SERVICE (cont.)
Limit Thermostat
Location:
The limit thermostat is located on the tank lid.
To test the limit thermostat, access will also be needed to the terminal block located at the rear of the dispenser.
P1772 |
FIG. 6 LIMIT THERMOSTAT |
Test Procedure:
1.Disconnect the dispenser from the power source.
2.There are two black wires on the limit thermostat terminals. One comes from the terminal block. The other goes directly to the tank heater terminal. Remove the black wire at the limit thermostat com- ing from the terminal block.
3.Check the voltage across the black wire removed from the limit thermostat and the white wire or red wire of the terminal block with a voltmeter. Con- nect the dispenser to the power source. The indi- cation must be:
a.) 100 to 120 volts ac for 100 to 120 volt models or
b.) 200 to 240 volts ac for 200 to 240 volt models.
4.Disconnect the dispenser from the power source.
If voltage was present as described, reconnect the black wire and proceed to #5.
If voltage was not present as described, refer to the Wiring Diagrams and check the dispenser wiring har- ness.
5.Check for continuity across the terminals of the limit thermostat.
If continuity is not present as described, the circuit is broken. Press the reset button of the limit thermostat and recheck for continuity.
If continuity is not present as described, replace the limit thermostat.
Removal and Replacement:
1.Remove both wires from the limit thermostat ter- minals.
2.Remove the two
3.Install the new limit thermostat and secure into place with two
4.Refer to FIG. 7 when reconnecting the wires.
BLK to Terminal Block | Reset |
BLK to Tank Heater |
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| P1776 |
FIG. 7 LIMIT THERMOSTAT WIRING |
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16 | 10420 011599 |
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