Bunn TWF service manual Digital Brew Timer, If voltage is as described, proceed to #7

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SERVICE (cont.)

DIGITAL BREW TIMER (HOT COFFEE -Late Models)

P2198.50

FIG. 8 DIGITAL BREW TIMER

Location:

The timer is located inside the hood on the left side.

Test Procedure.

NOTE: Do not remove or install wires while timer board is installed. Pressure applied to one side may cause damage to the board.

1.Disconnect the brewer from the power source and remove the front access panel.

2.Remove the two #8-32 screws securing circuit board to the mounting bracket.

3.Remove circuit board and spacers (as required).

4.With a voltmeter, check the voltage across termi- nals TL1 and TL2 when the "TEA/OFF/COFFEE" switch is in the "COFFEE" position. Connect the brewer to the power source. The indication must be 120 volts ac for two wire 120 volt models and three wire 120/208 volt models.

5.Disconnect the brewer from the power source.

If voltage is present as described, proceed to #6.

If voltage is not present as described, refer to the Wiring Diagrams and check the brewer wiring har- ness.

6.With a voltmeter, check the voltage across termi- nals TL1 and TL4 when the "TEA/OFF/COFFEE" switch is in the "COFFEE" position. Connect the brewer to the power source. The indication must be 0 volts.

If voltage is as described, proceed to #7.

If voltage is not as described, disconnect the brewer from the power source and replace the timer.

7.With a voltmeter, check the voltage across termi- nals TL1 and TL4 when the "TEA/OFF/COFFEE" switch is in the "COFFEE" position. Connect the brewer to the power source and press the START switch. The indication must be 120 volts ac for two wire 120 volt models and three wire 120/208 volt models.

If voltage is present as described, the brew timer is operating properly. Reset the timer as required, to obtain the desired brew volume.

If voltage is not present as described, disconnect the brewer from the power source and replace the timer.

Removal and Replacement:

1.Remove the two #8-32 screws securing circuit board to the mounting bracket.

2.Remove circuit board and spacers (as required).

3.Remove all wires from the timer.

4.Attach all wires to the replacement timer board prior to installation to the component mounting bracket. Refer to FIG. 9 when reconnecting the wires.

5.Install new circuit board with spacers (as re- quired) to the component mounting bracket.

6.Adjust the timer as described below.

Timer Setting:

NOTE: Prior to setting or modifying volumes, check that the brewer is connected to water supply, the tank is properly filled, and a funnel and server are in place. NOTE: All volume settings must be done with the sprayhead installed.

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10510

071000

 

 

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Contents Post Office BOX SPRINGFIELD, Illinois Telephone 217 529-6601 FAX 217Contents WarrantyIntroduction User Notices #00656.0000 #03408.0000 #00831.0000 #02822.0000 #03409.0000Electrical Requirements Plumbing RequirementsElectrical Hook-Up Initial SET-UP Adjusting Brew Volumes CleaningOperating Controls TEA/OFF/COFFEE SwitchStart Switch BrewingTroubleshooting Problem Probable Cause RemedyTroubleshooting Problem Probable Cause RemedyBrew Solenoid Valve Iced Tea Dilution Iced Tea cycle will not Start SwitchBrew Timer Iced Tea Dilution Solenoid ValveSerious leaks Level in the dispenser. 750 GPM Pointing towards brewerSpitting or excessive steaming Lime Build-up Drip-out time too long Funnel TipProblem RemedyFilter Type Tea or Coffee Water TemperatureWeak beverage Used for proper extractionService Component AccessContents Service Brew Solenoid Valve HOT CoffeeSolenoid valve Brew Solenoid Valve Iced TEA Brew Timer HOT COFFEE- Early Models Digital Brew Timer If voltage is as described, proceed to #7Service Digital Brew Timer HOT Coffee Late Modelscont Digital Timer WiringService Brew Timer Iced TEA Early Models Iced TEA Brew Timer TerminalsService Digital Brew Timer Iced TEA Late Models Service Digital Brew Timer Iced TEA Late Modelscont Test Procedures Disconnect the brewer from the power source Control ThermostatDilution Solenoid Valve Remove the blue wire from the limit thermostat Limit ThermostatTEA/OFF/COFFEE Switch TEA/OFF/COFFEE SwitchStart Switch Start SwitchTank Heater Tank HeaterService Thermal Fuse Models W/Faucet Only Thermal FuseService Half Batch Switch Optional GRY to Iced Tea Brew Timer PNK to Iced Tea10510 081599 Ready Indicator BLU

TWF specifications

The Bunn TWF series is a versatile and high-performance coffee brewing system designed to meet the demanding needs of commercial coffee establishments. Renowned for its reliability and consistency, the Bunn TWF is engineered for high volume production while maintaining exceptional quality in every cup.

One of the main features of the Bunn TWF is its dual-voltage capability, which makes it adaptable to various electrical systems, ensuring that businesses can use it in different locations with ease. It is compatible with both 120V and 220V outlets, providing flexibility for commercial environments.

The TWF employs Bunn's innovative brewing technology, which includes a patented digital pulse brew feature. This system optimizes the extraction process by controlling the flow rate and brewing time, enhancing the flavor profile of the coffee and ensuring that each batch is rich and full-bodied. The ThermoFresh technology allows for excellent thermal retention, ensuring that the coffee remains hot and fresh for extended periods without a heated plate that can alter the taste.

Another significant characteristic of the Bunn TWF is its brewing capacity. The machine can brew up to 16.3 gallons of coffee per hour, making it an ideal choice for busy cafes, restaurants, and catering services. The large capacity also translates to less downtime, enabling staff to serve customers more efficiently.

The Bunn TWF is equipped with a user-friendly control interface, featuring intuitive buttons and an easy-to-read display. This allows for precise programming and brewing options, accommodating various coffee types and recipes. Users can easily set up their preferred brewing parameters, making it convenient to replicate the same great taste repeatedly.

Moreover, the design of the Bunn TWF emphasizes durability and ease of maintenance. Constructed from high-quality materials, it can withstand the rigors of daily use in a bustling coffee shop environment. The machine is also designed for easy cleaning, with removable components that simplify upkeep and prolong its lifespan.

In conclusion, the Bunn TWF is an exceptional choice for those in the coffee business looking to elevate their brewing game. With its outstanding features, advanced technologies, and user-focused design, it stands out as a leader in commercial coffee brewing solutions. Whether for a high-traffic café or a catering operation, the Bunn TWF is engineered to deliver quality and efficiency while satisfying the most discerning coffee connoisseurs.
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