3D Connexion PS520 User's Manual
Contents
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3. 7 Wait for the oven to heat to the setpoint temperature Higher setpoint temperatures will require a longer wait The oven can reach a temperature of 500 F 232 C in approximately 15 minutes Optional Press the Tem perature key to show the Actual Temperature in the display and wait for the ACTUAL TEMP lightto turn on This allows you to monitor the oven temperature as it rises to the setpoint wait for 2 ACTUAL TEMP Allow the oven to preheatfor 10 minutes after ithas reached the set point temperature DAILY SHUTDOWN PROCEDURE Turn the HEAT HEAT T amp BLoweR and BLOWER swit ches to the OFF O position Note that the blowers will remain in operation until the oven has cooled to below 200 F TS OFF ON 93 Make certain that there CONVEYOR are no products left on the OFF of conveyor inside the oven Turn the CONVEYOR switch to the OFF O position After the oven has cooled and the blowers have turned to the OFF or O position switch the circuit breaker fuse disconnect to the OFF or O position IMPORTANT On gas ovens if the HEAT ON light will not illuminate OR if the oven does not heat the gas burner may not have lit Turn the HEAT 2 BLOWER CO and CONVEYOR switches to the OFF position Wait f
4. lt yas A RA INSTALLATION KIT Double Stack Oven P N 59183 DESCRIPTION INSULATION BOTTOM TRAY BOTTOM TRAY WELDMENT TOP COVER SCREW MSSLT THREAD 8 32 x 1 2 18 8 LEG 4 AD FT OWNER S OPERATING amp INSTALLATION MANUAL GAS HOSE RESTRAINT CABLE GAS HOSE PARTS LIST FOR SERIES PS520 Gas OVEN 2 o o lt 48392 48394 48396 51387 M3828 59223 22450 0228 22361 0001 Gi INSTALLATION KIT Triple Stack Oven P N 59184 DESCRIPTION INSULATION BOTTOM TRAY BOTTOM TRAY WELDMENT TOP COVER SCREW MSSLT THREAD 8 32 x 1 2 18 8 PIN ALIGNMENT OWNER S OPERATING amp INSTALLATION MANUAL GAS HOSE RESTRAINT CABLE GAS HOSE Figure 2 1 continued PS520 Series Gas Oven Installation Parts 9 SECTION 2 INSTALLATION Figure 2 5 MODEL PS520 SINGLE OVEN DIMENSIONS 1 78 45mm ee uu ELECTRICAL 7 17 12 INLET PA aes 1 4348mm D die Marone OVERALL 21 10 536mm 14 62 109 371mm mm 747 10 490mm 101 6mm FRONT VIEW 5 82 42 00 1182 148 1067 300mm EXTENTION CONVEYOR EXTENTION gt 37 46 951mm WITH STANDOFFS 18 75 476mm CONVEYOR 2675 BOTTOM VIEW FRONT LEGS 2177 553 TO CENTER 17 50 445mm TO CENTER The Opening Height is Adjustable 2 1 4 inch mini
5. iddleby PS520 Series Gas Ovens English Marshall A MIDDLEBY COMPANY owner s operating amp installation manual PS520 Series OVENS Model PS520G PS520 Single 909 0 al f PS520 Double PS520 Triple p Part 59223 Rev 2012 Middleby Marshall Inc Price 30 00 P 04 12 NOTICE This Owner s Operating and Installation Manual should be given to the user The operator of the oven should be familiar with the functions and operation of the oven This manual must be kept in a prominent easily reachable location near the oven Ovens are shipped from the factory configured for use with natural gas If permitted by local national and international codes at the time of installation the oven may be converted to propane gas operation This conversion requires the use of at Gas Conversion Kit that is supplied with the oven For CE approved ovens the conversion is described in the Installation section of this Manual For domestic and standard export ovens instructions are included in the Gas Conversion Kit It is suggested to obtain a service contract with a Middleby Marshall Authorized Service Agent WARNING POST INA PROMINENT LOCATION THE EMERGENCY TELEPHONE NUMBER OF YOUR LOCAL GAS SUPPLIER AND INSTRUCTIONS TO BE FOLLOWED IN THE EVENT YOU SMELL
6. 36 Conveyor Belt Link 37 H Attaching Drive Chain eene 38 MAINTENANCE EVERY 3 MONTHS 39 A Electrical 2 2 39 B Ventilation 1 eene nnn 39 IV MAINTENANCE EVERY 6 MONTHS 39 PS520 SERIES GAS OVEN KEY SPARE PARTS eiii wie rese a asean trie cuir arae capace ig 40 KEY SPARE PARTS KIT 40 SECTION 5 TROUBLESHOOTING Troubleshooting Charts eese 41 SECTION 6 ELECTRICAL SCHEMATICS Wiring Diagram G208 240V 50 60 GO PS520 43 NOTE Wiring Diagrams are in Section 6 of this Manual The diagram for each oven is also on the lower inner surface of its Control Console SECTION 1 DESCRIPTION SECTION 1 DESCRIPTION MODEL IDENTIFICATION The Middleby Marshall PS520 Series may be used either as a single oven or stacked for use as double or triple ovens Asingle PS520 Series Oven Figure 1 1 is mountedon a base pad with legs A double oven Figure 1 2 consists of two stacked single ovens A triple oven Figure 1 3 consists of three stacked single ovens The lower oven is mounted on a base pad with stacking pins On a double or triple oven the ovens operate indepen dently All ovens use identical controls and com
7. 2 08mm 45 drill 6 12 W C 14 9 29 9mbar 1 49 3 KPA 3 5 W C 8 72mbar 0 872 KPA _ Propane 0 057 1 45mm 46 drill 11 14 W C 27 4 34 9mbar 2 74 3 5 KPA 7 W C 17 44mbar 1 75 KPA __ The gas supply pressures and orifice sizes shown are for ovens installed in North America The required gas supply pressures and orifice sizes of ovens installed in other locations are dependent on the local gas type and on all applicable local codes GAS ORIFICE AND PRESSURE SPECIFICATIONS PER OVEN CAVITY CE OVENS Supply Inlet Pressure IT PT ES SE Main UK CH IT AT SE CH AT DK BE E IT PT Orifice Rated Gas Orifice DK FI DE BE FR FI DE NL ES UK Manifold Heat Type dia Ds Le T Los L Pressure Input G20 2 3749 20 20 20 11 21 22 36 ERRATE mMm mMbar mbar Mbab Mbat KW hr G25 2 3749 16 19 22 36 Inmac decer cadet Jee SMDEL sz o G30 1 3970 29 50 28 30 37 26 2 22 59 mm mbar or 50 mbar mbar kW hr NOTE Wiring Diagrams are contained in Section 6 of this Manual and are also located inside the oven at the bottom of the Control Panel Additional electrical information is provided on the oven s serial plate This Manual Must Be Kept For Future Reference SECTION 1 DESCRIPTION Il COMPONENT FUNCTION Figure 1 4 Console Controls Temperature Control
8. e line tee with pressure tap 15 SECTION 2 INSTALLATION Connect a suitable pressure gauge to pipe line or to outlet pressure tap of gas control concerned to measure burner pressure measuring point must be as near to burner as possible Make sure that the appliance is in operation and the Modu plus coil is energized with maximum current If maximum rate pressure needs adjustment use an 8 mm wrench to turn adjustment screw for maximum pressure set ting clockwise to increase or counter clockwise to decrease pressure until the desired maximum outlet pressure is obtained Disconnect electrical connection of the Moduplus Check minimum pressure setting and readjust if necessary SeeAdjusting Minimum Pressure Setting for proper adjusting procedure Reconnect pressure feedback connection if appcable If minimum and maximum pressures are set wire the Mo duplus in circuit Close pressure tap screw Adjusting the Minimum Pressure Setting Disconnect pressure feedback connection if appcable Connect a suitable pressure gauge to pipe line or to outlet pressure tap of gas control concerned to measure burner pressure measuring point must be as near to burner as possible Disconnect electrical connection of the Moduplus Energize operator set control in operation and wait until an outlet pressure is recorded on pressure gauge If minimum rate pressure needs adjustment use an 8 mm wrenchto turn adjustm
9. 2 Lift conveyor and install drive chain to conveyor drive sprocket and motor sprocket Figure 4 32 3 The angle plate located on the underside of the con veyor must be against the lower end plug This is true on both sides of oven SEE Vi Crumb Pan Mounting Bracket 7 Lower End Plug Figure 4 33 38 SECTION 4 MAINTENANCE 4 Reattach conveyor guard to control panel and secure Electrical Terminals Moscow Open the control cabinet door by removing the three Install both upper end plugs screws from the control cabinet door Tighten all electrical control terminal screws including the electrical contactor terminal screws as shown in Figure 4 35 Figure 4 34 Figure 4 35 Ill MAINTENANCE EVERY 3 MONTHS B Ventilation Check that the air circulation throughout the oven is not blocked and is working properly WARNING Shut OFF all electrical power and lock tag out the switch before attempting maintenance work IV MAINTENANCE EVERY 6 MONTHS A Check brushes on D C conveyor motor when worn NOTE Itis recommended thatthe 3 month maintenance less than 1 10 2 4mm replace the brushes be performed by an authorized Middleby Marshall B Check your oven venting system technician C Inspect and clean the burner nozzle and the spark electrode assembly IMPORTANT NOTICES Installation of replacement parts
