Middleby Marshall PS520G Owner's Operating And Installation Manual
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Middleby Marshall PS520G Owner's Operating And Installation Manual

Ps520-series
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A MIDDLEBY COMPANY
owner's
operating
& installation
manual
PS520-Series OVENS
Model PS520G
PS520 (Double)
©2006 Middleby Marshall
®
Inc.
PS520-Series Gas Ovens: English
October 17, 2006
PS520 (Single)
PS520 (Triple)
Part No. 59223
Price $30.00
P: 10/06

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Summary of Contents for Middleby Marshall PS520G

  • Page 1 Marshall Marshall Marshall Marshall Marshall A MIDDLEBY COMPANY owner's operating & installation manual PS520-Series OVENS Model PS520G PS520 (Double) Inc. ©2006 Middleby Marshall ® PS520-Series Gas Ovens: English October 17, 2006 PS520 (Single) PS520 (Triple) Part No. 59223 Price $30.00...
  • Page 2 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. POST, IN A PROMINENT LOCATION, THE EMERGENCY TELEPHONE NUMBER OF YOUR LOCAL GAS SUPPLIER AND INSTRUCTIONS TO BE FOLLOWED IN THE EVENT YOU SMELL GAS.
  • Page 3 © 2003 - Middleby Marshall, A Middleby Company. 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 Serial No.

  • Page 4: Table Of Contents

    Troubleshooting Charts ... 39 SECTION 6 ELECTRICAL SCHEMATICS Wiring Diagram, G208-240V 50/60 GO, PS520 ... 41 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. (Continued) Page...

  • Page 5: Model Identification

    DESCRIPTION SECTION 1 DESCRIPTION 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.

  • Page 6: Series Ps520 Electrical Specifications

    SERIES PS520 ELECTRICAL SPECIFICATIONS Main Blower & Control Circuit Elements Voltage Voltage 208-240V 208-240V GAS ORIFICE AND PRESSURE SPECIFICATIONS (PER OVEN CAVITY) - DOMESTIC AND STANDARD EXPORT OVENS Gas Type Main Orifice I.D. Natural 0.082” (2.08mm, #45 drill) Propane 0.057” (1.45mm, #46 drill) * The gas supply pressures and orifice sizes shown are for ovens installed in North America.
  • Page 7 SECTION 1 DESCRIPTION II. COMPONENT FUNCTION (Figure 1-4) Figure 1-4. PS520-Series Oven Components Locations...

  • Page 8: Component Function

    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.
  • Page 9 SECTION 1 DESCRIPTION Figure 1-6. Cooling Fan...
  • Page 10 SECTION 1 DESCRIPTION Half Blank Plate Outer Plate Inner Plate Blank Plate Finger Manifold Assembly 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. Baffle...

  • Page 11: Section 2 Installation

    Recommended minimum clearances are specified in the Description section of 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.

  • Page 12: Section 2 I. Unloading

    ITEM Figure 2-1. PS520-Series Gas Oven Installation Parts I. 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: The crate and carton must be examined before signing the Bill of Lading.
  • Page 13 PART NO. 48392 48394 48396 51387 M3828 59223 22450-0228 22361-0001 Figure 2-1 (continued). PS520-Series Gas Oven Installation Parts INSTALLATION KIT Double Stack Oven P/N 59183 DESCRIPTION INSULATION BOTTOM TRAY BOTTOM TRAY WELDMENT TOP COVER SCREW MSSLT THREAD 8-32 × 1/2, 18-8 LEG 4″...
  • Page 14 SECTION 2 INSTALLATION 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. 4.00 101.6mm...
  • Page 15 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. P/N 59927 is shown in its correct installed position. SECTION 2 INSTALLATION 4.00 101.6mm...
  • Page 16 SECTION 2 INSTALLATION 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. P/N 59927 is shown in its correct installed position.

  • Page 17: Utility Rough-In Dimensions And Positioning For Ps520-Series Ovens

    STALLED OR WARRANTY WILL BE VOID. II. 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.

  • Page 18: Electrical Connection Information For Ps520-Series Ovens

    ‘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. III. ELECTRICAL CONNECTION INFORMATION FOR PS520-SERIES OVENS.

  • Page 19: Gas Supply

    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.

