Middleby Marshall PS870G Gas installation manual Gas Burner/Blower Motor and Piping Assembly

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Certain safety code requirements exist for the installation of gas ovens; refer to the beginning of Section 2 for a list of the installation standards. In addition, because a the oven is equipped with casters, the gas line connection shall be made with a connector that complies with the Standard for Connec- tors for Movable Gas Appliances, ANSI Z21.69 (in U.S.A.), as well as a quick-disconnect device that complies with the Standard for Quick-Disconnect Devices for Use With Gas Fuel, ANSI Z21.41 (in U.S.A.).

D. PS870 Propane conversion

Four items have to be changed, to change the oven to LP:

1.Adjust internal burner air shutters.

2.Replace main Orifices

3.Replace (and adjust) the spring in the main valve (see LP kit)

4.Adjust modulating valve bypass settings.

Disconnect the manifold unions closest to the main burner, and remove the manifold assemblies (four screws each). Remove the addition four screws holding the burner cores and slide out each burner core (leaving the ignition and sense wires connected). Adjust the internal air shutters fully open, and replace the cores.

Replace the main orifices on the manifold assemblies with the LP units, and replace the manifold assemblies. Reconnect the unions. Replace the valve spring with the LP spring, and adjust the downstream pressure to get 7″ WC.

Adjust the bypass screws in the side of each modulating valve to approximately 1/6 turn from fully closed. If this setting is too low, the burners will shut off when trying to modulate. If it is too open, the unit will tend to gradually raise up in temperature at standby.

Figure 2-14 - Gas Burner/Blower Motor and Piping Assembly

Gas Burner

Burner/Blower Motor

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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Contents PS870 Series Gas Ovens Page Middleby Marshall Table of Contents Page Page Page QTY Description Page Standoff Installation Switching Photo Detector Resetting Direction JumperConveyor Belt Reversal Reversing the Conveyor BeltConnection PS870 Propane conversion 14 Gas Burner/Blower Motor and Piping AssemblyTemperature Control/Display Conveyor Time SettingMain On/Off Button Temp SetMain Screen on Main ScreenOven Temperature/Set Point/Indicator Screen Daily Shutdown ProcedureQuick Reference Touch Screen Controller Main Screen Energy ModesProblem Solution III. Quick Reference TroubleshootingPage Page Page Blower Belts IV. Maintenance Every 6 MonthsQTY Description

PS870G Gas specifications

The Middleby Marshall PS870G Gas is a high-performance conveyor pizza oven designed to meet the needs of fast-paced restaurant environments. Known for its exceptional cooking capabilities and energy efficiency, the PS870G has gained popularity in the food service industry, especially among pizzerias seeking to enhance their output and quality.

One of the standout features of the PS870G is its advanced gas-fired heating system. This system utilizes a unique design that maximizes heat distribution and minimizes energy consumption. The oven is equipped with high-efficiency burners, which allow for rapid temperature recovery and consistent cooking results. With a cooking temperature range of up to 600°F, it ensures pizzas are baked to perfection, achieving that ideal crispy crust while maintaining a moist interior.

The PS870G also features a patented design that includes a ceramic stone baking surface. This ceramic stone provides excellent heat retention and even cooking, imitating the traditional stone oven pizza baking method. Additionally, it helps absorb moisture from the dough, contributing to a better texture in the final product. The conveyor system is engineered for smooth transitions, allowing pizzas to move seamlessly through the oven, reducing the chances of burnt edges or uneven cooking.

Another significant characteristic of the PS870G is its user-friendly control interface. Operators can easily set precise cooking times and temperatures, enabling consistent results with every batch. The oven also incorporates a digital display that presents real-time data, helping staff monitor cooking processes efficiently. This technology ensures that high volumes of pizzas can be produced quickly without compromising quality.

Moreover, the PS870G is designed with durability and ease of maintenance in mind. The construction includes heavy-duty stainless steel, making it resistant to corrosion and wear over time. The components are accessible, simplifying routine maintenance tasks and ensuring the oven remains in optimal working condition.

Overall, the Middleby Marshall PS870G Gas is an exceptional choice for any establishment that prides itself on quick service and high-quality pizza. With its innovative technologies, high efficiency, and robust construction, this oven stands out as a benchmark in the commercial cooking equipment market, catering to the demands of modern kitchens. Its ability to deliver top-notch results consistently makes it a preferred solution for pizza operators looking to elevate their culinary offerings.
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