Bunn TWF service manual Brew Timer HOT COFFEE- Early Models

Page 17

SERVICE (cont.)

If continuity is not present as described, refer to the

BREW TIMER (HOT COFFEE- Early Models)

Wiring Diagrams and check the wiring harness.

 

 

 

 

 

5. With a voltmeter, check the voltage across termi-

 

nals TL1 and TL4 when the TEA/OFF/COFFEE

 

switch is in the “COFFEE” position and the START

 

switch is momentarily placed in the lower posi-

 

tion. 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 mod-

 

els for approximately twenty seconds and then re-

 

turn to its previous indication.

 

 

 

6. Disconnect the brewer from the power source.

 

If voltage is present as described, the timer is operat-

 

ing properly. Adjust the timer dial as required.

 

 

If voltage is not present as described, replace the timer.

 

Removal and Replacement:

 

 

P1961.60

1. Remove all wires from the timer.

 

 

2. Remove the circuit board and dial plate from the

FIG. 6 HOT COFFEE BREW TIMER

brackets.

 

 

Location:

 

 

3. Install the new timer circuit board as described in

The hot coffee brew timer is located in the hood on

Late Model Timer section on the following pages.

the left side. It consists of a dial plate and circuit board.

4. Refer to Fig. 9 when reconnecting the wires.

 

 

 

Test Procedure:

5. Install the Timer Setting decal, provided with the

replacement timer kit, to the rear of the schematic,

1. Disconnect the brewer from the power source.

on the top cover.

 

 

2. Remove the wires from terminals TL3, TL4, & TL5

 

 

6. Adjust the timer as required. Refer to Late Model

of the timer and rotate the dial fully counterclock-

Timer section on the following pages.

 

 

wise.

 

 

 

 

 

2. With a voltmeter, check the voltage across termi-

WHI to Power Cord (120V Models)

 

 

nals TL1 and TL2 when the TEA/OFF/COFFEE

 

 

or WHI to Terminal Block (120/208V

 

switch is in the “COFFEE” position. Connect the

Models)

 

 

brewer to the power source. The indication must

WHI/RED to Hot Coffee Solenoid

 

 

be 120 volts ac for two wire 120 volt models and

 

 

WHI/RED to TEA/OFF/COFFEE Switch

 

three wire 120/208 volt models.

 

 

 

 

3. Disconnect the brewer from the power source.

 

 

 

If voltage is present as described, proceed to #4.

 

 

 

If voltage is not present as described, refer to the Wir-

 

 

 

ing Diagrams and check the wiring harness.

 

 

 

4. Check for continuity across the white/orange and

 

 

 

white/yellow wires when the START switch is held

WHI/YEL to START Switch

 

 

in the lower position.

 

 

WHI/GRN to Hot Coffee

 

 

 

 

 

If continuity is present as described, reconnect the

Solenoid

 

 

WHI/ORA to START Switch

P1962

wires to terminals TL3, TL4, & TL5 of the timer board

OLD STYLE

 

 

and proceed to #5.

FIG. 7 HOT COFFEE BREW TIMER TERMINALS

 

10510

071000

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Contents Telephone 217 529-6601 FAX 217 Post Office BOX SPRINGFIELD, IllinoisIntroduction ContentsWarranty #00656.0000 #03408.0000 #00831.0000 #02822.0000 #03409.0000 User NoticesElectrical Hook-Up Electrical RequirementsPlumbing Requirements Initial SET-UP Cleaning Adjusting Brew VolumesStart Switch TEA/OFF/COFFEE SwitchOperating Controls BrewingProblem Probable Cause Remedy TroubleshootingProblem Probable Cause Remedy TroubleshootingBrew Timer Iced Tea Dilution Iced Tea cycle will not Start SwitchBrew Solenoid Valve Iced Tea Dilution Solenoid ValveSpitting or excessive steaming Lime Build-up Level in the dispenser. 750 GPM Pointing towards brewerSerious leaks Drip-out time too long Funnel TipRemedy ProblemWeak beverage Water TemperatureFilter Type Tea or Coffee Used for proper extractionContents ServiceComponent Access Solenoid valve ServiceBrew Solenoid Valve HOT Coffee Brew Solenoid Valve Iced TEA Brew Timer HOT COFFEE- Early Models If voltage is as described, proceed to #7 Digital Brew TimerDigital Timer Wiring Service Digital Brew Timer HOT Coffee Late ModelscontIced TEA Brew Timer Terminals Service Brew Timer Iced TEA Early ModelsService Digital Brew Timer Iced TEA Late Models Service Digital Brew Timer Iced TEA Late Modelscont Control Thermostat Test Procedures Disconnect the brewer from the power sourceDilution Solenoid Valve Limit Thermostat Remove the blue wire from the limit thermostatTEA/OFF/COFFEE Switch TEA/OFF/COFFEE SwitchStart Switch Start SwitchTank Heater Tank HeaterThermal Fuse Service Thermal Fuse Models W/Faucet OnlyGRY to Iced Tea Brew Timer PNK to Iced Tea Service Half Batch Switch Optional10510 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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