Middleby Marshall PS200, PS570, PS360, PS555, PS220 Technical service Manual, Middleby Marshall, Inc

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technical service

manual

This Technical Service Manual includes information

for the following oven models:

PS200/220/224 Series

PS310/360 Series

PS555/570 Series

P/N 47829 • Rev. C • V1 • 4/02

Middleby is proud to support the

Commercial Food Equipment Service Association (CFESA).

We recognize and applaud CFESA’s ongoing efforts

to improve the quality of technical service in the industry.

© 2002 Middleby Marshall, Inc.

is a registered trademark of Middleby Marshall, Inc. All rights reserved.

Middleby Cooking Systems Group • 1400 Toastmaster Drive • Elgin, IL 60120 • (847) 741-3300 • FAX (847) 741-440624-Hour Service Hotline (800) 238-8444

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Contents Page Technical service Manual Middleby Marshall, IncTable of Contents Table of Contents Section Sequence of Operation GAS Oven Sequence of OperationSequence of Operation Sequence of Operation II. Blowers and Blower Speed Blowers, belts and pulleysTypes of Heat Transfer PS200-series PS360-seriesCurrent standard air finger all oven models Air finger operationPS300/350 air finger with shutter plate III. AIR FingersPerforming a Test Bake Configuration and Alignment3D air finger label if present PS300/350 Air Finger Shutter Adjustment Front-to-back uneven bakePS300/350-style air finger with adjustable shutter plate Do notBelt Time IV. Oven CapacityConveyor Speed and Bake Time Time of Delivery TODConveyor Speed Controller and Drive Motor Original-style speed controllerCurrent-style speed controller Part Number Reference Speed ControllersPart Number Reference Pickup Assemblies Current-style pickup assembly see FiguresPreparing to Service the Speed Controller Field Tester for Conveyor Drive Motor Current pickup assembly side viewCurrent pickup assembly End view Controller/Motor FailureBasic Troubleshooting Flowcharts If the Gear Motor Runs AT Full SpeedIf the Gear Motor will not RUN AT ALL Initial Troubleshooting Check the magnetic pickup on the motorConveyor Control Pickup Test Conveyor Motor Test Unshielded Pickup Wires on Early PS360-series ovensConnections for pickup test Replacing the Magnetic PickupAppendices Servicing Components Servicing Components Servicing Components Servicing Components Servicing Components Servicing Components Application SubjectGeneral CompatibilityConveyor Speed Controller Kit for PS200R68-series ovens Bulletin No. MM-189 II. Temperature Controller 28071-0018 a Part Number Reference Temperature Controllers28071-0012 a 34983 BDescription COMDigital Temperature Controller Controller Types Before you Begin Electrical Connections Variable Pulse Output System Jumper Setting Temperature Diagnostic Error Messages Digital Temperature Controller Operating Instructions Middleby Corporation Service Hotline Servicing Components Servicing Components Part Number Reference High Limit Control Mod- ules Operation and TroubleshootingIII. High Limit Control Module LocationAppendix Instructions for Service Kit High Limit Conversion Kit for PS300, 310, 350, & 360 OvensInstallation Not to Scale For Ovens with a Digital Temperature Controller For Ovens with an Analog Temperature ControllerTesting the Installation Ovens with a cooldown feature Replacement United Electric ModelOvens without a cooldown feature Replacement Middleby Corporation Service Hotline Part Number Reference Thermocouples TroubleshootingIV. Thermocouples Thermocouple FunctionsServicing Components Oven Thermocouple Kit PS200 Series before 2/96, serial numbers before ASH-0001 Thermocouple Wiring PS360 Series Analog Temperature Controller Digital PS536 Thermocouple Wiring PS555 PS555 Electric and PS555E Servicing Components High limit thermocouple High limit thermocouple Position for ovens with Thermocouple Wiring PS570S Late Left to Right Conveyor Thermocouple Wiring PS555G and PS570G Blower