EVOLUTION ELECTRIC SERVICE MANUAL
Contents
1. F E upside down and remove its legs Unbolt LAB aT unit from stand and then turn unit upside az Le Le down if applicable m 5 Remove the Bottom Cover by removing the Sheet Metal Screws holding it in place i F B Remove Drain Pan Rails if applicable Ku w 6 Remove insulation as needed to access the E Cast Heater Note the insulation 5 location ke i ca m to ensure proper fitting when re installed 7 Disconnect the wires to the Overtemp F D Switch note the wire color to its location m pin ag az W S 8 Unscrew the Overtemp Switch and remove e gt it from the bottom of the Cast Heater F A ki MO EL 9 Remove any insulation and thread lock at ES ES m material from the heater studs using a ae E a 8 e scouring pad SP8027 1203 Pg 22 CAST HEATER REMOVAL amp INSTALLATION If Heater Studs are Discovered Broken While Removing the Cast Heater OR If a Heater Stud Breaks Off While Removing or Installing the Cast Heater Call AccuTemp Service Dept 800 480 0415 CAST HEATER CON T 10 Using Fig G loosen all 24 nuts by starting with Nut 24 and working down to 1 11 Remove all 24 Locking Nuts F C Lock Washers F D amp Flat Washers F E from the Cast Heater Discard the used Locking Nuts keep and clean the Lock amp Flat Washers 12 Remove both Heater Mounting Brackets from the top of the heater by letting them hang by the wires over the electrical compartment F B 12. ZE emp WORLD S BEST EVOLUTION ELECTRIC SERVICE MANUAL ACCUTEMP PRODUCTS INC 8415 N CLINTON PARK DR e FORT WAYNE IN 46825 e 800 480 0415 e www accutemp net SP8027 1203 Email service accutemp net IMPORTANT FOR YOUR SAFETY The Safety Instructions listed on this page below should be posted in a prominent location as a reminder of safe practices as well as recommended actions to follow in the event of an equipment or facility s utility issue WARNING In the event of a Power Failure DO NOT attempt to operate this appliance WARNING DO NOT store or use Gasoline or any other Flammable Vapor and or Liguids in the vicinity of this or any other appliance WARNING IMPROPER installation adjustment alteration service or maintenance can cause personal injury or death and or property damage Read the installation operation and service maintenance instructions thoroughly before installing or servicing this eguipment WARNING Only OUALIFIED service technicians electricians should perform the eguipment installation to ensure that all electrical and safety reguirements are met and that all wiring is performed in accordance with all national state and local electrical codes SP8027 1203 i WARNING SYMBOL DEFINITIONS SYMBOL DEFINITIONS Symbols are used to attract your attention to possible dangers They are only effective 1f the operator uses proper accident prevention measures Some of the symbols are b
3. SEE Plugged In A Error Code E J YES NO SEE Low Water YES SEE Steam Out YES SEE B Light F The Door K NO Check MD ee Food Over YES SEE Internal Light G Cooked L Power Voltages NO SEE C High Water Over Fill Light Food YES SEE Under M Cooked Component SEE YES Voltages D Correct Float Ball YES SEE Ball __ Installed H YES Different NO Problem NO With WITH Steamer HART Float Ball YES SEE Operations S Present Ball DONE Service Service Service 800 480 0415 or service accutemp net Service SP8027 1203 Po 9 FLOW DIAGRAM REFERENCE TROUBLESHOOTING CHART REF LETTER POSSIBLE CAUSE EVALUATION PawerCord Dis bnr t d Confirm proper voltage 1s present at receptacle Plug in Power Cord Unplug steamer and check line voltage at plug in Breaker Is Tripped receptacle Reset Breaker Check for proper incoming line voltage to the primary side and 24VAC on the secondary side Over Temn Switch Check between the violet wire terminal J3 on the Water ME a Contrl Board and the brown wire after the fuse Check for 24VAC incoming power at pins J2 1 amp J2 2 Check for output at pins J7 3 amp J7 4 On Off 24VAC Check the wiring to the component including wire to Bad Component or Faulty Wiring connectors GND s and damage Control panel not responding If a component output is bad then it may need replaced Check for 1000 ohms at room temp on Control Kepad Error C
4. S A e ll lu geff Sai H m U 5 TF wens E On s E TO On m oL WW e ante A GE CCC Fe i K cb SS rien T Drawing Ho iw SCHEMATIC STEAMER ATIT 3595 G ATMOSPHERIC SP8027 1203 Pe 30 ELECTRIC EVOLUTION WIRING SCHEMATIC 208 240V 3 a 7 Y Va E LE E L a AT1T 3595 2 SE CA ms 3 PHASE 208 240V W l ATMOSPHERIC r DIGITAL STEAMER i CONTROLLER SCHEMATIC STEAMER ATMOSPHERIC ae G 7 I Pe 31 SP8027 1203 ELECTRIC EVOLUTION WIRING SCHEMATIC 208V 3Q 17K W YI MOHO TUDO ba ST FS SI KA p d MERLENE HHJH AECH Le MALL GL AB Z 2S wHd PRE LL 7 ena E GW ll i o raring Me ra agi ATIT 3595 CHEN SP8027 1203 m Pg 32 ELECTRIC EVOLUTION WIRING SCHEMATIC 440 480V 30 ATIT 3505 4 3 PHASE 440 480 ATMOSFHERIC STEAMER Pg 33 ATMOSPHERIC SCHEMATIC STEAMER rr T la G AT1T 3595 Je Fo i SP8027 1203
