Bunn CEZF, CDBC service manual Water Sensing Threshold Adjustment Procedure

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CDBC-APS/TC/TS/TSR ADJUSTMENTS & OPTIONAL SETTINGS (cont)

Water Sensing Threshold Adjustment Procedure

1.Make sure the tank is full of water to be used for calibration. The water must be in contact with the refill probe.

2.Unplug the brewer from the power source, then press and hold the BREW button while power is reapplied.

3.Continue pressing the BREW button until the READY indicator begins to flash. Release the BREW button and then press it again momentarily.

4.The new calibration is automatically completed within a few seconds. If the water is too pure for use with the brewer, the READY indicator will flash very rapidly and the old calibration will be retained.

Pulse Brew Setup Procedure

The pulse brew parameters (initial fill time, off times, and remaining on times) are entered using the following set-by-example process.

1.First set the brew volume using the standard procedure in Brew Volume Setup.

2.Position an empty container under the sprayhead. Allow the tank to finish refilling. Make sure that the READY lamp is on, or that the BREW LOCKOUT function is turned off.

3.Press and hold the OFF/ON button. The brew valve will turn on after 10 seconds. Release the button. This begins the initial on-timesetting. When the spray has continued for the desired time, momentarily press the OFF/ON button.

4.The spray is now stopped and the off time setting has begun. Press the OFF/ON button momentarily to end the off time.

5.The spray is now on again and the remaining on time setting has begun. Press the OFF/ON button momentarily at the end of the desired remaining on time.

6.The setup is now complete and the parameters are stored in memory. The spray will continue the off and on cycles until the brew volume of step 1 is complete. Pressing the OFF/ON button again will terminate the brewing cycle, with the parameters stored in memory.

7.If only a preinfusion is desired, i.e. an initial on time followed by one off period, use the same procedure, but stop after step 4 and allow the brew to finish the volume set in step 1. This will store the initial on time and off time in memory.

Procedure for Disabling Pulse Brew or Preinfusion:

1.Position an empty container under the sprayhead. Allow the tank to finish refilling. Make sure that the READY lamp is on, or that the BREW LOCKOUT function is turned off.

2.Press and hold the OFF/ON button. The brew valve will turn on after 10 seconds. Release the button.

3.Allow the spray to continue and press no buttons until spray stops. The pulse and preinfusion functions are now disabled.

NOTE: When the brewer has been set up for pulse or preinfusion, the adjustment of brew volume is done the same as always and has no effect on the pulse brew parameters. The pulsing is temporarily disabled while adjusting the brew volume and automatically returns during normal brewing.

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Contents Phone 217 FAX 217 Post Office BOX SPRINGFIELD, IllinoisIntroduction ContentsUser Notices Electrical Requirements Plumbing RequirementsElectrical Hook-Up Brew Switch ON/OFF SwitchReady Indicator Operating ControlsCleaning Initial SET-UPCoffee Brewing Adjusting Brew Volumes CEZ-APS/TS/TSR Adjustments & Optional SettingsSetting Brew Temperature CDBC-APS/TC/TS/TSR Adjustments & Optional SettingsDisplaying Brew Temperature Setting Brew LockoutCDBC-APS/TC/TS/TSR Adjustments & Optional Settings Water Sensing Threshold Adjustment ProcedureBefore troubleshooting this brewer, check for the following TroubleshootingRefill Circuit Problem TroubleshootingProbable Cause Remedy2a. Water Level Probe Sensing System CDBC-APS/TS/TSR Troubleshooting Refill CircuitHeating Circuit Problem Probable Cause Remedy Water does not heat to proper temperatureWater not touching temperature probe Problem Probable Cause Remedy Troubleshooting Heating CircuitControl Board Cdbc & CEZ ContReplace the control board.See Pages 21Brewing Circuit Problem Probable Cause Troubleshooting Brewing Circuit Set-upinstructions Water temperatureDripping from sprayhead Lime build up RequiredProblem Probable Cause Dry coffee grounds remain Sprayhead FunnelFunnel loading Cause Things to Check DiagnosticsService Component AccessContents Control Board ServiceControl Board Service Control Board Model CEZ-APS/TS/TSRSwitch Panel Service Switch Panel Model CDBC-APS/TC/TS/TSRON/OFF Switch Wiring Brew Switch Wiring Service Brew Switch Start Model CEZ-APS/TS/TSRDispense Valve Dispense ValveLimit Thermostat Limit ThermostatTank Heater Tank HeaterTank Heater Wiring Service Tank HeaterCheck for continuity across the refill valve coil terminals Refill ValveLevelsingle Phase 120V AC 2 Wire 120/208V AC 3 Wire 120/240V AC 3 WireSchematic Wiring Diagram CEZ-APS/TS/TSR Cdbc 15, 20 & 35 APS/TC/TS 120V AC 2 Wire

CEZF, CDBC specifications

The Bunn CEZF and CDBC are two popular commercial coffee brewers offered by Bunn, a leader in the coffee equipment industry. Both models are designed to meet the demands of high-traffic settings such as cafes, restaurants, and other foodservice establishments. They combine advanced technology with user-friendly features to ensure consistent, high-quality coffee with minimal effort.

The Bunn CEZF model is known for its easy-to-use design and efficiency. One of its standout features is the "Digital Brewer" control, which allows operators to adjust brewing parameters such as brew time and water temperature. This level of customization enables baristas to consistently create the perfect cup of coffee tailored to their specific blends. Furthermore, the CEZF has a unique "intelligent" warming plate that maintains the optimal serving temperature without over-extraction, ensuring that each cup of coffee remains flavorful.

On the other hand, the Bunn CDBC incorporates a dual brewing capacity that allows for larger batches of coffee to be made simultaneously. This feature is particularly beneficial in high-demand environments where quick service is essential. The CDBC also utilizes a patented brew control technology, enabling users to select their brew strength with just a few button presses. This flexibility is complemented by its high-performance heating element, which heats water rapidly, ensuring that coffee is brewed at the ideal temperature for optimal extraction.

Both models are equipped with a large water reservoir, ensuring a continuous supply of hot water for brewing. They also feature high-quality stainless steel constructions that enhance durability and make cleaning easier. The intuitive interface on both models simplifies operation, with clear instructions that allow even novice users to brew exceptional coffee right away.

In terms of safety, both the CEZF and CDBC are designed with auto shut-off features and integrated safety protocols, minimizing the risk of overheating and ensuring a secure brewing environment.

Overall, the Bunn CEZF and CDBC are excellent choices for any commercial kitchen or café looking to serve high-quality coffee efficiently. Their advanced features, durability, and ease of use make them top contenders in the commercial brewing category.
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