Middleby Marshall PS520 User Manual Page 1

©2003 Middleby Marshall Inc.MiddlebyMiddlebyMiddlebyMiddlebyMiddlebyMarshallMarshallMarshallMarshallMarshallA MIDDLEBY COMPANYPS520-Series Electric Ov

6SECTION 1DESCRIPTIONHalf Blank PlateBlank PlateOuter PlateInner PlateFinger Manifold AssemblyBaffleFigure 1-7. Blank Plates (two sizes) and an Air F

SECTION 2INSTALLATION7SECTION 2INSTALLATIONNOTE: The oven, when installed, must be electricallygrounded in accordance with local codes, or in the ab-

8SECTION 2INSTALLATIONPARTS LIST FOR SERIES PS520 ELECTRIC OVENINSTALLATION KITSingle and Double Stack OvensP/N 48397Figure 2-1. PS520-Series Electri

SECTION 2INSTALLATION9Figure 2-5. MODEL PS520 SINGLE OVEN DIMENSIONSThe Opening Height is Adjustable from 2-1/4 inch minimumto 3-3/4 inch maximum in

10SECTION 2INSTALLATIONFigure 2-6. MODEL PS520 DOUBLE OVEN DIMENSIONSThe Opening Height is Adjustable from 2-1/4 inch minimumto 3-3/4 inch maximum in

SECTION 2INSTALLATION11Figure 2-7. MODEL 520 TRIPLE OVEN DIMENSIONSThe Opening Height is Adjustable from 2-1/4 inch minimumto 3-3/4 inch maximum in 1

12SECTION 2INSTALLATIONWARNINGDO NOT USE CONDUIT OR GAS LINEFOR GROUND CONNECTION.CAUTIONIT IS RECOMMENDED THAT THE OVENBE PLACED UNDER A VENTILATIONH

SECTION 2INSTALLATION13These ‘C’ Channel brackets are installed in the verticalplane using existing screws (Item 6) to support these ‘C’Channels using

14SECTION 2INSTALLATIONNOTES

SECTION 3OPERATION15SECTION 3OPERATIONI. CONTROL FUNCTIONSWARNINGA possibility of injury from rotating parts andelectric shock exists in this oven.Nev

iiWARNINGFOR YOUR SAFETY, DO NOT STORE OR USEGASOLINE OR OTHER FLAMMABLE VAPORS ANDLIQUIDS IN THE VICINITY OF THIS OR ANY OTHERAPPLIANCE.WARNINGImprop

16SECTION 3OPERATIONII. COMPONENT INFORMATION ANDLOCATION (Figures 3-1 and 3-2)A. Door Safety SwitchThe Door Safety Switch is located at the lower ri

SECTION 3OPERATION17E. ConveyorThe on-off switch for the conveyor motor is on the controlpanel. Also on the control panel is the digital conveyorspee

18SECTION 3OPERATIONWARNING OVEN MUST BE KEPT CLEAR OFCOMBUSTIBLES AT ALL TIMES.III. STEP-BY-STEP OPERATIONA. Startup ProceduresDaily Startup1. Turn t

SECTION 3OPERATION19Figure 3-6. Control Panel

20SECTION 3OPERATIONCAUTIONIn case of power failure, turn all switches to the “OFF”("O") position and remove the product. After thepower ha

SECTION 3OPERATION21DisplayShows the Set Pointor the Actual Tem-perature in degreesFahrenheit (F) orCelsius (C)."SP LOCK"LightLights when t

22SECTION 3OPERATIONV. QUICK REFERENCE: TROUBLESHOOTINGSYMPTOM PROBLEM SOLUTIONThe oven temperature ex-ceeded 650°F (343°C), andthe burner was automa

SECTION 4MAINTENANCE23SECTION 4MAINTENANCEWARNINGPossibility of injury from rotating parts and electricalshock exist in this oven. Turn off and lockou

24SECTION 4MAINTENANCEI. MAINTENANCE - DAILYA. ExteriorEveryday you should clean the outside of the oven with asoft cloth and mild detergent.WARNINGNe

SECTION 4MAINTENANCE25Figure 4-3.II. MAINTENANCE - MONTHLYNOTE: The oven interior may require cleaning morethan once a month depending on the volume

iiiMIDDLEBY MARSHALL INC.OVEN LIMITED WARRANTY(Non U.S.A.)The Seller warrants equipment manufactured by it to be free fromdefects in material and work

26SECTION 4MAINTENANCE5. Lift other side of conveyor and push toward other side.6. Remove conveyor as shown.Figure 4-6.Figure 4-7.CAUTIONBe careful no

SECTION 4MAINTENANCE271. As the air fingers are removed use a felt pen to mark allparts of the fingers. This includes the finger manifold, innerplate

28SECTION 4MAINTENANCE6. To remove the inner plate, pull the plate out and then up.Figure 4-11.7. The outer finger plate is stainless and may be clean

SECTION 4MAINTENANCE294. Replace the air fingers by pushing in at the back side.Remember to replace them according to the numbersmarked on them when t

