Bunn CDS-3 service manual Disconnect the fan leads from the main wiring harness

Page 32

SERVICE (cont.)

COMPRESSOR & COMPONENTS (CDS-3) (cont.)

Compressor Run Capacitor:

1. Check for continuity across the terminals on the compressor run capacitor.

If continuity is present as described, the run capacitor is operating properly.

If continuity is not present as described, replace the capacitor.

NOTE: If all the electrical components are operat- ing properly and the compressor does not operate, there is an internal mechanical problem. Replace the compressor.

Removal and Replacement:

Compressor Assy:

NOTE: Before removal of any refrigeration component the refrigerant in the system must be reclaimed by a licensed refrigeration repair person.

1.Disconnect the tubes from the condenser, accu- mulator also remove access valve and tube..

2.Disconnect the compressor wiring harness from the dispenser main wiring harness.

3.Remove the four .312”-18 screws, keps nuts and washers securing the compressor to the chassis. Set screws, nuts and washers aside for reassem- bly.

4.Remove the four #8-32 locking screws securing the component bracket to the dispenser chassis.

5.Pull the component bracket, with wires attached, out of the chassis far enough to gain access to the compressor.

6.Disconnect the compressor wiring harness from the compressor.

7.Remove the two #8-32 screws securing the con- tactor mounting bracket to the dispenser base.

8.Remove the contactor mounting bracket, contactor, contactor cover and the compressor wiring harness as an assembly. Set aside for reassembly.

9.Disconnect the fan leads from the main wiring harness.

10.Remove the three #6 thread cutting screws secur- ing the fan to the condenser shroud. Remove the fan and set aside for reassembly.

11.Slide the compressor out the right side of the dispenser.

12.Remove the four grommets and sleeves from the old compressor and install them on the new compressor.

13.Slide new compressor into position on the dispenser chassis, with the tube connections to the front.

14.Secure compressor to the dispenser chassis using four .312”-18 screws, washers and nuts.

15.Install the fan on the condenser shroud and secure with three #6 thread cutting screws.

16.Reconnect the leads on the fan to the main har- ness.

17.On dispensers serial number CDS0019500 - up install the contactor bracket, contactor, contactor cover and compressor wiring harness as an as- sembly. Secure contactor bracket to the chassis using two #8-32 screws.

18.Refer to Fig.17A and reconnect the wires to the compressor.

19.Position the component bracket in the chassis and secure with four #8-32 locking screws.

20.Reconnect tubes from the condenser and the accumulator to the compressor, also reconnect access valve and tube.

21.Evacuate the system.

NOTE: When replacing the compressor it is recom- mended that the dryer also be replaced.

22.Dispensers prior to serial number CDS0019500 recharge system with 25 oz. of Type R404A re- frigerant. Design Pressures: High 320 - Low 44 Dispensers serial number CDS0019500 - up re- charge system with 22 oz of type R404A refrigerant. Design Pressures: High 380 - Low 52

NOTE: The charging of the system must be done by a licensed refrigeration repair person.

RED from

 

Relay T2

 

WHI from

 

Relay T4

 

BLK from

 

Relay T-5

 

FIG. 17A COMPRESSOR TERMINALS

P1819

 

32

27646 122200

 

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Contents CDS-2 CDS-3 Post Office BOX SPRINGFIELD, IllinoisContents Introduction28720.0000 27443.0000 User Notices12559.0003 00986.0002 CDSA-2 Only User Notices27664.0000 Site preparation Electrical RequirementsInitial setup Hand Each cooling drum sealAs shown Place Inside of each auger shaftApproximately Operating Controls DAY/NIGHT Timer Setting TimeSetting Night Time Mode Operating ControlsUsing the Dispenser for GRANITA-TYPE Products Using the Dispenser for Cold Liquid ProductsOther Recommendations for Your Dispenser Recommended Daily Cleaning Sugar & Alcohol products Recommended Weekly Cleaning LubricationDisassembly AssemblyLubrication Faucet HandlesAuger assembly & Disassembly Early Augers only Snap it onto the assemblyTroubleshooting Problem Probable Cause RemedyAuger Motor won’t turn Auger ON/OFF Switches Auger Motor Capacitors Refer to Service Auger MotorTime Delay Hopper Display Lights not on Circuit BreakerCompressor not running Power cord Ing procedures. SeeWith adjustment Board L.E.D.s With an extension cord. Refer toProblem Probable Cause Problem Become unusual. Auger MotorsService Component AccessLocation Test ProceduresAuger Motors Auger Motor Capacitor Auger Motor CapacitorsAuger Shaft Assembly Auger Shaft AssemblyService Auger Shaft ASSEMBLYcont Auger ON/OFF Switches Volts ac for 120 volt models Volts ac for 230 volt modelsRemove the wires from the circuit breaker Circuit BreakerDispenser chassis Two wire 230 volt models Connect the black wire from the compressorProperly discharged before proceeding Compressor Start Relay Refer to FIG120V Dispensers Refer to a and reconnect the wires Remove run capacitor and discardCompressor & Components CDS-3 Compressor Thermal P1819 Overload Protector LocationRED from Relay T2 WHI from Relay T4 BLK from Relay T-5 Disconnect the fan leads from the main wiring harnessRefer to a and reconnect the wires to the compressor Compressor Relay Terminals Contactor Electronic Control Symptoms Cooling Drum AlignmentDAY/NIGHT Switch Dispenser ON/OFF Switch Dispenser ON/OFF SwitchElectronic Control Electronic ControlUse cable ties to secure wires away from fan blades FANFuse and Fuse Holder Fuse HolderICE/OFF/NO ICE Switches ICE/OFF/NO ICE SwitchesLamp Cord Assy Lamp Cord AssyLamp Cord Connector Upper left side of the auger covers Test ProceduresLamp HOLDER/SOCKET Assembly Inside the hopper coversD./ADJUSTMENT Board E.D./ Adjustment BoardSolenoids SolenoidsTemperature Sensor Temperature SensorTorque Sensor Circuit Board Torque Sensor Circuit Board P1341 LocationTransformer Remove transformer and discardService Voltage DividerCoolant Schematic Diagram CDS-2 Coolant Schematic Diagram CDS-3 Prior to S/N CDSCDS 0019500 Up 27646 27646 Schematic Wiring Diagram for CDS-2 PAF Schematic Wiring Diagram for CDSA-2 PAF 27646 27646 27646
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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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