Bunn ULTRA-1 manual Auger Shaft Assembly

Page 25

SERVICE (cont.)

AUGER SHAFT ASSEMBLY

Auger Motor Cover

 

Run Capacitor

 

Auger Motor Assy

 

Auger Shaft Assy

 

Ceramic Coating

Hopper Drum Seal

 

Auger Shaft Bushing

Cooling Drum Seal

Cooling Drum

 

FIG. 5 AUGER SHAFT ASSEMBLY

P1758

 

Location:

The Auger Shaft Assembly is located in each of the cooling drums.

Removal and Replacement:

1.Drain, remove and clean hopper; refer to the Rec- ommended Daily Weekly Cleaning Section of this manual, for proper cleaning procedures. Discard the hopper/drum seal and faucet seal.

2.Remove the #8 locking screws securing auger motor cover to the cooling drum mount assembly; remove cover and set aside for reassembly.

3.Remove the #8 locking screw on the lower right side (viewed from front) of the auger motor mounting bracket securing the auger motor run capacitor. Set capacitor aside with wires attached.

4.Disconnect the auger motor terminal from the terminal on the main wiring harness.

5.Remove the remaining #8 locking screws securing the auger motor mounting bracket to cooling drum mounting bracket.

6.Remove motor with mounting bracket, split pin and torsion spring bearing as an assembly.

NOTE - When removing or installing motor and shaft assemblies, be sure the split pins are turned to a posi- tion that will clear the torque sensor circuit board.

7.Pull the auger shaft assembly straight out of cool- ing drum. Inspect the shaft for abnormal wear or scoring.

8.From the front of dispenser, remove the seal and blue bushing from cooling drum and discard them.

9.Clean seal and bushing surfaces of the cooling drum very thoroughly.

10.Refer to Fig 6 and slip new blue bushing into cooling drum.

Blue bushing

Do NOT get any Lube on this surface (between Drum and Bushings/Seals)

P1759

FIG. 6 AUGER SHAFT BUSHING

11.Place seal on insertion tool #28395.0000, as shown in Fig. 7. Make sure open face of seal is toward cooling drum.

12.Push seal into bore until it is firmly seated; remove tool.

13.Place a small amount of #29563.0000 “Krytox” lubricant (provided in kit in a plastic cap) on the end of the motor shaft (about 1 1/2”) and a thin film in the groove. Install auger shaft assembly onto the motor shaft. See Fig. 8. Do not use too much “Krytox” lubricant.

NOTE - This is the only place “Krytox” lubricant is used.

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41084 102709

 

