Bunn TU3 service manual Control Thermostat

Page 20

SERVICE (cont.)

 

mostat is turned fully clockwise. Connect the

CONTROL THERMOSTAT

 

brewer to the power source. The indication must

 

be:

 

 

 

 

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

 

 

b) 240 volts ac for two wire 240 volt models.

 

 

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

 

8.

Disconnect the brewer from the power source.

 

If voltage is present as described, reinstall the capil-

 

lary tube into the tank to the line 4.5" above the bulb,

 

the control thermostat is operating properly.

 

If voltage is not present as described, replace the ther-

 

mostat.

 

Removal and Replacement:

P1276.40

1.

Remove both wires from the control thermostat

FIG. 8 CONTROL THERMOSTAT

 

terminals.

 

 

Location:

2.

Remove the thermostat capillary bulb by firmly

The control thermostat is located inside hood on

 

pulling up on the capillary tube at the tank lid. This

the right side just behind the dilution timer.

3.

will disengage the grommet from the tank lid.

 

Remove the #8-32 screw holding the control ther-

Test Procedures:

 

mostat to its bracket.

1. Disconnect the brewer from the power source.

4.

Slide the grommet to the line 4.5" above the bulb

2. Locate the blue/black wire on the control thermo-

 

on the new capillary tube.

stat.

5.

Insert the capillary bulb through the hole in the

3. With a voltmeter, check the voltage across the blue/

 

tank lid and press the grommet firmly and evenly

black wire on the control thermostat and the white

 

so that the groove in the grommet fits into the

wire on the tank heater for 100 volt and 120 volt

 

tank lid.

two wire models or red wire on the tank heater for

6.

Carefully bend the capillary tube so that the tube

240 volt two wire models. Connect the brewer to

 

and bulb inside the tank are in a vertical position.

the power source. The indication must be:

NOTE Ð The capillary tube must be clear of any elec-

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

trical termination and not kinked.

b) 240 volts ac for two wire 240 volt models.

7.

Fasten the new control thermostat to its bracket.

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

8.

Refer to Fig. 9 when reconnecting the wires.

4. Disconnect the brewer from the power source.

9.

Adjust the control thermostat as required.

 

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

 

If voltage is not present as described, refer to the

 

Wiring Diagrams and check the brewer wiring har-

BLK to Tank

ness.

Heater

5. Locate the black wire on the control thermostat.

6.Gently remove the capillary bulb and grommet from the tank.

7. With a voltmeter, check the voltage across the

 

 

BLU/BLK to Limit

 

 

 

 

 

 

black wire of the control thermostat and the white

 

 

Thermostat

 

 

 

 

 

 

 

wire on the tank heater for 100 volt and 120 volt

 

 

 

 

 

two wire models or red wire on the tank heater for

 

 

 

P1280

240 volt two wire models when the control ther-

 

 

 

 

 

FIG. 9 CONTROL THERMOSTAT TERMINALS

 

 

 

Page 20

10225

021599

 

 

 

 

 

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Contents TU3 Phone 217 529-6601 FAX 217Introduction ContentsBUNN-O-MATIC Commercial Product Warranty #03408.0002 #03409.0002 #03408.0000 #03409.0000 User Notices#00831.0000 #00656.0000 Electrical Hook-Up Electrical RequirementsPlumbing Requirements Initial SET-UP StoppedInitial SET-UP Adjusting Brew VolumesAuto Sweetener SET-UP Cleaning Operating ControlsTEA Brewing Auto Sweetener CleaningCleaning Remedy TroubleshootingProblem Probable Cause Remedy TroubleshootingProblem Problem Probable Cause Remedy Dilution cycle will not start Dilution Solenoid ValveSpitting or excessive steaming Drip-out time too long Control ThermostatFunnel Tip Ticles clogging the drip-out tipSee Dilution Timer Ing Water TemperatureBeverage overflows dispenser Dispenser Dilution Solenoid ValveRemove and clean lime off the tank heater. See Dry tea leaves remain in the funnelContents ServiceComponent Access Solenoid valve ServiceBrew Solenoid Valve Service Brew Timer Early Models Brew TimerService Digital Brew Timer Late Models If voltage is as described, proceed to #7Digital Timer Wiring Control Thermostat Dilution Solenoid Valve Dilution Solenoid ValveDilution Timer Limit Thermostat Indication must beIng Diagrams and check the wiring harness ON/OFF SwitchON/OFF Switch Selector Switch Optionalcont Start Switch Start SwitchSweetener Solenoid Valve Optional Tank Heater 10225 071500 10225 071500 Single Phase Volts AC10225 071500
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TU3 specifications

The Bunn TU3 is a renowned commercial coffee brewer known for its reliability and performance in bustling coffee shops, restaurants, and diners. Designed to cater to high-demand environments, the TU3 stands out with a variety of features that ensure an optimal brewing experience.

One of the primary characteristics of the Bunn TU3 is its capability to brew large volumes of coffee efficiently. It has a 3-gallon capacity, making it ideal for establishments that serve numerous customers throughout the day. This model can produce up to 19 gallons of coffee per hour, allowing establishments to keep pace with customer demand without sacrificing quality or flavor.

At the heart of the Bunn TU3's performance are its advanced brewing technologies. The brewer features a patented "multi-stream" spray head that evenly distributes hot water over coffee grounds, ensuring optimal extraction for a richer taste. This technology contributes to the consistent flavor profile that customers expect in a quality cup of coffee.

The TU3 is also equipped with a built-in hot water faucet, providing added convenience for brewing tea or instant beverages. Operators can easily access boiling water without interfering with the brewing process, streamlining service during peak hours. The adjustable temperature settings further enhance control over the brewing process, allowing for customization based on the coffee type or personal preference.

In terms of construction, the Bunn TU3 is built to withstand the rigors of commercial use. The brewer boasts a durable stainless steel body that is not only stylish but also easy to clean, helping maintain a professional appearance in any setting. Additionally, the brewer's design incorporates features such as a splash guard and easy-to-use controls, making it user-friendly for staff members.

Energy efficiency is another highlight of the Bunn TU3. Its innovative design helps in reducing energy consumption while still providing rapid brewing capabilities. This feature is particularly appealing to environmentally conscious operators looking to minimize their operational impact.

Overall, the Bunn TU3 coffee brewer combines speed, reliability, and exceptional brewing technology, making it a top choice for businesses that prioritize quality coffee service. Its combination of durability, efficiency, and user-friendly features ensures that it can handle the demands of any high-volume coffee operation, delivering excellent results cup after cup.
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