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Service Manual

AHPO / EPO

PROOFER OVEN

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.

Reproduction without written permission is prohibited. Duke is a registered

trademark of the Duke Manufacturing Co.

Duke Manufacturing Co.

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 512981B

BAKING CENTER

MODELS
AHPO-6/18

EPO-3/9

Содержание AHPO-18

Страница 1: ...y 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 2009 Duke Manufacturing Co All rights reserved Reproduction without written permission is prohibited Duke is a registered trade...

Страница 2: ... stated on the model label The external wiring interface must be installed as per the local AC wiring codes Always lockout tagout the unit from the main AC power source before removing any sheet metal panels or attempting to service this unit Failure to comply to this procedure may cause property damage injury or death Improper installation adjustment alteration service or maintenance can cause pr...

Страница 3: ...ONTROL PANEL COOLING FAN 10 PROOFER LIGHTS CIRCUIT BREAKER 10 BUZZER 11 OVEN POWER SWITCH 12 OVEN THERMOSTAT 12 OVEN TIMER 12 PROOFER POWER SWITCH 13 PROOFER THERMOSTAT 13 PROOFER HUMIDITY CONTROL 14 PROOFER TIMER 14 PROOFER HEAT ELEMENTS 15 PROOFER HUMIDITY ELEMENT 15 PROOFER CIRCULATION FAN 16 OVEN HEAT ELEMENTS 17 OVEN CIRCULATION FAN 17 OVEN HI LIMIT THERMOSTAT 18 DOOR GASKET REPLACEMENT 18 OV...

Страница 4: ...cific operating instructions refer to the Owner s Manual 502821A CLEANING For specific instructions refer to the Owner s Manual 502821A TOOLS STANDARD Standard set of hand tools VOM with AC current tester Any quality VOM or DVM with a sensitivity of at least 20 000 Ohms per Volt can be used Aladderorotherappropriateitemtostandon ifservicing the top of the unit ...

Страница 5: ...230 220 240 1 60 6650 32 0 230 220 240 1 50 6650 32 0 230 220 240 3 60 6650 16 7 230 220 240 3 50 6650 16 7 400 380 415 3N 60 6650 16 7 400 380 415 3N 50 6650 16 7 U S Patent Other US and Foreign Patents Pending Model AHPO or EPO Shipping Weight Carton Box 625 lbs 284 kg Shipping Weight Wooden Crate 760 lbs 345 kg AHPO EPO ...

Страница 6: ...rvice Notes Thisunituseswatertraysforhumiditycontrol Remove any water that might be present in the trays before attempting service of any kind Duringitsinstallation thisunitisrequiredtobesecuredto the building structure There is also a Restraining Device aheavy flexiblemetalcable thatwasinstalledtoprevent the unit from moving beyond a certain distance in order to prevent damage to the electrical c...

Страница 7: ... 4 Remove the Oven Fan Wire Harness Cover to gain access to the wiring harness and connections Figure 3 Oven Fan Cage and Wire Harness Cover Proofer Floor Panel Disconnect the electrical power to the unit and follow lockout tagout procedures 1 Remove screws securing the Proofer Floor Panel 2 Slide the panel out through the front of the unit being careful not to damage the fan blades Access to the ...

Страница 8: ... assembly away from the cabinetwhileobservingclearancesofthewiringaround the controls All of the Operator Controls and related wiring are now accessible DO NOT power on the unit while the Control Panel is removed from the cabinet 3 To troubleshoot for problems use visual checks an Ohmmeter theproperSchematicandIllustrationspages for the version of the unit being serviced Figure 6 Components on Lef...

Страница 9: ...g them Refer to the Electrical Schematic at the end of this manual for additional information and a complete wiring diagram 1 Remove the AC Connect Block Cover Plate The AC Connect Block Cover Plate is located to the right of the Control Panel Cooling Fan on the right side of the unit 2 Referring to Figure 9 use a voltmeter to check for the presence of voltage If aluminum AC supply wire is present...

Страница 10: ...ice ensureitisoperatingcorrectly CONTROL PANEL COOLING FAN Disconnect the electrical power to the unit and follow lockout tagout procedures This fan is mounted to a ventilated metal panel to the right of the Operator s Control Panel and on the right hand side of the unit When this panel is removed you will also have access to the Hi Limit Thermostat AC Power Contactor and on the later units the Ha...

Страница 11: ...toneendofthejumperwiretotheterminalstrip 12 Connecttheotherendofthejumperwiretotheremaining terminal on the circuit breaker 13 Attach the assembled Access Panel to the unit 14 Restorepowertotheunitandcheckforproperoperation Also observe fan for proper rotation BUZZER Disconnect the electrical power to the unit and follow lockout tagout procedures TheBuzzerismountedontheControlPanel Itsexactpositio...

Страница 12: ...etain the screws for reuse 5 Tag and disconnect the Oven Thermostat wires Oven Thermostat Figure 16 Location of Oven Thermostat 6 RemovetheThermostatBulbfromitswireformsupport in the top of the oven Thermostat Bulb Figure 17 Oven Thermostat Bulb It may be necessary to remove the right side Rack Panel from the inside of the oven to remove the Thermostat Bulb 7 ReversethisproceduretoinstallanewOvenT...

