Middleby Marshall PS520 User's Manual
Contents
1. A NS To Oven 24 610m Suggested dimensions are shown utility code gt 7 requirements supersede any factors shown Figure 2 9 Typical PS520 Series Oven s Installation ELECTRICAL RATING 7 6 9 2 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 service 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 STALLED OR WARRANTY WILL BE VOID Il VENTILATION GUIDELINES A mechanically driven ventilation system is recommended for the PS520 Series Middleby Marshall conveyorized electric 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 re member these are recommendations or guidelines you may have a special condition or problem that will require the services of a ventilation engineer or specialist Proper ventilation is the oven owner s responsibility Improper ventilation can inhibit oven performance Please Note There now two stand off Channels thatmustbeinstalledinthefield SeeSection6 PARTSLIST page 44 45 for reference Item 52. Conveyor Sigo Middleby le hi Marshall 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 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 15 SECTION 3 OPERATION 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 forthe main blowers to come on and permit the ovento run Thefan circulatesthe airthroughoutthe 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 bearings a thermostatic override is built into the oven Temperature Controller lf the temperature inside the oven is over 180 F 82 C the main blower will continue to run after the blower switch is turned to the OFF
3. Figure 1 3 Triple PS520 Oven SECTION 1 DESCRIPTION Conveyor Belt Width Heating Zone Length Baking Area Square Feet Overall Dimension Standard Single Oven w Legs Overall Dimension Double Oven Overall Dimension Triple Oven Weight of Single Oven Shipping Weight Shipping Cube Operating Range PS520 SERIES OVEN SPECIFICATIONS Maximum Operating Temperature Warm up Time Belt Speed Limits Main Blower amp Elements Voltage 208 240V 380V Export 480V SERIES PS520 ELECTRICAL SPECIFICATIONS Control Circuit Voltage 208 240V 208 240V 208 240V 18 00 457mm 20 00 5098mm 2 5 sq ft 0 23 sq 42 00 1067mm L x 35 21 894mm W x 21 72 786mm H x 42 00 1067mm L x 35 21 894mm W x 37 27 947mm H x 42 00 1067mm L x 35 21 894mm W x 52 82 1342mm H x 250 Ib 93 3kg 325 Ib 121 3kg 22 1 ft 0 62 m 8 3 kW hr 550 F 287 C 20 min 1 10 minutes Phase Frequency Amperage Draw 1 Ph 50 60 Hz 39 9 Amp HEATER AMPERAGE Voltage kW Amp 208 8 3 39 9 230 7 6 33 0 240 8 3 34 6 1 Ph 50 60 Hz 21 8 Amp HEATER AMPERAGE Voltage kW Amp 380 8 3 21 8 400 9 2 23 0 1 Ph 50 60 Hz 17 3 Amp HEATER AMPERAGE Voltage kW Amp 480 8 3 17 3 NOTE Wiring Diagrams are contained in Section 7 of this Manual and are also located inside the oven at the bottom of the Control Panel This Manual Must Be Kept For Future Reference Poles
4. 0295 1 09 09 0823 AN3N3713 01 01 89 O O HOLIMS 1V3H 3r UJ 61 v 22 VAOOZ AHVONOO3S ZH 09 08 0 2 AHVIWIHd LEERE HOLIMS 86 ex LH e H3TIOHLNOO 9 S C O O O 206 Ole 7 LX YH HOLIMS LS mn NI 0 H3MO1 bz YOLOW IHM H3MO18 002 SL O 69 SONILL3S HOLIMS m gt 09 8 NIVIA 26 uaddn SNI1009 HOLON 21 Oc L WOO S LON L WOO L ON 8 9 Y WOO Z WOO ZWOO ve zgo 713NVd H1 xovg TaNvd HH esq 251 LSI 52 SECTION 7 ELECTRICAL SCHEMATICS 0 YOLNNASIC OOLLWWOLNY SH3 LIVHOSNN3HL unaloNorsia ve 280 9 9 30 HOLOW 7070 Y SHOLOW HOLOWWOY LSHAYG 99 HOLOW HOLON ANO9 2G OMAN ZIHVMHOS Me SO1Od O13N9VW NOd Y 313NDVN 13NOVMW H39r10d p 53109 3ulvno v INVVIV 13NOVW HOSN3S A Wed vN3Qv9 HOLOW SHO1vIHOdSVHL 130 SHOLOW OLNNIN TV 1419 VS3HAIE SHOLOWGNVELOdSNVUL 530 31nNIW unalodsNvu UN3LOW un3loW 3Wio3u 3siuid3u NADIA HOLON ANOD Qvai90 HA 1OHLNOO VLIOO I3A 3TIOHLNOMSLISMOIQNIMHOS3O 3
5. YOLNAASIO OQUIINOZI VAS vell OOIIVAOI V oavi VULSINIS 3940 81504 SH3LIVHOSNN3MIL YALSINIS 31195 IANN N3INIH ANALDNOFSIA A109 3109 ve gO 1331 e sl avid OLNSINVIUINIIIQ IOQV ILIN3A OLN3IAIVQQ32 H3V ld Id 3 OLV UNA Osso 108 3onou oR quo 3 V 1839 IHfPl YNIVWILINGA WOOD OG HInizi OdV1 VALSINIS 1093135 IANT 3109 Odil VIddODONWYWI1YIIANIONY3HL OIN3IA3TH IIN3IN313 INN INN 5144 1OVINOO col ONUOH 130 OQV IlIN3A YOLANYYJINI 130 VIOIN3A o VIVO RIOUNYYNI 5 Y3LIVHOS LIM 5 30 INNVA eInaldnelelalNI HOLMS v O 202 0124 102 00 NO WSL NNO Quo RL GONVS Quo OONVIS SSI3 ONVI8 IHM NOHISOd3U ONIISI 10 L OULdd AGSOLINDUID IG 329v ld OSOSISIOLINV VOJHOS cO L 3OVWULIJ3Q 1317 Eu zz E 8 21 3 coL 6 ON WOO OQY3INSZI oavi id 10 FQUIA TVdIO NRId 31135 1HO38 31135 ZA IQ 31dIONRId
6. 4 B Blower Ann 4 SECTION 4 MAINTENANCE C Electric O LC 4 MAINTENANCE DAILY 24 D Cooling 4 EXIGHOE e o s 24 E Air Fingers and Blank Plates See Figure 1 9 4 BCO NIF 24 SECTION 2 C Conveyor Belt san 24 L UNEOADIN con 7 D Crumb Pans 24 PS520 OVEN INSTALLATION MAINTENANCE MONTHLY 25 REQUIRED KITS AND EQUIPMENT 8 A Removing Conveyor From Oven For Cleaning TRO 25 PARTS LIST FOR SERIES PS520 ELECTRIC OVEN B Air Fingers Disassembly For Cleaning 27 INSTALLATION KIT 8 C Reassembly of Air Fingers EN 28 UTILITY ROUGH IN DIMENSIONS AND POSITIONING D Reinstall End Plugs 31 FOR PS520 SERIES OVENS 12 E Conveyor Reassembly Into Oven 32 CIRCUIT BREAKER 12 F Checking Conveyor Belt Tension 32 ELECTRICAL SPECIFICATIONS 12 Conveyor Belt Link Removal 33 ELECTRICAL RATING eene 12 Attaching Drive Chain 34 SUPPLY WIRE ainia aid 12 MAINTENANCE
