Drawing 10148 REV 0 24-11-15
Routine Maintenance of system (Cont) Auxiliary dosing equipment dosing pumps etc.
Injector, Rodding or quill unit
The injector allows the chemical solution into the pool and prevents pool water from entering the
injector pipe. The injector is either located directly, via a rodding or quill unit into the pool pipe
work and is connected to the dosing pump via the injector pipe. Rodding units do not negate the
need to clean the injector; they just increase the maintenance period. PTFE tape is used on the
injector where it screws into the pool pipe work. The PTFE tape will need replacing when the
injector is removed. The injector should only be hand tight. It will need cleaning or replacing if the
dosing pump will not work or prime. Before removing or replacing the injector release the pressure
If a rodding unit is fitted the rod should normally be fully withdrawn, and pushed in to clean the
injector every day. The rodding unit rod is pushed in by loosening the cap a half turn, pushing the
rod fully in, withdrawing fully and retightening the cap. If the rod is stiff then the rodding assembly
should be removed and cleaned. Injection points should be labelled.
Electric agitator
The electric agitator contains no parts that can serviced by the operator. If an electric agitator is
fitted, the chemical solution should not be allowed to fall below half way in the day tank. All
chemical spills on or near to the agitator are to be cleaned immediately. The agitator warranty will
be void if it is not kept clean.
Hand Transfer Pump
After using the hand transfer pump it is essential that the pump is flushed with fresh water. If the
pump is not flushed with fresh water it will leak and be permanently damaged.
CO2 injectors Maintenance
The CO2 system (apart from an annual parts replacement) does not normally need any day to day
maintenance, but in hard water areas it may be necessary to examine the CO2 diffuser for calcium
salt blockage and if necessary, removal of this with a de-scaling acid.
Restarting the TEC4000 after maintenance
Open the sensor assembly and sample line input/output valves and allow pool water to flow through
the sensor assembly for 20 minutes. Turn the TEC4000 electricity supply on, recalibrate,
standardise and turn the dosing pump circuit breakers on. The TEC4000 will need recalibrating and
standardising 24 hours later if the probes have been cleaned
Winter shut down procedure
If the pool that the TEC4000 is controlling is to be closed for a long period, then the following
procedure should be implemented on the TEC4000.
1. Turn off TEC4000.
2. Isolate sensor assembly using the input and output isolation valves.
3. Empty chemical day tanks.
4. Flush dosing pumps with fresh water.
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