Bunn Coffee Machine CWTF 15 PF

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

Remove circuit board and spacers (as required)

Remove all wires from the timer

Attach all wires to the replacement timer board prior to installation to the component mounting bracket. Refer to FIG. 21 when reconnecting the wires

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

Adjust the timer as described below

Sign off on the timer replacement

Disconnect the brewer from the power source

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

With the 'ON/OFF' switch in the 'ON' upper position press the start switch

Check the voltage across the white/blue and white/green wires with a voltmeter

Disconnect brewer from the power source

Is voltage present as described?

If voltage is not present as described, refer to Wiring Diagrams and check brewer wiring harness

Check for continuity across the solenoid valve coil terminals

Remove the white/blue and white/green from the solenoid valve

Turn-off the water supply to the brewer

Disconnect the water lines to and from the solenoid valve

Remove the two #8-32 screws securing the solenoid mounting bracket to the component bracket. Remove solenoid bracket and solenoid valve as an assembly

Remove the two #10-32 screws and lockwashers securing the solenoid valve to the solenoid bracket

Using two #10-32 screws and lockwashers install new solenoid valve on solenoid mounting bracket

Using two #8-32 screws install solenoid valve and bracket to the component bracket

Securely fasten the water lines to and from the solenoid valve

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 to the new limit thermostat

Sign off on the limit thermostat replacement

Disconnect the water supply tube from the fill basin

Remove the tank inlet fitting securing the fill basin to the tank lid, remove fill basin and tank inlet gasket. Set all three parts aside for reassembly

On brewers with faucet shut-off water supply to the brewer and disconnect the inlet and outlet water lines to the faucet coil assembly

Disconnect the black wire on the limit thermostat from the tank heater switch. On late model brewers also disconnect the blue wire from the limit thermostat to the control thermostat

Disconnect the black wire and the white or red wire from the tank heater terminals

Remove sprayhead and the hex nut securing the sprayhead tube to the hood. Set aside for reassembly

Remove the eight #8-32 nuts securing the tank lid to the tank

Remove the tank lid with limit thermostat, sprayhead tube, tank heater, coil assembly and control thermostat w/bracket (early models only)

Remove the two hex nuts securing the tank heater to the tank lid. Remove tank heater with gaskets and discard