Bunn HC-2 HC-3 service manual Tank Heater Switch Terminals

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SERVICE (cont.)

TANK HEATER SWITCH (cont.)

Test Procedure:

1.Disconnect the dispenser from the power source.

2.Disconnect the black wire and the blue/black wire on electro/mechanical thermostats or the tan wires on electronic thermostats.

3.With the switch in the “ON” lower position check for continuity between the center and the upper terminal. With the switch in the “OFF” upper posi- tion no continuity should be present between center and upper terminals.

If continuity is present as described, the heater “ON/ OFF” switch is operating properly.

If continuity is not present as described, replace the switch.

Removal and Replacement:

1.Remove the switch mounting nut on the front of the front panel.

2.Remove switch with wires attached from the rear of the front panel.

3.Remove the wires from the switch terminals and discard switch.

4.Connect the wires to the new switch, refer to fig. 32.

5.Push new switch through hole in the front panel and secure with face nut.

BLUBLK from Electro/ mechanical Thermostat or TAN from Electronic Thermostat

BLK from Terminal Block (Electro/mechani- cal)

TAN from Electronic Thermostat

P1219

FIG. 32 TANK HEATER SWITCH TERMINALS

TRANSFORMER (240V TWO WIRE MODELS ONLY)

FIG. 33 TRANSFORMER

P1289

 

Location:

The transformer is located behind the front cover just to the right of the ballest on the dispenser base.

Test Procedure:

1.Disconnect the dispenser from the power source.

2.Disconnect the two pin connector of the trans- former from the fan.

3.Connect voltmeter, set to read at least 120 volts ac across the black and white leads of the trans- former connector.

4.Connect the dispenser to the power source. The voltage indication should be approximately 120 volts ac.

5.Disconnect the dispenser from the power source.

If voltage is present as described the transformer is operating properly.

If voltage is not present as described, replace the transformer.

35

27591 031597

 

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Contents Serial # HC00025000 UP BUNNHC-2Introduction Warranty27620.0000 User Notices12368.0002 Plumbing Requirements Initial SET-UPElectrical Requirements Electrical HOOK-UPCold Beverage SET-UP Optional CleaningAdjustments Dispenser USEHopper Dispense Rate of Product TroubleshootingDraining the HOT Water Tank Problem Probable Cause Remedy TroubleshootingProblem Ing in serious leaks Problem Probable CauseDripping from dispense tip Lime build-up On stainless steel surfaces canTip with a thermometer Weak product Water temperatureTesting procedure. See 30 orProbable Cause Remedy Troubleshooting ProblemAuger Drive Components ServiceComponent Access ContentsHopper Assy Auger Drive ComponentsIf voltage is present as described, proceed to #5 Washer Auger Motor Locknut Dust Seal Shoulder ScrewRight HC-2 ServiceLocation Test ProcedureBallast Electronic Thermostat Optional Remove temperature probe from the tankControl Thermostat Location Mechanical ThermostatThermostat Terminals Control ThermostatDispense Switch Dispense SwitchFAN Test ProceduresPull the mixing chamber 2 out of the whipper chamber Frother and Whipper MotorSteam Collector #6-32 Screw Mixing Chamber RingWhipper 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 OptionalDoor Assy Lamp Replacement Refer to FigLamp Holder 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 TerminalsSolenoid Valve Inlet Solenoid Valves DispenseDisconnect the water line from the solenoid valve Tank Heater Solenoid Valve InletTank Heater Refer to when reconnecting the wires to the tank heaterTank Heater Switch 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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