Middleby Marshall CTX DZ26T Series Owner's Operating Manual
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Middleby Marshall CTX DZ26T Series Owner's Operating Manual

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OWNER'S
OPERATING
& INSTALLATION
MANUAL
CTX Electric Ovens
DZ26T/DZ33T/DZ55T-Series
© 2023 Middleby Marshall Inc.
is a registered trademark of Middleby Marshall, Inc. All rights reserved.
1
DZ26T/DZ33T/DZ55T-Series Electric Ovens: English
Combinations:
• Single Oven
• Double Oven (Two-Stack)
• Triple Oven (Three-Stack)
• Quad Oven (Four-Stack,
DZ33T & DZ55T Only)
P/N 77267 rev C

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  • Page 1 CTX Electric Ovens • Double Oven (Two-Stack) DZ26T/DZ33T/DZ55T-Series • Triple Oven (Three-Stack) • Quad Oven (Four-Stack, DZ33T & DZ55T Only) © 2023 Middleby Marshall Inc. is a registered trademark of Middleby Marshall, Inc. All rights reserved. P/N 77267 rev C...
  • Page 2 This manual must be kept in a prominent, easily reachable installing or servicing the equipment. location near the oven. Middleby Marshall suggests a service contract with a IMPORTANT Middleby Authorized Service Agent (ASA). An electrical wiring diagram for the oven is located inside DEFINITIONS the machinery compartment.
  • Page 3 Seller shall not be liable or lost profits of Buyer. for any prospective or lost profits of the buyer. This warranty is effective on Middleby Marshall equipment sold The foregoing shall be Seller’s sole and exclusive obligation and on, or after January 1st, 2007.

  • Page 4: Table Of Contents

    Table of Contents SECTION 1 DESCRIPTION ..........5 III. STEP-BY-STEP OPERATION ....... 28 MODEL IDENTIFICATION ........5 A. Daily Startup Procedure ......28 II. DZ26T/DZ33T/DZ55T SERIES SPECIFICATIONS . 6 B. Daily Shutdown Procedure ......30 III. COMPONENT FUNCTION ........7 IV.

  • Page 5: Section 1 Description

    SECTION 1 DESCRIPTION SECTION 1 DESCRIPTION I. MODEL IDENTIFICATION CTX DZ26T/DZ33T/DZ55T conveyor ovens are designed to cook, bake, or broil in high volume with consistent quality results. The CTX oven may be used either as a single oven or stacked for use as double or triple ovens.

  • Page 6: Dz26T/Dz33T/Dz55T Series Specifications

    SECTION 1 DESCRIPTION II. DZ26T/DZ33T/DZ55T SERIES SPECIFICATIONS RECOMMENDED MINIMUM CLEARANCES Rear of Oven to Wall - 0" (0mm) Left Side of Oven to Wall - 4" (102mm) Right Side of Oven to Wall - 4" (102mm) DZ26T/DZ33T/DZ55T SERIES ELECTRICAL SPECIFICATIONS Model No.

  • Page 7: Component Function

    SECTION 1 DESCRIPTION Components Locations III. COMPONENT FUNCTION A. Touch Screen Oven Controller The touch screen controller controls all functions of the oven. The cooking temperatures can be set from 200°F to 900°F (93°C to 509°C). Cooking times (conveyor speed) can be set from 1:00 minute to 60:00 minutes The controller features several modes including: •...

  • Page 8: Infrared Heating Panels

    SECTION 1 DESCRIPTION CTX Heat Zones B. Infrared Heating Panels Heating panels are positioned above and below the conveyor belt in the oven chamber (Figure 4). When energized these panels emit infrared long waves. These waves do not heat the air through which they pass.

  • Page 9: Section 2 Installation

    SECTION 2 INSTALLATION SECTION 2 INSTALLATION NOTE: All aspects of the oven installation, including WARNING placement, utility connections, ventilation Keep the appliance area free and clear of requirements, must conform with any applicable local, combustibles. national, international codes. These codes supersede the requirements and guidelines provided WARNING in this manual.

