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Middleby Marshall PS200 Series Technical & Service Manual

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  • Page 2 © 2002 Middleby Marshall, Inc. is a registered trademark of Middleby Marshall, Inc. All rights reserved. Middleby Cooking Systems Group • 1400 Toastmaster Drive • Elgin, IL 60120 • (847) 741-3300 • FAX (847) 741-4406 • 24-Hour Service Hotline (800) 238-8444...

  • Page 3: Table Of Contents

    POWER SUPPLY BEFORE SERVICING. NOTICE During the warranty period, ALL parts replacement and servicing should be performed by your Middleby Marshall Authorized Service Agent. Service that is performed by parties other than your Middleby Marshall Authorized Service Agent may void your warranty. NOTICE Using any parts other than genuine Middleby Marshall factory manufactured parts relieves the manufacturer of all warranty and liability.
  • Page 4 TABLE OF CONTENTS (continued) III. High Limit Control Module ............45 Troubleshooting Flowcharts ........... 103 Part Number Reference - High Limit Control Modules ..45 • Intermittent Pilot System Troubleshooting Table 103 Location ................45 • No Spark, System Does Not Work ......104 Troubleshooting ..............

  • Page 5: Section 1 - Sequence Of Operation

    SECTION 1 SEQUENCE OF OPERATION GAS OVEN SEQUENCE OF OPERATION Note that the electrical systems will still be “live” if the switch is open, although the oven cannot operate.
  • Page 6 NOTE: Most PS200-Series and PS360-series gas ov- ens use the high limit feature of the Temperature Con- troller. All other oven models use a separate High Limit Control Module. Refer to the wiring diagram for the appropriate oven model to check whether a separate High Limit Control Module is used.

  • Page 7: Electric Oven Sequence Of Operation

    Note that the electrical systems will still be “live” if the switch is open, although the oven cannot operate. NOTE: Electric oven models use a separate High Limit Control Module.

  • Page 8: Section 2 - Air Flow And Heat Transfer

    SECTION 2 AIR FLOW AND HEAT TRANSFER TYPES OF HEAT TRANSFER Conduction Radiation II. BLOWERS AND BLOWER SPEED PS200-series ovens Convection Figure 1 Blowers, belts and pulleys PS360-series PS555/570-series PS200-series Early (PS570) Current (PS570S, PS570G, all PS555) Blower Wheel Blower Wheel Orientation Orientation...

  • Page 9: Ps360-Series Ovens

    PS360-series ovens III. AIR FINGERS PS555/570-series ovens Figure 3 PS300/350 air finger with shutter plate Outer plate Lower air fingers have wire rack as shown to prevent conveyor belt from rubbing on outer plate. Figure 2 Rivets Air finger operation Inner plate Shutter Hot air flow...

  • Page 10: Configuration And Alignment

    B. Configuration and Alignment C. Performing a Test Bake 3D air finger label or card. Internal air finger chart. Figure 5 Figure 6 3D air finger label (if present) Internal air finger chart NOTE: All ovens use a chart of this type inside the machinery compartment.

  • Page 11: Ps300/350 Air Finger Shutter Adjustment

    Figure 7 Front-to-back uneven bake NOTE: In this example, the front of the product is darker than the rear. The opposite condition is also possible. D. PS300/350 Air Finger Shutter Adjustment...
  • Page 12 NOTE: NOTE: IMPORTANT: Aluminum 1/8” pop rivets are ideal for use here. They are much easier to drill out VERY IMPORTANT: When the ovens were shipped than stainless steel rivets. from the factory, all of the shutters were pre-ad- justed for their location within the oven. AII parts of the fingers must be marked as explained above and reassembled into their original position.

  • Page 13: Oven Capacity

    IV. OVEN CAPACITY B. Belt Time trailing edge to trailing edge A. Conveyor Speed and Bake Time C. Time of Delivery (TOD) leading edge to lead- leading edge to trailing edge ing edge Figure 9 - Conveyor Speed (Bake Time) Figure 10 - Belt Time Conveyor Speed Belt Time...

  • Page 14: Section 3 - Troubleshooting And Servicing Components I. Conveyor Speed Controller And Drive Motor

    SECTION 3 SERVICING COMPONENTS CONVEYOR SPEED CONTROLLER AND DRIVE A. Part Number Reference - Speed Controllers MOTOR Original-style speed controller with interchangeable mi- crocomputer and thumbwheel. Description 28174-0004 PS360 controller, yellow (12A) microcomputer 28074-0006 PS360 microcomputer, yellow (12A) 27170-0232 PS360 microcomputer w/emulator, yellow (12A) 28074-0007 PS314 controller, orange (13A) microcomputer 28074-0008...

  • Page 15: Part Number Reference - Pickup Assemblies

    B. Part Number Reference - Pickup Assemblies Figure 14 PS350-style pickup assembly PS350-style pickup assembly or old-style pickup as- sembly (see Figures 14-15). (used on early PS360) Description 28074-0005 Pickup assembly, PS350-style or old-style Current-style pickup assembly (see Figures 16-17) Description 27170-0263 Pickup assembly, current...

  • Page 16: Controller/Motor Failure

    Figure 16 Figure 17 Current pickup assembly - side view Current pickup assembly - end view Components needed for the field tester: D. Controller/Motor Failure CAUTION: DO NOT turn the conveyor switch ON while the field tester is connected! Figure 18 Field Tester for Conveyor Drive Motor or circuit breaker...

  • Page 17: Basic Troubleshooting Flowcharts

    E. Basic Troubleshooting Flowcharts 1. IF THE GEAR MOTOR RUNS AT FULL SPEED: NOTE:...

  • Page 18: X95; If The Conveyor Will Not Run At All

    2. IF THE GEAR MOTOR WILL NOT RUN AT ALL: NOTE:...

  • Page 19: Initial Troubleshooting

    F. Initial Troubleshooting Connections are reversed if conveyor direc- tion is reversed. 120VAC supply. Wire colors vary by oven model. 3 mins. 84VDC 67VDC 4 mins. 63VDC 50VDC 5 mins. 51VDC 40VDC 6 mins. 43VDC 34VDC 7 mins. 37VDC 28VDC 8 mins.

  • Page 20: Conveyor Control Pickup Test

    G. Conveyor Control Pickup Test H. Conveyor Motor Test Replacing the Magnetic Pickup J. Unshielded Pickup Wires on Early PS360-series ovens Figure 19 Connections for pickup test Old Wiring Shielded Cable Brown Black Orange Ye l l o w White...

  • Page 21: Conveyor Sensor Wiring Changes For Ps360-Series And Ps570S, 10/95

    Figure 20 Wiring for PS360 Shielded Pickup Cable - early terminal block design Figure 21 Wiring for PS360 Shielded Pickup Cable - late terminal block design K. Appendices Appendix - Conveyor sensor wiring changes for PS360-series and PS570S, 10/95...

