Bunn CDBCF TC, CDBCF APS, CDBC APS, CDBC TC manual Dispense Valve

Page 24

SERVICE (cont.)

DISPENSE VALVE

6. Connect the voltmeter lead ends to the dispense valve coil terminals. Connect the brewer to the power source. Brewer temperature lockout must be disabled. Place "ON/OFF" Switch in the "ON" position. Press and release the brew switch. The indication must be 120 volts ac.

7. Disconnect the brewer from the power source.

If voltage is present as described, but no coil action is observed, nor "clicking" heard, dispense valve is de- fective. Replace valve and test again to verify repair. If voltage is not present as described, refer to Wiring Diagrams and check the brewer wiring harness. Also check the control board and switch panel for proper operation. (See Pages 22 and 23.)

 

P1852

Removal and Replacement:

 

 

 

FIG. 4 DISPENSE VALVE

1.

Disconnect wires from the dispense valve.

 

 

2.

Drain enough water from the tank so the dispense

Location:

 

valve is above the water level.

 

The dispense valve is located inside the top cover

3.

Remove water lines from the dispense valve.

behind the front end cap.

4.

Remove the two #8-32 nuts securing the dispense

 

 

 

valve to the sprayhead panel.

Test Procedures:

5.

Install a new dispense valve using the two #8-32

1. Disconnect the brewer from the power source.

 

nuts.

2. Check the water level in the tank to confirm that it

6.

Reconnect water lines to the dispense valve and

 

is within 1/2" from the top of the tank.

 

secure in place with clamps.

3. Connect the brewer to the power source. If the

7.

Refer to FIG. 5 when reconnecting wires.

 

brewer has been set for brewer temperature lock-

 

 

 

out, this feature must be disabled. See Page 9 for

 

 

 

procedure.

 

WHI/GRN from

4.

Check the dispense valve for coil action. Place the

 

 

Control Board

 

ON/OFF switch in the "ON" position, press and

 

 

 

 

 

release the BREW switch. Listen carefully in the

 

WHI from Terminal

 

vicinity of the dispense valve for a "clicking" sound

 

Block

 

as the coil magnet attracts and repels the plunger.

 

 

5. Disconnect the brewer from the power source.

 

 

If the sound is heard as described, there may be a

 

 

blockage in the dispense valve or the water line to the

 

 

sprayhead. Remove the dispense valve and inspect for

 

P1853

wear, and remove waterborne particles.

 

 

FIG. 5 DISPENSE VALVE WIRING

If the sound is not heard as described, proceed to #6.

 

 

 

 

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29707.1 082803

 

 

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Contents Disco Ntinued V ERS ION Contents IntroductionUser Notices CDBCF-DV BrewersCdbcf APS-DV Brewers Cdbcf APS-DV & TC-DV Brewers#02765.0000 #12364.0000 #00656.0000 Models CDBC-DV, CDBC-APS DV & Cdbcf TC-DV Electrical RequirementsPlumbing Requirements Initial SET-UPCoffee Brewing Faucet ModelsCleaning Operating ControlsAdjustments & Optional Settings Setting Brew TemperaturePulse Brew Setup Proceedure Water Sensing Threshold Adjustment ProcedureNow disabled Troubleshooting Before troubleshooting this brewer, check for the followingTroubleshooting Refill Circuit Problem Probable CauseRemedy Troubleshooting Refill Circuit Heating Circuit Problem Water does not heat to proper tem- peratureTroubleshooting Heating Circuit Problem Probable CauseTank Heater Ings are takenProblem Probable Cause Remedy Brewing Circuit Problem Probable Cause Troubleshooting Brewing Circuit Consistently low beverage level Brew volumeDispenser Be made with sprayhead installed Brew cycle will not start Control board or dispense valveWater temperature Set-upinstructionsDripping from sprayhead Lime build up 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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