Bunn TWIN Cont, of the J3 connector. At, 2b. Temperature Probe CEZ Remove the probe from

Page 16

TROUBLESHOOTING (cont.)

 

 

 

HEATING CIRCUIT

 

 

 

PROBLEM

 

PROBABLE CAUSE

 

REMEDY

Spitting or excessive steaming

2a. Temperature Probe (CDBC)

 

A) Remove the probe from the

(cont.)

 

 

grommet and submerge in a water

 

 

 

 

bath of approximately 70°F(21°C).

 

 

 

 

Connect an ohmmeter to pins 3

 

 

 

 

and 4 of the J3 connector. At

 

 

 

 

60°F(16°C) the reading should be

 

 

 

 

15.3k ± 2k OHMS, at 70°F(21°C)

 

 

 

 

the reading should be 11.8k ± 2k

 

 

 

 

OHMS, and at 80°F(27°C) the read-

 

 

 

 

ing should be 9.3k ± 2k OHMS. If

 

 

 

 

the probe is within these param-

 

 

 

 

eters, reconnect the J3 plug to the

 

 

 

 

control board.

 

 

2b. Temperature Probe (CEZ)

 

B) Remove the probe from the

 

 

 

 

grommet and submerge in a water

 

 

 

 

bath of approximately 70°F(21°C).

 

 

 

 

Connect an ohmmeter to pins 2

 

 

 

 

and 3 of the J5 connector. At

 

 

 

 

60°F(16°C) the reading should be

 

 

 

 

15.3k ± 2k OHMS, at 70°F(21°C)

 

 

 

 

the reading should be 11.8k ± 2k

 

 

 

 

OHMS, and at 80°F(27°C) the read-

 

 

 

 

ing should be 9.3k ± 2k OHMS. If

 

 

 

 

the probe is within these param-

 

 

 

 

eters, reconnect the J5 plug to the

 

 

 

 

control board.

 

 

3. Control Board (CDBC & CEZ)

 

Set the temperature to 200°F

 

 

 

 

(95°C). Let tank temperature sta-

 

 

 

 

bilize. If temperature in tank is

 

 

 

 

above temperature setting by more

 

 

 

 

than 7°F, replace the control

 

 

 

 

board.(See pages 22 & 23)

Brewer is making unusual noises

1. Plumbing lines

 

Plumbing lines should not rest on

 

 

 

 

the counter top.

 

 

2. Water supply

 

The brewer must be connected to

 

 

 

 

a cold water supply.

 

 

3. Lime build up

 

Remove the tank lid and clean

 

 

 

 

inside of tank with a deliming agent,

 

 

 

 

if necessary.

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29319 091203

 

Page 15 Page 17
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Contents CEZ Cdbc Twin Contents IntroductionUser Notices Plumbing Requirements Electrical RequirementsElectrical Hook-Up ON/OFF Switch Brew SwitchAdditional Warmer Switches Ready IndicatorInitial SET-UP CleaningCoffee Brewing CEZ Adjustments & Optional Settings Cdbc Adjustments & Optional Settings Setting Brew TemperatureDisplaying Brew Temperature Setting Brew LockoutAdjusting Brew Volumes Pulse Brew Setup Procedure Cdbc Twin & Cdbcf Twin Troubleshooting Before troubleshooting this brewer, check for the followingTroubleshooting Refill Circuit ProblemProbable Cause RemedyProblem Probable Cause Remedy Heating Circuit Problem Probable Cause Remedy 4b. Temperature Probe CEZ Remove the probe from 3 of the J5 connector. AtIngs are taken Control board4 of the J3 connector. At 2b. Temperature Probe CEZ Remove the probe fromSet the temperature to 200F Bilize. If temperature in tank isBrewing Circuit Problem Brew cycle will not startTroubleshooting Brewing Circuit Probable Cause Remedy Move the two wires. Check for Supply and check wiringSwitch Holes are clear and unobDiagnostics Cause Things to CheckComponent Access ServiceContents Service PC Control Board Model Cdbc Disconnect the 11-pin connector from the control panelService PC Control Board Model CEZ Control Boards CEZService Switch Panel Model Cdbc Switch Panels CdbcService ON/OFF Switches Model CEZ Bottom switch terminal Service Brew Switch Start Model CEZMinals when the switch is released Service Dispense ValveLimit Thermostat Limit ThermostatsTank Heaters Tank HeaterService Tank Heaters Tank Heater WiringRefill Valve Check for continuity across the refill valve coil terminalsWarmer Elements Warmer ElementsSchematic Wiring Diagram CEZ Twin 0/6 Left Schematic Diagramwiring Twincdbc Schematic Wiring Diagram Cdbc Twin 2/2 Right
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TWIN specifications

The Bunn TWIN,ITB is a remarkable coffee brewing system designed for commercial use, aimed at establishments that require a high volume of coffee while maintaining superior quality. This innovative brewer stands out through its dual brewing capability, allowing users to brew two different types of coffee simultaneously. This feature is particularly beneficial for cafes, restaurants, and other food service locations where diverse customer preferences must be met efficiently.

One of the main features of the Bunn TWIN,ITB is its advanced brewing technology. The system utilizes Bunn's patented brewing process, ensuring optimal coffee extraction and flavor profile every time. It employs a digitally controlled brew timer and state-of-the-art heating elements, providing precise temperature control essential for achieving the ideal brew. This technology allows for consistent results, ensuring that each cup meets the high standards expected in a commercial setting.

The design of the TWIN,ITB is user-friendly and intuitive. It includes an easy-to-read LED display that simplifies programming and monitoring of the brewing process. This streamlined interface enables baristas to adjust settings quickly and efficiently, significantly reducing wait times for customers. Additionally, the unit's low-profile design enables it to fit seamlessly into various kitchen layouts and countertops, optimizing valuable space.

Durability and reliability are at the forefront of the Bunn TWIN,ITB's construction. Built with high-quality materials, the brewer is designed to withstand the rigors of intense daily use. Its stainless-steel finish not only provides a sleek and professional appearance but also makes it easy to clean and maintain, ensuring longevity and excellent performance throughout its lifespan.

Furthermore, the TWIN,ITB features an impressive water capacity with a built-in hot water tank. This allows users to brew large batches of coffee without interruption and offers instant hot water for tea, soups, or other hot beverages. The efficient brewing system utilizes pre-infusion technology, which saturates the coffee grounds before extraction, enhancing the overall flavor and aroma of the brewed coffee.

In summary, the Bunn TWIN,ITB is an exceptional choice for any commercial establishment looking to provide high-quality coffee efficiently. Its dual brewing capabilities, advanced technologies, user-friendly design, durability, and additional features make it a valuable addition to any coffee service operation. Whether busy mornings or afternoon rushes, this brewer ensures that every cup of coffee meets the high standards of taste and quality that customers expect.
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