  • Page 22: Service Bulletin Mm-133B - Installation Instructions For Conveyor Speed Controller Kit With Thumbwheel, P/N 42810-0133, 4/95

    Appendix - Service Bulletin MM-133B - Installation Instructions for Conveyor Speed Controller Kit with Thumbwheel, P/N 42810-0133, 4/95...
  • Page 23 Appendix - Service Bulletin MM-133B - Installation Instructions for Conveyor Speed Controller Kit with Thumbwheel, P/N 42810-0133, 4/95...

  • Page 24: Speed Controller Kit With Thumbwheel, 4/95

    Appendix - Instructions for Service Kit 42810-0133- Conveyor Speed Controller Kit with Thumbwheel, 4/95...
  • Page 25 Appendix - Instructions for Service Kit 42810-0133- Conveyor Speed Controller Kit with Thumbwheel, 4/95...
  • Page 26 Appendix - Instructions for Service Kit 42810-0133- Conveyor Speed Controller Kit with Thumbwheel, 4/95...
  • Page 27 Appendix - Instructions for Service Kit 42810-0133- Conveyor Speed Controller Kit with Thumbwheel, 4/95...

  • Page 28: Service Bulletin Mm-177 - Introduction And Compat- Ibility Of Conveyor Speed Controller With Digital Display, P/N 37337, 8/00

    ONLY for PS200R68-series ovens. • The new speed controller and digital display are already in use on Middleby Marshall PS555 ovens; so, your Agency may already have some of these components in stock. Please check your exist- ing stock of these components before placing addtional orders.

  • Page 29: Instructions For Service Kit 44756 - Conveyor Speed Controller Kit For Ps200R68-Series Ovens, 2/02

    Instructions, PS200R68-series oven conveyor speed controller kit This Service Kit will update one Middleby Marshall PS200R68, PS220R68, or PS224R68 oven to operate using the current digital conveyor speed controller with keypad display (P/N 37337), instead of the previous controller with thumbwheel adjustment (P/N 42810-0133).

  • Page 30: Service Bulletin Mm-189 - New Conveyor Gear Motors, Brushes, And Pickup Clamps, 8/01

    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.

  • Page 31: With Digital Display (P/N 37337), 4/02

    Appendix - DIP switch settings for Conveyor Speed Controller with Digital Display (P/N 37337), 4/02 II. TEMPERATURE CONTROLLER On electric ovens with variable pulse heater activation On gas ovens with On-Off gas valve operation Note that temperature controller P/N 46837 On gas ovens with modulated gas valve (PID) opera- (inc.

  • Page 32: Part Number Reference - Temperature Controllers

    A. Part Number Reference - Temperature Controllers • P/N 28071-0012 (A) • P/N 30871 (E) Used on early PS360WB70 and some CE oven • P/N 28071-0018 (A) models. • P/N 32571 (E) • P/N 34983 (B) Used on early PS360EWB. Used on PS200VL-series ovens only.

  • Page 33: Description

    B. Description VERY IMPORTANT: Part Number Reference Thermocouples E. Appendices Appendix - Temperature controller terminal cross-reference, 4/02...

  • Page 34: Temperature Controller Kit, 2/02

    Middleby Cooking Systems Group • 1400 Toastmaster Drive • Elgin, IL 60120 (847) 741-3300 • FAX (847) 741-4406 Middleby Corporation Service Hotline 1-800-238-8444 © 2002 Middleby Marshall. P/N 47322 • Rev. A • V2 • 2/02 Page 1 of 10...

  • Page 35: Controller Types

    Appendix - Instructions for Service Kit 47321 - Digital Temperature Controller Kit, 2/02 Controller Types This Kit includes one Digital Temperature Controller (P/N 46837) that can operate at 120-240V, and can be programmed to operate in on-off, PID, or variable pulse modes. The Controller is shown in Figure 1G, below.

  • Page 36: Before You Begin

    Appendix - Instructions for Service Kit 47321 - Digital Temperature Controller Kit, 2/02 WARNING BEFORE PERFORMING ANY SERVICE WORK, THE ELECTRICAL POWER SUPPLY AND THE GAS SUPPLY MUST BE TURNED OFF. Before you Begin 1. This Temperature Controller requires a current-version thermocouple for proper operation. Check that the thermocouple(s) installed in the oven match the current three-lead, flanged versions BE- FORE you begin to install the Temperature Controller.

  • Page 37: Electrical Connections

    Appendix - Instructions for Service Kit 47321 - Digital Temperature Controller Kit, 2/02 5. Check that the new controller is mounted into its sleeve. Then, slide the assembly into the opening in the panel from the outside. Check that the controller is upright, with the display on top and the keypad on the bottom.
  • Page 38 Appendix - Instructions for Service Kit 47321 - Digital Temperature Controller Kit, 2/02 Figure 4a Figure 4b Analog temperature controller (P/Ns Analog temperature controller 28071-0012 and 28071-0018) terminals (P/N 34983) terminals New temperature New temperature controller terminals controller terminals Not used. PS200VL ovens have a sepa- used rate high limit module...

  • Page 39: Jumper Setting

    Appendix - Instructions for Service Kit 47321 - Digital Temperature Controller Kit, 2/02 Jumper Setting Loosen the Phillips screw at the bottom center of the faceplate. Then, pull the controller out of its sleeve. Next, access the jumper shown in Figure 6. This jumper affects the signal that is output from Terminals 15 and 16.
  • Page 40 Appendix - Instructions for Service Kit 47321 - Digital Temperature Controller Kit, 2/02 Page 7 of 10...

  • Page 41: Diagnostic Error Messages

    Appendix - Instructions for Service Kit 47321 - Digital Temperature Controller Kit, 2/02 Diagnostic Error Messages The controller runs background tests during normal operation. If any problems occur during the tests, an error message flashes in the display. A listing of these diagnostic error messages is shown below. 1.

  • Page 42: Operating Instructions (To Be Left With Customer After Installation)

    Appendix - Instructions for Service Kit 47321 - Digital Temperature Controller Kit, 2/02 Digital Temperature Controller P/N 46837 Operating Instructions Display "HEAT ON" Light Shows the Set Point or Lights when the Actual Tempera- burner or heating ele- ture in degrees Fahr- ments, as appropriate enheit (F) or Celsius for the oven model,...

