Bunn TB6Q 用户手册

Page 13

 

The tank heater is located inside the tank and 

secured to the tank lid.

1.  Disconnect the brewer from the power supply.

2.  Turn on thermostat. Check the voltage across the 

black and white wires on 120 volt models or the 

black and red wires for 200 volt models and 230 

volt models with a voltmeter. Connect the brewer 

to the power source. The indication must be:

 

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

models .

 

b) 200 to 230 volts ac for two wire 200 or 230 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 Wir-

ing Diagrams and check wiring harness.

4.   Disconnect the wires from the tank heater termi-

nals.

5.   Check resistance value across tank heater terminals 

and compare to chart.

If resistance is present as described, reconnect the 

wires, the tank heater is ok.

FIG. 13-1 TANK HEATER

1680W-120V  

         7.9   -  9.2 

1680W-100V  

         5.5   -6.4 

1680W-230V  

       29.0   -33.7 

TERMINAL TO SHEATH - INFINITE (OPEN)

      HEATER                   RESISTANCE

If resistance is not present as described, replace the 

tank heater.

 If any resistance is read between sheath and 

either  terminal,  remove  and  inspect  heater  for 

cracks in the sheath.

1.  Disconnect the brewer from the power supply.

2.  Disconnect the water supply from the brewer.

3.  Disconnect the wires from the limit thermostat.

4.   Disconnect the wires from the tank heater termi-

nals.

5.  Remove sprayhead and the  hex nut securing the 

sprayhead tube to the hood. Set aside for reas-

sembly.

6.  Remove the six #10 screws securing the tank lid 

to the tank.

7.   Remove the tank lid with limit thermostat, spray-

head tube and tank heater.

8  Remove the two hex nuts securing the tank heater 

to the tank lid. Remove tank heater with gaskets 

and discard.

9.  Install new tank heater with gaskets on the tank 

lid and secure with two hex nuts.

10. Install tank lid with limit thermostat, sprayhead 

tube and tank heater using six #10 screws.

11. Secure  sprayhead  tube  to  hood  using  hex  nut 

removed in step 4.

12. Install sprayhead.

15. Reconnect the wires to the limit thermostat and 

tank heater.

16. Reconnect the water and power supply.

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