7. 3109 3HONVI 3109 19 3thi3 3IIONRId ANNONS NIVIA 54 SECTION 7 ELECTRICAL SCHEMATICS NOTES 55 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 otherthan your Middleby Marshall Authorized Service Agent may void your warranty NOTICE Using any parts otherthan 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 Commercial Food Equipment Service Association Middleby is proud to supportthe 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 Wirt THE MIDDLEBY CORPORATION
8. These Channel brackets are installed in the vertical plane using existing screws Item 6 to support these Channels usingthe upper andlower Key Hole openings in the C Channels The C Channels are identical and once installed will allow ample amounts of airthrough the cooling fan mounted on the rear side of the ovem by keeping the oven away from the rear wall If you have any questions about how to mount these two Channel brackets kindly phone Middleby Technical Services at 847 741 3300 Press 3 then 5 for Technical Support II ELECTRICAL CONNECTION INFORMATION FOR PS520 SERIES OVENS WARNING Authorized supplier personnel normally ac complish the connections for the ventilation system electric supply 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 C22 2 the Australian Code AG601 or other applicable regulations Middleby A 7724 Marshall MODELNO ___ vac jw H _ Jamps 0 WIRE SERVICE MOTORVOLTS
9. on 1 18 75 CONVEYOR BOTTOM VIEW 21 77 38 81 with STANDOFFS 26 75 FRONT LEGS 1 1 17 50 27 42 24 OVERALL The Opening Height is Adjustable from 2 1 4 inch minimum to 3 3 4 inch maximum in 1 2 inch increments SECTION 2 INSTALLATION Figure 2 6 MODEL PS520 DOUBLE OVEN DIMENSIONS 37 27 32 64 OVERALL 27 27 CONVEYOR 11 72 CONVEYOR 1 1 2 INCH ADJUSTABLE LEG 42 00 CONVEYOR 20 05 CAVITY 11 82 EXTENTION 21 77 38 81 5 82 18 75 CONVEYOR TO CENTER with STANDOFFS 26 75 FRONT LEGS 17 50 TO CENTER 42 24 OVERALL 1 The Opening Height is Adjustable from 2 1 4 inch minimum to 3 3 4 inch maximum in 1 2 inch increments 10 SECTION 2 INSTALLATION Figure 2 7 MODEL 520 TRIPLE OVEN DIMENSIONS 2 70 ELECTRICAL 48 19 48 82 OVERALL FRONT VIEW Y 5 82 11 82 EXTENTION 42 00 CONVEYOR EXTENTION 18 75 CONVEYOR MN 21 77 38 81 CENTER with STANDOFFS 26 75 FRONT LEGS 2 01 72 1 1 17 50 42 24 OVERALL The Opening Height is Adjustable from 2 1 4 inch minimum to 3 3 4 inch maximum in 1 2 inch increments 11 SECTION 2 INSTALLATION UTILITY ROUGH IN DIMENSIONS 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
10. 2 Pole 3 Pole 3 Pole Wires 3 Wire 2 hot 1 grd 4 Wire 2 hot 1neut 1 grd 4 Wire 2 hot 1neut 1 grd SECTION 1 DESCRIPTION Console Temperature Controls Controller dleby shall Removable End Plugs Legs Removable Crumb Pan Removable Conveyor Assembly Figure 1 4 PS520 Series Oven Components Locations SECTION 1 DESCRIPTION Il COMPONENT FUNCTION Figure 1 4 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 stain less steel wire belt cantravelin either direction at variable rates ranging from 3 minutes to 30 minutes this is the time that a product can take to pass through the oven B Blower Fan The blower fans are located 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 Electric Heaters There is one heater element mounted on the inside of the rear panel The element is connected to an electrical control which is energized 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 t
11. EVERY 3 MONTHS 35 SUGGESTED En 12 Electrical Terminals 35 VENTILATION GUIDELINES 12 B 35 ELECTRICAL CONNECTION INFORMATION FOR IV MAINTENANCE EVERY 6 MONTHS 35 PS520 SERIES OVENS 13 PS520 SERIES ELECTRIC OVEN KEY SPARE IV ELECTRIC SUPPLY FOR ELECTRIC HEATED PARTS cocoa 36 OVENS cues 12 KEY SPARE PARTS 36 SECTION 3 INSTALLATION SECTION 5 TROUBLESHOOTING CONTROL FUNCTIONS rennen 15 Troubleshooting Charts 37 COMPONENT INFORMATION AND LOCATION 16 SECTION 6 PARTS LIST A Door Safety Switch 16 SINGLE OVEN EXPLODED VIEW 41 B Blower Switch esses 16 RELAY PANEL sume educ in Gades 43 C Heat SWITCH 16 BLOWER ASSEMBLY 45 D Temperature Controller 16 CONTROL PANEL niic andes 47 E CONV Oia 17 SINGLE CONVEYOR 49 MEASURING CONVEYOR SPEED 17 SECTION 7 ELECTRICAL SCHEMATICS
12. PS520 Series Electric Ovens English Middleby O 7774 Marshall AMIDDLEBYCOMPANY owner s operating amp installation PS520 Series OVENS Model PS520E PS520 Single aer II SS Ss RUNS s ug PS520 Double Part No 52358 2003 Middleby Marshall Inc Price 30 00 P 08 08 Rev B 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 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 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 LOCA
13. 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 exitend This should be the conveyor speed shown on the conveyor speed digital control NOTE In Figures 3 4 and 3 5 the oven shown is with the conveyor running right to left Minutes Seconds Figure 3 3 Conveyor Speed Digital Control WARNING ES 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 O and lockout or tagout all electrical power to the oven before attempting to clean or service this oven chamber BEGINNING OF TIMING g E Figure 3 5 Product at exit end of baking chamber END OF TIMING 17 Figure 3 4 Product at entrance end of baking SECTION 3 OPERATION WARNING OVEN MUST BE KEPT CLEAR OF COMBUSTIBLES AT ALL TIMES STEP BY STEP OPERATION A Startup Procedures Daily Startup 1 Turnthe BLOWER switch Figure 3 6 to the ON or I position This starts the main blower fan and the cooling fans The blower circulates airthrough 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
