Bunn TWF service manual Service, Component Access, Contents

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SERVICE

This section provides procedures for testing and replacing various major components used in this brewer should service become necessary. Refer to Troubleshooting for assistance in determining the cause of any problem.

WARNING - Inspection, testing, and repair of electri- cal equipment should be performed only by qualified service personnel. The brewer should be disconnected from the power source when servicing, except when electrical tests are required and the test procedure spe- cifically states to plug-in the brewer.

COMPONENT ACCESS

WARNING - Disconnect the brewer from the power source before the removal of any panel or the replace- ment of any component.

All components are accessible by the removal of the top cover and rear inspection panel.

The top cover is attached with four #6-32 screws. Removal of the top cover will allow access to TEA/OFF/ COFFEE switch, start switch, brew timers, control thermostat, limit thermostat, thermal fuse and tank heater.

The rear inspection panel is attached with six #8- 32 screws. Remove of the rear panel will allow access to the brew solenoid valves and the dilution solenoid valve .195 GPM flow control and check valve.

Contents

P1959.60

FIG. 1 COMPONENT ACCESS

Brew Solenoid Valve (Hot Coffee)

15

 

 

Brew Solenoid Valve (Iced Tea)

16

 

 

Brew Timer (Hot Coffee- Early Models)

17

 

 

Digital Brew Timer (Hot Coffee-Late Models)

18

 

 

Brew Timer (Iced Tea - Early Models)

20

 

 

Digital Brew Timer (Iced Tea-Late Models)

21

 

 

Control Thermostat

23

 

 

Dilution Solenoid Valve

24

 

 

Limit Thermostat

25

 

 

TEA/OFF/COFFEE Switch

26

 

 

Start Switch

27

 

 

Tank Heater

28

 

 

Thermal Fuse

29

 

 

Half Batch Switch (Optional)

30

 

 

Wiring Diagrams

31

 

 

 

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10510

071000

 

 

 

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Contents Post Office BOX SPRINGFIELD, Illinois Telephone 217 529-6601 FAX 217Introduction ContentsWarranty User Notices #00656.0000 #03408.0000 #00831.0000 #02822.0000 #03409.0000Electrical Hook-Up Electrical RequirementsPlumbing Requirements 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 extractionContents ServiceComponent Access Solenoid valve ServiceBrew Solenoid Valve HOT Coffee 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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