Bunn ITB Technical Training Manual
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Bunn ITB Technical Training Manual

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  • Page 2: Table Of Contents

    PM Steps ..........................17 Unit 5: Troubleshooting Service Tools ........................21 Test Outputs ......................... 21 Test Switches ....................... 22 Test Frequency ......................22 Service Fault Messages ..................... 22 Triac Map ..........................23 © 2009 Bunn-O-Matic Corporation. All Rights Reserved Rev. A...

  • Page 3: Unit 1: Installation

    nstallation Unit Objectives Given a realistic scenario depicting a new site install, the learner will be able to install and setup the brewer for retail turnover without error. Given a new machine, all the necessary tools and safety equipment, the learner will be able to install the brewer without error.

  • Page 4: Site Requirements

    • Counter able to support 100lbs. (operating weight of the brewer with a full 5 gallon tea server) • Level installation surface, brewer level on the surface Water Treatment • Sediment filtration to reduce large particles • Taste and odor filter to remove chlorine • Scale filtration as needed • For best results a BUNN Easy Clear filtration system should be used ® Plumbing • .75-11.5 NH (hose thread) fitting (¼” flare adapter included) • Dedicated water supply with shut-off • Connected to the cold water supply...

  • Page 5: Electrical Install

    WATER TEMP XXXXº Once the water temperature has reached the programmed Brew Lockout temperature it will display the ready screen. The machine will continue to heat until it reaches its programmed shut-off temperature. READY TO BREW WATER TEMP: 205º Bunn-O-Matic Corporation...

  • Page 6: Unit 2: Setup

    etup Unit Objectives Given a realistic scenario depicting a new site install, the learner will be able to install and setup the brewer for retail turnover without error. Given an installed machine, all the necessary tools and safety equipment, the learner will be able to set the machine up for initial operation.

  • Page 7: Setup And Programming

    ON- Represents dip switch is locked. Level 1 Programming Press the hidden switch for one second to access. BREW LOCKOUT ? This function allows the operator to prevent or allow brewing if the water temperature is less than the Set Ready temperature. DONE Bunn-O-Matic Corporation...

  • Page 8: Level 2 Programming

    The expiration time is the amount of time the product is allowed to sit in the server/ DONE dispenser before a fresh batch is brewed. This function allows the operator to adjust the sensitivity of the refill circuit. This is main- REFILL ly a troubleshooting feature. Water in different geographical locations can have different conductivities. By adjusting the sensitivity of the refill circuit, this will allow the brewer to DONE operate under various water conditions. This function allows the operator to view or enter the actual flow rate coming out of each SPRAY OZ/M: XX.X sprayhead. This is Not used to control the actual flow rate, but to tell the internal proces- DONE sor how fast the water is flowing. ITB Training Manual...
  • Page 9 Then press DONE. Step 7: The display should now read “New Spray Flow” along with the correct flow rate of the NEW SPRAY FLOW sprayhead in ounces per minute. After 5 seconds, the display will return to the “Calibrate Flow?” XX.X OZM screen. 5 sec CALIBRATE FLOW? Bunn-O-Matic Corporation...

  • Page 10: Uploading A Recipe Using A Recipe Card

    SELECT RECIPE Procedure to Disable a Brew Switch <-<-<-BREW SWITCH C Step 1: Follow the same procedure as above. Choose Disabled instead of recipe name. Step 2: Select DONE to disable that brew switch. "RECIPE NAME" DONE ITB Training Manual...

  • Page 11: Default Values

    DRIP TIME: 1:20 SELECT METHOD Master Temp 205º DONE EASY MANUAL Ready Degree 5º Enable Ads Disabled Enable Sanitation Disabled Enable EnergySavr Disabled Enable Fresh timer Disabled Refill Spray Oz. 24.0 Dilution Oz. 71.0 Set Recipe Temps Disabled Bunn-O-Matic Corporation...

  • Page 12: Unit 3: Machine Composition

    achine oMposition Unit Objectives Given a realistic scenario in which the learner has access to the machine’s internal components the learner will understand the composition and functions of the brewer. Given a realistic scenario requiring the learner to access the internal components of the machine the learner will be able to remove rear panel and top panel.

