SERVICE MANUAL
Contents
1. 22385 Fig 15 4 Disconnect heating element leads from 1CON and 2CON noting their locations x T 81148 s ty SIEMENS 0 A2AF3SAF Fig 18 2 Partially install heating element assembly then mount high limit thermostat bulb and bracket to assembly A Apply thermal transfer compound between high limit bulb and heating element assembly Fig 16 3 Install heating element assembly Push element assembly towards front of machine Page 9 of 27 F25386 0415 C24EO SERIES ELECTRIC COUNTERTOP STEAMERS REMOVAL AND REPLACEMENT OF PARTS 4 Connect lead wires to 1CON and 2CON in noted positions 5 Check steamer for proper operation MANUAL DRAIN VALVE x WARNING Disconnect the electrical power to the machine and follow lockout tagout procedures 1 Remove right SIDE PANEL and REAR PANEL 2 Remove pin and washer to disconnect the handle linkage from linkage bracket Fig 19 3 Remove nut and linkage bracket 2 MANUAL WL Ga DRAIN 52 VALVE LINKAGE BRACKET va 74 Fig 20 Remove drain valve Reassemble parts removed reverse order of removal A Apply pipe thread sealant to plumbing threads before assembly F25386 0415 6 Check steamer for leaks and proper operation DOOR x WARNING Disconnect the electrical power to the machine and follow lockout tagout procedures 1 Close door 2 Remove left SIDE P2. NOTICE Do not sharply bend and kink or clamp SCREWS down on the capillary tube or damage may occur Fig 11 1 Remove right SIDE PANEL 6 Remove high limit thermostat 2 Disconnect lead wires from high limit 7 Reverse procedure to install and check steamer for proper operation Apply a small amount of thermal transfer compound between capillary bulb and heating element assembly NOTE Do not clamp bulb with excessive force 22368 Page 7 of 27 F25386 0415 C24EO SERIES ELECTRIC COUNTERTOP STEAMERS REMOVAL AND REPLACEMENT OF PARTS LOW WATER THERMOSTAT 1 Remove right SIDE PANEL and REAR PANEL 2 Disconnect lead wires LOW WATER THERMOSTAT 22375 Fig 12 Remove low water thermostat 4 Reverse procedure to install and check steamer for proper operation A Apply small amount of thermal transfer compound to tip of thermostat B Apply Loctite 242 to threads of thermostat Install thermostat hand tight Do not over tighten TEMPERATURE PROBE ky NY AN A WARNING Disconnect the S electrical power to the machine and follow lockout tagout procedures 2 1 Remove right SIDE PANEL and REAR PANEL 2 Disconnect probe leads from the temperature control F25386 0415 TEMPERATURE 3 Remove temperature probe from steam vent pipe 4 Reverse procedure to install replacement probe and check steamer for proper operation 5 Adjust temperature cont
3. ELECTRICAL OPERATION ELECTRICAL OPERATION COMPONENT FUNCTION gt 2 Creates audible signal when timed cook cycle is complete and when a low water condition exists Limiting Contactor Supplies line voltage to heating element assembly Energized whenever Power Switch 1 15 is on and High Limit Thermostat 1TAS Low Water Thermostat 2TAS closed Regulating Contactor Supplies line voltage to heating element assembly Energized whenever Hold 2 Thermostat 3TAS is closed or the temperature controller calls for heat Heating Element Located below water reservoir Heats water to produce steam Fuses 1FU amp 2FU Protect control circuitry from over currents Low Water Light Amber AM colored light Lit when Low Water Thermostat 2TAS senses water level is VET iced reese too low inside steamer On Light 217 Amber AM colored light Lit wnen Power Switch 1S is on Cook Light 3LT Red RD colored light Lit when High Limit 1TAS and Low Water 2TAS thermostats are closed door is closed and timer is set Relay 1 Controls Regulating Contactor 2CON based on input from Hold Thermostat 3TAS and Temperature Controller Does not allow Timer Motor to run while Hold Thermostat 3TAS is closed Relay 2 Latches Power Switch 1S circuit Turns on Low Water Light 1LT and Buzzer when steamer i
4. TRANSFORMER RELAYS i KIKS gt TEMPERATURES CONTROLLER 822370 Fig 38 SEQUENCE OF OPERATION SCHEMATIC DIAGRAM AI2851 will be used to explain the electrical sequence of operation Timed Cooking Mode 1 Conditions A Steamer connected to correct voltage and is properly grounded B Power switch 1S off 1 Relay K3 energized K3 N C contacts open High limit thermostat closed Hold thermostat closed Low water thermostat closed Temperature control is setup properly and is ready to use Page 19 of 27 G Door closed door switch closed Timer off Cooking compartment filled to the water level mark and below hold temperature of 175 F 5 F J Drain valve is closed drain lever pushed in 2 Press momentary start switch 1S A Limiting contactor 1CON coil energized thru high limit thermostat 1TAS 1 Line voltage is supplied to one side of heating elements B Relay K2 coil energized thru low water thermostat 2TAS 1 K2 1 N O contacts close a Power switch circuit is latched 2 K2 2 N C contacts open a Low water light 1LT and buzzer are de energized indicator light 2LT amber comes on D Relay 1 coil energized thru door switch and hold thermostat 3TAS 1 1 3 N O contacts close and regulating contactor 2CON coil is energized a Line voltage is supplied to other side of heating elements