  • Page 10: Unloading, Dimensions, And Rough-In

    INSTALLATION I. UNLOADING, DIMENSIONS, AND C. Items for Stacking Oven ROUGH-IN The following items are required for stacking ovens: Your Middleby Marshall DZ26T/DZ33T/DZ55T-Series Quantity Description Oven is shipped partially assembled. It will arrive in a 10' (305cm) 4-by-4 boards carton on a crate.
  • Page 11 SECTION 2 INSTALLATION DZ26T Single Oven on a Base...
  • Page 12 SECTION 2 INSTALLATION DZ26T Double-Stacked Oven on a Base DZ26T Triple-Stacked Oven on a Base...
  • Page 13 SECTION 2 INSTALLATION DZ33T Single Oven on a Base...
  • Page 14 SECTION 2 INSTALLATION DZ33T Double-Stacked Oven on a Base DZ33T Triple-Stacked Oven on a Base...
  • Page 15 SECTION 2 INSTALLATION DZ33T Quad-Stacked Oven...
  • Page 16 SECTION 2 INSTALLATION DZ55T Single Oven on a Base...
  • Page 17 SECTION 2 INSTALLATION DZ55T Double-Stacked Oven on a Base DZ55T Triple-Stacked Oven on a Base...
  • Page 18 SECTION 2 INSTALLATION DZ55T Quad-Stacked Oven...
  • Page 19 SECTION 2 INSTALLATION DZ26T Single Oven Stand Parts Item Qty. Part Number Description 75219 INSUL, BASE PART A 75220 INSUL, BASE PART C 75221 INSUL, BASE PART B PARTS LISTED ABOVE ARE FROM 75218 KIT, DZ26T INSULATION 75213 WLDMT. BASE DZ33 73403 PANEL, TOP 66948...
  • Page 20 SECTION 2 INSTALLATION DZ33T Single Oven Stand Parts Item Qty. Part Number Description 67880 INSUL, BASE PART A 67881 INSUL, BASE PART C 67882 INSUL, BASE PART B PARTS LISTED ABOVE ARE FROM 69978 KIT, DZ33T INSULATION 67884 WLDMT. BASE DZ33 67614 PANEL, TOP 66948...
  • Page 21 SECTION 2 INSTALLATION DZ55T Single Oven Stand Parts Item Qty. Part Number Description 68316 INSUL, BASE PART A 67881 INSUL, BASE PART C 68317 INSUL, BASE PART B PARTS LISTED ABOVE ARE FROM 71770 KIT, DZ55T INSULATION 68314 WLDMT. BASE DZ55 68263 PANEL, TOP 66948...

  • Page 22: Base Section Assembly

    SECTION 2 INSTALLATION Oven Stand Parts D. Base Section Assembly sticking out of the oven equally on both sides. One of the boards should be placed to the rear of the 1. Locate the carton containing the oven base. oven and the other in the front of the oven. See Remove and inventory the contents.

  • Page 23: Stacking And Mounting Two Ovens

    SECTION 2 INSTALLATION NOTICE NOTICE Dispose of the skid in accordance with local Lift the oven with the 10' (305cm) 4-by-4 boards running through the oven only. DO NOT lift the regulations. oven by the conveyor. Damage WILL result. 7. Lift the oven high enough to position the stand under it.
  • Page 24 SECTION 2 INSTALLATION NOTICE NOTICE Make sure protective plastic film is removed from Make sure protective plastic film is removed from draft curtains before installation. exit shelves before installation. 1. Draft Curtains, stainless steel (2 per oven). These 2. Exit Shelves, stainless steel (2 per oven). These mount above the conveyor at the ends of the shelves mount in cantilever fashion at the exit and cooking chamber.

  • Page 25: Ventilation Guidelines

    SECTION 2 INSTALLATION UTILITY ROUGH-IN DIMENSIONS AND POSITIONING FOR DZ26T/DZ33T/DZ55T-SERIES OVEN WARNING Do not use conduit for ground connection. CAUTION It is recommended that the oven be placed under a ventilation hood for adequate air supply and ventilation. IMPORTANT Electric supply to be provided by customer. CIRCUIT BREAKER Separate circuit breaker with lockout/tagout electrical shutoff for each oven.

