SERVICE (cont.)
CONTROL THERMOSTAT
FIG. 6 CONTROL THERMOSTAT | P2209.60 |
|
Location:
The control thermostat is mounted on the right front of the component bracket.
Test Procedures:
1.Disconnect the brewer from the power source.
2.Locate the thermostat and the voltage check points.
3.Connect the brewer to the power source.
Model | Check Voltage Across | Voltage |
120/208V & 120 | Black wire on thermostat | 120V |
240V - 3 wire w/ | from main harness to white |
|
ground single phase | wire in terminal block. |
|
not be present when the thermostat is in the "OFF" position (fully counterclockwise).
If continuity is present as described, the control ther- mostat is operating properly.
If continuity is not present as described, replace the control thermostat.
Removal and Replacement:
1. | Disconnect the wires from the control thermo- |
| stat. |
2. | Remove the thermostat capillary bulb by firmly |
| pulling up on the capillary at the component |
| bracket. This will disengage the grommet from |
| the component bracket. |
3. | Remove the |
| thermostat and mounting bracket to the component |
| bracket. Remove control thermostat and bracket |
| as an assembly. |
4. | Remove knob from control thermostat. |
5. | Remove the two |
| thermostat to the thermostat mounting bracket. |
| Remove and discard thermostat. |
6. | Install new control thermostat on thermostat |
| mounting bracket and secure with two |
| screw. |
7. | Install knob on thermostat. |
8. | Install thermostat and mounting bracket on the |
| component bracket and secure with one |
230V - 2 wire w/ ground single phase
208V or 240V - 2 wire w/ground single phase
280V or 440V - 4 wire w/ground 3 phase
380V - 3 wire w/ ground 3 phase w/ stepdown
transformer
Red wire on thermostat | 230V |
from main harness to black |
|
wire in terminal block. |
|
Black wire on thermostat | 208V or |
from main harness to red | 240V |
wire in the terminal block. |
|
Black wire on thermostat | 220V or |
from main harness to white | 254V |
wire in terminal block. |
|
Black wire on thermostat | 120V |
from main harness to white |
|
wire on step down trans- |
|
former. |
|
screw. |
9. Carefully bend the capillary tube so that the tube |
and bulb inside the brewer are in the vertical posi- |
tion. |
NOTE: The capillary tube must be clear of any electrical termination and not kinked.
10.Refer to Fig. 7 and reconnect the wires.
11.Adjust the control thermostat as required.
BLK from Main Har- ness (All Models Ex- cept 230V CE Models RED from Main Harness (230V CE Models)
4.Disconnect the brewer from the power source. If voltage is present as described, proceed to #5.
If voltage is not present as described, refer to theWiring Diagrams and check the brewer wiring harness.
5.Disconnect the black wires from the control ther- mostat.
6.Check for continuity across the terminals on the control thermostat with the control thermostat in the "ON" position (fully clockwise), continuity must
BLK to Limit Thermostat (All Models Except 230V CE Models
RED to Limit Thermostat (230V CE Models)
P1730.80
FIG. 7 CONTROL THERMOSTAT TERMINALS
Page 17 | 10060 | 080900 |
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