5. Side Panel by removing the Sheet Metal Screws holding it in place 3 Disconnect the wires note the wire color to its location terminal 4 Remove the 2 mounting nuts and then remove the Contactor 5 Re install in reverse order SP8027 1203 Pg 14 ELECTRICAL COMPONENTS REMOVAL amp INSTALLATION TRANSFORMER 1 Unplug the Unit 2 Remove the Left Side Panel by removing the Sheet Metal Screws holding it in place 3 Disconnect the wires note the wire color to its location terminal 4 Remove the 2 mounting nuts and then remove the Transformer 5 Re install in reverse order WATER SENSOR CONTROL BOARD 1 Unplug the Unit 2 Remove the Left Side Panel by removing the Sheet Metal Screws holding it in place 3 Disconnect the wires note the wire color to its location terminal 4 Carefully push in the locking leg on the 4 plastic posts while pulling the Water Board up off the posts note the board s orientation 5 Remove the Water Board 6 Re install in reverse order CONTROL RELAY 1 1 Unplug the Unit 2 Remove the Left Side Panel by removing the Sheet Metal Screws holding it in place 3 Disconnect the wires note the wire color to its location terminal 4 Remove the 2 mounting screws and then remove Control Relay 1 5 Re install in reverse order SP8027 1203 Pg 15 ELECTRICAL COMPONENTS REMOVAL amp INSTALLATION WATER SENSORS 1 Unplug the Unit 2 Remove the Left Side P
6. flashing continuously PWR Button Pushed amp Water Level Is Below the Low Water Level Sensor MANUAL FILL e The Low Water Light Indicator will be ON and Alarm will sound e PRE is displayed on the Control Keypad Board Thered LED light on the Water Sensor Board will be flashing continuously PWR Button Pushed amp Low Water Level Sensor Is Satisfied MANUAL amp AUTO FILL e The Low Water Light Indicator and Alarm only manual fill units use an alarm for low water condition will be OFF e This Is minimum water level needed for the Contactor to close and turn the Cast Heater ON e The red LED light on the Water Sensor Board will have about a 1 second flash delay Water Level Is At the High Limit Water Level Sensor AUTO FILL e When the water level in the chamber touches the High Water Limit Probe the Water Sensor Board will continue to activate the Auto F1ll Valve for an additional 30 seconds and then turns the valve off This will occur every time the water level falls below the High Limit Probe e The red LED light on the Water Sensor Board will have about a 2 second flash delay Water Level Is Filled Too High in the Steam Chamber AUTO FILL e The Float Ball rises on the Over Fill Reed Switch sensor peg until the magnetic field from the Float Ball is above the Reed Switch causing the Reed Switch to open This causes the Control Relay 1 AC coil s voltage to drop dis engaging the relay from the steamer s normal o
7. light is not lit Check that steamer is in the COOK mode and NOT in the HOLD mode Steam Vent Blocked See Ref Letter I SP8027 1203 Pg 11 Cast Heater Steam Temperature Is Not At Desired Cook Temperature FLOW DIAGRAM REFERENCE TROUBLESHOOTING CHART REF LETTER POSSIBLE CAUSE EVALUATION Check to see if the Door is seating completely around Do Atsenibiy the face of the Steamer Check that the Door Gasket does not have any cuts nicks debris or discolorations white or grey Check that the Chamber Pressure Switch opens and closes checking the Ohms reading while blowing into its input hose Disconnect the hose from the chamber inlet hole Steam Vent Blocked See Ref Letter I Ensure that the proper Cook Time 1s being used L Food Cook Time Too Long Refer to the Owners Manual for cooking tips if no Pressure Switch mechanical reason is found for this symptom See Ref Letter K Ensure that the steamer 1s in the COOK mode and not the HOLD mode HOLD nas a preset temp value that is below that of 212 F Check that proper pan placement is being utilized for best cooking conditions See Owners Manual Ensure that the Drain Ball Valve 1s shut tightly or possible loss of heating efficiency Refer to the Owners Manual for cooking tips if no mechanical reason is found for this symptom Food Cook Time Not Long Enough If your symptoms are not listed in the Flow Chart and or the REF Chart then additional tr
8. on the door n N E xr E hinge side of the Bottom Hinge amp remove the T very top screw on the door side hinge of the Top Hinge 4 Pull the door handle and open the door 5 Lift and pull out the Inner Door Panel 6 Remove the 3 mounting nuts and screws holding the Door Handle Latch to the side of the door and the Inner Door Holding Tab 7 Remove the Door Handle Latch Assembly 8 Re install in reverse order Ensure Anti sieze is re applied to all hinge screws DOOR HINGE Ensure That the Inner Door is Reinstalled with its Middle Brace Bar Behind the 1 Unplug the unit amp shut the Door Door Laich TaD FT 2 Remove the Hinge Covers Fig J Also Ensure That the Screw Retainer 3 Remove the 3 hinge screws going into the face Openings are Lined Up with the Door s of the steamer of the Bottom Hinge Hinge Side Fig M 4 While supporting the Door on the hinge side remove the 3 hinge screws into the face of the steamer of the Top Hinge 5 Pull the door handle and remove the Door 6 Remove the very bottom screw on the door hinge side of the Bottom Hinge amp remove the very top screw on the door side hinge of the Top Hinge 7 Lift and pull out the Inner Door Panel 8 Remove the remaining door side screws for the hinge or hinges to be replaced Note the orientation of the Hinge Spacer Bars as they relate to the Hinge orientation 9 Remove the Door Hinge or Hinges 10 Re install in reverse order Ensure A