10. GAS Instructions to be followed in the event the user smells gas shall be obtained by consulting the local gas supplier If the smell of gas is detected immediately call the emergency phone number of your local Gas Company They will have personnel and provisions available to correct the problem WARNING FOR YOUR SAFETY DO NOT STORE OR USE GASOLINE OR OTHER FLAMMABLE VAPORS AND LIQUIDS IN THE VICINITY OF THIS OR ANY OTHER APPLIANCE WARNING IMPROPER INSTALLATION ADJUSTMENT ALTERATION SERVICE OR MAINTENANCE CAN CAUSE PROPERTY DAMAGE INJURY OR DEATH READ THE INSTALLATION OPERATION AND MAINTENANCE INSTRUCTIONS THOROUGHLY BEFORE INSTALLING OR SERVICING THIS EQUIPMENT WARNING THIS APPLIANCE MUST BE INSTALLED ONLY BY AN AUTHORIZED PERSON IN COMPLIANCE WITH AS NZS 5601 1 THESE INSTRUCTIONS LOCAL AUTHORITY GAS ELECTRICITY AND ANY OTHER RELEVANT STATUTORY REGULATIONS NOTICE The warranty is NOT VALID unless the oven is installed started and demonstrated under the supervision of a factory authorized installer NOTICE Contact your authorized Service Agency to perform maintenance and repairs A Service Agency Directory is supplied with your oven NOTICE Using any parts other than genuine Middleby Marshall factory manufactured parts relieves the manufacturer of all warranty and liability NOTICE Middleby Marshall Manufacturer reserves the right to change specifications at any time KEEP THIS MANUAL IN A VISIBLE LO
11. a ventilation hood for adequate air supply and ventilation CAUTION Do not obstruct the flow of ventilation air to and from your oven Do not obstruct the fan holes in the rear of the unit 1 UNLOADING Your Middleby Marshall PS520 Series Oven is shipped partially assembled It will arrive in a carton on a crate Carton size for a PS520 Series Oven is 44 1 4 1124mm Long x 37 1 2 953mm Wide x 23 584mm High x Thecrate and carton mustbe examined before signingthe Bill of Lading Report any visible damage to the transport company and check for the proper number of crates If apparent damage is found make arrangements to file a claim against the carrier Surface Interstate Commerce Regulations U S A require that the claim must be initi ated by the consignee within 10 days from the date that the shipment is received PARTS LIST FOR SERIES PS520 GAS OVEN INSTALLATION KIT Single Stack Oven P N 59182 ITEM NO QTY PART NO DESCRIPTION 1 4 3101908 LEG 4 AD FT 2 2 48392 INSULATION BOTTOM TRAY 3 1 48394 BOTTOM TRAY WELDMENT 4 1 48396 TOP COVER 5 4 51387 SCREW MSSLT THREAD 8 32 x 1 2 18 8 6 1 59223 OWNER S OPERATING amp INSTALLATION MANUAL 7 1 22450 0228 GAS HOSE RESTRAINT CABLE 8 1 22361 0001 GAS HOSE Figure 2 1 PS520 Series Gas Oven Installation Parts 8 SECTION 2 INSTALLATION PARTS LIST FOR SERIES PS520 Gas OVEN PART NO 48392 48394 48396 51387 3101908 59223 22450 0228 22361 0001 z
12. call your Middleby Marshall Service Agency PROBLEM CONVEYOR WILL NOT HOLD PROPER SPEED OR WILL NOT RUN AT ALL Check whether the conveyor is jammed on something in oven Check for proper tension of conveyor drive chain and conveyor belt Refer to Section 4 for correct procedure Check that the conveyor drive sprocket is tight If conveyor still does not run correctly contact your Middleby Marshall Service Agency PROBLEM OVEN DOES NOT TURN ON WHEN ITS SWITCHES ARE TURNED ON Check that all electric supply switches are set to the or I position Then start the oven If oven still will not start contact your Middleby Marshall Service Agency 41 SECTION 5 TROUBLESHOOTING NOTES 42 SECTION 6 ELECTRICAL SCHEMATICS SECTION 6 ELECTRICAL SCHEMATICS 981169 50zSSd O9 09 06 072 8020 wesbeig YAOOZ AOZ JYQNOD3S ZH 09 05 082 072 JYNIHd HHN3X 9 qun x owy OO OWN o av o o ANOD es A lt gt MS ANOD 13NOVA 304 010 ANOD 3 SDNILLAS gt gt HOLIMS TNN n dia AV asia 0 03355
13. minimum clearances are specified in the Description section of this Manual WARNING Do not obstruct the flow of combustion and ventilation air to and from your oven There must be no obstructions around or underneath the oven Constructional changes to the area where the oven is installed shall not affect the air supply to the oven CAUTION For additional installation information contact your local Authorized Service Agent NOTE There must be adequate clearance between the oven and combustible construction Clearance must also be provided for servicing and for proper operation NOTE An electrical wiring diagram for the oven is located inside the machinery compartment NOTE All aspects of the oven installation including placement utility connections and ventilation requirements must conform with any applicable local national or international codes These codes supersede the requirements and guidelines provided in this manual NOTE In the USA the oven installation must conform with local codes In the absence of local codes gas oven installations must conform with the National Fuel Gas Code ANSI 2223 1 Installed ovens must be electrically grounded in accordance with local codes or in the absence of local codes with the National Electrical Code or NOTE In Canada the oven installation must conform with local codes In the absence of local codes gas oven installations must conform with t
14. requiring access to the interior of the oven is permitted only by an authorized service technician f there are any problems with the operation of the oven the authorized service technician must be called t is suggested to obtain a service contract with a manufacturer s authorized service technician 39 SECTION 4 MAINTENANCE KEY SPARE PARTS KIT An oven can be purchased with a Key Spare Parts Kit Parts that can reduce serious downtime and loss of pro Figure 4 36 The kit can be purchased when the oven duction if a failure occurs is ordered or later from a Middleby Marshall Authorized Replacement parts for this kit can be purchased from Parts Distributor The kit contains many of the crucial your Middleby Marshall Authorized Parts Distributor PS520 SERIES GAS OVEN KEY SPARE PARTS KIT Figure 4 36 ITEM PART NO ENGLISH DESCRIPTION QUANTITY 1 28041 0011 Contactor DP 25A 208 240V 1 2 58390 Motor Conveyor Drive w Magnet 1 3 60671 Board Amplifier Signal 4 20VDC 1 4 32108 XFMR 240V PRI 24V 65VA SEC 1 5 33812 5 Thermocouple Type J Shielded 2 50 x 120 3 6 33813 Filter RFI 1 7 38185 Assembly Pickup Sensor 1 8 41872 Transformer 240V P 24V S 25VA 1 9 44696 Switch Rotary and Mounting Adapter 3 10 44697 Block Contact 3 11 45644 Breaker Circuit 240V 1A 1 12 48455 Ignitor Single Rod PS536 1 13 50239 Ignition Spark Module 24VAC 50 60 Hz 1 14 60598 Switch Air 13 WC 1 15 50794 Relay 240VAC 2P
15. the connections for the ventilation System electric and gas supplies as arranged by the customer Following these connections the factory authorized installer can perform the initial startup of the oven Checkthe oven data plate Figure 2 10 before making any electric supply connections Electric supply connections must agree with data on the oven data plate NOTE The electric supply installation must satisfy the requirements of the appropriate statutory authority such as the National Electrical Code NEC ANSI NFPA70 U S A the Canadian Electrical Code CSA C222 the Australian Code AG601 or other applicable regulations A fused disconnect switch or a main circuit breaker customer furnished MUST be installed in the electric supply line for each oven it is recommended that this switch circuit breaker have lockout tagout capability The electric supply connection must meet all national and local MIDOLEB Y e MARSHALL 400 TOASTMASTER DRIVE ELGIN ILINDIS 60020 USA INTERNATIONAL CE PLATE Figure 2 10 Typical Electric Oven Data Plate electrical code requirements Copper is the recommended material for the electrical supply conductors IV ELECTRIC SUPPLY FOR GAS HEATED OVENS Power requirements for gas heated ovens are 208 240VAC 1 phase 3 wire 2 hot 1 ground Electrical connection is made through a cord and plug Using flexible cable s forthe electrical power supply conductors requires a 2 51m