  • Page 43: 741-3300 • Fax (847) 741-4406

    Appendix - Instructions for Service Kit 47321 - Digital Temperature Controller Kit, 2/02 Middleby Cooking Systems Group • 1400 Toastmaster Drive • Elgin, IL 60120 (847) 741-3300 • FAX (847) 741-4406 Middleby Corporation Service Hotline 1-800-238-8444...
  • Page 44 Appendix - Service Bulletin MM-136 - Electrical Noise Filter Capacitor Assembly on Temperature Controllers, 9/93...
  • Page 45 Appendix - Service Bulletin MM-136 - Electrical Noise Filter Capacitor Assembly on Temperature Controllers, 9/93...

  • Page 46: High Limit Control Module

    III. HIGH LIMIT CONTROL MODULE C. Operation and Troubleshooting Thermocouples Figure 23 - High limit control modules (Shown in PS360-series oven) United Electric Type 54 high limit control module A. Part Number Reference - High Limit Control Mod- ules Description 28071-0002 United Electric Type 54 high limit control module No longer available - upgrade to current model...

  • Page 47: Appendices

    2001327 Nut, 6-32 TOOLS REQUIRED Figure 1 • Drill with 3/16” drill bit • Middleby Marshall Thermocouple Signal Source United Electric Type 54 Generator (P/N 27170-0192) High Limit Control • Wire cutters/strippers A. OVERVIEW This Service Kit is used to replace two different types of...
  • Page 48 Appendix - Instructions for Service Kit 39733 - High Limit Conversion Kit for PS300, 310, 350 & 360 Ovens, 5/99 B. INSTALLATION WARNING BEFORE PERFORMING ANY SERVICE WORK, THE GAS SUPPLY (IF SO EQUIPPED) AND THE ELECTRICAL SUPPLY TO THE OVEN MUST BE TURNED OFF. 1.
  • Page 49 Appendix - Instructions for Service Kit 39733 - High Limit Conversion Kit for PS300, 310, 350 & 360 Ovens, 5/99 Figure 2 High limit thermocouple location - lower oven High limit thermocouple location - upper oven Figure 3 Figure 4 NOT TO SCALE Figure 5 Figure 6...
  • Page 50 Appendix - Instructions for Service Kit 39733 - High Limit Conversion Kit for PS300, 310, 350 & 360 Ovens, 5/99 C. WIRING For the various wiring connections listed below, cut the kit-supplied #18 AWG wires to length. Refer to Figures 7 and 8 (on pages 6 and 7) for diagrams of the wiring connections. Lighted Reset Switch Wiring and Installation 14.
  • Page 51 22. Remove the thermocouple wires from the “TC +” and “TC -” terminals on the high limit control. 23. Attach a Middleby Marshall Thermocouple Source (P/N 27170-0263) to the “TC +” and “TC -” termi- nals on the high limit control, in place of the thermocouple wires. Note that it may be necessary to attach a pair of terminal connectors to the leads of the Thermocouple Source to allow them to connect to the high limit control’s terminals.
  • Page 52 Appendix - Instructions for Service Kit 39733 - High Limit Conversion Kit for PS300, 310, 350 & 360 Ovens, 5/99 Page 6 of 8...
  • Page 53 Appendix - Instructions for Service Kit 39733 - High Limit Conversion Kit for PS300, 310, 350 & 360 Ovens, 5/99 Page 7 of 8...
  • Page 54 Appendix - Instructions for Service Kit 39733 - High Limit Conversion Kit for PS300, 310, 350 & 360 Ovens, 5/99 A MIDDLEBY COMPANY Middleby Cooking Systems Group • 1400 Toastmaster Drive • Elgin, IL 60120 • USA • (847) 741-3300 • FAX (847) 741-4406 Middleby Corporation Service Hotline 1-800-238-8444 www.middleby.com Page 8 of 8...

  • Page 55: Thermocouples

    IV. THERMOCOUPLES Figure 24 - Thermocouples Cable (3 leads) flange Current 3-lead thermocouple Cable (2 or 4 leads) Obsolete 2-lead or 4-lead thermocouple clip A. Part Number Reference - Thermocouples Description B. Thermocouple Functions C. Troubleshooting...
  • Page 56 Junction Temperature Figure 24 - Thermocouple millivolt readings at various operating and junction temperatures...

  • Page 57: Appendices

    PS200 Series - before 2/96, serial numbers before ASH-0001 ... 2 connections (no terminal blocks) ............8 PS200 Series - 2/96 or later, serial numbers after ASH-0001 ..... 2 PS555 Electric and PS555E ............... 9 PS360 Series rear wall thermocouples - before 2/96, serial PS570 (X01-X05 name plate ID numbers) and PS570S numbers before ASH-0001 ..............

  • Page 58: Ps200 Series - Before 2/96, Serial Numbers Before Ash-0001

    Controller 6. Route the thermocouple leads away from the ignition Shielded cable. Connect the leads as shown in Figure 2. ground lead PS200 Series - 2/96 or later, serial numbers after ASH-0001 Shielded White ground lead Thermocouples on these ovens are located in the same position as the earlier PS200 models described above.

  • Page 59: Ps360 Series Rear Wall Thermocouples - Before 2/96, Serial Numbers Before Ash-0001

    Appendix - Instructions for Service Kits 33984 and 33985 - Oven Thermocouple Kit, 11/01 PS360 Series rear wall thermocouples - Figure 3 Thermocouple Installation - PS360 Series before 2/96, serial numbers before ASH-0001 Clamp (remove Thermocouples on these ovens are located on the rear wall and discard if of the baking chamber.

  • Page 60: Machinery Compartment

    Appendix - Instructions for Service Kits 33984 and 33985 - Oven Thermocouple Kit, 11/01 PS360 Series front-mounted thermocouple Figure 5 Thermocouple Installation - PS360 Series inside the machinery compartment Machinery Compartment These thermocouples are mounted in a tube that extends diagonally up and into the plenum chamber.

  • Page 61: Ps536

    Appendix - Instructions for Service Kits 33984 and 33985 - Oven Thermocouple Kit, 11/01 PS536 Figure 7 Thermocouple Installation - PS536 Thermocouples on these ovens are located inside the ma- chinery compartment. They are secured in place by a sheet metal screw that traps the thermocouple flange against the Sheet metal...
  • Page 62 Appendix - Instructions for Service Kits 33984 and 33985 - Oven Thermocouple Kit, 11/01 PS555 Gas - thermocouples with screw ter- 3. Disconnect the thermocouple leads. Refer to Figure 9. minal connections (no terminal blocks) • High limit thermocouples are wired directly to the high limit control module.

  • Page 63: Ps555 Electric And Ps555E

    Appendix - Instructions for Service Kits 33984 and 33985 - Oven Thermocouple Kit, 11/01 PS555 Electric and PS555E Note that all of the rear wall thermocouples are con- nected to the terminal block inside the left blower mo- Temperature-sensing thermocouples on these ovens are lo- tor compartment.