9. 3 Remove the Cast Heater F F Might have to lift heater by its heater wires or use a flat head screwdriver to pry up the Cast Heater from the Thermal Compound 14 Re install in reverse order SEE NEXT PAGE FOR INSTALLATION NOTES Front Heater Side Wires Of Should The Be On Steamer Terminal Block Side Fig G Only using a brass or stainless steel brush scrape remove and clean off any remaining Thread Sealant and Thermal Compound residue from the bottom of the steamer even around the studs SP8027 1203 Pg 23 CAST HEATER INSTALLATION NOTES amp CAUTIONS CAST HEATER S SHINY SIDE FACES THE BOTTOM OF THE STEAMER Using a Paint Brush Apply Thermal Paste to the Shiny Side of the Cast Heater Bellevelle Washers should look like mini volcanos when placed on heater stud The HEX Locking Nut Needs to be Torgued Between 23 27 IN LBS Tighten Starting with Nut 1 and Follow the Numbered Layout Pattern to Nut 24 Tighten Twice in This Pattern t Notch Cut Out Goes Towards the Front Side po ld Gyd vu the yr 114 ur L L Steamer CAUTION DO NOT OVER TOROUE THE LOCKING NUTS Over Torguing The Zinc Nuts Can Cause the Studs to Break Off This Will Cause Heating Issues and the Steamer Will Not Operate Correctly or Safely SP8027 1203 Pg 24 AUTO FILL VALVE l 2 Unplug the Unit amp drain any remaining water from the steam chamber Close the supply water valve and disconnect the Supp
10. Brood ats on bobo rrr a ooo io o atak k ooo o ooo ot 25 High Water Overfill Reed Switch 2 PERSONS REQUIRED 25 Float Ball Ee e EEN 26 Dra Bala E 26 BY w ja M zil PU FEN PE Dr Ii 26 Door Components Removal amp Installation 27 29 b can E 27 DOG PA a sensib S 21 Door Handle Latch Asset 28 Dorado tonces 28 DO CAS EE 29 SCHEMATIC amp CHARTS Electrical Schematic AT1T 3595 Rev G 208 240V It 30 Electrical Schematic AT1T 3595 Rev G 208 240V 20 31 Electrical Schematic AT1T 3595 Rev G 208 240V 30 17KW issus 32 Electrical Schematic AT1T 3595 Rev G 440 480V 3D Le 2220eeeeoooeeoooseoosoeeooooeooonesosooeoooooennnseooeoeeonoouonosesoeeeee 33 SP8027 1203 vi Current Revision 1203 Date 3 31 12 Change Initial Release SP8027 1203 REVISION SHEET Prior Revision Date N A N A Pg 1 TROUBLESHOOTING NOTES TROUBLESHOOTING NOTES If the steamer is not reaching temperature e Ensure that the steamer is not in the HOLD Mode verses the COOK Mode The default mode for the steamer when the PWR button is turned ON is COOK So if the operator presses the Timer Button then the Cook Hold button the operator has just placed the steamer in the HOLD Mode and the steamer will not reach 212 F COOK Mode Ensure that the steam vent located on the back of the steamer is not blocked or clogged If the customer has added an extended exhaust pipe this could increase the chances of vent blockag
11. HISTORY See V VI REVISION US EE l NOTES Troubles hoon Nols goat vo be tik fo l a nal e a kn ae id io kk a n eren 2 OPERATIONAL amp COMPONENT INFORMATION Purpose Reterence of Main Component Cad tete einen te 3 5 Additional Component eent 5 SCCM SMCS Ok OMSL AiO EE 6 7 M dilyine ControlKeypad ME ue 8 TROUBLESHOOTING A FOUBIE SAOOUNE FOW DI VOT a HRN kata e a WN a ke a CN I RH a nan FFF a ka a HN a e ai ai at ia 9 Flow Diagram Reference Troubleshooting Chart 10 12 COMPONENT REMOVAL amp INSTALLATION Location of Electrical Components Picture Overview 13 Electrical Components Removal amp Installanon 000000000 LL LLDD YNN nano nen n nn 14 19 Cotos PUP STAB E 14 USS sine dt ans eege 14 Re 14 Ke met EE 15 Water Sensor Control BOM daa 15 Control Relay NEE 15 VALO MM OT O e oa bat kan pa pants e gg 16 Control Keypad Board EE 16 IB Ta a E EE 17 Chamber Pressure SWG PI ler ak a aia 18 POU KONE EE 18 Temperature RED POD 19 Overtemp Switch ThermalLimit SW3 eee 2 PERSONS REQUIRED 19 SP8027 1203 V TABLE OE CONTENTS COMPONENT REMOVAL amp INSTALLATION CON T Location ot Cast Heater e EE 20 Cast Healer Replacement K LR sual T 21 Cast Heater Removal amp Installatnon ceeeeeeeeeceeeeeeees 2 PERSONS REQUIRED 22 24 Cast Heater Installation Notes e CAU RS a 24 Miscellaneous Components Removal amp Installaton 00000 eee Y k k ke KA 25 26 AMOFIN VE bd kte ek a oo A ron kk
12. HOLD temperature s preset value The Control Keypad Board will regulate temperature via the RTD input based on the current HOLD mode preset value This value can be changed using the program function on the Control Keyboard Control SP8027 1203 Po 7 MODIFYING CONTROL KEYPAD PROGRAM SETTINGS Hrs Min Sec LED Lights UP Arrow S1 S3 COOK HOLD DOWN Arrow S4 S6 TEMP Display POWER S5 S2 TIMER SI Increase Program Item Will cycle the Hrs Min Sec LED light S4 Decrease Program Item Will cycle the Hrs Min Sec LED light S3 Increase Program Value Will change the Digital Readout display S6 Decrease Program Value Will change the Digital Readout display S2 Exit Save ENTERING PROGRAM MODE Simultaneously depress and hold S4 amp S6 for minimum of 8 seconds or until the Hrs LED blinks and the display shows a Hold Temp number default is 1809F Now the Controller can operate under the Program Function Parameters Program Mode Function Parameter Table Hrs LED Min LED Sec LED PARAMETER MIN ELECTRIC MIN Temp MAX Temp 180 See LED i FF 180 FF T ON FF ON TEMP Probe Offset Degree ON ON TEMP Probe Offset Neg Pos Dif NEGT ON i ON FF FF FF ON ON N TO RESET CONTROLLER TO FACTORY DEFAULT VALUES PRESS AND HOLD S4 THEN PRESS S5 SP8027 1203 Pg 8 TROUBLESHOOTING FLOW DIAGRAM START YES NO NO SEE POWER I ON NO YES Steamer NO SEE Control Panel YES SEE YES
