Bunn Hot Water Dispencer H5E-18-120

Disconnect the dispenser from the power source

Disconnect the thermistor from J5 on control board

Loosen the set screw and the two screws securing the two half blocks together. Remove thermistor assembly from overflow tube

Install new thermistor on tube and slide down until it contacts the flared end. NOTE: It's critical that the thermistor be centered directly under the tube opening

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

Connect the thermistor to J5 on control board

NOTE: DO NOT TEST OPERATION WITH PANELS REMOVED, AS AIR MOVEMENT CAN HINDER PROPER READINGS ON THERMISTOR

Sign off on the steam sensor replacement

Remove all wires from the electronic control board terminals

Remove the six 6-32 screws holding the electronic control board to the component bracket

Disconnect the temperature sensor, overflow tube temperature sensor, and indicator wires from the electronic control board

Attach the temperature sensor, overflow tube temperature sensor, and indicator wires to the electronic control assembly

Fasten the new electronic control board to its bracket

Upload a photo of the reconnected wires

Review the initial set-up procedures on page 6

Sign off on the electronic control replacement

Remove both wires from the limit thermostat terminals

Remove the two #10-32 nuts attaching the limit thermostat to the top of the tank

Install the new limit thermostat and secure into place with two #10-32 nuts

Refer to schematic wiring diagrams when reconnecting the wires

Sign off on the thermostat replacement

Disconnect the dispenser from the power source

Remove the top cover (3 screws) and front shroud assembly (4 screws)

Remove the top 2 screws and loosen 2 lower screws securing control panel to shroud

Disconnect switch wires from the CBA

Remove the large nut securing the switch

Installation in the reverse order

Sign off on the switch replacement

Warning: Ensure the dispenser is unplugged and cool before starting the procedure

All wires removed from the solenoid valve coil

Water supply to the dispenser turned off

Water line disconnected from the solenoid valve

Two 8-32 slotted-head screws removed from the solenoid valve and mounting bracket

New solenoid valve securely installed to the back panel

Water line securely fastened to the solenoid valve

Wires reconnected to the solenoid valve