Middleby Marshall PS740E installation manual IV. Electric Supply for Electrically Heated Ovens

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III.ELECTRICAL CONNECTION INFORMATION FOR PS740E-SERIES OVENS.

WARNING

Authorized supplier personnel normally accomplish the connections for the ventilation system, electric supply, as arranged by the customer. Following these connections, the factory-authorized installer can perform the initial startup of the oven.

Check the oven data plate (Figure 2-17) before making any electric supply connections. Electric supply connections must agree with data on the oven data plate.

NOTE: The electric supply installation must satisfy the require- ments of the appropriate statutory authority, such as the Na- tional Electrical Code (NEC), ANSI/NFPA70, (U.S.A.); the Canadian Electrical Code, CSA C22.2; the Australian Code AG601; or other applicable regulations.

A fused disconnect switch or a main circuit breaker (customer furnished) MUST be installed in the electric supply line for each oven; it is recommended that this switch/ circuit breaker have lockout/tagout capability. The electric supply connection must meet all national and local electrical code requirements. Cop- per is the recommended material for the electrical supply conductors.

IV. ELECTRIC SUPPLY FOR ELECTRICALLY HEATED OVENS

Power requirements for electrically heated ovens are usually 208 - 240VAC, 3-phase, 4-wire (3 ‘hot’, 1 ground), although ovens built for export can have power requirements of 380VAC and 480VAC. (These ovens have a 5-wire system.) A 2″ (51mm) diameter cutout/hole in the back of the machinery compartment provides access for the electrical supply connec- tions. Using flexible cable(s) for the electrical power supply conductors requires a 2″ (51mm) strain-relief fitting (not fur- nished) to enable safe access to the terminal block from which oven power is distributed.

The supply conductors must be of the size and material (copper) recommended to provide the current required; (refer to the data plate for the ampere specifications). The electric current rating for each conductor supplying a PS740E-Series Oven must comply to local and national codes.

Typical specifications for each PS740E-Series Oven are 208V or 240V, 3-phase, 4-wire, 60-ampere, 34.4kW. A PS740E-Series Double Oven (Figure 1-2) installation would require two 60-ampere service connections, one for each oven; the 34.4kW power consumption also doubles for such an installation to 68.8kW.

The 208V or 240VAC electrically heated oven uses two legs of the supplied power to provide 208V or 240VAC power for the oven control circuitry.

Electrical Junction Box

(One per oven cavity)

 

Figure 2-18. Utility Connection Locations for

Figure 2-17. Typical Electric Oven Data Plate

Electric Ovens

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Contents Owners Operating and Installation Manual Retain this Manual for Future Reference Middleby Marshall Table of Contents Machinery Compartment Access Panel Allows access Conveyor Drive Motor Moves the conveyorNot Shown Oven Specifications Installation Parts List for Series PS740 Electric Oven Installation KIT Kit″ Legs Casters& Top Casters & Top Kit PS740 Oven Installation Required Kits and Equipment Item no QTY Description Hardware BA G ″-16 × 1 HEX SCREW, SST Item no QTY Description Quad Outrigger Weldment 7A2S15 SCR, MS STR Trshd 10-32X3/4 ″ 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 II. Normal Operation STEP-BY-STEP Screen Alerts III. Quick Reference TroubleshootingMaintenance Daily MaintenanceTop Row Bottom Row II. Maintenance MonthlySplit Belt Disassembly and Cleaning III. Maintenance Every 3 MonthsBlower Belt IV. Maintenance Every 6 MonthsItem QTY Description KEY Spare Parts Available separately. See FigureProblem Problem Oven does not HeatWiring Diagram 60741 Rev. F Page

PS740E specifications

The Middleby Marshall PS740E is a cutting-edge conveyor oven designed to provide exceptional baking performance, particularly in high-volume food service operations. This innovative piece of equipment is particularly favored by pizza restaurants, quick-service eateries, and other establishments that require reliable and consistent cooking results.

One of the standout features of the PS740E is its advanced cooking technology. Equipped with the patented "Jetlube" system, the oven utilizes high-velocity forced air that enhances heat transfer and ensures even cooking across the product. This technology not only cooks food quickly but also preserves the flavor and texture of items, making it a preferred choice for commercial kitchens focused on quality.

The PS740E is built with an energy-efficient design that promotes sustainability while reducing operational costs. It features an electronic control system that allows operators to easily manage cooking times and temperatures, thereby enhancing productivity without sacrificing food quality. With adjustable conveyor speeds and temperature controls that can reach up to 600°F, the oven provides versatility in cooking a variety of menu items, including pizzas, sandwiches, and baked goods.

Another notable characteristic of the Middleby Marshall PS740E is its durable construction. Designed for the rigors of commercial use, it features stainless steel exteriors, which not only present a professional appearance but also ensure easy cleaning and maintenance. The oven's high-quality components are engineered to withstand the demands of daily use, further reinforcing its reputation as a reliable workhorse in any kitchen.

The PS740E is also designed with user convenience in mind. It is compact yet capable of accommodating large volumes of food, thanks to its efficient conveyor system. This allows for streamlined workflow in busy environments, minimizing wait times and enhancing customer satisfaction.

In conclusion, the Middleby Marshall PS740E stands out in the market for its innovative cooking technologies, energy efficiency, durable design, and user-friendly features. It represents a smart investment for food service operators looking to enhance their menu offerings while maintaining efficiency in food preparation and cooking processes.
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