HF scientific AccUView Wastewater UV %Transmission Monitor - Manual (Page 34)

9.8 System Cleaning
The suggested cleaning period is once every three months. As this is very site specific, this
period will have to be adjusted as required.
Cleaning is recommended with chlorine to remove algae and then a Lime-A-Way to
remove calcium and lime. The system should be flushed after cleaning with each solution.
Steps:
1. Press the
MODE/EXIT key to change the instrument to the SVC mode. This will
ensure the pump will not start.
2. Disconnect the main drain and inlet tubings.
3. Install shorter tubings to perform the cleaning locally. These should be just long
enough to reach a bucket placed under or near the system.
4. Clean the T-Strainer. As described in section 9.5 above.
5. Drop both the source line and the drain line into a bucket containing 6% Sodium
Hypo chloride (bleach) solution.
6. Initiate a pump cycle by pressing the
MODE/EXIT key to switch to the pre-
AUTO mode, and then press
↵
to return to
AUTO and run the pump. Allow the
pump to run through its full pumping cycle.
7. Press the
MODE/EXIT key to change the instrument to the SVC mode. then
transfer the source line into a container at least 8 liters (2 gallons) of clean water.
Route the drain either to another container or to a convenient drain.
8. Initiate a pump cycle by pressing the
MODE/EXIT key to switch to the pre-
AUTO mode, and then press
↵
to return to
AUTO and run the pump. Allow the
pump to operate until the container is empty.
9. Press the
MODE/EXIT key to change the instrument to the SVC mode.
10. Drop both the source line and the drain line into a bucket containing a solution of
50% Lime-A-Way and 50% water.
11. Initiate a pump cycle by pressing the
MODE/EXIT key to switch to the pre-
AUTO mode, and then press
↵
to return to
AUTO and run the pump Allow the
pump to operate through its full pumping cycle.
12. Flush by repeating steps 7-9 above.
13. Reconnect the normal inlet and main drain lines.
14. Switch to
AUTO mode to continue normal operation.
AccUView Wastewater (1/09) 28
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