Bunn twf-ez Coffeemaker User Manual


 
Page 17
P1960.60
FIG. 4 ICED TEA BREW SOLENOID VALVE
Location:
Viewing the brewer from the rear the iced tea brew
solenoid valve is mounted in the center of the mount-
ing bracket.
Test Procedures:
1. Disconnect the brewer from the power source.
2. Disconnect the white/blue and white wires from
the iced tea brew and dilution solenoid valves. With
the TEA/OFF/COFFEE switch in the "TEA" position
press the start switch.
3. With a voltmeter, check the voltage across the
white/blue and white wires. Connect the brewer
to the power source. The indication must be 120
volts ac.
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
Wir-
ing Diagram
and check brewer wiring harness.
5. Check for continuity across the iced tea brew so-
lenoid valve coil terminals.
If continuity is present as described, reconnect the
white/blue and white wires to the solenoid.
If continuity is not present as described, replace the
solenoid valve.
6. Check the iced tea solenoid valve for coil action.
Connect the brewer to the power source. With TEA/
OFF/COFFEE switch in the "TEA" position press
the start switch and listen carefully in the vicinity
of the solenoid valve for a "clicking" sound as the
coil magnet attracts.
7. Disconnect the brewer from the power source.
If the sound is heard as described and water will not
pass through the solenoid valve, there may be a block-
age in the water line before the solenoid valve or, the
solenoid valve may require inspection for wear, and
removal of waterborne particles.
If the sound is not heard as described, replace the
solenoid valve.
Removal and Replacement:
1. Remove all wires from solenoid valves.
2. Turn off the water supply to the brewer.
3. Disconnect the water lines to and from the sole-
noid valves.
4. Remove the two #8-32 keps nuts holding the
mounting bracket to the brewer base.
5. Lift out the bracket.
6. Remove the two #10-32 slotted-head screws hold-
ing the iced tea brew solenoid valve to the mount-
ing bracket.
7. Securely install the new iced tea brew solenoid
valve to the mounting bracket.
8. Attach the mounting bracket to the brewer base.
9. Securely fasten the water lines to and from the
solenoid valves.
10. Refer to Fig. 5 when reconnecting the wires.
SERVICE (cont.)
BREW SOLENOID VALVE (ICED TEA)
FIG.5 SOLENOID VALVE TERMINALS
P1364
WHI to Main
Harness
WHI/RED
to Switch
WHI/BLU
to Switch
29466 082200
HOT COFFEE
BREW SOLENOID
ICED TEA BREW
SOLENOID
DILUTION
SOLENOID