Bunn U3 服务手册

Page 13

 

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.
 

All components are accessible by the 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 #8-3 screws, two on the front and 

rear,  securing  front  and  rear  cupola  covers  to  the 

cupola.

Slip cupola off of the component bracket.

FIG. 1 COMPONENT ACCESS

P1317.30

Circuit Breaker  .....................................................14 

Contactor ..............................................................15

Control Thermostat ...............................................17

Fuse and Fuse Holder  ...........................................18

Limit Thermostat ...................................................19

Liquid Level Board and Level Probe  .................... 0

ON/OFF Switch ......................................................

Pump ....................................................................3

Relay  ................................................................... 4

Selector Switch (Half Batch) .................................6

Solenoid  ...............................................................7

Start Switch (Brew) ...............................................9

Tank Heater(s) .......................................................30

Thermal Cut-off  ................................................... 31

Timer (Early Models).............................................31

Digital Timer (Late Models) ...................................33

Transformer ..........................................................35

Wiring Diagrams ...................................... 36 thru 41

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