Bunn T3A, T6A manual Service, Brew Solenoid Valve

Page 15

SERVICE (cont.)

BREW SOLENOID VALVE

P1833.50

FIG. 2 BREW SOLENOID VALVE

Location:

Viewing the brewer from the rear the brew sole- noid valve is mounted on the left side of the mounting bracket.

Test Procedures:

1.Disconnect the brewer from the power source.

2.Disconnect the white/violet and white/green wires from the solenoid valve. With the ON/OFF or SE- LECTOR switch in the "ON" (T3 left, T6 Left or right) position and press the start switch.

3.With a voltmeter, check the voltage across the white/violet and white/green wires. 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.

4.Disconnect the brewer from the power source,

If voltage is present as described, proceed to #5.

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

5.Check for continuity across the solenoid valve coil terminals.

If continuity is present as described, reconnect the white/violet from the switch and white/green wire from the brew timer.

If continuity is not present as described, replace the solenoid valve.

6.Check the solenoid valve for coil action. Connect the brewer to the power source. With ON/OFF or SELECTOR switch in the "ON" (T3 left, T6 left or right) position press start switch and listen care- fully in the vicinity of the solenoid valve for a "click- ing" sound as the coil magnet attracts.

7.Disconnect the brewer from the power source.

If the sound is heard as described and water will not pass through the solenoid valve, there may be a block- age in the water line before the solenoid valve or, the solenoid valve may require inspection for wear, and removal of waterborne particles.

If the sound is not heard as described, replace the solenoid valve.

Removal and Replacement:

1.Remove all wires from solenoid valves.

2.Turn off the water supply to the brewer.

3.Disconnect the water lines to and from the sole- noid valves.

4.Remove the two #8-32 keps nuts holding the mounting bracket to the brewer base.

5.Lift out the bracket.

6.Remove the two #10-32 slotted-head screws hold- ing the solenoid valve to the mounting bracket.

7.Securely install the new solenoid valve to the mounting bracket.

8.Attach the mounting bracket to the brewer base.

9.Securely fasten the water lines to and from the solenoid valves.

10.Refer to the Fig. 3 when reconnecting the wires.

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072600

 

 

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Contents Telephone 217 529-6601 FAX 217 Post Office BOX SPRINGFIELD, IllinoisIntroduction Warranty#00831.0000 #00656.0000 #03408.0000 #03409.0000 User NoticesElectrical Requirements Plumbing RequirementsElectrical Hook-Up Initial SET-UP Fill & Heat Initial Timer AdjustmentAdjusting Brew Volumes ON/OFF Switch T3 onlyOperating Controls TEA Brewing CleaningSelector Switch T6 only Start SwitchTroubleshooting Problem Probable Cause Brew cycle will not startRemedy Troubleshooting ProblemProbable Cause Remedy Dilution cycle will not start Dilution Solenoid Valve Problem Probable Cause RemedySpitting or excessive steaming Control Thermostat Drip-out time too longDripping from sprayhead Beverage overflows dispenser Weak beverage Dry tea leaves remain in the funnel Brewer is making unusal noisesPlumbing Lines Water Supply Tank Heater Service Component AccessContents Brew Solenoid Valve ServiceSolenoid Valve Terminals Service Brew Solenoid ValveIf continuity is not present as described, refer to Brew TimerIndication must be If voltage is present as described, proceed to #4If voltage is as described, proceed to #7 Service Digital Brew Timer Late ModelsDigital Timer Wiring Service Digital Brew Timer Late ModelscontControl Thermostat Dilution Solenoid Valves Test Procedure Disconnect the brewer from the power sourceDilution Timer ClockwiseSource. The indication must be With a voltmeter, check the voltage across Limit ThermostatON/OFF or Selector Switch WHI/VIO On left or right positionStart Switch Tank Heater 10145 072600 10145 072600 10145 072600
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T3, 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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