Service - Bunn OL 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 control thermostat, solenoid valve and relay
are located under the top cover or top warmer hous-
ing, FIG. 1, attached with three #8-32 slotted-head
screws.
The base warmer(s), switch(es), indicator lamp,
start switch, tank "keep warm" heater and terminal
block 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 assembly. Access is gained by removing
the rear panel, FIG. 1 attached with two #8-32 slotted
head screws.
On the model OL, the upper warmer, switch, and
associated indicator lamp are located on the remov-
able top warmer housing, FIG. 1.
P1712
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.
Control Thermostat ............................................... 13
Warmer(s)
OL:
Brew Station & Upper .............................................
RL:
Left Rear, Left Front, Brew Station, & Right Front ..
RL:
Right Rear Three Heat ............................................
Warmer Switch(es)
OL:
On/Off Brew Station & Upper ..................................
RL:
On/Off Brew Station ................................................
RL:
Left Rear, Left Front, & Right Front Rotary .............
RL:
Right Rear Three Heat Rotary .................................
Start Switch .......................................................... 19
Indicator Lamp(s) ................................................. 20
Limit Thermostat .................................................. 21
Solenoid Valve ...................................................... 22
Relay..................................................................... 23
Tank Heater ........................................................... 24
Over Flow Safety Switch ....................................... 25
Wiring Schematics............................................... 26
FIG. 1 ACCESS PANELS
Page 12
Contents
IN G
R N
W A ER
RM
WA Y
! HE AT ER DR
GH NT AY
HI DE CA S AW
T BO IL TIB LE SK S
NO US RI D
DO CO MB MP LY UI
EP CO OT LIQ
KE TO /H ZA RD
RE ILU RE E HA
FA ILU S FA FIR
AS D
GL S AN
BU RN
14
14
15
16
16
17
18
P1713
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