5. E clip INSTALLATION 1 Install latch assembly onto inner door panel with spring pin toward bottom of door panel A Apply Loctite 271 to threads of screws before assembly and secure latch assembly to inner door panel HEADS OF PINS LATCH ASSEMBLY Page 13 of 27 2 Install outer door housing assembly as outlined in DOOR HANDLE INSTALLATION 3 Check opening and closing operation of door 4 Check steamer for proper operation and leaks around door seal DOOR HINGE BEARINGS 1 Close door 2 Remove left side panel see COVERS AND PANELS 3 Remove nuts from upper hinge located inside front panel UPPER HINGE 10621 Fig 33 4 Open door slightly and while holding door pull upper hinge away from front panel Pull upper hinge out of upper door hinge bearing 5 6 Lift door assembly up and off lower door hinge 7 Pry hinge bearing out from door assembly 8 Remove outer door housing NOTICE Do not drive bearing into place The inner door panel could be damaged Press bearing into position NOTE When replacing door hinge bearings replace both hinge bearings 9 Position replacement hinge bearing over hinge opening in door assembly F25386 0415 C24EO SERIES ELECTRIC COUNTERTOP STEAMERS REMOVAL AND REPLACEMENT OF PARTS HINGE BEARING Fig 34 A Press hinge bearing fully into door assembly using a C clamp or equivalent 10 Reassemble parts removed in reverse o
6. Elements heat 2 K4 2 N C contacts open 3 1 1 contacts open prevents timer from being energized during preheat 3 Steamer reaches 175 F A Hold thermostat opens and relay K1 coil is de energized 1 1 3 N O contacts close and remove line voltage to heating element assembly 2 1 1 and 1 2 contacts return to close condition NOTE Steamer will maintain hold temperature until a cook time is dialed on timer door is opened or power switch is turned off 4 Set cook timer to desired time NOTE Timer motor will not run when hold thermostat 3TAS is below 175 F F25386 0415 C24EO SERIES ELECTRIC COUNTERTOP STEAMERS ELECTRICAL OPERATION A Timer contacts close timer motor is energized and timing down begins NOTE Additional time can be set or the cook timer can be turned off throughout the cooking cycle If turned to off steamer reverts to hold temperature B Cook light 3LT red comes on C Temperature controller energized and evaluates input from thermocouple 1 If temperature is below set point temperature controller internal N O contacts close and energize regulating contactor 2CON coil thru K1 2 N C contacts a Line voltage is supplied to other side of heating elements Elements heat 5 Temperature reaches set point and the temperature control s internal N O contacts open A Regulating contactor 2CON coil deenergized and power is removed fr
7. RevB Fig 40 F25386 0415 22 of 27 C24EO SERIES ELECTRIC COUNTERTOP STEAMERS ELECTRICAL OPERATION WIRING DIAGRAMS HEATING ELEMENTS C24EO3 208V 240V TO CONTROL 3 PHASE 208 240V TRANSFORMER LIMITING CONTACTOR acon 17 HEATING ELEMENTS 1664W 208V 12667W EA 240V 12003W EA 208V NOT USED FOR L 240V OPERATION _ TO CONTROL TRANSFORMER ELEMENTS 1CON 5 lt Li 12003W 208V 2667W EA 240 REGULATING CONTACTOR 2CON NOT USED FOR 1 240 OPERATION _ FOR OPERATION FROM 208V SUPPLY ALL 6 ELEMENTS ARE BE CONNECTED AS SHOWN FOR 240V SUPPLY DISCONNECT AND INSULATE ELEMENT LEADS WITH ORANGE GREEN AND RED MARKERS PRIMARY TAPS OF CONTROL TRANSFORMER MUST BE CONNECTED ACCORDING TO THE APPLIANCE DATA PLATE VOLTAGE MARKING AND ACTUAL CONNECTED SUPPLY DERIVED FROM 00 857591 3 Rev 24 208V 240V 24 5 2081 2401 Page 23027 F25386 0415 C24EO SERIES ELECTRIC COUNTERTOP STEAMERS ELECTRICAL OPERATION TO CONTROL 5 3 PHASE 208V TRANSFORMER A 3 PHASE 240V LIMITING mi 1CON HEATING ELEMENTS TO CONTROL 1 PHASE 208V TRANSFORMER 1 PHASE 240V TIO OLE Bi kan en LT HEATING ELEMENTS PRIMARY TAPS OF CONTROL TRANSFORMER MUST BE CONNECTED ACCOR