14. or O position C Heat Switch Turning the HEAT switch to ON or I will energize the electric heating system This switch is in series with the blower fan motor and high temperature override switch Both switches must be closed before the heating elements an be energized D Temperature Controller The temperature controller is a solid state PID type to maintain the operator set temperature The temperature controller continuously monitors the oven temperature and turns on the modulating solid state relay controller The heatisonforthe time requiredto 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 16 SECTION 3 OPERATION E Conveyor The on off switch for the conveyor motor is on the control panel Also on the control panel is the digital conveyor 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 it takes for an item to go through the bake chamber of the oven MEASURING CONVEYOR SPEED See Figures 3 4 and 3 5
15. 81 d3 1 1437 H31S VIN 09004 92 X 81 ILS NLS 17139 9 17139 SHIM 13ADOYAS 01 G LIVHS 80p1S SAIC LHVHS GLOW LL8vIN 2 LN3INQT3M 787 NOlLdIHOS3G ON LHVd ALO HOA3ANOO 319NIS 49 SECTION 6 PARTS LIST NOTES 50 SECTION 7 ELECTRICAL SCHEMATICS SECTION 7 ELECTRICAL SCHEMATICS L3NDVN 4 YOLOW JINGON AV 1dSIG qaads UFTIOULNOI HOA3ANOO ex IS MS ANOO SONILLAS HOLIMS 02654 1 09 05 02 8023 VA003 A0ZL AYWANOIIS ZH 09 09 082 0 AHVNIHd LHINAX 0c ego U HOLIMS HOLIMS H3MO 18 HOLOVLNOO 99 H1 651 87 24 L WOO WOO 01 quo 22 UFTIOYHLNOI SYN IWHAdW3L S LON 9 H3MO T HOLOIN 09 Nv gddn 9NI1009 HOLOW A u5 IHM L WOO WOO TANVd MOVE 251 LON g ON 202 WOO HH LSI HOLIMS IHM quo HOLOVLINOO IN3IWGT3 Ole LOZ 00 NIVIA 51 SECTION 7 ELECTRICAL SCHEMATICS v Od 280 31Od r 4 OLON AV1dSIG qaads HJTIOHINOO
16. AMPS ADDITIONALLOADVOLTS AwPS TOTAL LOAD VOLTS AMPS PS5XX DO NOT INSTALL CLOSER THAN LJ INCHES TO NON COMBUSTABLE BACK WALL AND LJ INCHES TO NONCOMBUSTIBEL SIDE WALLS ONLY PS2XX FOR INSTALLATION ON COMBUSTIBLE FLOORS ADJECENT TO COMBUSTIBLE WALLS WITH THE FOLLOWING MINIMUM CLEARENCES L INCHES RIGHT SIDE WALL L INCHES TO LEFT SIDE WALL INCHES TO BACK WALL N INSTALLEZ PAS MOINS DECI PO D UN PANNEAU ARRI RE INCOMBUSTIBLE ET DE PANNEAUX LAT RAUX INCOMBUSTIBLES UNIQUEMENT DESTIN A UN USAGE AUTRE QUE DOMESTIQUE INTENDED FOR OTHER THAN HOUSEHOLD USE O SERALNO O 44957 REV D ELGIN ILLINOIS 60120 U S A Figure 2 10 Typical Electric Oven Data Plate 13 SECTION 2 INSTALLATION 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 electrical code requirements Copper is the recom mended material for the electrical supply conductors IV ELECTRIC SUPPLY FOR ELECTRICALLY HEATED OVENS Power requirements for electrically heated ovens are usually 208 240VAC 1 phase 3 wire 2 hot 1 ground although ovens built for export can have power require ments of 380VAC and 480VAC These ovens have 4 wire system A 1 5 38mm dia
17. Figure 4 3 SECTION 4 MAINTENANCE 5 Liftother side of conveyor and push toward other side 6 Remove conveyor as shown Figure 4 6 zm A J AAA SS Figure 4 5 Figure 4 7 CAUTION Be careful not to bump the drive sprocket while handling the conveyor to avoid damaging the drive shaft B Air Fingers Disassembly For Cleaning 26 SECTION 4 MAINTENANCE 1 Astheairfingers are removed use afelt 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 mark that plate also Fingers are marked in the order shown as viewedfromthe 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 9 50 4 Withairfingers 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 8 3 Remove air fingers NOTE Some oven users require a custom finger arrange ment 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 IQ
18. II STEP BY STEP OPERATION 18 Wiring Diagram E208 240V 50 60 1 PS520 51 A Startup Procedures 18 Wiring Diagram E380 480V 50 60 1 PS520 52 Daily Startup A qa aa sak ss 18 Wiring Diagram E230 240V CE 5520 18205 53 Power Fallure Esel 18 Wiring Diagram E380 400V CE 5520 18205 54 B Shutdown Procedure 18 NOTE Wiring Diagrams are in Section 7 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 A single PS520 Series Oven Figure 1 1 mounted on 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 On a double or triple oven the ovens operate indepen dently All ovens use identical controls and components One oven can be cleaned or serviced while the others are operating iddleby arshall
19. Remove the airfingers pullthe finger at the back side pull straight out Figure 4 10 27 SECTION 4 MAINTENANCE 6 Toremovethe inner plate pullthe plate out and then up 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 T3 etc on all the parts of the air T PON fingers as you are reassembling 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 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 12 Standard Lower Finger 2 gt Figure 4 15 Figure 4 13 Standard Upper Finger 28 SECTION 4 MAINTENANCE 4 Replace the air fingers by pushing in at the back side Hemember 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 Thereisablockingtab onthe outside o
