Bunn HC-2 HC-3 Control Thermostat, Location Mechanical Thermostat, Electronic Thermostat Optional

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SERVICE (cont.)

CONTROL THERMOSTAT

MECHANICAL

 

 

P1199.45

ELECTRONIC (OPTIONAL)

 

FIG. 6 CONTROL THERMOSTAT

P1203.45

 

Location

 

Mechanical Thermostat

The mechanical thermostat is located on the upper right side of the rear panel inside the dispenser.

Electronic Thermostat (Optional)

The electronic thermostat is located on the right front side of the base just behind the front panel.

Test Procedure

Mechanical Thermostat

1.Disconnect the dispenser from the power source.

2.Disconnect the black wire of the control thermo- stat from the black lead from the limit thermo- stat.

3.Remove bulb from the tank.

4.Check the voltage across black wire on the con- trol thermostat and the white pole on the termi- nal block with the tank heater switch in the “ON” lower position with a voltmeter. Connect the dis- penser to the power source. 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.

5.Disconnect the dispenser from the power source.

If voltage is present as described the control thermo- stat is operating properly. Reinstall bulb into the tank. If voltage is not present as described, replace the ther- mostat.

Electronic Thermostat (Optional)

1.Disconnect the dispenser from the power source.

2.Disconnect the black wire of the control thermo- stat from the black lead from the limit thermostat.

3.Remove temperature probe from the tank

4.Check the voltage across black wire on the control thermostat and the white pole on the terminal block with the tank heater switch in the “ON” lower position with a voltmeter. Connect the dispenser to the power source. 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.

5.Disconnect the dispenser from the power source.

If voltage is present as described the control thermo- stat is operating properly.Reinstall teperature probe into the tank.

If voltage is not present as described, replace the ther- mostat.

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27591 031597

 

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Contents BUNNHC-2 Serial # HC00025000 UPWarranty Introduction12368.0002 User Notices27620.0000 Initial SET-UP Electrical RequirementsElectrical HOOK-UP Plumbing RequirementsCleaning AdjustmentsDispenser USE Cold Beverage SET-UP OptionalDraining the HOT Water Tank TroubleshootingHopper Dispense Rate of Product Troubleshooting Problem Probable Cause RemedyProblem Problem Probable Cause Dripping from dispense tip Lime build-upOn stainless steel surfaces can Ing in serious leaksWeak product Water temperature Testing procedure. See30 or Tip with a thermometerTroubleshooting Problem Probable Cause RemedyService Component AccessContents Auger Drive ComponentsAuger Drive Components If voltage is present as described, proceed to #5Washer Auger Motor Locknut Dust Seal Shoulder Screw Hopper AssyService Right HC-2Ballast Test ProcedureLocation Remove temperature probe from the tank Control ThermostatLocation Mechanical Thermostat Electronic Thermostat OptionalControl Thermostat Thermostat TerminalsDispense Switch Dispense SwitchTest Procedures FANFrother and Whipper Motor Steam Collector #6-32 Screw Mixing ChamberRing 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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