Middleby Marshall PS570, PS360, PS200, PS555, PS220, PS224 PS310 manual Bulletin No. MM-189

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SECTION 3 - SERVICING COMPONENTS

Appendix - Service Bulletin MM-189 - New Conveyor Gear Motors,

Brushes, and Pickup Clamps, 8/01

Bulletin No. MM-189

Date: 8/24/01

Middleby Cooking Systems Group

1400 Toastmaster Drive • Elgin, IL 60120-9272 U. S. A. • Telephone: (847)741-3300 • Service and Parts Fax: (847)741-4406

Service Bulletin

SUBJECT

New conveyor gear motors, brushes, and pickup clamps for Middleby Marshall ovens

GENERAL

The conveyor gear motors used on all Middleby Marshall ovens (except model PS536) have been redesigned by the vendor. Changes to the motors include:

A smaller-diameter motor casing.

New motor brushes.

-Old-style motors continue to use brush P/Ns 22450-0052or 22450-0230as shown in the table below.

-All of the new motors use brush P/N 46658.

A shorter clamp to attach the pickup assembly. This accommodates the smaller diameter of the motor.

-The pickup assembly with the original clamp is still available as P/N 27170-0263. This kit is only available in limited quantities. After our stock of the old-style pickup assembly kit is exhausted, you will need to save the existing clamp to attach a new pickup assembly to an old-style motor.

-The pickup assembly with the new, shorter clamp is available as P/N 46451.

-All of the new motors will be shipped in a kit that also includes the new clamp. This allows you to attach an existing pickup assembly to a new motor.

-In 7/01 and 8/01, some of the new motors were shipped under the part numbers of the old motors. These parts shipped without the new clamp. In most of these cases, you can tighten the existing clamp to fit the new motor. Some older clamps, however, cannot be tightened enough to fit. To be sure that you can install the new motor in all ovens, you should add the new clamp, P/N 46602, to your required parts stocking list, and carry a few spare clamps on each service vehicle.

Please be aware of these changes as you order your stocking parts. Some versions of the old motor, as well as the old- style pickup assembly, are still available in limited quantities. The brush for the old motor (P/N 22450-0052) will remain available in order to maintain motors already in the field.

 

 

Old

Old

Old

New

New

New

New

Ratio

Used on

Motor

Brush

Pickup

Motor*

Brush

Pickup

Clamp

1400:1

PS310

27384-0008

22450-0052

27170-0263

46603

46658

46451

46602

 

PS314

 

 

 

 

 

 

 

 

PS360/360S

 

 

 

 

 

 

 

 

PS360SS High Speed

 

 

 

 

 

 

 

 

PS360T Tandem

 

 

 

 

 

 

 

 

PS360WB

 

 

 

 

 

 

 

 

PS360WB70

 

 

 

 

 

 

 

 

PS360EWB

 

 

 

 

 

 

 

 

PS555

 

 

 

 

 

 

 

 

PS570/570S Single Belt

 

 

 

 

 

 

 

1350:1

PS200/220FS/224

27384-0011

22450-0230

27170-0263

46604

46658

46451

46602

 

PS200VL/220VL/224VL

 

 

 

 

 

 

 

 

PS200R68/220R68/224R68

 

 

 

 

 

 

 

 

PS200T Tandem

 

 

 

 

 

 

 

 

PS570/570S Split Belt (Standard)

 

 

 

 

 

 

 

600:1

PS314SBI

27384-0003

22450-0052 27170-0263

46605

46658

46451

46602

300:1

PS200/220FS/224 (High Speed)

27384-0014

22450-0230

27170-0263

46606

46658

46451

46602

 

PS570/570S Split Belt (High Speed)

 

 

 

 

 

 

 

*“New Motor” part numbers shown in this table are kits that include both the motor and the new pickup clamp.

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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 FingersConfiguration and Alignment 3D air finger label if presentPerforming a Test Bake 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 ControllersCurrent-style pickup assembly see Figures Preparing to Service the Speed ControllerPart Number Reference Pickup Assemblies 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 BlowersBearing lubrication Blower belt tensionRepositioning the blower motor Fan shaft alignment tool Qty Part Number Description Four-point alignment test for correct pulley alignment Also available Blower motor fuses single-phase motors Blower motor fuses three-phase motorsPS360-series ovens 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 KitsComponent Identification Burner typeSolenoid valve vs. Modulating valve Pilot/Ignitor Assembly End of burner without flame target Showing pilot shieldFlame targets 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 Burrs in pilot adjustment portal Combination Gas Control ValvePilot pressure Ignition Module Burner and Gas Train Troubleshooting 100Gas Conversion Kits Voltage Checks for Ignition Module Combination Gas Valve 101Combination Gas Valve 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 Pilot Orifice Replacement 131Preparation 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 137 138 Natural14 W.C./34.9mbar 139 XI. Electric Oven Heating System PS200 electric early with mercury Contactors and fuses140 Part No. DescriptionRemoving elements 141Individual element electrical data Electrical leads disconnected 142PS310/360-series ovens 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.