Bunn System III manual Initial SET-UP, Adjusting Brew Volumes, Electro/mechanical brewers

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INITIAL SET-UP

CAUTION – The brewer must be disconnected from the power source throughout the initial set-up, except when specified in the instructions.

1.Remove the front panel beneath the sprayhead.

Models with digital brewer control assembly:

Place the tank heater toggle switch at the bottom left of the control assembly in the "OFF" position.

Models with electro/mechanical thermostats:

Rotate the control thermostat knob fully counterclockwise to the "OFF" position.

2.Connect the brewer to the power source. Water will begin flowing into the tank.

3.When water stops flowing into the tank, remove the front panel and proceed as directed.

Models with digital brewer control assembly:

Place the tank heater toggle switch at the bottom left of the control assembly in the "ON" position and replace the front panel.

Models with electro/mechanical thermostats:

Rotate the control thermostat knob fully clockwise to the "ON" position and replace the front panel.

4.On 208V or 240V Models , wait approximately twenty-five minutes for the water in the tank to heat to the proper temperature.

5.Place an empty server beneath the brew station. Place the Selector switch in the desired position, the ON/OFF switch in the "ON" (upper) position and initiate a brew cycle. Each volume must be set individually.

6.Place the ON/OFF switch in the "OFF" (lower) position after water has stopped flowing from the funnel, and check the water volume in the server. It should be 128 oz (1 gallon), 192 oz (1-1/2 gallon) or 256 oz (2 gallon).

7.(A) If not, adjust the brew timer as required. See Adjusting Brew Volumes for electro/mechanical brewers. See Service - Digital Brewer Control Board for DBC Brewers. Allow the water to reheat, start, and measure another brew cycle.

(B) If necessary adjust the needle valve to achieve water volume to be bypassed around the coffee filter in the funnel.

NOTE: To increase the water bypass turn the needle valve counterclockwise, to decrease the water bypass turn the needle valve clockwise. An adjustment to the needle valve will require a timer adjustment for desired volume.

8.Repeat step 7 until the proper water volume is achieved.

9.The brewer is now ready for use in accordance with the coffee brewing instructions.

ADJUSTING BREW VOLUMES

electro/mechanical brewers

CAUTION - Disconnect the power source from the brewer prior to the removal of any panel for the replacement or adjustment of any component.

NOTE: Prior to setting or modifying batch sizes, check that the brewer is connected to water supply, the tank is properly filled, and a funnel and server are in place.

1.Modifying batch sizes. To modify a batch volume, first check that the SET/LOCK switch is in the “SET” position on the circuit board. Select the batch volume to be set. (1, 1-1/2, or 2 gallons)

NOTE: Each batch setting must be adjusted separately.

To increase a batch size. Press and hold the START or BREW switch until three clicks are heard. Release the switch (Failure to release the switch within two seconds after the third click causes the volume setting to be aborted and previous volume setting will remain in memory) and press it again one or more times. Each time the switch is pressed, two seconds are added to the brew time period. Allow the brew cycle to finish in order to verify that the desired volume has been achieved.

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Contents Bunn Warranty 20201.5600 00831.0000 00656.0000 03408.0000 03409.0000 User NoticesElectrical Requirements Models with digital brewer control assemblyModels with electro/mechanical thermostats Plumbing RequirementsElectro/mechanical brewers Adjusting Brew VolumesInitial SET-UP Brew Selector Switch CleaningStart Switch Operating ControlsProblem Probable Cause Remedy TroubleshootingOverflow protection switch Troubleshooting ProblemBrew cycle will not start Digital Brewer Control Assem- bly DBCTroubleshooting Problem Probable Cause Remedy Warmer element Triac assembly DBCSprayhead or airvent Mechanical StepDBC volume adjustment Time adjustment ElectroTimer adjustment Procedures. See page 34 orTroubleshooting Problem DBC display is blank Digital brewer control Cannot access the DBC Digital brewer controlContents ServiceComponent Access Bypass Valve ServiceLocation ServiceELECTRO/MECHANICAL Brew Selector SwitchGently remove the capillary bulb and grommet from the tank Contactor Assembly ELECTRO/MECHANICAL onlyContactor Assembly Terminals Service Contactor Assembly ELECTRO/MECHANICAL onlyOnly Test Procedures Disconnect the brewer from the power sourceElectromechanical Dispense ValveTION, Entry and Description Digital Brewer Control Board and Display DBCService Digital Brewer Control Board and Display DBC TRIAC/HEAT Sink TRIAC/HEAT Sink Assembly DBC onlyP2231.30 Terminals Limit Thermostat Limit ThermostatBlack wire from the center terminal Service ON/OFF Warmer SwitchThree wire 120/240 volt models ModelsTest Procedure Disconnect the brewer from the power source Overflow Protection SwitchRefill Solenoid Valve Service Solenoid Valve RefillRefill Solenoid Terminals Start Switch Location Tank HeaterTimer ELECTRO/MECHANICAL Onlyearly Models If voltage is as described, proceed to #7 Digital Timer ELECTRO/MECHANICAL only Late ModelsDigital Timer Wiring Timer SettingWarmer Element Lower 27362 092900 Lower

System III specifications

The Bunn System III is a versatile and efficient commercial brewing system designed for high-demand environments such as cafés, restaurants, and catering operations. Renowned for its reliability and performance, the System III combines advanced brewing technology with user-friendly features to deliver exceptional coffee consistently.

One of the key features of the Bunn System III is its innovative brewing technology, which employs a unique infuser system. This design allows for optimal extraction of coffee flavors by ensuring that hot water is evenly distributed over the coffee grounds, maximizing flavor and ensuring a rich, balanced cup every time. The brewing system can brew up to 3.8 gallons of coffee per hour, making it an ideal choice for busy establishments.

The System III is equipped with an impressive built-in water heater that maintains a temperature of approximately 200°F, which is crucial for brewing coffee at the ideal temperature. This consistent temperature control minimizes the risk of under-extraction or over-extraction, resulting in better-tasting coffee. Additionally, the hot water faucet feature allows users to brew tea or instant beverages on demand, further enhancing the system's versatility.

Another characteristic that sets the Bunn System III apart is its user-friendly interface. The system is designed with intuitive controls, allowing baristas and kitchen staff to operate it with minimal training. The easy-to-read digital display provides critical information such as brew time and water temperature, ensuring that users can monitor the brewing process closely.

Durability is a hallmark of the Bunn System III. Constructed from high-quality materials, this brewing system is designed to withstand the rigors of commercial use. Its robust design ensures longevity and minimizes the need for frequent maintenance, making it a cost-effective choice for businesses.

The Bunn System III also features a large-capacity brew basket, capable of holding ample coffee grounds for high-volume brewing. This basket, combined with the system's efficient design, allows for quick and easy brewing, making it perfect for high traffic situations.

In conclusion, the Bunn System III coffee brewing system is a top choice for commercial coffee operations. Its advanced brewing technology, consistent temperature control, user-friendly features, and durable construction combine to create an exceptional brewing experience. Whether in a café, restaurant, or catering service, the Bunn System III stands out as an indispensable tool for delivering high-quality coffee efficiently.
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