Bunn CRTF5, CRT5 service manual Tank Heater, Thermostat w/bracket early models only

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SERVICE (cont.)

TANK HEATER

P2186.45

FIG. 12 TANK HEATER

Location:

The tank heater is located inside the tank and secured to the tank lid.

Test Procedures:

1.Disconnect the brewer from the power supply.

2.Check the voltage across the black and white wires on 120 volt models or the black and red wires for 120/240 volt models, 200 volt models and 240 volt models with a voltmeter. Connect the brew to the power source. The indication must be:

a)120 volts ac for two wire 120 volt 20 amp models .

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

c)200 to 240 volts ac for two wire 200 or 240 volt models.

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 Diagrams and check wiring harness.

4. Disconnect the black wire and the white wire or red

wire from the tank heater terminals.

5.Check for continuity across the tank heater termi- nals.

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

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

NOTE- If the tank heater remains unable to heat, remove and inspect heater for cracks in the sheath.

Removal and Replacement:

1.Disconnect the water supply tube from the fill basin.

2.Remove the tank inlet fitting securing the fill basin to the tank lid, remove fill basin and tank inlet gasket. Set all three parts aside for reassembly.

3.On brewers with faucet shut-off water supply to the brewer and disconnect the inlet and outlet water lines to the faucet coil assembly.

4.Disconnect the black wire on the limit thermostat from the tank heater switch. On late model brew- ers also disconnect the blue wire from the limit thermostat to the control thermostat.

5.Disconnect the black wire and the white or red wire from the tank heater terminals.

6.Remove sprayhead and the hex nut securing the sprayhead tube to the hood. Set aside for reas- sembly.

7.Remove the eight #8-32 nuts securing the tank lid to the tank.

8.Remove the tank lid with limit thermostat, spray- head tube, tank heater, coil assembly and control

thermostat w/bracket (early models only).

9Remove the two hex nuts securing the tank heater to the tank lid. Remove tank heater with gaskets

and discard.

10.Install new tank heater with gaskets on the tank lid and secure with two hex nuts.

11.Install tank lid with limit thermostat, sprayhead tube, tank heater, coil assembly (brewers with faucet) and control thermostat with bracket (early brewers only) using eight #8-32 hex nut.

12.Reconnect the inlet and outlet water lines to the faucet coil assembly.

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Contents Bunn CRT5 Warranty IntroductionUser Notices Electrical Hook-Up Electrical RequirementsPlumbing Requirements Plumbing Requirements Models CRT5, CRT5A & CRT5BModels CRTF5 & CRTF5B Models CRTF5, CRTF5A & CRTF5BAdjusting Brew Volumes Initial SET-UPCleaning ON/OFF SwitchStart Switch Operating ControlsTroubleshooting Problem Probable CauseBrew cycle will not start No water To the brewerTroubleshooting ProblemBrew cycle will not start Water is not hot Control Thermostat Tank HeaterSyphon System Inconsistent beverage levelDispenser Spitting or excessive steaming Dripping from sprayhead Plumbing Lines Water Supply Dry coffee grounds remainFunnel Brewer is making unusal noises Tank Heater Warmer SeeService Component AccessContents 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-OFFDisconnect the black and white wires from the solenoid Service Timer Early ModelsTest Procedure Disconnect the brewer from the power source Service Timer Timer TerminalsService Digital Brew Timer Late Models If voltage is as described, proceed to #8Setting brew volumes. To set a brew volume Service Digital Brew Timer Late ModelscontTo increase a brew volume, place the ON/OFF 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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