Bunn TNTF-3 service manual Tank Heater, Indication must be, Els

Page 28

SERVICE (cont.)

TANK HEATER

FIG. 24 TANK HEATER

P2213.60

 

Location:

The tank heater is located inside the tank and se- cured to the tank lid.

Test Procedures:

1.

Disconnect the brewer from the power supply.

2.

With a voltmeter, check the voltage across the

 

black and white wires on 120 volt models or the

 

black and red wires for 120/208 volt models with

 

a voltmeter. Connect the brew to the power source.

 

The indication must be:

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 lid and secure with two hex nuts.

8.Install tank lid with limit thermostat, sprayhead tube, tank heater and vent tube using six #10 thread cutting screws.

9.Secure sprayhead tube to hood using a hex nut.

10.Install sprayhead.

11.Connect vent tube to fitting.

12.Reconnect the wires to the limit thermostat and tank heater. See limit thermostat section in this manual when reconnecting wires.

13.Refer to Fig.25 when reconnecting the tank heater wires.

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

b) 208 volts ac for three wire120/208 volt mod-

BLK to Control

WHI to Power Cord (120V Models) RED to Terminal Block (120/208V

els.

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.

Thermostat or Thermal Fuse

Models)

If continuity is not present as described, replace the tank heater.

NOTE- If the tank heater remains unable to heat, re- move and inspect heater for cracks in the sheath.

FIG. 25 TANK HEATER TERMINALS

P1369

 

 

 

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28201 081598

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Contents Post Office BOX SPRINGFIELD, Illinois Telephone 217 529-6601 FAX 217Warranty ContentsIntroduction User Notices #00831.0000 #00656.0000 #03408.0000 #03409.0000Plumbing Requirements Electrical RequirementsElectrical Hook-Up Plumbing Requirements Initial SET-UPAdjusting Brew Volumes Initial SET-UPCleaning ICED/OFF/HOT SwitchStart Switch Operating ControlsProblem Probable Cause TroubleshootingRemedy Troubleshooting ProblemBrew cycles will not start Brew Timer RemedyProblem Probable Cause Remedy Probable Cause Remedy Water flows into tank continuously Brew Timer Or HOT positionPosition Beverage overflows dispenser DispenserRemove and clean lime off the tank heater. See Weak beverage Filter Type Tea Sprayhead Funnel LoadingDry tea leaves remain Funnel Brewer is making unusal noises SolenoidsComponent Access ServiceContents Brew Solenoid Valve HOT TEA ServiceSolenoid valve Brew Solenoid Valve Iced TEA Brew Timer HOT TEA Early Models HOT TEA Brew TimerBrew Timer HOT TEA Late Models If voltage is as described, proceed to #7Service Brew Timer HOT TEA Late MODELScont Digital Timer WiringBrew Timer Iced TEA Early Models Iced TEA Brew Timer Brew Timer Iced TEA Late MODELScont Test Procedures Disconnect the brewer from the power source Control ThermostatTest Procedure Disconnect the brewer from the power source Dilution Solenoid ValveLimit Thermostat Limit ThermostatICED/OFF/HOT Switch ICED/OFF/HOT SwitchStart Switch Start SwitchIndication must be Tank HeaterEls Service Thermal Fuse Models W/Faucet Only Thermal Fuse28201
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TNTF-3 specifications

The Bunn TNTF-3 is a high-performance coffee brewer designed for commercial use, specifically suited for busy environments such as restaurants and cafes. This machine seamlessly combines efficiency with quality, making it a popular choice for professionals who demand the best in their equipment.

One of the standout features of the Bunn TNTF-3 is its three warmer plates, which allow users to brew and store multiple batches of coffee simultaneously. This design ensures that there’s always fresh coffee ready for customers, minimizing downtime during peak service hours. Each warmer has its own independent control, providing versatility in temperature settings to accommodate different coffee types and customer preferences.

The Bunn TNTF-3 utilizes a patented SplashGard funnel that helps to keep the brewing process clean and efficient. This technology not only prevents splashes and messes but also improves user safety by protecting operators from hot water and coffee spills. The brewer’s stainless steel construction contributes to its durability, enhancing its longevity in a high-volume setting.

In terms of brewing capabilities, the TNTF-3 can prepare up to 3.8 gallons of coffee per hour, making it ideal for both small and large operations. The machine is equipped with a brew control feature that allows users to customize the strength and flavor of the coffee, ensuring that each cup meets the highest standards. Additionally, the digital timer and brew status light offer convenient monitoring at a glance.

For ease of maintenance, the Bunn TNTF-3 is designed with accessibility in mind. With removable components and straightforward cleaning procedures, operators can keep the machine in top condition without significant downtime. The brewer also features a low-water shut-off system, which helps to protect the unit from damage due to insufficient water levels.

Overall, the Bunn TNTF-3 embodies a blend of innovative technology, practical design, and optimal performance, making it a powerful tool for coffee professionals. Whether it be for daily service or special events, the Bunn TNTF-3 stands out as a reliable coffee brewing solution that consistently delivers rich, flavorful coffee with every batch. Its combination of speed, safety, and quality assurance solidifies its status as a preferred choice in commercial settings.
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