Bunn dual sh dbc Service Manual download pdf (Page 29)

Page 29

SERVICE (cont.)

Location:

The solenoid valve is located inside the lower right

front of the brewer.

Test Procedure:

1. Disconnect the brewer from the power source and

draw 1/4 gallon of water from faucet.

2. Remove both wires from the solenoid valve coil

terminals.

3. With a voltmeter check the voltage across the

white/blue wire and white wire. Connect the brewer

to the power source. The indication must be 120

volts ac for 120/208V and 120/240V three wire

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 the

wiring diagrams and check brewer wiring harness.

5. Check for continuity across the solenoid valve coil

terminals.

If continuity is present as described, reconnect the

white and white/blue wires.

If continuity is not present as described, replace the

solenoid valve.

P2232

FIG. 29 REFILL SOLENOID VALVE

6. Check the solenoid valve for coil action. Connect

the brewer to the power source. Listen carefully in

the vicinity of the solenoid valve for a "clicking"

sound after approximately 1 second, 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

blockage in the water line before or after 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 the solenoid valve coil.

2. Turn off the water supply to the brewer.

3. Disconnect the water lines to and from the sole-

noid valve.

4. Remove the two #8-32 slotted head screws hold-

ing the solenoid valve and mounting bracket to the

brewer trunk.

5. Lift-out the solenoid valve.

6. Remove the two #10-32 slotted head screws hold-

ing the solenoid valve to the mounting bracket.

7. Securely install the new solenoid valve to its mount-

ing bracket.

8. Attach the solenoid valve and mounting bracket to

the brewer trunk.

9. Securely fasten the water lines to and from the

solenoid valve.

10. Refer to Fig. 30 when reconnecting the wires.

REFILL SOLENOID VALVE

WHI/BLU to DBC Control Board J1-12

WHI to DBC Control Board J1-3

P799

FIG. 30 SOLENOID VALVE TERMINALS

32248 100500

1 2 ... 24 25 26 27 28 29 30 31 32 33 34

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Bunn dual sh dbc Service Manual Page 29

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