  • Page 13: Exterior Overview

    G. Batch Selector Pads Pressing the pad corresponding to the Half or Full batch selects the amount of product to be brewed. Pressing a different pad after a brew cycle has been initiated does not change the brew batch in progress. Light indicates the selected batch to brew. Also used in programming to adjust settings on both batch sizes. Bunn-O-Matic Corporation...

  • Page 14: Accessing The Inside Of The Brewer

    Accessing the Inside of the Brewer The majority of service work to the ITB brewer will require the removal of either the rear panel or the top panel. The top panel is secured with 1 flathead screw. The rear panel is secured with 7 flathead screws. Machine Function and Operations Main Control Board The main control is the brain of the brewer. In the Digital Brewer Control (DBC ) system, the control board is the ®...

  • Page 15: Dispensing System

    • Dilution nozzle The ITB can be setup as standard or quick brew. The brewer will dump water directly into the tea server to dilute the tea concentrate during the tea brew cycle. The dilution solenoid is a 120VAC valve mounted onto the same body as the inlet solenoid. During a tea brew cycle, the dilution solenoid will open; water will flow through a .50GPM flow...

  • Page 16: Unit 4: Preventive Maintenance

    reventive aintenance Unit Objectives Given a realistic scenario depicting a machine requiring a preventive maintenance, the learner will be able to identify which elements of a component need to be serviced without error. Given a machine, all the necessary tools and safety equipment, the learner will be able to identify the c omponents that need to be serviced for the PM.

  • Page 17: Preventive Maintenance

    In order to maintain proper operation and long service life BUNN recommends performing the preventative main- tenance every 6 months. Individual customers will vary with some customers choosing not to receive preventative maintenance. Tools Required: • Slotted screwdriver • Slip joint pliers • Needle nose pliers...
  • Page 18 □ Gently remove the tubing from the valve body. □ Using a flat blade screwdriver, remove the four screws and separate the valve assembly. □ Replace plunger, spring, and rubber seat using the rebuild kit BUNN P/N: 11517.0008. □ Clean any mineral build-up from the valve. □ Reassembly is the opposite of disassembly.
  • Page 19 □ Wash the entire outside surface of the dispenser with a clean damp cloth. Step 8: Clean the funnel: □ Unscrew the outlet tip and remove the tip and screen. □ Sanitize the tip, screen, and funnel with warm water and sanitize solution. Step 9: If customer has a BUNN water filtration system installed before the dispenser, replace the filter or filter car- tridge and record the service replacement date on the filter. Step 10: Calibrate the sprayhead and dilution flow rates. Bunn-O-Matic Corporation...

  • Page 20: Unit 5: Troubleshooting

    roubleshooting Unit Objectives Given a realistic scenario depicting a broken machine, the learner will be able to effectively troubleshoot, diagnosis, and repair the problem returning the machine to normal operation. Given a machine displaying an error message, all the necessary tools and safety equipment, the learner will be able to diagnosis the problem.

  • Page 21: Service Tools

    Service Tools The ITB brewer features on-board troubleshooting. Since all of the machine’s components are controlled or activated by the control board you can activate and test components individually from the user interface. This allows you to listen to solenoid valves opening, observing the flow of water or test to see if a component is receiving voltage using a meter.

  • Page 22: Test Switches

    The brewer features several error messages for problems occurring within the machine. These error messages will show up on the display. HEATING TIME This message will be shown if the control board does not see the programmed water temperature with 60 minutes. TOO LONG ITB Training Manual...

  • Page 23: Triac Map

    CBA. 1. TH1 = Left Dilution 2. TH2 = Refill / Inlet Water 3. TH3 = Brew 4. TH4 = Right Dilution 5. TH5 = Funnel Lock 6. TH6 = Sweetener 7. TH7 = Heater Triac Bunn-O-Matic Corporation...
  • Page 24 • Tank Heater 8.6 Ohms and Infinite to Ground/Chasis • Thermistor- 32º F. at 32651 Ohms, 70º F. at 11864 Ohms and 205º F. at 761 Ohms • Dual Valve/Coils 1130 Ohms Transformer supplies the low 12VAC to power the main control board Primary Side: Black and White (wires)120VAC Secondary Side: Yellow (wires) 12VAC ITB Training Manual...

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