Middleby Marshall PS224 PS310 User Manuals

Table of Contents

• Section 1 - Sequence of Operation

  4
• F. Initial Troubleshooting

  18
• Gas Oven Sequence of Operation

  4
• G. Conveyor Control Pickup Test

  19
• II. Electric Oven Sequence of Operation

  6
• H. Conveyor Motor Test

  19
• I. Replacing the Magnetic Pickup

  19
• Section 2 - Air Flow and Heat Transfer

  7
• Types of Heat Transfer

  7
• K. Appendices

  20
• II. Blowers and Blower Speed

  7
• A. PS200-series ovens

  7
• and PS570S, 10/95

  20
• B. PS360-series ovens

  8
• C. PS555/570-series ovens

  8
• P/N 42810-0133, 4/95

  21
• III. Air Fingers

  8
• A. Description and Function

  8
• Speed Controller Kit with Thumbwheel, 4/95

  23
• B. Configuration and Alignment

  9
• C. Performing a Test Bake

  9
• D. PS300/350 Air Finger Shutter Adjustment

  10
• Display, P/N 37337, 8/00

  27
• IV. Oven Capacity

  12
• A. Conveyor Speed and Bake Time

  12
• B. Belt Time

  12
• C. Time of Delivery (TOD)

  12
• Motors, Brushes, and Pickup Clamps, 8/01

  29
• with Digital Display (P/N 37337), 4/02

  30
• Temperature Controller

  30
• Conveyor Speed Controller and Drive Motor

  13
• A. Part Number Reference - Temperature Controllers

  31
• A. Part Number Reference - Speed Controllers

  13
• B. Description

  32
• B. Part Number Reference - Pickup Assemblies

  14
• C. High Limit/Cooldown Functions

  32
• C. Preparing to Service the Speed Controller

  14
• D. Troubleshooting

  32
• D. Controller/Motor Failure

  15
• E. Appendices

  32
• E. Basic Troubleshooting Flowcharts

  16
• If the Conveyor Runs at Full Speed

  16
• Cross-Reference, 4/02

  32
• If the Conveyor Will Not Run at All

  17
• Temperature Controller Kit, 2/02

  33
• 9/93

  43
• III. High Limit Control Module

  45
• Troubleshooting Flowcharts

  103
• A. Part Number Reference - High Limit Control Modules

  45
• B. Location

  45
• No Spark, System Does Not Work

  104
• C. Troubleshooting

  45
• Spark is Present, Pilot Will Not Light

  105
• D. Appendices

  46
• Pilot Lights, Main Valve Will Not Come On

  106
• Instructions for Service Kit 39733 - S. Appendices

  107
• 350 & 360 Ovens, 5/99

  46
• Pilot/Ignitor Kit, 7/91

  107
• IV. Thermocouples

  54
• A. Part Number Reference - Thermocouples

  54
• B. Thermocouple Functions

  54
• Combination Gas Valve, 1/92

  112
• C. Troubleshooting

  54
• D. Appendices

  56
• Ignition Module, 11/90

  116
• Oven Thermocouple Kit, 11/01

  56
• during Burner Operation, 4/02

  118
• V. Blowers

  68
• A. PS200-series ovens

  68
• B. PS360-series ovens

  74
• Propane, 8/00

  119
• C. PS555/570-series ovens

  76
• VI. Blower Motor Centrifugal Safety Switch (PS360-series)

  80
• Natural Gas, 8/00

  125
• A. Part Number Reference - Blower Centrifugal Switch

  80
• B. Troubleshooting

  80
• Midco Burner, Natural Gas to Propane, 1/98

  131
• series gas, PS310, PS314, PS360, PS360WB, PS570S)

  80
• series, PS360EWB, PS360WB70)

  81
• Midco Burner, Propane to Natural Gas, 1/98

  135
• A. Part Number Reference - Air Switches

  81
• B. Troubleshooting

  82
• Electric Oven Heating System

  140
• C. Appendices

  83
• A. PS200-series ovens

  140
• Instructions for Service Kits 35624 and 35625 - B. PS310/360-series ovens

  142
• Air Pressure Switch Replacement Kits, 1/97

  83
• C. PS555 ovens

  144
• Instructions to Replace an “Alternate” Air Switch D. Electric Oven Mercury Contactor Replacement

  146
• P/N 36194 with Service Kit P/N 35624, 3/97

  85
• IX. PS570/570S Flame Gate

  87
• Section 4 - Electrical Wiring Diagrams

  149
• A. Part Number Reference - Flame Gate

  87
• Component Wiring

  149
• B. Flame Gate Orientation

  87
• A. Temperature Controllers

  149
• X. Gas Train and Burner System

  88
• B. Ignition Modules

  150
• A. Part Number Reference - Gas Train Components

  88
• II. PS200-series Ovens

  151
• III. PS310/360-series Ovens

  160
• Conversion Kits

  91
• IV. PS555/570-series Ovens

  166
• C. Component Identification

  92
• D. Pilot/Ignitor Assembly

  93
• Section 5 - Reference

  172
• E. Burner Blower Motor

  95
• 25-point preventative maintenance checklist

  172
• Air Shutter

  95
• G. Burner Transformer

  96
• Decimal equivalents of drill sizes

  173
• H. Burner Motor Relay

  96
• General conversion factors

  174
• High Flame Solenoid Valve

  96
• Pressure conversions

  174
• Bypass (Low Flame) Orifice

  96
• Pressure conversion chart

  175
• K. Modulating Gas Valve

  97
• Ohm’s Law equation wheel

  175
• L. Amplifier Board

  97
• Common electrical wiring diagram symbols

  176
• M. Combination Gas Control Valve

  98
• N. Ignition Module

  99
• O. Gas Conversion Kits

  100
• Burner and Gas Train Troubleshooting

  100
• Q. Checking the Gas Pressures

  102
• Controller Types

  2
• Before You Begin

  3
• Installation

  3
• Electrical Connections

  4
• Jumper Setting

  6
• Programming

  6
• Diagnostic Error Messages

  8
• Operating Instructions (to be left with customer after installation)

  9
• PS200 Series - before 2/96, serial numbers before ASH-0001

  2
• PS200 Series - 2/96 or later, serial numbers after ASH-0001

  2
• connections (no terminal blocks)

  8
• PS555 Electric and PS555E

  9
• numbers before ASH-0001

  3
• numbers after ASH-0001

  3
• the blower motor compartments

  10
• machinery compartment

  4
• right-side terminal block connections

  12
• PS536

  5
• left-side terminal block connections

  14