16. 1S 1 16 47321 Control Combo 4 20MA Burst 1 17 58323 Controller Digital w o Dip Switch 1 18 60679 Valve Gas Modulating 1 19 36451 Fan Cooling 280VAC 295 1 20 50240 Ignition Cable 25 1 21 59002 Inshot Burner 2 22 52244 Main Blower 2 Figure 4 36 40 SECTION 5 TROUBLESHOOTING SECTION 5 TROUBLESHOOTING PROBLEM PRODUCTS ARE OVERCOOKED OR UNDERCOOKED Check for correct setting on tempera ture controller Check for correct setting of conveyor speed control Turn temperature control to correct setting Verify the food prepa ration process If products still cook incorrectly call your Middleby Marshall Set the conveyor speed control at correct setting Service Agency PROBLEM OVEN DOES NOT HEAT Check to see if both BLOWER switch and HEAT switch are in the ON or I position If oven does not heat call your Middleby Marshall Service Agency PROBLEM BLOWER MOTOR IS RUNNING YET LITTLE OR NO AIR BLOWS FROM AIR FINGERS Air fingers reassembled incorrectly after cleaning Assemble air fingers correctly after cleaning Refer to Section 4 procedure or call your Middleby Marshall Service Agency PROBLEM OVEN BLOWER AND CONVEYOR OPERATE YET THE OVEN IS NOT HEATING Reset the temperature controller to a new setting above 200 F after turning the BLOWER switch to off for 30 seconds Start the oven again If the oven still does not heat
17. CATION NEAR THE OVEN FOR FUTURE REFERENCE Model No Serial No Installation Date Mod le No Seri No MIDDLEBY MARSHALL No QUIBBLE LIMITED WARRANTY U S A ONLY MIDDLEBY MARSHALL HEREINAFTER REFERRED TO AS THE SELLER WARRANTS EQUIPMENT MANUFAC TURED BY IT TO BE FREE FROM DEFECTS IN MATERIAL AND WORKMANSHIP FOR WHICH IT IS RESPONSIBLE THE SELLER S OBLIGATION UNDER THIS WARRANTY SHALL BE LIMITED TO REPLACING OR REPAIRING AT SELLER S OPTION WITHOUT CHARGE ANY PART FOUND TO BE DEFECTIVE AND ANY LABOR AND MATE RIAL EXPENSE INCURRED BY SELLER IN REPAIRING OR REPLACING SUCH PART SUCH WARRANTY SHALL BE LIMITED TO THE ORIGINAL PURCHASER ONLY AND SHALL BE EFFECTIVE FOR A PERIOD OF ONE YEAR FROM DATE OF ORIGINAL INSTALLATION OR 18 MONTHS FROM DATE OF PURCHASE WHICHEVER IS EARLIER PROVIDED THAT TERMS OF PAYMENT HAVE BEEN FULLY MET This warranty is valid only if the equipment is installed started and demonstrated under the supervision of a factory authorized installer Normal maintenance functions including lubrication clean ing or customer abuse are not covered by this no quibble warranty Seller shall be responsible only for repairs or replacements of defective parts performed by Seller s authorized service per sonnel Authorized service agencies are located in principal cities throughout the contiguous United States Alaska and Hawaii This warranty is valid in the 50 United States and is void else
18. CAUTION Be careful not to bump the drive sprocket while handling the conveyor to avoid damaging the drive shaft 30 B Air Fingers Disassembly For Cleaning 1 As the air fingers are removed use a felt pen to mark all parts of the fingers This includes the finger manifold inner plate and the outer plate refer to Figure 1 9 If a blank or choke plate is used markthat plate also Fingers are marked in the order shown as viewed from the front of the oven The marks for an upper oven should be preceded with a U example UB1 UT2 etc Standard Fingers 2 Slide blank plates straight out Figure 4 8 3 Remove air fingers NOTE Some oven users require a custom finger ar rangement where the quantity of air fingers may vary You can remove top and bottom fingers and blank plates from each or either end It is highly recommended that each finger be marked before removing so it is placed in exactly the same position when reassembled refer to step 1 Remove the air fingers pull the finger at the back side pull straight out 31 SECTION 4 MAINTENANCE o Figure 4 9 4 With air fingers out place them in an upright position to remove the outer plate 5 Gently step on the lip of the finger and pull the outer plate off Figure 4 10 SECTION 4 MAINTENANCE 6 Toremove the inner plate the
19. ENCY DIRECTORY IS SUPPLIED WITH YOUR OVEN 26 SECTION 4 MAINTENANCE SECTION 4 MAINTENANCE WARNING Before ANY cleaning or servicing of the oven perform the following procedure Switch off the oven and allow it to cool Do NOT service the oven while it is warm Turn the full flow gas safety valve to the off position Turn off the electric supply circuit breaker s and disconnect the electric supply to the oven If it is necessary to move a gas oven for cleaning or servicing disconnect the gas supply before moving the oven When all cleaning and servicing is complete 4 Tum on the full flow gas safety valve Test the gas line 1 If the oven was moved for servicing return the oven to its connections for leaks using approved leak test substances original location or thick soap suds 2 Reconnect the gas supply Turn on the electric supply circuit breaker s 3 Reconnect the electrical supply Perform the normal startup procedure WARNING Possibility of injury from rotating parts and electrical shock exist in this oven Turn off and lockout or tagout electrical supply to oven s before attempting to disas semble clean or service oven s Never disassemble or clean the oven with the blower switch or any other part of the oven turned on WARNING Before performing any maintenance work or cleaning turn main power switch off CAUTION When cleaning do not use any abrasive cleaning materials or water spray wipe clean only Neve
20. Forallovens equipped with casters the gas line connection shall be made with A connector that complies with the Standard for Connectors for Movable Gas Appliances ANSI Z21 69 in USA or Connectors for Movable Gas Appliances CAN CGA 6 16 in Canada Check the oven s gas supply requirements to determine the type of gas to be used with the oven If the gas type required does NOT match the local supply For North American installations a conversion kit is supplied with the oven to allow operation using propane gas Refer to Part B Gas Conversion in this section For CE ovens directions for converting the oven for use with other gases are described in Part D 1 Preparation for Use with Various Gases in this section If the installation will use the supplied gas hose be sure that the 1 2 to 3 4 gas line fitting is attached Refer to the instructions in the gas hose package One gas line connection method is shown in Figure 2 15 however compliance with the applicable standards and regulations is mandatory Inlet and regulated gas pressures can be measured using U tube manometer at the tap locations shown in Figures 2 15 and 2 16 1 Checking the Gas Supply Inlet Pressure a With the main gas supply valve closed and the circuit breaker fused disconnect in the OFF O position open the inlet pressure tap shown in Figure 2 16 and attach a manometer to the tap b Depress the safety switches to allow th