8. close cook light A Timer contacts 21 8 23 open cook light 3LT red comes on 3LT red goes out and temperature controller is de energized B Temperature controller energized and 9 evaluates input from thermocouple B Steamer reverts to hold temperature and continues to cycle until a cook time is dialed on timer power switch is turned to off or the door is opened 1 If temperature is below set point temperature controller internal N O contacts close and energize regulating contactor 2CON coil thru K1 N C NOTE If water level becomes low during cycling low contacts water thermostat 2TAS will open and low water light a Line voltage is supplied to other 1LT amber will come on and buzzer will sound side of heating elements Elements heat 5 Temperature reaches set point and the temperature control s internal N O contacts open Page 210f27 F25386 0415 C24EO SERIES ELECTRIC COUNTERTOP STEAMERS ELECTRICAL OPERATION SCHEMATIC DIAGRAM PRIMARY TAPS OF CONTROL TRANSFORMER MUST BE CONNECTED ACCORDING TO THE APPLIANCE DATA PLATE AND THE ACTUAL CONNECTED SUPPLY CONTROL TRANSFORMER 11 COM 208V 240V 480V RELAY K3 START RESET MOM LIMITING HIGH LIMIT CONTACTOR 1CON 1TAS LOW WATER RELAY K2 2TAS 13 COOK 3LT CONTACTS TIMER MOTOR TEMPERATURE CONTROLLER REGULATING K1 2 CONTACTOR 2CON HOLD T STAT RELAY K1 3TAS O DERIVED FROM 857590 1
9. w am ei du dae anti elan and ate an td TIMED COOKING MODE at da poke de a a Dee dan CONSTANT COOKING MODE 17 7 2 2 2 2 27 SGHEMATIC DIAGRAM 2225228 lir apa lo wed anatase ao a ja apa are aran ap tea ot WIRING DIAGRAMS HEATING ELEMENTS 2 2704420 2 24 03 208V 2AON gal kn se ks Ac ten ia GZ4EOS 208V 240M pon tal ae ae GZ4EOS 48OM e ata ka te ate acca TROUBLESHOOTING rani a aa e Gal pak dp ai Shaheen wig Aaah Gee TROUBLESHOOTING eee edie pa a na ea ea VULCAN 2015 F25386 0415 gt gt 2 027 C24EO SERIES ELECTRIC COUNTERTOP STEAMERS GENERAL GENERAL INSTALLATION OPERATION AND CLEANING Refer to the Installation amp Operation Manual for specific instructions INTRODUCTION Features Requires no water or drain line connections manual fill amp manual drain Cast aluminum element block for efficient heat transfer and distribution Field convertible to single phase or three phase p
10. 4 hod asid l kep ava n beak da azi aaa aa HEATING ELEMENT ASSEMBLY cms tu aa a e akte ot REMOVAL aa ate wade ea pede ad n eae Res eee kd w e DOOR HANDLE a kip a e ta an et teehee a Mian DOOR LATCH ASSEMBLY 2 osans ia via n dantan an ak ed a ea n st tj a ai kd ze DOOR HINGE BEARINGS aan aba Ba y fa haan ala SERVICE PROCEDURES AND ADJUSTMENTS 2 2 2 42 42 2 2 272 DOOR LATCH ADJUSTMENT pirina dia Se e ei at an CAN OPENING A JAMMED DOOR 2 n ra a aw A ka a a po At whedon defen De m n ga gs HEATING ELEMENT TEST tte lapa malon t Vase a al hea apa tek pt TEMPERATURE CONTROL CALIBRATION 2 2 1 420240 ELECTRICAL OPERATION en kanta ba kot e aa e e a l a or an a ka ka ead dy ip oh dra COMPONENT FUNCTION wc ki tected de ai ana a rete Bak aie ann ant sofa Penge Pipa aka COMPONENT LOCATION eda EE
11. 4 INTRODUC TION aa ked Sin ete e tiwa ab sa tate ach nae kaa Mast naga ta re ean FEATURES iia pai ee aaa AEAEE We a cade Ak A av e STEAM COOKING awa inite den a va yi aye era a a ad a ei ay MODEL DESIGNATIONS sid EXTERIOR DIMENSIONS i tan ga aaa SPECIFICATIONS awa rada Bondie dede vi At A TOOLS 255 bate e teens seh ans a Date ao REMOVAL AND REPLACEMENT OF PARTS 22 2 2 2 22 COVERS AND PANELS a m e dude Guia ne am e COMPONENT PANEL COMPONENTS 44 1 TIMER n a n sigs A a Da n en deel maye HOLD THERMOSTAT its ai da ak yan a pc n diy wae dea aden Sloe ts mat RARA n KIGH LIMIT THERMOSTAT adan dad it elan ip ea eat RA LOW WATER THERMOSTAT visite ana wa a outa n an ade pala date TEMPERATURE PROBE 4
12. 9 Amperage values in the table are nominal Tolerance is 5 10 24 Shipped for 208V 60 50 HZ 3 phase connection Field convertible to 240V three phase or 208 240V single phase See wiring diagram 2853 NOTES HC24E05 Shipped for 208V 240V or 480V 60 50 HZ 3 phase 208V and 240V models are field convertible to 1 phase See wiring diagram LINK to 12852 TOOLS Standard Standard set of hand tools Clear silicone sealant VOM with an AC current tester any quality VOM with a sensitivity of at least 20 000 ohms per volt can be used Temperature meter amp thermocouple Special Thermal Transfer Compound Dow Corning 340 Part No 819643 2 13 5 oz tube or equivalent for heating element assembly Thermal Transfer Compound Dow Corning 340 Part No 519504 2 oz tube or equivalent for thermostats e Torque wrench in lb F25386 0415 C24EO SERIES ELECTRIC COUNTERTOP STEAMERS GENERAL Tile Trowel 3 16 x 5 32 V notch Grainger catalog stock number 5LGOS or equivalent for coating heating element assembly with thermal transfer compound e Loctite ODC Free Cleaner and Degreaser McMaster Carr Part No 66415A21 or equivalent fast drying no residue cleaner Loctite 7471 Primer N Part 544434 2 Loctite 271 or equivalent Loctite 242 Part No 520228 for threads of door screws RTV 109 for securing gasket to d
