Bunn STA, STFA, SA service manual SERVICE cont DIGITAL BREW TIMER Late Modelscont

SERVICE (cont.)

DIGITAL BREW TIMER (Late Models)(cont.)

Timer Setting:

NOTE: Check that the brewer is connected to water supply, the tank is properly filled, and a funnel and server are in place, prior to setting or modifying volumes.

NOTE: All volume settings must be done with the sprayhead installed.

1.Modifying brew volumes. To modify a brew vol- ume, first check that the SET/LOCK switch is in the "SET" position on the circuit board.

To increase a brew volume, place the ON/OFF switch in the "ON" position, press and hold 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 previous volume setting will remain in memory) and press it again one or more times. 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 "ON" position, press and release the START switch once for every two-second interval to be removed from the total brew time period; then imme- diately 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 previous volume setting will remain in memory). Allow the brew cycle to finish in order to verify that the desired volume has been achieved.

2.Setting brew volumes. To set a brew volume, first check that the SET/LOCK switch is in the "SET" position on the circuit board. Place the ON/OFF switch in the "ON" 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 sec- onds after the third click causes the volume setting 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 "OFF".

NOTE: Several ounces of water will continue to syphon from the tank after turning the switch "OFF". 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, volumes will decrease due to absorption by the coffee grounds.

3.Setting programming disable feature. If it be- comes necessary to prevent anyone from changing brew time once programmed, you can set the SET/ LOCK switch to the "LOCK" position. This will prevent any further programming.

NOTE: To relocate a rear-mounted digital brew timer to the front of the brewer, order kit number 32005.0000 for 120/240V 3-wire models. Order 32005.0001 for 200V-240V 2-wire models. These kits have the parts necessary to relocate the timer.

TL1 - WHI/RED to ON/OFF Switch

TL2 - WHI to Terminal Block and Warmer element (120V two-pole, 120/208V or 120/240V three pole terminal block) or

RED to Terminal Block and Warmer element (200V or 240V two pole ter- minal block)

TL3 - WHI/ORN to Start Switch (Top) TL4 - WHI/GRN to Solenoid Valve or Relay

Terminal B

TL5 - WHI/YEL to Start Switch (Bottom)

P2037

FIG. 17 DIGITAL TIMER WIRING

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