21. G OVEN Serious damage could be done to the burner blower motor and or solid state electrical components if oven is operated while cooling fan is not running or vent grille is plugged 3 Using a stiff nylon brush clean control compartment vent grille C Conveyor Belt Figure 4 2 Everyday just after starting the oven stand at the un loading end of the conveyor and with a brush remove food particles crumbs etc clinging to the conveyor belt brushing them into the crumb pan 28 D Crumb Pans Figure 4 2 WARNING Crumb pan is extremely hot while oven is operating Allow oven to cool before removing crumb pan When the oven is cool remove and clean the crumb pan at each end of the oven Each crumb pan can be removed by sliding it out as shown in Figure 4 2 Reinstall the crumb pans after cleaning Cooling Fan Grille ni TN Tum JJ Figure 4 1 Oven Cooling Fans Figure 4 2 Conveyor Belt and Crumb Pan Cleaning Il MAINTENANCE MONTHLY NOTE The oven interior may require cleaning more than once a month depending on the volume of baking To clean the interior you have to disassemble some parts of the oven When cleaning your Series PS520 Oven note the following PRECAUTIONS 1 Do not use excessive water or saturation o
22. IST FOR SERIES PS520 GAS OVEN INSTALLATION KIT eere 8 UTILITY ROUGH IN DIMENSIONS AND POSITIONING FOR PS520 SERIES 13 CIRCUIT 13 ELECTRICAL SPECIFICATIONS 13 ELECTRICAL 13 SUPPLY WIRE 2 iiie einen itio curent inet oneri 13 9 13 Il VENTILATION GUIDELINES e 13 Ill ELECTRICAL CONNECTION INFORMATION FOR PS520 SERIES 14 IV ELECTRIC SUPPLY FOR GAS HEATED OVENS 14 Vi GAS SUPPLY eiae iiec creen ecrit ma uei us 15 SECTION 3 INSTALLATION 1 CONTROL FUNCTIONS eere 19 COMPONENT INFORMATION AND LOCATION 20 A Door Safety Switch eene 20 B Blower Switch 1 20 C Heat Switch iesu 20 D Temperature 20 E Gonveyor 21 MEASURING CONVEYOR SPEED 21 TABLE OF CONTENTS Continued Pa
23. Possibility of injury from rotating parts and electrical shock exist in this oven Never disassemble or clean the oven with the blower switch or any other part of the oven turned ON or I Turn OFF or and lock out or tagout all electrical power to the oven before attempting to clean or service this oven SECTION 3 OPERATION cd Minutes Seconds Figure 3 3 Conveyor Speed Digital Control Figure 3 4 Product at entrance end of baking chamber BEGINNING OF TIMING Figure 3 5 Product at exit end of baking chamber END OF TIMING SECTION 3 OPERATION WARNING OVEN MUST BE KEPT CLEAR OF COMBUSTIBLES AT ALL TIMES STEP BY STEP OPERATION A Startup Procedures Daily Startup 1 Turn the BLOWER switch Figure 3 6 to the ON or position This starts the main blower fan and the cool ing fans The blower circulates air through the air fingers and must stay on during the cooking or baking process 2 Check to see if the cooling fans See Figure 1 8 are operating when the blower switch see Figure 3 6 is turned ON or I The cooling fans cool the control components and blower motor The cooling fans located at the rear of the oven blows air into and through the cabinet Air is exhausted through the front of the cabinet and also out the front of the oven Refer to Daily Maintenance Section for fan intake checking p
24. SIONS AND POSITIONING FOR PS520 SERIES OVENS WARNING DO NOT USE CONDUIT OR GAS LINE FOR GROUND CONNECTION CAUTION IT IS RECOMMENDED THAT THE OVEN BE PLACED UNDER A VENTILATION HOOD FOR ADEQUATE AIR SUPPLY AND VENTILATION ELECTRIC SUPPLY TO BE PROVIDED BY CUSTOMER CIRCUIT BREAKER Separate circuit breaker with lockout tagout electrical shutoff for each oven Wire each oven separately 15A Amp circuit breaker for 208 240V ELECTRICAL SPECIFICATIONS DOMESTIC 208V main blower motors 1 Ph 1 5 Amp draw 50 60 Hz 208 240V control circuit 2 pole 3 wire system per oven 2 hot 1 grd Do NOT use conduit for ground or DOMESTIC or EXPORT 240V main blower motors 1 Ph 1 5 Amp draw 50 60 Hz 208 240V control circuit 2 pole 3 wire system per oven 2 hot 1 grd 230V main blower motors 1 Ph 1 5 Amp draw 50 60 Hz 208 240V control circuit 2 pole 3 wire system per oven 2 hot 1 grd Do NOT use conduit for ground 13 To Oven code Suggested dimensions are shown utility gt a requirements supersede any factors shown Figure 2 9 Typical PS520 Series Oven s Installation POWER RATING 40 000 BTU hr 11 7 kW hr SUPPLY WIRE Supply wire size must be in accordance with the National Electrical Code current edition and must be in compli ance with local codes SUGGESTED If space permits servi
25. all be performed during regular working hours Overtime premium will be charged to the Buyer This warranty is not valid unless equipment is installed started and demonstrated under the supervision of a factory authorized installer Normal maintenance functions including lubrication adjustment of airflow thermostats door mechanisms microswitches burners and pilot burners and replacement of light bulbs fuses and indicating lights are not covered by warranty Any repairs or replacements of defective parts shall be performed by Seller s authorized service personnel Seller shall not be responsible for any costs incurred if the work is performed by other than Seller s authorized service personnel When returning any part under warranty the part must be intact and complete without evidence of misuse or abuse freight prepaid Seller shall not be liable for consequential damages of any kind which occur during the course of installation of equipment or which result from the use or misuse by Buyer its employees or others of the equipment supplied hereunder and Buyer s sole and exclusive remedy against Seller for any breach of the foregoing warranty or otherwise shall be for the repair or replacement of the equipment or parts thereof affected by such breach The foregoing warranty shall be valid and binding upon Seller if and only if Buyer loads operates and maintains the equipment supplied hereunder in accordance with the instruct
26. ce should be located near the control console end of the oven s to allow convenient access to safety switches CAUTION UNIT MUST HAVE AIR VENT PLATES IN STALLEDOR WARRANTY WILL BE VOID ll VENTILATION GUIDELINES A mechanically driven ventilation system is required for the PS520 Series Middleby Marshall conveyorized gas ovens Local codes and conditions vary greatly from one area to another and must be complied with Following are the suggested requirements for good ventilation Please rememberthese are recommendations or guidelines you may have a special condition or problem that will require the services of a ventilation engineerorspecialist Proper ventilation is the oven owner s responsibility Improper ventilation can inhibit oven performance Please Note There are now two stand off C Channels and the plate for Double and Triple Ovens that must be installed in the field SECTION 2 INSTALLATION These C Channel brackets are installed in the vertical plane using existing screws Item 6 to support these C Channels using the upper and lower Key Hole openings in the C Channels The C Channels are identical and once installed will allow ample amounts of air through the cooling fan mounted on the rear side of the oven by keeping the oven away from the rear wall ELECTRICAL CONNECTION INFORMATION FOR PS520 SERIES OVENS WARNING Authorized supplier personnel normally accomplish
27. e circuit breaker fused disconnect are in the OFF O position After com pleting these procedures perform a gas leak test before operating the oven CAUTION The terms of the oven s warranty require all start ups conver sions and service work to be performed by a Middleby Marshall Authorized Service Agent The installation start up and changes required when changing from one gas type to another can be performed ONLY by a certified professional NOTE Certain safety code requirements exist for the installation of gas ovens refer to the beginning of Section 2 for a list of the installation standards In addition In the USA the installation must conform with local codes or in the absence of local codes with the National Fuel Gas Code ANSI 7223 1 In Canada the installation must conform with local codes or inthe absence of local codes with the Natural Gas Installation Code CAN CGA B 149 1 or the Propane Installation Code CAN CGA B 149 2 as applicable In Australia the installation must conform with AGA Codes AG311 and AG601 and with any requirements of the appropriate statutory authority n CE countries the gas supply connection should be ac cording to EN 203 gas appliance directive and to applicable ISO 228 1 or ISO 7 1 recommendations All aspects of the gas supply connection must comply with current IEC CEE requirements and with all applicable local national and international codes
