SERVICE (cont.)

 

 

240 volt two wire models when the control ther-

CONTROL THERMOSTAT

 

 

 

 

mostat is turned fully clockwise. Connect the

 

 

 

 

 

 

 

 

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.

 

 

FIG. 8 CONTROL THERMOSTAT

P2207.40

 

 

 

 

 

Removal and Replacement:

 

 

 

 

 

Location:

 

1. Remove both wires from the control thermostat

 

 

terminals.

 

 

The control thermostat is located inside hood on

 

 

 

2. Remove the thermostat capillary bulb by firmly

the right side just behind the dilution timer.

 

 

 

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

 

 

 

 

Test Procedures:

 

 

will disengage the grommet from the tank lid.

 

3.

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

1. Disconnect the brewer from the power source.

 

mostat to its bracket.

 

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

 

 

4. Slide the grommet to the line 4.5" above the bulb

 

stat.

 

 

 

 

on the new capillary tube.

 

3.

With a voltmeter, check the voltage across the blue/

 

 

5. Insert the capillary bulb through the hole in the

 

black wire on the control thermostat and the white

 

 

tank lid and press the grommet firmly and evenly

 

wire on the tank heater for 100 volt and 120 volt

 

 

 

so that the groove in the grommet fits into the

 

two wire models or red wire on the tank heater for

 

 

 

tank lid.

 

 

240 volt two wire models. Connect the brewer to

 

 

 

6. Carefully bend the capillary tube so that the tube

 

the power source. The indication must be:

 

 

 

 

and bulb inside the tank are in a vertical position.

 

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

 

 

 

 

 

 

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

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

 

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

trical termination and not kinked.

 

4. Disconnect the brewer from the power source.

7. Fasten the new control thermostat to its bracket.

 

 

 

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

8. Refer to Fig. 9 when reconnecting the wires.

 

9. Adjust the control thermostat as required.

 

If voltage is not present as described, refer to the

 

 

 

 

Wiring Diagrams and check the brewer wiring har-

 

 

 

ness.

 

 

BLK to Tank

 

5. Locate the black wire on the control thermostat.

 

Heater

 

 

 

 

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

 

 

Page 20

FIG. 9 CONTROL THERMOSTAT TERMINALS

 

 

 

10145

072600

 

 

 

 

Page 19 Page 21
Page 20
Image 20
Bunn T3A, T6A service manual Control Thermostat
Page 19 Page 21

T6, T6A, T3A specifications

The Bunn T6A, T3A, T6, and T3 are part of a distinguished line of commercial coffee brewers engineered for consistency, efficiency, and top-notch brew quality. These machines are well-suited for cafes, restaurants, and specialty coffee shops where reliability and performance are paramount.

The Bunn T6A is designed to brew large quantities, accommodating high-demand environments. With a capacity of six gallons per hour, this machine can quickly fulfill orders, ensuring that customers receive fresh, hot coffee without delay. It features a programmable touchpad that allows users to customize brew settings, enabling them to fine-tune extraction times and temperatures for various coffee blends. The T6A’s dual-float system provides precise water control, preventing overflow and enhancing safety.

The Bunn T3A is another exceptional model in this lineup, designed for both versatility and speed. It boasts a three-gallon capacity, making it ideal for medium-sized establishments. The T3A is equipped with Bunn's patented SplashGard funnel, which helps protect users from hot water splashes, providing an additional layer of safety. Its advanced brewing technology allows for an optimal brew temperature range, ensuring that coffee is extracted to perfection every time.

The Bunn T6 is similar to the T6A in its heavy-duty construction but focuses on a slightly different brewing capacity. Capable of producing back-to-back brews, the T6 can keep up with high-volume demands. This model features a digital brewer interface, making it user-friendly while providing detailed feedback on the brewing process. Its robust design allows for easy maintenance, ensuring it remains in peak operating condition.

Lastly, the Bunn T3 serves as a compact alternative in the series, suited for locations with limited space but requiring high-quality coffee. The T3 can brew up to three gallons per hour, seamlessly fitting into smaller setups without compromising on performance. Like its counterparts, it features programmable settings and quick brew times, providing flexibility and efficiency.

Together, the Bunn T6A, T3A, T6, and T3 represent a versatile range of commercial coffee brewing solutions. Each model is designed to deliver exceptional coffee, maintain consistent quality, and provide ease of use, making them integral tools for any serious coffee business. Whether high volume or limited space, Bunn caters to diverse needs while upholding the highest standards in coffee brewing technology.
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