SERVICE (cont.)

TANK HEATER SWITCH (cont.)

Test Procedure:

1.Disconnect the dispenser from the power source.

2.Disconnect the black wire and the blue/black wire on electro/mechanical thermostats or the tan wires on electronic thermostats.

3.With the switch in the “ON” lower position check for continuity between the center and the upper terminal. With the switch in the “OFF” upper posi- tion no continuity should be present between center and upper terminals.

If continuity is present as described, the heater “ON/ OFF” switch is operating properly.

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

Removal and Replacement:

1.Remove the switch mounting nut on the front of the front panel.

2.Remove switch with wires attached from the rear of the front panel.

3.Remove the wires from the switch terminals and discard switch.

4.Connect the wires to the new switch, refer to fig. 32.

5.Push new switch through hole in the front panel and secure with face nut.

BLUBLK from Electro/ mechanical Thermostat or TAN from Electronic Thermostat

BLK from Terminal Block (Electro/mechani- cal)

TAN from Electronic Thermostat

P1219

FIG. 32 TANK HEATER SWITCH TERMINALS

TRANSFORMER (240V TWO WIRE MODELS ONLY)

FIG. 33 TRANSFORMER

P1289

 

Location:

The transformer is located behind the front cover just to the right of the ballest on the dispenser base.

Test Procedure:

1.Disconnect the dispenser from the power source.

2.Disconnect the two pin connector of the trans- former from the fan.

3.Connect voltmeter, set to read at least 120 volts ac across the black and white leads of the trans- former connector.

4.Connect the dispenser to the power source. The voltage indication should be approximately 120 volts ac.

5.Disconnect the dispenser from the power source.

If voltage is present as described the transformer is operating properly.

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

35

27591 031597

 

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Bunn HC-2 HC-3 service manual Tank Heater Switch Terminals
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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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