  • Page 64: Ps570 (X01-X05 Name Plate Id Numbers) And Ps570S (Early) With Side-Mounted Thermocouples Inside Or Outside The Blower Motor Compartments

    Appendix - Instructions for Service Kits 33984 and 33985 - Oven Thermocouple Kit, 11/01 PS570 (X01-X05 name plate ID numbers) and 7. Refer to Figure 11. Measure and scribe marks in the rear wall of the oven for drilling the thermocouple mount- PS570S (early) with side-mounted thermo- ing holes.
  • Page 65 Appendix - Instructions for Service Kits 33984 and 33985 - Oven Thermocouple Kit, 11/01 Figure 11 Location of New Thermocouple Mounting Holes - PS570, PS570S High limit thermocouple High limit thermocouple position for ovens with position for ovens with Thermocouple positions LEFT-TO-RIGHT conveyors RIGHT-TO-LEFT conveyors for non-Pizza Hut/Tricon ovens...

  • Page 66: Ps570S (Late) - Rear Wall Thermocouples With Left-Side And Right-Side Terminal Block Connections

    Appendix - Instructions for Service Kits 33984 and 33985 - Oven Thermocouple Kit, 11/01 PS570S (late) - rear wall thermocouples with 2. Remove the screws that hold the thermocouple to the wall. Slide the thermocouple out of its mounting hole. left-side AND right-side terminal block connec- tions 3.
  • Page 67 Appendix - Instructions for Service Kits 33984 and 33985 - Oven Thermocouple Kit, 11/01 Figure 14a Thermocouple Wiring - PS570S (Late) - Left to Right Conveyor Left Right Ground White White Ground White Terminal Terminal leads (temp) (temp) (temp) (temp) leads (all) (hi lim) (hi lim)

  • Page 68: Ps555G And Ps570G Rear Wall Thermocouples With Left-Side Terminal Block Connections

    Appendix - Instructions for Service Kits 33984 and 33985 - Oven Thermocouple Kit, 11/01 PS555G and PS570G rear wall thermocouples 2. Remove the screws that hold the thermocouple to the wall. Slide the thermocouple out of its mounting hole. with left-side terminal block connections 3.

  • Page 69: Blowers

    V. BLOWERS Figure 25 Early-style PS200 indirect drive assembly A. PS200-series ovens Direction of rotation (viewed from rear of oven) Figure 26 Current PS200 indirect drive assembly Air Pressure Safety Switch Early version components Part Number Description Direction of rotation (viewed from rear of oven) Figure 27...
  • Page 70 Figure 28 Bearing lubrication Grease fittings (1 per bearing, 2 total) IMPORTANT: Middleby uses two different types of grease in blower shaft bearings: • DuPont Krytox® grease is used in some PS536 ovens. Refer to Service Bulletin MM- 192 (included in the Appendices section of Figure 29 this chapter) for details on identifying Krytox®...
  • Page 71 NOTE: NOTE: IMPORTANT: Part Number Reference NOTE: NOTE: NOTE: NOTE: Blower Belt Tension Figure 31 Fan shaft alignment tool IMPORTANT: NOTE:...
  • Page 72 Figure 32 Bearing replacement and alignment - early-style PS200 fan shaft assembly Item Qty. Part Number Description Item Qty. Part Number Description Not available Back Wall Assembly 21651-0008 Square Key 1/8” 21216-0001 Screw, Hex Cap SS 3/8-16x1” 22071-0010 Flange Bearing, 5/8” Bore 21422-0001 Lock Washer, Split 3/8”...
  • Page 73 NOTE: NOTE: NOTE: NOTE: NOTE: NOTE: NOTE: NOTE: Blower Belt Tension Figure 33 - Four-point alignment test for correct pulley alignment Cord tied to shaft Cord must touch sheaves at four points indicated by arrows...
  • Page 74 Figure 34 Bearing replacement and alignment - current-style PS200 fan shaft assembly Item Qty. Part Number Description Item Qty. Part Number Description 37900-0068 Back Wall Assembly 27399-0003 Blower Fan, 16” Dia. 21216-0001 Screw, Hex Cap SS 3/8-16x1” 21419-0004 Flat Washer 3/8” SS Special 21422-0001 Lock Washer, Split 3/8”...

  • Page 75: Ps360-Series Ovens

    B. PS360-series ovens Figure 35 Blower motor fuses - single-phase motors Right motor Left motor fuses - 9A fuses - 9A Control fuse - 5A Blower Motor Centrifugal Safety Switch Figure 36 Blower motor fuses - three-phase motors Right motor Left motor fuses - 5A fuses - 5A...
  • Page 76 Figure 37 - Clockwise blower wheel Direction Heat slinger of rotation blades face motor IMPORTANT: Figure 40 Note slant of blades Inlet ring (rear view) Figure 38 - Counterclockwise blower wheel Direction Heat slinger of rotation blades face motor Note slant of blades (rear view) Figure 41 Figure 39 - Blower wheel placement...

  • Page 77: Ps555/570-Series Ovens

    A. PS555/570-series ovens Air Pressure Safety Switch Figure 42 - PS570/570S blower configuration Belt Blower Direction motor of rotation Pulley Bearing Blower Pulley Blower wheel shaft (inside oven) Figure 43 - PS555/570G blower configuration Belt Blower motor Pulley Bearing Blower Pulley Blower wheel shaft...
  • Page 78 Part Number Description Part Number Description Oven Blower Pulley Motor Pulley Belt Blower Application model Part No. Desc. Part No. Desc. Part No. Desc. Standard Pizza Hut Pizza Hut Intl. (Tricon) Domino’s “Q” Papa John’s NOTE:...
  • Page 79 Figure 45 PS500-series blower wheel orientation Clockwise: PS570: Counter- Open end of wheel faces IN Right end clockwise: Left end Part Number Reference Counter- PS570S, PS570G, PS555: Clockwise: Open end of wheel faces OUT clockwise: Left end Right end IMPORTANT: Middleby uses two different types of grease in blower shaft bearings: •...
  • Page 80 Figure 47 Blower belt tension and NOTE: repositioning the blower motor PS570, PS570S 1” (25mm) vertical deflection NOTE: PS570G, PS555 Loosen bolts to reposition motor and adjust belt tension Figure 48 - Four-point alignment test for correct pulley alignment Cord tied to shaft Cord must touch sheaves at four points indicated by arrows...

