BUNN® TECHNICAL TRAINING ITCB High Volume
Index Unit 1: Overview ITCB-DV Overview........................................................................................................................ 4 ITCB-DV HV Overview........................................................................................................................ 5 ITCB-DV HV Overview........................................................................................................................ 5 Unit 2: Machine Composition Exterior Overview............
Unit 1 OVERVIEW Unit Objectives Given an ITCB-DV, ITCB-DV HV, and an ITCB Twin HV, the learner will be able to perform the following tasks successfully: The learner will be able to discuss key features of the ITCB-DV. The learner will be able to discuss key features of the ITCB-DV HV. The learner will be able to discuss key features of the ITCB Twin HV. The learner will be able discuss similarities and differences between the three ITCB models.
BUNN ITCB (Infusion Series® Tea and Coffee Brewer) BUNN innovation makes it possible to brew iced tea, hot tea and hot or iced coffee from one model, the ITCB. Featuring BrewWISE® with pre-infusion and pulse brew technology, the Infusion Tea and Coffee Brewer gives the operator complete control over the brewing process. Recently, BUNN has modified the ITCB to accommodate high volume brewing. The ITCB-DV HV was designed to achieve a larger brew volume than the ITCB-DV.
Infusion Tea and Coffee High Volume Brewer Model: ITCB-DV HV Note: Bullet points will only list additional features of the machine when compared to the preceding model, which is the ITCB-DV. High Volume Transformation Includes: • Large 3-gallon (11.36 litre) tank provides back-to-back brewing capacity. • Brews 5.1 to 11.9 gallons (19.3 to 45 litres) of perfect coffee per hour and 26.7 gallons (10.2 litres) of iced tea per hour. • Includes both tea and coffee Smart Funnel®. • Includes hot water bypass.
Unit 2 Machine Composition 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 an operating machine the learner will be able to give a general explanation of how the BUNN ITCB HV brewer operates. The learner will be able to identify the functions of the main control board .
C Machine Composition A Exterior Overview G Product Outlets and Removable Parts A. User Interface B. Display C. Hot Water Outlet D. High Lime Sprayhead E. Dilution Nozzle F. Funnel Sensing Coil G. Data Plate H. Rail Locator I. Top Cover Vents J. Optional Hot Water Outlet K. Bypass Outlet L. Ventilation Hole On/off switch (on the right panel) B E J H F I L D K User Interface The user interface is a membrane switch adhered to the front of the brewer.
A. Programming (right) Pressing and holding this pad allows entry into the programming menus. Pressing and releasing the pad steps through each function screen while in the programming mode. B. Programming (left) This hidden pad can be used to scroll backwards through the function list while in programming mode. C. Brew A Switch When the ON/OFF is ON and the brewer is on the main screen (not in programming mode), momentarily pressing and releasing this pad will begin a brew cycle for regular coffee.
Rail Locators The rail locators are factory set to accommodate Thermal Fresh servers and TDO-N dispensers. The rails can be inverted to fit with regular tea dispensers by detaching the screws on the bottom of the brewer that secure the rails.
ITCB Twin HV Interior Overview Internal Components Dillution Hose Dual Dilution Solenoid Inlet Solenoid Transformer (Relocated) Thermistor Solenoid (Dispense Valve) Solenoid for Bypass System Realy 10 ITCB-DV HV Training 120 VAC Fan
Component Differences Review Transformer (Relocated) The purpose of relocating the transformer to the bottom base is to reduce the amount of heat being produced under the top hood panel. It’s the same 120/12 VAC transformer found in the ITCB-DV HV. 120 VAC Fan UL requirements state that ambient temperatures under the top hood panel must not exceed 158°F/70°C. The fan is meant to cool and maintain an operable temperature that is below the UL requirement.
Filling System The fill system maintains the level of water in the brewer’s tank. Anytime water is drawn off of the tank during a brew cycle or from the hot water outlet, the fill circuit activates to refill the tank. The fill system consists of: • 120VAC Solenoid Inlet Valve • Flow Control • Fill Probe To Dilution Nozzle Water enters the rear of the brewer from the supply line and first goes through a plastic strainer mounted in the combination inlet solenoid/dilution solenoid assembly.
Heating System The heating system consists of: • Water Tank • Heating Elements • High-limit Thermostat • Temperature Sensor • DV Switch The heating circuit maintains the water in the tank at a preset temperature this ensures that the water is always ready for brewing. Water for brewing is contained in a 3 gallon stainless steel tank. This tank contains a 1680W @ 120VAC heating element that is powered by the line voltage into the machine.