28. e display Service Key Service use only Set Point Key Press this key togeth er with the Unlock Key to allow the Set Point to be changed Changes can only be made for 60 seconds SECTION 3 OPERATION V QUICK REFERENCE TROUBLESHOOTING SYMPTOM OVERTEMP light is lit food product is undercooked PROBLEM The oven temperature ex ceeded 650 F 343 C and the burnerwas automatically shut down Oven will not turn on at all Electrical power may not be reaching the oven or the controls may be set incorrectly L l r IL appears in display oven is not heating The oven did not reach 200 F 93 C within 15 minutes of startup and the oven has stopped heating Oven will not heat Controls may be set incor rectly Oven is operating but little or no air is blowing from air fingers Air fingers may have been reassembled incorrectly after cleaning Conveyor moves with a jerky motion or will not move at all Conveyor may be jammed on an object in the oven or conveyor belt or drive chain tension may be incorrect Food products are over cooked or undercooked Controls may be set incor rectly SOLUTION Follow the procedures under Daily Shutdown Procedures in this section to shut down the oven Contact your Middleby Marshall Authorized Service Agent to determine and correct the cause of the condition to prevent damage to the oven Check that
29. e oven to operate c Open the main gas supply valve Switch the circuitbreaker fused disconnect to the ON I position d Start the oven according the directions in the Operation section of this Manual Adjust the temperature controller to the maximum setting 316 C e Measure the supply inlet pressure f Switch the oven off Close the main gas supply valve and switch the circuit breaker fused disconnect to the OFF position Remove the manometer and close the inlet tap g Compare the measured supply inlet pressure to the nominal pressures shown in Table 1 5 in the Description section of this Manual If the supply pressure is lower or higher than the nominal pressure the reason should be investigated and the gas supplier contacted For natural gas ovens if the measured supply pressure is lower than 0 247psi or higher than 0 363psi contact the gas supplier DO NOT OPERATE THE OVEN or adjust the oven controls 17 SECTION 2 INSTALLATION SECTION 2 INSTALLATION NOTES SECTION 3 OPERATION SECTION 3 OPERATION CONTROL FUNCTIONS Blower Heat Temperature Switch Switch Controller Conveyor s Speed lr j dieby Control LI enel Conveyor Switch Figure 3 1 PS520 Series Oven Control Functions WARNING A possibility of injury from rotating parts and electric shock exists in this oven Never disassemble or clean
30. enance A Gas Utility Rough In Recommendations The following gas system specifications are STRONGLY RECOMMENDED Deviating from these recommendations may affect the baking performance of the oven Gas Meter 650 cfh 307 min meter Gas Line DEDICATED LINE from the gas meter to the oven 2 50 8 pipe for natural gas e 1 1 2 38 1mm pipe for propane Maximum length 200 61m Each 90 elbow equals 7 2 13m of pipe B Where permitted by local and national codes it is possible to convert ovens from natural to propane gas or from propane to natural gas Use the appropriate Middleby Gas Conversion Kit for the specific oven model Gas Conversion CAUTION The terms of the oven s warranty require all start ups conversions and service work to be performed by a Middleby Authorized Service Agent C PS520 Propane Conversion Two items have to be changed to change the oven to LP 1 Replace main orifices 2 Adjust main gas regulator per instructions below Disconnect the manifold union closest to the main burner and remove the manifold assembly four screws Slide out the mani fold assembly leaving the ignition and sense wires connected Replace the main orifices Replace the main orifices on the manifold assemblies with the LP units and replace the manifold assembly Reconnect the union D Adjusting the Maximum Pressure Setting 1 Disconnect pressure feedback connection if applicable
31. ent screw for minimum pressure setting clockwise to increase or counter clockwise to decrease pres sure until the desired minimum outlet pressure is obtained Check if main burner lights easily and reliable at minimum pressure Reconnect pressure feedback connection if appcable Close pressure tap screw Figure 2 15 Flexible Gas Hose Installation 1 2 gas Vibe tipple 3 4 1 2 gas pipe reducer 3 4 gas pipe nipple 1 2 gas Full Flow Gas Shutoff Valve Individual gas Flexible connection Quick Gas Hose disconnect for each oven device cavity SECTION 2 INSTALLATION Figure 2 16 Gas Burner Assembly Gas Burner Manifold Pressure Tap Figure 2 17 Burner Assembly 1 _ v Orifices Gas Burner Assembly Figure 2 18 Gas Valve Adjustment Screw 8 for maximum pressure setting Adjustment Screw 5 mm for minimum pressure setting F Checkout After any adjustment set appliance in operation and observe through a component cycle to ensure that burner system com ponents function correctly 16 G Maintenance Itis recommended to check yearly the minimum and the maximum setting and readjust them if necessary H Connection WARNING Some procedures in this section may require Y conversions readjustments or service on the oven s gas system Before performing these procedures check that the main gas supply valve and th
32. et temperature The temperature controller continuously monitors the oven temperature and turns on the modulating solid state relay controller The heat is on for the time required to maintain a constant oven temperature The temperature controller contains a low limit switch which allows the oven to cool down to 200 F 93 C before shutting off the blower A high limit indication ALM 1 will appear on the display if the oven reaches 650 F 343 C Door Safety Switch Conveyor Speed Digital Control Conveyor Speed Control Module Conveyor Drive Motor Figure 3 2 Interior View of Control Console 20 E Conveyor The on off switch for the conveyor motor is on the con trol panel Also on the control panel is the digital con veyor speed control The digital control can be adjusted from 1 10 min bake time conveyor speed Refer to Figure 3 3 Conveyor speed is measured by the amount of time ittakes for an item to go through the bake chamber of the oven MEASURING CONVEYOR SPEED See Figures 3 4 and 3 5 To check conveyor speed place a product item at the entrance end of baking chamber as shown Time how long it takes for the leading edge of the item to go from the entrance end of the baking chamber to the exit end This should be the conveyor speed shown on the con veyor speed digital control NOTE In Figures 3 4 and 3 5 the oven shown is with the conveyor running right to left WARNING
33. f oven insulation will occur 2 Do not use a caustic oven cleaner or the aluminized finger manifold surfaces will be severely damaged When cleaning your oven first remove all heavy debris with a vacuum cleaner Use a damp cloth for light clean ing For heavier cleaning of baked on grease and carbon deposits use a non caustic cleaner that will not react with the aluminized finger manifold surfaces SECTION 4 MAINTENANCE You can order non caustic cleaner from your local authorized Middleby Marshall Parts Distributor in the quantities listed Part Quantity 27170 0244 Case of Quarts 6 27170 0246 Case of Gallons 4 A Removing Conveyor From Oven For Cleaning Remove entry and exit trays Loosen donotremove two screws on housing guard Remove motor housing guard Lift conveyor and remove chain a woh Lift other side of conveyor and push toward other side Removable Air Fingers inside baking chamber Console Controls Temperaturer Controller Conveyor Speed Control Conveyor Motor Inside Motor Housing Guard Removable Crumb Pan Removable Conveyor Assembly Legs Blower and Cooling Fan Motor Adjustable Eyebrow Figure 4 3 SECTION 4 MAINTENANCE 6 Remove conveyor as shown Figure 4 6 Figure 4 4 Figure 4 7 Figure 4 5