20. LIST FOR SERIES PS520 ELECTRIC OVEN INSTALLATION KIT Single and Double Stack Ovens P N 48397 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 52358 OWNER S OPERATING amp INSTALLATION MANUAL m PARTS LIST FOR SERIES PS520 ELECTRIC OVEN INSTALLATION KIT Triple Stack Oven P N 54593 ITEM NO QTY PART NO DESCRIPTION 1 2 48392 INSULATION BOTTOM TRAY 2 1 48394 BOTTOM TRAY WELDMENT 3 1 48396 TOP COVER 4 4 51387 SCREW MSSLT THREAD 8 32 x 1 2 18 8 5 4 M3828 PIN ALIGNMENT 6 1 52358 OWNER S OPERATING amp INSTALLATION MANUAL Figure 2 1 PS520 Series Electric Oven Installation Parts 8 SECTION 2 INSTALLATION Figure 2 5 MODEL PS520 SINGLE OVEN DIMENSIONS 270 zl ELECTRICAL INLET 16 Fun 17 10 TZ Middleby 7 LZ Marshall OVERAL ages 21 72 TO ea 15 40 11 72 9 CONVEYOR 1 1 2 INCH FRONT VIEW ADJUSTABLE LEG x i BACK VIEW 5 82 11 82 EXTENTION E 42 00 CONVEYOR mi 20 05 CAVITY
21. 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 50 Amp circuit breaker for 208 240V or 30 Amp circuit breaker for 380 480V ELECTRICAL SPECIFICATIONS DOMESTIC 208V main blower motors and elements 1 Ph 39 9 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 240V main blower motors and elements 1 Ph 34 6 Amp draw 50 60 Hz 208 240V control circuit 2 pole 3 wire system per oven 2 hot 1 grd 230V main blower motors and elements 1 Ph 33 0 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 EXPORT 380V elements 1 Ph 23 0 Amp draw 50 60 Hz 208 240V control circuit and main blower motor 4 pole 4 wire system per oven 2 hot 1 neutral 1 grd 400V elements 1 Ph 21 8 Amp draw 50 60 Hz 208 240V control circuit and main blower motor 4 pole 4 wire system per oven 2 hot 1 neutral 1 grd Do NOT use conduit for ground or EXPORT 480V elements 1 Ph 17 3 Amp draw 50 60 Hz 208 240V control circuitand main blower motor 2 pole 4 wire system per oven 2 hot 1 neutral 1 grd Do NOT use conduit for ground 12
22. 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 ETM LAN r AN SSS MIA Direction of travel 2 1 0 Ra Figure 4 32 7X 3 The angle plate located on the underside of the a veyor must be against the lower end plug This is true on 2 2 both sides of oven Figure 4 30 7 Reconnect the outside master links 8 Replace all parts removed from the oven Crumb Pan Mounting Bracket Lower End Plug Figure 4 33 Figure 4 31 34 4 Reattach conveyor guard to control panel and secure two screws Install both upper end plugs Figure 4 34 Ill MAINTENANCE EVERY 3 MONTHS WARNING Shut OFF all electrical power and lock tag out the switch before attempting maintenance work NOTE It is recommended that the 3 month mainte nance be performed by an authorized Middleby Marshall technician 35 SECTION 4 MAINTENANCE A Electrical Terminals Open the control cabinet door by removing the three 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 35 B Ventilation Check that the air circulation throughout the oven is not blocked and is working properly IV MAINTENANCE EVERY 6 MONTHS A Ch
23. shown in Figure 4 25 Figure 4 25 SECTION 4 MAINTENANCE 4 Unhook the link to be removed 5 Pull up on the belt link section and remove Do not discard the link removed as it may be used for making spare master links NOTE If a section of the conveyor belt is being replaced it should be done now Remove the links that need replacing and use the section of conveyor belt furnished your installation kit to replace them 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 hornsfacing down are in the incorrect position Correct pP d Position pu Incorrect Position 3 Remove the outside master links on the right and left sides of the conveyor belt as shown in Figure 4 26 Figure 4 26 Figure 4 28 33 SECTION 4 MAINTENANCE H Attaching Drive Chain 6 Reconnect the inside master links Figure 4 29 1 Ifdrive sprocket assembly was removed reassemble into the conveyor drive shaft Be sure flat on end of drive shaft aligns with set screw conveyor shaft collar Once in place tighten 3 32 set screw 2 Lift conveyor and install drive chain to conveyor drive sprocket and motor sprocket O 7 D Figure 4 29 NOTE The outside master links have right and left sides to them The right
24. when blower switch see Figure 3 6 isturned ON or I The cooling fans cool the control components and blower motor The cooling fans located atthe 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 procedure IMPORTANT NOTE The cooling fan operates when the BLOWER switch is turned ON I Itmustoperate to keep the control console below 140 F 60 C Turnthe CONVEYOR switch Figure 3 6 to the ON or P 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 18 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 P position This completes a circuit to supply electric power to the electric heating system 6 Oven will 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 temperatue 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
25. 45 SECTION 6 PARTS LIST 0 1X0S 3 FIANOIOWHFHL G 218 91 VE 0 AOrZ LINOYIO H3MVaua GE98p Ve AO LINOYIO H3MVa3ua 9606 ON3A TON NOLLNIHSNA HOLIMS GVLGE el dN MOld HOA3ANOO LIA 29109 21 JAIHd HOA3ANOO HOLOW 00989 LE LIINIT IH OIH LO3 T3 28622 01 dZON VOL HOLIMS 1700 12082 6 6 021 4 062 YINYOJSNVEL 0616 8 0 2 802 HOLOV LNOO 100 1708 15 VINOZ v OgINOO 1OH LNOO 06609 9 VINO AV1dSIG 1OH LNOO 5 IVLIDIO 20872 G Q33dS 1VLIOIQ M 1OH LNOO Q33dS HOA3ANOO 27409 p HOLIMS HOL9313S 969rr 190719 LOVLNOO 16977 2 L 7697 1 SNIVLNOO HOLIMS H3MO 18 LIM 269 2 NOLLdIHOSIO ON LHVd AMO TANVd 1OHINOO 47 SECTION 6 SECTION 6 PARTS LIST 16 Q3ddlHS 1 2 Nvd 60p1S 2 61 giNnuo NVd 2 81 HOA3JANOO NOISN31X3 96214 21 9 HOA3ANOO NOISN31X3 16219 91 saHsnug 69108 dN MOld HOA3ANOO LIA 29109 JAIHd HOA3ANOO HOLOW 00989 el HO ON 3409 91 6 52892 L340O0HdS LAVHS HOA3ANOO 2 1 102 52 LIADOYAS 11299 LE ANI SZ 99666 901 NIVHO S2 ANI 2121016 vol 033dS NIVHO ASSY 19999 01 8L 2 L LHOIH H31SVIN 19009 6 81 d3 1 H3 1N39 H31SVIN ANIT 29004 8
