Bunn HC-2 HC-3 service manual Dispense Switch

Page 18

SERVICE (cont.)

5. Disconnect the dispenser from the power source.

DISPENSE SWITCH

P1196.70

FIG.8 DISPENSE SWITCH

Location:

The dispense switches are located on the lower outside of the dispenser door.

NOTE: The center dispense switch is for HC-3 Models only.

Test Procedure:

1.Disconnect the dispenser from the power source.

2.Open the dispenser door and remove the bottom door cover.

3.Disconnect the connector of the dispense switch to be tested from the connector on the door interconnect wiring harness.

4.Check for voltage across the black and red/black wires for the right dispense switch, black and red/white wires for the center dispense switch or the black and red wires for the left dispense switch in the connector of the door interconnect wiring harness. Connect the dispenser to the power supply. 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.

If voltage is present as described, proceed to #6.

If voltage is not present as described, refer to the wir- ing diagram and check the dispenser wiring harness.

6.Check for continuity across the wires removed from the dispense switch with the switch in the “ON” pressed position. Continuity must not be present when the switch is in the “OFF” released position.

If continuity is present as described, reconnect the connector to the door interconnect wiring harness, the switch is operating properly.

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

Removal and Replacement

1.Open the dispenser door.

2.Remove the six #8-32 screws securing the bot- tom door cover and remove cover.

3.Disconnect the connector on the dispense switch to be removed from the door interconnect wiring harness connector.

4.Remove the mounting nut from the dispense switch and remove switch from the front side of the door.

5.Install new switch through the front of the door and secure with mounting nut.

6.Reconnect the connector on the dispense switch to the connector on door interconnect wiring har- ness.

7.Reinstall the door bottom cover using six #8-32 screws.

8.Refer to the illustration below when reinstalling wires.

 

P1205.58

18

FIG. 9 DISPENSE SWITCH CONNECTORS

27591 031597

 

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Contents BUNNHC-2 Serial # HC00025000 UPWarranty IntroductionUser Notices 12368.000227620.0000 Electrical HOOK-UP Initial SET-UPElectrical Requirements Plumbing RequirementsDispenser USE CleaningAdjustments Cold Beverage SET-UP OptionalTroubleshooting Draining the HOT Water TankHopper 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-2Test Procedure BallastLocation 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 Replacement Refer to Fig Lamp HolderDoor 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 DispenseSolenoid Valves Dispense Disconnect the water line from the solenoid valveSolenoid Valve Inlet Solenoid Valve Inlet Tank HeaterRefer to when reconnecting the wires to the tank heater Tank Heater SwitchTank 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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