II. Maintenance Monthly | Middleby Marshall PS640 specs

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.

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

PS640 specifications

The Middleby Marshall PS640 is an industry-leading conveyor oven designed to meet the demands of commercial kitchens, particularly in pizza and other high-volume food applications. This oven combines advanced technologies with robust design, ensuring that users achieve consistent, high-quality results while optimizing operational efficiency.

One of the standout features of the PS640 is its unique design, which includes a patented jet impingement technology. This technology significantly enhances the cooking efficiency by using high-velocity hot air to cook food evenly and quickly. This not only reduces cooking times but also helps retain moisture and flavor, resulting in a superior product that delights customers.

Another key characteristic of the PS640 is its dual-mode operation. The oven can be configured for either high-speed cooking or traditional baking modes, making it versatile enough to handle a wide variety of menu items. This flexibility allows operators to maximize their kitchen space and adapt to changing customer demands effortlessly.

The PS640 also boasts a fully insulated cooking chamber, which ensures consistent cooking temperatures and minimizes energy loss. This thermal efficiency not only contributes to food quality but also helps reduce operational costs, making it an economically viable option for restaurants and foodservice operations.

Further enhancing its user-friendliness, the PS640 features an intuitive digital control panel. This allows staff to easily set cooking times and temperatures, monitor performance, and make adjustments as necessary. Additionally, the oven includes programmable cooking settings, making it easy to replicate popular dishes quickly and ensuring consistency across multiple shifts.

Durability is another hallmark of the PS640. Constructed with high-quality materials, this oven is built to withstand the rigors of a busy kitchen environment. Its stainless-steel exterior not only gives it a sleek look but also makes it easy to clean and maintain.

In summary, the Middleby Marshall PS640 is a state-of-the-art conveyor oven that excels in speed, efficiency, and versatility. Its advanced technologies, user-friendly features, and robust construction make it an ideal choice for foodservice operators looking to elevate their cooking capabilities and enhance their menu offerings. Whether for quick-service restaurants, pizzerias, or catering operations, the PS640 delivers outstanding results with every use, ensuring satisfied customers and a thriving business.