Bunn TNTF-3 - Manual (Page 17)

Page 17
Location:
The hot tea brew timer is located in the hood on the
left side. It consists of a dial plate and circuit board.
Test Procedure:
1. Disconnect the brewer from the power source.
2. Remove the wires from terminals TL3, TL4, & TL5
of the timer and rotate the dial fully counterclock-
wise.
2. With a voltmeter, check the voltage across termi-
nals TL1 and TL2 when the ICED/OFF/HOT switch
is in the “HOT” position. Connect the brewer to
the power source. The indication must be 120
volts ac for two wire 120 volt models and three
wire 120/208 volt models.
3. Disconnect the brewer from the power source.
If voltage is present as described, proceed to #4.
If voltage is not present as described, refer to the
Wir-
ing Diagram and check the wiring harness.
4. Check for continuity across the white/orange and
white/yellow wires when the start switch is held
in the lower position.
If continuity is present as described, reconnect the
wires to terminals TL3, TL4, & TL5 of the timer board
and proceed to #5.
If continuity is not present as described, refer to the
Wiring Diagram and check the wiring harness.
5. Check the voltage across terminals TL1 and TL4
with a voltmeter when the ICED/OFF/HOT switch
is in the “HOT” position and the start switch is
momentarily placed in the lower position. Con-
nect the brewer to the power source. The indica-
tion must be 120 volts ac for two wire 120 volt
models and three wire 120/208 volt models for
approximately twenty seconds and then return to
its previous indication.
6. Disconnect the brewer from the power source.
If voltage is present as described, the timer is operat-
ing properly. Adjust the timer dial as required.
If voltage is not present as described, replace the timer.
Removal and Replacement:
1. Remove all wires from the timer.
2. Remove the circuit board and dial plate from the
brackets.
3. Install the new timer circuit board as described in
Late Model Timer section on the following pages.
4. Refer to Fig.9 when reconnecting the wires.
5. Install the Timer Setting Decal, provided with the
timer replacement kit, on the bottom of the hood
cover.
6. Adjust the timer as required. See Late Model Timer
Section on the following pages.
FIG. 7 HOT TEA BREW TIMER TERMINALS
P1365.85
FIG. 6 HOT TEA BREW TIMER P1391.60
SERVICE (cont.)
BREW TIMER (HOT TEA - EARLY MODELS)
28201 081500
OLD STYLE
OLD STYLE
WHI/RED to Hot Tea Brew Solenoid
WHI/RED to ICED/OFF/HOT Switch
WHI to Power Cord (120V Models)
or WHI to Terminal Block 120/208V
Models)
WHI/ORN to Start Switch
WHI/GRN to Hot Tea Brew
Solenoid
WHI/YEL to Start Switch