SERVICE (cont.)

DIGITAL TIMER (ELECTRO/MECHANICAL ONLY) (LATE MODELS)

 

 

 

2TL

L1

 

4L

3

T

5TL

TL

 

 

T

 

 

 

 

 

 

 

NEW STYLE

 

 

 

 

P2231.35

FIG. 31 DIGITAL TIMER

Location:

The timer is located inside the front of the trunk on the top of the component bracket.

Test Procedure.

NOTE: Do not remove or install wires while timer board is installed. Pressure applied to one side may cause damage to the board.

1.Disconnect the brewer from the power source and remove the front access panel.

2.Remove the two #8-32 screws securing circuit board to the mounting bracket.

3.Remove circuit board and spacers (as required).

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

a)120 volts ac for three wire 120/208 or 120/240 volt models.

b)200 to 240 volts ac on two wire 200 or 240 volt models.

5.Disconnect the brewer from the power source.

If voltage is present as described, proceed to #6.

If voltage is not present as described, refer to the Wiring Diagrams and check the brewer wiring har- ness.

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

nals TL1 and TL4 when the "ON/OFF" switch is in the "ON" (upper) position. Connect the brewer to the power source. The indication must be 0 volts.

If voltage is as described, proceed to #7.

If voltage is not as described, disconnect the brewer from the power source and replace the timer.

7.With a voltmeter, check the voltage across termi- nals TL1 and TL4 when the "ON/OFF" switch is in the "ON" (upper) position. Select the 2 gallon batch setting. Connect the brewer to the power source and press the "START" switch. The indication must be as follows:

a)120 volts ac for three wire 120/208 or 120/240 volt models for approximately 1 minute 20 sec- onds for a 2 gallon batch.

b)200 to 240 volts ac on two wire 200 volt or 240 volt models for approximately 1 minute 20 sec- onds for a 2 gallon batch.

8.Select the 1-1/2 gallon batch setting and repeat #7. The voltage indication should remain for approxi- mately 1 minute.

9.Select the 1 gallon batch setting and repeat #7. The voltage indication should remain for approximately 40 seconds.

If voltage is present as described, the brew timer is operating properly. Reset the timer as required, to obtain the desired brew volume.

If voltage is not present as described, disconnect the brewer from the power source and replace the timer.

Removal and Replacement:

1.Remove the two #8-32 screws securing circuit board to the mounting bracket.

2.Remove circuit board and spacers (as required).

3.Remove all wires from the timer.

4.Attach all wires to the replacement timer board prior to installation to the component mounting bracket. Refer to FIG. 32 when reconnecting the wires.

5.Install new circuit board with spacers (as re- quired) to the component mounting bracket.

6.Adjust the timer as described below.

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Bunn System III manual Digital Timer ELECTRO/MECHANICAL only Late Models, If voltage is as described, proceed to #7
Page 34 Page 36

System III specifications

The Bunn System III is a versatile and efficient commercial brewing system designed for high-demand environments such as cafés, restaurants, and catering operations. Renowned for its reliability and performance, the System III combines advanced brewing technology with user-friendly features to deliver exceptional coffee consistently.

One of the key features of the Bunn System III is its innovative brewing technology, which employs a unique infuser system. This design allows for optimal extraction of coffee flavors by ensuring that hot water is evenly distributed over the coffee grounds, maximizing flavor and ensuring a rich, balanced cup every time. The brewing system can brew up to 3.8 gallons of coffee per hour, making it an ideal choice for busy establishments.

The System III is equipped with an impressive built-in water heater that maintains a temperature of approximately 200°F, which is crucial for brewing coffee at the ideal temperature. This consistent temperature control minimizes the risk of under-extraction or over-extraction, resulting in better-tasting coffee. Additionally, the hot water faucet feature allows users to brew tea or instant beverages on demand, further enhancing the system's versatility.

Another characteristic that sets the Bunn System III apart is its user-friendly interface. The system is designed with intuitive controls, allowing baristas and kitchen staff to operate it with minimal training. The easy-to-read digital display provides critical information such as brew time and water temperature, ensuring that users can monitor the brewing process closely.

Durability is a hallmark of the Bunn System III. Constructed from high-quality materials, this brewing system is designed to withstand the rigors of commercial use. Its robust design ensures longevity and minimizes the need for frequent maintenance, making it a cost-effective choice for businesses.

The Bunn System III also features a large-capacity brew basket, capable of holding ample coffee grounds for high-volume brewing. This basket, combined with the system's efficient design, allows for quick and easy brewing, making it perfect for high traffic situations.

In conclusion, the Bunn System III coffee brewing system is a top choice for commercial coffee operations. Its advanced brewing technology, consistent temperature control, user-friendly features, and durable construction combine to create an exceptional brewing experience. Whether in a café, restaurant, or catering service, the Bunn System III stands out as an indispensable tool for delivering high-quality coffee efficiently.
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