Bunn Brewer GMB PS

Clean all surfaces on Bunn-O-Matic equipment with a damp cloth rinsed in any mild, non-abrasive, liquid detergent

Check and clean the sprayhead. The sprayhead holes must always remain open

With the sprayhead removed, insert the deliming spring (provided) all the way into the sprayhead tube. When inserted properly, no more than two inches of spring should be visible. Saw back and forth five or six times

NOTE - In hard water areas, this may need to be done daily. It will help prevent liming problems in the brewer and takes less than a minute

Sign off on the daily brewer cleaning

Warning: Ensure the brewer is unplugged before starting the procedure

Wires removed from control thermostat

Thermostat capillary bulb removed

Control thermostat removed from the mounting bracket

Grommet slid to the line 4.5\ above the bulb on the new capillary tube"

Capillary bulb inserted through the hole in the tank lid

Capillary 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

Control thermostat secured to the mounting bracket inside the hood

Disconnect the brewer from the power source

Check the voltage across the blue/black wire on the control thermostat and the white wire on the power cord

Disconnect the brewer from the power source

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

Gently remove the capillary bulb and grommet from the tank

Check the voltage across the black wire of the control thermostat and the white wire on the power cord when the control thermostat is turned 'ON'

Disconnect the brewer from the power source

Remove the two #8-32 screws 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. Reconnect the wires

Install new circuit board with spacers (as re-quired) to the component mounting bracket

Adjust the timer as described below

Check that the brewer is connected to water supply, the tank is properly filled, and a funnel and server are in place

All volume settings must be done with the sprayhead installed

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

Voltage is present as described

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