SERVICE (cont.)

Control Thermostat

P1478

FIG. 2 CONTROL THERMOSTAT

Location:

The control thermostat is located under the top cover or top warmer housing, FIG. 2.

To test the control thermostat, access will also be needed to the tank heater located in the bottom of the tank assembly.

Test Procedure:

1.Disconnect the brewer from the power source.

2.Check the voltage across the blue wire on the control thermostat and the white or red wire on the tank heater with a voltmeter. Connect the brewer to the power source. The indication must be:

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

b)200 or 240 volts ac for two wire 200 volt or 240 volt models and three wire 120/240 volt models.

c)100 volts ac for two wire 100 volt 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 the brewer wiring harness.

4.Check the voltage across the black wire terminal of the control thermostat and the white or red wire on the tank heater with a voltmeter when the control thermostat is turned “ON” (fully clockwise). Connect the brewer to the power

source. The indication must be as described in step 2. Voltage must not be indicated across these terminals when the thermostat is turned “OFF” (fully counterclockwise).

5.Disconnect the brewer from the power source.

If voltage is present as described, the control thermo- stat is operating properly.

If voltage is not present as described, replace the control thermostat.

Removal and Replacement:

1.Remove the top cover or top warmer housing from the brewer to gain access.

2.Remove both wires from the control thermostat terminals.

3.Remove the thermostat bulb by firmly pulling- up on the capillary tube at the tank lid. This will disengage the grommet from the tank lid.

4.Remove the two #8-32 screws holding the control thermostat to the bracket.

5.Fasten the new control thermostat to the compo- nent bracket.

NOTE - Make sure that the capillary tube is away from any electrical termination and is not kinked.

6.Slide the grommet to the red mark on the capillary tube.

7.Insert the bulb through the hole in the tank lid and press the grommet firmly and evenly so that the groove in the grommet fits into the tank lid.

8.Carefully bend the capillary tube so that the tube and bulb inside the tank are in a vertical posi- tion.

9.Refer to FIG. 3 when reconnecting the wires.

10.Readjust the control thermostat dial as re- quired.

BLU to Limit Thermostat

BLK to Tank Heater

P1098

FIG. 3 THERMOSTAT WIRING

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Bunn RL00006929 service manual Service Control Thermostat
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RL00006929 specifications

The Bunn RL00006929 is a commercial-grade coffee brewer that exemplifies innovation, efficiency, and durability, making it a preferred choice for coffee shops, restaurants, and large offices. This model is designed to meet high-volume demands while ensuring consistent quality and flavor in every cup.

One of the most notable features of the Bunn RL00006929 is its capacity to brew up to 3.8 gallons of coffee per hour. This remarkable output is facilitated by its dual-funnel design, which allows for simultaneous brewing, reducing wait times and enhancing service speed. The brewer is equipped with a precise temperature control system, ensuring that water is heated to the optimal brewing temperature of 200°F. This consistency in temperature plays a crucial role in extracting the full flavor profile from coffee grounds.

In terms of design, the Bunn RL00006929 boasts a compact footprint, making it suitable for various settings, including kitchens with limited space. The unit features a stainless steel construction, which not only provides a sleek appearance but also contributes to its durability and resistance to corrosion. Additionally, the easy-access design makes maintenance straightforward, allowing operators to clean and service the unit with minimal effort.

The RL00006929 incorporates advanced technologies that enhance its functionality. For instance, the machine features a digital control panel that provides real-time feedback on brewing status, water temperature, and other critical parameters. This intelligent system allows operators to make quick adjustments and ensures that brewing conditions are always optimal.

Another standout characteristic is the integrated brew basket that holds filters securely in place, preventing spills and ensuring a smooth brewing process. This feature minimizes mess and simplifies the coffee-making process, making it user-friendly for both experienced baristas and novice operators.

In summary, the Bunn RL00006929 stands out for its high brewing capacity, precise temperature control, compact design, and user-friendly features. Its combination of advanced technology and durability makes it an excellent investment for any establishment that demands quality coffee at high volumes. With Bunn's reputation for excellence, the RL00006929 is a reliable choice for delivering exceptional coffee experiences.
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