  • Page 20: Section 2 Installation

    Manual. Adjust the temperature controller to the maximum setting 600°F (316°C). Measure the supply (inlet) pressure. Switch the oven off. Close the main gas supply valve, and switch the circuit breaker/fused disconnect to the OFF (“O”) position. Remove the manometer, and close the inlet tap.

  • Page 21: Control Functions

    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 before attempting to clean or service this oven.

  • Page 22: Component Information And Location

    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...

  • Page 23: Conveyor

    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. WARNING Possibility of injury from rotating parts and electrical shock exist in this oven.

  • Page 24: Step-By-Step Operation

    “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.
  • Page 25 SECTION 3 OPERATION Figure 3-6. Control Panel...

  • Page 26: Normal Operation - Step-By-Step

    SECTION 3 OPERATION IV. NORMAL OPERATION - STEP-BY-STEP A.Daily Startup Procedure (Optional) DAILY SHUTDOWN PROCEDURE wait IMPORTANT CAUTION wait wait...
  • Page 27 SECTION 3 OPERATION Display "HEAT ON" Light "SP LOCK" Light "SET PT" (setpoint) Light OVERTEMP Light "ACTUAL TEMP" Light Service Key Temperature Set Point Key Unlock Key Up Arrow and Down Arrow Keys...

  • Page 28: Quick Reference: Troubleshooting

    Conveyor moves with a jerky motion, or will not move at all Food products are overcooked or undercooked. IF THESE STEPS FAIL TO RESOLVE THE PROBLEM, CONTACT YOUR LOCAL MIDDLEBY MARSHALL AUTHORIZED SERVICE AGENT. A SERVICE AGENCY DIRECTORY IS SUPPLIED WITH YOUR OVEN.

  • Page 29: Section 4 Maintenance

    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: If the oven was moved for servicing, return the oven to its original location.

  • Page 30: Maintenance - Daily

    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.

  • Page 31: Maintenance - Monthly

    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. You can order non-caustic cleaner from your local autho- rized Middleby Marshall Parts Distributor in the quantities listed below: Part # 27170-0244...
  • Page 32 SECTION 4 MAINTENANCE Figure 4-4. Figure 4-5. 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.

  • Page 33: Air Fingers Disassembly For Cleaning

    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.

  • Page 34: Reassembly Of Air Fingers

    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.
  • Page 35 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.
  • Page 36 SECTION 4 MAINTENANCE 5. Install fingers and blank plates correctly with edges interlocked and no space between edges. Top Finger Tab on Outer Plate of Finger Located in Groove Top Finger Tab on Outer Plate of Finger Located in Groove Top Finger Tab on Outer Plate of Finger Located in Groove...

  • Page 37: Reinstall End Plugs

    SECTION 4 MAINTENANCE 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.

  • Page 38: 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.

  • Page 39: Conveyor Belt Link Removal

    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. Master Links Figure 4-24.

  • Page 40: Attaching Drive Chain

    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.

  • Page 41: Maintenance - Every 3 Months

    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. A. Electrical Terminals Open the control cabinet door by removing the three screws from the control cabinet door.

  • Page 42: Ps520-Series Gas Oven Key Spare Parts

    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 PS520-SERIES GAS OVEN KEY SPARE PARTS KIT (Figure 4-36) ITEM PART NO.

  • Page 43: Section 5 Troubleshooting

    OVEN BLOWER AND CONVEYOR OPER- ATE, YET THE OVEN IS NOT HEATING Start the oven again. If the oven still does not heat, call your Middleby Marshall Service Agency. setting. CONVEYOR WILL NOT HOLD PROPER SPEED OR WILL NOT RUN AT ALL Check for proper tension of conveyor drive chain and conveyor belt.
  • Page 44 SECTION 5 TROUBLESHOOTING NOTES...

  • Page 45: Section 6 Electrical Schematics

    SECTION 6 ELECTRICAL SCHEMATICS RESET SECTION 6 ELECTRICAL SCHEMATICS LOAD LINE SWITCH HEAT RELAY...
  • Page 46 SECTION 6 ELECTRICAL SCHEMATICS NOTES...
  • Page 47 SECTION 6 ELECTRICAL SCHEMATICS NOTES...
  • Page 48 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.

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Ps520 series

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