Bunn Understanding the Lighted On/Off Switch for TB6 Coffeemakers
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SERVICE (cont.)

LIGHTED ON/OFF SWITCH (TB3/TB3Q)

P/N 37080.0000

Orange light

FIG. 14-1 LIGHTED ON/OFF SWITCH

Location:

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

Test Procedure:

Brewers W/Out Half Batch or Sweetener Options

1.Disconnect the brewer from the power source.

2.Remove the wires from all four terminals.

3.Check for continuity across the two terminals on the lower right of the switch (as shown). Continuity must be present across these terminals in the ON position.

If continuity is present as described, reconnect the wires, the switch is operating properly. If continuity is not present as described, replace the switch.

NOTE: No continuity will show across the upper left terminals of the lighted switch since the light is neon.

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. 14-2 when reconnecting the wires.

BLACK

WHITE

WHT/VIO

P/N 37080.0000

2 WHT/VIO

FIG. 14-2 LIGHTED ON/OFF SWITCH TERMINALS

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Contents TB3/TB6 Series Phone 217 529-6601 FAX 217BUNN-O-MATIC Commercial Product Warranty Contents To the brewer Probable Cause RemedyBrew cycle will not start No water Probable Cause ProblemBrew cycle will not start Water is not hot Control Thermostat Tank HeaterReactions resulting in serious Inconsistent beverage levelSurfaces can initiate corrosive LeaksBeverage overflows dispenser Refer to Service Timer for test- ing proceduresSpitting or excessive steaming Dripping from sprayhead Plumbing Lines Water Supply Dry coffee grounds remainFunnel Brewer is making unusal noises Cont Tank heater Problem Probable Cause RemedyBrewer is making unusal noises Tank Heater Location Control thermostat is located in the hood Component AccessControl Thermostat Disconnect the control thermostat wires Adjust the control thermostat as requiredRemove all wires from limit thermostat termi- nals Limit Thermostat1680W-120V 1680W-100V 1680W-230V 29.0 33.7 Disconnect the brewer from the power supplyTank Heater Orange light Lighted ON/OFF Switch TB3/TB3QRefer to -2 when reconnecting the wires Switch Switch is located on the front control panelThrough four when the switch is in the oposite Position If continuity is present as described, replace the wiresStart Switches 37080.0001to T. StatInlet Valves BREW/DILUTION Timer TB3 & TB6 BREW/DILUTION Timer Triacs Triacs TH-1/MV-1 Brew solenoid TH-2/MV-2 Dilution solenoidWhite Red Neutral L2 Digital Brew Timer TB3Q & TB6QTerminals ½ batch connector Digital Timer Triacs Triacs MV-2 Brew solenoid output MV-1 LineSchematic Wiring Diagram TB3Q Volts AC Wire Single PhaseSchematic Wiring Diagram TB3, TB3B, TB3-LP Schematic Wiring Diagram TB3Q Schematic Wiring Diagram TB3Q W/SWEETENER & Empty BAG Detect Schematic Wiring Diagram TB6 Schematic Wiring Diagram TB6Q
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TB6Q, TB6 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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