Bunn SRUA Control Thermostat, Disconnect the red wires from the control thermo- stat

Page 15

SERVICE (cont.)

CONTROL THERMOSTAT

P2180

FIG. 4 CONTROL THERMOSTAT

Location:

The control thermostat is mounted on the left front of the top component bracket.

Test Procedures:

1.Disconnect the brewer from the power source.

2.Locate the thermostat and check for 230 volts ac between the red wire from the limit thermostat to the control thermostat and the black wire on the main terminal block.

3.Disconnect the brewer from the power source.

If voltage is present as described, proceed to #4.

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

4.Disconnect the red wires from the control thermo- stat.

5.Check for continuity across the terminals on the control thermostat with the control thermostat in the "ON" position (fully clockwise), continuity must not be present when the thermostat is in the "OFF" position (fully counterclockwise).

If continuity is present as described, the control ther- mostat is operating properly.

If continuity is not present as described, replace the control thermostat.

Removal and Replacement:

1.Disconnect the wires from the control thermostat.

2.Remove the thermostat capillary bulb by firmly pulling up on the capillary at the component bracket. This will disengage the grommet from the compo- nent bracket.

3.Remove the #8-32 screw securing the control thermostat and mounting bracket to the compo- nent bracket. Remove control thermostat and bracket as an assembly.

4.Remove knob from control thermostat.

5.Remove the two #6-32 screws securing the con- trol thermostat to the thermostat mounting bracket. Remove and discard thermostat.

6.Install new control thermostat on thermostat mounting bracket and secure with two #6-32 screws.

7.Install knob on thermostat.

8.Install thermostat and mounting bracket on the component bracket and secure with one #8-32 screw.

9.Carefully bend the capillary tube so that the tube and bulb inside the brewer are in the vertical

position with the grommet located 5 1/2" above the capillary bulb.

NOTE: The capillary tube must be clear of any electrical termination and not kinked.

10.Refer to Fig. 5 and reconnect the wires.

11.Adjust the control thermostat as required.

RED from Main

Harness

RED to Limit Thermostat

P1730

FIG. 5 CONTROL THERMOSTAT TERMINALS

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10067.3 070102

 

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Contents Post Office BOX SPRINGFIELD, Illinois Bunn SruaIntroduction BUNN-O-MATIC Commercial Product WarrantyUser Notices Electrical Installation Instructions Electrical RequirementsPlumbing Requirements Plumbing Hook-up Initial SetupAdjusting Brew Volumes Cleaning Coffee BrewingFilter Holder Troubleshooting Problem Probable CauseRemedy Problem Brew cycle will not start Tank not fillingDirection of flow arrow must be pointing towards brewer Problem Probable Cause Remedy Structed Refer to Service Solenoid Valve for testing procedures. SeePump tubing Funnel overflows FiltersCoffee reservoir overflows Brewer is making unusal noises Remove and clean lime off the tank heater. SeeComponent Access ServiceThermostat ContactorLocation BLK Thermal Block L1 Fuse to Tank Heater RED Thermal FuseControl Thermostat Disconnect the red wires from the control thermo- statFuse and Fuse Holder Fuse and Fuse HolderLimit Thermostat Limit ThermostatLiquid Level Board Liquid Level Board and Level ProbeService Liquid Level Board and Level Probe ON/OFF Switch Disconnect all wires on the ON/OFF switchRED to Start Switch, Brew Pump Assembly Pump AssemblySelector Switch Half Batch Selector Switch Half Batch OptionSolenoid SolenoidLocation Start Switch BrewSwing ARM Switch Swing ARM SwitchTank Heater Tank HeaterThermal Fuses Thermal FusesTimer If voltage is as described, proceed to #7 Service Digital Brew Timer Late ModelsDigital Timer Terminals 10491.0004A 07/02 2002 BUNN-O-MATIC Corporation

SRUA specifications

The Bunn SRUA is an innovative coffee brewer that is designed to meet the needs of commercial environments, like restaurants, cafes, and office breakrooms. This machine is known for its efficiency, reliability, and exceptional brewing quality. The SRUA model is particularly popular for its ability to produce consistently great-tasting coffee with minimal effort.

One of the standout features of the Bunn SRUA is its unique brewing technology. The machine is equipped with a patented brewing system that allows for precise control over temperature and brewing time. This ensures that the coffee is brewed at the optimal temperature, extracting the maximum flavor from the coffee grounds. The SRUA also features a hot water faucet that provides instant hot water for tea or other beverages, enhancing versatility in beverage options.

The Bunn SRUA has a large capacity, able to brew multiple pots of coffee quickly. It can produce up to 3.8 gallons of coffee per hour, making it ideal for high-demand settings. The brewer has a built-in water tank that maintains the right temperature at all times, reducing wait times and allowing for quick service during busy hours.

In terms of design, the SRUA is built to withstand the rigors of daily use in commercial settings. It features high-quality stainless steel construction, ensuring durability and longevity. Additionally, the machine is relatively compact, allowing it to fit on countertops with limited space while still providing high-volume output. The user-friendly interface and clear indicator lights make operating the machine straightforward, even for staff with minimal training.

Moreover, the Bunn SRUA emphasizes easy maintenance. The machine comes with a removable brew basket and a stainless steel funnel that simplify cleaning and prevent residue buildup. Regular maintenance is streamlined, helping to keep the brewer functioning at peak performance.

Security features are also integrated into the Bunn SRUA, with options for water line connection and manual fill capabilities, allowing users to choose the most convenient setup for their needs.

In summary, the Bunn SRUA is a powerful, efficient, and durable commercial coffee brewing solution that delivers exceptional performance and versatility, making it an excellent choice for businesses that prioritize quality and service.
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