SECTION 3 - SERVICING COMPONENTS

C. Component Identification

1.Burner type

Middleby ovens are equipped with one of two main burner designs. Details of these burners are provided below.

1.Midco burner - see Figure 61. This burner was used on PS360WB70 and PS360EWB ovens only.

Late-production PS360EWB and PS360WB70 ov- ens used the Wayne burner shown in Figure 62. In addition, many PS360EWB ovens were retrofitted during 1998 to use the Wayne burner.

Servicing the Midco burner is beyond the scope of this manual. However, note that most gas train components EXCEPT FOR THE BURNER ITSELF are identical to the components used with the Wayne burner. If necessary, contact Middleby Tech- nical Service for assistance.

2.Wayne burner - see Figure 62. Wayne burners are used on all Middleby oven models except early- production PS360WB70 and PS360EWB models.

The Wayne burner configuration varies slightly be- tween oven models and so may be slightly differ- ent from that shown in Figure 62. Refer to the drawings in Part Number Reference - Burner Com- ponents (pages 88-90) for illustrations of the burner configuration used on each oven model. Common variants include:

•Flexible air tube between the burner blower and plenum. Used on all PS555/570 series ovens.

•120V burner blower motor. Used on PS200- series (through 3/02), PS310, PS314, PS360, PS360WB and PS570S ovens.

•208/240V line voltage blower motor. Used on PS200-series (4/02 or later), PS360WB70, PS360EWB, PS555, and PS570G ovens.

1.Solenoid valve vs. Modulating valve

Middleby ovens use one of the following systems for gas flow regulation:

•On-Off gas flow regulation. These ovens are equipped with a high flame solenoid valve. The solenoid valve can only be positioned fully open (100% gas flow) or fully closed (0% gas flow) as necessary to maintain the set point. A bypass line supplies gas to maintain the flame when the valve is closed. On/off gas systems have a temperature “swing” of several degrees on either side of the set point.

On-Off gas flow regulation is used on the following Middleby oven models:

-

PS200-series

-

PS360WB

 

(through 3/02)

-

PS360WB70

-

PS310

-

PS570S

-

PS314

 

(through 8/00)

-PS360

Additional information on the solenoid valve is pro- vided in Solenoid Valve on Page 96.

•Modulated gas regulation. These ovens are equipped with a modulating gas valve. The modu- lating valve can open or close at any setting from 0- 100% gas flow in response to the need for heat to maintain the set point. Because of this flexibility, the temperature “swing” is eliminated.

The modulated gas system is used on the following Middleby oven models:

-

PS200-series

-

PS570S

 

(4/02 or later)

 

(9/00 or later)

-

PS360EWB

-

PS570G

-PS555

Additional information on the modulating valve is provided in Modulating Valve on Page 97.

Figure 61 - Midco burner

Figure 62 - Wayne burner

Burner blower

PS360EWB shown. For different oven models, refer

to the drawings on pages 88-90.

 

Air

shutterPlenum Burner Air shutter blower

Main gas

line

Main gas

Burner

blower

line

motor

 

 

Plenum

 

 

 

Burner

 

Pilot line

blower

Pilot line

motor

 

92

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Image 93
Middleby Marshall PS555, PS570, PS360, PS200 manual Component Identification, Burner type, Solenoid valve vs. Modulating valve
Page 92 Page 94

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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