Bunn CDBC APS, CDBCF TC, CDBCF APS, CDBC TC manual Tank Heaters, Valve from the bottom of the tank

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SERVICE (cont.)

TANK HEATERS

Location:

The tank heaters are located inside the tank and secured to the tank bottom.

Test Procedures :

1.Disconnect the brewer from the power source.

2.With a voltmeter, check voltage across the white or red wire from the terminal block and black wire from the control board. Connect brewer to the power source. The indication must be 120 volts ac for two wire 120 volt models or 208-240 volts ac for three wire 120/208-240 volt models.

3.Disconnect the brewer from the power source.

4.Check voltage across the red wire from the termi- nal block and black wire from the control board. Connect brewer to the power source. The indica- tion must be 208 or 240 volts ac.

5.Disconnect the brewer from the power source.

If voltage is present as described, proceed to #6

If voltage is not present as described, refer to the Wiring Diagrams and check wiring harness.

6.Disconnect the black and blue wires or the red and white/violet wires from the tank heater terminals.

7.Check for continuity across tank heater terminals.

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.

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

Removal and Replacement:

1.Remove the top cover or top warmer housing and front access panel as previously described.

2.Disconnect the vent hose from the top of the tank by pulling the elbow fitting from the grommet in the top of the tank lid.

3.Drain water from the tank.

4.Disconnect the water supply tube to the dispense valve from the side of the tank.

5.Disconnect the water supply tube to the solenoid

P1890

FIG. 8 TANK HEATERS

valve from the bottom of the tank.

6.On brewers with faucet, disconnect the outlet water line to the faucet from the side of the tank.

7.Disconnect the temperature probe from the top of the tank by pulling the probe from the grommet in the top of the tank lid.

8.Disconnect the pink wire from the level probe.

9.Disconnect the green wire from the top of the tank.

10.Disconnect the limit thermostat from the side of the tank.

11.Disconnect the two white wires from the tank warmer blanket.

12.Disconnect the black, blue, white/violet and red wires from tank heater terminals.

13.Remove the four #8-32 nuts securing the tank to the mounting brackets and remove the tank as- sembly.

14.Remove the eight #8-32 nuts securing the tank lid to the tank.

15.Remove the two hex nuts securing the tank heater to the bottom of the tank. Remove tank heater with gaskets and discard.

16.Install new tank heater(s) with gaskets to the bottom of the tank and secure with two hex nuts.

17.Install tank assembly onto mounting brackets and secure in place with four #8-32 nuts.

18.Install tank lid and secure in place with eight #8-32 nuts.

19.Connect the two white wires of the tank warmer blanket.

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29707.1 082803

 

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Contents Disco Ntinued V ERS ION Contents IntroductionCdbcf APS-DV Brewers User NoticesCDBCF-DV Brewers Cdbcf APS-DV & TC-DV Brewers#02765.0000 #12364.0000 #00656.0000 Models CDBC-DV, CDBC-APS DV & Cdbcf TC-DV Electrical RequirementsCoffee Brewing Plumbing RequirementsInitial SET-UP Faucet ModelsCleaning Operating ControlsAdjustments & Optional Settings Setting Brew TemperatureNow disabled Pulse Brew Setup ProceedureWater Sensing Threshold Adjustment Procedure Troubleshooting Before troubleshooting this brewer, check for the followingRemedy TroubleshootingRefill Circuit Problem Probable Cause Troubleshooting Refill Circuit Heating Circuit Problem Water does not heat to proper tem- peratureTank Heater Troubleshooting Heating CircuitProblem Probable Cause Ings are takenProblem Probable Cause Remedy Brewing Circuit Problem Probable Cause Dispenser Be made with sprayhead installed Troubleshooting Brewing CircuitConsistently low beverage level Brew volume Brew cycle will not start Control board or dispense valveDripping from sprayhead Lime build up Water temperatureSet-upinstructions RequiredProblem Probable Cause Diagnostics Cause Things to CheckWhen servicing, except when electrical tests are re Component AccessService Control BoardSwitch Panel Dispense Valve Limit Thermostat Wiring Limit ThermostatTank Heaters Valve from the bottom of the tank29707.1 Voltage Selector Switch Voltage Selector Switch TerminalsRefill Valve Warmer Elements Schematic Wiring Diagram Cdbc DV Schematic Wiring Diagram Cdbc APS-DV Cdbcf APS/TC/LPTC-DV

CDBC TC, CDBC APS, CDBCF TC, CDBCF APS specifications

The Bunn CDBCF series of coffee brewers is an essential tool for any coffee business, renowned for its reliability and efficiency. This series offers different models including the CDBCF APS (Automatic Pour-Over) and CDBCF TC (thermo carafe), among others. Each of these brewers is designed to produce exceptional quality coffee while ensuring ease of use.

One of the main features of the Bunn CDBCF APS is its automatic pour-over capability, which ensures that water is heated to the perfect brewing temperature and dispensed consistently. This model is equipped with a stainless steel water tank that maintains optimal water temperature, resulting in flavorful coffee extraction. Furthermore, the APS model allows for quick brewing cycles, producing up to 3.8 gallons of coffee per hour, making it ideal for high-demand environments.

The CDBCF TC model, on the other hand, utilizes a thermal carafe to keep coffee hot for extended periods without the need for a hot plate. This technology not only preserves the coffee’s flavors and aromas but also minimizes energy consumption. The thermal carafe can hold up to 1.9 liters of brewed coffee, making it efficient for serving in busy settings.

Both models in the CDBCF series come with a simple interface for straightforward programming and operation. Features such as the BrewLOGIC technology help regulate the brewing time and monitor water flow to ensure consistency. This is particularly beneficial in maintaining the quality of coffee across multiple brewing batches.

In terms of build quality, Bunn CDBCF brewers are constructed with durable materials designed to withstand the wear and tear of daily use in busy coffee shops. Their compact design requires minimal counter space while providing a high volume of output.

Overall, the Bunn CDBCF APS and TC models stand out for their advanced brewing technologies, versatility, and user-friendly design. They cater perfectly to coffee enthusiasts and business owners looking for reliable brewing solutions that deliver consistent quality and taste. With the Bunn CDBCF series, coffee brewing becomes not only an art but also an efficient and seamless process.
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