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Middleby Marshall PS520 manual

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Table of contents for the manual

  • Page 1

    ©2003 Middleby Marshall Inc. Middleby Middleby Middleby Middleby Middleby Marshall Marshall Marshall Marshall Marshall A MIDDLEBY COMPANY PS520-Series Electric Ovens: English owner's operating & installation manual PS520-Series O VENS Model PS520E PS520 (Triple) PS520 (Double) Part No. 52358 Price $30.00 P: 08/08 Rev. B ® PS520 (Single)[...]

  • Page 2

    ii W ARNING FOR Y OUR SAFETY , DO NO T ST ORE OR USE GASOLINE OR O THER FLAMMABLE V APORS AND LIQUIDS IN THE VICINITY OF THIS OR ANY O THER APPLIANCE. W ARNING Improper installation, adjustment, alteration, service, or maintenance can cause property damage , injury , or death. Read the installation, operation, and maintenance instructions thoroughl[...]

  • Page 3

    iii MIDDLEBY MARSHALL INC. O VEN LIMITED W ARRANTY (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 under this warranty shall be limited to replacing or repairing, at Seller’s option, without charge, F.O.B. Seller’s factory, [...]

  • Page 4

    iv NO TE 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. TABLE OF CONTENTS Page SECTION 1 I. MODEL IDENTIFICATION .............................................. 1 SERIES PS520 ELECTRICAL SPECIFICATIONS ............. 2 II. COMPONENT FUNCTION .......................[...]

  • Page 5

    SECTION 1 DESCRIPTION 1 I . MODEL IDENTIFICATION The Middleby Marshall PS520-Series may be used either as a single oven or stacked for use as double or triple ovens. A single PS520-Series Oven (Figure 1-1) is 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 th[...]

  • Page 6

    2 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 × 35.21 ″ (894mm) W × 21.72 ″ (786mm) H × Overall Dimension Double Oven 42.00 ″ (1067mm) L[...]

  • Page 7

    SECTION 1 DESCRIPTION 3 Figure 1-4. PS520-Series Oven Components Locations[...]

  • Page 8

    4 SECTION 1 DESCRIPTION II. COMPONENT FUNCTION (Figure 1-4) II. 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 can travel in either direction at var[...]

  • Page 9

    SECTION 1 DESCRIPTION 5 Figure 1-6. Cooling Fan[...]

  • Page 10

    6 SECTION 1 DESCRIPTION Half Blank Plate Blank Plate Outer Plate Inner Plate Finger Manif old Assembly Baffle Figure 1-7. Blank Plates (two sizes) and an Air Finger. F2. Blank Plates 1. Blank Plates- The Blank Plates are available to install on the plenum where an air finger is not required.[...]

  • Page 11

    SECTION 2 INSTALLATION 7 SECTION 2 INST ALLA TION 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/NFPA70. NO TE There must be adequate clearance between the oven and any adjacent combustible con- struction. Clearance mu[...]

  • Page 12

    8 SECTION 2 INSTALLATION PARTS LIST FOR SERIES PS520 ELECTRIC OVEN INSTALLATION KIT Single and Double Stack Ovens P/N 48397 Figure 2-1. PS520-Series Electric Oven Installation Parts ITEM NO. QT Y PART NO. DESCRIPTION 1 4 3101908 LEG 4 ″ AD FT 2 2 48392 I NSULATION BOTTOM TRAY 3 1 48394 BOTTOM TRAY WELDMENT 4 1 48396 TOP COVER 5 4 51387 SCREW MSSL[...]

  • Page 13

    SECTION 2 INSTALLATION 9 Figure 2-5. MODEL PS520 SINGLE OVEN DIMENSIONS The Opening Height is Adjustable from 2-1/4 inch minimum to 3-3/4 inch maximum in 1/2 inch increments. 1 1[...]

  • Page 14

    10 SECTION 2 INSTALLATION Figure 2-6. MODEL PS520 DOUBLE OVEN DIMENSIONS The Opening Height is Adjustable from 2-1/4 inch minimum to 3-3/4 inch maximum in 1/2 inch increments. 1 1[...]

  • Page 15

    SECTION 2 INSTALLATION 11 Figure 2-7. MODEL 520 TRIPLE OVEN DIMENSIONS The Opening Height is Adjustable from 2-1/4 inch minimum to 3-3/4 inch maximum in 1/2 inch increments. 1 1[...]

  • Page 16

    12 SECTION 2 INSTALLATION 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 eac[...]

  • Page 17

    SECTION 2 INSTALLATION 13 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 th[...]

  • Page 18

    14 SECTION 2 INSTALLATION NO TES[...]

  • Page 19

    SECTION 3 OPERATION 15 SECTION 3 OPERA TION I. 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 “O” and lockout or tagout all electric power to the oven b[...]

