The Bunn Brewer TU3Q is a high-performance commercial coffee brewer designed for efficiency and reliability. This model features advanced brewing technology, ensuring consistent quality and flavor in every cup. Ideal for cafes and restaurants, the TU3Q streamlines coffee preparation while minimizing maintenance needs.

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Manual for Bunn Bunn Brewer TU3Q TU3Q

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Tensioning Guide
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C-120 pulleys
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Daily Electrical System Inspection
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Bunn Bunn Brewer TU3Q TU3Q

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Maintenance Plans for Bunn Bunn Brewer TU3Q Model TU3Q

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Brewer Timer Replacement

Remove all wires from the timer

Remove the circuit board and dial plate from the brackets

Install the new timer circuit board as described in Late Model Timer Section

Reconnect the wires

Install the Timer Setting decal, provided with the replacement timer kit, to the rear of the schematic, on the bottom of the top cover

Adjust the timer as required

Sign off on the timer replacement

Run this procedure

Brewer Limit Thermostat Replacement

Both wires removed from the limit thermostat terminals

Limit thermostat carefully slid out from under the retaining clip

New limit thermostat carefully slid into the retaining clip

Wires reconnected

Sign off on the Brewer Limit Thermostat Replacement

Run this procedure

Brewer Timer Test

Warning: Disconnect the brewer from the power source before starting the test

Remove the wires from terminals TL3, TL4, & TL5 of the timer and rotate the dial fully counterclock-wise

Voltage across terminals TL1 and TL2 when the ON/OFF switch is in the ON position

Voltage reading

If voltage is not present as described, check the wiring harness

Check for continuity across the white/orange and white/yellow wires when the start switch is held in the lower position

If continuity is not present as described, check the wiring harness

Voltage across terminals TL1 and TL4 when the ON/OFF switch is in the ON position and the start switch is momentarily placed in the lower position

Voltage reading

Run this procedure

Brewer Start Switch Replacement

Remove the wires from the switch terminals

Compress the clips inside the hood and gently push the switch through the opening

Push the new switch into the opening and spread the clips to hold the switch captive in the hood

Reconnect the wires

Sign off on the switch replacement

Run this procedure

Brewer On/Off Switch Test

Disconnect the brewer from the power source

Remove the black and white/violet wires from the switch terminals

Voltage across the black wire removed from the ON/OFF switch and the white wire on the 100 and 120 volt two wire, and red wire on the 230 volt two wire remaining on the switch terminal

Connect the brewer to the power source

Indication must be

Disconnect the brewer from the power source

If voltage is present as described, proceed to #6

If voltage is not present as described, check the wiring harness

Check for continuity across the center and end terminals of the top row when the switch is in the 'ON' position

Run this procedure