Wiring diagrams, On/off switch – Bunn Dual TF User Manual
Page 28
Page 28
SERVICE (cont.)
Location:
The ON/OFF switches are located on the front
of the hood just to the left and right of the start
switches.
Test Procedure:
1. Disconnect the brewer from the power source.
2. Viewing the switch from the back remove the white
or red wire from the upper right terminal and the
black wire from the center terminal.
3. Check the voltage across the white wire and the
black wire or red and black wire with a voltmeter.
Connect the brewer to the power source. The
indication must be:
a.) 120 volts ac for three wire 120/208 volt mod-
els and three wire 120/240 volt models.
b.) 200 to 240 volts ac for two wire 200 or 240 volt
models.
4. Disconnect the brewer from the power source.
If voltage is present as described, reconnect the white
or the red wire, and proceed to #5.
If voltage is not present as described, refer to the
Wiring Diagrams
and check the brewer wiring har-
ness.
5. With the black wire removed, remove the white/
red wire on the left switch or the white/violet wire
on the right switch from the lower left terminal.
6. Check for continuity across the center and lower
P793
ON/OFF SWITCH
P980
WHI/VIO to Right
Timer TL1
RIGHT
LEFT
BLK to Terminal
Block (Black
Insert)
WHI to Terminal
Block ( White Insert
on 120/208V
or 120/240V Models)
RED to Terminal
Block (Red Insert on
200V or 240V Models)
WHI/RED to Left
Timer TL1
BLK to Terminal
Block (Black
Insert)
WHI to Terminal
Block (White Insert
on 120/208V
or 120/240V Models)
RED to Terminal
Block (Red Insert on
200V or 240V Models)
left terminal with switch in the "ON" position.
Continuity must not be present when switch is in
the "OFF" position.
If continuity is present as described, reconnect the
black wire to the center terminal and the white/red wire
on the left switch or the white/violet on the right switch
to the lower left terminal.
If continuity is not present as described, replace the
switch.
Removal and Installation:
1. Remove the wires from the switch terminals.
2. Compress the clips inside the hood and gently
push the switch through the opening.
3. Push the new switch into the opening and spread
the clips to hold switch in the hood.
4. Refer to the illustration below when reconnecting
the wires.
B
U
N
N
MA
NU
FA
CT
UR
ED
B
Y
BU
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-M
AT
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IN
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LD
, IL
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U
.S
.A
.
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L
S/N
VO
LT
S
A
.C
.
A
MP
W
AT
TS
PH
AS
E
W
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E
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ER
TZ
CO
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RE
D U
ND
ER
O
NE
O
R
MO
RE
OF
TH
E
FO
LL
OW
IN
G P
AT
EN
TS
:
ON
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R
MO
RE
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TH
ER
P
AT
EN
TS
M
AY
B
E
PE
ND
IN
G
OP
ER
AT
IN
G P
RO
CE
DU
RE
S
1.
Ch
ec
k S
erv
er s
ize
if
Bre
wer
ref
us
es
to
bre
w.
2.
Mc
Don
ald
's B
rew
Te
mpe
ratu
re: 2
00
°
F
±
5
°
(3-
18
-96)
CA
UT
IO
N
DI
SC
AR
D
DE
CA
NT
ER
IF:
. C
RA
CK
ED
. S
CR
AT
CH
ED
. B
OI
LE
D D
RY
. H
EA
TE
D
W
HE
N
EM
PT
Y
. U
SE
D
ON
H
IG
H F
LA
ME
. O
R
EX
PO
SE
D
EL
EC
TR
IC
E
LE
ME
NT
S
FA
ILU
RE
TO
C
OM
PL
Y
RI
SK
S
IN
JU
RY
PN
: 6
58
19
85
B
UN
N-
O-
MA
TIC
C
OR
PO
RA
TIO
N
FU
NN
EL
C
ON
TE
NT
S
AR
E
HO
T
!