Bunn HC-2 HC-3 service manual Service, Right HC-2

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SERVICE (cont.)

AUGER DRIVE COMPONENTS (cont.)

14.Install hopper assy (21) in the dispenser by slid- ing hopper assy in the guides on the hopper sup- port plate (20) until the slot in the bottom rear the hopper seats against the shoulder screw (19) in the hopper support plate.

Auger Drive Motor (Refer to Fig. 2)

1.Disconnect the wires from the auger motor (17) to be removed.

2.Remove hopper assy (21) and set aside for reas- sembly.

3.Left side auger motor only - Remove the #8-32 screw securing hose routing clamp (15) and au- ger motor (17) to the auger motor mounting bracket (16).

4.Remove the four #8-32 locking screws, located inside on the rear of the front housing, securing auger motor mounting bracket (16) and auger motor (17) to the rear of the front panel.

5.Remove auger motor mounting bracket (16), auger motor (17) and dust seal (18) as an as- sembly.

6.Remove dust seal (18) from auger motor (17).

7.Remove the three #8-32 screws securing the left auger motor to the auger motor mounting bracket or the four #8-32 screws securing the center and right auger motors to the auger motor mounting bracket.

8.Remove auger motor and discard.

9.Using three #8-32 screws on the left auger mo- tor or four #8-32 screw on the center or right auger motor install new auger motor (17) on mounting bracket (16).

10.Install dust seal (18) on auger motor shaft.

11.Using four #8-32 locking screws install auger motor, dust seal and mounting bracket to the rear of the front panel.

12.Left auger motor only - Using one #8-32 screw attach hose routing clamp (15) to the mounting bracket.

13.Reconnect the wires to the terminals on the bot- tom of the auger motor.

14.Install hopper assy (21).

15.Refer to the illustration below when reconnect- ing wires.

LEFT HC-2 & 3

CENTER HC-3 ONLY

RIGHT HC-2 & 3

WHI/BLK to Run/Rinse

WHI/BLK to Run/Rinse

WHI/BLK to

Switch

Switch

Run/Rinse

WHI/RED from Hopper

WHI/BLU from Hopper

Switch

Delay Circuit Board

Delay Circuit Board

WHI/VIO from Hopper

 

 

 

 

Delay Circuit Board

 

FIG. 3 AUGER MOTOR TERMINALS

T1201

 

 

 

14

27591 031597

 

 

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Contents BUNNHC-2 Serial # HC00025000 UPWarranty Introduction27620.0000 User Notices12368.0002 Electrical HOOK-UP Initial SET-UPElectrical Requirements Plumbing RequirementsDispenser USE CleaningAdjustments Cold Beverage SET-UP OptionalHopper Dispense Rate of Product TroubleshootingDraining the HOT Water Tank 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-2Location Test ProcedureBallast 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- nalsDoor Assy Lamp Replacement Refer to FigLamp Holder 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 DispenseSolenoid Valve Inlet Solenoid Valves DispenseDisconnect the water line from the solenoid valve Solenoid Valve Inlet Tank HeaterTank Heater Refer to when reconnecting the wires to the tank heaterTank Heater Switch 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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