13. LLATION FI Pg 25 FLOAT BALL MAGNETIC l Za Open the steamer Door and remove the left side pan rail Lift and remove the steam collection cover plate Remove the Float Ball off of the High Water Reed Switch Sensor Post Re install in reverse order Ensure Sensor Post amp Float Ball hole are clean before re installing DRAIN VALVE l 2 ON Unplug the Unit amp drain any remaining water from the steam chamber Turn the unit upside down and remove its legs Unbolt from stand and then turn unit upside down if applicable Remove Bottom Cover by removing the Sheet Metal Screws holding it in place Remove Drain Pan Rails if applicable Remove the Drain Handle Cover Plate and the insulation surrounding the Drain Valve Remove the Drain Pipe from the Drain Valve Remove the Drain Valve Re install in reverse order Ensure Sealant is re applied to all pipe threading DRIP PAN l Unplug the Unit 2 Remove the 4 Sheet Metal Screws at the bottom of the Front Panel Slide the Drip Pan s out from between the Front Panel and the Bottom Panel Ensure the split Drip Pans are sloped towards the center of the steamer Re install in reverse order SP8027 1203 Drain Cover MISCELLANEOUS COMPONENTS REMOVAL amp INSTALLATION Split Drip Pan Pg 26 DOOR COMPONENTS REMOVAL amp INSTALLATION DOOR ASSEMBLY m Unplug the unit
14. Overtemp Switch AT1E 2653 3 Thermal Limit SW3 14KW amp Up AT1E 2653 4 provides actions for the desired water level needs Teflon exterior with a stainless steel center that uses the minerals Water Sensor AT1E 2652 1 in the water to complete the electrical circuit to the Water Control Probe Board MUST BE CLEAN TO WORK PROPERLY Once the Low Water Sensor 1s satisfied it will allow the Solid State Relay s to activate If the water level is below the sensor the Water Board will activate the Auto Fill Valve if installed filling the unit the water until the High Limit Water Sensor 1s satisfied Low Water Level Probe On initial chamber water fill once the water level reaches and satisfies the Operational Water Sensor the Water Board will keep the Auto Fill Valve open for 30 additional seconds High Limit After initial chamber water fill when the water level drops below the Water Level sensor s operational level the Water Board will open the Auto Fill Probe Valve for 30 seconds to raise the water level back above the High Limit Water Sensor This process will repeat as long as the water level stays above the Low Water Sensor SP8027 1203 Pg 3 PURPOSE REFERENCE OF MAIN COMPONENTS Solenoid Valve that allows water to flow into the steam chamber that AT1A 3841 1 is controlled automatically by the Water Board based on inputs from the Water Sensor Probes Auto Fill Valve OPTIONAL Reed Switch Magnetic Reed S
15. Satisfied The red LED light on the Water Sensor Board will have about a I second flash rate The Water Sensor Control Board s K2 Relay will close sending power to the Contactor s coil closing the contacts and allowing Line Voltage to be sent to the normally open Solid State Relay s The Control Keypad Board will send a 24VAC signal to the Solid State Relay s closing the Relay s as long as the Door Switch and the Chamber Pressure Switch are closed The Solid State Relay s then pass Line Voltage to the Cast Heater s Elements generating heat evenly over the bottom of the steam chamber creating steam for cooking Temperature Sensor RTD and Control Keypad Board As the water temperature rises the RTD will provide a signal based on the resistance of the sensor to the Control Keypad Board to provide a digital temperature display Control Panel will show PRE Preheat on initial start up until the steam chamber reaches 1959F then COO Cook will be displayed between 1959F and 212 F The operating default mode on initial PWR ON 1s COOK mode which automatically causes the steamer to go to the normal operating boiling point which is 2129F at sea level In COOK mode the 24VAC output from the Control Keypad Board 1s continuously on so that the unit s temperature 1s controlled by the Chamber Pressure Switch which opens at 1 2 inches of water column or higher In HOLD mode HLD the steamer s regulated temperature will change to the
16. and shut the Door 2 Remove the Hinge Covers Fig J 3 Remove the 3 hinge screws going into the face of the steamer of the Bottom Hinge Fig K 4 While supporting the Door on the hinge side remove the 3 hinge screws into the face of the steamer of the Top Hinge 5 Pull the door handle and remove the Door 6 Re install in reverse order Ensure Anti sieze is re applied to all hinge screws If the Door Handle Latch Is Moved to the Opposite Side Ensure That the Door Switch Is Moved to the Corresponding Door Handle Latch Side Face Screws STEAMER WILL NOT OPERATE IF NOT DONE INNER DOOR PANEL ES E S Inner Door 1 Unplug the unit and shut the Door 2 Remove the Hinge Covers Fig J 3 Remove the very bottom screw on the door hinge side of the Bottom Hinge 4 Remove the very top screw on the door hinge side of the Top Hinge 5 Pull the door handle and open the door 6 Lift and pull out the Inner Door Panel 7 Re install in reverse order Ensure Anti sieze is re applied to all hinge screws Ensure That the Inner Door is Reinstalled with its Middle Brace Bar Behind the Door Latch Tab Fig L Also Ensure That the Screw Retainer Openings are Lined Up with the Door s Hinge Side Fig M SP8027 1203 Pg 27 DOOR COMPONENTS REMOVAL amp INSTALLATION DOOR HANDLE LATCH ASSEMBLY 1 Unplug the unit amp shut the Door bw J m 2 Remove the Hinge Covers Fig J AQ gt 3 Remove the very bottom screw
