SERVICE (cont.)

Wiring Diagrams and check the wiring harness.

BREW TIMER

OLD STYLE

 

FIG. 4 BREW TIMER

P1833

 

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 or SELECTOR

switch is in the “ON” (T3 left, T6 left or right) po-

sition. Connect the brewer to the power source.

The indication must be:

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

5.Check the voltage across terminals TL1 and TL4 with a voltmeter when the ON/OFF or SELECTOR switch is in the “ON” (T3 left, T6 left or right) po- sition and the start switch is momentarily 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 the Late Model Timer Section.

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

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

5.Adjust the timer as required. Refer to Late Model Timer Section.

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 Diagrams 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, refer to Fig. 5 and reconnect the wires to terminals TL3, TL4, & TL5 of the timer board and proceed to #5.

WHI/ORN to Start Switch WHI/GRN to Brew Solenoid WHI/YEL to Start Switch

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

PNK to Selector Switch (Half Batch Option Only)

GRY to Selector Switch (Half Batch Option Only)

If continuity is not present as described, refer to the

P1279

FIG. 5 BREW TIMER TERMINALS

Page 17

10145

072600

 

 

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Image 17
Bunn T3A, T6A service manual Brew Timer, Indication must be, If voltage is present as described, proceed to #4
Page 16 Page 18

T6, T6A, T3A specifications

The Bunn T6A, T3A, T6, and T3 are part of a distinguished line of commercial coffee brewers engineered for consistency, efficiency, and top-notch brew quality. These machines are well-suited for cafes, restaurants, and specialty coffee shops where reliability and performance are paramount.

The Bunn T6A is designed to brew large quantities, accommodating high-demand environments. With a capacity of six gallons per hour, this machine can quickly fulfill orders, ensuring that customers receive fresh, hot coffee without delay. It features a programmable touchpad that allows users to customize brew settings, enabling them to fine-tune extraction times and temperatures for various coffee blends. The T6A’s dual-float system provides precise water control, preventing overflow and enhancing safety.

The Bunn T3A is another exceptional model in this lineup, designed for both versatility and speed. It boasts a three-gallon capacity, making it ideal for medium-sized establishments. The T3A is equipped with Bunn's patented SplashGard funnel, which helps protect users from hot water splashes, providing an additional layer of safety. Its advanced brewing technology allows for an optimal brew temperature range, ensuring that coffee is extracted to perfection every time.

The Bunn T6 is similar to the T6A in its heavy-duty construction but focuses on a slightly different brewing capacity. Capable of producing back-to-back brews, the T6 can keep up with high-volume demands. This model features a digital brewer interface, making it user-friendly while providing detailed feedback on the brewing process. Its robust design allows for easy maintenance, ensuring it remains in peak operating condition.

Lastly, the Bunn T3 serves as a compact alternative in the series, suited for locations with limited space but requiring high-quality coffee. The T3 can brew up to three gallons per hour, seamlessly fitting into smaller setups without compromising on performance. Like its counterparts, it features programmable settings and quick brew times, providing flexibility and efficiency.

Together, the Bunn T6A, T3A, T6, and T3 represent a versatile range of commercial coffee brewing solutions. Each model is designed to deliver exceptional coffee, maintain consistent quality, and provide ease of use, making them integral tools for any serious coffee business. Whether high volume or limited space, Bunn caters to diverse needs while upholding the highest standards in coffee brewing technology.
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