Bunn U3A service manual Coffee Brewing, Cleaning, Filter Holder

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COFFEE BREWING

1.Brewing cycles may be started whenever water temperature is correct. This condition is indicated by the dial thermometer on front of the brewer. Whenever the pointer is in the green, brewer is ready for brewing.

2.Insert Bunn® filter in funnel and add desired amount of coffee.

3.Level the bed of coffee and place funnel into the funnel support. Place funnel cover over the funnel and be sure the water swing spout is over the center of the funnel cover.

4.Turn "ON/OFF" switch to the "ON" position.

5.Push and release "START" switch to start the brew cycle.

6.Water swing spout should not be moved as long as water is flowing into the funnel cover. When water stops flowing, it may then be moved for access to brewing funnel.

7.Remove funnel cover. Funnel should not be removed from brewer until drip out of coffee has been com- pleted.

8.To empty funnel, invert it over a waste container to dispose of filter and grounds. An additional flange is provided on the funnel to help make this step easier.

NOTE: Hot water may be drawn from the hot water faucet during a brew cycle. However, if a large amount of hot water is drawn off (over 1 gallon) operator should wait to do so between brewing cycles.

CLEANING

NOTE: Tanks and tank components should be delimed regularly based on local water conditions. Excessive mineral build-up on stainless steel surfaces can initiate corrosion reactions resulting in serious leaks.

1.Remove both funnels, funnel lids and supports, under hot water, rinse away all coffee oils. Wipe with a clean damp cloth.

2.Drain both coffee reservoirs by opening coffee faucets. When empty, close faucets.

3.Cycle two or three inches of water into each coffee reservoir and scrub entire reservoir area.

NOTE: The brewer must NOT be rinsed or cleaned by a water jet device.

4.Drain both coffee reservoirs and rinse. Use clean damp cloth to wipe both reservoirs.

5.Install both coffee funnel supports, funnels and funnel lids.

6.Remove the sight gauge cap, insert sight gauge cleaning brush into the sight gauge glass tube and clean.

7.To clean coffee faucets, remove the faucet handle from the faucet and faucet clean out cap. Clean faucet with a faucet cleaning brush and wipe all parts with a damp cloth. Replace faucet seat cups periodically if badly stained or to stop faucet dripping. DO NOT CLEAN THE HOT WATER FAUCET.

8 Reassemble the coffee faucets.

9.Wipe the entire outside surface of the machine with a clean damp cloth. Wipe dry.

FILTER HOLDER

1.A filter holder is supplied with each U3 coffee brewer. Its purpose is to keep the filters in their originally formed shape to properly fit the brewer funnel.

2.It is suggested that only one cluster of filters be placed in the holder at one time for best results.

3.Not using the filter holder may permit the filters to gradually widen out towards a flat shape, especially so if humidity is present. Once a filter has lost its upright side walls, it may tend to collapse inward when placed in the brewing funnel. If this happens the hot water spray may cause one side to fall inwards, letting coffee grounds flow over the edge of filter and into the brewed coffee. Proper use of the holder should prevent this problem.

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Contents Phone 217 529-6601 FAX 217 U3ABUNN-O-MATIC Commercial Product Warranty User Notices IntroductionElectrical Requirements Electrical Installation InstructionsCE Requirements Initial SetupPlumbing Requirements Adjusting Brew Volumes Initial SetupCoffee Brewing CleaningFilter Holder Brewer TroubleshootingProblem Probable Cause Brew cycle will not start No waterTroubleshooting Remedy ProblemUse Bunn filters made for the U3 brewer Remove obstruction Refer to Service Circuit Breaker for testing procedures. SeeRemove and clean lime off the tank heater. See Component Access ServiceContents Wire Models and 440V Four Wire Models ServiceLocation Contactor ContactorService Contactor Control Thermostat Fuse and Fuse Hilder Limit thermostat Limit ThermostatJumper Not Touching Reconnect the blue wire to T1 on the liquid level boardLiquid Level Board and Level Probe Model VoltageLiquid Level Board Terminals Test Procedures Disconnect the brewer from the power source ON/OFF SwitchBLK from Main Harness RED to Main Harness Pump Assembly Pump AssemblyIf voltage is present as described, proceed to #3 Relay Brewers W/BREW LockoutBLU to Start Switch BLU from Brew Timer Removal and Replacement Disconnect the wires from the relayRefer to and reconnect the wires BLU from Start Switch Brew TimerSelector Switch Half BATCHP1317.30 Selector Switch Half Batch OptionSolenoid SolenoidEarly Models Start Switch Brew Start Switch BrewTank Heater Tank HeatersThermal Fuses 230V-CE Models only Timer Early ModelsHarness BLK to Pump Lead WHI to Pump Lead Service Timer Early ModelscontDisconnect the black and white wires to the pump If voltage is present as described, proceed to #8Adjust the timer as described below Timer Setting Service Digital Timer Late ModelsIf voltage is as described, proceed to #7 Digital Timer Terminals Remove the transformer and discard TransformerMaster ON/OFF Switch LOC Service Master ON/OFF Switch Late Models120/208 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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