SERVICE (cont.)
CONTROL THERMOSTAT
P2213.60 |
FIG. 14 CONTROL THERMOSTAT |
Location:
The control thermostat is located inside hood on the right side just behind the iced tea brew timer.
Test Procedures:
1.Disconnect the brewer from the power source.
2.With a voltmeter, check the voltage across the blue wire on the control thermostat and the white wire on the tank heater for 120 volt two wire models or red wire on the tank heater for 120/208 volt three wire models. Connect the brewer to the power source. The indication must be:
a)120 volts ac for two wire 120 volt models.
b)208 volts ac for three wire 120/208 volt mod- els.
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.Locate the black wire on the control thermostat.
5.Gently remove the capillary bulb and grommet from the tank.
6.With a voltmeter, check the voltage across the black wire of the control thermostat and the white wire on the tank heater for 120 volt two wire mod- els or red wire on the tank heater for 120/208 volt three wire models when the control thermostat is turned fully clockwise. Connect the brewer to the power source. The indication must be:
a) 120 volts ac for two wire 120 volt models.
b) 208 volts ac for three wire 120/208 volt mod- els
8.Disconnect the brewer from the power source.
If voltage is present as described, reinstall the capil- lary tube into the tank to the line 4.5" above the bulb, the control thermostat is operating properly.
If voltage is not present as described, replace the ther- mostat.
Removal and Replacement:
1.Remove both wires from the control thermostat terminals.
2.Remove the thermostat capillary bulb by firmly pulling up on the capillary tube at the tank lid. This will disengage the grommet from the tank lid.
3.Remove the
4.Slide the grommet to the line 4.5" above the bulb on the new capillary tube.
5.Insert the capillary bulb through the hole in the tank lid and press the grommet firmly and evenly so that the groove in the grommet fits into the tank lid.
6.Carefully bend the capillary tube so that the tube and bulb inside the tank are in a vertical position.
NOTE – The capillary tube must be clear of any elec- trical termination and not kinked.
7.Fasten the new control thermostat to its bracket.
8.Refer to Fig. 15 when reconnecting the wires.
9.Adjust the control thermostat as required.
I |
|
H | OFF |
HI | OFF |
NNUB | |
BUNN | |
BLK to Tank Heater or
Thermal Fuse on Models
W/Faucet
BLU to Limit Thermostat
P1390
FIG. 15 CONTROL THERMOSTAT TERMINALS
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