Bunn Brewer TU3Q

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

Disconnect the white/violet and white/green wires from the solenoid valve

Press the start switch with the ON/OFF switch in the 'ON' upper position

Voltage across the white/violet and white/green wires

If voltage is not as described, check brewer wiring harness

Check for continuity across the solenoid valve coil terminals

If continuity is not present as described, replace the solenoid valve

Check the solenoid valve for coil action

Remove both wires from the control thermostat terminals

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

Remove the #8-32 screw holding the control thermostat to its bracket

Slide the grommet to the line 4.5\ 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 so that the groove in the grommet fits into the tank lid

Carefully bend the capillary tube so that the tube and bulb inside the tank are in a vertical position

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

Fasten the new control thermostat to its bracket

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 access panel

Remove the two #8-32 screws securing circuit board to the mounting bracket

Remove circuit board and spacers (as required)

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

Disconnect the brewer from the power source

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

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

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

Sign off on the timer replacement

Remove all wires from the solenoid valves

Turn off the sweetener supply to the brewer

Disconnect the water lines to and from the solenoid valves

Remove the two #8-32 keps nuts holding the mounting bracket to the trunk base

Remove the two #10-32 slotted-head screws holding the solenoid valve to the mounting bracket

Securely install the new solenoid valve to the mounting bracket

Attach the mounting bracket to the trunk base

Securely fasten the sweetener and water lines to and from the solenoid valves