Service - Bunn TWF-EZ Operating & Service Manual

SERVICE

This section provides procedures for testing and
replacing various major components used in this
brewer should service become necessary. Refer to
Troubleshooting for assistance in determining the
cause of any problem.
WARNING - Inspection, testing, and repair of electri-
cal equipment should be performed only by qualified
service personnel. The brewer should be disconnected
from the power source when servicing, except when
electrical tests are required and the test procedure spe-
cifically states to plug in the brewer.
COMPONENT ACCESS
WARNING - Disconnect the brewer from the power
source before the removal of any panel or the replace-
ment of any component.
All components are accessible by the removal of
the top cover and rear inspection panel.
The top cover is attached with four #6-32 screws.
Removal of the top cover will allow access to TEA/OFF/
COFFEE switch, START switch, Control Board, limit
thermostat, temperature probe, thermal fuse and tank
heater,
The rear inspection panel is attached with six #8-
32 screws. Removal of the rear panel will allow access
to the solenoid valves and the .195 GPM flow control.
FIG. 1 COMPONENT ACCESS
Brew Solenoid Valve (Hot Coffee) ....................... 16
Brew Solenoid Valve (Iced Tea) .......................... 17
Dilution Solenoid Valve ....................................... 18
Limit Thermostat ................................................ 19
TEA/OFF/COFFEE Switch ..................................... 20
START Switch ..................................................... 21
Tank Heater ......................................................... 22
Temperature Probe ............................................. 23
Thermal Fuse ...................................................... 24
Control Board ..................................................... 25
Wiring Diagram .................................................. 26
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Contents
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P1808.40