13. ANEL 3 Remove nuts from upper hinge located inside front panel UPPER HINGE 10621 4 Open door slightly and while holding door pull upper hinge away from front panel 5 Pull upper hinge out of upper door hinge bushing 6 Lift door assembly up and off lower door hinge 7 Reinstall parts removed in reverse order of removal 8 Check door for fit and proper sealing of gasket DOOR GASKET ky A WARNING Disconnect the Se electrical power to the machine and SS 2S follow lockout tagout procedures V 1 Open door 2 Remove the shoulder screws and pan pusher bracket from gasket plate Page 10 of 27 C24EO SERIES ELECTRIC COUNTERTOP STEAMERS REMOVAL AND REPLACEMENT OF PARTS GASKET PLATE Remove gasket plate Remove gasket from inner door panel Remove RTV from bottom part of inner door panel Apply new RTV 109 to bottom of door where shown when assembling gasket to door RTV 109 10612 Fig 23 6 Place a small amount of RTV109 into the inner door panel gasket screw holes before assembly 7 Position the new gasket on gasket plate and reverse procedure to install DOOR HANDLE x WARNING Disconnect the electrical power to the machine and follow lockout tagout procedures REMOVAL 1 Open door 2 Remove screws from top and bottom of door assembly Page 11 of 27 PAN PUSHER BRACKET Fig 24 3 Pull outer door housing away from inner door panel s
14. DING TO THE APPLIANCE DATA PLATE VOLTAGE MARKING AND ACTUAL CONNECTED SUPPLY DERIVED FROM 00 857591 1 Rev B 24 5 208V 240V 24 5 480V 25386 0415 Page 24 of 27 C24EO SERIES ELECTRIC COUNTERTOP STEAMERS ELECTRICAL OPERATION TO CONTROL TRANSFORMER 3 PHASE 480V HEATING JOH REGULATING CONTACTOR PRIMARY TAPS OF CONTROL TRANSFORMER MUST BE CONNECTED ACCORDING TO THE APPLIANCE DATA PLATE VOLTAGE MARKING AND ACTUAL CONNECTED SUPPLY Y 1CON 11 71 CON L2 T2 2CON T2 L2 A T3 L3 2CON T1 L1 1CON L3 T3 2 DERIVED FROM 857591 2 Rev Al2854 24 5 480V Page 25 of 27 F25386 0415 C24EO SERIES ELECTRIC COUNTERTOP STEAMERS TROUBLESHOOTING TROUBLESHOOTING TROUBLESHOOTING Compartment leaks water around door Steam leaks around door Steamer will not heat cook light off low water light off Steamer will not heat cook light on low water light off Timer motor does not run Door not closing properly Door won t open Buzzer not operating Water spraying out of steam vent pipe during a cook cycle F25386 0415 POSSIBLE CAUSES 1 Steamer not level 2 Steamer overfilled Worn gasket Damaged gasket Steam vent pipe blocked 4 Door not adjusted Line voltage incorrect or transformer malfunction Control circuit fuse s open High limit thermostat open Door open or door switch
15. SERVICE MANUAL C24EO SERIES ELECTRIC COUNTERTOP STEAMERS C24EO3 ML 136006 C24EO5 ML 136007 C24EO5 NOTICE This Manual is prepared for the use of trained Vulcan Service Technicians and should not be used by those not properly qualified This manual is not intended to be all encompassing If you have not attended a Vulcan Service School for this product you should read in its entirety the repair procedure you wish to perform to determine if you have the necessary tools instruments and skills required to perform the procedure Procedures for which you do not have the necessary tools instruments and skills should be performed by a trained Vulcan Service Technician The reproduction transfer sale or other use of this Manual without the express written consent of Vulcan is prohibited This manual has been provided to you by ITW Food Equipment Group LLC ITW FEG without charge and remains the property of ITW FEG and by accepting this manual you agree that you will return it to ITW FEG promptly upon its request for such return at any time in the future A product of Vulcan Hart 3600 North Point Blvd Baltimore MD 21222 F25386 0415 C24EO SERIES ELECTRIC COUNTERTOP STEAMERS TABLE OF CONTENTS GENERAL 2 55 a Manian a a de vv ti ite bin wdfn iad bad leh INSTALLATION OPERATION AND CLEANING 4 2 4 2 2 2 2 20