  • Page 20

    16 SECTION 3 OPERATION I I . 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 safet[...]

  • Page 21

    SECTION 3 OPERATION 17 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 [...]

  • Page 22

    18 SECTION 3 OPERATION WARNING OVEN MUST BE KEPT CLEAR OF COMBUSTIBLES AT ALL TIMES. III. STEP-BY-STEP OPERATION A. Startup Procedures Daily Startup 1. Turn the BLOWER switch (Figure 3-6) to the “ON” or “I” position. This starts the main blower fan and the cooling fans. The blower circulates air through the air fingers and must stay on duri[...]

  • Page 23

    SECTION 3 OPERATION 19 Figure 3-6. Control Panel[...]

  • Page 24

    20 SECTION 3 OPERATION 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 procedure. IF THE OVEN WAS SWITCHED OFF FOR LESS THAN 5 MINUTES, WAIT FOR AT LEAST FIVE MINUTES BEFORE RESTARTING THE OVEN. A.Daily Startup Procedu[...]

  • Page 25

    SECTION 3 OPERATION 21 Display Shows the Set Point or the Actual T em- perature in degrees Fahrenheit (F) or Celsius (C). "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 Qui[...]

  • Page 26

    22 SECTION 3 OPERATION V. QUICK REFERENCE: TROUBLESHOOTING SYMPTOM PROBLEM SOLUTION The oven temperature ex- ceeded 650°F (343°C), and the burner was automati- cally shut down. • 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 c[...]

  • Page 27

    SECTION 4 MAINTENANCE 23 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 oven(s). Never disas- semble or clean the oven with the blower switch or any other part of the oven t[...]

  • Page 28

    24 SECTION 4 MAINTENANCE I. 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. ONE COOLING FAN GRILLE AT THE REAR OF THE OVEN MUST BE CLEANED DAILY - Clean grille with [...]

  • Page 29

    SECTION 4 MAINTENANCE 25 Figure 4-3. II. 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 saturatio[...]

  • Page 30

    26 SECTION 4 MAINTENANCE 5. Lift other side of conveyor and push toward other side. 6. Remove conveyor as shown. Figure 4-6. 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 Figure 4-4. Figure 4-5.[...]

  • Page 31

    SECTION 4 MAINTENANCE 27 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, mark that plate also. Fingers are marked in the order shown; as viewed from the front of the oven. (The marks for an [...]

  • Page 32

    28 SECTION 4 MAINTENANCE 6. 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 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. Standar[...]

  • Page 33

    SECTION 4 MAINTENANCE 29 4. Replace the air fingers by pushing in at the back side. 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 [...]

  • Page 34

    30 SECTION 4 MAINTENANCE 5. Install fingers and blank plates correctly with edges interlocked and no space between edges. Figure 4-18. Top Finger Incorrect - Too Much Space Blank Plate Tab on Outer Plate of Finger Located in Groove Top Finger Incorrect - Too Much Space Blank Plate Tab on Outer Plate of Finger Located in Groove Top Finger Correct - [...]

  • Page 35

    SECTION 4 MAINTENANCE 31 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. Figure 4-19. Figure 4-20.[...]

  • Page 36

    32 SECTION 4 MAINTENANCE 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 ?[...]

  • Page 37

    SECTION 4 MAINTENANCE 33 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 shown in Figure 4-25. Figure[...]

  • Page 38

    34 SECTION 4 MAINTENANCE 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. 2. Lift conveyor and install drive chain to conveyor drive sprocket and motor sprocket. [...]

  • Page 39

    SECTION 4 MAINTENANCE 35 4. Reattach conveyor guard to control panel and secure two screws. Install both upper end plugs. Figure 4-34. III. 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 autho[...]

  • Page 40

    36 SECTION 4 MAINTENANCE KEY SPARE PARTS KIT An oven can be purchased with a Key Spare Parts Kit (Figure 4-36). (The kit can be purchased when the oven is ordered, or later, from a Middleby Marshall Authorized Parts Distributor). The kit contains many of the crucial parts that can reduce serious downtime and loss of production, if a failure occurs.[...]

  • Page 41

    37 SECTION 5 TROUBLESHOOTING SECTION 5 TR OUBLESHOO TING PROBLEM: PRODUCTS ARE OVERCOOKED OR UNDERCOOKED Check for correct setting of conveyor speed control. Set the conveyor speed control at correct setting. Check for correct setting on tempera- ture controller. Turn temperature control to correct setting. If products still cook incorrectly, call [...]

  • Page 42

    SECTION 5 TROUBLESHOOTING 38 NO TES[...]