30SECTION 4MAINTENANCE5. Install fingers and blank plates correctly with edgesinterlocked and no space between edges.Figure 4-18.Top FingerIncorrect -

SECTION 4MAINTENANCE31D. Reinstall End Plugs1. Reinstall lower end plug. Be sure to tighten the wingscrew on the end plug.2. Reinstall conveyor.3. Rei

32SECTION 4MAINTENANCEF. Checking Conveyor Belt TensionWARNINGOven conveyor belt must be cool when adjustingbelt. Do not adjust belt if HOT.1. With th

SECTION 4MAINTENANCE33G. Conveyor Belt Link Removal1. Using long nose pliers, an entire link can be removedwith the conveyor assembly either in or out

34SECTION 4MAINTENANCEH. Attaching Drive Chain1. If drive sprocket assembly was removed reassemble itinto the conveyor drive shaft. Be sure flat on en

SECTION 4MAINTENANCE354. Reattach conveyor guard to control panel and securetwo screws.Install both upper end plugs.Figure 4-34.III. MAINTENANCE - EVE

ivNOTEWiring Diagrams are in Section 7 of this Manual.The diagram for each oven is also on the lowerinner surface of its Control Console.TABLE OF CONT

36SECTION 4MAINTENANCEKEY SPARE PARTS KITAn oven can be purchased with a Key Spare Parts Kit(Figure 4-36). (The kit can be purchased when the oven iso

37SECTION 5TROUBLESHOOTINGSECTION 5TROUBLESHOOTINGPROBLEM:PRODUCTS ARE OVERCOOKEDOR UNDERCOOKEDCheck for correctsetting of conveyorspeed control.Set t

SECTION 5TROUBLESHOOTING38NOTES

39ENGLISHSECTION 6PARTS LISTSECTION 6 - PARTS LIST

40ENGLISHSECTION 6PARTS LIST

41ENGLISHSECTION 6PARTS LISTSINGLE OVEN EXPLODED VIEWITEM QTY PART NO. DESCRIPTION1 1 48382 UPPER LH END PLUG ASSEMBLY(INCLUDES ITEM 5 EYEBROW)2 1 483

42ENGLISHSECTION 6PARTS LIST

43ENGLISHSECTION 6PARTS LISTRELAY PANELITEM QTY PART NO. DESCRIPTION1 1 33812-5 THERMOCOUPLE, TYPE “J”, SHIELDED 2.50X120”2 1 28021-0047 SWITCH, INTER

44ENGLISHSECTION 6PARTS LIST

45ENGLISHSECTION 6PARTS LISTBLOWER ASSEMBLYITEM QTY PART NO. DESCRIPTION1 1 28021-0061 SWITCH, MOMENTARY-1OA, NO 2 POLE2 2 30927 BUMPER, WINDOW3 1 513

SECTION 1DESCRIPTION1I. MODEL IDENTIFICATIONThe Middleby Marshall PS520-Series may be used eitheras a single oven or stacked for use as double or trip

46ENGLISHSECTION 6PARTS LIST

47ENGLISHSECTION 6PARTS LISTCONTROL PANELITEM QTY PART NO. DESCRIPTIONI 3 46521 KIT BLOWER SWITCH CONTAINS ((1) 44697, (1) 44696))2 3 44697 CONTACT BL

48ENGLISHSECTION 6PARTS LIST

49ENGLISHSECTION 6PARTS LISTSINGLE CONVEYORITEM OTY PART NO. DESCRIPTION1 1 48471 WELDMENT2 4 M4817 BEARING, RULON3 1 M4815 SHAFT, DRIVE4 1 51408 SHAF

50ENGLISHSECTION 6PARTS LISTNOTES

51SECTION 7ELECTRICAL SCHEMATICSSECTION 7ELECTRICAL SCHEMATICSWiring Diagram, E208-240 50/60/1, PS520

SECTION 7ELECTRICAL SCHEMATICS52Wiring Diagram, E380-480V 50/60/1, PS520

53SECTION 7ELECTRICAL SCHEMATICSWiring Diagram, E230-240V CE PS520/1820S

SECTION 7ELECTRICAL SCHEMATICS54Wiring Diagram, E380-400V CE PS520/1820S

55SECTION 7ELECTRICAL SCHEMATICSNOTES

2SECTION 1DESCRIPTIONPS520 SERIES OVEN SPECIFICATIONSConveyor Belt Width 18.00″ (457mm)Heating Zone Length 20.00″ (5098mm)Baking Area Square Feet 2.5

Middleby Cooking Systems Group • 1400 Toastmaster Drive • Elgin, IL 60120 • USA • (847)741-3300 • FAX (847)741-4406www.middleby.comMiddleby is proud t

SECTION 1DESCRIPTION3Figure 1-4. PS520-Series Oven Components Locations

4SECTION 1DESCRIPTIONII. COMPONENT FUNCTION (Figure 1-4)II. COMPONENT FUNCTIONA. Conveyor Motor and Conveyor BeltThe conveyor belt is driven by a var

SECTION 1DESCRIPTION5Figure 1-6. Cooling Fan