  • Page 81: Blower Motor Centrifugal Safety Switch (Ps360-Series)

    VI. BLOWER MOTOR CENTRIFUGAL SAFETY SWITCH VII. BURNER BLOWER MOTOR CENTRIFUGAL SAFETY (PS360-SERIES) SWITCH (PS200-SERIES GAS, PS310, PS314, PS360, PS360WB, PS570S) Air Pressure Safety Switch A. Part Number Reference - Blower Centrifugal Switch B. Troubleshooting Figure 49 - PS360-series blower motor centrifugal safety switch Switch...

  • Page 82: Air Pressure Safety Switch (Ps200-Series, Ps555/570- Series, Ps360Ewb, Ps360Wb70)

    VIII. AIR PRESSURE SAFETY SWITCH (PS200-SERIES, PS555/570-SERIES, PS360EWB, PS360WB70) Burner Blower Motor Centrifugal Safety Switch Figure 50 - Air pressure safety switch models Original-style round air switch Dungs square-case air switch with dial adjustment Replace with #2 Replace with same Positive pressure Adjustment dial...

  • Page 83: Troubleshooting

    B. Troubleshooting Figure 51 Figure 52 PS360WB70/EWB with Midco burner PS360WB70/EWB with Wayne burner Connects to negative pressure side of air switch Connects to positive pressure side of air switch...

  • Page 84: Appendices

    C. Appendices Appendix - Instructions for Service Kits 35624 and 35625 - Air Pressure Switch Replacement Kits, 1/97...
  • Page 85 Appendix - Instructions for Service Kits 35624 and 35625 - Air Pressure Switch Replacement Kits, 1/97...

  • Page 86: P/N 36194 With Service Kit P/N 35624, 3/97

    Appendix - Instructions to Replace an “Alternate” Air Switch P/N 36194 with Service Kit P/N 35624, 3/97...
  • Page 87 Appendix - Instructions to Replace an “Alternate” Air Switch P/N 36194 with Service Kit P/N 35624, 3/97...

  • Page 88: Ps570/570S Flame Gate

    IX. PS570/570S FLAME GATE B. Flame Gate Orientation A. Part Number Reference - Flame Gate Part No. Description Figure 53 PS570/570S flame gate adjustment LEFT-TO-RIGHT conveyor travel RIGHT-TO-LEFT conveyor travel (factory setting) (factory setting) Direction of Direction of conveyor travel conveyor travel Gate points to Gate points to...

  • Page 89: Gas Train And Burner System

    X. GAS TRAIN AND BURNER SYSTEM Figure 54 PS200-series gas train A. Part Number Reference - Gas Train Components Air shutter Burner blower and motor assy 42810-0087 OVENS WITH ON/OFF OVENS WITH GAS SYSTEM ONLY: MODULATING GAS 120V motor assy with centrifugal SYSTEM ONLY: safety switch 27170-0011 M420 modulating...
  • Page 90 Figure 56 PS360EWB or PS360WB70 gas train with Midco burner PS360WB70 PS360WB70 ONLY: Air tube ONLY: Solenoid valve, 3/4” (silicone rubber) Air shutter Bypass line 31500 22450-0297 36830 (1/4” aluminum (per foot) tubing) TO NEGATIVE (-) 15125-0002 SIDE OF AIR (per foot) SWITCH PS360EWB ONLY:...
  • Page 91 Figure 58 PS570S gas train Burner blower and motor assy, 120V OVENS RETROFITTED with centrifugal WITH MODULATING safety switch GAS SYSTEM ONLY: 27170-0011 M420 modulating valve, 1/2” 41647 Flexible air hose 22450-0255 1/2” union 23051-0003 Air shutter 42810-0087 NOT SHOWN (components are Pilot line installed on back wall...

  • Page 92: Part Number Reference - Gas Orifices And Gas Conversion Kits

    Figure 60 - Wayne burner - exploded view Pilot/ignitor assembly 42810-0117 Venturi Pilot shield Burner blower and motor assy Wtih angled flame target: 27170-0204 27170-0223 120V: 27170-0011 With round flame target: 208/240V: 27170-0287 38127 Air shutter 42810-0087 Main orifice Pilot orifice See chart below See chart below Pitot tube assembly...

  • Page 93: Component Identification

    C. Component Identification Solenoid valve vs. Modulating valve Burner type On-Off gas flow regulation. Solenoid Valve Modulated gas regulation. Part Number Reference - Burner Com- ponents Modulating Valve Figure 61 - Midco burner Figure 62 - Wayne burner PS360EWB shown. For different oven models, refer Burner blower to the drawings on pages 88-90.

  • Page 94: Pilot/Ignitor Assembly

    D. Pilot/Ignitor Assembly Figure 63 - Pilot/ignitor assembly Pilot line connects here Pilot burner Hood Ignitor/sensor Spark cable probe connects here Figure 64 End of burner without flame target showing pilot shield Pilot shield Figure 65 Flame targets Angled Round target target...
  • Page 95 Figure 66 Figure 67 - Flame rectification Flame structure Figure 68 - Pilot and probe Zone 1: Zone 2: Zone 3: Flame Rectification Voltage Gas Pressure • Natural gas, Wayne burner - 6-12” W.C. (14.9-29.9 mbar) • Propane, Wayne burner - 11½-12” W.C. (28.7-29.9 mbar) •...

  • Page 96: Burner Blower Motor

    Temperature Pilot Application The minimum value required is 2.0 mA. E. Burner Blower Motor Figure 69 Air shutter adjustment Wayne burner Counter- Loosen hex clockwise - Clockwise - nut to adjust more air less air shutter Burner Blower Motor Centrifugal Safety Switch Air Pressure Safety Switch F.

  • Page 97: Burner Transformer

    G. Burner Transformer H. Burner Motor Relay IMPORTANT: For proper functioning of the sole- noid valve, the temperature controller MUST be set to the on-off operating mode. Refer to Tem- perature Controller on Page 31. J. Bypass (Low Flame) Orifice (ovens with a high flame solenoid valve only) I.

  • Page 98: Modulating Gas Valve

    K. Modulating Gas Valve (if so equipped) IMPORTANT: For proper functioning of the modu- lating valve, the temperature controller MUST be set to the PID operating mode. Refer to Tempera- ture Controller on Page 31. L. Amplifier Board (ovens with a modulating gas valve only) Figure 71 - Modulating Gas System MUST BE SET TO PID...

  • Page 99: Combination Gas Control Valve

    M. Combination Gas Control Valve Pilot pressure Pilot and Proof of Flame Rectification Burrs in pilot adjustment portal Figure 72 - Combination Gas Control Valve Pressure regulator Regulated adjustment pressure (under cap s c r e w ) Inlet Pilot line pressure connection Pilot pressure...