34. ge STEP BY STEP 22 A Startup 22 Daily siaaa 22 Power 22 B Shutdown Procedure 1 22 IV NORMAL OPERATION 24 A Daily Startup 24 B Daily Shutdown Procedure 24 V QUICK REFERENCE TROUBLESHOOTING 26 SECTION 4 MAINTENANCE 1 MAINTENANCE DAILY eren 28 A ExteriOr iii iioii riise cii piegi sra aiaiai 28 B Cooling enne 28 C Conveyor Belt ee 28 D Crumb Pans nnne tnnt 28 MAINTENANCE MONTHLY 29 A Removing Conveyor From Oven For Cleaning 29 B Air Fingers Disassembly For Cleaning 31 C Reassembly of Air Fingers 32 D Reinstall End Plugs eren 35 E Conveyor Reassembly Into Oven 36 Checking Conveyor Belt
35. he Natural Gas Installation Code CAN CGA B149 1 or the Propane Gas Installation Code CAN CGA B1 49 2 as applicable Installed ovens must be electrically grounded in accordance with local codes or in the absence of local codes with the Canadian Electrical Code CSA C22 2 NOTE In Australia the oven installation must conform with any requirements of the appropriate statutory authority Gas oven installtions must conform with AGA Codes AG311 and AG601 NOTE In CE countries all aspects of the gas supply connection must comply with current IEC CEE requirements and with all applicable local national and international codes In addition four casters are provided to allow the oven to be more easily moved to the installation location These casters are intended to simplify pre installation move ment only and are NOT suitable for use as part of a CE oven installation During the installation procedure the casters MUST be removed so that the oven can be supported by the supplied 152mm adjustable legs 7 SECTION 2 INSTALLATION NOTE The oven when installed must be electrically grounded in accordance with local codes or in the ab sence of local codes with the National Electrical Code or ANSI NFPA70 NOTE There must be adequate clearance between the oven and any adjacent combustible con struction Clearance must also be provided for servicing and for operation CAUTION Itis recommended thatthe oven be placed under
36. ion manual provided to Buyer Seller does not guarantee the process of manufacture by Buyer or the quality of product to be produced by the equipment supplied hereunder and Seller shall not be liable for any prospective or lost profits of Buyer THE FOREGOING WARRANTY IS EXCLUSIVE AND IN LIEU OF ALL OTHER EXPRESS AND IMPLIED WARRANTIES WHATSO EVER SPECIFICALLY THERE ARE NO IMPLIED WARRANTIES OF MERCHANTABILITY OR OF FITNESS FOR A PARTICULAR PURPOSE The foregoing shall be Seller s sole and exclusive obligation and Buyer s sole and exclusive remedy for any action whether in breach of contract or negligence In no event shall seller be liable for a sum in excess of the purchase price of the item The Middleby Marshall logo is a registered trademark of Middleby Marshall A Middleby Company Middleby Marshall Inc 1400 Toastmaster Drive Elgin Illinois 60120 9272 U S A 847 741 3300 FAX 847 741 4406 TABLE OF CONTENTS Page SECTION 1 1 MODEL IDENTIFICATION eere 1 SERIES PS520 GAS SPECIFICATIONS 2 COMPONENT FUNCTION eere 4 A Conveyor Motor and Conveyor Belt 4 B Blower Fan 4 C Gas Burner esee 4 D Cooling Fan 4 E Air Fingers and Blank Plates See Figure 1 9 4 SECTION 2 Ie UNLOADING 8 PARTS L
37. ler Speed Control iddieby arshall J WA Removable Removable End Plugs Conveyor Assembly Removable Legs Crumb Pan Figure 1 4 PS520 Series Oven Components Locations SECTION 1 DESCRIPTION Il COMPONENT FUNCTION A Conveyor Motor and Conveyor Belt The conveyor belt is driven by a variable speed electric motor Figure 1 5 operating through a gear reducer The motor speed is controlled by a digital control The stainless steel wire belt can travel in either direction at variable rates ranging from 3 minutes to 30 minutes this is the time that a product cantake to pass through the oven B Blower Fan The blower fans are located at the rear of the oven These blowers force heated air through the air fingers The BLOWER switch must be set to ON or I for oven warmup and baking C Gas Burner The gas burner is located inside the rear panel and is controlled by the temperature controller D Cooling Fan See Figure 1 5 and Figure 1 6 The cooling fan is located in the back of the oven The cooling fan draws air through its grille blowing it through the blower motor compartment and the control compartments into the oven top and exhausted out the front louvers E Air Fingers and Blank Plates See Figure 1 7 E1 Air Fingers An Air Finger Assembly is made up of three parts 1 Outer Plate The Outer Plate is the removable cover ing with tapered holes which di
38. lla YE 292 rnm 1 TENVd H1 TBNYd ova HY S1 251 LSI 43 WARNING Improper installation adjustment alteration service or maintenance can cause property damage injury or death Read the installation operating and maintenance instructions thoroughly before installing or servicing this equipment NOTICE During the warranty period ALL parts replacement and servicing should be performed by your Middleby Marshall Authorized Service Agent Service that is performed by parties other than your Middleby Marshall Authorized Service Agent may void your warranty NOTICE Using any parts other than genuine Middleby Marshall factory manufactured parts relieves the manufacturer of all warranty and liability NOTICE Middleby Marshall reserves the right to change specifications at any time CFESA Commercial Food Equipment Service Association Middleby is proud to support the Commercial Food Equipment Service Association CFESA We recognize and applaud CFESA s ongoing efforts to improve the quality of technical service in the industry Middleby Cooking Systems Group 1400 Toastmaster Drive Elgin IL 60120 USA 847 741 3300 FAX 847 741 4406 www middleby com yz Middleby 7728 Marshall THE MIDDLEBY CORPORATION
39. m strain relief fitting not furnished to enable safe access to the terminal block from which oven power is distributed The supply conductors must be of the size and material copper recommended to provide the current required refer to the data plate for the ampere specifications The electric current rating for each conductor supplying a PS520 Series Oven is 1 5A ELECTRICAL INLET GAS INLET Figure 2 11 Junction Connection Box DOMESTIC PLATE V GAS SUPPLY CAUTION DURING PRESSURE TESTING NOTE THE FOLLOWING 1 The oven and its individual shutoff valve must be dis connected from the gas supply piping system during any pressure testing of that system at test pressure in excess of 1 2 psi 3 45 kPa 2 The oven must be isolated from the gas supply piping system by closing its individual manual shutoff valve dur ing any pressure testing of the gas supply piping system at test pressure equal to or less than 1 2 psi 3 45 kPa 3 If incoming pressure is over 14 W C 35mbar a sepa rate regulator MUST be installed in the line BEFORE the individual shutoff valve for the oven WARNING To prevent damage to the control valve regu lator during initial turn on of gas it is very important to open the manual shutoff valve very slowly Afterthe initial gas turn on the manual shutoff valve must remain open except during pressure testing as outlined in the above steps or when necessary during service maint
40. mum to 3 3 4 inch maximum in 1 2 inch increments 10 SECTION 2 INSTALLATION Figure 2 6 MODEL PS520 DOUBLE OVEN DIMENSIONS 36 64 931mm SO Middleby Marshall 32 67 830mm OVERALL 4 00 101 6mm 1 78 45mm 2 PLACES ELECTRICAL INLET 30 16 766mm INLET ELECTRICAL INLET 23 02 585mm 14 62 371mm GAS 7 47 190 i 2 PLACES The Opening Height is Adjustable from 2 1 4 inch mini mum to 3 3 4 inch maximum in 1 2 inch increments 2 P N 59927 is shown in its correct installed position 11 SECTION 2 INSTALLATION Figure 2 7 MODEL PS520 TRIPLE OVEN DIMENSIONS 1 Z7 Middieb m uu Marshall amp 8 22 1225 OVERALL 48 19 1224 03mm 38 19 970 03mm 575 06mm Y Y 7 09 180 09mm FRONT VIEW 178 45mm 3 PLACES ELECTRICAL INLET 1 GAS INLET ELECTRICAL 41 71 1 1059 43mm 34 57 878 08mm GAS INLET ELECTRICAL 26 16 664 46mm INLET 3 47 88 14mm 45mm 175 3 PLACES The Opening Height is Adjustable from 2 1 4 inch mini mum to 3 3 4 inch maximum in 1 2 inch increments 2 P N 59927 is shown in its correct installed position 12 SECTION 2 INSTALLATION UTILITY ROUGH IN DIMEN
