Bunn HC-2 HC-3 Hopper Delay Board, Reconnect the eight pin connector to the hopper delay board

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SERVICE (cont.)

HOPPER DELAY BOARD

P1199.45

FIG. 13 HOPPER DELAY BOARD

Location

The hopper delay board is located on the left front side of the dispenser base just behind the front panel.

Test Procedures:

1.Disconnect the dispenser from the power source.

2.Disconnect the white and black wires of the hopper delay board harness from the main wiring har- ness.

3.Check the voltage across the white and black wires of the main wiring harness with a voltmeter. Con- nect the dispenser to the power source. The indi- cation must be:

a)120 volts ac for two wire 120 volt models.

b)120 volts ac for three wire 120/208 volt or 120/ 240 volt models.

c)240 volts ac for two wire 240 volt models.

4.Disconnect the dispenser from the power source.

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

If voltage is not present as described, refer to the wir- ing diagram and check the dispenser wiring harness.

5.Reconnect the white and black wires of the hop- per delay board harness to the main harness.

6.Check the voltage across the terminals on the auger motor with a voltmeter. Press and hold the appropriate dispense switch. Connect the dis- penser to the power source. After a delay of .7 seconds the indication must be:

a)120 volts ac for two wire 120 volt models.

b)120 volts ac for three wire 120/208 volt or 120/ 240 volt models.

c)240 volts ac for two wire 240 volt models.

7.Disconnect the dispenser from the power source.

If voltage is present as described the hopper delay board is operating properly.

If voltage is not present as described, replace the hop- per delay board.

Removal and Replacement:

1.Disconnect the eight pin plug from the hopper delay board.

2.Remove the two #8-32 keps nuts securing the hopper delay board mounting bracket to the dis- penser base.

3.Remove hopper delay board mounting bracket with hopper delay board and shield attached.

4.Remove the two #8-32 screws securing the hop- per delay board to the mounting bracket and dis- card the delay board.

5.Install new delay board on the mounting bracket with shield between the bracket and the delay board using two #8-32 screws.

6.Install mounting bracket with hopper delay board and shield over the studs on the dispenser base, secure with two #8-32 keps nuts.

7.Reconnect the eight pin connector to the hopper delay board.

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Contents BUNNHC-2 Serial # HC00025000 UPWarranty Introduction12368.0002 User Notices27620.0000 Electrical HOOK-UP Initial SET-UPElectrical Requirements Plumbing RequirementsDispenser USE CleaningAdjustments Cold Beverage SET-UP OptionalDraining the HOT Water Tank TroubleshootingHopper Dispense Rate of Product Troubleshooting Problem Probable Cause RemedyProblem On stainless steel surfaces can Problem Probable CauseDripping from dispense tip Lime build-up Ing in serious leaks30 or Weak product Water temperatureTesting procedure. See Tip with a thermometerTroubleshooting Problem Probable Cause RemedyContents ServiceComponent Access Auger Drive ComponentsWasher Auger Motor Locknut Dust Seal Shoulder Screw Auger Drive ComponentsIf voltage is present as described, proceed to #5 Hopper AssyService Right HC-2Ballast Test ProcedureLocation Location Mechanical Thermostat Remove temperature probe from the tankControl Thermostat Electronic Thermostat OptionalControl Thermostat Thermostat TerminalsDispense Switch Dispense SwitchTest Procedures FANRing Frother and Whipper MotorSteam Collector #6-32 Screw Mixing Chamber Pull the mixing chamber 2 out of the whipper chamberFrother and Whipper Motor Whipper Motor TerminalsHopper Delay Board Reconnect the eight pin connector to the hopper delay boardHOT/COLD Switch Optional Disconnect the wires from the switch termi- nalsLamp Holder Lamp Replacement Refer to FigDoor Assy Service Level Control Board and Level Probe Level Control Board and ProbeLevel Board Terminals Limit ThermostatOverflow Protection Switch Overflow Protection SwitchRUN/RINSE Switch RUN/RINSE SwitchSolenoid Valve Cold Water Optional Cold Water Solenoid ValveCold Water Solenoid Terminals Solenoid Valves DispenseDisconnect the water line from the solenoid valve Solenoid Valves DispenseSolenoid Valve Inlet Solenoid Valve Inlet Tank HeaterTank Heater Switch Refer to when reconnecting the wires to the tank heaterTank Heater Tank Heater Switch Tank Heater Switch TerminalsTransformer 240V TWO Wire MODELSONLYcontSchematic Wiring Diagram HC-2, & HC-3 Schematic Wiring Diagram HCA-2, & HCA-3

HC-2 HC-3 specifications

The Bunn HC-2 and HC-3 are high-performance commercial coffee brewers designed for cafes, restaurants, and institutions that prioritize quality, efficiency, and reliability. Renowned for their exceptional brewing capabilities, both models come with a range of features that cater to the demanding needs of coffee enthusiasts and professionals alike.

One of the core characteristics of the Bunn HC-2 and HC-3 is their brewing technology. These machines utilize a patented steeping mechanism that allows for optimal water temperature and contact time, extracting the finest flavors from the coffee grounds. The precise temperature control, maintained at a consistent level, ensures that every cup of coffee is brewed to perfection. Furthermore, the machines have an impressive brew capacity, with the HC-2 capable of brewing up to 3.8 gallons per hour, while the HC-3 can brew up to 5.3 gallons per hour, making them ideal for high-traffic environments.

Another significant feature of the Bunn HC-2 and HC-3 is their ease of use. The user-friendly interface allows baristas to quickly set brew cycles and adjust brewing parameters to suit different coffee types. Both models are designed with a sleek, ergonomic aesthetic that fits seamlessly into any workspace, while also being built with durable materials to withstand the rigors of daily use.

In terms of efficiency, these brewers come equipped with energy-saving technology. The automatic warmers on both machines adjust the heat output based on the coffee’s temperature, reducing energy consumption without compromising quality. Additionally, the compact design of these units means they occupy minimal counter space, making them suitable for both small and large establishments.

Maintenance is straightforward with the Bunn HC-2 and HC-3, as they feature a self-diagnostic system that alerts users to any potential issues. This feature minimizes downtime and ensures the longevity of the equipment. Furthermore, the brewing components can be easily accessed for cleaning and maintenance.

In summary, the Bunn HC-2 and HC-3 stand out in the commercial coffee brewing market with their advanced brewing technology, high capacity, user-friendly design, energy efficiency, and ease of maintenance. These features make them a preferred choice for anyone looking to deliver high-quality coffee consistently, ensuring that businesses can satisfy even the most discerning coffee drinkers. With Bunn’s commitment to innovation and quality, these brewers continue to set the standard in the coffee equipment industry.
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