Bunn System III manual Overflow Protection Switch

Page 29

SERVICE (cont.)

OVERFLOW PROTECTION SWITCH

 

 

 

1

 

3TL

2

LT

 

TL

 

5

4L

 

 

TL

T

 

 

 

 

 

P2231.35

FIG. 21 OVERFLOW PROTECTION SWITCH

Location:

The overflow protection switch is located inside the hood on the tank inside the copper overflow cup.

To test the overflow protection switch, access will also be needed to the level control board or DBC board assembly and terminal block.

Test Procedure:

1.Disconnect the brewer from the power source.

2.Remove the wire nuts connecting the red wires from the overflow protection switch to the black wire from the terminal block or DBC board assem- bly, and blue wire from the thermostat or the red wire from the DBC board assembly.

3.Check for continuity across the overflow protec- tion switch red wires only until the plastic float is raised and check that continuity returns when the plastic float is again lowered.

If continuity is present as described, reconnect the red wires to the black wire from the terminal block or DBC Board Assembly, and the blue wire from the thermo- stat or red wire from DBC board assembly.

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

Removal and Replacement:

1.Disconnect the red leads from the overflow pro- tection switch from the black wire from the termi- nal block or DBC board assembly and the blue wire from the thermostat or red wire from DBC board assembly.

2.Remove the nut beneath the copper overflow cup.

3.Remove the entire switch assembly from the cup.

4.Place the new switch assembly into the cup, wires

first. Make sure that a gasket is in place around the threaded switch stem.

NOTE - The magnets must be at the top of float and there must be NO adjusting washers installed for the overflow protection switch to operate prop- erly.

5.Install the nut beneath the copper overflow cup. Be sure not to overtighten.

6.Refer to Fig. 22 when reconnecting wires.

RED to BLK Wire from

 

 

 

 

RED to BLU Lead from Ther-

 

 

Terminal Block (Electro/

 

 

 

 

 

mostat (Electro/Mechani-

 

 

 

 

 

Mechanical)

 

 

 

 

cal)

 

RED to BLK Wire from

 

 

 

 

RED to RED Wire from DBC

DBC Board J3-12

 

 

 

 

Board J3-11

 

 

FIG. 22 OVERFLOW PROTECTION

P1103

 

SWITCH TERMINALS

 

Page 29

27362

092996

 

 

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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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