41. nge of the finger manifold Figure 4 16 Extended Lip Tab on Outer Plate Flange of Finger Manifold Outer Plate Figure 4 17 33 SECTION 4 MAINTENANCE 5 Install fingers and blank plates correctly with edges interlocked and no space between edges Incorrect Too Much Space Top Finger Blank Plate Tab on Outer Plate of Finger Located in Groove Incorrect Too Top Finger Much Space Blank Plate Tab on Outer Plate of Finger Located in Groove Correct Edges Top Finger Overlap Com Blank Plate Tab on Outer Plate of Finger Located in Groove Figure 4 18 34 D Reinstall End Plugs 1 Reinstall lower end plug Be sure to tighten the wing screw on the end plug 2 Reinstall conveyor 3 Reinstall upper end plug Be sure to tighten two wing screws on the end plug SECTION 4 MAINTENANCE uem J 22 4 Figure 4 19 Removable Air Fingers inside baking chamber Console Controls Temperaturer Controller Conveyor Speed Control Conveyor Motor Inside Motor Housing Guard Removable Crumb Pan Removable Conveyor Assembly Figure 4 20 Legs 35 Blower and Cooling SECTION 4 MAINTENANCE E Conveyor Reassembly Into Oven 1 Lift conveyor and position it in oven as shown NOTE Conveyor may be inserted into either end of oven If it is to be installed from the non dri
42. nished in your installation kit to replace them Figure 4 24 2 Using long nose pliers unhook master links at left end of conveyor as shown in Figure 4 25 Figure 4 27 NOTE Before connecting the inside master links notice thatthese links have a correct position Figure 4 28 The link at the right is in the correct horns up position for inserting into the conveyor belt The horns facing down l Correct poe Position 7 Incorrect p Figure 4 25 Position 3 Remove the outside master links on the right and left sides of the conveyor belt as shown in Figure 4 26 are in the incorrect position Figure 4 28 Figure 4 26 37 SECTION 4 MAINTENANCE 6 Reconnect the inside master links Figure 4 29 Figure 4 29 NOTE The outside master links have right and left sides to them The right edge master link has an open hook facing you as shown in Figure 4 30 This will match up with the outer edges of the conveyor belt Remember this hook travels backwards on the conveyor Direction of travel Figure 4 30 7 Reconnect the outside master links 8 Replace all parts removed from the oven Figure 4 31 H Attaching Drive Chain 1 If drive sprocket assembly was removed reassemble it into the conveyor drive shaft Be sure flat on end of drive shaft aligns with set screw in conveyor shaft collar Once in place tighten 3 32 set screw
43. or AT LEAST FIVE MINUTES before restarting the oven Then repeat the Daily Startup procedure CAUTION In case of power failure turn all switches to the OFF O position and remove the product After the power has been restored perform the normal startup pro cedure IF THE OVEN WAS SWITCHED OFF FOR LESS THAN 5 MINUTES WAIT FORAT LEAST FIVE MINUTES BEFORE RESTARTING THE OVEN SP LOCK Light Lights when the set point is locked out from changes This setting can only be changed by service personnel OVERTEMP Light Lights when the oven temperature is greater than 650 F 343 C Refer to Quick Refer ence Troubleshoot ing in this section Temperature Key Press this key once to view the Actual Temperature in the Display Display Shows the Set Point or the Actual Tem perature in degrees Fahrenheit F or Celsius C HEAT ON Light Lights when the burner is in operation SECTION 3 OPERATION Unlock Key Press this key togeth er with the Set Point Key to allow the Set Point to be changed Changes can only be made for 60 seconds marshal Up Arrow and Down Arrow Keys Press these keys to adjust the Set Point up or down If the Set Point will not change refer to Set Point Key and Unlock Key in this section 25 SET PT set point Light Lights when the set point is shown in the display ACTUAL TEMP Light Lights when the Actual Temperature is shown in th
44. plate out andthen up Figure 4 11 7 The outer finger plate is stainless and may be cleaned by either soaking in a hot strong detergent solution or using a caustic cleaner The conveyor belt can also be cleaned in the same way Figure 4 12 Standard Lower Finger Figure 4 13 Standard Upper Finger C Reassembly of Air Fingers 1 Air fingers are made up of one inner plate one outer plate and the finger housing manifold Be sure to match up the markings T1 T2 etc on all the parts of the air fingers as you are reassembling Figure 4 14 2 Reassemble the inner plate Keep your fingers clear so you won t pinch them The inner plate of a finger will only go in one way because of its design 3 Replace the outer plate by placing your hands flat on the top of the plate and pushing down Keep your fingers clear so you won t pinch them Figure 4 15 SECTION 4 MAINTENANCE 4 Replace the air fingers by pushing in at the back side f Remember to replace them according to the numbers marked on them when they were removed They must go back in the same way they came out IMPORTANT When inserting fingers the tab on the outer plate must be in the groove as shown in Figure 4 18 There is a blocking tab on the outside ofthe groove which will prevent inserting the finger in the groove if the outer plate is moved away from the fla
45. ponents One oven can be cleaned or serviced while the others are operating Figure 1 3 Triple PS520 Oven SECTION 1 DESCRIPTION PS520 SERIES OVEN SPECIFICATIONS Conveyor Belt Width 18 00 457mm Heating Zone Length 20 00 5098mm Baking Area Square Feet 2 5 sq ft 0 23 sq m Overall Dimension Standard Single Oven w Legs 42 00 1067mm L x 35 21 894mm W x 21 10 536mm H x Overall Dimension Double Oven 42 00 1067mm L x 35 21 894mm W x 36 64 931mm H x Overall Dimension Triple Oven 42 00 1067mm L x 35 21 894mm W x 48 19 1224mm H x Weight of Single Oven 250 Ib 93 3kg Shipping Weight 325 Ib 121 3kg Shipping Cube 22 1 ft 0 62 m Operating Range 8 3 kW hr BTU s Natural or Propane Gas 40 000 BTU HR 42 MJ hr Gas Input Natural or Propane Gas 1 2 NPT 1 2 BS Maximum Operating Temperature 600 F 316 C Warm up Time 20 min Belt Speed Limits 1 10 minutes SERIES PS520 ELECTRICAL SPECIFICATIONS Main Blower amp Control Circuit Phase Frequency Amperage Poles Wires Elements Voltage Voltage praw 0 0 00 0 0 0 208 240V 208 240V 1 Ph 50 60 Hz 1 5 Amp 2 Pole 3 Wire 2 hot 1 grd GAS ORIFICE AND PRESSURE SPECIFICATIONS PER OVEN CAVITY DOMESTIC AND STANDARD EX PORT OVENS Orifice Manifold Gas Main Orifice LD P P Natural 0 082
46. r use a water hose or pressurized steam cleaning equipment when cleaning this oven NOTICE If the oven is to be removed from its installed location for servicing perform the following procedure Switch off the oven and allow it to cool Do NOT service the oven while it is warm Turn off main circuit breakers and disconnect con nector from oven Move oven to desired location for servicing When servicing is complete move oven to original location Adjust legs to level oven Connect electrical connectors to oven Turn on main circuit breakers Follow normal startup instructions 27 SECTION 4 MAINTENANCE MAINTENANCE DAILY A Exterior Everyday you should clean the outside of the oven with a soft cloth and mild detergent WARNING Never use a water hose or pressurized steam cleaning equipment when cleaning the oven B Cooling Fan 1 ONECOOLING FAN GRILLE AT THE REAR OF THE OVEN MUST BE CLEANED DAILY Clean grille with a stiff nylon type brush 2 Checkthe air intake of the cooling fan daily The best time to check is right after starting the oven IMPORTANT NOTE The cooling fan operates when the blower switch is turned to ON I It must operate to keep the electrical control cabinet below 140 F 60 C WARNING IF FAN BLADE IS NOT ROTATING BROKEN OR FAN ASSEMBLY IS MISSING FROM MAIN BLOWER MOTOR SHAFT DONOT OPERATE OVEN REPLACE COOLING FAN BLADE BEFORE OPERATIN
