Service - Bunn OT 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.
Component Access
WARNING - Disconnect the brewer from the power
source before the removal of any panel or the replace-
ment of any component.
The brew timer, and control thermostat are lo-
cated behind the front panel, FIG. 1 located beneath
the brew funnel, attached with four #8-32 slotted-head
screws.
The base warmer(s), switch(es), indicator lamp,
start switch, tank "keep warm" heater, terminal block,
and solenoid valve, are located in the base. Access is
gained by removing the rear panel, FIG. 1 attached
with two #8-32 slotted-head screws
The limit thermostat, and tank heater are located
on the tank lid. Access is gained by removing the top
lid, FIG. 1 attached with three #8-32 slotted head
screws. On the model OT, the upper warmer, switch,
and associated indicator lamp are located on this re-
movable top lid.
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
specifically states to connect the brewer to the power
source.
P1687
Brew Timer (Early Models) ................................... 13
Digital Timer (Late Models) .................................. 14
Control Thermostat ............................................... 16
Warmer(s)
OT:
Brew Station & Upper .............................................
RT:
Left Rear, Left Front, Brew Station, & Right Front ...
RT:
Right Rear Three Heat .............................................
Warmer Switch(es)
OT:
On/Off Brew Station & Upper ..................................
RT:
On/Off Brew Station ................................................
RT:
Left Rear, Left Front, & Right Front Rotary..............
RT:
Right Rear Three Heat Rotary .................................
Indicator Lamp(s) ................................................. 22
Limit Thermostat .................................................. 23
Solenoid Valve ...................................................... 24
Start Switch .......................................................... 25
Tank Heater ........................................................... 26
Thermal Cut-off ................................................... 27
Wiring Schematics............................................... 28
FIG. 1 ACCESS PANELS
Page 12
Contents
G
IN
R N
W A ER
RM
! AT WA DR Y
HE NT ER
HI GH CA S AW AY
IL DE LE S
T BO TIB RI SK
NO MB US LY UI D
DO CO MP LIQ
KE EP CO OT RD
RE TO RE /H ZA
ILU ILU E HA
FA S FA D FIR
AS S AN
GL RN
BU
17
17
18
19
19
20
21
P1688
10021 071700