Bunn TB3Q-LP service manual Tank Heater

Page 25

SERVICE (cont.)

 

 

TANK HEATER

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

 

 

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 and water inlet 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.

P3047

7.

Install new tank heater with gaskets on the tank

FIG. 18 TANK HEATER

 

lid and secure with two hex nuts.

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 and water inlet 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 230 volt

 

13.

Refer to Fig.19 when reconnecting the tank heater

models. Connect the brewer to the power source.

 

wires.

The indication 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.

BLK to Control

Thermostat

3. Disconnect the brewer from the power source.

 

If voltage is present as described, proceed to #4

WHI to Power Cord

(100/120V)or

If voltage is not present as described, refer to the

RED to Thermal Fuse

Wiring Diagrams and check wiring harness.

(230V)

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.FIG. 19 TANK HEATER TERMINALS P1284.80

Page 25

37236 050305

 

Page 24 Page 26
Image 25
Page 24 Page 26
Contents Phone 217 529-6601 FAX 217 TB3Q TB3Q-LPBUNN-O-MATIC Commercial Product Warranty ContentsIntroduction #37881.0000 User Notices#06064.0000 #32540.0000Plumbing Requirements Electrical RequirementsProceed as follows Electrical Hook-UpCentrate Machines will Yield only 76 OZ Initial SET-UPAuto Sweetener SET-UP Adjusting Brew Volumes Auto Sweetener Cleaning CleaningOperating Controls TEA Brewing Problem Probable Cause Remedy TroubleshootingProblem TroubleshootingProbable Cause RemedyTicles clogging the drip-out tip Drip-out time too long Funnel TipSweetener is not working Sweetener box is empty Sure it is not out of productDripping from sprayhead Brew TimerSyphon System Lime Build-up Beverage overflows dispenser Brew Solenoid ValveProblem Probable Cause Remedy Component Access ServiceTest Procedures Disconnect the brewer from the power source ServiceBrew Solenoid Valve 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- mostatRefer to when reconnecting the wires Location ON/OFF SwitchSwitch terminals On the switch terminalStart 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
Related manuals
Manual 11 pages 51.02 Kb

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.
Top Page Image Contents