Bunn U3A service manual Service, Wire Models and 440V Four Wire Models, Location

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SERVICE (cont.)

CIRCUIT BREAKER (120/208V and 120/240V Three

Wire Models and 440V Four Wire Models)

P2209.60

FIG. 2 CIRCUIT BREAKER

Location:

The circuit breaker is located on the right rear of the component bracket.

Test Procedures:

1.Disconnect the brewer from the power source.

2.Disconnect the black wire from the main harness from the circuit breaker and the white wire on the pump assembly. With a voltmeter, check the voltage across the black wire and the white wire. Connect the brewer to the power source. The indication must be:

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

b)208 or 240 volts ac for four wire 440 volt mod- els.

3.Disconnect the brewer from the power source.

If voltage is present as described, reconnect the white wire to the pump assembly and proceed to #4. If volt- age is not present as described, refer to the Wiring Diagrams and check the brewer wiring harness.

4.With the black wire removed, remove the other black wire from the circuit breaker.

5.Check for continuity across the terminals on the circuit breaker.

If continuity is present as described the circuit breaker is operating properly.

If continuity is not present as described, press the reset button and repeat step 5, if continuity is not present as described, replace the circuit breaker.

Removal and Replacement:

1.Remove wires from the circuit breaker.

2.Remove the nut securing the circuit breaker to the component bracket.

3.Remove circuit breaker and discard.

4.Install new circuit breaker on component bracket and secure with nut.

5.Refer to Fig. 3 and reconnect the wires.

BLK from Main

Harness

BLK from ON/

OFF Switch

FIG. 3 CIRCUIT BREAKER TERMINALS P1723

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10060

080900

 

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Contents U3A Phone 217 529-6601 FAX 217BUNN-O-MATIC Commercial Product Warranty Introduction User NoticesElectrical Installation Instructions Electrical RequirementsPlumbing Requirements Initial SetupCE Requirements Initial Setup Adjusting Brew VolumesFilter Holder CleaningCoffee Brewing Brew cycle will not start No water TroubleshootingProblem Probable Cause BrewerTroubleshooting Problem RemedyRefer to Service Circuit Breaker for testing procedures. See Use Bunn filters made for the U3 brewer Remove obstructionRemove and clean lime off the tank heater. See Contents ServiceComponent Access Location ServiceWire Models and 440V Four Wire Models Contactor ContactorService Contactor Control Thermostat Fuse and Fuse Hilder Limit Thermostat Limit thermostatModel Voltage Reconnect the blue wire to T1 on the liquid level boardLiquid Level Board and Level Probe Jumper Not TouchingLiquid Level Board Terminals BLK from Main Harness RED to Main Harness ON/OFF SwitchTest Procedures Disconnect the brewer from the power source Pump Assembly Pump AssemblyRelay Brewers W/BREW Lockout If voltage is present as described, proceed to #3Brew Timer Removal and Replacement Disconnect the wires from the relayRefer to and reconnect the wires BLU from Start Switch BLU to Start Switch BLU from Brew TimerSelector Switch Half Batch Option Selector Switch Half BATCHP1317.30Solenoid SolenoidEarly Models Start Switch Brew Start Switch BrewTank Heaters Tank HeaterTimer Early Models Thermal Fuses 230V-CE Models onlyIf voltage is present as described, proceed to #8 Service Timer Early ModelscontDisconnect the black and white wires to the pump Harness BLK to Pump Lead WHI to Pump LeadIf voltage is as described, proceed to #7 Service Digital Timer Late ModelsAdjust the timer as described below Timer Setting Digital Timer Terminals Transformer Remove the transformer and discardService Master ON/OFF Switch Late Models Master ON/OFF Switch LOC120/208 Volts AC 120/240 Volts AC 3 Wire + GND Single Phase 10060 080900 10060 080900 Schematic Wiring Diagram U3A CE Schematic Wiring Diagram U3833 Schematic Wiring Digram U3833

U3A, U3 specifications

Bunn U3A, also known as Bunn's U3A, is a unique and innovative approach to education that caters specifically to retirees and senior citizens. The primary aim of this initiative is to foster lifelong learning and social engagement among older adults, empowering them to explore various subjects of interest and connect with like-minded individuals.

One of the main features of Bunn U3A is its diverse range of courses and activities. From art and music appreciation to digital literacy and gardening, participants can choose from a variety of subjects that pique their interest. This broad curriculum is designed to cater to varied backgrounds and skill levels, ensuring that everyone finds something that resonates with them. The courses are typically led by volunteer tutors, many of whom are retired professionals passionate about sharing their knowledge and experiences.

Another characteristic of Bunn U3A is its strong emphasis on community and socialization. By providing a supportive and welcoming environment, members are encouraged to interact, collaborate, and form friendships. The organization often hosts events, workshops, and excursions, further enhancing the sense of belonging and camaraderie among participants. This communal aspect is crucial for combating feelings of isolation that can sometimes accompany retirement.

Bunn U3A leverages technology to enhance the learning experience. Many courses integrate digital tools and online platforms, enabling participants to access resources and engage in discussions beyond the classroom. This tech-savvy approach ensures that members are equipped with essential skills that are increasingly relevant in today’s digital world. As a result, participants often find themselves not only enriching their knowledge but also enhancing their technological proficiency.

In addition to its educational offerings and community focus, Bunn U3A promotes a culture of inclusivity. Everyone, regardless of previous academic background, is welcomed to join, emphasizing that learning is a lifelong journey. The philosophy that underpins Bunn U3A is one of empowerment, with a commitment to ensuring that older adults continue to thrive intellectually, socially, and emotionally.

In summary, Bunn U3A stands out as a vibrant learning community that prioritizes the educational and social needs of retirees. With its diverse courses, strong community bonds, and integration of technology, it serves as a model for how organizations can successfully promote lifelong learning and engagement among older individuals, enriching their lives in meaningful ways.
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