Table of contents (continued) – Middleby Marshall PS200 series User Manual
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III.
High Limit Control Module ...........................................................45
A. Part Number Reference - High Limit Control Modules ......45
B.
Location ..............................................................................45
C.
Troubleshooting ..................................................................45
D.
Appendices .........................................................................46
Instructions for Service Kit 39733 -
High Limit Conversion Kit for PS300, 310,
350 & 360 Ovens, 5/99 ..............................................46
IV. Thermocouples ...........................................................................54
A. Part Number Reference - Thermocouples ........................54
B.
Thermocouple Functions ....................................................54
C.
Troubleshooting ..................................................................54
D.
Appendices .........................................................................56
Instructions for Service Kits 33984 and 33985 -
Oven Thermocouple Kit, 11/01 .................................56
V.
Blowers ....................................................................................68
A. PS200-series ovens ...........................................................68
B.
PS360-series ovens ...........................................................74
C.
PS555/570-series ovens ...................................................76
VI. Blower Motor Centrifugal Safety Switch (PS360-series) .......80
A. Part Number Reference - Blower Centrifugal Switch ......80
B.
Troubleshooting ..................................................................80
VII. Burner Blower Motor Centrifugal Safety Switch (PS200-
series gas, PS310, PS314, PS360, PS360WB, PS570S) .........80
VIII. Air Pressure Safety Switch (PS200-series, PS555/570-
series, PS360EWB, PS360WB70) .............................................81
A. Part Number Reference - Air Switches ............................81
B.
Troubleshooting ..................................................................82
C.
Appendices .........................................................................83
Instructions for Service Kits 35624 and 35625 -
Air Pressure Switch Replacement Kits, 1/97 ..........83
Instructions to Replace an Alternate Air Switch
P/N 36194 with Service Kit P/N 35624, 3/97 ...........85
IX. PS570/570S Flame Gate .............................................................87
A. Part Number Reference - Flame Gate ...............................87
B.
Flame Gate Orientation .......................................................87
X.
Gas Train and Burner System ...................................................88
A. Part Number Reference - Gas Train Components............88
B.
Part Number Reference - Gas Orifices and Gas
Conversion Kits ..................................................................91
C.
Component Identification ....................................................92
D.
Pilot/Ignitor Assembly ..........................................................93
E.
Burner Blower Motor ..........................................................95
F.
Air Shutter ...........................................................................95
G.
Burner Transformer ...........................................................96
H.
Burner Motor Relay ............................................................96
I.
High Flame Solenoid Valve .................................................96
J.
Bypass (Low Flame) Orifice .............................................96
K.
Modulating Gas Valve .........................................................97
L.
Amplifier Board ...................................................................97
M. Combination Gas Control Valve .........................................98
N.
Ignition Module ....................................................................99
O. Gas Conversion Kits ....................................................... 100
P.
Burner and Gas Train Troubleshooting .......................... 100
Q. Checking the Gas Pressures .......................................... 102
TABLE OF CONTENTS (continued)
R.
Troubleshooting Flowcharts ........................................... 103
Intermittent Pilot System Troubleshooting Table 103
No Spark, System Does Not Work ........................ 104
Spark is Present, Pilot Will Not Light ................... 105
Pilot Lights, Main Valve Will Not Come On ......... 106
S.
Appendices ...................................................................... 107
Instructions for Service Kit 42810-0117 -
Pilot/Ignitor Kit, 7/91 ............................................... 107
Instructions for Service Kit 30185 - Pilot Tee, 3/94 . 108
Instructions for Service Kit 42810-0121 -
Combination Gas Valve, 1/92 ................................ 112
Instructions for Service Kit 42810-0114 -
Ignition Module, 11/90 ............................................. 116
Position of Combination Gas Valve Components
during Burner Operation, 4/02 ................................ 118
Instructions for All Gas Conversion Kits
for Ovens with Wayne Burner, Natural Gas to
Propane, 8/00 ........................................................... 119
Instructions for All Gas Conversion Kits
for Ovens with Wayne Burner, Propane to
Natural Gas, 8/00 ................................................... 125
Instructions for Service Kit 36856 - Gas
Conversion Kit for PS360EWB/WB70 with
Midco Burner, Natural Gas to Propane, 1/98 ....... 131
Instructions for Service Kit 36863 - Gas
Conversion Kit for PS360EWB/WB70 with
Midco Burner, Propane to Natural Gas, 1/98 ....... 135
Equivalent Orifice Sizes at High Altitudes, 4/02 . 139
XI. Electric Oven Heating System ................................................ 140
A. PS200-series ovens ........................................................ 140
B.
PS310/360-series ovens ................................................ 142
C.
PS555 ovens.................................................................... 144
D.
Electric Oven Mercury Contactor Replacement ............ 146
Section 4 - Electrical Wiring Diagrams ............................................ 149
I.
Component Wiring.................................................................... 149
A. Temperature Controllers .................................................. 149
B.
Ignition Modules ............................................................... 150
II.
PS200-series Ovens ............................................................... 151
III.
PS310/360-series Ovens ........................................................ 160
IV. PS555/570-series Ovens ........................................................ 166
Section 5 - Reference ..................................................................... 172
25-point preventative maintenance checklist....................... 172
Fractional inches to decimal and millimeter equivalents ... 173
Decimal equivalents of drill sizes ......................................... 173
General conversion factors ................................................... 174
Pressure conversions ............................................................ 174
Pressure conversion chart..................................................... 175
Ohms Law equation wheel .................................................... 175
Common electrical wiring diagram symbols ........................ 176