Bunn TNTF-3 service manual Service, Brew Solenoid Valve HOT TEA, Solenoid valve

Page 15

SERVICE (cont.)

If continuity is not present as described, replace the

BREW SOLENOID VALVE (HOT TEA)

solenoid valve.

 

 

6.

Check the hot tea solenoid valve for coil action.

 

 

 

Connect the brewer to the power source. With

 

 

 

ICED/OFF/HOT switch in the "HOT" position press

 

 

 

the start switch and listen carefully in the vicinity

 

 

 

of the solenoid valve for a "clicking" sound as the

 

 

 

coil magnet attracts.

 

 

 

7.

Disconnect the brewer from the power source.

 

 

If the sound is heard as described and water will not

 

 

pass through the solenoid valve, there may be a block-

 

 

age in the water line before the solenoid valve or, the

 

 

solenoid valve may require inspection for wear, and

 

 

removal of waterborne particles.

 

 

If the sound is not heard as described, replace the

 

 

solenoid valve.

 

 

P1391.60

Removal and Replacement:

 

FIG. 2 HOT TEA BREW SOLENOID VALVE

1.

Remove all wires from solenoid valves.

Location:

2.

Turn off the water supply to the brewer.

 

Viewing the brewer from the rear, the hot tea brew

3.

Disconnect the water lines to and from the sole-

solenoid valve is mounted on the left side of the

 

noid valves.

 

mounting bracket.

4.

Remove the two #8-32 keps nuts holding the

 

 

 

mounting bracket to the brewer base.

Test Procedures:

5.

Lift out the bracket.

 

1. Disconnect the brewer from the power source.

6.

Remove the two #10-32 slotted-head screws hold-

2. Disconnect the white/red and white/green wires

 

ing the hot tea solenoid valve to the mounting

 

from the hot tea solenoid valve. With the ICED/

 

bracket.

 

 

OFF/HOT switch in the "HOT" position press the

7.

Securely install the new hot tea solenoid valve to

 

start switch.

 

the mounting bracket.

3.

With a voltmeter, check the voltage across the

8.

Attach the mounting bracket to the brewer base.

 

white/red and white/green wires. Connect the

9.

Securely fasten the water lines to and from the

 

brewer to the power source. The indication must

 

solenoid valves.

 

 

be 120 volts ac for two wire 120 volt models and

10.

Refer to Fig.3 when reconnecting the wires.

 

three wire 120/208 volt models.

WHI/GRN to Hot Tea

WHI/RED to Hot Tea Timer TL 1

4.

Disconnect the brewer from the power source.

Timer TL 4

WHI/VIO to Dilution Solenoid

 

 

 

 

 

 

 

 

WHI/VIO to Iced Tea Brew Timer TL 1

If voltage is present as described, proceed to #5

 

WHI/BLU to Iced Tea Timer TL 4

If voltage is not present as described, refer to Wiring

 

WHI/VIO to Iced Tea

Diagram and check brewer wiring harness.

 

Brew Timer TL 1

 

 

 

 

 

5. Check for continuity across the hot tea solenoid

HOT TEA BREW

 

 

 

valve coil terminals.

SOLENOID

 

 

 

ICED TEA BREW

 

 

 

 

 

WHI/BLU to Iced

If continuity is present as described, reconnect the

SOLENOID

 

 

DILUTION

Tea Timer TL 4

white/red and white/green wires from the hot tea brew

 

 

 

 

SOLENOID

 

 

timer.

FIG.3 SOLENOID VALVE TERMINALS

P1364

 

Page 15

 

 

28201

081598

 

 

 

 

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Contents Telephone 217 529-6601 FAX 217 Post Office BOX SPRINGFIELD, IllinoisContents WarrantyIntroduction #00831.0000 #00656.0000 #03408.0000 #03409.0000 User NoticesElectrical Requirements Plumbing RequirementsElectrical Hook-Up Initial SET-UP Plumbing RequirementsInitial SET-UP Adjusting Brew VolumesOperating Controls CleaningICED/OFF/HOT Switch Start SwitchTroubleshooting Problem Probable CauseRemedy Remedy TroubleshootingProblem Brew cycles will not start Brew TimerProblem Probable Cause Remedy Probable Cause Remedy Beverage overflows dispenser Dispenser Water flows into tank continuously Brew TimerOr HOT position PositionFunnel Brewer is making unusal noises Solenoids Remove and clean lime off the tank heater. SeeWeak beverage Filter Type Tea Sprayhead Funnel Loading Dry tea leaves remainService Component AccessContents Service Brew Solenoid Valve HOT TEASolenoid valve Brew Solenoid Valve Iced TEA HOT TEA Brew Timer Brew Timer HOT TEA Early ModelsIf voltage is as described, proceed to #7 Brew Timer HOT TEA Late ModelsDigital Timer Wiring Service Brew Timer HOT TEA Late MODELScontBrew Timer Iced TEA Early Models Iced TEA Brew Timer Brew Timer Iced TEA Late MODELScont Control Thermostat Test Procedures Disconnect the brewer from the power sourceDilution Solenoid Valve Test Procedure Disconnect the brewer from the power sourceLimit Thermostat Limit ThermostatICED/OFF/HOT Switch ICED/OFF/HOT SwitchStart Switch Start SwitchTank Heater Indication must beEls Thermal Fuse Service Thermal Fuse Models W/Faucet Only28201
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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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