Bunn Brewer STF

Warning: Always disconnect the brewer from the power source before cleaning

Cleaned all surfaces with a damp cloth rinsed in mild, non-abrasive, liquid detergent

Checked and cleaned the sprayhead, ensuring all holes remain open

Inserted the deliming spring all the way into the sprayhead tube, leaving no more than two inches visible, and sawed back and forth five or six times

Is the water in your area hard?

Note: In hard water areas, step 4 may need to be done daily to prevent liming problems in the brewer

Sign off on the daily brewer cleaning

Remove wires from control thermostat leads

Remove the thermostat capillary bulb by firmly pulling-up on the capillary at the tank lid

Remove the screws securing control thermostat bracket

Slide the grommet to the line 4.5 inches above the bulb on the new capillary tube

Insert the capillary bulb through the hole in the tank lid and press the grommet firmly and evenly

Bend the capillary tube so that the tube and bulb inside the tank are in the vertical position

NOTE - The capillary tube must be clear of any electrical termination and not kinked

Secure the control thermostat inside the inspection panel

Disconnect the brewer from the power source

Locate the blue wire on the control thermostat

Check the voltage across the blue wire on the control thermostat

Disconnect the brewer from the power source

Locate the black wire on the control thermostat

Gently remove the capillary bulb and grommet from the tank

Check the voltage across the black wire of the control thermostat

Disconnect the brewer from the power source

Reinstall the capillary tube into the tank to the line 4.5\ above the bulb

NOTE: Do not remove or install wires while timer board is installed. Pressure applied to one side may cause damage to the board

Remove the two #6-32 screws securing circuit board to component mounting bracket

Remove circuit board and nylon spacers

Remove all wires from the timer

Attach all wires to the replacement timer board prior to installation to the component mounting bracket. Reconnect the wires

Install new circuit board with nylon spacers to component mounting bracket

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

Modifying brew volumes. To modify a brew volume, first check that the SET/LOCK switch is in the 'SET' position on the circuit board

NOTE: Do not remove or install wires while timer board is installed. Pressure applied to one side may cause damage to the board

Disconnect the brewer from the power source and remove the front panel

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

Voltage is present as described

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

Voltage across terminals TL1 and TL4 when the 'ON/OFF' switch is in the 'ON' position

Voltage indication is zero volts

If voltage is not as described, disconnect the brewer from the power source and replace the timer