Bunn TU3 service manual Tank Heater

Page 28

SERVICE (cont.)

NOTE- If the tank heater remains unable to heat, re-

TANK HEATER

move and inspect heater for cracks in the sheath.

 

 

 

Removal and Replacement:

 

 

 

1.

Disconnect the black wire and the white or red

 

 

 

wire from the tank heater terminals.

 

 

2.

Remove sprayhead and the hex nut securing the

 

 

 

sprayhead tube to the hood. Set aside for reas-

 

 

 

sembly.

 

 

 

3.

Disconnect vent tube.

 

 

 

4.

Remove the six #10 thread cutting screws secur-

 

 

 

ing the tank lid to the tank.

 

 

5.

Remove the tank lid with limit thermostat, spray-

 

 

 

head tube, tank heater and vent tube.

 

 

6.

Remove the two hex nuts securing the tank heater

 

 

 

to the tank lid. Remove tank heater with gaskets

 

 

 

and discard.

 

 

 

7.

Install new tank heater with gaskets on the tank

 

P2202.40

 

lid and secure with two hex nuts.

 

FIG. 22 TANK HEATER

8.

Install tank lid with limit thermostat, sprayhead

Location:

 

tube, tank heater and vent tube using six #10

 

The tank heater is located inside the tank and se-

 

thread cutting screws.

 

cured to the tank lid.

9.

Secure sprayhead tube to hood using a hex nut.

Test Procedures:

10.

Install sprayhead.

 

11.

Connect vent tube to fitting.

1. Disconnect the brewer from the power supply.

12.

Reconnect the wires to the limit thermostat, tank

2.

With a voltmeter, check the voltage across the

 

heater. See limit thermostat section in this manual

 

black and white wires on 100 volt and 120 volt

 

when reconnecting wires.

 

models or the black and red wires for 240 volt

13. Refer to Fig. 23 when reconnecting the tank heater

 

models. Connect the brew to the power source.

 

wires.

 

 

The indication must be:

 

 

WHI to Power Cord (100V

 

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

BLK to Control

 

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

& 120V Models)

 

Thermostat

RED to Power Connector

 

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

 

 

 

(240V Models)

3.Disconnect the brewer from the power source. If voltage is present as described, proceed to #4

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

4.Disconnect the black wire and the white wire or red wire from the tank heater terminals.

5.Check for continuity across the tank heater termi- nals.

If continuity is present as described, reconnect the

 

 

 

 

wires, the tank heater is operating properly.

 

 

 

 

If continuity is not present as described, replace the

 

 

 

 

tank heater.

 

 

 

P1284

FIG. 23 TANK HEATER TERMINALS

 

Page 28

 

10225

071500

 

 

 

 

 

 

Page 27 Page 29
Image 28
Page 27 Page 29
Contents TU3 Phone 217 529-6601 FAX 217BUNN-O-MATIC Commercial Product Warranty ContentsIntroduction #00831.0000 #00656.0000 User Notices#03408.0002 #03409.0002 #03408.0000 #03409.0000 Plumbing Requirements Electrical RequirementsElectrical Hook-Up Initial SET-UP StoppedAuto Sweetener SET-UP Adjusting Brew VolumesInitial SET-UP Cleaning Operating ControlsCleaning Auto Sweetener CleaningTEA Brewing Problem Probable Cause TroubleshootingRemedy Problem TroubleshootingRemedy 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 funnelComponent Access ServiceContents Brew Solenoid Valve ServiceSolenoid 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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