47. rect the air stream onto the product being baked 2 Inner Plate The perforated Inner Plate is vital in forming the unique air jets It must be assembled into the manifold with its holes aligned with the holes of the outer plate 3 Manifold The Manifold is the assembly which slides on tracks into the oven plenum Blower Motor Cooling Fan Blower Assembly Conveyor Drive Motor Right Control Box Figure 1 5 Machinery Compartment Components SECTION 1 DESCRIPTION 75 NPT Gas Input Cooling Fan Grille Gas Hose Figure 1 6 Cooling Fan SECTION 1 DESCRIPTION F2 Blank Plates 1 Blank Plates The Blank Plates are available to install on the plenum where an air finger is not required Outer Plated gt gt Inner Platen Blank Plated Finger 0 Manifold 0 Assembly Baffle Figure 1 7 Blank Plates two sizes and an Air Finger SECTION 2 SECTION 2 INSTALLATION INSTALLATION WARNING For gas ovens after any conversions readjustments or service work on the oven e Perform a gas leak test Test for correct air supply e Test for proper combustion and gas supply e Check that the ventilation system is in operation WARNING Keep the appliance area free and clear of combustibles WARNING The oven must be installed on an even level non flammable flooring and any adjacent walls must be non flammable Recommended
48. rocedure IMPORTANT NOTE The cooling fan operates when the BLOWER switch is turned ON or I It must operate to keep the control console below 140 F 60 C 3 Turnthe CONVEYOR switch Figure 3 6 to the or position This starts the conveyor belt moving through the oven Set the conveyor speed for the desired baking time Refer to the following Procedures E F and G 22 4 Set the temperature controller to the desired baking temperature NOTE For complete temperature controller operation instructions refer to Step C 5 Turn the HEAT switch Figure 3 6 to the ON or I position Wait for the Heat ON light to turn on 6 Ovenwill reach a baking temperature of 500 F 232 C in approximately 20 minutes Allow the oven to cycle for 30 minutes after it has reached desired bake temperature The oven is now ready for baking Power Failure In case of power failure turn off all switches and remove product After power has been reestablished follow normal startup procedure B Shutdown Procedure 1 Turn the BLOWER and HEAT switches to OFF or O NOTE The blowers will remain on until the oven tem perature cools down to 200 F 93 C at which time they will stop automatically 2 Make certain that there are no products left on the conveyor inside the oven Turn the CONVEYOR switch to OFF or SECTION 3 OPERATION fi TEMPERATURE 6
49. the circuit breaker fused disconnect is turned on Check that the BLOWER Switch is the I posi tion OF Turn the HEAT 2 BLOWER lt gt and CONVEYOR a o switches to the OFF position Wait for AT LEAST FIVE MINUTES before restarting the oven Repeat the Daily Startup procedure Check that the Set Point is correctly set Check that both the BLOWER lt gt and HEAT 22 Switches are in the I position 82 Ifthe oven still will not heat turn the HEAT 2 BLOWER and CONVEYOR a switches to the OFF posi tion Wait for AT LEAST FIVE MINUTES before restarting the oven Repeat the Daily Startup procedure Check that the Set Point is above 200 F 93 C Turn the oven to the OFF or O position and allow it to cool Disconnect electrical power to the oven Refer to Section 4 Maintenance for instructions on reassembling the air fingers Turn the oven to the OFF or O position and allow it to cool Disconnect electrical power to the oven Check if the conveyor is blocked by an object inside the oven Refer to Section 4 Maintenance for instructions on checking the conveyor and drive chain tension Check that the set temperature and bake time settings are cor rect IF THESE STEPS FAIL TO RESOLVE THE PROBLEM CONTACT YOUR LOCAL MIDDLEBY MARSHALL AUTHORIZED SERVICE AGENT A SERVICE AG
50. the oven with the BLOWER switch or any other oven control turned ON or I Turn OFF or and lockout or tagout all electric power to the oven before attempting to clean or service this oven 19 SECTION 3 OPERATION Il COMPONENT INFORMATION AND LOCATION Figures 3 1 and 3 2 A Door Safety Switch The Door Safety Switch is located at the lower right side of control panel opening Opening the control panel door permits this switch to open disconnecting power to all electrical controls CAUTION Do NOT touch the wires going to this safety switch Current is always present B Blower Switch The blower switch has two positions The switch must be ON or I for the main blowers to come on and permit the oven to run The fan circulates the air throughout the oven and must stay on during baking and during the cool down cycle above 200 F 93 C to prevent blower bearing damage To protect the blower motor and bear ings a thermostatic override is built into the oven If the temperature inside the oven is over 180 F 82 C the Temperature Controller main blower will continue to run after the blower switch is turned to the OFF or O position C Heat Switch The Heat Switch allows the burner to activate Activation is determined by the settings on the Digital Temperature Controller D Temperature Controller The temperature controller is a solid state PID type to maintain the operator s
51. ve end of the oven the drive sprocket assembly must be removed as shown in conveyor disassembly section Figure 4 21 2 Reinstall the conveyor extension Conveyor Extension Figure 4 22 36 F Checking Conveyor Belt Tension WARNING Oven conveyor belt must be cool when adjusting belt Do not adjust belt if HOT 1 With the conveyor assembly in the oven stand at one end of conveyor and check tension by lifting the conveyor belt at the center of the oven chamber opening The belt should not lift higher that 1 to 2 75mm to 102mm 2 If conveyor belt is still not under proper tension an entire link must be removed Use the following procedure H Conveyor Belt Link Removal to remove a link If conveyor belt is under proper tension proceed directly to J Attaching Drive Chain Figure 4 23 SECTION 4 MAINTENANCE G Conveyor Belt Link Removal 4 Unhook the link to be removed 1 Using long nose pliers an entire link can be removed 5 Pull up on the belt link section and remove Do not with the conveyor assembly either in or out of the oven discard the link removed as it may be used for making Position master links at end of conveyor as shown in spare master links Figure 4 24 NOTE If a section of the conveyor belt is being replaced it should be done now Remove the links that need re placing and use the section of conveyor belt fur
52. where unless the product is purchased through Middleby International with warranty included The foregoing warranty is exclusive and in lieu of all other warranties expressed or implied There are no implied warranties of merchantability or of fitness for a particular purpose The foregoing shall be Seller s sole and exclusive obliga tion and Buyer s sole and exclusive remedy for any action including breach of contract or negligence In no event shall Seller be liable for a sum in excess of the purchase price of the item Seller shall not be liable for any prospective or lost profits of Buyer This warranty is effective on Middleby Marshall equip ment sold on or after February 15 1995 2003 Middleby Marshall A Middleby Company Date d installation MIDDLEBY MARSHALL INC OVEN LIMITED WARRANTY Non U S A The Seller warrants equipment manufactured by it to be free from defects in material and workmanship for which it is responsible The Seller s obligation underthis warranty shall be limited to replacing or repairing at Seller s option without charge F O B Seller s factory any part found to be defective and any labor and material expense incurred by Seller in repairing or replacing such part Such warranty is limited to a period of one year from date of original installation or 15 months from date of shipment from Seller s factory whichever is earlier provided that terms of payment have been fully met All labor sh
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