Bunn HC-2 HC-3 service manual Tank Heater, Refer to when reconnecting the wires to the tank heater

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SERVICE (cont.)

TANK HEATER (cont.)

5.Check for continuity across the tank heater termi- nals.

If continuity is present as described, reconnect the wires, the tank heater is operating properly.

If continuity is not present as described, replace the tank heater.

NOTE - If the tank heater remains unable to heat, remove and inspect heater for cracks in the sheath.

Removal and Replacement:

1.Shut-off water supply to the dispenser.

2.Disconnect the water supply tube on the tank lid.

3.Disconnect the black wires on the limit thermo- stat.

4.Disconnect the black wire and the white or red wire from the tank heater terminals.

5.Disconnect the pink wire from the liquid level probe.

6.Remove the thermostat capillary bulb by firmly pulling-up on the capillary at the tank lid. This will disengage the grommet from the tank lid.

7.Remove the ten #8-32 nuts securing the tank lid to the tank.

8.Remove tank lid with limit thermostat, liquid level probe and tank heater as a assembly.

9.Remove the two hex nuts securing the tank heater to the tank lid. Remove tank heater with gaskets and discard.

10.Install new tank heater with gaskets on the tank lid and secure with two hex nuts.

11.Install tank lid with limit thermostat, liquid level probe and tank heater on the tank and secure with ten #8-32 hex nuts.

12.Connect water inlet line to the tank lid.

13.Reconnect the black wires to limit thermostat, the pink wire to the liquid level probe. Refer to the limit thermostat and the liquid level board and probe sections in this manual when reconnecting wires.

14.Refer to Fig. 30 when reconnecting the wires to the tank heater.

WHI or RED to

BLK to Limit

Terminal Block

Thermostat

 

FIG. 30 TANK HEATER TERMINALS

P1218

 

TANK HEATER SWITCH

FIG. 31 TANK HEATER SWITCH

P1199.35

 

Location:

 

The tank heater switch located inside the dis- penser on the upper right of the front panel.

34

27591 031597

 

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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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