17. anel by removing the Sheet Metal Screws holding it in place 3 Open the door and ensure that all the water 1s drained from the steam chamber 4 Disconnect the wire from the backside of the Water Sensor access via left side panel 5 Remove the retaining nut that mounts the Water Sensor to the Steam Chamber 6 Push the Water Sensor through the hole in the steam chamber from the backside 7 Re install in reverse order Torgue Sensor Nuts to between 12 15 In Lbs CONTROL KEYPAD BOARD 1 Unplug the Unit 2 Remove the Left Side Panel by removing the Sheet Metal Screws holding it in place 3 Disconnect the wires note the wire color to its location terminal 4 Remove the 7 mounting nuts and then remove the Control Panel CCA 5 Uf accessing the Program Mode is needed go to page 8 for more details 6 Re install in reverse order SP8027 1203 Pg 16 ELECTRICAL COMPONENTS REMOVAL amp INSTALLATION DOOR SWITCH Door Latch on the Left Hand Side 1 Unplug the Unit 2 Remove the Left Side Panel by removing the Sheet Metal Screws holding it in place 3 Disconnect the probe wires Control Keypad Panel J7 Pin 1 the White Brown wire from the Chamber Pressure Switch the wires to the location pins are enter changeable 4 Push back the insulation so you can access the other mounting nut to be removed 5 Remove the 2 mounting nuts and then remove the Door Switch Fg I 6 Re install i
18. e if the exhaust pipe is not installed properly The exhaust pipe should be made of copper galvanized or stainless steel The exhaust pipe should have a diameter of 3 4 and be sloped 1 4 for every 12 of length recommend a height no greater than 24 Also the addition of extra fittings that can alter the gravitational flow of the steam condensation can cause blockage If vent blockage does occur it will cause the chamber pressure switch to stay open which prevents the heater from turning back on and the temperature will continue to drop Blocked vent can additionally cause steam to blow out of the door Auto Fill Steamer If the steamer is overfilling with water and causing the steamer to shut off e Ensure the steamer is level front to back and side to side An un level steamer can cause the water in the steam chamber to collect in the front of the steamer causing the Over Fill Float Ball to raise and trip the Reed Switch prematurely every time the steamer is turned ON Once the Reed Switch trips it will cause an Over Fill Light and Buzzer while turning off the steamer and preventing its usage e Ensure that both of the Water Sensors are clean Build up of scale or crud will prevent the Water Sensors from providing the appropriate control signals to the Auto Fill Valve causing it to overfill with water e Ensure that the water pressure being supplied to the Auto Fill Valve should not be greater than 60 psi If water pressur
19. e is to high then a larger volume of water will be added to the steam chamber during the auto fill cycle causing the steamer to overfill with water SP8027 1203 Po 2 PURPOSE REFERENCE OF MAIN COMPONENTS e Provides line voltage to the Solid State Relay s when the contactor s Contactor ATOE 1587 4 coil 1s closed by the control signal sent from the Water Control Board 3 Pole e Provides line voltage to the Transformer ATOE 2662 5 Steps down the Supply Line Voltage to 24 28VAC Normally closed switch that provides a safety feature to the machine in case the Cast Heater overheats If the Cast Heater overheats the switch will open and turn the steamer off while lighting the red LED Overtemp Light on the Control Panel The steamer will not turn on until the temperature has dropped enough to allow the Overtemp Switch to close again Human interface for steamer operations through push buttons operations amp display readouts Control Keypad AT0E 3625 1 Provides power to the Solid State Relay s 24VDC Board Receives input from the Temperature RTD Sensor and displays the water temperature on the LED readout Maintains the preset HOLD temperature Receives inputs from Water Sensor Probes and 1mplements corresponding actions for those inputs based on the water level in the Water Sensor Control Board ATOE 3230 2 steam chamber Controls the Auto Fill Valve if installed and receives inputs that 12KW amp Lower
20. e steam Never reach into the cooking chamber or handle hot items without wearing the proper heat protective gloves Steam coming out of the holes on the right side of the cooking chamber is invisible and can cause severe burns Water inside the steam chamber creating steam has a temperature of 212 F and will cause burns if touched or spilled on the skin PERSONNEL INJURY HAZARD WHILE PICKING UP OR MOVING HEAVY EOUIPMENT Always use 2 people and proper lifting technigues when picking up moving or flipping over heavy eguipment SLIP amp FALL HAZARD WHILE WORKING ON WATER HOLDING EOUIPMENT Keep the floor in front of the eguipment clean and dry If spills occur clean them up immediately to avoid potential injuries SP8027 1203 iii WARNING amp CAUTION NOTES WARNING ONLY OUALIFIED SERVICE TECHNICIANS SHOULD PERFORM MAINTENANCE ON THIS EOUIPMENT CAUTION e DO NOT use abrasive materials such as wire brushes or metal scouring pads to clean the Water Sensors e DO NOT use Aluminum Oxide Sandpaper to clean the Water Sensors It leaves a residue that will not allow Water Sensors to work properly e DO NOT manually fill water above the Water Level Mark on the left side of steam chamber above the High Limit Level Sensor SP8027 1203 iv TABLE OE CONTENTS SAFETY Tmpor i an FOT KOURI VEY EE 1 Warun ymbol MVS ai On L P y ibe l n O P P O P O O pe 11 Daley EE 111 Waring eC auon NOC iia IN T O C MANUAL
