Bunn TU3Q service manual Digital Timer Wiring

SERVICE (cont.)

DIGITAL BREW TIMER (Late Models) (cont.)

To increase a brew volume, place the ON/OFF switch in the ÒONÓ position, press and hold the START switch until three clicks are heard. Release the switch and press it again one or more times. (Failure to re- lease the switch within two seconds after the third click causes the volume setting to be aborted and pre- vious volume setting will remain in memory.) Each time the switch is pressed, two seconds are added to the brew time period. Allow the brew cycle to finish in order to verify that the desired volume has been achieved.

To decrease a brew volume, place the ON/OFF switch in the ÒONÓ position, press and release the START switch once for every two-second interval to be removed from the total brew time period; then im- mediately press and hold down the START switch until three clicks are heard. Release the switch. (Failure to release the switch within two seconds after the third click causes the volume setting to be aborted and pre- vious volume setting will remain in memory). Allow the brew cycle to finish in order to verify that the de- sired volume has been achieved.

2.Setting brew volumes. To set a brew volume, first check that the SET/LOCK switch is in the ÒSETÓ posi- tion on the circuit board. Place the ON/OFF switch in the ÒONÓ position, press and hold the START switch until three distinct clicks are heard and then release the switch. (Failure to release the switch within two seconds after the third click causes the volume set- ting to be aborted and previous volume setting will remain in memory.)

View the level of the liquid being dispensed. When the desired level is reached, turn the ON/OFF switch to ÒOFFÓ.

NOTE: Several ounces of water will continue to sy- phon from the tank after turning the switch ÒOFFÓ. The brewer remembers this volume and will continue to brew batches of this size until the volume setting procedure is repeated.

NOTE: When brewing coffee, volume will decrease due to absorption by the coffee grounds.

3.Setting programming disable feature. If it becomes necessary to prevent anyone from changing brew time once programmed, you can set the SET/LOCK switch to the ÒLOCKÓ position. This will prevent any further programming until switch is once again put into the ÒSETÓ position.

TL1 - WHI to Power Cord (100V & 120V) or
RED to Power Connector (230V) and
WHI to On/Off Switch (100V & 120V) or
RED to On/Off Switch (230V)
TL2 - WHI/VIO to Brew Solenoid and
WHI/VIO to On/Off Switch
TL3 - WHI/ORN to Start Switch
TL4 - WHI/GRN to Brew Solenoid
TL5 - WHI/YEL to Start Switch	P2037

FIG. 7 DIGITAL TIMER WIRING

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