Mount the new reflector bracket to the provided holes on the front right-hand side of the oven. The reflector should be positioned just above the conveyor belt.

Using an assistant, hold both back cover switches in the closed position. This will allow power to the photo-eye, and it will provide a red beam for aiming. Loosen one of the screws holding the photo detector gimbal tight, allowing it to be reaimed at the reflector. The beam should hit exactly in the center of the reflector, then tighten the screw back down.

Note: This is MUCH easier in reduced light.

Replace all covers.

CONVEYOR BELT REVERSAL

Conveyor belt reversal consists of four steps:

1.Physically reversing the conveyor belt.

2.Moving the lower thermocouple.

3.Resetting direction jumper on the conveyor control board.

4.Switching the photo detector.

REVERSING THE CONVEYOR BELT

Remove the conveyor from the oven and find the master link location. Remove master links and remove the belt from the conveyor frame. Reassemble the belt back onto the frame (in the reverse direction) and reinstall the master links. Replace the conveyor assembly in the oven.

MOVING THE LOWER THERMOCOUPLE

The lower thermocouple needs to be moved from the lower outer most hole to the opposite side lower outer most hole. The thermocouple electrical connection needs to be moved as well. Insert the thermocouple (TC2) into the thermocouple hole left open by the removal of the coverplate. Secure the thermocouple (TC2 and rename TC3) with the two (2) 6-32 screws that were removed previously. Secure the coverplate with the two (2) 6-32 screws over the hole where the thermo- couple (TC2) was removed.

RESETTING DIRECTION JUMPER

Locate Jumper P1 on the conveyor control board. Move jumper from terminals 1 and 2, and replace onto terminals 2 and 3.

SWITCHING PHOTO DETECTOR

Remove both rear fan belt covers, then remove the motor cover assembly from both sides of the oven. The photo eye is located on the front side of the left motor bracket. Disconnect the three connecting wires, noting which color wires assemble to the associated wires on the photo-detector. Remove the entire photo detector bracket. Replace the assembly to the right- hand side of the unit, mirroring the way it was assembled on the left. Reconnect the detector wiring in the same order it was on the left.

Incoming electrical power lines are fed through the strain- relief fitting, shown in Figure 2-12. The electrical supply connections are made inside the electrical junction box. The power lines then connect to the oven circuits through safety switches located inside the machinery compartment and each blower motor compartment. These switches interrupt electrical power to the oven when the Machinery Compart- ment Access Panel is opened, OR when either of the blower or rear shrouds is removed.

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Middleby Marshall PS870G Gas Conveyor Belt Reversal, Reversing the Conveyor Belt, Moving the Lower Thermocouple
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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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