21. e steamer while removing the 2 mounting bolts holding the SSR Assy to the inside back of the component chamber and then remove the desired Solid State Relay 5 Re install in reverse order SP8027 1203 Pg 18 ELECTRICAL COMPONENTS REMOVAL amp INSTALLATION TEMPERATURE RTD SENSOR 1 Unplug the Unit 2 Remove the Left Side Right Side and Top Panel by removing the Sheet Metal Screws holding it in place 3 Disconnect the probe wires from the Control Keypad Panel and pull them from the left over the top to the steamer s right side the wires to the location pins are enter changeable 4 Remove the mounting nut and then remove the Temperature RTD Sensor 5 Re install in reverse order Ensure Thermal Paste is applied to the Temperature RTD Sensor OVERTEMP SWITCH THERM LIMIT SW3 1 Unplug the unit 2 Using an additional person turn the unit upside down and remove its legs Unbolt unit from stand and then turn unit upside down if applicable 3 Remove Left Side Panel amp Bottom CoverPanel by removing the Sheet Metal Screws holding it in place Remove Drain Pan Rails if applicable 4 Remove the Insulation as needed to provide access to remove the Overtemp Switch from the bottom of the Cast Heater Note the insulation location for proper fitting when re installed 5 Disconnect the wires to the Overtemp Switch note the wire color to the location pin 6 Unscrew the Overtemp Switch and remove
22. ection terminals for good crimps Switch is normally closed Chamber Pressure Switch Check the Chamber Pressure Switch for continuity Ensure Chamber Pressure Switch 1s not stuck open Steam should be coming out of vent at back of steamer Check for blockage in the vent which can cause the Chamber Pressure Switch to open Ensure that there 1s at least a minimum of 1 4 slope for every foot added of extended exhaust piping Steam Vent Blocked Ensure that any extended exhaust piping is made of galvanized or stainless steel or copper and a minimum of 3 4 in diameter I If blockage 1s present try to pour some hot water down the vent piping to unclog the blockage may have to blow out the blockage if water doesn t help Check for 24 30 VAC on pins Al A2 of each Solid State Relay Green LED should be lit Ensure that Relay Contacts are closing when receiving the 24 30 VAC from the Control Keypad Board Check that proper line voltage 1s being passed through the Solid State Relay to the Heating Elements Solid State Relay s Check that the correct Amps based on KiloWatts of unit are being drawn from each Element Ensure that all the required voltages based on required phase needs of the unit are present to each Element Contacti Check that the Contactor is not open preventing the line voltage to the Solid State Relay s Check that the Door is closed and no steam is escaping from it Verify that Low Water indicator
23. he internal elements to boil the 10 KW water to create steam Cast Heater ATIA 3530 3 Cast Heater can be wired to single or 3 phase and have a parallel Replacement Kit 12 KW delta or wye configuration AT1A 3530 4 Cast Heater must be replaced with the same wattage heater as specified in the model number 14 KW ATIA 3530 6 17 KW AT1A 3530 7 SP8027 1203 Po 4 PURPOSE REFERENCE OF MAIN COMPONENTS e Provides temperature input to Control Keypad Board which displays the temperature in the steam chamber based on resistance changes from the Temperature RTD Sensor e Used to maintain the preset HOLD mode temperature e Keeps the steam trapped inside the steam chamber to allow pressure A ri to build and cycle the Chamber Pressure Switch ATIP 2239 1 SE Open Close valve used to drain water from the steam ADDITIONAL COMPONENT PART NUMBERS Inner Door Assembly AT1A 3647 1 Temperature RTD ATOE 3626 1 Sensor SP8027 1203 Pg 5 SEOUENCE OF OPERATION INDICATORS AND WATER CONTROL BOARD OPERATION Manual amp Auto Fill PWR Button Pushed amp Water Level Is Below the Low Water Level Sensor AUTO FILL e The Low Water Light Indicator will be lit e PRE is displayed on the Control Keypad Board The Water Sensor Board sends a signal to the Water Sensor Board s K1 Relay to open the Auto Fill Valve and start filling the steam chamber with water The red LED light on the Water Sensor Board will be
24. it from the bottom of the Cast Heater 7 Re install in reverse order Ensure Thermal Paste is applied to the Overtemp Switch and its threading SP8027 1203 Pg 19 LOCATION OF CAST HEATER Cast Heater SP8027 1203 Pg 20 CAST HEATER REMOVAL amp INSTALLATION The 1 4 20 Nut Special Locking Nut Can Only Be Used Once Ensure That A New Cast Heater Replacement Kit Is Ordered and Received Prior to Removing or Installing the Cast Heater Part AT1A 3530 X See Page 4 Order the Cast Heater Replacement Kit for the Correct Heater Wattage Required SP8027 1203 Pg 21 CAST HEATER REMOVAL amp INSTALLATION REMEMBER AN ADDITIONAL PERSON IS REQUIRED WHEN CONDUCTING MAINTENANCE INVOLVING TURNING THE UNIT OVER IF HEATER WIRES HAVE NON BRAIDED INSULATION THE HEATER IS NOT A CAST HEATER CONTACT ACCUTEMP SERVICE AT 800 480 0415 USE THE INCLUDED CAST HEATER REPLACEMENT KIT INSTRUCTION BOOKLET IN CONJUNCTION WITH THE REMOVAL amp INSTALLATION PROCEDURES IN THIS MANUAL CAST HEATER Hs 1 Unplug the unit and drain all the water out ym RE A gt of the steamer LT 141 DT 2 Remove Left Side by removing the Sheet e be B L AA Metal Screws holding it in place ai YO 3 Disconnect the 6 braided insulation Heater Wires from their Terminal Board e Connections Note the heater wires lt r numbers to their location terminals 5 4 Using an additional person turn the unit F A
