Hach EZ Series Basic User Manual page 31

9.12 Replace the dispenser valve
Do to the steps that follow to replace the dispenser valve:
1. Flush the dispenser piston with deionized water to remove the reagent.
Note: Set the drain pump to on during this step.
2. Remove the deionized water from the dispenser (fill the dispenser with air).
Note: Set the drain pump to on during this step.
3. Remove power to the analyzer.
4. Remove the syringe. Refer to
5. Replace the valve. Refer to the illustrated steps that follow.
6. Apply power to the analzer. Set the analyzer to on.
7. Fill the dispenser with reagent. Examine for leaks.
8. When the procedure is complete, push F2 > Dispenser > [select dispenser] > E > Init to start the
dispenser operation.
Replace the dispenser syringe on page 30.
English 31