SERVICE (cont.)
TANK HEATER
P1855 |
FIG. 13 TANK HEATER |
Location:
The tank heater is located inside the tank and secured to the tank bottom.
Test Procedures:
1.Disconnect the brewer from the power supply.
2.With a voltmeter, check the voltage across the white or red wire from the terminal block and the black wire from the control board. Connect the brewer to the power source. The indication must be 120 volts ac for two wire 120 volt models or 240 volts ac for three wire 120/240 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.Remove the top cover or top warmer housing and front access panel as previously described.
2.Disconnect the vent hose from the top of the tank by pulling the elbow fitting from the grommet in the top of the tank lid.
3.Drain water from the tank.
4.Disconnect the water supply tube to the dispense valve from the side of the tank.
5.Disconnect the water supply tube to the solenoid valve from the bottom of the tank.
6.On brewers with faucet, disconnect the outlet water line to the faucet from the side of the tank.
7.Disconnect the temperature probe from the top of the tank by pulling the probe from the grommet in the top of the tank lid.
8.Disconnect the pink wire from the level probe.
9.Disconnect the green wire from the top of the tank.
10.Disconnect the limit thermostat from the side of the tank.
11.Disconnect the two white wires from the tank warmer blanket.
12.Disconnect the black wire and the white or red wire from the tank heater terminals.
13.Remove the four
14.Remove the eight
15.Remove the two hex nuts securing the tank heater to the bottom of the tank. Remove tank heater with gaskets and discard.
16.Install new tank heater with gaskets to the bottom of the tank and secure with two hex nuts.
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