Warmer Element - Bunn CT Operating & Service Manual

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 indica-
tion 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 ele-
ment 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 termi-
nals.
7. Securely install warmer assembly on the brewer.
8. Refer to the illustration below when reconnecting
the wires.
P1158
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 Rear Warmer or
Rear Side Warmer)
WHI to Terminal Block (120V
or 120/240V Brewers)
RED to Terminal Block (200V or
230V Brewers)
Page 27
P1159
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