SERVICE (cont.)

BREW TIMER (Early Models)

FIG. 4 BREW TIMER

P1276.40

 

Location:

The brew timer is located in the hood. It consists of the left dial plate and circuit board.

Test Procedure:

1.Disconnect the brewer from the power source.

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

of the timer and rotate the dial fully counterclock- wise.

2.With a voltmeter, check the voltage across termi- nals TL1 and TL2 when the ON/OFF switch is in the ÒONÓ position. Connect the brewer to the power source. The indication must be:

a)120 volts ac for two wire 120 volt models.

b)240 volts ac for two wire 240 volt models.

c)100 volts ac for two wire 100 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 Diagram and check the wiring harness.

4.Check for continuity across the white/orange and white/yellow wires when the start switch is held in the lower position.

If continuity is present as described, reconnect the wires to terminals TL3, TL4, & TL5 of the timer board and proceed to #5.

If continuity is not present as described, refer to the Wiring Diagrams and check the wiring harness.

5.With a voltmeter, check the voltage across termi- nals TL1 and TL4 when the ON/OFF switch is in the ÒONÓ position and the start switch is momen- tarily placed in the lower position. Connect the brewer to the power source. The indication must be:

a)120 volts ac for two wire 120 volt models for approximately twenty seconds and then return to its previous indication.

b)240 volts ac for two wire 240 volt models for approximately twenty seconds and then return to is previous indication.

c)100 volts ac for two wire 100 volt models for approximately twenty seconds and then return 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:

1.Remove all wires from the timer.

2.Remove the circuit board and dial plate from the brackets.

3.Install the new timer circuit board as described in Late Model Timer Section on the following pages.

4.Refer to Fig. 7 when reconnecting the wires.

5.Install the Timer Setting decal, provided with the replacement timer kit, to the rear of the schematic, on the bottom of the top cover.

5.Adjust the timer as required. Refer to Late Model Timer section on the following pages.

 

WHI to Power Cord (100V & 120V)

 

or RED to Power Connector (240V)

 

WHI to Dilution Timer (100V & 120V)

 

or RED to Dilution Timer (240V)

 

WHI/VIO to Dilution Timer

 

WHI/VIO to ON/OFF Switch

WHI/ORN to Start Switch

 

WHI/GRN to Brew Solenoid

 

WHI/YEL to Start Switch

PNK to Selector Switch

 

 

(Half Batch Option

 

Only)

OLD STYLE

GRY to Selector Switch

(Half Batch Option

Only)

 

 

P1279

FIG. 5 BREW TIMER TERMINALS

 

 

 

Page 17

10225

071500

 

 

Page 16 Page 18
Page 17
Image 17
Bunn TU3 service manual Service Brew Timer Early Models
Page 16 Page 18

TU3 specifications

The Bunn TU3 is a renowned commercial coffee brewer known for its reliability and performance in bustling coffee shops, restaurants, and diners. Designed to cater to high-demand environments, the TU3 stands out with a variety of features that ensure an optimal brewing experience.

One of the primary characteristics of the Bunn TU3 is its capability to brew large volumes of coffee efficiently. It has a 3-gallon capacity, making it ideal for establishments that serve numerous customers throughout the day. This model can produce up to 19 gallons of coffee per hour, allowing establishments to keep pace with customer demand without sacrificing quality or flavor.

At the heart of the Bunn TU3's performance are its advanced brewing technologies. The brewer features a patented "multi-stream" spray head that evenly distributes hot water over coffee grounds, ensuring optimal extraction for a richer taste. This technology contributes to the consistent flavor profile that customers expect in a quality cup of coffee.

The TU3 is also equipped with a built-in hot water faucet, providing added convenience for brewing tea or instant beverages. Operators can easily access boiling water without interfering with the brewing process, streamlining service during peak hours. The adjustable temperature settings further enhance control over the brewing process, allowing for customization based on the coffee type or personal preference.

In terms of construction, the Bunn TU3 is built to withstand the rigors of commercial use. The brewer boasts a durable stainless steel body that is not only stylish but also easy to clean, helping maintain a professional appearance in any setting. Additionally, the brewer's design incorporates features such as a splash guard and easy-to-use controls, making it user-friendly for staff members.

Energy efficiency is another highlight of the Bunn TU3. Its innovative design helps in reducing energy consumption while still providing rapid brewing capabilities. This feature is particularly appealing to environmentally conscious operators looking to minimize their operational impact.

Overall, the Bunn TU3 coffee brewer combines speed, reliability, and exceptional brewing technology, making it a top choice for businesses that prioritize quality coffee service. Its combination of durability, efficiency, and user-friendly features ensures that it can handle the demands of any high-volume coffee operation, delivering excellent results cup after cup.
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