Bunn Hot Water Dispencer H5XA

Warning: Ensure the dispenser is unplugged before starting the procedure

All wires removed from the level control board

Two #8-32 screws removed from level control board and mounting bracket

New level control board and mounting bracket installed to the component bracket

Upload a photo of the reconnected wires

Sign off on the board replacement

Warning: This procedure requires trained personnel with PPE!

Disconnect the dispenser from the power source

Voltage across terminals 3 & 4 of the electronic control board

Voltage is within the correct range for the model

Check the dispenser wiring harness if voltage was not present as described

Remove the pink wire from terminal 5 of the electronic control assembly

Voltage across terminals 1 & 4 of the electronic control board

Voltage is within the correct range for the model after a delay of approximately 5 seconds

Disconnect the dispenser from the power source

Remove all wires from the solenoid valve coil

Turn-off the water supply to the dispenser

Disconnect the water line from the solenoid valve

Remove the two 8-32 slotted-head screws holding the solenoid valve and mounting bracket to the back panel

Securely install the new solenoid valve to the back panel

Securely fasten the water line to the solenoid valve

Sign off on the solenoid valve replacement

Both wires removed from the limit thermostat terminals

Two #10-32 nuts removed attaching the limit thermostat to the top of the tank

New limit thermostat installed and secured into place with two #10-32 nuts

Wires reconnected according to schematic wiring diagrams

Sign off on the thermostat replacement

Warning: Disconnect the dispenser from the power source before starting the procedure

Disconnected the dispenser from the power source

Disconnected the thermistor from J5 on control board

Loosened the set screw and the two screws securing the two half blocks together

Removed thermistor assembly from overflow tube

Installed new thermistor on tube and slid down until it contacts the flared end

NOTE: It's critical that the thermistor be centered directly under the tube opening

Snugged the set screw so the block assembly does not move around easily

Connected the thermistor to J5 on control board