25. ly Water Hose coming into the steamer Remove the Left Side Panel by removing the Sheet Metal Screws holding it in place Disconnect the wires from the Auto Fill Valve note the wire color to its location pin Disconnect the Auto Fill Valve Hose Fitting F H On the back of the steamer remove the 4 mounting screws securing the Auto Fill Valve bracket on the inside of the steamer Remove the Auto Fill Valve Re install in reverse order Ensure Sealant is re applied to all pipe threading OVER FILL REED SWITCH l Unplug Unit close the supply water valve 2 Disconnect the garden hose from the back of the 9 steamer amp drain any remaining water from the steam chamber Remove the Left Side Panel by removing the Sheet Metal Screws holding it in place Disconnect the REED Switch wires note the wire color to its location pin Turn the unit upside down and remove its legs Unbolt from stand and then turn unit upside down if applicable Remove Bottom Cover by removing the Sheet Metal Screws holding it in place Remove Drain Pan Rails if applicable Remove the front insulation pieces that are laying on top of the Over Fill Reed Switch Wire is ran in between the insulation pieces Remove the retaining nut and lock washer holding the Reed Switch inside the Sensor Post Remove the High Water Reed Switch F I 10 Re install in reverse order SP8027 1203 MISCELLANEOUS COMPONENTS REMOVAL amp INSTA
26. n reverse order Door Latch on the Right Hand Side 1 Unplug the Unit 2 Remove the Left Side Right Side and Top Panel by removing the Sheet Metal Screws holding it in place 3 Disconnect the probe wires Control Keypad Panel J7 Pin 1 the White Brown wire from the Chamber Pressure Switch and pull the wires up over the top of the steamer the wires to the location pins are enter changeable 4 Remove the insulation on the right side to access the Door Switch to be removed Fg 2 5 Remove the 2 mounting nuts and then remove the Door Switch Fg 3 6 Re install in reverse order SP8027 1203 Pg 17 ELECTRICAL COMPONENTS REMOVAL amp INSTALLATION CHAMBER PRESSURE SWITCH 1 Unplug the Unit remove the Left Side Panel by removing the Sheet Metal Screws holding it in place 2 Disconnect the Wiring Terminals from the Chamber Pressure Switch note the wire color to its location terminal 3 Remove the hose clamp and disconnect the hose from the Chamber Pressure Switch 4 Remove the 2 mounting nuts holding the Chamber Pressure Switch to chamber cavity 5 Remove the Chamber Pressure Switch 6 Re install in reverse order SOLID STATE RELAY SSR 1 Unplug the Unit 2 Remove the Left Side Panel by removing the Sheet Metal Screws holding it in place 3 Disconnect the wires for the desired SSR being replaced note the wire color to its location terminal 4 Remove the thread cover nuts on the back of th
27. nti sieze is re applied to all hince screws SP8027 1203 Pg 28 DOOR COMPONENTS REMOVAL amp INSTALLATION DOOR GASKET 1 Unplug the unit amp shut the Door 2 Remove the Hinge Covers Fig J 3 Remove the very bottom screw on the door hinge side of the Bottom Hinge amp remove the very top screw on the door side hinge of the Top Hinge 4 Pull the door handle and open the door 5 Lift and pull out the Inner Door Panel 6 Remove the 6 Gasket retaining brackets by removing the 12 nyloc mounting nuts holding them in place 7 Remove the Door Gasket 8 Re install in reverse order Ensure Anti sieze is re applied to all hinge screws INSTALLATION NOTE Make sure the new Door Gasket is untangled e Starting at one corner stretch the Gasket to the opposite corner e Repeat this sequence until all 4 corners are seated e Push the Gasket down all the way around to ensure the Gasket seats firmly on the inner door Ensure That the Inner Door is Reinstalled with its Middle Brace Bar Behind the Door Latch Tab F lg L Also Ensure That the Screw Retainer Openings are Lined Up with the Door s Hinge Side Fig M SP8027 1203 M em p A O i Gasket Retaining Brackets Gasket Gasket Retaining Bracket Pg 29 ELECTRIC EVOLUTION WIRING SCHEMATIC 208 240V 1 IN e M ss HO EE CE ffi D
28. ode 1F or 99F for Board on J3 Pins 1 amp 2 Temperature RTD Probe EC 1F Open Temp RTD sensor EC 99F Shorted Temp RTD sensor Ensure water level is above Low Water Sensor Probe inside the steam chamber Ensure that the Low Water Sensor 1s cleaned and that the Water Board is working properly Low Water Sensor Not Satisfied Check that the water level inside steam chamber 1s not empty and refill if needed Steamer Has Over Heated If an Auto Fill unit then ensure that water supply is not shut off or Auto Fill Valve is faulty Ensure Water Sensors are clean A C E F G Ensure Float Ball 1s not stuck on the Sensor Post Ensure Sensor Post amp inside of the Float ball are clean Check continuity of the Reed Switch Float over sensor creates continuity the Float off the sensor is open Float Ball amp Reed Sensor Faulty DO NOT OPEN DOOR Open Drain Valve until the High Water Light goes off EE 0 E If light DOES NOT go out and no water in steamer then possibly a sensor fault Ensure the top Water Sensor 1s clean H EE EECH Check that Water Board 1s working properly SP8027 1203 Ps 10 FLOW DIAGRAM REFERENCE TROUBLESHOOTING CHART REF LETTER POSSIBLE CAUSE EVALUATION Control Keypad Panel Check for 24 30VAC output J7 Pins I amp 2 Ensure Door is shut and handle is latched Check the Door Switch for continuity with Door Door Switch Not Engaging closed Check the butt splices and wire conn