  • Page 26: Electrical Connection Information For Dz26T/Dz33T/Dz55T-Series Ovens

    SECTION 2 INSTALLATION III. ELECTRICAL CONNECTION INFORMATION FOR DZ26T/DZ33T/DZ55T-SERIES OVENS WARNING Authorized supplier personnel normally accomplish the connections for the ventilation system and electric supply, as arranged by the customer. Following these connections, the factory-authorized installer can perform the initial start-up of the oven. Check the oven data plate (Figure 21) before making any electric supply connections.

  • Page 27: Section 3 Operation

    SECTION 3 OPERATION SECTION 3 OPERATION I. CONTROL FUNCTIONS DZ26T/DZ33T/DZ55T-Series Oven Control Functions B. Circuit Breakers WARNING Possibility of injury from rotating parts and 3 amp circuit breakers provide overload protection for electric shock. the control circuit. Never disassemble or clean the oven with the C.

  • Page 28: Step-By-Step Operation

    SECTION 3 OPERATION Control Panel III. STEP-BY-STEP OPERATION Touch the large onscreen on/off button. The screen shows either the Manual Mode touch A. Daily Startup Procedure screen or the Preset Mode touch screen, depending on the mode the oven was in when last 1.
  • Page 29 SECTION 3 OPERATION Operating in Preset Mode: NOTE: If the Preset Mode touch screen shows the preset you want to use and “Ready” appears in the upper right, the oven has heated to the displayed temperatures and the conveyor is running at the displayed speed. The oven is ready to use.

  • Page 30: Daily Shutdown Procedure

    SECTION 3 OPERATION 5. When the Set Temperature screen appears, enter a new temperature (for example, 7 - 0 - 0). The new temperature appears in the green highlighted area of the Set Temperature screen. 6. In the lower right area of the screen, choose if you want to Save the new temperature to Left Only or Both.

  • Page 31: Touch Screen Adjustments

    SECTION 3 OPERATION IV. TOUCH SCREEN ADJUSTMENTS A. Setup Mode Entering the Setup Mode: 1. From the Manual or Preset main screen, touch the Setup button. The Passcode screen appears. 2. Enter the passcode 1 - 3 - 9 - 7. The number in the green highlighted area changes to 1397, then the Settings screen appears.
  • Page 32 SECTION 3 OPERATION Changing Temperature Unit: On the Settings screen, touch the Temp. Unit button to change between °F and °C. Changing Language: This feature is not operational at this time. Changing Volume: The Volume button allows the user to change the volume of the audible interface when buttons are touched.
  • Page 33 SECTION 3 OPERATION Making Changes to a Preset: 1. On the Settings screen, touch the Presets button. The Preset Change screen appears.
  • Page 34 SECTION 3 OPERATION 2. Touch the preset you want to change (for example, Preset 1). The chosen preset screen appears. 3. To change the name of the preset to a product, touch the Name button. A keyboard screen appears. 4. Enter the new name using the keyboard (for example, Chicken Breast).
  • Page 35 SECTION 3 OPERATION 8. In the lower right area of the screen, choose if you want to Save the new temperature to Left Only or Both. (If you had started with a right setting, the choice would be Right Only or Both.) The chosen preset screen reappears with the new temperature settings.

  • Page 36: Change Belt Direction

    SECTION 3 OPERATION 15. Press the Back button one more time to return to the Settings screen. NOTE: To change another Preset, touch the Preset button from the Settings screen and start the process again. Other Oven Settings On the “Other Oven Settings” screen the operator can change the belt direction.

  • Page 37: Standby Mode

    SECTION 3 OPERATION Exiting the Setup Mode: From the Settings screen, touch the Back button to return to the Preset Mode with the preset changed and saved. B. Standby Mode The Standby Mode is a feature which puts the oven into an additional energy-saving state which reduces the temperature by 25% during times when usage is slower.

  • Page 38: Info Mode

    SECTION 3 OPERATION C. Info Mode The Info Mode is a feature which shows the actual temperatures and belt speeds onscreen while operating. Viewing Information in Manual Mode: To view the actual temperatures and belt speeds in Manual Mode, touch the Info. button. The actual values appear in a smaller size above the settings.

