FIG. 71 TRANSFORMER

SERVICE (CONT.)

Transformer - Lited Doors (JDF-2S, JDF-4S)

 

AC

A C

+

P3864

Location:

The transformer is located on the electrical com- ponent mounting bracket on the lower front of the dispenser behind the splash panel.

Test Procedure:

1.Disconnect the dispenser from the power source.

2.Disconnect the four pin plug from the main harness

from the four pin connector on the transformer.

3Check the voltage across black wire pin 1 and the white wire pin 2 on the plug from the main har- ness. Connect the dispenser to power source. The indication must be:

a)120 volts ac for two wire 120 volt models, three wire 120/208 volt and three wire 120/240 volt models.

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

c)230 volts ac for two wire 230 volt models.

4. Disconnect the dispenser from the power source.

If voltage is present as described reconnect the plug and the connector and proceed to #5.

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

5.Check the voltage between J3-5 and J3-6 on the six pin connector at the control board. Connect the dispenser to the power source. The indication must be 24 volts ac.

If voltage is present as described the transformer is operating properly.

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

Removal and Replacement:

1.Loosen the two #8-32 screws securing the com- ponent bracket to the dispenser housing base.

2.Pull component bracket out the front of the dispenser far enough so the transformer connector can be disconnected from the main wiring harness.

3Disconnect the transformer four pin connector from the four pin plug on the main wiring harness.

4.Remove the two #6-32 keps nuts securing the transformer to the component bracket.

5.Remove and discard the transformer.

6.Install new transformer on the component bracket and secure with two #6-32 keps nuts.

7.Connect the four pin connector on the transformer to four pin plug on the main wiring harness.

8.Place the component bracket into position and tighten the two #8-32 screws.

WHI/GRN - T8

WHI/BLK - T12

WHI - 120V T2, 240V T6

BLK - TI

P1647

FIG. 72 TRANSFORMER TERMINALS

49

49179

110613

 

Page 48 Page 50
Page 49
Image 49
Bunn JDF-4SB, JDF-4D manual Transformer Lited Doors JDF-2S, JDF-4S
Page 48 Page 50

JDF-4D, JDF-4SB, JDF-4S specifications

The Bunn JDF-4S is a high-performance commercial coffee brewer designed to meet the needs of busy coffee shops, restaurants, and other establishments requiring a reliable and efficient coffee brewing solution. This versatile machine boasts an array of advanced features and technologies, making it a prominent choice among professionals in the coffee industry.

One of the most notable features of the Bunn JDF-4S is its ability to brew up to 4 gallons of coffee per hour, ensuring that establishments can keep pace with high-demand environments. This capacity makes it an ideal choice for venues that experience peak periods of coffee consumption, minimizing wait times for customers. The machine is designed with a multiple-brew option, allowing users to select various brew methods, which can cater to diverse customer preferences.

The JDF-4S incorporates Bunn’s patented brewing technology, which utilizes a precision-controlled process to ensure optimal flavor extraction. The brewed coffee is delivered at an ideal temperature, typically between 195°F and 205°F, promoting maximum taste and aroma. The machine also features a programmable digital controller that enables users to set specific brew times and adjust water temperature settings to achieve consistent results.

Another significant characteristic of the Bunn JDF-4S is its durability and ease of use. Constructed with high-quality materials, the machine is built to withstand the rigors of daily operation. The user-friendly interface features a simple touchpad design for easy navigation and programming. Additionally, the machine includes a built-in diagnostics program, helping users quickly identify and troubleshoot potential issues, thereby minimizing downtime.

The JDF-4S also offers flexible brewing options, including iced coffee brewing, enhancing its versatility. It is compatible with Bunn’s extensive range of coffee and tea dispensers, allowing businesses to expand their beverage offerings effortlessly. Furthermore, the unit features an easy-access water reservoir for quick refilling and reduced wait times during busy service periods.

In terms of maintenance, the Bunn JDF-4S is designed with user convenience in mind. The machine includes a rinse and clean cycle to ensure optimal hygiene and coffee quality. Integrated clean alerts guide users through the cleaning process, promoting regular upkeep and ensuring the longevity of the brewer.

In summary, the Bunn JDF-4S represents a cutting-edge solution for coffee brewing that prioritizes performance, versatility, and ease of use. With its advanced brewing technology, user-friendly features, and robust construction, it offers an exceptional choice for businesses seeking to serve high-quality coffee efficiently.
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