Middleby Cooking Systems Group PS520E Door Safety Switch, Blower Switch, Heat Switch

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SECTION 3

OPERATION

II.COMPONENT INFORMATION AND LOCATION (Figures 3-1 and 3-2)

A. Door Safety Switch

The Door Safety Switch is located at the lower right side of the control panel opening. Opening the control panel door permits this switch to open, disconnecting power to all electrical controls.

CAUTION

Do NOT touch the wires going to this safety switch. Current is always present.

B. Blower Switch

The blower switch has two positions. The switch must be “ON” or “I” for the main blowers to come on and permit the oven to run. The fan circulates the air throughout the oven and must stay on during baking and during the cool down cycle above 2000F (930C) to prevent blower bearing damage. To protect the blower motor and bearings a thermostatic override is built into the oven.

Temperature

Controller

If the temperature of the oven is over 2000F (930C) the main blower will continue to run after the blower switch is turned to the “OFF” or “O” position.

C. Heat Switch

Turning the HEAT switch to “ON” or “I” will energize the electric heating system. This switch is in series with the blower fan motor and high temperature override switch. Both switches must be closed before the heating elements can be energized.

D. Temperature Controller

The temperature controller is a solid-state, PID type to maintain the operator-set temperature. 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 consistent oven temperature.

The temperature controller contains a low-limit switch which allows the oven to cool down to 2000F (930C) before shutting off the blower. A high-limit indication (ALM1) will appear on the display if the oven reaches 6500F (3430C).

Door Safety

Switch

Conveyor Speed

Conveyor Speed

Conveyor

Digital Control

Control Module

Drive Motor

Figure 3-2. Interior View of Control Console

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Contents Installation Page A. Only IiiTable of Contents Section Description Model IdentificationPS520 Series Oven Specifications This Manual Must Be Kept For Future ReferenceII. Component Function Section Installation UnloadingInstallation KIT Single and Double Stack OvensModel PS520 Single Oven Dimensions II. Ventilation IV. Electric Supply for Electrically Heated Ovens 11. Junction Connection BoxSection Operation Control FunctionsHeat Switch Door Safety SwitchBlower Switch Temperature ControllerSee -4 Measuring Conveyor SpeedConveyor Shutdown Procedure Start-up Procedure Daily Start-upPower Failure III. STEP-BY-STEP OperationIV. Normal Operation STEP-BY-STEP Daily Start-up ProcedureDaily Shutdown Procedure Overtemp Quick Reference Troubleshooting SymptomSection Maintenance Important Note Maintenance DailyExterior Conveyor Belt FigureRemoving Conveyor From Oven For Cleaning II. Maintenance MonthlyPrecautions Part#QuantitySection Maintenance Air Fingers Disassembly For cleaning Standard FingersReassembly of Air Fingers 12. Standard Lower FingerExtended Lip Tab on Outer Plate Flange Finger Manifold Reinstall End Plugs Conveyor Reassembly Into Oven Checking Conveyor Belt TensionConveyor Belt Link Removal Attaching Drive Chain Electrical Terminals III. Maintenance Every 3 MonthsIV. Maintenance Every 6 Months VentilationPS520-SERIES Electric Oven KEY Spare Parts KIT Description QuantitySection Troubleshooting E208-240V 50/60/1 E380-480V 50/60/1 E230-240V CE, 1Ph E380-400V CE, 1Ph E380-400V CE, 3Ph

PS520E specifications

The Middleby Cooking Systems Group PS520E is a remarkable addition to the commercial cooking equipment market, designed to meet the high demands of operational efficiency and cooking quality. This advanced piece of equipment is engineered for high-volume operations, particularly in busy restaurants and foodservice environments.

One of the standout features of the PS520E is its innovative cooking technology, utilizing a unique blend of infrared and convection cooking methods. This combination ensures rapid cooking times while preserving the moisture and flavor of the food. The enhanced heat transfer capabilities significantly reduce cooking durations, making it ideal for establishments with a high turnover rate.

The PS520E boasts an impressive cooking capacity, able to handle multiple menu items simultaneously without compromising on cooking consistency or quality. This is particularly advantageous for establishments that require versatility in their cooking processes, as it can accommodate a wide range of products, from meats and seafood to vegetables and baked goods.

Another significant characteristic of the PS520E is its user-friendly interface. It features an intuitive digital touchscreen that allows operators to easily navigate through various cooking programs and settings. This ease of use is essential in fast-paced environments, enabling staff to focus on service rather than complicated machinery.

The design of the PS520E also takes into account the importance of energy efficiency. With advanced insulation and heating elements, this cooking system minimizes energy consumption while maximizing output. This not only contributes to lower operational costs but also supports sustainability initiatives within the foodservice industry.

In terms of maintenance, the PS520E includes features that simplify cleaning and upkeep. Removable parts and a streamlined design make it easy to clean, ensuring that hygiene standards are consistently met. Furthermore, its durable construction is designed to withstand the rigors of a commercial kitchen, promising longevity and reliability.

Finally, the Middleby Cooking Systems Group PS520E is built with safety in mind, featuring automatic shut-off systems and safety interlocks that protect operators from potential hazards. This enhances the safety profile of the equipment, reassuring operators and managers alike.

In conclusion, the PS520E represents a perfect blend of innovation, efficiency, and reliability. With its advanced cooking technologies, user-friendly design, and emphasis on energy efficiency and safety, it is positioned to be an invaluable asset for any high-volume kitchen. Whether for restaurants, cafeterias, or catering services, the PS520E stands ready to deliver outstanding cooking performance in a modern culinary landscape.
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