The Bunn Coffee Machine CWTF DUAL is a reliable commercial coffee maker designed for high-volume environments. Known for its durability and efficiency, this model ensures consistent brewing quality, making it a staple in cafes and restaurants. Regular maintenance is essential to keep it operating at peak performance.

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Manual for Bunn Coffee Machine CWTF DUAL (OLDEST)

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Bunn Coffee Machine CWTF DUAL (OLDEST)

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Maintenance Plans for Bunn Coffee Machine Model CWTF DUAL (OLDEST)

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Coffee Machine Dial Timer Replacement

Warning: Disconnect the machine from power source before starting the procedure

Disconnect the timer socket from the brewer wiring harness and the timer leads from the solenoid valve

Remove the one #8-32 screw securing timer to component bracket

Install new timer on component bracket securing with one #8-32 screw

Upload a photo of the reconnected wires

Enter the timer dial adjustment

Sign off on the timer replacement

Run this procedure

Coffee Machine Selector Switch Replacement

Remove the pink and tan wires from the switch

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

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

Reconnect the wires

Sign off on the switch replacement

Run this procedure

Coffee Machine Limit Thermostat Replacement

Warning: Ensure the coffee machine is unplugged before starting the procedure

All wires removed from limit thermostat terminals

Limit thermostat slid out from under the retaining clip and removed

New limit thermostat slid into the retaining clip

Wires reconnected

Sign off on the thermostat replacement

Run this procedure

Coffee Machine Digital Brew Timer Replacement

Warning: Ensure the coffee machine is unplugged before starting the procedure

Removed the #8-32 screw securing circuit board to the mounting bracket

Removed circuit board and spacers (as required)

Removed all wires from the timer

Attached all wires to the replacement timer board prior to installation to the component mounting bracket

Upload a photo of the wires connected as per FIG. 21

Installed new circuit board with spacers (as required) to the component mounting bracket

Adjusted the timer as described

Sign off on the timer replacement

Run this procedure

Coffee Machine Tank Heater Test

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

Voltage across the black and white wires on 120 volt models or the black and red wires for 120/240 volt models, 200 volt models and 230 volt models checked with a voltmeter

Voltage indication

Voltage present as described

If voltage is not present as described, check wiring harness

Black wire and the white or red wire disconnected from the tank heater terminals

Continuity across the tank heater terminals checked

Continuity present as described

If continuity is not present as described, replace the tank heater

Run this procedure