Middleby Marshall PS640 installation manual IV. Maintenance Every 6 Months, Blower Belt

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Figure 4-6. Disassembling the drive shaft

Figure 4-7. Rear panel access

Bearings

(2 total)

Remove eight (8) screws to remove rear panel

Blower belt

Blower motor

E. Blower Belt

1.Remove the six screws shown in Figure 4-7. Then, remove the rear panel from the oven.

2.Check the blower belt for the proper 1/4″ (6mm) deflec- tion at the center, and for cracking or excessive wear.

See Figure 4-7. Overtightening the belt will cause premature bearing failure and possible vibrations. A loose belt may also cause vibrations.

3.If necessary, adjust the tension of the belt by loosening

the four motor mounting bolts. Reposition the motor as neccessary until the correct 1/4″ (6mm) deflection is reached, then tighten the bolts.

Loosen four (4) screws to adjust motor position and belt tension

IV. MAINTENANCE - EVERY 6 MONTHS

A.Check that the oven is cool and the power is discon- nected, as described in the warning at the beginning of this Section.

B.Check for excessive wear on the conveyor drive motor

brushes. The brushes should be replaced if they have worn to less than 1/4″ (6mm) in length. Be sure to replace the brushes in exactly the same position.

C.For gas ovens, inspect and clean the burner nozzle and the spark electrode assembly.

D.Check the conveyor drive shaft bushings and spacers. Replace the components if they are worn.

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Contents Owners Operating and Installation Manual Retain this Manual for Future Reference Middleby Marshall Table of Contents Description Oven UsesOven Specifications Triple OveInstallation PS640 24″ Oven Installation Required Kits and Equipment Parts List for Series PS640 GAS Oven Installation KITKit PS640 32″ Oven Installation Required Kits and Equipment ″ Legs Casters& Top Casters & Top Kit N61033 N59720 N59725Item no QTY Description Hardware BA G ″-16 × 1 HEX SCREW, SST Item no QTY Description Quad Outrigger Weldment A27727 83 -16x1-1/4 HEX Bolt A21924 Recommendations III. Ventilation SystemRequirements Other ventilation concernsIV. Assembly Top Panel and Base Pad AssemblyRestraint Cable Installation StackingConveyor Installation Do not Overtighten the Conveyor BeltConveyor Belt Reversal Resetting Direction JumperSwitching Photo Detector Reversing the Conveyor BeltConnection VII. GAS SupplyGas Conversion Adjusting the Maximum Pressure SettingConnection PS640 Propane ConversionAdjusting the Minimum Pressure Setting MaintenanceCheckout Location and Description of Controls II. Normal Operation STEP-BY-STEP III. Quick Reference Troubleshooting Screen AlertsMaintenance Maintenance DailyII. Maintenance Monthly Top Row Bottom RowIII. Maintenance Every 3 Months Split Belt Disassembly and CleaningIV. Maintenance Every 6 Months Blower BeltKEY Spare Parts PS640 GAS KEY Spare Parts Available separately. See FigureWiring Diagram Page Page

PS640 specifications

The Middleby Marshall PS640 is an industry-leading conveyor oven designed to meet the demands of commercial kitchens, particularly in pizza and other high-volume food applications. This oven combines advanced technologies with robust design, ensuring that users achieve consistent, high-quality results while optimizing operational efficiency.

One of the standout features of the PS640 is its unique design, which includes a patented jet impingement technology. This technology significantly enhances the cooking efficiency by using high-velocity hot air to cook food evenly and quickly. This not only reduces cooking times but also helps retain moisture and flavor, resulting in a superior product that delights customers.

Another key characteristic of the PS640 is its dual-mode operation. The oven can be configured for either high-speed cooking or traditional baking modes, making it versatile enough to handle a wide variety of menu items. This flexibility allows operators to maximize their kitchen space and adapt to changing customer demands effortlessly.

The PS640 also boasts a fully insulated cooking chamber, which ensures consistent cooking temperatures and minimizes energy loss. This thermal efficiency not only contributes to food quality but also helps reduce operational costs, making it an economically viable option for restaurants and foodservice operations.

Further enhancing its user-friendliness, the PS640 features an intuitive digital control panel. This allows staff to easily set cooking times and temperatures, monitor performance, and make adjustments as necessary. Additionally, the oven includes programmable cooking settings, making it easy to replicate popular dishes quickly and ensuring consistency across multiple shifts.

Durability is another hallmark of the PS640. Constructed with high-quality materials, this oven is built to withstand the rigors of a busy kitchen environment. Its stainless-steel exterior not only gives it a sleek look but also makes it easy to clean and maintain.

In summary, the Middleby Marshall PS640 is a state-of-the-art conveyor oven that excels in speed, efficiency, and versatility. Its advanced technologies, user-friendly features, and robust construction make it an ideal choice for foodservice operators looking to elevate their cooking capabilities and enhance their menu offerings. Whether for quick-service restaurants, pizzerias, or catering operations, the PS640 delivers outstanding results with every use, ensuring satisfied customers and a thriving business.