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Middleby Marshall Manuals
Oven
PS224 series
Technical & service manual
Middleby Marshall PS224 series Technical & Service Manual
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Also See for PS224 series
:
Owner's operating & installation manual
(144 pages)
,
Technical & service manual
(182 pages)
,
Parts manual
(20 pages)
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Contents
Table of Contents
Troubleshooting
Bookmarks
Table of Contents
Notice Middleby Marshall Reserves the Right to Change Specifications at any Time.
Table of Contents
Section 1 - Sequence of Operation
Gas Oven Sequence of Operation
Electric Oven Sequence of Operation
Section 2 - Air Flow and Heat Transfer
Types of Heat Transfer
Blowers and Blower Speed
PS200-Series Ovens
PS360-Series Ovens
PS555/570-Series Ovens
Air Fingers
Description and Function
Configuration and Alignment
Performing a Test Bake
PS300/350 Air Finger Shutter Adjustment
Oven Capacity
Conveyor Speed and Bake Time
Belt Time
Time of Delivery (TOD)
Section 3 - Troubleshooting and Servicing Components I. Conveyor Speed Controller and Drive Motor
Part Number Reference - Speed Controllers
Part Number Reference - Pickup Assemblies
Preparing to Service the Speed Controller
Controller/Motor Failure
Basic Troubleshooting Flowcharts
X95; if the Conveyor Runs at Full Speed
X95; if the Conveyor will Not Run at All
Initial Troubleshooting
Conveyor Control Pickup Test
Conveyor Motor Test
Replacing the Magnetic Pickup
Unshielded Pickup Wires on Early PS360-Series Ovens . 19 K. Appendices
Conveyor Sensor Wiring Changes for PS360-Series and PS570S, 10/95
Service Bulletin MM-133B - Installation Instructions for Conveyor Speed Controller Kit with Thumbwheel, P/N 42810-0133, 4/95
Speed Controller Kit with Thumbwheel, 4/95
Service Bulletin MM-177 - Introduction and Compat- Ibility of Conveyor Speed Controller with Digital Display, P/N 37337, 8/00
Instructions for Service Kit 44756 - Conveyor Speed Controller Kit for PS200R68-Series Ovens, 2/02
Service Bulletin MM-189 - New Conveyor Gear Motors, Brushes, and Pickup Clamps, 8/01
With Digital Display (P/N 37337), 4/02
Temperature Controller
Part Number Reference - Temperature Controllers
Description
High Limit/Cooldown Functions
Troubleshooting
Appendices
E. Appendice S
Temperature Controller Terminal Cross-Reference, 4/02
Instructions for Service Kit 47321 Digital Temperature Controller
Temperature Controller Kit, 2/02
Appendix - Instructions for Service Kit 47321 - Digital Temperature Controller Kit, 2/02
Controller Types
Before You Begin
Installation
Electrical Connections
Jumper Setting
Programming
Diagnostic Error Messages
Operating Instructions (to be Left with Customer after Installation)
741-3300 • FAX (847) 741-4406
High Limit Control Module
Part Number Reference - High Limit Control Modules
Location
Troubleshooting
Appendices
Instructions for Service Kit 39733 - High Limit Conversion Kit for PS300, 310, 350 & 360 Ovens, 5/99
Thermocouples
Part Number Reference - Thermocouples
Thermocouple Functions
Troubleshooting
Instructions for Service Kits P/Ns 33984 and 33985 Oven Thermocouple Kit
Appendices
Oven Thermocouple Kit, 11/01
Appendix - Instructions for Service Kits 33984 and 33985 -
PS200 Series - 2/96 or Later, Serial Numbers after ASH-0001
PS200 Series - before 2/96, Serial Numbers before ASH-0001
PS360 Series Rear Wall Thermocouples - before 2/96, Serial Numbers before ASH-0001
Machinery Compartment
Ps536
PS555 Electric and PS555E
PS570 (X01-X05 Name Plate ID Numbers) and PS570S (Early) with Side-Mounted Thermocouples Inside or Outside the Blower Motor Compartments
