Bunn U3A Relay Brewers W/BREW Lockout, If voltage is present as described, proceed to #3

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SERVICE (cont.)

RELAY (BREWERS W/BREW LOCKOUT)

FIG.18 RELAY

P1731.55

 

Location:

 

The relay is located on the front part of the com- ponent bracket, mounted on the top of the timer bracket.

Test Procedures:

All Models Except 230V - CE Models

1.Disconnect the brewer from the power source.

2.Disconnect the wires from relay terminals "A" & "B". Check for continuity between terminals "A" & "B".

If continuity is present as described, reconnect the wires to terminals "A" & "B" and proceed to #3.

If continuity is not present as described replace the relay.

3.Disconnect the wires from relay terminals 2 & 7.

4.Check for continuity across terminals 2 & 7.

If continuity is present as described, reconnect the wires to terminals 2 & 7 and proceed to # 5.

If continuity is not present as described, replace the relay.

5.Disconnect the wires from relay terminals 5 & 7.

6.Check for continuity across terminals 5 & 7 by manually closing relay contact. Continuity must not be present when contact is released.

If continuity is present as described, reconnect the wires, the relay is operating properly.

If continuity is not present as described, replace the relay.

230V - CE Models

1.Disconnect the brewer from the power source.

2.Disconnect the black wire from relay terminal "A" and the red wire from relay terminal "B". Check the voltage across the black and red wire with a voltmeter. Connect the brewer to the power source. The indication must be 230 volts ac.

If voltage is present as described, proceed to #3.

If voltage is not present as described, refer to the Wir- ing Diagrams and check the brewer wiring harness.

3.Disconnect the brewer from the power source.

4.Check for continuity across relay terminals "A" & "B"

If continuity is present as described, reconnect the wires to terminals "A" & "B" and proceed to #5.

If continuity is not present as described, replace the relay.

5.With the thermostat in the "ON" position and the relay engaged disconnect the brewer from the power source.

6.Disconnect the blue wires from relay terminals 1 and 7. Check for continuity across terminals 1 and 7.

If continuity is present as described, proceed to #7 If continuity is not present as described, replace the relay.

7.Turn the thermostat to the "OFF" position, con- nect the brewer to the power source and turn the thermostat back to the "ON" position. Continuity should not be present across terminals 1 & 7.

If continuity is not present as described, the relay is operating properly.

If continuity is present as described, replace the relay.

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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 RequirementsInitial Setup CE RequirementsPlumbing Requirements Initial Setup Adjusting Brew VolumesCleaning Coffee BrewingFilter Holder Troubleshooting Problem Probable CauseBrew cycle will not start No water 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 Service Component AccessContents Service Wire Models and 440V Four Wire ModelsLocation Contactor ContactorService Contactor Control Thermostat Fuse and Fuse Hilder Limit Thermostat Limit thermostatReconnect the blue wire to T1 on the liquid level board Liquid Level Board and Level ProbeModel Voltage Jumper Not TouchingLiquid Level Board Terminals ON/OFF Switch Test Procedures Disconnect the brewer from the power sourceBLK from Main Harness RED to Main Harness Pump Assembly Pump AssemblyRelay Brewers W/BREW Lockout If voltage is present as described, proceed to #3Removal and Replacement Disconnect the wires from the relay Refer to and reconnect the wires BLU from Start SwitchBrew Timer 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 onlyService Timer Early Modelscont Disconnect the black and white wires to the pumpIf voltage is present as described, proceed to #8 Harness BLK to Pump Lead WHI to Pump LeadService Digital Timer Late Models Adjust the timer as described below Timer SettingIf voltage is as described, proceed to #7 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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