16. SSEMBLY Disconnect the 9 S electrical power to the machine and S follow lockout tagout procedures s SI REMOVAL AND DISASSEMBLY F25386 0415 1 Separate outer door housing assembly from inner door panel as outlined under DOOR HANDLE 2 Remove screws securing latch assembly to inner door panel and remove latch mechanism LATCH MECHANISM SCREWS Fig 28 3 Remove E clip from latch assembly pins and pull pins from latch mechanism Fig 29 4 Remove retaining pin from spring pin 5 Separate sliding bracket from stationary bracket STATIONARY BRACKET ASSEMBLY Page 12 of 27 C24EO SERIES ELECTRIC COUNTERTOP STEAMERS REMOVAL AND REPLACEMENT OF PARTS 1 Apply Lubriplate 630AA to sides of sliding bracket 2 Insert spring pin into bottom of sliding bracket A Place spring over spring pin Assemble sliding bracket into stationary bracket While holding head of spring pin against bottom of sliding bracket insert spring pin into keeper hole in bottom of stationary bracket SPRING PIN LUBRICATE Z SLIDING BRACKET KEEPER HOLE FOR SPRING PIN Fig 31 A Secure spring pin in place with retaining pin NOTE Install pins such that heads of pins will be facing inward toward hinge side of inner door panel when latch assembly is installed 5 Install pins to assemble stationary and sliding brackets together A Secure pins into position with
17. a thermocouple approximately one inch down in the center of steam vent pipe Turn steamer on by selecting constant mode Allow steamer temperature to stabilize by completing two heating cycles Record the temperature reading when cook light goes out Using the elevation table compare the recorded temperature to the temperature listed for the specific elevation C24EO SERIES ELECTRIC COUNTERTOP STEAMERS SERVICE PROCEDURES AND ADJUSTMENTS NOTE Use temperature scale on control dial plate for reference only The scale represents dial turns in 1 F increments not the actual temperature When calibrating use the recorded temperature taken from thermocouple ELEVATION FT TEMPERATURE F 1 000 208 2 000 206 3 000 204 4 000 202 9 000 or above A Ifthe set point temperature of the control is correct no adjustment is necessary 5 000 200 Ifthe set point temperature of the control is not correct adjust the temperature control 1 the temperature control dial clockwise to increase temperature or counterclockwise to decrease temperature NOTE During temperature control adjustment display will blink on off When display reverts to a steady image that displayed temperature set point has been locked in to memory le Mi li L TEMPERATURE DISPLAY FOR REFERENCE ONLY A RANGE 190 TO215F Fig 37 Page 17 of 27 F25386 0415 C24EO SERIES ELECTRIC COUNTERTOP STEAMERS
18. er off H Cooking compartment filled to the water level mark and below hold temperature of 175 F 5 F Drain valve is closed drain lever pushed Press momentary start switch 1S A Limiting contactor 1CON coil energized thru high limit thermostat 1TAS 1 Line voltage is supplied to one side of heating elements B Relay K2 coil energized thru low water thermostat 2TAS 1 K2 N O contacts close a Power switch circuit is latched 2 K2 contacts open a Low water light 1LT and buzzer are de energized indicator light 2LT amber comes on D Relay 1 coil energized thru door switch and hold thermostat 3TAS 1 1 N O contacts close and regulating contactor 2CON coil is energized a Line voltage is supplied to other side of heating elements Elements heat 2 K141 contacts open Steamer reaches 175 F A Hold thermostat opens and relay K1 coil is de energized C24EO SERIES ELECTRIC COUNTERTOP STEAMERS ELECTRICAL OPERATION K1N C contacts close and contacts A Regulating contactor 2CON coil open deenergized and power is removed from NOTE Steamer will maintain hold temperature until nealing elements a cook time is dialed on timer door is opened or 6 Steamer cycles on the temperature control until power switch is turned off cook timer turned off 4 Set cook timer to constant 7 cook timer off A Timer contacts 21 8 23
19. ig 5 Remove component Reverse procedure to install replacement component and check steamer for proper operation NOTE If replacing temperature control see in SERVICE PROCEDURES AND ADJUSTMENTS TIMER W K S Disconnect the S electrical power to the machine and SA follow lockout tagout procedures f 1 Remove right SIDE PANEL 2 Disconnect lead wires to timer F25386 0415 3 Remove timer knob 4 Remove rotary shaft seal from timer shaft and remove timer ROTARY SHAFT SEAL 10707 Fig 7 5 Reverse procedure to install and check steamer for proper operation HOLD THERMOSTAT A WARNING Disconnect the electrical power to the machine and follow lockout tagout procedures 1 Remove right SIDE PANELS 2 Remove lead wires and mounting nuts Page 6 of 27 C24EO SERIES ELECTRIC COUNTERTOP STEAMERS REMOVAL AND REPLACEMENT OF PARTS MOUNTING 3 Remove thermostat from mounting bracket 4 Remove screw and heat shield to access capillary bulb Fig 8 Remove hold thermostat SCREW 4 Apply a small amount of thermal transfer compound to the mating surface disk side of the 19510 replacement thermostat 5 Loosen screws securing capillary bulb A Spread the compound completely and d H evenly over the surface of the thermostat 2 Je 5 Reverse procedure to install and check steamer for proper operation HIGH LIMIT THERMOSTAT
