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COMPONENT ACCESS (cont)
TANK HEATERS
Location:
The tank heaters (Fig 9) are located inside the tank,
secured to the tank lid.
Test Procedures:
1. With a voltmeter, check voltage across the white
wire (120V Models) or red wire (120/208 and
120/240V Models) and blue wire on the top of
the tank heaters. Connect brewer to the power
source. The indication must be 120 volts ac for
two wire 120 volt models, 208 volts ac for three
wire 120/208 volt models and 240 volts ac for
120/240 volt models (during a heating cycle).
2. Disconnect the brewer from the power source.
If voltage is present as described, proceed to #3.
If voltage is not present as described, refer to the
Wiring Diagrams and check wiring harness. If harness
checks ok, replace control board.
3. Disconnect the wires from the tank heater termi-
nals.
4. 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.
If resistance is not present as described, replace the
tank heater.
NOTE- If any resistance is read between sheath and
either terminal, remove and inspect heater for cracks
in the sheath.
Removal and Replacement:
1. Remove the top cover from the brewer.
2. Disconnect the wires from tank heater terminals.
3. Remove the four #8-32 nuts securing the tank
heater(s) to the tank lid assembly.
4. Remove tank heater(s) with gasket(s) and dis-
card.
5. Install new tank heater(s) with gasket(s) to the
tank lid assembly with the original nuts.
6. Reconnect the wires to the tank heater(s) termi-
nals.
FIG 9 TANK HEATERS
1800W-120V
8.05
2200W-120V
6.54
2850W-208V
15.25
3300W-240V
18.81
4000W-208V
11.0
4000W-240V
14.47
5000W-240V
11.65
TERMINAL TO SHEATH - INFINITE (OPEN)
HEATER RESISTANCE
Tank Heaters
41746 112008