  • Page 39: Quick Reference: Faults

    SECTION 3 OPERATION V. QUICK REFERENCE: FAULTS Fault messages are only displayed on the main screens of Manual Mode and Preset Mode. If a message is displayed, touch the screen to acknowledge the fault. MESSAGE DISPLAYED EXPLANATION CORRECTIVE ACTION IO_COMM_LOST* IO Communications Fault Acknowledge the fault.
  • Page 40 SECTION 3 OPERATION CONTROL High Temp: Control Compartment Check cooling proper COMPARTMENT HIGH operation and cleanliness. Clean the temperature control TEMP necessary (see compartment has exceeded the set limit for MAINTENANCE – WEEKLY). more than 5 seconds. The oven beeps, the Acknowledge the fault.

  • Page 41: Cooking In A Ctx Oven

    SECTION 3 OPERATION VI. COOKING IN A CTX OVEN NOTE: Sometimes an increase in temperature may require a corresponding decrease in cooking time. A. Cooking Trials Conversely a decrease in temperature may require a corresponding increase in cooking time. The purpose of conducting cooking trials is to determine the exact temperature settings and cooking After evaluating the results, make the indicated time needed to produce best results with your specific...
  • Page 43 SECTION 3 OPERATION Record Time and Temp Table Product Zone Temperatures Cook Time Pan Type and Amount State Min. Size Weight or Entrance Exit Count Top / Bott Top / Bott...
  • Page 44 SECTION 3 OPERATION NOTES...

  • Page 45: Section 4 Maintenance

    ANY replacement parts that require access to the heat curtain. interior of the oven may ONLY be replaced by a Middleby Marshall Authorized Service Agent. It is also strongly recommended that the 3-Month Maintenance and 6-Month Maintenance procedures in this section be performed ONLY by a Middleby Marshall Authorized Service Agent.
  • Page 46 SECTION 4 MAINTENANCE 4. Remove any crumbs 7. Remove the exit tray, with wire brush. wipe with a clean towel with general purpose cleaner, send through dishwasher (optional), dry and re-install. 5. Remove crumb 8. Vacuum/sweep tray. any crumbs inside of the oven.
  • Page 47 SECTION 4 MAINTENANCE 10. Wipe the top, front and sides with a clean towel with general purpose cleaner.

  • Page 48: Maintenance - Weekly

    SECTION 4 MAINTENANCE II. MAINTENANCE - WEEKLY 2. Touch “Yes” to confirm. The oven will begin to count time up until the oven attains a temperature Clean the filter of the cooling fan. of 900°F (482°C) as shown in Figure 25. The 1-hour timer will then begin to count down to zero.

  • Page 49: Maintenance - Every 3 Months

    Replacement parts for these kits can be purchased from your Middleby Marshall Authorized Parts Distributor. B. Ventilation Check that the air circulation throughout the oven is...
  • Page 50 SECTION 4 MAINTENANCE DZ26T-SERIES ELECTRIC OVEN KEY SPARE PARTS KIT (Figure 27) ITEM PART NO. DESCRIPTION DZ26T, 208/240V DZ26T, 380V 77174 Filter, Magnetic Fan M9616 Fan, Cooling 24VDC 74916 Switch, Schurter 3-101-431 74902 Display, NCC Touch Screen 76957 Contactor, Finder Type 22.34 67857 Relay, 240V 75A Solid State 45036...
  • Page 51 SECTION 4 MAINTENANCE DZ33T-SERIES ELECTRIC OVEN KEY SPARE PARTS KIT (Figure 28) ITEM PART NO. DESCRIPTION DZ33T, 208/240V DZ33T, 380/415V 77174 Filter, Magnetic Fan M9616 Fan, Cooling 24VDC 74916 Switch, Schurter 3-101-431 74902 Display, NCC Touch Screen 67975 Contactor 4 pole 67857 Solid state relay 45036...
  • Page 52 SECTION 4 MAINTENANCE DZ55T-SERIES ELECTRIC OVEN KEY SPARE PARTS KIT (Figure 29) ITEM PART NO. DESCRIPTION DZ26T, 208/240V DZ26T, 380V 77174 Filter, Magnetic 140mm Fan M9616 Fan, Cooling 24VDC 74916 Switch, Schurter 3-101-431 74902 Display, NCC Touch Screen 78210 Contactor, 208/240/50/60 4P 75A 67857 Relay, 240V 75A Solid State 45036...

