Bunn HC-2 HC-3 service manual Schematic Wiring Diagram HC-2, & HC-3

Page 37

SCHEMATIC WIRING DIAGRAM HC-2, & HC-3

 

 

 

 

 

 

 

GRN

 

L1

 

 

 

 

 

L2 N

 

ELECTROMECHANICAL THERMOSTAT CONFIGURATION

 

 

 

used!

 

HEATER SW.

 

 

 

 

 

BLK-16

BLU/BLK-16

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

be

 

THERMOSTAT

LIMIT

 

 

RED-16 (3-WIRE MODELS)

 

THERMOSTAT

 

 

MUST

 

BLK-16

TANK HEATER

 

BLU-16

BLK-16

BLK-16

WHI-16 (2-WIRE MODELS)

 

 

 

 

 

 

 

 

 

 

 

 

 

Configuration

ELECTRONIC THERMOSTAT CONFIGURATION

 

 

 

 

 

HEATER SW.

TAN

 

 

 

 

 

TAN

 

 

 

 

 

 

 

 

LIMIT

 

 

 

BLK-16

 

BLK-16

THERMOSTAT

 

TANK HEATER

RED-16 (3-WIRE MODELS)

ELECTRONIC

BLK-16

BLK-16

One

 

WHI-16 (2-WIRE MODELS)

 

THERMOSTAT

 

 

 

 

 

 

 

 

 

WHI

 

ASSEMBLY

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

OVERFLOW SWITCH

 

 

 

 

TANK INLET

 

BLK

 

 

 

 

 

 

BLK

RED

 

RED

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

VIO

 

 

WHI

 

 

 

 

WHI/VIO

1 HOPPER

 

BLK

 

 

 

 

LIQUID

1

 

SOL

 

 

 

 

WHI/BLU

 

 

 

 

 

BLU

 

 

 

 

 

 

2

DELAY

 

 

 

 

 

 

2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

LEVEL

 

 

 

 

WHI

 

 

 

 

 

3

 

 

 

 

 

 

 

3

 

 

 

 

 

BLK

 

BLK

BLK

 

 

 

 

 

 

BOARD

PNK-20

 

 

 

 

 

4

 

 

 

 

 

 

 

 

4

 

 

 

 

 

 

 

WHI/RED

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

5

 

 

 

 

 

 

 

 

 

 

 

PROBE

 

 

 

 

 

WHI/GRN

 

FLOURESCENT

 

 

 

 

 

 

 

 

 

 

 

 

 

6

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

WHI

WHI/GRN

7

 

 

LAMP

BLK

BLK 1

BLK

 

 

 

 

 

 

 

 

 

 

WHI

8

 

BALLAST

 

WHI

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

WHI

 

 

 

 

 

 

 

BLU

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

WHI

 

 

WHI

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Components

 

 

 

WHI

 

 

DISPENSE

WHI

WHIPPER

 

 

 

 

HOPPER

 

WHI

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

WHI/RED

SOL

WHI

WHI/RED

M

WHI

WHI/RED

M

 

WHI/BLK

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

RUN/RINSE SWITCH

 

HC1

 

 

 

 

 

 

 

 

 

 

 

 

WHI/GRN

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

-2)

 

 

 

 

 

WHI

 

WHI

 

 

 

 

 

 

 

 

 

WHI

 

 

 

 

 

RIGHT DISPENSE

 

RIGHT WHIPPER

 

 

RIGHT HOPPER

 

 

HC

 

 

 

WHI/VIO

SOL

WHI

WHI/VIO

M

WHI

WHI/VIO

M

 

WHI/BLK

 

ON

 

 

WHI/VIO

 

WHI/VIO

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Components

 

 

 

 

CENTER DISPENSE

 

CENTER WHIPPER

 

 

CENTER HOPPER

 

ELIMINATED

 

 

 

 

 

 

 

 

 

 

 

WHI/BLU

SOL

WHI

WHI/BLU

M

WHI

WHI/BLU

M

 

WHI/BLK

 

 

WHI/BLU

WHI/BLU

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

LEFT DISPENSE

 

LEFT WHIPPER

 

 

LEFT HOPPER

 

 

 

 

WHI/BRN

SOL

WHI

WHI/RED

M

WHI

WHI/RED

M

 

WHI/BLK

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

HC2 & HC3

COMPONENTS

 

 

