Bunn HC-2 HC-3 service manual Service

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SERVICE (cont.)

LAMP STARTER and SOCKET (120V, 120/208V & 120/240V Models Only)

Location:

The lamp starter (6) is located inside the door assy (1) on the top of the door bottom cover (5).

Test Procedures:

1.Disconnect the dispenser from the power source.

2.Disconnect the plug on the starter leads from the connector on the door wiring harness.

3.Remove lamp starter from starter socket.

4.Disconnect the two pin plugs of each of the starter sockets from the door wiring harness.

5.Check for continuity on each lead of the starter socket.

If continuity is present as described the starter socket is operating properly.

If continuity is not present as described replace the the starter socket.

6.Remove starter (6) from starter socket.

7.Check for continuity across the pins on the bottom of the starter (6).

If continuity is present as described , replace the starter.

If continuity is not present as described, starter is operating properly.

Note: If continuity test are both as described and lamp does not light, replace the starter socket.

Removal and Replacement (Refer to Fig.16):

1.Open dispenser door assy (1)

2.Remove the six #8-32 screws securing the door bottom cover (5) to the door assy (1).

3.Disconnect the plug on the starter socket and the connector on the door wiring harness.

4.Remove cover (5) with starter w/socket (6) as assembly.

5.Rotate starter 90° and remove from the starter socket.

6.Compress the spring tabs on the socket and re- move socket from the door bottom cover (5).

7.Install new socket by compressing spring tabs on the socket and pushing the socket up through the

hole in the bottom cover (5) and releasing spring tabs.

8.Insert new starter (6) into socket and turn 90° until the pins snap in place.

9.Connect the plug on the sockets leads to the connector on the door wiring harness.

10.Install door bottom cover (5) with starter and starter socket on door assy (1) using six #8-32 screws.

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Contents Serial # HC00025000 UP BUNNHC-2Introduction Warranty12368.0002 User Notices27620.0000 Electrical Requirements Initial SET-UPElectrical HOOK-UP Plumbing RequirementsAdjustments CleaningDispenser USE Cold Beverage SET-UP OptionalDraining the HOT Water Tank TroubleshootingHopper Dispense Rate of Product Problem Probable Cause Remedy TroubleshootingProblem Dripping from dispense tip Lime build-up Problem Probable CauseOn stainless steel surfaces can Ing in serious leaksTesting procedure. See Weak product Water temperature30 or Tip with a thermometerProbable Cause Remedy Troubleshooting ProblemComponent Access ServiceContents Auger Drive ComponentsIf voltage is present as described, proceed to #5 Auger Drive ComponentsWasher Auger Motor Locknut Dust Seal Shoulder Screw Hopper AssyRight HC-2 ServiceBallast Test ProcedureLocation Control Thermostat Remove temperature probe from the tankLocation Mechanical Thermostat Electronic Thermostat OptionalThermostat Terminals Control ThermostatDispense Switch Dispense SwitchFAN Test ProceduresSteam Collector #6-32 Screw Mixing Chamber Frother and Whipper MotorRing Pull the mixing chamber 2 out of the whipper chamberWhipper Motor Terminals Frother and Whipper MotorReconnect the eight pin connector to the hopper delay board Hopper Delay BoardDisconnect the wires from the switch termi- nals HOT/COLD Switch OptionalLamp Holder Lamp Replacement Refer to FigDoor Assy Service Level Control Board and Probe Level Control Board and Level ProbeLimit Thermostat Level Board TerminalsOverflow Protection Switch Overflow Protection SwitchRUN/RINSE Switch RUN/RINSE SwitchCold Water Solenoid Valve Solenoid Valve Cold Water OptionalSolenoid Valves Dispense Cold Water Solenoid TerminalsDisconnect the water line from the solenoid valve Solenoid Valves DispenseSolenoid Valve Inlet Tank Heater Solenoid Valve InletTank Heater Switch Refer to when reconnecting the wires to the tank heaterTank Heater Tank Heater Switch Terminals Tank Heater SwitchMODELSONLYcont Transformer 240V TWO WireSchematic 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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