  • Page 100: Ignition Module

    N. Ignition Module Appendices Figure 73 Wiring diagram of ignition and gas valve system (obsolete ignition module 27161-0004) Figure 74 Wiring diagram of ignition and gas valve system (current ignition module 27161-0005)

  • Page 101: Gas Conversion Kits

    O. Gas Conversion Kits P. Burner and Gas Train Troubleshooting Burner Blower Motor Part Number Reference - Gas Orifices and Gas Conversion Kits Burner Blower Motor Centrifugal Switch (or air pressure safety switch) Air Pressure Safety Switch Relay Appendices Main Gas Valve and Ignition Module Control Module Flame Sensor Test...
  • Page 102 Burner Operation Pilot Pres- sure Servicing the Combination Valve System Troubleshooting. Intermittent Pilot System Troubleshooting Table Check Grounding Component Checks Figure 75 Ignition Module Flame Sensor Circuit Test Voltage Checks for Ignition Module and Combination Gas Valve Ignition Module Combination Gas Valve NOTE:...

  • Page 103: Checking The Gas Pressures

    Component Checks Reset System After Lockout Check Spark Ignition Circuit Check Spark Igni- tion Circuit Q. Checking the Gas Pressures Inlet pressure Regulated pressure WARNING Do Not touch either stripped end of jumper or stud terminal. This is a very high voltage circuit and electrical shock can result.

  • Page 104: Troubleshooting Flowcharts

    R. Troubleshooting Flowcharts...

  • Page 108: Appendices

    S. Appendices Appendix - Instructions for Service Kit 42810-0117 - Pilot/Ignitor Kit, 7/91...

  • Page 109: X95; Instructions For Service Kit 30185 - Pilot Tee

    Appendix - Instructions for Service Kit 30185 - Pilot Tee, 3/94...
  • Page 110 Appendix - Instructions for Service Kit 30185 - Pilot Tee, 3/94...
  • Page 111 Appendix - Instructions for Service Kit 30185 - Pilot Tee, 3/94...
  • Page 112 Appendix - Instructions for Service Kit 30185 - Pilot Tee, 3/94...

  • Page 113: Combination Gas Valve, 1/92

    Appendix - Instructions for Service Kit 42810-0121 - Combination Gas Valve, 1/92...
  • Page 114 Appendix - Instructions for Service Kit 42810-0121 - Combination Gas Valve, 1/92...
  • Page 115 Appendix - Instructions for Service Kit 42810-0121 - Combination Gas Valve, 1/92...
  • Page 116 Appendix - Instructions for Service Kit 42810-0121 - Combination Gas Valve, 1/92...

  • Page 117: Ignition Module, 11/90

    Appendix - Instructions for Service Kit 42810-0114 - Ignition Module, 11/90...
  • Page 118 Appendix - Instructions for Service Kit 42810-0114 - Ignition Module, 11/90...

  • Page 119: During Burner Operation, 4/02

    Appendix - Position of Combination Gas Valve Components during Burner Operation, 4/02...

  • Page 120: For Ovens With Wayne Burner, Natural Gas To

    LATION SECTION OF THE OVEN’S OWNER’S OPERATING AND INSTALLATION MANUAL. WARNING THIS CONVERSION KIT IS TO BE INSTALLED BY A MIDDLEBY MARSHALL AUTHORIZED SERVICE AGENT IN ACCORDANCE WITH THE MANUFACTURER’S INSTRUCTIONS AND ALL CODES AND REQUIREMENTS OF THE AUTHORITY HAVING JURISDICTION. FAILURE TO FOLLOW INSTRUCTIONS COULD RESULT IN SERIOUS INJURY OR PROPERTY DAMAGE.
  • Page 121 Appendix - Instructions for All Gas Conversion Kits for Ovens with Wayne Burner, Natural Gas to Propane, 8/00 Typical PS200-series gas train configuration Burner blower Solenoid valve Pilot line Combination gas control valve (safety regulator) Burner Pilot pressure Bypass tap (pilot tee) line Gas pipe union Typical PS300-series gas train configuration...
  • Page 122 Appendix - Instructions for All Gas Conversion Kits for Ovens with Wayne Burner, Natural Gas to Propane, 8/00 PREPARATION AND DISASSEMBLY Figure 1 1. Turn off the electric power supply to the oven. 2. Turn off the gas supply at the service valve behind the oven.
  • Page 123 Appendix - Instructions for All Gas Conversion Kits for Ovens with Wayne Burner, Natural Gas to Propane, 8/00 IV. PILOT ORIFICE CONVERSION Figure 4 1. Unscrew the two 1/2" nuts that secure the gas train to Venturi the venturi mounting plate. See Figure 4. 2.
  • Page 124 Appendix - Instructions for All Gas Conversion Kits for Ovens with Wayne Burner, Natural Gas to Propane, 8/00 VII. GAS LEAK TEST VIII. INLET PRESSURE CHECK 1. Restore the electrical and gas utility connections to the 1. Using a manometer, check the inlet pressure at the inlet oven.
  • Page 125 Appendix - Instructions for All Gas Conversion Kits for Ovens with Wayne Burner, Natural Gas to Propane, 8/00 5. The pilot pressure should be adjusted as follows: X. MANIFOLD PRESSURE ADJUSTMENT • The current flow between the pilot hood and the 1.

  • Page 126: For Ovens With Wayne Burner, Propane To

    LATION SECTION OF THE OVEN’S OWNER’S OPERATING AND INSTALLATION MANUAL. WARNING THIS CONVERSION KIT IS TO BE INSTALLED BY A MIDDLEBY MARSHALL AUTHORIZED SERVICE AGENT IN ACCORDANCE WITH THE MANUFACTURER’S INSTRUCTIONS AND ALL CODES AND REQUIREMENTS OF THE AUTHORITY HAVING JURISDICTION. FAILURE TO FOLLOW INSTRUCTIONS COULD RESULT IN SERIOUS INJURY OR PROPERTY DAMAGE.
  • Page 127 Appendix - Instructions for All Gas Conversion Kits for Ovens with Wayne Burner, Propane to Natural Gas, 8/00 Typical PS200-series gas train configuration Burner blower Solenoid valve Pilot line Combination gas control valve (safety regulator) Burner Pilot pressure Bypass tap (pilot tee) line Gas pipe union Typical PS300-series gas train configuration...
  • Page 128 Appendix - Instructions for All Gas Conversion Kits for Ovens with Wayne Burner, Propane to Natural Gas, 8/00 PREPARATION AND DISASSEMBLY Figure 1 1. Turn off the electric power supply to the oven. 2. Turn off the gas supply at the service valve behind the oven.
  • Page 129 Appendix - Instructions for All Gas Conversion Kits for Ovens with Wayne Burner, Propane to Natural Gas, 8/00 IV. PILOT ORIFICE CONVERSION Figure 4 1. Unscrew the two 1/2" nuts that secure the gas train to Venturi the venturi mounting plate. See Figure 4. 2.
  • Page 130 Appendix - Instructions for All Gas Conversion Kits for Ovens with Wayne Burner, Propane to Natural Gas, 8/00 VII. GAS LEAK TEST VIII. INLET PRESSURE CHECK 1. Restore the electrical and gas utility connections to the 1. Using a manometer, check the inlet pressure at the inlet oven.
  • Page 131 Appendix - Instructions for All Gas Conversion Kits for Ovens with Wayne Burner, Propane to Natural Gas, 8/00 5. The pilot pressure should be adjusted as follows: X. MANIFOLD PRESSURE ADJUSTMENT • The current flow between the pilot hood and the 1.