20. malfunction Power switch off or inoperative Relay K3 malfunction Timer malfunction or timer off timed mode only Line voltage incorrect Heating element malfunction Regulating contactor malfunction Relay K1 malfunction Temperature probe malfunction Temperature controller malfunction Door open or door switch malfunction High limit thermostat open Low water thermostat open 4 Timer inoperative Door latch assembly 1 Timer malfunction Temperature control set point too high 1 2 3 1 2 3 4 5 6 7 1 2 3 4 5 1 2 3 1 1 2 Temperature probe malfunction 3 Temperature control malfunction Page 26 of 27 C24EO SERIES ELECTRIC COUNTERTOP STEAMERS TROUBLESHOOTING SYMPTOM POSSIBLE CAUSES Temperature control set point too high Temperature probe malfunction High water usage Temperature control malfunction Steamer operating in constant mode Door left open between loads Excessive or inconsistent cook times Temperature control set point too low Heating element malfunction Page 27 of 27 F25386 0415
21. mounting hole 3 Open door and check striker slot for horizontal alignment The slot on striker must be kept horizontal in order for door latch to catch properly and latch 4 Once proper slot alignment has been set hold striker close to its base then tighten the striker nut Be careful not to damage striker slot when tightening or door may not latch properly NOTE Do not over tighten nut If over tightened striker may turn and change alignment NOTE If door does not open easily add shims between striker and cabinet front When adding shims make certain that door gasket seals properly and steamer does not leak Remove shims as necessary until leaking stops F25386 0415 C24EO SERIES ELECTRIC COUNTERTOP STEAMERS SERVICE PROCEDURES AND ADJUSTMENTS HEATING ELEMENT TEST The heating element assembly contains elements molded into a cast aluminum block 3 pan units have 6 elements and 5 pan units have 3 elements See wiring diagrams 1 Turn cooking mode switch to constant 2 Measure voltage at heating element terminals on contactors and verify it against data plate voltage NOTE For 480V units element voltage is 277V A If voltage is incorrect find the source of the problem If voltage is correct check current draw amps through the heating element lead wires NOTE This method is preferred over a resistance check when a clamp on type amp meter is available 1 If current draw is correct then heati
22. ng element is functioning properly See table below for proper values 2 If current draw is not correct turn cooking mode switch to OFF and disconnect the electrical supply a Replace heating element assembly then proceed to step 3 funable to check current draw a resistance check may indicate a malfunctioning element 1 Turn the cooking mode switch to OFF and disconnect the electrical supply 2 Remove the lead wires from the heating element and check resistance ohms See table below for proper values Check for proper operation Values in the table are nominal Tolerance is 5 10 3 pan 208V units use three 2003W elements and three 664W elements 3 pan 208 240V units share the same element assembly block 240V units use only the three 2003W marked elements 2667W actual Resistance values TEMPERATURE CONTROL CALIBRATION To set the temperature control for optimum steamer operation the elevation above sea level for the service location must first be determined The steamer was preset at the factory to sea level The elevation is used in conjunction with the elevation table below to determine the correct set point temperature for the control NOTE If the set point temperature is too high the excess boiling action will cause water droplets to exit the steam vent pipe and cause high water usage F25386 0415 Page 16 of 27 Remove right side panel see COVERS AND PANELS Place
