Bunn CDS-3 service manual Solenoids

Page 46

SERVICE (cont.)

7. Disconnect the dispenser from the power source.

SOLENOIDS

 

FIG. 44 SOLENOIDS

P1342

 

Location:

The solenoids are mounted on a bracket that is attached on top of the chassis on the left side.

Test Procedures:

1.Disconnect the dispenser from the power source.

2.Disconnect the white/black wire from the solenoid to be tested and the orange wire from the left sole- noid, the violet wire from the right solenoid or the white/violet wire from the center solenoid.

3.With a voltmeter, check the voltage across the white/black wire and the other wire with the ON/OFF switch in the “ON” position and the appropriate ICE/OFF/NO-ICE switch in the “ICE” or “NO-ICE” position. 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 models.

4.Disconnect the dispenser from the power source. If voltage is present as described, proceed to #5

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

5.Check for continuity across the solenoid valve coil terminals.

If continuity is present as described, reconnect the wires to the solenoid.

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

6.Check the solenoid valve for coil action. Connect the dispenser to the power source. With the auger motor switch in the “ON” position and the ON/ OFF/ICE switch in the “ICE” or “NO-ICE” position press the ON/OFF switch to the “ON” position. After approximately two minutes listen carefully in the vicinity of the solenoid valve for a “clicking” sound as the coil magnet attracts.

If the sound is heard as described and the refrigerant will not pass through the solenoid valve, there may be a blockage in the refrigerant line before the solenoid valve, or the solenoid valve may require inspection for wear, and removal of particles.

If the sound is not heard as described, replace the solenoids.

Removal and Replacement:

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

1.Disconnect the wires from both solenoids.

2.Disconnect the refrigerant lines from the solenoids to the cooling drums and the refrigerant line from the accumulator.

3.Remove the #6 hex crimptite securing solenoid bracket to the dispenser chassis.

4.Remove bracket and solenoids from the chassis assembly.

5.Remove the four #8-32 locking screws securing the solenoids to the bracket.

6.Remove solenoid and repair or discard.

7.Install new solenoid on mounting bracket using four #8-32 locking screws.

8.Reinstall mounting bracket and solenoids inside the dispenser chassis, securing with a #6 hex crimptite screw.

9.Reconnect the tubes from the accumulator and the cooling drums.

10.Refer to Fig. 45 and reconnect the wires.

11.Evacuate the system.

12.Recharge the system with the appropriate coolant and to the pressures directed on the decals

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

 

FIG.45 SOLENOID TERMINALS

P1327

 

 

46

 

27646 122200

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Contents CDS-2 CDS-3 Post Office BOX SPRINGFIELD, IllinoisContents Introduction12559.0003 00986.0002 User Notices28720.0000 27443.0000 27664.0000 User NoticesCDSA-2 Only Site preparation Electrical RequirementsAs shown Initial setupHand Each cooling drum seal Place Inside of each auger shaftApproximately Operating Controls Setting Night Time Mode DAY/NIGHT TimerSetting Time 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 LubricationLubrication DisassemblyAssembly Faucet HandlesAuger assembly & Disassembly Early Augers only Snap it onto the assemblyTroubleshooting Problem Probable Cause RemedyTime Delay Auger Motor won’t turn Auger ON/OFF SwitchesAuger Motor Capacitors Refer to Service Auger Motor Hopper Display Lights not on Circuit BreakerWith adjustment Board L.E.D.s Compressor not running Power cordIng procedures. See With an extension cord. Refer toProblem Probable Cause Problem Become unusual. Auger MotorsService Component AccessAuger Motors Test ProceduresLocation 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 BreakerProperly discharged before proceeding Dispenser chassis Two wire 230 volt modelsConnect the black wire from the compressor 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 LocationRefer to a and reconnect the wires to the compressor Disconnect the fan leads from the main wiring harnessRED from Relay T2 WHI from Relay T4 BLK from Relay T-5 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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