Dilution System The dilution system consists of: • Dilution Valve • .50 Flow Control • Dilution Nozzle The ITCB-DV HV can be programmed for quick brewing (without delay) or programmed with a dilution delay time under tea recipes. After or during the dispense of concentrate into the receiving vessel, the brewer will activate the dilute valve to begin the diluting process for the tea concentrate. The dilution valve is rated 120VAC and is mounted on the same body as the inlet valve.
The Smart funnel holds the ground coffee and is where the actual brewing process takes place. The wire basket in the funnel has a notch to allow the by-pass water to divert to the bottom of the funnel. The Smart funnel chip in the handle allows a brewer to communicate with a grinder via the funnel. The grinder will upload a recipe onto the funnel; the brewer can then receive that recipe once the funnel is in place.
Unit 3 Programming Unit Objectives Given an installed BUNN ITCB HV brewer, the learner will be able to complete the following tasks successfully. The learner will be able to access and scroll through the programming options. The learner will be able to perform calibrations using the programming options.
UNLOCK Setup and Programming LOCK Programming Lockout MEMORY If the programming cannot be access then the programming lockout switch is in the Lock position. The switch is located on the control board. Remove the top panel, locate the switch and place it into the Unlock position. PROGRAMMING LOCKOUT SWITCH P3048 Level 1 Programming Press the hidden switch for one second to access.
ENABLE ADS ? NO DONE YES ENABLE SANITATION NO DONE YES This function allows the operator to choose whether or not to display an advertising message. An ad can be saved to the brewer by either writing the ad using the programming commands, or by entering the ad into the brewer using an Ad Card. This message will be displayed when the brewer is not in use. This function allows the operator to enable the sanitation function and set the time before a cleaning alert will be displayed.
FUNNEL DETECT? NO DONE YES BREW ALERT? NO DONE YES ENTER SERVICE # NO YES SERVICE TOOLS NO YES FACTORY DEFAULTS NO YES Sets the inability to initiate a brew cycle if the funnel is not properly inserted into the funnel rails. By selecting yes to this option, a message will display alerting the operator that the machine is currently in a brew process. If enabled, the message will only display while the machine is brewing.
Calibrating the Bypass Flow Rate Step 1: Place the measuring container with a minimum capacity of 60 ounces beneath the funnel of the brewer. Water can also be dispensed into the server and then into the measuring container. Step 2: Press and hold the right hidden switch to enter level 2 programming. Continue to press the right hidden switch until the display reads CALIBRATE FLOW ?.
DILUTE OZ XX.X (-) DONE (+) NEW DILUTE FLOW Step 8: The display should now read “New Dilute Flow” along with the correct flow rate of the bypass in ounces per minute. After about 5 seconds, the display will return to the “Calibrate Flow?” screen. XX.X OZM 5 sec CALIBRATE FLOW? NO YES Master Tank Temp The Master tank temperature is the maximum temperature for the tank. The Set Recipe Temps allows the operator to set temperature for all recipes and will override the Master temp.
Unit 3 Troubleshooting 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. Given a list of error messages and issues, the learner will be to identify the probable cause of the message or issue.
Service Tools Like all digital brewers that BUNN manufactures, the ITCB-DV HV 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. The Service Tools option is located in Level 2 of the programming.
Test Switches TEST SWITCHES? NO YES Rightdisplay Hidden Switch Press any of the input buttons on the membrane switch, the will show which button is being pressed. ® ® ENABLE ENABLE ON//OFF OFF ON BREW BREW FULL BREW BREW AA BREW BREW BB BREW BREW CC HALF Test Frequency TEST FREQUENCY? NO YES The funnel sensing circuit is tuned to 125 kHz. If the circuit is not tuned correctly, then the funnel information will not be transferred to the brewer.
4. Check the ohms value of the thermistor located within the liquid level and ground wire harness connector. - If Check Fan message persists during operation, then you may have a defected thermistor or the machine is placed in a high ambient environment. Example: Machine is placed too close to equipment that is producing heat such as flood lights, ovens, ect. *An example of normal operating temperatures would be: 60°C/140°F under the top hood. Thermistor ohms value reading 2,488.
Triac Map (ITCB HV Twin) 8 7 6 5 3 4 1. Left Relay (Dilution) (TH1) 2. Inlet Valve (TH2) 3. Right Relay (Dilution) (TH3) 4. Heating Circuit (TH4) 5. Left Dispense Valve (TH5) 6. Right Dispense Valve (TH6) 7. Left Bypass Valve (TH7) 8.
