Table Of Contents - Bunn SRU 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 unplugged
when servicing, except when electrical tests are re-
quired and the test procedure specifically 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.
The control thermostat, limit thermostat, pump,
solenoid valve, liquid level probe and tank heater are
accessible by removal of the swing spout, front cupola
cover, rear cupola cover and the cupola.
Disconnect the swing spout nut from the swing
spout base fitting. Remove swing spout.
Remove the four #8-32 screws, two on each side,
securing the side covers to the cupola.
Slip cupola off of the component bracket.
The on/off switch, selector switch, start switch,
timer, contactor and liquid level control board are ac-
cessible by removal of the front lower panel.
Remove the four #8-32 screws securing the front
access panel to the base.
The circuit breaker, fuse and fuse holder are ac-
cessible by removal of the rear utility cover.
Remove the six #8-32 screws securing the rear
utility cover to the housing.
Circuit Breaker .....................................................15
Contactor ..............................................................16
Control Thermostat ...............................................18
Fuse and Fuse Holder ...........................................19
Limit Thermostat ...................................................20
Liquid Level Board and Level Probe .................... 21
ON/OFF Switch ......................................................23
Pump ....................................................................24
Selector Switch (Half Batch) .................................25
Solenoid ...............................................................26
Start Switch (Brew) ...............................................27
Tank Heater ...........................................................29
Thermal Cut-off ................................................... 30
Timer (Early Models).............................................31
Digital Brew Timer (Late Models) ..........................33
Master ON/OFF Switch (Late Models) ...................35
Wiring Diagrams ...................................... 36 thru 38
FIG. 1 COMPONENT ACCESS
Page 14
Contents
P2053.25
10067 080200