26. EAST FIVE MINUTES before restarting the oven Repeat the Daily Startup procedure Check that the Set Point is correctly set Check that both the BLOWER db and HEAT 562 Switches are in the ON I position If the oven still will not heat turn the HEAT 322 BLOWER and CONVEYOR switches to the OFF O position 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 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 reassem bling the air fingers Turn the oven to the OFF or 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 correct IF THESE STEPSFAIL TORESOLVE THE PROBLEM CONTACT YOUR LOCAL MIDDLEBY MARSHALL AUTHORIZED SERVICE AGENT A SERVICE AGENCY DIRECTORY IS SUPPLIED WITH YOUR OVEN SECTION 4 MAINTENANCE SECTION 4 MAINTENANCE 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 disassemble clean or service
27. L 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 ON or 1 position Then start the oven If oven still will not start contact your Middleby Marshall Service Agency 37 SECTION 5 TROUBLESHOOTING NOTES 38 SECTION 6 PARTS LIST SECTION 6 PARTS LIST 39 SECTION 6 PARTS LIST 40 SECTION 6 PARTS LIST HO LON H3AOO ASSV 29827 91 ININ 31V 1d3INVN 6 VINO STIAON 072 802 ME dz 09 13SQHOO LIA 8 81 Z LXZE 8 115 SW HOS 78616 dOL H3JAOO 96687 21 A I8SW3SSV AVH LINOLLOS LE SdN 14 8061016 01 02 7 1 OILSWId DNIM LAN cSv9 9 6 5 SS v XvL ZL GHHSM MIYOS 6000 962 12 8 8 6 8 A18IN3SSV LIMOVYS ONILNNOW 91d 86614 ATINISSV HY MOHS3A3 01 8 9 55 Y3ddN MOHS3A3 8788 G 9 WALI SIANTINI ATINISSV 9NId HY 21 87 A1J8IN3SS
28. LON tL WOO 00 00 D 00 HOLNNASIG 8 9 OOLLWNOLNY S3HOLLOHHSLNI SH3LIVHOSNN3HL c ON g WOO c ON WOO YNILONOFSIA ve 280 oauainozi vuasvul oauainozi oavi oaagainozi VHISINIS IQ 1504 VELSINIS IQ VHLSINIS IQ 31I3S NALNIH 31138 3911 3109 3109 3109 1431 81 uvau 251 NOI3ISOd3H ONILSIHdIH ON vulsad IQ 31138 31HO3H 3109 NOY 13534 E SSI3M IHM WOO oauarnozi oav1 Vu 1SINIS IQ ALIAS JANT 3109 157 sol OLN3MN313 LLNSW3 T3 31N3W3 IN3N373 SSIV TdH 1OVLNOO AV Tat Ouid VOVId O8HOLSIALLNV H3LTIIHOHLSN3PINDH 39401430 lad HOLOVLNOD LOZ 003 Ole sol 9 33225 22522 50595 250 25952 2509 215 m gt 08 lt lt EM mD gt Mm m 2 mm D m z gt m 53 SECTION 7 ELECTRICAL SCHEMATICS al OL IQUJA NNAS DD YOLON O O V RIOLON SOIOIWIAOHLSHSUG AOLON ANOS OG YOLNNASIO OOIIVAOInV SIJIYOUNYYILNI SUINWHOSNNIYL YUNILONOFSIO VE 282 gt gt gt gt SEERES S amp 2 20 TREE
29. PA70 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 It is recommended that the oven be placed under 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 CAUTION On ovens with the Machinery Drive Compartment located at the right end a minimum clearance of 0 to a left side wall 18 to a right side wall and 6 from a back wall to air openings at the rear of the oven must be maintained For servicing and cleaning a minimum of 18 clearance from all walls is recommended 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 The crate and carton must be examined before signing the 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 initiated by the consignee within 10 days from the date that the shipment is received SECTION 2 INSTALLATION PARTS
30. PERATION V QUICK REFERENCE TROUBLESHOOTING SYMPTOM lt lt OVERTEMP light is lit food product is undercooked Oven will not turn on at all appears in display oven is not heating Oven will not heat Oven is operating but little or no air is blowing from air fingers Conveyor moves with a Jerky motion or will not move at all Food products are overcooked or undercooked PROBLEM The oven temperature ex ceeded 650 F 343 C and the burner was automati cally shut down Electrical power may not be reaching the oven or the controls may be set incor rectly The oven did not reach 200 F 93 C within 15 min utes of startup and the oven has stopped heating Controls may be set incor rectly Air fingers may have been reassembled incorrectly after cleaning Conveyor may be jammed on an object in the oven or conveyor belt or drive chain tension may be incorrect 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 Agentto determine and correct the cause of the condition to prevent damage to the oven Check that the circuit breaker fused disconnect is turned on Check that the BLOWER 9 Switch is in the ON 1 position Turn the HEAT 502 BLOWER CONVEYOR a o switches to the OFF position Waitfor AT L
31. S 23035 O Z or o a m 5 CONVE OONVIS SSEM IHM YOSNAS A Ndtl VN3CVO 30 YOLOW 3tOIVI IOdSNV II 130 38OIOW OLNNIA TW RIO VS32 Idle SUOLOWGYNELNOdS Wel SIA INNIN Otld 230 ONNIHDIIOASONNASUSNF UNALOdSNVUL 30 YNSLOW UNALON INIORU 351030 dN ADId del YOLOW ANOO QVQIOO 3A JINGOW VIIDOTSA OQNVAOO 3TIONINOPISHIDIOIINIWHOS3O 8510 3SS3L1A NOW INOW 43485 LOAVIAOISNVAL AOAVIOAUNOD 130 OANVNOD ONNUANALS AMOIANIMHOSIOANVE ANFAIANOD YNTIOUINOO UOASANOD 60281 0255 39 A00b 08 3 Ol POA 4 32523 25505 50545 OINGIAVINTIVO 985 3G UOLANEIRIIINI 3HOTvO 130 3OLNIIZINI 8825 USLTVHOSSONNZISH 3 de RIOIVANOISNVAL HOLAS van 5 YJOMMARIOISN VEL UNZIVAO SN VAL AOZ L AUVANOOSS 7H 09 08 2 0 2 LUN aX OONVIG 87 OONVIS ON OONVI8 zX OGNdTOdS2IOIVTIINSA JOLANARIZINI V IOINSA VT130 3tOIfhiBINI IHM e YIVHOSISV 1839 Le eINSIVIILNZA HOLMS UIMOTS LS LX YOLdNUYSLNI FUOLWNOOANOOD 139 FUOLLNUUSINI sar IvHOSSQNvaednv In3lVInINWOO MS ANOD MO YOJON 9 x S zJOGVTIIN3A YOLOW RIOLON 13Q VIOINIA N3HOIOM 351839 1N3IAGSSIGIO J3tId3Q UNTLON YOLOW 33MO18 YOLOVINOD 00 8 9 ON
