Bunn CRTF5, CRT5 service manual Tank Heater Switch

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SERVICE (cont.)

TANK HEATER SWITCH

FIG 14 TANK HEATER SWITCH

P2186.45

 

Location:

The tank heater switch is located on the rear of the brewer on the upper left side of the trunk.

Test Procedure:

1.Disconnect the brewer from the power source.

2.Disconnect the black wire from the limit thermo- stat.

3.With the tank heater switch in the "ON" positionand with a voltmeter, check the voltage between the black wire removed from the limit thermostat and the white wire or red wire on the tank heater. Connect the brewer to the power source. The indication must be:

a)120 volts ac on two wire 120 volt models.

b)240 volts ac on three wire 120/240 volt models.

c)200 to 240 volts ac on 200 volt or 240 volt models.

4.Disconnect the brewer from the power source.

If voltage is present as described, proceed to #5.

If voltage is not present as described, refer to the Wiring Diagrams and check the brewer wiring har- ness.

5.With the tank heater switch in the "ON" upper position, check for continuity between the black wire removed from the limit thermostat and the black insert on the terminal block. Continuity should not be present in the "OFF" lower position.

If continuity is present as described, the tank heater switch is operating properly.

If continuity is not present as described, replace the tank heater switch.

Removal and Replacement:

1.Shut off and disconnect the incoming water sup- ply to the brewer.

2.On automatic brewers gently remove the fill tube from back of fill basin.

3.Remove the tank inlet fitting securing fill basin the tank lid. Remove fill basin and gasket. Set all three parts aside for reassembly.

4.On brewers with faucets, disconnect the water supply to coil assembly and remove the tube from the tank to the faucet.

5.Remove sprayhead and hex nut securing spray- head tube to the hood. Set aside for reassembly.

6.Disconnect the wires on the limit thermostat and the tank heater and the control thermostat (early models).

7.Gently pull the thermostat sensor and grommet from the tank lid.

8.Insert a tube to the bottom of the tank and syphon ALL of the water out. BUNN-O-MATIC has #12440.0000 syphon assembly available for this purpose.

9.Remove the two #8-32 screws securing the tank assembly to the hood.

10.Lift tank and components out as an assembly and set aside for reassembly.

11.Disconnect the two black wires from the tank heater switch.

12.Remove the plastic facenut, hex facenut and the switch indicator/guard bracket that secures tank heater switch to the rear of the brewer. Remove switch and discard.

13.Insert new tank heater switch through the hole in the upper left rear of the trunk and secure with switch indicator/guard bracket, hex facenut and plastic facenut.

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10478 061500

 

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Contents Bunn CRT5 Warranty IntroductionUser Notices Plumbing Requirements Electrical RequirementsElectrical Hook-Up Models CRTF5 & CRTF5B Plumbing RequirementsModels CRT5, CRT5A & CRT5B Models CRTF5, CRTF5A & CRTF5BAdjusting Brew Volumes Initial SET-UPStart Switch CleaningON/OFF Switch Operating ControlsBrew cycle will not start No water TroubleshootingProblem Probable Cause To the brewerBrew cycle will not start Water is not hot TroubleshootingProblem Control Thermostat Tank HeaterDispenser Inconsistent beverage levelSyphon System Spitting or excessive steaming Dripping from sprayhead Funnel Brewer is making unusal noises Dry coffee grounds remainPlumbing Lines Water Supply Tank Heater Warmer SeeContents ServiceComponent Access Control ThermostatService Control Thermostat First Type Thermostat Second Type ThermostatService Limit ThermostatON/OFF Warmer Switch Lower Center WarmerTest Procedures Disconnect the brewer from the power source Solenoid ValveStart Switch Tank Heater Thermostat w/bracket early models onlyService Tank Heater Tank Heater TerminalsTank Heater Switch Tank Heater SwitchService Tank Heater Switch Tank Heater Switch TerminalsService Thermal CUT-OFF Brewers W/Faucet Thermal CUT-OFFTest Procedure Disconnect the brewer from the power source Service Timer Early ModelsDisconnect the black and white wires from the solenoid Service Timer Timer TerminalsService Digital Brew Timer Late Models If voltage is as described, proceed to #8To increase a brew volume, place the ON/OFF Service Digital Brew Timer Late ModelscontSetting brew volumes. To set a brew volume Warmer Elements Warmer Elements10478 10478 10478

CRT5, CRTF5 specifications

The Bunn CRTF5 and CRT5 coffee brewers are appreciated by coffee enthusiasts and professionals alike for their reliability, efficiency, and innovative features. These commercial brewing systems are designed to deliver high-quality coffee consistently, making them ideal for cafes, restaurants, and other food service operations.

One of the standout features of the Bunn CRTF5 is its ability to brew multiple batches of coffee simultaneously. With a capacity of brewing up to 3.8 gallons per hour, it is equipped to handle high demand without compromising on quality. The unit has a programmable digital control which allows users to easily adjust brew temperature and time, ensuring each batch is brewed to perfection. This level of control empowers operators to customize their brewing process according to the unique preferences of their customers.

In terms of design, the Bunn CRTF5 and CRT5 models incorporate a stainless-steel exterior that not only enhances durability but also adds a sleek look to any kitchen or coffee shop environment. The large, easy-to-read water level indicator allows for straightforward monitoring of the brewing process, minimizing the risk of running out of water during peak busy hours. The easy-to-use front-access design also simplifies the loading and unloading of coffee grounds and water.

Technologically, the Bunn CRTF5 and CRT5 incorporate advanced brewing technology that helps maintain optimal brew temperatures through the use of stainless-steel water tanks. These tanks ensure that water is heated quickly and is maintained at consistent temperatures throughout the brewing process, positively affecting flavor extraction and ensuring the rich taste of coffee.

Another crucial characteristic of these brewers is the brew basket, which is designed for efficient flow control. This feature assists in achieving an even extraction process, thereby enhancing the overall quality of the coffee produced. Furthermore, the sturdy construction of the basket ensures that it can withstand the demands of daily use in a high-traffic environment.

In conclusion, the Bunn CRTF5 and CRT5 coffee brewers stand out in the commercial coffee brewing market. Their combination of robust features, advanced technologies, and user-friendly design makes them a smart choice for those looking to serve high-quality coffee quickly and efficiently. Whether in a bustling café or a restaurant, these brewers are built to deliver exceptional coffee experiences every time.
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