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Middleby Marshall
Oven
PS224 series
Middleby Marshall PS224 series User Manual
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2
Table of Contents
Notice Middleby Marshall Reserves the Right to Change Specifications at any Time.
3
Table of Contents
3
Section 1 - Sequence of Operation
5
Gas Oven Sequence of Operation
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Electric Oven Sequence of Operation
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Section 2 - Air Flow and Heat Transfer
8
Types of Heat Transfer
8
Blowers and Blower Speed
8
PS200-Series Ovens
8
PS360-Series Ovens
9
PS555/570-Series Ovens
9
Air Fingers
9
Description and Function
9
Configuration and Alignment
10
Performing a Test Bake
10
PS300/350 Air Finger Shutter Adjustment
11
Oven Capacity
13
Conveyor Speed and Bake Time
13
Belt Time
13
Time of Delivery (TOD)
13
Section 3 - Troubleshooting and Servicing Components I. Conveyor Speed Controller and Drive Motor
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Part Number Reference - Speed Controllers
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Part Number Reference - Pickup Assemblies
15
Preparing to Service the Speed Controller
15
Controller/Motor Failure
16
Basic Troubleshooting Flowcharts
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X95; if the Conveyor Runs at Full Speed
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X95; if the Conveyor will Not Run at All
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Initial Troubleshooting
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Conveyor Control Pickup Test
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Conveyor Motor Test
20
Replacing the Magnetic Pickup
20
Unshielded Pickup Wires on Early PS360-Series Ovens . 19 K. Appendices
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Conveyor Sensor Wiring Changes for PS360-Series and PS570S, 10/95
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Service Bulletin MM-133B - Installation Instructions for Conveyor Speed Controller Kit with Thumbwheel, P/N 42810-0133, 4/95
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Speed Controller Kit with Thumbwheel, 4/95
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Service Bulletin MM-177 - Introduction and Compat- Ibility of Conveyor Speed Controller with Digital Display, P/N 37337, 8/00
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Instructions for Service Kit 44756 - Conveyor Speed Controller Kit for PS200R68-Series Ovens, 2/02
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Service Bulletin MM-189 - New Conveyor Gear Motors, Brushes, and Pickup Clamps, 8/01
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With Digital Display (P/N 37337), 4/02
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Temperature Controller
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Part Number Reference - Temperature Controllers
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Description
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High Limit/Cooldown Functions
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Troubleshooting
33
Appendices
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E. Appendice S
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Temperature Controller Terminal Cross-Reference, 4/02
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Instructions for Service Kit 47321 Digital Temperature Controller
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Temperature Controller Kit, 2/02
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Appendix - Instructions for Service Kit 47321 - Digital Temperature Controller Kit, 2/02
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Controller Types
35
Before You Begin
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Installation
36
Electrical Connections
37
Jumper Setting
39
Programming
39
Diagnostic Error Messages
41
Operating Instructions (to be Left with Customer after Installation)
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741-3300 • FAX (847) 741-4406
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High Limit Control Module
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Part Number Reference - High Limit Control Modules
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Location
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Troubleshooting
46
Appendices
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Instructions for Service Kit 39733 - High Limit Conversion Kit for PS300, 310, 350 & 360 Ovens, 5/99
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Thermocouples
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Part Number Reference - Thermocouples
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Thermocouple Functions
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Troubleshooting
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Instructions for Service Kits P/Ns 33984 and 33985 Oven Thermocouple Kit
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Appendices
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Oven Thermocouple Kit, 11/01
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Appendix - Instructions for Service Kits 33984 and 33985 -
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PS200 Series - 2/96 or Later, Serial Numbers after ASH-0001
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PS200 Series - before 2/96, Serial Numbers before ASH-0001
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PS360 Series Rear Wall Thermocouples - before 2/96, Serial Numbers before ASH-0001
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Machinery Compartment
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Ps536
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PS555 Electric and PS555E
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PS570 (X01-X05 Name Plate ID Numbers) and PS570S (Early) with Side-Mounted Thermocouples Inside or Outside the Blower Motor Compartments
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PS570S (Late) - Rear Wall Thermocouples with Left-Side and Right-Side Terminal Block Connections
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PS555G and PS570G Rear Wall Thermocouples with Left-Side Terminal Block Connections
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Blowers
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PS200-Series Ovens
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PS360-Series Ovens
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PS555/570-Series Ovens
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Blower Motor Centrifugal Safety Switch (PS360-Series)
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Part Number Reference - Blower Centrifugal Switch
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Troubleshooting
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Burner Blower Motor Centrifugal Safety Switch (PS200- Series Gas, PS310, PS314, PS360, PS360WB, PS570S)
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Air Pressure Safety Switch (PS200-Series, PS555/570- Series, PS360EWB, PS360WB70)
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Part Number Reference - Air Switches
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Troubleshooting
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Appendices
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Air Pressure Switch Replacement Kits, 1/97
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P/N 36194 with Service Kit P/N 35624, 3/97
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PS570/570S Flame Gate
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Part Number Reference - Flame Gate
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Flame Gate Orientation
88
Gas Train and Burner System
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Part Number Reference - Gas Train Components
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Part Number Reference - Gas Orifices and Gas Conversion Kits
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Component Identification
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Pilot/Ignitor Assembly
94
Burner Blower Motor
96
Air Shutter
96
Burner Transformer
97
Burner Motor Relay
97
High Flame Solenoid Valve
97
Bypass (Low Flame) Orifice
97
Modulating Gas Valve
98
Amplifier Board
98
Combination Gas Control Valve
99
Ignition Module
100
Gas Conversion Kits
101
Burner and Gas Train Troubleshooting
101
Checking the Gas Pressures
103
Troubleshooting Flowcharts
104
X95; Intermittent Pilot System Troubleshooting Table
104
X95; no Spark, System Does Not Work
105
X95; Spark Is Present, Pilot will Not Light
106
X95; Pilot Lights, Main Valve will Not Come on
107
Appendices
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Pilot/Ignitor Kit, 7/91
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X95; Instructions for Service Kit 30185 - Pilot Tee
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Combination Gas Valve, 1/92
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Ignition Module, 11/90
117
During Burner Operation, 4/02
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For Ovens with Wayne Burner, Natural Gas to
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Propane, 8/00
120
For Ovens with Wayne Burner, Propane to
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Natural Gas, 8/00
126
Instructions for Service Kit 36856 - Gas Conversion Kit for PS360EWB/WB70 with Midco Burner, Natural Gas to Propane, 1/98
132
Instructions for Service Kit 36863 - Gas Conversion Kit for PS360EWB/WB70 with Midco Burner, Propane to Natural Gas, 1/98
136
Equivalent Orifice Sizes at High Altitudes
140
Electric Oven Heating System
141
PS200-Series Ovens
141
PS310/360-Series Ovens
143
PS555 Ovens
145
Electric Oven Mercury Contactor Replacement
147
Component Wiring
150
Temperature Controllers
150
Ignition Modules
151
Section 4 - Electrical Wiring Diagrams
150
PS200-Series Ovens
152
PS310/360-Series Ovens
161
PS555/570-Series Ovens
167
Section 5 - Reference
173
25-Point Preventative Maintenance Checklist
173
Fractional Inches to Decimal and Millimeter Equivalents
174
Decimal Equivalents of Drill Sizes
174
General Conversion Factors
175
Pressure Conversions
175
Pressure Conversion Chart
176
Ohm’S Law Equation Wheel
176
Common Electrical Wiring Diagram Symbols
177
5
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Middleby Marshall PS224 series Specifications
General
Brand
Middleby Marshall
Model
PS224 series
Category
Oven
Language
English
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