SERVICE (cont.)
CONTROL THERMOSTAT (ELECTRO/MECHANICAL | ||
ONLY) |
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| L2 | 1LT |
| L3T T |
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5LT | 4LT |
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| P2231.30 |
FIG. 8 CONTROL THERMOSTAT | ||
Location:
The control thermostat is located inside the front of the brewer in the center of the component bracket.
Test Procedures:
1.Disconnect the brewer from the power source.
2.With a voltmeter, check the voltage across the blue wires on the control thermostat and the white insert on the three pole 120/208V, 120/240V ter- minal block or the red insert on two pole 240V terminal block. Connect the brewer to the power source. The indication must be:
a.) 120 volts ac for three wire 120/208 volt models and three wire 120/240 volt models.
b.) 200 to 240 volts ac for two wire 200 or 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 the brewer wiring har- ness.
4.Gently remove the capillary bulb and grommet from the tank.
5.With a voltmeter, check the voltage across the black wires of the control thermostat and the white insert on the three pole 120/208V or 120/240V terminal blocks and the red insert on two pole 200V/240V terminal blocks when the control ther- mostat is turned "ON" (fully clockwise). Connect the brewer to the power source. The indication must be:
a.) 120 volts ac for three wire 120/208 volt models and three wire 120/240 volt models.
b.) 200 to 240 volts ac for two wire 200 or 240 volt models.
Voltage must not be indicated across these termi- nals when the thermostat is turned "OFF" (fully counterclockwise).
6. Disconnect the brewer from the power source.
If voltage is present as described, reinstall the capillary tube into the tank to the line 7" above the bulb, the control thermostat is operating properly.
If voltage is not present as described, replace the thermostat.
Removal and Replacement:
1.Remove wires from the control thermostat.
2.Remove the thermostat capillary bulb by firmly pulling up on the capillary tube on top of the tank lid. This will disengage the grommet from tank lid.
3.Remove the
4.Slide the grommet to the line 7" 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 the vertical position.
NOTE - The capillary tube must be clear of any electri- cal termination and not kinked.
7.Using a
8.Refer to Fig. 9 when reconnecting the wires.
9.Adjust the control thermostat as required.
BLU to Ready Light
BLU to RED Lead from Overflow
Protection Switch
BLK to BLK Lead on Contactor Coil
BLK to Ready Light
P1098
FIG. 9 CONTROL THERMOSTAT TERMINALS
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