motor fuses Early-style PS200 indirect drive assemblyCurrent PS200 indirect drive assembly BlowersRepositioning the blower motor Bearing lubricationBlower belt tension Fan shaft alignment tool Qty Part Number Description Four-point alignment test for correct pulley alignment Also available PS360-series ovens Blower motor fuses single-phase motorsBlower motor fuses three-phase motors Clockwise blower wheel Inlet ring Blower wheel puller toolPS570/570S blower configuration PS555/570-series ovensIntl. Tricon StandardPizza Hut Domino’s QPS500-series blower wheel orientation Bearing replacement and alignment Blower belt tension Repositioning the blower motorVI. Blower Motor Centrifugal Safety Switch PS360-SERIES Part Number Reference Blower Centrifugal SwitchAir pressure safety switch models PS360WB70/EWB with Midco burner PS360WB70/EWB with Wayne burnerServicing Components Servicing Components Servicing Components Servicing Components Part Number Reference Flame Gate PS570/570S flame gate adjustmentIX. PS570/570S Flame Gate Flame Gate OrientationGAS Train and Burner System PS200-series gas trainPS310, PS314, PS360 or PS360WB gas train Part Number ReferencePS360EWB or PS360WB70 gas train with Midco burner PS360EWB or PS360WB70 gas train with Wayne burnerPS570S gas train PS570G or PS555 gas trainWayne burner exploded view Part Number Reference Gas Orifices and Gas Conversion KitsSolenoid valve vs. Modulating valve Component IdentificationBurner type Flame targets Pilot/Ignitor AssemblyEnd of burner without flame target Showing pilot shield Voltage Flame structureFlame Rectification Gas PressurePilot Application Air shutter adjustmentTemperature Burner Blower MotorBurner Motor Relay Low Flame Bypass OrificeBurner Transformer High Flame Solenoid Valve if so equippedModulating Gas Valve if so equipped Pilot pressure Burrs in pilot adjustment portalCombination Gas Control Valve Ignition Module Gas Conversion Kits Burner and Gas Train Troubleshooting100 Combination Gas Valve Voltage Checks for Ignition Module Combination Gas Valve101 Check Spark Ignition Circuit Component Checks Reset System After Lockout102 Check Spark IgnitorTroubleshooting Flowcharts 103104 105 106 107 Appendix Instructions for Service Kit 30185 Pilot Tee, 3/94 108109 110 111 112 113 114 115 Appendix Instructions for Service Kit Ignition Module, 11/90 116117 118 119 Appendix Instructions for All Gas Conversion KitsEnglish 120Preparation and Disassembly 121122 IV. Pilot Orifice Conversion123 VII. GAS Leak Test VIII. Inlet Pressure CheckManifold Pressure Adjustment 124125 For Ovens with Wayne Burner, Propane to Natural Gas, 8/00126 127 NUTS.3128 IX. Pilot Pressure Adjustment 129130 Preparation Pilot Orifice Replacement131 132 Main Orifice ReplacementLOW Flame Orifice Replacement PS360WB70 only GAS Leak Test133 Pilot Pressure AdjustmentMain Manifold Pressure Adjustment Inlet Pressure CheckPropane 134Conversion Labeling 36856Propane to Natural Gas Installation Instructions 135136 137 14 W.C./34.9mbar 138Natural 139 XI. Electric Oven Heating System PS200 electric early with mercury Contactors and fuses140 Part No. DescriptionIndividual element electrical data Removing elements141 PS310/360-series ovens Electrical leads disconnected142 Element bank removed spacer bracket visible 143144 PS555 ovensPS555 electric oven heating element removal 145Mercury Contactor Replacement 146147 148 Component Wiring 149150 151 II. PS200-SERIES Ovens152 153 154 155 156 157 158 159 III. PS360-SERIES Ovens Electrical Wiring Diagrams 160161 162 163 164 165 III. PS555/570-SERIES Ovens Electrical Wiring Diagrams 166167 168 169 170 171 Check and clean blow out and brush axial fans Check and clean blow out machinery/control compartmentCheck and clean blow out main blower motors Check and clean igniter assembly173 174 Multiply To ObtainPressure conversion chart 175176 177 178 179 180
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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.