23. om heating elements 6 Steamer cycles on the temperature control until cook time expires 7 Time expires on cook timer A Timer contacts 11 13 open timer motor is de energized and timing stops B Timer contacts 11 amp 14 close 1 Buzzer energized thru K2 N O contacts and sounds NOTE The buzzer continues to sound until timer dial is set to off position or additional time is set C Timer contacts 21 amp 23 open cook light red goes out and temperature controller is de energized 8 cook timer off Timer contacts 11 amp 14 open buzzer is deenergized B Steamer reverts to hold temperature and continues to cycle until a cook time is dialed on timer power switch is turned to off or the door is opened NOTE If water level becomes low during cycling low water thermostat 2TAS will open and low water light 1LT amber will come on and buzzer will sound Timer and heating circuit will be de energized until water level is replenished and thermostat closes F25386 0415 Page 20 of 27 Constant Cooking Mode 1 3 Conditions A Steamer connected to correct voltage and is properly grounded B Power switch 1S off 1 Relay K3 energized K3 N C contacts open C High limit thermostat closed Hold thermostat closed E Low water thermostat closed Temperature control is setup properly and is ready to use F Door closed door switch closed Tim
24. oor Lubriplate 630AA for door handle sliding bracket F25386 0415 Page 4 of 27 C24EO SERIES ELECTRIC COUNTERTOP STEAMERS REMOVAL AND REPLACEMENT OF PARTS REMOVAL AND REPLACEMENT OF PARTS COVERS AND PANELS A WARNING Disconnect the electrical power to the machine and follow lockout tagout procedures SIDE PANELS 1 Remove screws from bottom of panel RIGHT SIDE PANEL SCREWS Fig 1 2 Slide panel down to clear top cover 3 Reverse procedure to install TOP COVER 1 Remove SIDE PANELS 2 Remove screws securing rear of top cover TOP COVER 3 Remove nuts securing front of top cover Page 5 of 27 FRONT OF TOP COVER REMOVE NUT 2 PLACES a 3 4 Lift top cover off machine 5 Reverse procedure to install REAR PANEL 1 Remove screws securing rear panel STEAM VENT ES 22364 Fig 4 2 Disconnect tube from steam vent pipe Remove rear panel gt Reverse procedure to install F25386 0415 C24EO SERIES ELECTRIC COUNTERTOP STEAMERS REMOVAL AND REPLACEMENT OF PARTS COMPONENT PANEL COMPONENTS A WARNING Disconnect the electrical power to the machine and follow lockout tagout procedures 1 Remove right side panel as outlined under COVERS AND PANELS 2 Disconnect lead wires to component being replaced TRANSFORMER RELAYS ah ie TERMINAL A K1 BLOCK Ae TEMPERATUREZ HIGH CONTROLLER 822370 F
25. ower depending on the supply available 3 0 gallons maximum holding pan capacity Steam Cooking The C24EO series steamer provides timed or continuous mode cooking in a pressure less compartment The small physical size of the steamer offers an efficient way to produce many foods in small batches Pressure less convection steam cooking will steam cook fresh foods or will steam defrost and cook frozen foods providing the maximum color flavor and nutritional value with the least expenditure of energy and labor The pressureless cooking compartment allows the operator to open and close the door anytime during a cooking cycle Model Designations e C24EO3 3 pan capacity C24E05 5 pan capacity NOTE based on 2 5 inch pan depth Exterior Dimensions e 24 24 w x 33 x 19 5 h e C24EO5 24 w x 33 x 26 h SPECIFICATIONS A potable water supply does not guarantee that it s suitable for steam generation The water supply must be within the following specifications or a local water treatment specialist may need to be consulted If a water treatment system is installed it must be properly maintained WATER REQUIREMENTS Page 3 of 27 Hardness Less than 3 grains 17 1ppm 1 grain of hardness e Silica Less than 13 ppm Total Chloride Less than 4 ppm e Phrange of 7 0 to 8 0 Un dissolved Solids less then 5 microns ELECTRIC AMPERAGE PER LINE MODEL 3 PHASE 1 PHASE 6 22
26. rder 11 Check door for fit and proper door gasket sealing F25386 0415 Page 14 of 27 C24EO SERIES ELECTRIC COUNTERTOP STEAMERS SERVICE PROCEDURES AND ADJUSTMENTS SERVICE PROCEDURES AND ADJUSTMENTS A WARNING Certain procedures in this section require electrical test or measurements while power is applied to the machine Exercise extreme caution at all times If test points are not easily accessible disconnect power and follow lockout tagout procedures attach test equipment and reapply power to the test DOOR LATCH ADJUSTMENT Opening a Jammed Door NOTICE Should the steamer door jam and cannot be opened DO NOT FORCE OR PRY the door as damage will occur 1 Lift up on bottom of door at the handle end to disengage latch A If door does not open remove right side panel see COVERS AND PANELS B Locate the striker that catches on door latch near steam chamber on front panel STRIKER 22384 Fig 35 C Remove nut from striker and this should release it from the panel Page 15 of 27 Fig 36 D Open door 2 Remove striker 3 Remove any burrs on striker that may cause latch to stick 4 Apply Loctite 271 to threads of striker 5 Reinstall striker with slotted side up Snug striker nut Perform Adjustment so door will not jam Adjustment 1 Reinstall striker with slot pointing upward and hand tighten nut only 2 Close door to center striker in front panel
