Bunn ITB Technical Training Manual page 18

Step 3: Remove and clean the temperature sensor and refill probe:
□ Gently pull the temperature sensor and refill probe from the grommet in the top of the tank or you can remove
entire tank lid by removing a total of 8 – 8/32 hex nuts.
□ Clean any mineral build-up from the probe.
□ Reinstallation is the opposite of removal.
Step 4: Remove and clean the sprayhead:
□ Using the pointed end of the deliming key, remove any mineral build-up from the sprayhead outlet holes.
□ Clean sprayhead fitting
Step 5: Clean tank dispense outlet fitting:
□ Remove the hose clamp that secures tubing to the tank dispense outlet fitting. Removal of the tank lid may be
required depending upon the severity of the mineral build-up.
□ Remove silicone hose from tank fitting.
□ Clean inside of tank fitting of any mineral build-up.
□ Reassembly is the opposite of disassembly.
Step 6: Rebuild the dispense solenoid:
□ Remove the hose clamps that secure the tubing to the valve.
□ Remove the two nuts that hold the solenoid bracket to the machine.
□ Gently remove the tubing from the valve body.
□ Using a flat blade screwdriver, remove the four screws and separate the
valve assembly.
□ Replace plunger, spring, and rubber seat using the rebuild kit BUNN
P/N: 11517.0008.
□ Clean any mineral build-up from the valve.
□ Reassembly is the opposite of disassembly.
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ITB Training Manual