29. oubleshooting may be reguired If you need additional ideas for troubleshooting or want to confirm your symptoms with one of our Service Techs please contact us by phone or e mail listed below with the unit s S N or Model information AccuTemp Service Dept Phone 800 480 0415 AccuTemp Service Dept Email service aaccutemp net SP8027 1203 Pg 12 LOCATION OF ELECTRICAL COMPONENTS is A Solid ai A Control LM l J State GC W Ce ai j 1 Keypad Relays i y w Board Heat Sinks Power Cord Contactor Heater PWR Water Sensors Terminal Strip Transformer Fuses Water Sensor Control Control Board Relay 1 Pg 13 SP8027 1203 ELECTRICAL COMPONENTS REMOVAL amp INSTALLATION CORD PLUG ASSEMBLY 1 Unplug the Unit 2 Remove the Left Side Panel by removing the Sheet Metal Screws holding it in place 3 Disconnect the Power Cord Leads Black White Red and or Green from L1 3 of the Contactor note the wire color to its location terminal 4 On the inside of the unit remove the retaining nut on the threads of the Power Cord Cable Fitting amp pullout the Power Cord 5 Re install in reverse order FUSES 1 Unplug the Unit 2 Remove the Left Side Panel by removing the Sheet Metal Screws holding 1t in place 3 Pry the Fuses out of the Fuse Block with a flat head screwdriver or fuse puller 4 Re install in reverse order CONTACTOR 1 Unplug the Unit 2 Remove the Left
30. oxed text while others maybe just picture icons Please give this information the respect they deserve for safe operation Warning Text Boxes Symbol Icons Below are definitions of the warning text boxes Below are definitions of the symbol icons used in this manual Notifies the reader of an important Indicates an imminently hazardous situation message or warning usually a which if unchanged will result in death or safety related message serious injury A INFORMATION WARNING 1 Notifies the reader of an important information that may or may not be safety related Indicates a potentially hazardous situation which if unchanged will result in death or serious injury CAUTION CAUTION HOT SURFACE Indicates a potentially hazardous situation which if unchanged will result in minor or moderate injury DANGEROUS VOLTAGE Advises the reader of information or instructions vital to the operation or EARTH GROUND maintenance of the eguipment SP8027 1203 ii SAFETY PRECAUTIONS DANGER ELECTRICAL SHOCK HAZARD WHILE WORKING ON ENERGIZED EOUIPMENT Unplug eguipment prior to removing any components effected by electricity BURN HAZARD WHILE WORKING ON STEAM PRODUCING EOUIPMENT When accessing the cooking chamber be sure to always stand back while slowing opening the door to allow the chamber to vent off the steam Never reach into the cooking chamber before it has completely vented off th
31. peration 1lluminating the High Water Over Fill Indicator Lamp and sounding the buzzer e The loss of Control Relay 1 will remove the power signal to the Contactor s control coil which opens the contacts and prevents Line Voltage to the Solid State Relay s This stops the Cast Heater from generating heat To restart the steamer open the Drain Valve to drain the water until the High Water Over Fill Indicator Light goes out Press the PWR button ON to restart the start up procedure SP8027 1203 Ps 6 SEOUENCE OE OPERATION CAST HEATER GENERATING HEAT OPERATION Manual amp Auto Fill Power Cord Plugged In PWR Button Not Pushed Line Voltage comes into the 3 Pole Contactor s Ll L3 terminals Refer to the unit s specific wiring schematics to determine the wire color to L Terminal location Line Voltage 1s then taken off of LI L2 of the Contactor and applied to the Transformer which steps down the Line Voltage to 24VAC From the two 1 25Amp fuses power goes through the Overtemp Switch then goes to the Water Sensor Board to Control Relay 1 CR 1 coil to the High Water Overfill Reed Switch Auto Fill Only to the Control Keypad Board and to Pin 6 of CR 1 Power also flows through CR 1 Control Keypad Board Water Sensor Board and Contactor once the water level condition is met The red LED light on the Water Sensor Board will be flashing continuously PWR Button Pushed amp Low Water Level Sensor Is
32. witch 1s used in conjunction with a Float Ball If the Water Over Fill AT0A 3519 2 water rises too high the switch opens and turns off the steamer Sensor Switch When the switch opens the High Water Overfill LED will light The OPTIONAL Float Ball user will have to drain the water out and turn the steamer back ON A10P 3233 1 otherwise the steamer will remain shutdown Control Relay 71 ATOE 2825 5 Controls AC Volt input amp output signals which provide actions from AC the Water Sensor Board and Auto Fill Valve 1f installed Magnetic Switch used to ensure that the door 1s closed and latched prior to generating steam Ee dk Solid State Relay s will not activate if this switch is not closed Door Open SH 34769 amp Up Normally closed switch that allows pressure to build up inside the ATOE 3617 2 steam chamber Opens when the steam chamber pressure reaches 1 2 PSI SF 34768 amp Lower Solid State Relay S will not activate 1f this switch 1s not closed ATIA 3847 Switch Open Chamber Pressure Switch Provides line voltage to the Cast Heater elements once the Controller Keypad Board sends the 24V control signal to the relay s The relay s are only activated 1f the Door Switch amp Chamber Pressure Switch are closed The number of Solid State Relays used depends on the phase and wattage needs of the unit Solid State Relay ATOE 2059 3 6 KW AT1A 3530 1 8 KW AT1A 3530 2 Transfers the heat generated from t
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