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Contents Phone 217 529-6601 FAX 217 ULTRA-1 ULTRA-2BUNN-O-MATIC Commercial Product Warranty User Notices ContentsIntroduction Temp & Torque Screen Operating Controls ULTRA-1 Operating Controls ULTRA-2 Switch upper left corner of the control padOther and disconnect from Be taken when handling Hopper Recommended Daily Cleaning ULTRA-2 shownFrom the rear of the drum Under spring tension. Spread One side of the handle first, thenDrums and press the seals Recommended Daily CleaningFirmly into place as shown Auger noseSanitizing Procedure Auto-fill Cleaning Instructions With Brixing Pump InstalledMaterials required Normal Operation Preventive MaintenanceKit Contents Required Regular Maintenance Semi AnnualInstructions DescriptionRequired Regular Maintenance No Power TroubleshootingBoard Set into DAY mode Troubleshooting Chills but Won’t freezeSet into ICE mode Is display showing Done Adjust CleanYes Dirty? Check fan Have a certified Troubleshooting No cooling At allAdjust thickness Screen higher Troubleshooting Freezes, but not Thick enoughBrix ratio Too much Auger jumping Check fan Troubleshooting NoiseDrum alignment Check auger shaft bushings Auger won’t turnTorque Sensor Error TroubleshootingTorque Sensor Error Torque Sensor Shorted Torque Sensor OpenTemperature Sensor Shorted Troubleshooting Temperature Sensor ErrorTemperature Sensor Open Filter Needs Cleaning Troubleshooting Clean Filter MessagesFreezing is Disabled Monthly reminderComponent Access Panels ServiceAuger Motors SERVICEcontMotor Coil Resistance Auger Motor Capacitors Auger Motor CapacitorAuger Shaft Assembly Auger Shaft AssemblyRemove and clean condenser air filter, Fig Service Auger Shaft ASSEMBLYcontRemove the wires from the circuit breaker Test ProceduresCircuit Breaker Location120V Compressors 230V Compressors Compressor Start Relay Terminals Service Compressor Assy Compressor Embraco ULTRA-2Model T-2155 Service Compressor Embraco ULTRA-2Model T-2168 Secure compressor to the dispenser chassis using four Compressor Thermal Compressor Appliances ULTRA-1Relay Terminals Service Service Compressor Danfoss ULTRA-1B Compressor Capacitor Terminals Service Relay or Contactor on Early Models Control Board ULTRA-2 Control BoardCooling Drum Shipping Support Cooling Drum AlignmentUse cable ties to secure wires away from fan blades Front of the condenser Test ProceduresFAN ULTRA-2 FAN FAN ULTRA-1Alternate Test HOT GAS Temperature SensorLamp Cord Assy Lamp Cord WiresLamp Cord Connector Lamp Cord ConnectorLamp HOLDER/SOCKET Assembly Lamp HOLDER/SOCKET AssemblyULTRA-2 ULTRA-1 Lamp RelayRibbon Cable Membrane Switch ULTRA-2Refer to and connect the ribbon cable to the Control Board Membrane Switch ULTRA-1WHI from Main Harness SolenoidsTemperature Sensor Temperature SensorTorque Sensor Circuit Board Remove the cover and set aside for reassemblyDo not Turn on Augers Load TransformerCoolant Schematic ULTRA-1 Coolant Schematic ULTRA-2 ULTRA-1 Triacs Triac MAP for ULTRA-1TH1 & MOV4 Controls Auger Liquid AUTO-FILL Board ULTRA-2 Triacs Triac Maps for ULTRA-2TH6 & MOV6 Controls Right Auger Input and Output Chart ULTRA-1 41084 Input and Output Chart ULTRA-2 41084 41084
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ULTRA-1 specifications

The Bunn ULTRA-1 is a state-of-the-art coffee brewing system designed for commercial use, offering an unmatched combination of speed, efficiency, and flavor extraction. This single-serve coffee brewer is tailored for businesses that require high-quality coffee brews in a fast-paced environment, such as cafes, restaurants, and office kitchens.

One of the standout features of the Bunn ULTRA-1 is its ability to brew up to 14 different cup sizes, accommodating various customer preferences. This flexibility allows operators to serve everything from small espresso shots to larger coffee servings, making it a versatile addition to any beverage-serving establishment. At the heart of this brewing system is Bunn's patented brewing technology, which ensures precise water temperature and ideal brew time, optimizing the extraction process for a full-bodied flavor profile.

The ULTRA-1 is equipped with a large, easy-to-read LCD screen that provides real-time feedback, allowing users to monitor brewing progress, select cup sizes, and customize brewing parameters. This intuitive interface simplifies operation, reducing the learning curve for new staff members and enhancing overall efficiency during peak hours.

Another innovative aspect of the Bunn ULTRA-1 is its advanced thermal carafe system, which keeps brewed coffee at the optimal serving temperature without the need for a traditional warming plate. This technology helps preserve the coffee's rich flavor and aroma by preventing it from becoming bitter or stale due to prolonged exposure to heat.

The ULTRA-1 emphasizes ease of maintenance with its removable brew chamber and drip tray, allowing for quick cleaning and routine upkeep. Additionally, the brewer features a self-diagnostic system, alerting operators to any potential issues, further minimizing downtime.

From its sleek design to its robust construction, the Bunn ULTRA-1 combines aesthetics and durability, making it a reliable choice for any coffee-centric business. The compact design ensures it can fit on counters without taking up excessive space, while its stainless steel components provide longevity and resistance to wear and tear.

In conclusion, the Bunn ULTRA-1 stands out in the crowded market of commercial coffee brewers due to its advanced technology, versatility, and user-friendly features. It is designed to meet the demands of modern coffee service while ensuring that every cup brewed meets the highest standards for taste and quality.
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