Warmer Elements - Bunn C Series Service & Repair Manual

SERVICE (cont.)
WARMER ELEMENT(S)
FIG. 28-1 WARMER ELEMENTS
Location:
The warmer element(s) is located under the warmer
plate.
Test Procedures:
1. Disconnect the brewer from the power source.
2. With a voltmeter, check voltage across the two
wires at the warmer element with the "ON/OFF"
switch in the "ON" position. Connect the brewer
to the power source. The indication must be 120
volts ac for two wire 120 volt models and three
wire 120/208 and 120/240 volt models, or 230
volts ac for two wire 230 volt models.
3. Disconnect the brewer from the power source.
If voltage is present as described, proceed to #4.
If voltage is not present as described, refer to Wiring
Diagrams and check wiring harness.
WARMER
100W-120V
100W-220V
100W-200V
TERMINAL TO SHEATH - INFINITE (OPEN)
FIG. 28-2 WARMER ELEMENTS
RESISTANCE
132 - 152
450 - 532
372 - 432
Page 28
4. Check the resistance across the two terminals on
the warmer element. NOTE: There should be no
resistance reading between the heater sheath and
either terminal. Refer to the following chart.
If resistance is to specification, reconnect the two
wires to the warmer element.
If resistance is not to specification, 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.
WHI/RED to ON/OFF Switch (Center Warmer)
YEL to ON/OFF Switch (Left Front Warmer)
WHI/VIO to ON/OFF Switch (Left Rear Warmer)
BRN/BLk to ON/OFF Switch (Right Front Warmer)
VIO to ON/OFF Switch (Right Rear Warmer)
FIG. 28-3 WARMER ELEMENT TERMINALS
WHI to Terminal Block (120V or
120/240V Brewers)
RED to Terminal Block (200V or
240V Brewers
41711.1 052009