Middleby Marshall PS840 Series installation manual IV. Maintenance Every 6 Months, Blower Belt

Page 30

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.

26

Image 30

Contents Owners Operating and Installation Manual Retain this Manual for Future Reference Middleby Marshall Table of Contents Description Oven UsesOven Specifications Triple OveInstallation PS840 24″ Oven Installation Required Kits and Equipment Parts List for Series PS840 GAS Oven Installation KITKit PS840 32″ Oven Installation Required Kits and Equipment Kit 15 ″ Legs Casters& Top Casters & TopItem no QTY Description Hard Ware BA G ″-16 × 1 HEX SCREW, SST Item no QTY Description Quad Outrigger Weldment Item no QTY Description 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 PS840 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 PS840 GAS KEY Spare Parts Available separately. See FigureWiring Diagram Page Page

PS840 Series specifications

The Middleby Marshall PS840 Series is a high-performance conveyor oven designed to deliver outstanding cooking results with efficiency and speed. This series is renowned in the foodservice industry for its advanced technology and user-friendly design, making it an ideal choice for restaurants, pizza shops, and other commercial kitchens that require consistent high-quality food production.

One of the standout features of the PS840 Series is its innovative design that utilizes a patented Cookstar Technology. This technology promotes even cooking by ensuring that hot air circulates consistently throughout the oven chamber. The result is perfectly baked pizzas, evenly cooked dishes, and enhanced flavor, making it a favorite among chefs and kitchen staff alike.

The PS840 offers a variable-speed conveyor system that allows users to adjust cooking times according to the specific requirements of different food items. This flexibility enables operators to achieve precise results, whether they are baking thin-crust pizzas or roasting vegetables. Additionally, the oven reaches optimal cooking temperatures quickly, minimizing wait times during peak service hours.

Energy efficiency is another key characteristic of the Middleby Marshall PS840 Series. Built with high-quality insulation and advanced heating elements, this series is designed to significantly reduce energy consumption while maintaining performance. This not only lowers operational costs but also supports sustainable practices in the foodservice industry.

The PS840 Series includes a user-friendly digital control panel that makes it easy for operators to set cooking times and temperatures, monitor performance, and switch between cooking modes. This intuitive interface reduces the learning curve for new staff and enhances overall productivity in busy kitchens.

Another notable feature of the PS840 Series is its durability. Constructed with robust materials, this oven is designed to withstand the wear and tear of a commercial kitchen environment. Its easy-to-clean surfaces and removable conveyor belt further enhance its maintenance convenience, allowing kitchens to maintain high hygiene standards with ease.

In summary, the Middleby Marshall PS840 Series stands out in the market for its exceptional cooking performance, energy efficiency, user-friendly controls, and robust design. These features make it a versatile and reliable choice for any establishment looking to enhance their food production capabilities while delivering quality dishes consistently. Whether utilized for baking, roasting, or reheating, the PS840 Series excels in meeting the demands of the modern foodservice industry.