PS570S (Late) - Rear Wall Thermocouples with Left-Side and Right-Side Terminal Block Connections
PS555G and PS570G Rear Wall Thermocouples with Left-Side Terminal Block Connections
Blowers
PS200-Series Ovens
PS360-Series Ovens
PS555/570-Series Ovens
Blower Motor Centrifugal Safety Switch (PS360-Series)
Part Number Reference - Blower Centrifugal Switch
Troubleshooting
Burner Blower Motor Centrifugal Safety Switch (PS200- Series Gas, PS310, PS314, PS360, PS360WB, PS570S)
Air Pressure Safety Switch (PS200-Series, PS555/570- Series, PS360EWB, PS360WB70)
Part Number Reference - Air Switches
Troubleshooting
Appendices
Air Pressure Switch Replacement Kits, 1/97
P/N 36194 with Service Kit P/N 35624, 3/97
PS570/570S Flame Gate
Part Number Reference - Flame Gate
Flame Gate Orientation
Gas Train and Burner System
Part Number Reference - Gas Train Components
Part Number Reference - Gas Orifices and Gas Conversion Kits
Component Identification
Pilot/Ignitor Assembly
Burner Blower Motor
Air Shutter
Burner Transformer
Burner Motor Relay
High Flame Solenoid Valve
Bypass (Low Flame) Orifice
Modulating Gas Valve
Amplifier Board
Combination Gas Control Valve
Ignition Module
Gas Conversion Kits
Burner and Gas Train Troubleshooting
Checking the Gas Pressures
Troubleshooting Flowcharts
X95; Intermittent Pilot System Troubleshooting Table
X95; no Spark, System Does Not Work
X95; Spark Is Present, Pilot will Not Light
X95; Pilot Lights, Main Valve will Not Come on
Appendices
Pilot/Ignitor Kit, 7/91
X95; Instructions for Service Kit 30185 - Pilot Tee
Combination Gas Valve, 1/92
Ignition Module, 11/90
During Burner Operation, 4/02
For Ovens with Wayne Burner, Natural Gas to
Propane, 8/00
For Ovens with Wayne Burner, Propane to
Natural Gas, 8/00
Instructions for Service Kit 36856 - Gas Conversion Kit for PS360EWB/WB70 with Midco Burner, Natural Gas to Propane, 1/98
Instructions for Service Kit 36863 - Gas Conversion Kit for PS360EWB/WB70 with Midco Burner, Propane to Natural Gas, 1/98
Equivalent Orifice Sizes at High Altitudes
Electric Oven Heating System
PS200-Series Ovens
PS310/360-Series Ovens
PS555 Ovens
Electric Oven Mercury Contactor Replacement
Component Wiring
Temperature Controllers
Ignition Modules
Section 4 - Electrical Wiring Diagrams
PS200-Series Ovens
PS310/360-Series Ovens
PS555/570-Series Ovens
Section 5 - Reference
25-Point Preventative Maintenance Checklist
Fractional Inches to Decimal and Millimeter Equivalents
Decimal Equivalents of Drill Sizes
General Conversion Factors
Pressure Conversions
Pressure Conversion Chart
Ohm’S Law Equation Wheel
Common Electrical Wiring Diagram Symbols
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Quick Links
1
Ps200-Series Ovens
2
Ps360-Series Ovens
3
Section 3 - Troubleshooting and Servicing Components I. Conveyor Speed Controller and Drive Motor
4
Troubleshooting
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Chapters
Notice Middleby Marshall Reserves the Right to Change Specifications at Any Time.
3
Instructions for Service Kit 47321 Digital Temperature Controller
34
Instructions for Service Kits P/Ns 33984 and 33985 Oven Thermocouple Kit
57
Table of Contents
Troubleshooting
Section 3 - Troubleshooting and Servicing Components I. Conveyor Speed Controller and Drive Motor
14
Basic Troubleshooting Flowcharts
17
Initial Troubleshooting
19
Description
33
High Limit Control Module
46
Thermocouples
55
Blower Motor Centrifugal Safety Switch (PS360-series)
81
Troubleshooting
83
Gas Conversion Kits
101
Troubleshooting Flowcharts
104
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