32. SS3LlA NOLIVIND38 JINON AV 1dSIGQ 43885 HOGVIHOdSNVHI 30 130 ONNE3N3LS HISADIONIMHOSIDONVE UN3AOANOI UNFIOHLNOD UFTIOHLNOI 60281 0255 39 AO0vZ 0 23 OL 8085 m s lt 2 lt 25545 f HYdOWH3 L gt 56202 OLNSINVLNITVO ViddOOOWHS LYS HndOWH3H l HOLdnHH31NI anasz f 3dAL 31dOOJOMNE3HL 3HO1VO 130 3HOLLOHH3LNI 5098 221 H3ITIVHOSSONRZI3H 434 HOOVWHOSSNVHL HOLA 5754 2r HO1VWHO3SNVH1 E 35 UN3IVWHOSSNVHL 55 AYWANODIS ZH 09 05 AO8Z 0vZ HOLANBELNI 3HOIVIOnH8 140 VIOLNSA 8 1140 3HO1L nHH31NI an 3Sv 1835H3NN3HH H3rivHOSld ll ex OdVd1OdS HOIVTILN3A HOLANYUELNI IHM Le VIOLN3A V1130 3HOLQHH3INI H3riyHos3svid35 Hn31VLOWWOO HOLIMS 6L v IS O O O HOQVLHOdSNVHI HOLdPOHH3INI 3HOJVI TOOANOO 7130 3HOLLOHH3AINI 55 UNFAOANOI UNF MLANNOO MS SONILL3S HOLIMS 09 OLN3IIAVIHJN3 8v HOQVIILNAA OLN3IAVOQ3H JJVH IQ 3HO1VTILN3A 3Sv1839 Hn 29 YNILVTILNIA ONI1000 HOLOW YOLOVLNOS 3HOLON 130 VIOLNSA N38OLOW 3SV1839 IN3N3SSIO OY438 ENALON Oc WOO G
33. TION NEAR THE OVEN FOR FUTURE REFERENCE Model No Mod le No Serial No Seri No MIDDLEBY MARSHALL No QUIBBLE LIMITED WARRANTY U S A ONLY MIDDLEBY MARSHALL HEREINAFTER REFERREDTO AS THE SELLER WARRANTS EQUIPMENT MANUFACTURED BY 1 TO BE FREE FROM DEFECTS IN MATERIAL AND WORKMANSHIP FOR WHICH 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 MATERIAL EXPENSE INCURRED BY SELLER IN REPAIRING OR REPLACING SUCH PART SUCH WARRANTY SHALL BE LIMITED TO THE ORIGINAL PURCHASER ONLY AND SHALL BE EFFEC TIVEFOR A PERIOD OF ONE YEAR FROM DATE OF ORIGI NAL INSTALLATION OR 18 MONTHS FROM DATE OF PUR CHASE 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 autho rized 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 personnel Authorized service agencies are located in prin cipal cities throughout the contiguous United States Alaska and Hawaii This warranty is valid in the 50 United States and is void elsewhere unless the produc
34. Turn the BLOWER and HEAT switches to OFF or O NOTE Theblowers will remain on until the oven tempera ture 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 H TEMPERATURE Middleby 7728 Marshall OFF O O HEAT ON CONVEYOR O ACTUAL TEMP SP LOCK O OVER TEMP Figure 3 6 Control Panel 19 SECTION 3 OPERATION NORMAL OPERATION STEP BY STEP 7 Wait for the oven to heat to the setpoint temperature Higher setpoint temperatures will require a longer wait A Daily Startup Procedure The oven can reach a temperature of 500 F 232 C in 5 approximately 15 minutes 1 Check that the circuit breaker fused disconnect is the on position E c O A AA 8 Optional Pressthe Tem Middicby 2 Turn the BLOWER perature key to show MET Oe e OFF ON the Actual Temperature O sP Lock I position in the display and wait for the ACTUAL TEMP light to turn on This al lows you to monitor the E A oven temperature as it 3 Turnthe CONVEYOR CONVEYOR rises to the setpoint gt switch to the OFF ON ON I position O 9 Allow the oven to preheat for 10 minutes after it has reached the set po
35. V HH H3MOT 80787 A1J8IN3SSV DNI H183M0O1 18687 2 S WALI SIANTINI ATINISSV DNI H1H3ddn NOLLdIHI9S3A ON LH Vd ALO MIA 4300 1IdX3 3 19NIS 41 SECTION 6 PARTS LIST SECTION 6 PARTS LIST 12 5 ONIGNL 7620 05 22 6 OM NI 9L 0 HIV HOLIMS 01909 8 VINO STIAON 072 802 ME dY 0S L3SQHOO Z SdlOd H3MOd 42018 9766006 9 ZH 09 06 VS9 0 2 802 HOLOV INOO 90v4G 6 A802 ONLLV3H LN3IN3 13 91409 p ONLLV3H LN3IN3 T3 21019 p ONLLV3H LN3IAN3 T3 86614 p ONLLV3H LN3IN3 T3 19619 V00L MNIS LV3H 20714 dZON 10O TH3 1NI HOLIMS 1700 12082 2 OZ LX0OS 2 GACTAIHS 31d1090INH3HL G 218 NOLLdIHI9S3A ON LH Vd ALO TANVd AV 13d 43 SECTION 6 SECTION 6 PARTS LIST 22 5 ONIANL 1620 09r22 01 39N1Y8IV JINVI1D 9 9 6 2000 52 191 HOLIMS HIV t t ANNAN TV SEN 124 ZE 8 NMOHS LON DNITOOO auvno 16712 8 81 Xc 0L Y3IAINOHS HOS ELVZLOOZ 9 31V 1d 89 9 2 6 ZH09 0S 082 803 MO H3MO 18 HOLON 22 2 W49 462 OV 66219 MOGNIM YIANNA 12602 2 2 410d ZON VOL AHV LN3INOI HO LIMS 1900 12082 NOLLdIHOSIO ON LH Vd ALO AT18IN3SSV H3MO 18
36. be performed during regular working hours Overtime premium will be charged to the Buyer This warranty is not valid unless equipmentis installed started and demonstrated under the supervision of a factory autho rized installer Normal maintenance functions including lubrication adjustment of airflow thermostats door mechanisms microswitches burners and pilot burners and replacement of light bulbs fuses and indicat ing 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 respon sible 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
