Bunn H5E H5X service manual Service Solenoid Valve

Page 18

SERVICE (cont.)

Solenoid Valve

Location:

The solenoid valve is located inside the rear of the dis- penser on the right side near the bottom.

To test the solenoid valve, access will also be needed to the electronic control assembly.

Fill

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P1778

FIG. 10 SOLENOID VALVE

Test Procedure:

1.Disconnect the dispenser from the power source and turn-off the water supply to the dispenser.

2.Remove the pink wire from terminal 5 of the elec- tronic control assembly.

3.Check the voltage across the solenoid valve coil terminals with a voltmeter. Connect the dispenser to the power source. The indication must be: a.) 100 to 120 volts ac for 100 to 120 volt models or

b.) 200 to 240 volts ac for 200 to 240 volt models after a delay of approximately 5 seconds.

4.Disconnect the dispenser from the power source.

If voltage was present as described, proceed to #5.

If voltage was not present as described, refer to the Wiring Diagrams and check the dispenser wiring har- ness.

5.Remove both wires from the solenoid valve coil terminals.

6.Check for continuity across the solenoid valve coil terminals.

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

If continuity is not present as described, replace 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 after approximately 5 seconds, as the coil magnet attracts the plunger.

8.Disconnect the dispenser from the power source.

9.Reconnect the pink wire to terminal 5 of the elec- tronic control assembly.

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

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

Removal and Replacement:

1.Remove all wires from the solenoid valve coil.

2.Turn-off the water supply to the dispenser.

3.Disconnect the water lines to and from the sole- noid valve.

4.Remove the two 8-32 slotted-head screws holding the solenoid valve and mounting bracket to the component bracket.

5.Lift-out the solenoid valve.

6.Remove the two 10-32 slotted-head screws hold- ing the solenoid valve to its mounting bracket.

7.Securely install the new solenoid valve to its mount- ing bracket. The direction of flow arrow must be pointing towards the tank lid.

8.Attach the solenoid valve and mounting bracket to the component bracket.

9.Securely fasten the water lines to and from the so- lenoid valve.

10.Reconnect the wires, FIG. 11.

WHI/BLU to Electronic Control #1

WHI or RED to Terminal Block

P1779

FIG. 11 SOLENOID VALVE WIRING

18

10420 011599

 

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Contents Bunn Contents WarrantyIntroduction User Notices Electrical Requirements Plumbing RequirementsElectrical Hook-Up Initial SET-UP CleaningWall Mounted Installation Draining the DispenserTroubleshooting Problem Probable Cause RemedyTroubleshooting Problem Probable Cause Deposits. Delime as required Water boils continuously Temperature controlLime build-up Dispenser is making unusual noisesService Component AccessLiquid Level Control Flow Charts LocationGeneral This system controls the liquid level and water tem Service Electronic Controls Liquid Level Control Test ProcedureProblem Boils Excessively Fills Cup Service Electronic Controls Wiring Connections Adjustments 5A. to Increase the TemperatureService Limit Thermostat Test ProcedureLocation Limit thermostat is located on the tank lid Service Safety Overflow Switch SwitchService Solenoid Valve Solenoid ValveService Tank Heater Location Tank heater is located in the tank lidCheck for continuity across the tank heater termi- nals Wiring Diagrams Volts a CWiring Diagrams Schematic Wiring Diagram H5E Volts a C

H5E H5X specifications

The Bunn H5E and H5X coffee brewers are renowned for their high-quality brewing capabilities, designed to meet the demands of both commercial and specialty coffee environments. These brewers stand out due to their innovative features, reliable performance, and user-friendly designs, making them a preferred choice for cafes, restaurants, and other establishments.

One of the primary features of the Bunn H5E and H5X models is their high-efficiency brewing system. These machines utilize a digital brewing control that ensures precise water temperatures and accurate brew times. This technology allows baristas to achieve optimal extraction from coffee grounds, resulting in a consistent, flavorful cup of coffee every time. The machines are equipped with a stainless-steel hot water tank, allowing for rapid brewing and serving for high-volume coffee demands.

The H5E model focuses on versatility in brewing methods. It can accommodate a wide range of coffee types, from traditional drip coffee to specialty brews. With its adjustable brew basket size, users can easily switch between smaller and larger batches, making it suitable for various business sizes and needs. Additionally, the H5X variant features a high-volume design, perfect for busy environments where efficiency and speed are crucial.

Both models incorporate advanced technology such as the Cold Brew Activation feature, allowing users to make cold brew coffee efficiently. The programmable settings enable baristas to customize brewing parameters according to their specific coffee recipes, providing the ability to create unique flavor profiles that cater to customer preferences.

Durability is another significant characteristic of the Bunn H5E and H5X brewers. Built with heavy-duty materials, these machines are designed to withstand the rigorous demands of a high-traffic environment. They also feature an easy-to-clean design, ensuring that maintenance is fast and straightforward.

In summary, the Bunn H5E and H5X coffee brewers are optimized for efficiency, adaptability, and durability, making them ideal for any coffee-serving establishment. Their innovative brewing technologies and user-friendly features empower baristas to deliver exceptional coffee while minimizing downtime, ensuring that every customer enjoys a perfect cup of coffee crafted to perfection.
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