Bunn CDS-3, CDS-2 service manual Transformer

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SERVICE (cont.)

TRANSFORMER

P1930

FIG. 23 TRANSFORMER

Location:

The transformer is located under the hopper sup- port panel mounted to the left of the whipper motor.

Test Procedures:

1.Disconnect the dispenser from the power source.

2.Disconnect the four pin connector from the main wiring harness from the four pin connector on the transformer.

3.Check the voltage across the black wire (pin 1) and the white wire (pin 2) on the plug from the main wiring harness. Connect the dispenser to the power source. The indication must be:

a)120 volts ac for 120 volt models.

b)230 volts ac for 230 volt CE models.

4.Disconnect the dispenser from the power source.

If voltage is present as described, reconnect the plug and the connector and proceed to #5.

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

5.Check the voltage between J1-2 and J1-3 on the twelve pin connector at the control board. Connect the dispenser to the power source. The indication must be 24 volts ac.

If voltage is present as described, the transformer is operating properly.

If voltage is not present as described, replace the transformer.

Removal and Replacement:

1.Remove the hopper from the dispenser.

2.Remove the four #8-32 screws securing the hopper support panel to the dispenser.

3.Disconnect the red/black and green wires from the hopper switch and set the hopper support panel aside.

4.Disconnect the transformer four pin connector from the four pin plug on the main wiring harness.

5.Remove the two #6-32 keps nuts securing the transformer to the dispenser base. Remove and discard the transformer.

6.Install the new transformer on the dispenser base and secure with two #6-32 keps nuts.

7.Connect the four pin connector on the transformer to the four pin plug on the main wiring harness.

8.Reconnect the red/black and green wires to the hopper switch. See Fig. 10 on page 17.

9.Install the hopper support panel and secure with four #8-32 screws.

10.Install the hopper assembly.

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29793 011500

 

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Contents Post Office BOX SPRINGFIELD, Illinois Phone 217 529-6601 FAX 217Initial SET-UP BUNN-O-MATIC Commercial Product WarrantyIntroduction User Notices Operating Instructions Adjustments Removing and cleaning the whipper chamber once a day CleaningRecommended Daily Cleaning and Maintenance Tips Thorough cleaning of the hopper once a weekDispense Fault ListNormal operation Powder Auto-Fill ready to Door not closedTroubleshooting Problem Probable CauseRemedy TroubleshootingProblem CDS product tastes watery or sugaryProblem Probable Cause Remedy Install a regulator if necessary to Procedures. SeeImproper adjustment of product Product overflows CDS hopper Control Board and ProbeContents ServiceComponent Access Retainer Clip Auger Drive ComponentsHopper Lid Spacer Dust Seal Hopper BaseDiagrams and check wiring harness Auger Drive MotorFrother and MIXING/WHIPPER Chamber Mixing ChamberWhipper Motor Volts ac for 120 volt models Volts ac for 230 volt CE modelsInstall dispense tip into the bottom of the whipper chamber Whipper MotorIf voltage is present as described, proceed to #9 Control Board and Level ProbeIf voltage is present as described, proceed to #5 Test Procedure Low Product Detect Instal the new control board using the four #6-32 keps nuts Remove the control boardLocation TEST/SERVICE SwitchDisconnect the wires from the switch terminals Main Power ON/OFF Switch Main Power ON/OFF SwitchLamp Cord Assembly Refer to when reconnecting the wiresRemove new nut and washer from new lamp cord connector Lamp Cord ConnectorDisconnect the lamp cord from the lamp cord connector Lamp HOLDER/SOCKET Assembly Close the dispenser doorTransformer TransformerPotentiometer PotentiometerHopper Level Indicator Hopper Level IndicatorHopper Switch Hopper SwitchDoor Switch Door SwitchAdjustments Pressure Regulator and Needle ValveDispense Solenoid Valve Dispense Solenoid Valve LocationWiring Diagrams Schematic Wiring Diagram PAFSchematic Wiring Diagram Pafa
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CDS-2, CDS-3 specifications

The Bunn CDS-3 is a commercial coffee brewer renowned for its reliability, efficiency, and high-quality performance. Designed for busy environments such as cafés, restaurants, and convenience stores, it offers the perfect balance of capacity and functionality, making it ideal for high-demand situations.

One of the standout features of the Bunn CDS-3 is its ability to brew up to 3.8 gallons of coffee per hour. This impressive capacity meets the needs of busy establishments where a constant supply of fresh coffee is crucial. The brewer’s stainless steel construction not only ensures durability but also maintains temperature, thus preserving the coffee’s rich flavor and aroma.

The CDS-3 incorporates Bunn's patented brewing technology, including the "Pour-Over" method. This feature allows for easy operation and contributes to the even extraction of coffee grounds. The machine is equipped with a pre-infusion mode that saturates coffee grounds before brewing, enhancing extraction for a fuller, more complex flavor profile.

Temperature control is another vital characteristic of the Bunn CDS-3. It maintains the water temperature between 195°F to 205°F, the ideal range for optimal coffee brewing. The brewer’s internals are designed for rapid heating, ensuring that the water reaches the desired temperature quickly and consistently, which is essential for high-quality coffee production.

In terms of usability, the Bunn CDS-3 offers an intuitive interface, allowing staff to operate it with minimal training. The front-access design not only simplifies maintenance, but also makes it easy to refill water and perform routine cleaning. Furthermore, the large capacity coffee pots ensure that the brewed coffee can be stored efficiently, minimizing waste.

Equipped with a unique spray head system, the Bunn CDS-3 ensures uniform saturation of the coffee grounds. This feature supports optimal extraction, allowing users to produce a rich and flavorful brew that keeps customers coming back for more.

In summary, the Bunn CDS-3 is a well-engineered, commercial-grade coffee brewer that excels in high-demand environments. Its robust construction, advanced brewing technology, consistent temperature control, and user-friendly design make it a favorite among coffee enthusiasts and professionals alike, affirming its reputation as a reliable and effective solution for coffee brewing needs. Whether for a bustling café or a catering service, the Bunn CDS-3 delivers a consistently great cup of coffee every time.
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