37. eckbrushes on D C conveyor motor when worn to less than 1 10 2 4mm replace the brushes B Check your oven venting system IMPORTANT NOTICES e Installation of replacement parts requiring access to the interior of the oven is permitted only by an authorized service technician lfthere are any problems with the operation of the oven the authorized service technician must be called lt is suggested to obtain a service contract with a manufacturer s authorized service technician 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 Figure 4 36 The kit can be purchased when the oven is production if a failure occurs ordered or later from a Middleby Marshall Authorized Parts Distributor The kit contains many of the crucial Heplacement partsforthis kitcan be purchased from your Middleby Marshall Authorized Parts Distributor PS520 SERIES ELECTRIC OVEN KEY SPARE PARTS KIT Figure 4 36 ITEM PARTNO ENGLISH DESCRIPTION QUANTITY 1 47321 Kit Temperature Control On Off Pid 1 2 51402 Relay 100A 1 3 58500 Conveyor Drive Motor and Magnet 1 4 60542 Conveyor Speed Control 1 5 33812 5 Thermocouple 1 6 50715 Heater Element 208V 1 6 51017 Heater Element 240V 1 6 51958 Heater Element 380V 1 6 51961 Heater Element 480V 1 7 57408 Contactor 1 8 60598 Air Switch 1 The proper location for the thermocouple is as follo
38. f the groove which will prevent inserting the finger in the groove if the outer plate is moved away from the flange of the finger manifold Figure 4 16 Tab gt g Outer Plate Flange of LL Finger Manifold Outer Plate Figure 4 17 29 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 ringer Much Space Blank Plate Tab on Outer Plate of Finger Located in Groove Correct Top Finger Edges Overlap Completely Blank Plate Tab on Outer Plate of Finger Located in Groove Figure 4 18 30 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 Removable Air Fingers inside baking chamber Console Controls Temperaturer Controller Conveyor Speed II Control p oj nm 4 Conveyor ETA N X gt Motor SS nsl d e E SS RSS SSS AR U ql Motor Housing Y Guard 2 Adjustable rumb Pan Removable Legs Conveyor Assembly Figure 4 20 31 SECTION 4 MAINTENANCE N E ZZ L Figure 4 19 Blower and C
39. he blower motor compartment and the control compart ments 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 covering with tapered holes which direct 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 w Conveyor Drive Motor Right Control Box Figure 1 5 Machinery Compartment Components SECTION 1 DESCRIPTION WH N 9 Cooling Fan Grille 6 Cooling Fan Figure 1 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 Half Blank Plate e Outer Plate Inner Plate Blank Plate 27 Manifold Assembly Baffle Figure 1 7 Blank Plates two sizes and an Air Finger SECTION 2 INSTALLATION 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 NEC or ANSI NF
40. int temperature DAILYSHUTDOWNPROCEDURE 4 f necessary adjust the conveyor speed setting TEET m by pressing the or 15 TUE AEAT near 9 BLOWER pushbuttons on the con veyor speed controller to change the displayed bake time BLOWER 60 swit OFF ON ches to the OFF p a position Note that the blowers will remain in op IS CI ee A CI eration until the oven has 5 Adjust the temperature Tm to below 200 F controller to a desired set 93 temperature if neces s 2007 wait saly 2 Make certain that there CONVEYOR e Press the Set Point are no products left on SE on and Unlock keys at the conveyor inside the O the same time Wait oven Turn the CON forthe SET PT light VEYOR switch to to turn on the OFF O position e Press the Up Arrow x and Down Arrow 7778 Marshall P HEAT ON 3 Keys as necessary E to adjust the set point 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 6 Turn the HEAT 7 switch to the ON I position and wait for the HEAT ON light to turn CAUTION on In case of power failure turn all switches to the OFF position and remove the product After the power has been restored perform the normal star
41. 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 TABLEOFCONTENTS TABLEOFCONTENTS Continued Page Page SECTION 1 IV NORMAL OPERATION STEP BY STEP 20 MODEL IDENTIFICATION 1 A Daily Startup Procter a EC ts 20 SERIES PS520 ELECTRICAL SPECIFICATIONS 2 B Daily Shutdown Procedure 20 COMPONENT FUNCTION 4 V QUICK REFERENCE TROUBLESHOOTING 22 A Conveyor Motor and Conveyor Belt
42. meter cutout hole in the back of the machiney compartment provides access for the electrical supply connections on 380V and 480V units 208V and 240V units have a cord and plug Using flexible cable s for the electrical power supply conductors re quires a 2 b1mm 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 cur rent required refer to the data plate for the ampere specifications The electric current rating for each conductor supplying a PS520 Series Oven ranges from a minimum of 17 3 amperes to a maximum of 39 9 amperes Typical specifications for each PS520 Series Oven are 208V or 240V 1 phase 3 wire 8 3kW this oven requires 50 ampere service APS520 Series Double Oven Figure 1 2 installation would require two 50 ampere service connections one for each oven the 8 3kW power con sumption also doubles for such an installation to 16 6kW The 208V or 240VAC electrically heated oven uses two legs of the supplied power to provide 208V or 240VAC power for the oven control circuitry ELECTRICAL INLET N 2 Me UN Figure 2 11 Junction Connection SECTION 2 INSTALLATION NOTES SECTION 3 OPERATION SECTION 3 OPERATION CONTROL FUNCTIONS Blower Heat Temperature Switch Switch Controller
