Bunn SRUA service manual Solenoid

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SERVICE (cont.)

SOLENOID

 

FIG. 18 SOLENOID

P2180

 

Location:

 

The solenoid is mounted on the upper left rear of the component bracket.

Test Procedures:

1.Drain 1/2 gallon of water from the faucet in order to activate the probe.

2.Disconnect the brewer from the power source.

3.Place the ON/OFF switch in the ON position.

4.Disconnect the blue wire from the liquid level board T1 and the black wire from the main harness to the solenoid. With a voltmeter, check the volt- age across the blue wire and the black wire. Connect the brewer to the power source. After an approximate 5 second delay, the indication must be 230 volts ac.

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 brewer wiring diagram and check the wiring harness.

6. Check for continuity across the solenoid valve coil

7.Check the solenoid valve for coil action. Connect the dispenser to the power source. Listen carefully in the vicinity of the solenoid valve for a "clicking" sound as the coil magnet attracts.

If the sound is heard as described and water will not pass through the solenoid valve, there may be a blockage in the water line before the solenoid valve or, the solenoid valve may require inspection for wear, and removal of waterborne particles.

If the sound is not heard as described, replace the solenoid valve.

Removal and Replacement:

1.Remove all wires from the solenoid valve.

2.Turn off the water supply to the brewer.

3.Disconnect the water inlet line from the connector on the solenoid valve.

4.Remove solenoid, connectors, and tank inlet tube as an assembly.

5.Remove the tank inlet tube grommet and discard.

6.Install new tank inlet tube grommet.

7.Install new solenoid assembly.

8.Install water inlet tube to connector on the sole- noid.

9.Turn on the water supply to the brewer.

10.Refer to Fig. 19 and reconnect the wires.

BLU from Liquid

Level Board T1

BLK from Main

Harness

GRN from Main

Harness

terminals.

If continuity is present as described, reconnect the wires to the solenoid.

If continuity is not present as described, replace the solenoid valve.

FIG. 19 SOLENOID TERMINALS

P1741.30

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10067.3 070102

 

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Contents Post Office BOX SPRINGFIELD, Illinois Bunn SruaIntroduction BUNN-O-MATIC Commercial Product WarrantyUser Notices Plumbing Requirements Electrical Installation InstructionsElectrical Requirements Plumbing Hook-up Initial SetupAdjusting Brew Volumes Filter Holder CleaningCoffee Brewing Remedy TroubleshootingProblem Probable Cause Direction of flow arrow must be pointing towards brewer ProblemBrew cycle will not start Tank not filling Problem Probable Cause Remedy Structed Refer to Service Solenoid Valve for testing procedures. SeePump tubing Funnel overflows FiltersCoffee reservoir overflows Brewer is making unusal noises Remove and clean lime off the tank heater. SeeComponent Access ServiceThermostat ContactorLocation BLK Thermal Block L1 Fuse to Tank Heater RED Thermal FuseControl Thermostat Disconnect the red wires from the control thermo- statFuse and Fuse Holder Fuse and Fuse HolderLimit Thermostat Limit ThermostatLiquid Level Board Liquid Level Board and Level ProbeService Liquid Level Board and Level Probe RED to Start Switch, Brew ON/OFF SwitchDisconnect all wires on the ON/OFF switch Pump Assembly Pump AssemblySelector Switch Half Batch Selector Switch Half Batch OptionSolenoid SolenoidLocation Start Switch BrewSwing ARM Switch Swing ARM SwitchTank Heater Tank HeaterThermal Fuses Thermal FusesTimer If voltage is as described, proceed to #7 Service Digital Brew Timer Late ModelsDigital Timer Terminals 10491.0004A 07/02 2002 BUNN-O-MATIC Corporation

SRUA specifications

The Bunn SRUA is an innovative coffee brewer that is designed to meet the needs of commercial environments, like restaurants, cafes, and office breakrooms. This machine is known for its efficiency, reliability, and exceptional brewing quality. The SRUA model is particularly popular for its ability to produce consistently great-tasting coffee with minimal effort.

One of the standout features of the Bunn SRUA is its unique brewing technology. The machine is equipped with a patented brewing system that allows for precise control over temperature and brewing time. This ensures that the coffee is brewed at the optimal temperature, extracting the maximum flavor from the coffee grounds. The SRUA also features a hot water faucet that provides instant hot water for tea or other beverages, enhancing versatility in beverage options.

The Bunn SRUA has a large capacity, able to brew multiple pots of coffee quickly. It can produce up to 3.8 gallons of coffee per hour, making it ideal for high-demand settings. The brewer has a built-in water tank that maintains the right temperature at all times, reducing wait times and allowing for quick service during busy hours.

In terms of design, the SRUA is built to withstand the rigors of daily use in commercial settings. It features high-quality stainless steel construction, ensuring durability and longevity. Additionally, the machine is relatively compact, allowing it to fit on countertops with limited space while still providing high-volume output. The user-friendly interface and clear indicator lights make operating the machine straightforward, even for staff with minimal training.

Moreover, the Bunn SRUA emphasizes easy maintenance. The machine comes with a removable brew basket and a stainless steel funnel that simplify cleaning and prevent residue buildup. Regular maintenance is streamlined, helping to keep the brewer functioning at peak performance.

Security features are also integrated into the Bunn SRUA, with options for water line connection and manual fill capabilities, allowing users to choose the most convenient setup for their needs.

In summary, the Bunn SRUA is a powerful, efficient, and durable commercial coffee brewing solution that delivers exceptional performance and versatility, making it an excellent choice for businesses that prioritize quality and service.
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