Middleby Marshall PS640E III. Maintenance Every 3 Months, Split Belt Disassembly and Cleaning

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III. MAINTENANCE – EVERY 3 MONTHS

A.Check that the oven is cool and the power is discon- nected, as described in the warning at the beginning of this Section.

B.Vacuum both of the blower mounts, and their surrounding compartments, using a shop vacuum.

C.Tighten all electrical terminal screws.

D.Split Belt Disassembly and Cleaning

1.Refer to Part D, Conveyor Installation, in the Installa- tion section of this Manual. Then, remove the following components from the oven:

•Conveyor end stop

•Crumb trays

•Chain cover

•Drive chains

•End plugs

•Conveyor assembly

2.Remove the master links from each conveyor belt. Then, roll the belts up along the length of the conveyor to remove them from the frame.

3.Remove the two conveyor adjustment screws from the idler end of the conveyor frame, as shown in Figure 4-4.

4.Remove the idler shaft assembly from the conveyor.

5.Pull apart the two sections of the idler shaft.

6.Clean the shafts thoroughly using a rag. Then, lubri-cate both the extended shaft and the interior of the hollow shaft using a light food-grade lubricant. DO NOT lubricate the shafts using WD40 or a similar product. This can cause the shafts to wear rapidly.

7.Before reassembling the shafts into the conveyor frame, check that they are oriented properly.

Figure 4-4. Disassembling the idler shaft

8.Reassemble the idler shaft into the conveyor. Make sure that the bronze washer is in place between the two sections of the shaft. See Figure 4-4.

9.Replace the conveyor adjustment screws as shown in Figure 4-4. To allow the conveyor belt to be reinstalled later, do not tighten the screws at this time.

10.Loosen the set screw on both of the conveyor drive sprockets. Then, remove the sprockets from the shaft.

11.Check the conveyor configuration as follows:

High-speed conveyors are equipped with large flange bearings at both ends of the shaft, as shown in Figure 4-5. For these conveyors, remove the two screws that hold each bearing to the conveyor frame. With the screws removed, lift the end of the shaft at the front of the oven, and pull the entire assembly free of the conveyor frame.

Standard conveyors are equipped with bronze bush- ings mounted on spacers at both ends of the shaft, as shown in Figure 4-5. For these convey-ors, remove the two screws that hold the bracket to the conveyor frame. With the screws removed, lift the end of the shaft at the front of the oven, and pull the entire assembly free of the conveyor frame. The brackets will be removed along with the drive shaft assembly.

12.Disassemble and lubricate the two sections of the drive shaft as described for the idler shaft, above.

13.Before reassembling the shafts into the conveyor frame, check that they are oriented properly.

14.Reassemble the drive shaft into the conveyor. Make sure that the bronze washer is in place between the two sections of the shaft. See Figure 4-4.

15.Replace the drive sprockets. Reassemble the belts and master links onto the conveyor.

16.Reinstall the end plugs and conveyor onto the oven.

17.Reattach the drive chains. Replace the chain cover.

18.Check the tension of the conveyor belt as shown in

Figure 2-14 (in Section 2, Installation). The belt should lift about 1″ (25mm). If necessary, adjust the belt tension by turning the conveyor adjustment screws.

19.Replace all components onto the oven.

Figure 4-5. Drive shaft configurations

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Contents Owners Operating and Installation Manual Retain this Manual for Future Reference Middleby Marshall Table of Contents Not Shown DescriptionGeneral Specifications DimensionsRecommended Minimum Clearances Installation Kit Parts List for Series PS640 Electric Oven Installation KIT″ Legs Casters& Top Casters & Top Kit Model PS640 Single Oven Option Base with Legs and Top Model PS640 Double Oven Option Base with Legs and Top Model PS640 Triple Oven Option Base with Outriggers and Top Requirements III. Ventilation SystemRecommendations Other ventilation concernsTop Panel and Base Pad Assembly IV. AssemblyStacking Restraint Cable InstallationDo not Overtighten the Conveyor Belt Conveyor InstallationSwitching Photo Detector Resetting Direction JumperFinal Assembly Conveyor Belt Reversal18. Utility Connection Locations for IV. Electric Supply for Electrically Heated OvensElectric Supply to be Provided by Customer Do not USE Conduit for Ground ConnectionLocation and Description of Controls Main Screen Normal Operation STEP-BY-STEPDaily Shutdown Procedure Daily Startup ProcedureOven Temperature/Set Point/Indicator Screen Quick Reference Touch Screen Controller Main ScreenIII. Quick Reference Troubleshooting Maintenance Daily MaintenanceTop Row Bottom Row II. Maintenance MonthlySplit Belt Disassembly and Cleaning III. Maintenance Every 3 MonthsBlower Belt IV. Maintenance Every 6 MonthsKey Spare Parts Problem Problem Oven does not HeatWiring Diagram 60231 Rev. A4

PS640E specifications

The Middleby Marshall PS640E is a state-of-the-art conveyor oven designed to meet the demands of high-volume food production with efficiency and precision. This innovative oven is widely used in pizzerias, restaurants, and various commercial kitchens, renowned for its ability to deliver consistent and high-quality food results.

One of the main features of the PS640E is its energy-efficient design. Utilizing advanced energy management technology, this oven minimizes energy consumption while maximizing cooking performance. The oven is equipped with a high-performance jet plate system that provides even heat distribution, ensuring that every dish is cooked uniformly. This technology substantially reduces cooking times, allowing operators to serve meals faster without compromising quality.

The PS640E also incorporates advanced temperature controls and an intuitive digital interface, which enable precise temperature adjustments throughout the cooking process. This feature is crucial for achieving optimal results, especially when working with a variety of food items that may require different cooking conditions. The digital controls allow for easy programmability, enabling chefs to create custom cooking profiles tailored to their specific menu items.

Another standout characteristic of the PS640E is its dual belt system. This innovative feature maximizes throughput by allowing different cooking temperatures on each belt, facilitating the preparation of diverse menu items simultaneously. This is especially beneficial in busy kitchen environments where efficiency and speed are crucial.

The oven's robust construction ensures durability and reliability under heavy use, making it a trusted choice for commercial operators. Its stainless-steel exterior not only enhances its aesthetic appeal but also makes it easy to clean and maintain. Furthermore, the PS640E has been designed with ergonomics in mind, promoting ease of use for kitchen staff.

In addition to its core functionalities, the Middleby Marshall PS640E supports a variety of cooking applications, making it a versatile addition to any kitchen. From pizzas and baked goods to roasted meats and vegetables, this oven excels in a wide array of culinary tasks, helping operators diversify their menu offerings.

In conclusion, the Middleby Marshall PS640E stands out in the crowded marketplace of commercial ovens due to its combination of energy efficiency, advanced cooking technologies, and versatile applications. Its robust design, precise controls, and user-friendly interface make it an indispensable tool for chefs and kitchen operators striving for excellence in food preparation.
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