43. month depending on the volume of baking To cleanthe interior you haveto disassemble some parts of the oven When cleaning your Series PS520 Oven note the following PRECAUTIONS 1 Do not use excessive water or saturation of 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 cleaning For heavier cleaning of baked on grease and carbon deposits use a non caustic cleaner that will not react with SECTION 4 MAINTENANCE the aluminized finger manifold surfaces You can order non caustic cleaner from your local autho rized Middleby Marshall Parts Distributor in the quantities listed below Part Quantity 27170 0244 Case of Quarts 6 27170 0246 Case of Gallons 4 A Removing Conveyor From Oven For Cleaning 1 Remove entry and exit trays 2 Loosen do not remove two screws on housing guard 3 Remove motor housing guard 4 Lift conveyor and remove chain Removable Air Fingers inside baking chamber Console Controls Temperaturer Controller Conveyor gt a 4 14 N g gt N s o I S d L u Inside Motor A N 2 Housing Y Guard Removable Crumb Pan Removable Legs Conveyor Assembly Blower and Cooling Fan Motor Adjustable Eyebrow
44. n in Figure 4 2 Reinstall the crumb pans atter cleaning B Cooling Fan 1 ONE COOLING FAN GRILLEAT THEREAR OF THE OVEN MUST BE CLEANED DAILY Clean grille with a Fannie stiff nylon type brush 2 Check the 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 OPERATING 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 n gt Nl j 2 RT res 7 3 Using a stiff nylon brush clean control compartment vent grille gt C Conveyor Belt Figure 4 2 Everyday just after starting the oven stand at the unloading end ofthe conveyor and with a brush remove food particles crumbs etc clinging to the conveyor belt brushing them into the crumb pan Figure 4 2 Conveyor Belt and Crumb Pan Cleaning 24 MAINTENANCE MONTHLY NOTE The oven interior may require cleaning more than once a
45. ooling Fan Motor 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 drive end of the oven the drive sprocket assembly must be removed as shown in conveyor disassembly section JMN Figure 4 21 Reinstall the conveyor extension Conveyor Extension Figure 4 22 32 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 ce X gt SS IN Figure 4 23 G Conveyor Belt Link Removal 1 Using long nose pliers an entire link can be removed with the conveyor assembly either in or out of the oven Position master links at end of conveyor as shown in Figure 4 24 Figure 4 24 2 Using long nose pliers unhook master links at left end of conveyor as
46. oven s Never disas semble 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 Never 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 1 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 connector 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 23 SECTION 4 MAINTENANCE MAINTENANCE DAILY D Crumb Pans Figure 4 2 A Exterior Everyday you should clean the outside of the oven with a WARNING soft cloth and mild detergent Crumb pan is extremely hot while oven is operating Allow oven to cool before removing crumb pan WARNING Never use a water hose or pressurized steam Whenthe oven cool remove andcleanthe crumb pan at cleaning equipment when cleaning the oven each end ofthe oven Each crumb pan can be removed by sliding it out as show
47. t 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 particu lar purpose The foregoing shall be Seller s sole and exclusive obligation and Buyer s sole and exclusive remedy for any action in cluding 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 O 2003 Middleby Marshall A Middleby Company Installation Date 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 shall
48. tup procedure IF THEOVEN WAS SWITCHED OFF FOR LESSTHAN 5 MINUTES WAIT FOR AT LEAST FIVE MINUTES BEFORE RESTARTING THE OVEN 20 Display HEAT ON Shows the Set Point Light or the Actual Tem Lights when the perature degrees burner is in Fahrenheit F or operation Celsius C SP LOCK Light Lights when the set point is locked out from changes This setting can only be changed by service persomnel OVERTEMP Light Lights when the oven temperature is greater than 650 F 343 C Refer to Quick Reference Troubleshooting in this section Temperature Key Press this key once to view the Actual Temperature in the Display Unlock Key Press this key together with the Set Point Key to allow the Set Point to be changed Changes can only be made for 60 seconds morsa HEAF N SET PT ACTUAL TEMP SP LOCK OVER TEMP 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 21 SECTION 3 OPERATION SET PT setpoint Light Lights when the set point is shown in the display ACTUAL TEMP Light Lights when the Actual Temperature is shown in the display Service Key Service use only Set Point Key Press this key together with the Unlock Key to allow the Set Point to be changed Changes can only be made for 60 sec onds SECTION 3 O
49. ws 1 Temperature sensing is located on the entrance end of the unit on the bottom 2 High limit is located on the exit end of the unit on the top 3 High limit on the PS520 is 600 degree s Figure 4 36 36 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 preparation 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 Hefer to Section 4 procedure or call your Middleby Marshall Service Agency PROBLEM OVEN BLOWER AND CONVEYOR OPER ATE 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 call your Middleby Marshall Service Agency PROBLEM CONVEYOR WIL
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