  • Page 53: Section 5 Troubleshooting

    SECTION 5 TROUBLESHOOTING SECTION 5 TROUBLESHOOTING SYMPTOM PROBLEM SOLUTION Conveyor belt stops completely 1. Check for objects jammed in Check to see if drive roller is • or intermittently. conveyor and remove. turning. 2. Turn oven off, reset the circuit breaker, and turn oven on.
  • Page 54 SECTION 5 TROUBLESHOOTING NOTES...

  • Page 55: Section 6 Electrical Schematics

    SECTION 6 ELECTRICAL SCHEMATICS SECTION 6 ELECTRICAL SCHEMATICS Wiring Diagram, DZ26T, 208/240 3PH • 75324 REV B...
  • Page 56 SECTION 6 ELECTRICAL SCHEMATICS...
  • Page 57 SECTION 6 ELECTRICAL SCHEMATICS...
  • Page 58 SECTION 6 ELECTRICAL SCHEMATICS Wiring Diagram, DZ26T, 380V 3PH CE • 76982 REV B...
  • Page 59 SECTION 6 ELECTRICAL SCHEMATICS...
  • Page 60 SECTION 6 ELECTRICAL SCHEMATICS Wiring Diagram, DZ26T, 230V 1PH CE • 76983 REV B...
  • Page 61 SECTION 6 ELECTRICAL SCHEMATICS...
  • Page 62 SECTION 6 ELECTRICAL SCHEMATICS Wiring Diagram, DZ26T, 380/416V 3PH • 76984 REV B...
  • Page 63 SECTION 6 ELECTRICAL SCHEMATICS...
  • Page 64 SECTION 6 ELECTRICAL SCHEMATICS Wiring Diagram, DZ33T, E208-240V 3PH • 77316 REV B...
  • Page 65 SECTION 6 ELECTRICAL SCHEMATICS...
  • Page 66 SECTION 6 ELECTRICAL SCHEMATICS...
  • Page 67 SECTION 6 ELECTRICAL SCHEMATICS Wiring Diagram, DZ33T, 380V 3PH CE • 77318 REV B...
  • Page 68 SECTION 6 ELECTRICAL SCHEMATICS...
  • Page 69 SECTION 6 ELECTRICAL SCHEMATICS Wiring Diagram, DZ33T, 230V 1PH CE • 77320 REV B...
  • Page 70 SECTION 6 ELECTRICAL SCHEMATICS...
  • Page 71 SECTION 6 ELECTRICAL SCHEMATICS Wiring Diagram, DZ33T, 380/416V 3PH • 77322 REV B...
  • Page 72 SECTION 6 ELECTRICAL SCHEMATICS...
  • Page 73 SECTION 6 ELECTRICAL SCHEMATICS Wiring Diagram, DZ55T, 208/240 3PH • 78726 REV B...
  • Page 74 SECTION 6 ELECTRICAL SCHEMATICS...
  • Page 75 SECTION 6 ELECTRICAL SCHEMATICS...
  • Page 76 SECTION 6 ELECTRICAL SCHEMATICS Wiring Diagram, DZ55T, 380V 3PH CE • 78728...
  • Page 77 SECTION 6 ELECTRICAL SCHEMATICS...
  • Page 78 SECTION 6 ELECTRICAL SCHEMATICS Wiring Diagram, DZ55T, 230V 1PH CE • 78730...
  • Page 79 SECTION 6 ELECTRICAL SCHEMATICS...
  • Page 80 SECTION 6 ELECTRICAL SCHEMATICS Wiring Diagram, DZ55T, 380/416V 3PH • 78732...
  • Page 81 SECTION 6 ELECTRICAL SCHEMATICS...
  • Page 82 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.

This manual is also suitable for:

Ctx dz33t seriesCtx dz55t series

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