Bunn CWT Service Manual download pdf (Page 27)

Page 27

SERVICE (cont.)

WARMER ELEMENT(S)

Location:

The warmer element(s) is located under the warmer

plate.

Test Procedures:

1. Disconnect the brewer from the power source.

2. Use the white or red wire to the terminal block

and the white/red, brown/black or violet wire to

the "ON/OFF" switch.

3. Check voltage across the white or red and white/

red, brown/black or violet with a voltmeter with the

"ON/OFF" switch in the "ON" position. The indication

must be:

a) 120 volts ac for two wire 120 volt models and

three wire 120/240 volt models.

b) 200 to 230 volts ac for two wire 200 or 230 volt

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 wiring

diagrams and check brewer wiring harness.

5. Check the continuity across the two terminals on

the warmer element.

If continuity is present as described, reconnect the

white or red and white/red, and brown/black or violet

wires on the warmer element.

If continuity is not present as described, replace the

warmer element.

Removal and Replacement:

1. Remove the three #4-40 screws securing the

warmer assembly to the brewer.

2. Lift the warmer assembly from the brewer.

3. Disconnect the two wires from the warmer element

terminals.

4. Remove the two #8-32 nuts securing the warmer

element to the warmer plate.

5. Securely install new warmer element.

6. Reconnect the two wires to warmer element ter-

minals.

7. Securely install warmer assembly on the brewer.

8. Refer to the illustration below when reconnecting

the wires.

P1159

P1158

10841 071000

WHI/RED to ON/OFF Switch (One Lower Warmer)

BRN/BLK to ON/OFF Switch (Top Front Warmer

or Side Warmer)

VIO to ON/OFF Switch (Top Front Warmer or

Rear Side Warmer)

WHI to Terminal Block (120V or

120/240V Brewers)

WHI to Terminal Block (200V or

230V Brewers)

FIG. 23 WARMER LOCATION

FIG. 24 WARMER WIRING

1 2 ... 22 23 24 25 26 27 28 29 30 31 32

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Bunn CWT Service Manual Page 27

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