Bunn Dual TF - Manual (Page 31)

Page 31
Location:
Electro/mechanical Controlled Brewers
The relays are located inside the hood, the
right relay just to the right of the contactor in front of
the tank and left relay is just left of the component
bracket in front of the tank.
Electronic Controlled Brewers
The relay is located inside the hood just to the
right of the contactor in front of the tank.
Test Procedures:
Electro/mechanically Controlled Brewers.
1. Disconnect the brewer from the power source.
2. Locate the black wire on the left relay center
terminal and the blue wire on the right relay center
terminal.
3. Check the voltage across the black and blue wire
with a voltmeter. Connect the brewer to the power
RELAY (Brewers W/Recovery Booster)
NOTE -Electro/ mechanically controlled brewers have
two relays and the electronic controlled have one relay.
SERVICE (cont.) 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 brewer from the power source.
If voltage is present as described, proceed to #5.
If voltage is not present as described, refer to the
wiring diagrams and check the brewer wiring harness.
5. Remove the white/green wire from the "A" terminal
and white/violet wire from the "B" terminal on the
right relay, the white/brown from the "A" terminal
and white/red wire from "B" terminal on the left
relay.
6. Check for continuity across the "A" and "B" termi-
nals of each relay.
If continuity is present as described, reconnect the
white /green wire and white violet wire to the right relay
or the white/brown and the white /red wire to the left
relay and proceed to #7.
If continuity is not present as described, replace the
relay(s).
7. Remove the two blue wires from terminal 5 and
the red wire from terminal 7 on the right relay, the
black wires from terminal 5 and the red wire from
terminal 7 on the left relay.
8. Check for continuity across terminals 5 and 7 of
each relay by manually closing relay contact. Con-
tinuity must not be present when contact is re-
leased.
If continuity is present as described, reconnect blue
wires to terminal 5 on the right relay, the black wires
to terminal 5 on the left relay and the red wire to left and
right terminal 7, the relays are operating properly.
If continuity is not present as described, replace the
relay(s).
Electronically Controlled Brewers
NOTE: Brewer must be at operating temperature to
perform test procedures or brew-lock must be
bypassed. To bypass brew-lock disconnect white/
orange and brown/black for right timer or orange
and red/black for left timer from brew-lock of ECA
and connect the harness leads together.
P982
. MI NU TE S
BU NN -O -M AT IC
P/ N 26 20 - 12 0 V AC
. MI NU TE S
BU NN -O -M AT IC
P/ N 26 20 - 12 0 V AC
2 2 2
1.5 1.5
1 1
1
.5 .5
2.5 2.5
MI NU TE S MINUTES
MI NU TE S MINUTES
MI NU TE S MINUTES
P/ N 24 48 6-0 00 0 12 0 V AC
P/N 24486-0000 120 VAC
BU NN -O -M AT IC
BUNN-O-MATIC 3 3
3
4
4
5
5
6
6 7
8
2 2 2
1.5 1.5 1 1
1
.5 .5
2.5 2.5
MI NU TE S MINUTES
MI NU TE S MINUTES
MI NU TE S MINUTES
P/ N 24 48 6-0 00 0 12 0 V AC
P/N 24486-0000 120 VAC
BU NN -O -M AT IC
BUNN-O-MATIC 3 3
3
4 4
5
5
6
6 7 8
ST AR T ON / W AR ME R
SE LE CT OR
RE AD Y
RE AD Y
ON / W AR ME R ST AR T
1 1⁄2 ga l 1 ga l 1⁄2 gal
SEL EC TO R
1 1⁄2 gal 1 g al 1⁄2 ga l