Страница 13: ...ct Proofer Power Switch wires Proofer Power Switch Figure 19 Location of Proofer Power Switch 4 Reverse the procedure to install a new Proofer Power Switch PROOFER THERMOSTAT Disconnect the electrical power to the unit and follow lockout tagout procedures 1 Unscrew the Control Panel refer to the COVERSAND PANELSsectionofthismanualforspecificinstructions 2 Remove the Proofer Floor Panel refer to th...

Страница 14: ...idity Control Knob 3 Remove the screws securing the Proofer Humidity ControltotheControlPanel Retainthescrewsforreuse 4 Tag and disconnect Proofer Humidity Control wires Proofer Humidity Control Figure 22 Location of Proofer Humidity Control 5 ReversethisproceduretoinstallanewProoferHumidity Control PROOFER TIMER Disconnect the electrical power to the unit and follow lockout tagout procedures 1 Un...

Страница 15: ...nt 4 Remove the Humidity Pan 5 Remove the Proofer Floor Panel Refer to the COVERS AND PANELS section of this manual for specific instructions 6 Removetwoscrews oneateachendoftheHeatElement Retain the screws for reuse Heat Elements Figure 26 Location of Proofer Heat Elements 7 Pull the Proofer Heat Element away from the back wall 8 ReversetheproceduretoinstallthereplacementProofer Heat Element Tigh...

Страница 16: ...orque PROOFER CIRCULATION FAN Disconnect the electrical power to the unit and follow lockout tagout procedures The Proofer Circulation Fan is located in the floor of the Proofer The floor panel must be removed to gain access to the Proofer Circulation Fan 1 Remove the Humidity Pan 2 Remove the Proofer Floor Panel Refer to the COVERS AND PANELS section of this manual for specific instructions 3 Rem...

Страница 17: ...peat these steps on the remaining Element if needed 8 Reverse these steps to install a new Element Tighten the Heat Element connection to 30 inch pounds torque If there is high temperature silicone caulking around the Heat Element ends where they pass though the top wall this caulking may be damaged when removing a Heat Element and should be replaced as needed during reassembly OVEN CIRCULATION FA...

Страница 18: ...s 5 ReversetheseprocedurestoinstallanewOvenHi Limit Thermostat DOOR GASKET REPLACEMENT Disconnect the electrical power to the unit and follow lockout tagout procedures 1 Remove the old gasket by pulling it out of the groove in the door frame 2 Cleanthegroovewithascrewdriverorotherflat bladed tool to remove any dirt or gasket pieces 3 Press the new gasket into the groove Make sure it is fullyseated...

Страница 19: ...ed removethehingecoversandloosen don t remove the six screws that hold the hinges to the door 2 With the screws loosened the door can be moved in and out on its frame Move the door to the desired position When adjusting the door s position in and out don t over compress the gasket This will cause the door to bind on the hinge side 3 Once the door is positioned properly tighten the screws and repla...

Страница 20: ...e to seal any gap between the gasket and the oven front near the handle 4 Tighten the screws Gasket is slightly compressed Figure 38 Proper Door Handle Side Adjustment 5 Perform the DOOR GASKET COMPRESSION CHECK 6 If needed repeat the above procedure or go to the AIR WASH DOOR ADJUSTMENT HINGE SIDE procedure 7 If the Door Handle Adjustment Slots become exposed use Silicone Sealer to seal the openi...

Страница 21: ...ss steel surface First thoroughly clean rinse and dry the surface Then on a daily basis apply a high quality stainless steel polish according to manufacturer s instructions Heat Tint Darkenedareas calledheattint mayappearonstainlesssteel exposedtoexcessiveheat whichcausestheprotectivefilmto thicken Itisunsightlybutisnotasignofpermanentdamage To remove heat tint follow the routine cleaning procedur...

Страница 22: ...ill Humidity Pan Adjust Humidity Control until proper humidity is achieved Replace Humidity Element Replace Humidity Control Adjust Humidity Control until proper humidity is achieved Replace Humidity Control Turn Oven Power Switch to ON position Adjust Thermostat to proper setting Replace Oven Thermostat Replace Oven Heat Elements Ensure Oven Door is properly closed Turn power off and clean debris...

Страница 23: ...LOW ALL WIRES BLACK UNLESS NOTED WIRE AWG 3 14 2 5 8 9 10 11 16 ALL OTHERS 18 BLACK BROWN BLUE BLUE C 4 8 DOOR SWITCH OPEN POSITION BLU BLK a b 12V b0 b a a1 3 N 3 L 3 1 N L G 4 5 N 3 L 3 1 5 1 2 2 L 1 L 4 2 5 L L 1 2 3 2 L 1 L 4 2 208 240V 1 208 240V 3 380 415V 3N 12 HI LIMIT THERMOSTAT OVEN ELEMENT OVEN ELEMENT CONTACTOR OVEN THERMOSTAT OVEN LAMPS HUMIDITY ELEMENT PROOFER ELEMENTS PROOFER THERMO...

Страница 24: ...Service Manual for AHPO EPO Proofer Oven 24 Duke Manufacturing Co 2305 N Broadway St Louis MO 63102 Phone 314 231 1130 Toll Free 1 800 735 3853 Fax 314 231 5074 www dukemfg com ...

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