Figure 78
Fan shroud removed

4.Heater specifications

•PS200-series electric ovens use six individual heat- ing elements.

•208V elements are used for ovens with a 208V supply.

•240 volt elements are used for ovens with a 220, 230 or 240V supply. 240V elements are also used on ovens with a 416V or 480V supply (connected in se- ries).

•380V elements are used for ovens with a 380V supply.

•All heaters are connected in Delta.

•Each heating element is stainless clad and has a 3”/76mm cold (unheated) end next to the connect- ing leg.

•Individual element electrical data

Volts

Watts

Ohms

Connection

208V

4500W

9.6W

Parallel

220V

3781W

12.8W

Parallel

230V

4133W

12.8W

Parallel

240V

4500W

12.8W

Parallel

380V

4500W

32.2W

Parallel

416V

3380W

12.8W

Series

480V

4500W

12.8W

Series

5.Checking the Heating Elements

The most common problems encountered with electric heaters are:

•Open or bad connections.

•Open, shorted or grounded heating elements.

To troubleshoot the heating elements, disconnect all leads at the back wall and check each element with a digital multimeter set to Ohms (W). Correct ratings are shown in the table in the preceding section. Zero read- ing on the ohm scale indicates an open or shorted ele- ment.

SECTION 3 - SERVICING COMPONENTS

It is also possible to check for an open element using an ampmeter. Any current through the element indi- cates that the element is not open.

6.Changing Heating Elements

NOTE: Wires going from the mercury contactor (or solid state relays, as appropriate) to the heating ele- ments are rated at #12 gauge TAGT, 482°F/250°C. DO NOT, under any circumstances, use a wire of lesser rating or quality.

NOTE: All lugs and connections are rated at 600°F/ 316°C. All heating element connections are double- nutted.

To remove the element:

•Remove the blower belt.

•Remove the 12 electrical lead connections to the heaters at the back wall.

•Remove the 12 bolts that hold the rear oven panel to the body. Once removed, DO NOT lay the panel on either its front or back side. This can damage the heating elements and blower fan. The panel should be kept upright as shown in Figure 78.

•Remove the fan shroud.

•Remove the screws at both ends of the element and pull the element straight out. See Figure 79.

•When replacing the rear oven panel, be sure to use a high-temperature never-seize lubricant on the 12 bolts that hold the panel in place.

Figure 79

Removing elements

Mounting s c r e w s

141

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Middleby Marshall PS220, PS570, PS360, PS200, PS555, PS224 PS310 Removing elements, 141, Individual element electrical data
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PS224 PS310, PS220, PS555, PS200, PS360 specifications

The Middleby Marshall PS555 is a standout commercial pizza oven renowned for its performance, efficiency, and advanced technologies. Designed with the modern pizzeria in mind, the PS555 delivers exceptional cooking results while maximizing energy efficiency and throughput.

One of the key features of the PS555 is its innovative cooking technology, which incorporates both convection and radiant heat. This unique combination ensures that pizzas are cooked evenly and quickly, achieving a perfectly crispy crust and evenly melted cheese every time. The oven’s high-speed air impingement system accelerates cooking times, allowing pizzerias to serve more customers in less time without compromising quality.

The PS555 is designed with a spacious cooking chamber that can accommodate multiple pizzas simultaneously. With its ability to fit pizzas up to 18 inches in diameter, the oven is ideal for establishments with high demand. Additionally, the adjustable conveyor speed allows operators to customize the cooking time based on their specific menu items, enhancing versatility and productivity.

Energy efficiency is a hallmark of the Middleby Marshall PS555. The oven utilizes advanced insulation materials to minimize heat loss, ensuring that it operates at optimal temperatures while consuming less energy. This efficiency not only reduces operating costs but also contributes to a more sustainable kitchen environment.

User-friendly controls make it simple for operators to manage the cooking process. The PS555 features digital controls with programmable settings, enabling quick adjustments to temperature and cooking time. This ensures consistent quality across different shifts and helps maintain product standards while simplifying staff training.

Durability is another defining characteristic of the PS555. Built with high-quality materials, the oven is designed for heavy use in busy commercial kitchens. Its stainless steel construction ensures resistance to wear and tear, making it a worthwhile investment for any pizzeria.

In summary, the Middleby Marshall PS555 pizza oven is a high-performance piece of equipment that combines advanced cooking technologies, efficiency, and durability. Its ability to deliver consistently excellent results while streamlining operations makes it an essential asset for any pizza business aiming to enhance its productivity and customer satisfaction.
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