Bunn BrewWise DBC Service Manual page 23

COMPONENT ACCESS (cont)
REFILL VALVE (cont)
FIG 8 REFILL VALVE
(DUAL GPR DBC Models)
Location:
DUAL SH DBC models:
SINGLE TF DBC late models:
DUAL TF DBC late models:
The refill valve is located inside the front of the
brewer behind the front access panel.
SINGLE SH DBC models:
SINGLE GPR DBC models:
SINGLE TF DBC early models:
DUAL GPR DBC models:
DUAL TF DBC early models:
The refill valve is located inside the hood of the
brewer under the top cover.
Test Procedures:
1. Enter programming level 2, scroll to "Service Tools"
then scroll to "Refill Valve".
2. Briefly activate the refill valve in the test mode.
With a voltmeter, check the voltage across the coil
wires.
3. The indication must be 120 volts ac for two wire
120 volt models, three wire 120/208, and 120/240
volt models or 230 volts ac for two wire 230 volt
models.
If voltage is present, proceed to # 4.
If voltage is not present, refer to Wiring Diagrams
and check main wiring harness. If harness checks ok,
replace control board.
4. Check the refill valve for coil action. Briefly activate
the refill valve in the test mode and listen carefully
near the refill valve for a"clicking" sound as the
magnetic coil pulls the plunger in.
If the sound is heard as described and water will not
pass through the refill valve, there may be a blockage
in the water line before the refill valve or, the solenoid
valve may require inspection for wear, and removal of
waterborne particles.
If the sound is not heard as described, proceed to
# 5.
5. Disconnect the brewer from the power source.
6. Check for continuity across the refill valve coil
terminals.
If continuity is not present as described, replace
the refill valve.
If continuity is present as described, there could
be some debris in the valve.
Removal and Replacement:
1. Shut off the water supply.
2. Remove both wires from the refill valve.
3. Disconnect both water lines at the valve.
4. Remove the two 1/4"-20 screws securing the valve
to the component mounting bracket.
5. Using the two 1/4"-20 screws, install the new valve
to the component mounting bracket.
6. Securely fasten the water lines to the valve.
7. Refer to wiring diagrams when reconnecting the
wires.
8. Install access panels and covers and refer to Initial
Set-up for refill and operation.
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