Drawing 10148 REV 0 24-11-15
Routine Maintenance of system
All maintenance processes should be recorded and have a “Risk and Method Statement” that
provides all the information necessary to complete the task.
When carrying out any maintenance on the chemical dosing system,
turn off the electricity supply to the TEC4000, close input/output sensor
assembly valves and sample line input/output valves. When handling
chemicals or parts of the chemical dosing system that have come into
contact with chemicals WEAR SUITABLE PERSONAL PROTECTIVE
EQUIPMENT. All parts of the dosing system should be kept clean and
dry where possible.
Sensor Assembly Maintenance
Probe cleaning
The probes should not be cleaned more than once every 4 weeks, if you are cleaning the probes
more often, there is another cause, which needs investigation. Only probe cleaner supplied by
Topline should be used.
Chlorine probe, pH or redox probe cleaning and inserting of new probes
Carefully disconnect the probe from the TEC4000, unscrew the probe from the sensor assembly,
place the probe in the Topline probe cleaner plastic container for about 3 minutes, remove and
rinse in fresh water, shake down to remove any air trapped in the probe tip, replace in sensor
assembly. Only tighten the probes by hand, do not use tools. Recalibrate and standardise after
cleaning.
Stainless steel electrode cleaning
The stainless steel electrode is directly below the chlorine electrode. Open the sample tap and
remove some of the water from the sensor assembly and then close the sample tap. Remove the
chlorine probe and pour 10ml of Topline probe cleaner into the sensor assembly, agitate with a
small brush and leave for 20 minutes, then carefully replace the chlorine probe.
Flushing the needle valve LHS, Top and RHS
The needle valves in the sensor assembly are to be cleared every 2 weeks. Fully open the needle
valve allowing the water to run through for 5 minutes. Adjust the needle valve so that the flow puck
is adjacent to the flow sensor.
Sensor assembly blockage
If the sensor assembly is blocked at another point then access can be gained by removing the sensor
assembly from the backboard, and removing the screw that gives access to the blockage.
Fine Mesh Strainers
Not all systems are fitted with a strainer. A strainer is a small filter unit which removes small bits
that might otherwise block the sensor assembly. It would be situated to the left of the sensor
assembly.
Flow Switch
The Topline flow sensor function is checked by closing the Inlet and Outlet isolation valves.
When the flow is interrupted ‘NO FLOW’ is shown on the display screen.
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