 

 

 

 

 

 

 

 

 

 

RUN/RINSE SWITCH

 

 

 

 

 

 

 

 

 

 

 

WHI/GRN

 

 

 

 

 

 

 

 

COLD DRINK OPTION (LEFT ONLY)

 

 

 

WHI/GRN

 

 

WHI/BLK

 

 

 

 

 

 

 

 

 

 

 

 

 

WHI

4

WHI

 

SOL

 

 

 

 

 

 

 

 

 

 

 

WHI/BRN

 

WHI/BRN

 

 

 

 

 

 

JUMPER PLUG MUST BE

 

 

 

 

 

 

 

 

RED

 

 

 

(CENTER

 

 

WHI/RED

 

WHI/RED

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

USED WHEN COLD

 

 

 

WHI/RED

 

WHI/RED

 

 

 

 

 

RED

 

 

 

 

 

 

 

WHI/YEL

 

 

 

 

DRINK FEATURE NOT

 

 

 

 

1

 

 

 

 

 

RED

 

 

INSTALLED

 

 

 

 

 

HOT/COLD SWITCH

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1

4

1

 

 

 

 

 

 

GRN/WHI

 

BLU

 

 

 

 

 

WHI

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

GRN/BLK

 

BLU

 

 

 

1

 

BLK

 

 

 

 

 

 

 

 

 

 

 

1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

RED

 

 

 

 

BLK

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

BLK

STARTER

 

 

 

 

 

 

 

 

 

 

 

BLK

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

RED/WHI

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

RED/BLK

 

 

 

 

RED

1

 

BLK

 

 

 

 

 

 

 

 

 

1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

WHI

 

 

 

 

DISPENSE

 

 

 

DISPENSE SWITCH

 

 

 

 

 

 

 

 

 

 

SWITCH

 

 

 

(RIGHT, MODELS HC-2 & HC-3)

 

BLK

 

 

 

 

 

 

 

 

 

ASSY.

1

 

 

 

 

 

RED/BLK

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

4

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

BLK

 

 

 

DISPENSE SWITCH

1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

RED

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

4

 

 

(CENTER, MODEL HC-3 ONLY)

 

BLK

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

RED/WHI

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

120 VOLTS AC - 2 WIRE OR

 

 

 

 

4

 

 

 

 

 

 

 

 

1

 

 

 

 

 

120/208-240 VOLTS AC - 3 WIRE

 

DISPENSE SWITCH

 

 

 

 

 

 

 

 

 

 

 

 

 

SINGLE PHASE, 60 HZ

 

 

 

(LEFT, MODELS HC-2 & HC-3)

 

BLK

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(ALSO HC-1 SWITCH)

 

RED

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

4

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

37

27591 031597

 

Image 37
Contents Serial # HC00025000 UP BUNNHC-2Introduction Warranty12368.0002 User Notices27620.0000 Electrical Requirements Initial SET-UPElectrical HOOK-UP Plumbing RequirementsAdjustments CleaningDispenser USE Cold Beverage SET-UP OptionalDraining the HOT Water Tank TroubleshootingHopper Dispense Rate of Product Problem Probable Cause Remedy TroubleshootingProblem Dripping from dispense tip Lime build-up Problem Probable CauseOn stainless steel surfaces can Ing in serious leaksTesting procedure. See Weak product Water temperature30 or Tip with a thermometerProbable Cause Remedy Troubleshooting ProblemComponent Access ServiceContents Auger Drive ComponentsIf voltage is present as described, proceed to #5 Auger Drive ComponentsWasher Auger Motor Locknut Dust Seal Shoulder Screw Hopper AssyRight HC-2 ServiceBallast Test ProcedureLocation Control Thermostat Remove temperature probe from the tankLocation Mechanical Thermostat Electronic Thermostat OptionalThermostat Terminals Control ThermostatDispense Switch Dispense SwitchFAN Test ProceduresSteam Collector #6-32 Screw Mixing Chamber Frother and Whipper MotorRing Pull the mixing chamber 2 out of the whipper chamberWhipper 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 Holder Lamp Replacement Refer to FigDoor 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 TerminalsDisconnect the water line from the solenoid valve Solenoid Valves DispenseSolenoid Valve Inlet Tank Heater Solenoid Valve InletTank Heater Switch Refer to when reconnecting the wires to the tank heaterTank 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.