  • Page 132: Instructions For Service Kit 36856 - Gas Conversion Kit For Ps360Ewb/Wb70 With Midco Burner, Natural Gas To Propane, 1/98

    Natural Gas to Propane Installation Instructions WARNING This conversion kit is to be installed by a Middleby Marshall Authorized Service Organization in accordance with the manufacturer’s instructions and all codes and requirements of the authority having jurisdiction. Failure to follow instructions could result in serious injury or property damage. The authorized service organization performing this work assumes responsibility for this conversion.
  • Page 133 Appendix - Instructions for Service Kit 36856 - Gas Conversion Kit for PS360EWB/WB70 with Midco Burner, Natural Gas to Propane, 1/98 2.2 Remove and retain the aluminum pilot tubing from the burner Figure 2 assembly. The end of the tubing that enters the combination gas Pilot orifice assembly control valve should be removed first.
  • Page 134 Appendix - Instructions for Service Kit 36856 - Gas Conversion Kit for PS360EWB/WB70 with Midco Burner, Natural Gas to Propane, 1/98 6. INLET PRESSURE CHECK 6.1 Check the gas control inlet pressure at the inlet pressure tap. See Figure 6. An inlet pressure of 6-14” (14.9-34.9mbar) is recommended for propane operation.
  • Page 135 Appendix - Instructions for Service Kit 36856 - Gas Conversion Kit for PS360EWB/WB70 with Midco Burner, Natural Gas to Propane, 1/98 9. CONVERSION LABELING Figure 7 Red “LPG.” label placement 9.1 Remove and discard the round, green “NAT.” label from the (on burner housing) front face of the burner plenum.

  • Page 136: Instructions For Service Kit 36863 - Gas Conversion Kit For Ps360Ewb/Wb70 With Midco Burner, Propane To Natural Gas, 1/98

    Propane to Natural Gas Installation Instructions WARNING This conversion kit is to be installed by a Middleby Marshall Authorized Service Organization in accordance with the manufacturer’s instructions and all codes and requirements of the authority having jurisdiction. Failure to follow instructions could result in serious injury or property damage. The authorized service organization performing this work assumes responsibility for this conversion.
  • Page 137 Appendix - Instructions for Service Kit 36863 - Gas Conversion Kit for PS360EWB/WB70 with Midco Burner, Propane to Natural Gas, 1/98 2.2 Remove and retain the aluminum pilot tubing from the burner Figure 2 assembly. The end of the tubing that enters the combination gas Pilot orifice assembly control valve should be removed first.
  • Page 138 Appendix - Instructions for Service Kit 36863 - Gas Conversion Kit for PS360EWB/WB70 with Midco Burner, Propane to Natural Gas, 1/98 6. INLET PRESSURE CHECK 6.1 Check the gas control inlet pressure at the inlet pressure tap. See Figure 6. An inlet pressure of 6-14” (14.9-34.9mbar) is recommended for natural gas operation.
  • Page 139 Appendix - Instructions for Service Kit 36863 - Gas Conversion Kit for PS360EWB/WB70 with Midco Burner, Propane to Natural Gas, 1/98 9. CONVERSION LABELING Figure 7 Yellow “NAT.” label placement 9.1 Remove and discard the round, red “LPG.” label from the front (on burner housing) face of the burner plenum.

  • Page 140: Equivalent Orifice Sizes At High Altitudes

    Appendix - Equivalent Orifice Sizes at High Altitudes (Includes 4% reduction for each 1000 ft. above sea level), 4/02...

  • Page 141: Electric Oven Heating System

    XI. ELECTRIC OVEN HEATING SYSTEM A. PS200-series ovens Part No. Description IMPORTANT: Because the PS200-series elec- tric oven uses an on-off system for heater acti- vation, the temperature controller MUST be set to the on-off operating mode. Refer to Tem- perature Controller on Page 30.
  • Page 142 NOTE: NOTE: Individual element electrical data Volts Watts Ohms Connection Figure 79 Removing elements Figure 78 Fan shroud removed Mounting s c r e w s...

  • Page 143: Ps310/360-Series Ovens

    B. PS310/360-series ovens Part No. Description IMPORTANT: Because the PS310/360-series electric oven uses an on-off system for heater activation, the temperature controller MUST be set to the on-off operating mode. Refer to Temperature Controller on Page 30. Figure 80 Figure 81 Removing the element bank mounting bolts Electrical leads disconnected...
  • Page 144 NOTE: NOTE: Individual element electrical data Volts Watts Ohms Connection Figure 82 Element bank removed - spacer bracket visible Spacer brackets...

  • Page 145: Ps555 Ovens

    C. PS555 ovens IMPORTANT: The PS555 electric oven uses a variable pulse system that is designed to emu- late the PID gas operating mode. Because of this, the temperature controller MUST be set to the PID operating mode. Temperature controller P/N 46837 (inc. with Service Kit 47321) includes a dedicated vari- able pulse mode intended for the PS536 elec- tric oven.
  • Page 146 NOTE: Figure 83 PS555 electric oven heating element removal Remote Lock terminal blocks w a s h e r Flat w a s h e r bolt Hex head s c r e w Hex head s c r e w Flat Heating w a s h e r...

  • Page 147: Electric Oven Mercury Contactor Replacement

    D. Mercury Contactor Replacement Figure 84 Part Number Reference Figure 85 Figure 86...
  • Page 148 Figure 87 Figure 88 Figure 89 NOTE:...
  • Page 149 Figure 90 Figure 91 NOTE: Figure 92...

  • Page 150: Section 4 - Electrical Wiring Diagrams

    SECTION 4 ELECTRICAL WIRING DIAGRAMS COMPONENT WIRING...

