Bunn TB3Q-LP service manual UNSWEET/OFF/SWEET Switch Sweetner Option

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SERVICE (cont.)

UNSWEET/OFF/SWEET SWITCH (Sweetner Option)

P3034

FIG. 14 UNSWEET/OFF/SWEET SWITCH

Location:

The UNSWEET/OFF/SWEET switch is located in the front of the hood, above and to the left of the brew funnel.

Test Procedure:

1.Disconnect the brewer from the power source.

2.With a voltmeter, check the voltage across the black wire and white wire on the selector switch.

3.Connect the brewer to the power source. The in- dication must be:

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

b)230 volts ac for two wire 230 volt models.

c)100 volts ac for two wire 100 volt models.

4.Disconnect the brewer from the power source.

If voltage is present as described, proceed to #5.

If voltage is not present as described, refer to the Wir- ing Diagrams and check the wiring harness.

5.Disconnect the black and white wires from the center terminals.

6.Disconnect the brown/white and white/violet wires from the right side terminals.

7.Check for continuity across the center and right terminals in rows one through four when the switch is in the "SWEET” position.

If continuity is present as described, replace the wires on the right side and proceed to #8.

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

8.Disconnect the white/violet wires on the left side terminal.

9.Check for continuity across the center and left side terminals in rows one through four when the switch is in the "UNSWEET” position.

If continuity is present as described, replace the wires the switch is operating properly.

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

Removal and Replacement:

1.Remove the wires from the switch terminals.

2.Compress the clips inside the hood and gently push the switch through the opening.

3.Push the new switch into the opening and spread the clips to hold the switch captive in the hood.

4.Refer to FIG. 15 when reconnecting the wires.

 

BLK to Power Cord

WHT/GRN to

Brew Sol

BRN/WHI to

 

Sweetener Sol

WHT/VIO

 

to Brew

 

Timer TL1

 

 

WHT to Power Cord

 

P1763

 

FIG.15 UNSWEET/OFF/SWEET

 

SWITCH TERMINALS

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37236 050305

 

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Contents Phone 217 529-6601 FAX 217 TB3Q TB3Q-LPIntroduction ContentsBUNN-O-MATIC Commercial Product Warranty #32540.0000 User Notices#37881.0000 #06064.0000Electrical Hook-Up Electrical RequirementsPlumbing Requirements Proceed as followsCentrate Machines will Yield only 76 OZ Initial SET-UPAuto Sweetener SET-UP Adjusting Brew Volumes Operating Controls CleaningAuto Sweetener Cleaning TEA Brewing Problem Probable Cause Remedy TroubleshootingRemedy TroubleshootingProblem Probable CauseSure it is not out of product Drip-out time too long Funnel TipTicles clogging the drip-out tip Sweetener is not working Sweetener box is emptyBeverage overflows dispenser Brew Solenoid Valve Brew TimerDripping from sprayhead Syphon System Lime Build-upProblem Probable Cause Remedy Component Access ServiceSolenoid valve ServiceTest Procedures Disconnect the brewer from the power source Brew Solenoid ValveIf voltage is as described, proceed to #7 Digital Brew TimerDigital Timer Wiring Service Digital Brew TimerControl Thermostat Control ThermostatLimit Thermostat Remove the blue/black wire from the limit ther- mostatOn the switch terminal ON/OFF SwitchRefer to when reconnecting the wires Location Switch terminalsStart Switch Start SwitchUNSWEET/OFF/SWEET Switch Sweetner Option Sweetner Solenoid Valve Sweetner Solenoid ValveTank Heater Volts AC Volts AC Wire Single PhaseSchematic Wiring Diagram TB3QA
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TB3Q, TB3Q-LP specifications

The Bunn TB6Q, TB3-LP, TB6, TB3Q, and TB3Q-LP coffee brewers are a popular series of commercial machines designed for high efficiency and optimal performance in busy environments such as cafes, restaurants, and offices. These machines are crafted with a focus on quality, dependability, and advanced brewing technology to deliver a superior coffee experience.

One of the standout features across the Bunn TB series is the ability to brew large quantities of coffee quickly. The TB6Q, for instance, can brew up to 6 gallons of coffee per hour. This high volume brewing capability ensures that establishments can keep up with demand, especially during peak hours. Additionally, the machines come with a unique design that incorporates a pre-infusion feature, allowing for the coffee grounds to be evenly saturated before brewing begins, enhancing the flavor extraction process.

The TB3-LP model is designed for low-profile applications where counter space may be limited. Despite its compact design, it still offers impressive performance, brewing up to 3.8 gallons per hour. The low-profile feature makes it an ideal choice for settings that require efficiency and space optimization without compromising on the quality of the brew.

Another notable member of the series, the TB3Q and TB3Q-LP, feature a quick brew ratio, allowing users to brew up to 3 gallons of coffee in just a few minutes. These models are equipped with easy-to-use controls for simplified operation, making them perfect for staff training and user accessibility.

All models in the TB series include a hot water faucet, allowing users to dispense hot water for tea or other hot beverages quickly. This versatility adds significant value, especially in multi-beverage settings.

Regarding durability, the Bunn TB series is constructed with high-quality materials, ensuring longevity and reliability. The machines also feature internal components that are easy to access for maintenance, thus reducing downtime and improving the overall efficiency of the machine.

In terms of technology, these brewers often incorporate advanced diagnostics to promptly identify service needs or issues. The machines come with a precise brewing temperature control system that ensures each cup is brewed at the optimal temperature for maximum flavor extraction.

Overall, Bunn's TB6Q, TB3-LP, TB6, TB3Q, and TB3Q-LP coffee brewers represent the culmination of advanced brewing technology and practical design for commercial coffee solutions. Their efficiency, quality, and ease of use make them a staple in many establishments, solidifying Bunn's reputation as a leader in the coffee brewing industry.
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