in service ELECTRICAL CONNECTION TheAerohot and Economate Electric food warmers are available as 115VAC 208VAC or 236VAC 50 60 Hz dependent on the needs of the customer Portable units are available with a properly rated and wired cord set Direct wiring of units to the power supply must be performed by a certified electrician and should comply with local electrical codes for your municipality is Service Manual for Electric Open Well Food Warmers MAINTENANCE STAINLESS STEEL CARE AND CLEANING Stainless steel contains 70 80 iron
14. ss enne nnn enn nnnn nnne nsn essen senes sensns eenen 9 Carving Board Shelf Replacement 10 Economate Plexiglas Canopy Replacement 10 Economate Caster 11 TROUBLESHOOTING nannte ec en e cor e e RR E E Rc e e Re E E 12 Rie suec 13 Service Manual for Electric Open Well Food Warmers Si 7 7 7 SPECIFICATIONS MODEL DESCRIPTION VOLTAGE SIZE E302 through E305 Stationary Aerohot 115VAC 208VAC amp 236VAC Variable 2 well to 5 well EP302 through EP305 Portable Aerohot 115VAC 208VAC amp 236VAC Variable 2 well to 5 well ADITE through ADISE Aerohot Drop In 115VAC 208VAC amp 236VAC Variable 1 well to 5 well ASME through ASISE Aerohot Slide In 115VAC 208VAC amp 236VAC Variable 1 well to 5 well Economate OPAH2 through OPAH4 115VAC 208VAC amp 236VAC Variable 2 well to 4 well INSTALLATION LOCATION The food warmers represented in this manual are 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 stationary units or cabinet drop in or slide in units if necessary to provide for maximum loading Portable units EP series Aerohot and Economate should be placed on a level surface ca
15. the unit s front panel Figure 4 depicts the location of infinite switches on all Economate models Disconnect unit from power source 2 Remove the four screws that hold the switch pan in place 3 Carefully pull the switch pan forward until it is free of the unit CAUTION Don t pull the wiring too tightly as the pan is pulled out Tag and disconnect the infinite switch wiring Remove the knob Remove infinite switch mounting screws Remowve infinite switch from switch pan Install replacement infinite switch mounting screws and knob 9 Reference the tags to reconnect the wires to the infinite switch 10 Reinstall the switch pan 11 Connect the unit to its power source Service Manual for Electric Open Well Food Warmers iii ELECTRONIC THERMOSTAT REPLACEMENT Aerohot ASI Model Thermostats Figure 5 Location of electronic thermostat Aerohot Slide In ASI models Thermostats are located in front on the control panel below each pan Figure 5 depicts the location of the electronic thermostat Disconnect the unit from its power source Slide the unit out of its cabinet 3 Turn the unit upside down and remove the screws that hold the bottom cover in place 4 Slide the bottom cover toward the back of the unit and lift it out as depicted in figure 2 5 Tag and disconnect the electronic thermostat wiring Remove the knob Remove the electronic thermostat

Service Manual ELECTRIC OPEN WELL FOOD WARMERS

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