  • Page 152: Ps200-Series Ovens

    PS200-series gas oven (with solenoid valve and analog temp control), 208/240V main blower motor, 120V control circuit 208/240V, 50/60 Hz, 1 Ph, 3 pole, 4 wire supply (2 hot, 1 neutral, 1 ground)
  • Page 153 PS200-series gas oven (with solenoid valve and digital temp control), 208/240V main blower motor, 120V control circuit 208/240V, 50/60 Hz, 1 Ph, 3 pole, 4 wire supply (2 hot, 1 neutral, 1 ground)
  • Page 154 PS200-series gas oven (with modulating valve), 208/240V main blower motor and control circuit 208/240V, 50/60 Hz, 1 Ph, 2 pole, 3 wire supply (2 hot, 1 ground)
  • Page 155 PS200R68-series gas oven (with solenoid valve), 208/240V main blower motor, 120V control circuit 208/240V, 50/60 Hz, 1 Ph, 3 pole, 4 wire supply (2 hot, 1 neutral, 1 ground)
  • Page 156 PAGE 1 OF 2 PS200R68-series gas oven (with modulating valve), 208/240V main blower motor and control circuit 208/240V, 50/60 Hz, 1 Ph, 2 pole, 3 wire supply (2 hot, 1 ground)
  • Page 157 PAGE 2 OF 2 PS200R68-series gas oven (with modulating valve), 208/240V main blower motor and control circuit 208/240V, 50/60 Hz, 1 Ph, 2 pole, 3 wire supply (2 hot, 1 ground)
  • Page 158 PS200VL-series gas oven (with analog temp control 34983), 208/240V main blower motor, 120V control circuit 208/240V, 50/60 Hz, 1 Ph, 3 pole, 4 wire supply (2 hot, 1 neutral, 1 ground)
  • Page 159 PS200-series electric oven (USA version), 208/240V main blower motor and heating elements, 120V control circuit 208/240V, 50/60 Hz, 3 Ph, 4 pole, 5 wire supply (3 hot, 1 neutral, 1 ground)
  • Page 160 PS200-series electric oven (export version), 208/240V main blower motor and heating elements, 120V control circuit 220-240V, 50/60 Hz, 3 Ph, 3 pole, 4 wire supply (3 hot, 1 ground)

  • Page 161: Ps310/360-Series Ovens

    PS310/314/360/360WB gas oven (with analog temp control), 208/240V main blower motor, 120V control circuit 208/240V, 50/60 Hz, 1 Ph, 3 pole, 4 wire supply (2 hot, 1 neutral, 1 ground)
  • Page 162 PS310/314/360/360WB gas oven (with digital temp control), 208/240V main blower motor, 120V control circuit 208/240V, 50/60 Hz, 1 Ph, 3 pole, 4 wire supply (2 hot, 1 neutral, 1 ground)
  • Page 163 PS360WB70 gas oven (with Midco burner and solenoid valve), 208/240V main blower motor and control circuit 208/240V, 50/60 Hz, 1 Ph, 2 pole, 3 wire supply (2 hot, 1 ground)
  • Page 164 PS360EWB gas oven (with Midco burner and early temp control 32571), 208/240V main blower motor and control circuit 208/240V, 50/60 Hz, 1 Ph, 2 pole, 3 wire supply (2 hot, 1 ground)
  • Page 165 PS360EWB gas oven (with Wayne burner and temp control 36056 or 46837), 208/240V main blower motor and control circuit 208/240V, 50/60 Hz, 1 Ph, 2 pole, 3 wire supply (2 hot, 1 ground)
  • Page 166 PS360-series electric oven, 208/240V main blower motor and heating elements, 120V control circuit 208/240V, 50/60 Hz, 3 Ph, 4 pole, 5 wire supply (3 hot, 1 neutral, 1 ground)

  • Page 167: Ps555/570-Series Ovens

    PS570 or PS570S gas oven (with solenoid valve and analog temp control), 208/240V main blower motor, 120V control circuit 208/240V, 50/60 Hz, 1 Ph, 3 pole, 4 wire supply (2 hot, 1 neutral, 1 ground)
  • Page 168 PS570 or PS570S gas oven (with solenoid valve and digital temp control), 208/240V main blower motor, 120V control circuit 208/240V, 50/60 Hz, 1 Ph, 3 pole, 4 wire supply (2 hot, 1 neutral, 1 ground)
  • Page 169 PS570S gas oven (with modulating valve), 208/240V main blower motor, 120V control circuit 208/240V, 50/60 Hz, 1 Ph, 3 pole, 4 wire supply (2 hot, 1 neutral, 1 ground)
  • Page 170 PS555 gas oven (early), 208/240V main blower motor and control circuit 208/240V, 50/60 Hz, 1 Ph, 2 pole, 3 wire supply (2 hot, 1 ground)
  • Page 171 PS555G or PS570G gas oven, 208/240V main blower motor and control circuit 208/240V, 50/60 Hz, 1 Ph, 2 pole, 3 wire supply (2 hot, 1 ground)
  • Page 172 PS555 electric oven, 208/240V main blower motor, heating elements and control circuit 208/240V, 50/60 Hz, 3 Ph, 3 pole, 4 wire supply (3 hot, 1 ground)

  • Page 173: Section 5 - Reference

    SECTION 5 REFERENCE 25-point preventative maintenance checklist [ ] 1. Check and clean (blow out) machinery/control compartment. [ ] 2. Check and clean (blow out) main blower motors. [ ] 3. Check and clean (blow out and brush) axial fans. [ ] 4.

  • Page 174: Fractional Inches To Decimal And Millimeter Equivalents

    Fractional inches to decimal and millimeter equivalents Decimal equivalents of drill sizes...

  • Page 175: General Conversion Factors

    General conversion factors MULTIPLY TO OBTAIN MULTIPLY TO OBTAIN MULTIPLY TO OBTAIN feet/min ......0.5080 ..cm/sec. meters ......... 100 ..centimeters atmospheres (std. - 760mm of mercury feet/min ......0.01667 ..ft./sec. meters ........ 1000 ..millimeters feet/min ......0.01829 ..km/hr. meters ........

  • Page 176: Pressure Conversion Chart

    Pressure conversion chart Ohm’s Law equation wheel...

  • Page 177: Common Electrical Wiring Diagram Symbols

    Common electrical wiring diagram symbols...
  • Page 178 Common electrical wiring diagram symbols (continued)
  • Page 179 Common electrical wiring diagram symbols (continued)
  • Page 180 Common electrical wiring diagram symbols (continued)
  • Page 182 © 2002 Middleby Marshall, Inc. is a registered trademark of Middleby Marshall, Inc. All rights reserved. Middleby Cooking Systems Group • 1400 Toastmaster Drive • Elgin, IL 60120 • (847) 741-3300 • FAX (847) 741-4406 • 24-Hour Service Hotline (800) 238-8444...

This manual is also suitable for:

Ps220 seriesPs224 seriesPs310 seriesPs360 seriesPs555 seriesPs570 series

Table of Contents