27. rol as outlined under TEMPERATURE CONTROL CALIBRATION in SERVICE PROCEDURES AND ADJUSTMENTS HEATING ELEMENT ASSEMBLY Lay WARNING Disconnect the Sa S electrical power to the machine and S follow lockout tagout procedures Removal The heating element assembly contains elements molded into a cast aluminum block The block is mounted on the underside of cooking compartment Heating element assembly sits on springs which compress to hold assembly tight to bottom surface of steam chamber but allow for thermal expansion and contraction 1 Remove right SIDE PANEL 2 Remove screw and heat shield Page 8 of 27 C24EO SERIES ELECTRIC COUNTERTOP STEAMERS REMOVAL AND REPLACEMENT OF PARTS 5 Partially remove heating element assembly by pulling assembly towards you 6 Remove high limit thermostat bulb and bracket BRACKET _ ELEMENT ASSEMBLY i SCREW 22372 Fig 14 3 Remove bolts fu NOTE Support heating element assembly while BULB SCREWS removing last bolt Fig 17 7 Remove heating element assembly Installation NOTE When replacing element assembly for 3 pan unit with 240V supply disconnect and insulate element leads with orange green and red markers three 664W elements not used 1 Completely and evenly coat heating element assembly with thermal transfer compound using notched trowel Use one 13 5 oz tube of thermal transfer compound
28. s low on water Relay 3 Controlled by Power Switch 1S Keeps Buzzer from sounding and Low Water Light 1LT off when switch is in off position Power Switch 1S Rocker switch that turns steamer OFF and ON momentary on Switch also resets Low Water Light 1LT and Buzzer Door Switch 1SW Removes power from a portion of the steamer control circuit when door is opened High Limit Thermostat Protects steamer by removing control circuit power if the heating element assembly 1 5 temperature goes above 495 F Low Water Thermostat Monitors presence of water inside steamer 2 5 lt 24 Hold Thermostat Controls temperature of cavity for pre heat hold mode opens at 175 F Disables timer STAS 5 countdown if cavity temperature is too low Timer Motor Counts cook time of product when time is dialed Energizes buzzer and de energizes temperature controller when time expires Temperature Monitors temperature probe and cycles power to regulating contactor 2 CON for steam generation Temperature Probe Senses cooking compartment temperature at steam vent and sends a corresponding DC voltage back to the temperature control J type thermocouple Transformer 1T Steps down line voltage to 120 VAC control circuit voltage F25386 0415 m 18 of 27 C24EO SERIES ELECTRIC COUNTERTOP STEAMERS ELECTRICAL OPERATION COMPONENT LOCATION
29. tarting at the hinge side of door to separate the door halves NOTE The smaller radius of the step spacers fit into the slots of the outer door housing and is used to provide clearance for handle operation 4 Remove lock nuts and stepped spacers from threaded studs of door handle OUTER DOOR HOUSING STEP SPACERS INSTALLATION 1 Apply Lubriplate 630AA around slots of outer door housing where step spacers contact housing 2 Install door handle into outer door housing such that hinge side of door housing is to the left and arrow on handle is pointed upward 3 Install step spacer with smaller radius toward handle and door housing Smaller radius is a slip fit with outer door housing slot F25386 0415 C24EO SERIES ELECTRIC COUNTERTOP STEAMERS REMOVAL AND REPLACEMENT OF PARTS q STEP SPACER HIGH TEMP LUBRICANT Fig 26 4 Install lock nuts and tighten until no gap exists between handle step spacer and lock nut Do not over tighten lock nuts 5 Close inner door panel so that latch mechanism engages striker on front panel 6 Install outer door housing onto inner door panel Align the top and bottom screw holes of outer door housing with inner door panel OUTER DOOR a HOUSING Fig 27 8 Apply Loctite 7471 Primer and Loctite 242 to threads of screws before assembling 9 Install screws to secure door halves together 10 Check opening and closing operation of door DOOR LATCH A
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