SERVICE (cont.)

5.

Check the solenoid valve for coil action. Connect

DILUTION SOLENOID VALVE

 

the brewer to the power source, place the TEA/

 

OFF/COFFEE switch in the “TEA” position and mo-

 

 

 

 

 

 

mentarily place the START switch in the lower po-

 

 

 

sition and release. Listen carefully in the vicinity

 

 

 

of the solenoid valve for a “clicking” sound as the

 

 

 

coil magnet attracts.

 

 

6.

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 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.

 

P2198.50

Removal and Replacement:

 

FIG. 16 DILUTION SOLENOID VALVE

1.

Remove all wires from the solenoid valves.

 

2.

Turn off the water supply to the brewer.

 

 

Location:

3.

Disconnect the water lines to and from the sole-

 

Viewing the brewer from the rear the dilution so-

 

noid valves.

lenoid is mounted on the right side of the solenoid

4.

Remove the two #8-32 keps nuts holding the

mounting bracket which is secured to the trunk base.

5.

mounting bracket to the trunk base.

 

 

Lift out the bracket.

Test Procedure:

6.

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

1. Disconnect the brewer from the power source.

 

ing the solenoid valve to the mounting bracket.

2.

With a voltmeter, check the voltage across the

7.

Securely install the new solenoid valve to the

 

white/blue and white/violet wires on the dilution

 

mounting bracket.

 

solenoid terminals when the TEA/OFF/COFFEE

8.

Attach the mounting bracket to the trunk base.

 

switch is in the “TEA” position and the START

9.

Securely fasten the water lines to and from the

 

switch is momentarily placed in the lower posi-

 

solenoid valves.

 

tion. Connect the brewer to the power source.

10.

Refer to Fig. 17 when reconnecting the wires.

 

The indication must be 120 volts ac for two wire

 

 

 

120 volt models and three wire 120/208 volt mod-

 

 

 

els.

 

WHI/BLU to Iced

3. Disconnect the brewer from the power supply.

 

 

Tea Brew Timer

 

 

 

 

 

 

TL4

If voltage is present as described, proceed to #4.

If voltage is not present as described, refer to the Wir- ing Diagrams and check the wiring harness.

 

 

WHI/VIO to Iced

4. Remove both wires from the coil and check for

HOT COFFEE

Tea Brew Timer

TL1

 

continuity across the coil terminals.

BREW SOLENOID

 

ICED TEA BREW

 

 

 

 

 

 

SOLENOID

 

 

If continuity is present as described, reconnect the

 

DILUTION

 

white/blue and white/violet wires and proceed to #5.

 

 

 

SOLENOID

 

If continuity is not present as described, replace the

 

P1364

 

 

solenoid valve.

FIG.17 SOLENOID VALVE TERMINALS

 

Page 24

10510

081599

 

 

Page 23 Page 25
Page 24
Image 24
Bunn TWF service manual Dilution Solenoid Valve
Page 23 Page 25

TWF specifications

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