Bunn HC-2 HC-3 service manual Ballast, Location, Test Procedure

Page 15

SERVICE (cont.)

BALLAST

 

FIG. 4 BALLAST

P1199.40

 

Location

 

The front door lamp ballast is located on the front center of the base behind the front panel.

Test Procedure

1.Disconnect the dispenser from the power source.

2.Disconnect the two terminal plug of the door in- terconnect harness from the connector of the ballast.

3.Check the voltage across the white wire and the blue wire terminal of the ballast with a voltmeter. Connect the dispenser to power source. The in- dication must be:

a)120 volts ac for two wire 120 volt models.

b)120 volts ac for three wire 120/208 volt models or 120/240 volts models.

c)240 volts ac for two wire 240 volt models.

If voltage is present as described the ballast is oper- ating properly.

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

Removal and Replacement

1.Disconnect the wires from the ballast.

2.Remove the two #8-32 keps nuts securing the ballast to the dispenser base.

3.Remove and discard ballast.

4.Install new ballast over the two weld studs on the dispenser base and secure with two #8-32 keps nuts.

5.Refer to the illustration below when reconnect- ing the wires.

WHI to Main

BLK to Terminal Block

 

Wiring Harness

 

WHI & BLU to

 

Door

 

Interconnect

 

Harness

 

120V, 120/208V, & 120/240V Models

 

WHI to Main

 

Wiring Harness

RED & BLU to

 

Door

 

Interconnect

 

Harness

 

 

BLK to Terminal Block

 

240V Models

 

P1202.45

FIG. 5 BALLAST TERMINALS

15

27591 031597

 

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Contents Serial # HC00025000 UP BUNNHC-2Introduction WarrantyUser Notices 12368.000227620.0000 Plumbing Requirements Initial SET-UPElectrical Requirements Electrical HOOK-UPCold Beverage SET-UP Optional CleaningAdjustments Dispenser USETroubleshooting Draining the HOT Water TankHopper Dispense Rate of Product 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 ServiceTest Procedure BallastLocation 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 OptionalLamp Replacement Refer to Fig Lamp HolderDoor 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 TerminalsSolenoid Valves Dispense Disconnect the water line from the solenoid valveSolenoid Valve Inlet Tank Heater Solenoid Valve InletRefer to when reconnecting the wires to the tank heater Tank Heater SwitchTank 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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