SECTION 3

OPERATION

II. COMPONENT INFORMATION AND LOCATION

Blower

Fan Motor

Door Safety

Switch

Figure 3-2

Conveyor

Speed

Control

A. Door Safety Switch

The Door Safety Switch is located at upper left hand side of control cabinet. Opening the control cabinet door will permit the switch to open, disconnecting power to all electrical controls.

CAUTION: DO NOT TOUCH WIRES GOING TO THIS SWITCH AS CURRENT IS ALWAYS PRESENT.

B. Blower Fan

The blower switch located on the control box has

two positions. The switch must be on (I) for the burner and conveyor to come on and permit the oven to warm up. The fan circulates the air throughout the oven and must stay on during baking and during the cool down cycle above 200° F. (93°C.) to prevent blower bearing dam- age. To protect the blower motor and bearings a thermo- static override is built into the oven. If the temperature inside the oven is over 180° F. (82° C.) the main blower and conveyor will continue to run even when the blower

switch is turned to the off position.

An air pressure switch monitors the air flow from the main blower, this acts as a safety interlock for the burner. The heat will not come on if the air switch does not sense air flow off the main blower fan.

C. Heat (Gas ovens only)

Turning the heat switch to on (I) will initially set up the

oven purge circuit after approximately 30 seconds the pilot will light. After the pilot is lit the main control valve will open permitting gas to go to the burner and heat the oven.

This switch is in series with the burner blower motor centrifugal switch, high temperature safety switch and blower fan air pressure switch. All three safety switches must be closed for gas to flow and the burner to light.

D. Temperature Controller

The temperature controller located on the control box is a solid state on/off type which is used to maintain the desired set temperature. The temperature controller

continuously monitors the oven temperature and turns high flame solenoid valve on in gas heated ovens. The heat is on for the time required to maintain a constant temperature.

The temperature controller contains a Hi-Limit switch which will shut down the oven when the oven reaches 650°F. (343° C.) and a low-limit switch which allows the oven to cool down to 180°F. (82° C.) before shutting off the blowers.

E. Heat (Electrically heated ovens only)

Turning the heat switch located on the control box

to on (I) will energize the electric heating system. This switch is in series with the blower fan motor centrifugal switch and high temperature override switch. Both switches must be closed before the elements may be energized.

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Middleby Marshall PS200-R68 installation manual II. Component Information and Location
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PS200-R68 specifications

The Middleby Marshall PS200-R68 is an innovative commercial conveyor oven that has set new standards in the foodservice industry. Known for its exceptional performance and versatility, this high-efficiency oven is particularly popular among pizza restaurants, fast-casual dining establishments, and any operation that requires high-volume cooking.

One of the standout features of the PS200-R68 is its advanced cooking technology. It utilizes Middleby Marshall's patented "Digital Edge Technology," which ensures precise heat distribution and consistent cooking results. This technology optimizes the airflow within the oven, allowing for uniform cooking across various food products. From pizzas to baked goods, the PS200-R68 can handle it all with ease.

The PS200-R68 boasts a robust construction designed for the demands of a commercial kitchen. It features a stainless-steel exterior, which not only enhances durability but also offers an appealing aesthetic suitable for front-of-house applications. The interior of the oven is equipped with durable, easy-to-clean materials that ensure hygiene and compliance with food safety standards.

Another key characteristic of the PS200-R68 is its energy efficiency. The oven is engineered to minimize energy consumption without compromising performance. Its advanced insulation helps maintain consistent temperatures, thereby reducing heat loss during operation. This feature significantly lowers operational costs, making the PS200-R68 an economical choice for businesses.

Additionally, the PS200-R68 comes with user-friendly digital controls that offer precise temperature settings and cooking times. Operators can easily customize cooking programs to achieve desired results, increasing operational efficiency. With its high-speed conveyor system, the oven ensures quick cooking times, allowing operators to meet high-demand periods without delays.

Furthermore, the Middleby Marshall PS200-R68 is designed to accommodate a variety of food types. Its adjustable conveyor speed allows for flexible cooking times, enabling operators to cook everything from perfectly baked pizzas to toasted sandwiches. This versatility makes it an invaluable addition to any commercial kitchen.

In summary, the Middleby Marshall PS200-R68 is a cutting-edge conveyor oven designed for high performance and energy efficiency. With its digital edge technology, durable construction, and versatile cooking capabilities, it is the ideal choice for foodservice operators looking to enhance their menu offerings while maintaining operational efficiency.
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