II. Maintenance Monthly | Middleby Marshall PS640E guide

II. MAINTENANCE – MONTHLY

NOTE: When removing the conveyor, refer to Figure 2-12 (in Section 2, Installation).

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

B.Remove the crumb trays from the oven.

C.Lift the drive end of the conveyor slightly, and push it forward into the oven. This removes the tension from the drive chain. Then, remove the drive chain from the con- veyor sprocket.

D.Slide the conveyor out of the oven, folding it as it is removed.

NOTE: Split belt conveyors can only be removed from the end of the oven with the drive motor.

Single-belt conveyor assemblies may be removed from either end of the oven. If it is to be removed from the end of the oven without drive motor, remove the drive motor sprocket as described in the Conveyor Installation instructions (in Section 2, Installation).

E.Remove the end plugs from the oven. The end plugs are shown in Figure 1-1 (in Section 1, Description).

F.Slide the air fingers and blank plates out of the oven, as shown in Figure 4-2. AS EACH FINGER OR PLATE IS REMOVED, WRITE A “LOCATION CODE” ON IT WITH A MARKER to make sure that it can be reinstalled correctly.

Example of markings:

(Top Row)	T1	T2	T3	T4	T5	T6
(Bottom Row)	B1	B2	B3	B4	B5	B6

G.Disassemble the air fingers as shown in Figure 4-3. AS EACH FINGERISDISASSEMBLED,WRITETHE“LOCATIONCODE” FOR THE FINGER ON ALL THREE OF ITS PIECES. This will help you in correctly reassembling the air fingers.

CAUTION: Incorrect reassembly of the air fingers will change

the baking properties of the oven.

H.Clean the air finger components and the interior of the baking chamber using a vacuum cleaner and a damp cloth. Refer to the boxed warnings at the beginning of this Section for cleaning precautions.

I.Reassemble the air fingers. Then, replace them in the oven, using the “location guide” as a guide.

J.Replace the end plugs on the oven.

K.Reassemble the conveyor into the oven. If the drive sprocket was removed when installing the conveyor, replace it at this time.

L.Reattach the drive chain.

M.Check the tension of the conveyor belt as shown in Figure

2-14 (in Section 2, Installation). The belt should lift between 3 - 4″ (75-100mm). DO NOT OVERTIGHTEN THE CONVEYOR BELT. If necessary, the belt tension can be adjusted by turning the conveyor adjustment screws, located at the idler (right) end of the conveyor.

N.Replace the crumb trays.

Figure 4-2. Removing Air Fingers and Plates

Figure 4-3. Disassembling the Air Fingers

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.