  • Page 43

    39 ENGLISH SECTION 6 PARTS LIST SECTION 6 - P AR TS LIST[...]

  • Page 44

    40 ENGLISH SECTION 6 PARTS LIST[...]

  • Page 45

    41 ENGLISH SECTION 6 PARTS LIST SINGLE OVEN EXPLODED VIEW ITEM QT Y PART NO. DESCRIPTION 1 1 48382 UPPER LH END PLUG ASSEMBLY (INCLUDES ITEM 5 EYEBROW) 2 1 48387 LOWER LH END PLUG ASSEMBLY 3 1 48408 L O WER RH END PLUG ASSEMBLY 4 1 48412 UPPER RH END PLUG ASSEMBLY (INCLUDES ITEM 6 EYEBROW) 5 1 48378 EYEBROW, UPPER LH END PLUG ASSEMBLY 6 1 48410 EYE[...]

  • Page 46

    42 ENGLISH SECTION 6 PARTS LIST[...]

  • Page 47

    43 ENGLISH SECTION 6 PARTS LIST RELAY PANEL ITEM QT Y PART NO. DESCRIPTION 1 1 33812-5 THERMOCOUPLE, TYPE “J”, SHIELDED 2.50X120” 2 1 28021-0047 SWITCH, INTERLOCK, 10A, NO2P 3 1 51402 RELAY, HEATSINK 480VAC 100A 4 1 51961 ELEMENT, HEATING, 480V 4 1 51958 ELEMENT, HEATING 380V 4 1 51017 ELEMENT, HEATING 240V 4 1 50715 ELEMENT, HEATING, 208V 5 [...]

  • Page 48

    44 ENGLISH SECTION 6 PARTS LIST[...]

  • Page 49

    45 ENGLISH SECTION 6 PARTS LIST BLOWER ASSEMBLY ITEM QT Y PART NO. DESCRIPTION 1 1 28021-0061 SWITCH, MOMENTARY-1OA, NO 2 POLE 2 2 30927 BUMPER, WINDOW 3 1 51399 FAN, COOLING, 230V AC, 295 CFM 4 2 52244 MOTOR, BLOWER, CW, 208/230 50/60HZ 5 2 57258 PLATE, AIR VENT 6 4 7007413 SCR, SHOULDER 10-32X, 34 18-8 7 1 31497 GUARD, COOLING FAN (NOT SHOWN) 8 1[...]

  • Page 50

    46 ENGLISH SECTION 6 PARTS LIST[...]

  • Page 51

    47 ENGLISH SECTION 6 PARTS LIST CONTROL PANEL ITEM QT Y PART NO. DESCRIPTION I 3 46521 KIT BLOWER SWITCH CONTAINS ((1) 44697, (1) 44696)) 2 3 44697 CO N TACT BLOCK 3 3 44696 SELECTOR SWITCH 4 1 60542 CONVEYOR SPEED CONTROL W/DIGITAL SPEED DISPLAY 5 1 37503 DIGITAL SPEED CONTROL (DISPLAY ONLY) 6 1 50990 CONTROL, COMBO 4-20MA BURST 7 1 28041-0011 CON[...]

  • Page 52

    48 ENGLISH SECTION 6 PARTS LIST[...]

  • Page 53

    49 ENGLISH SECTION 6 PARTS LIST SINGLE CONVEYOR ITEM OT Y PART NO. DESCRIPTION 1 1 48471 WELDMENT 2 4 M4817 BEARING, RULON 3 1 M4815 SHAFT, DRIVE 4 1 51408 SHAFT, IDLER 5 1 0 M4818 SPROCKET, WIRE BELT 6 1 M7471 BELT, WIRE, STN STL 18" X 7.5` LONG 7 1 50060 LINK, MASTER LEFT 1/2P-18” 8 1 50062 LINK, MASTER CENTER 1/2P-18” 9 1 50061 LINK, MA[...]

  • Page 54

    50 ENGLISH SECTION 6 PARTS LIST NOTES[...]

  • Page 55

    51 SECTION 7 ELECTRICAL SCHEMATICS SECTION 7 ELECTRICAL SCHEMA TICS Wiring Diagram, E208-240 50/60/1, PS520[...]

  • Page 56

    SECTION 7 ELECTRICAL SCHEMATICS 52 Wiring Diagram, E380-480V 50/60/1, PS520[...]

  • Page 57

    53 SECTION 7 ELECTRICAL SCHEMATICS Wiring Diagram, E230-240V CE PS520/1820S[...]

  • Page 58

    SECTION 7 ELECTRICAL SCHEMATICS 54 Wiring Diagram, E380-400V CE PS520/1820S[...]

  • Page 59

    55 SECTION 7 ELECTRICAL SCHEMATICS NO TES[...]

  • Page 60

    Middleby Cooking Systems Group • 1400 Toastmaster Drive • Elgin, IL 60120 • USA • (847)741-3300 • FAX (847)741-4406 www .middleby .com 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. W [...]