II. Maintenance Monthly | Middleby Marshall PS840 Series 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

PS840 Series specifications

The Middleby Marshall PS840 Series is a high-performance conveyor oven designed to deliver outstanding cooking results with efficiency and speed. This series is renowned in the foodservice industry for its advanced technology and user-friendly design, making it an ideal choice for restaurants, pizza shops, and other commercial kitchens that require consistent high-quality food production.

One of the standout features of the PS840 Series is its innovative design that utilizes a patented Cookstar Technology. This technology promotes even cooking by ensuring that hot air circulates consistently throughout the oven chamber. The result is perfectly baked pizzas, evenly cooked dishes, and enhanced flavor, making it a favorite among chefs and kitchen staff alike.

The PS840 offers a variable-speed conveyor system that allows users to adjust cooking times according to the specific requirements of different food items. This flexibility enables operators to achieve precise results, whether they are baking thin-crust pizzas or roasting vegetables. Additionally, the oven reaches optimal cooking temperatures quickly, minimizing wait times during peak service hours.

Energy efficiency is another key characteristic of the Middleby Marshall PS840 Series. Built with high-quality insulation and advanced heating elements, this series is designed to significantly reduce energy consumption while maintaining performance. This not only lowers operational costs but also supports sustainable practices in the foodservice industry.

The PS840 Series includes a user-friendly digital control panel that makes it easy for operators to set cooking times and temperatures, monitor performance, and switch between cooking modes. This intuitive interface reduces the learning curve for new staff and enhances overall productivity in busy kitchens.

Another notable feature of the PS840 Series is its durability. Constructed with robust materials, this oven is designed to withstand the wear and tear of a commercial kitchen environment. Its easy-to-clean surfaces and removable conveyor belt further enhance its maintenance convenience, allowing kitchens to maintain high hygiene standards with ease.

In summary, the Middleby Marshall PS840 Series stands out in the market for its exceptional cooking performance, energy efficiency, user-friendly controls, and robust design. These features make it a versatile and reliable choice for any establishment looking to enhance their food production capabilities while delivering quality dishes consistently. Whether utilized for baking, roasting, or reheating, the PS840 Series excels in meeting the demands of the modern foodservice industry.