Bunn cdbcf 15 User Guide

Page 22

 

The  blanket warmer is wrapped around the tank 

assembly.

Operation:
 

The blanket warmer provides a low consistent heat 

around the tank at the point of the temperature sensor. 
This additional heat aids the heater circuit by reducing 
the number of on/off cycles, thereby extending the life 
of the relay contacts and the heater.

Test Procedures:
1.  Disconnect the brewer from the power source.
2.  With a voltmeter, check voltage across the two 

wires at the warmer element with the "ON/OFF" 
switch in the "ON" position. Connect the brewer 
to the power source. The indication must be 120 
volts ac for two wire 120 volt models and three 
wire 120/208 and 120/240 volt models, or 230 
volts ac for two wire 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 Wiring 
Diagrams and check wiring harness.

4.  Check the resistance across the two terminals on 

the blanket warmer. Refer to chart below.

If resistance is to specifi cation, reconnect the two 
wires to the blanket warmer.
If resistance is not to specifi cation, replace the blanket 
warmer.

1.   Disconnect the blanket warmer wire from the pig-

gyback terminal on the refi ll valve.

2.  Remove the tank assembly from the brewer.
3.  Peel old blanket warmer off tank.
4.  Install new blanket warmer on tank with bottom 

of blanket 1½˝ from bottom of tank.

5.  Connect one of the white wires to the piggyback 

terminal on the limit thermostat.

6.  Reinstall tank assembly.
7.  Connect the other white wire to the piggyback 

terminal on the refi ll valve. 

    50W-120V   

 

288.0 

    50W-220V   

 

968.0 

      WARMER                   RESISTANCE

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