Bunn SRU Guia Do Utilizador
Page 17
SERVICE (cont.)
CONTROL THERMOSTAT
FIG. 6 CONTROL THERMOSTAT
P113.40
Location:
The control thermostat is mounted on the left front
of the top component bracket.
Test Procedures:
1. Disconnect the brewer from the power source.
. Locate the thermostat and the voltage check
points.
Model
10/08V &
10/40V - 3-
wire w/ground
single phase
30V - -wire
w/ground single
phase
08V or 40V -
-wire w/ground
single phase
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 the wiring
diagrams and check the brewer wiring harness.
5. Disconnect the black or red wires from the control
thermostat.
6. Check for continuity across the terminals on the
control thermostat with the control thermostat in
the "ON" position (fully clockwise), continuity must
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.
. Remove the thermostat capillary bulb by firmly pull-
ing up on the capillary at the component bracket. This
will disengage the grommet from the component
bracket.
3. Remove the #8-3 screw securing the control
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 #6-3 screws securing the control
thermostat to the thermostat mounting bracket.
Remove and discard thermostat.
6. Install new control thermostat on thermostat mount-
ing bracket and secure with two #6-3 screw.
7. Install knob on thermostat.
8. Install thermostat and mounting bracket on the
component bracket and secure with one #8-3
screw.
9. Carefully bend the capillary tube so that the tube and
bulb inside the brewer are in the vertical position.
The tube should extend an additional 5.5", above
the bulb into the brewer.
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.
Check Voltage Across
Black wire on therostat
from main
harness to white wire
in terminal block.
Red wire on thermo-
stat from main
harness to black wire
in terminal block.
Black wire on thermo-
stat from main
harness to red wire in
the terminal block.
Voltage
10V
30V
08V or
40V
10067 040100
P1730
FIG. 7 CONTROL THERMOSTAT TERMINALS
BLK from Main Har-
ness (All Models Ex-
cept 30V CE Models
RED from Main
Harness (30V CE
Models)
BLK to Limit Thermostat
(All Models Except 30V CE
Models
RED to Limit Thermostat
(30V CE Models)