Corrosion results in the formation of sludge and debris in the central heating system. Sludge formation could lead to blockage in important areas of the system like radiators, pipes, heat exchangers, etc and could potentially crash the entire system. Power flushing is the process of removing the sludge and debris from your central heating system in the home. Power flushing not only removes the sludge and debris but also maintains pure water and increases the overall efficiency of the system. When the efficiency of the central heating system increases, it results in lower power consumption and reduced energy bills.
List of things required for power flushing
- Powerflow flushing machine unit
- TDS meter
- Powerflush cleaning chemical F5
- Flushing adapter or powerflow pump head adapter
- A power flushing filter which is optional
Setting up Power flush
- The most important observation is identifying the radiators that are cold. Make a note of these radiators and also identify highly corroded radiators.
- Take a sample of the system water and check its TDS before flushing
- Switch off all electrical controls on the system and isolate it from electricity completely.
- Close all the air vents in the system manually
- Make sure that all the thermostatic radiator valves are either removed or set to maximum for best water flow.
- Where ever possible either bridge or bypass any anti-gravity valves to enable flow reversal. If they are not bridged or removed, it will prevent reversal and power flushing won’t be possible.
- Power flushing unit can be connected to the system at the circulator pump using a powerflow pump head adapter for optimal results.
- If this is not possible you can connect it directly to a radiator but keep this as the last option as this is not highly efficient.
Power flush process
- Open the water inlet and fill the system with fresh water after draining out the system.
- Switch on the pump and let the water circulate for 2-3 minutes.
- Add the cleaning chemical F5 and allow it to circulate for 15 minutes.
- Reverse the flow cycle every 5 minutes to improve the efficiency of the cleaning.
- Once this is done, isolate the radiator which you have already identified during the setup phase as the most corroded one.
- Circulate the water with cleaning solution in this radiator with flow reversal for few minutes and move on to the next radiator and so on.
- Additionally, you can vibrate the radiator by tapping it with your palm so that all the debris falls off and is collected by the flushing water.
- After few minutes dump the water from this radiator and repeat the process until the water exiting the pipes is totally clean of any debris.
- Repeat the same process for all the radiators one by one and then the complete system.
- This will ensure your heating system is completely free from any sludge or debris which enables consistent heat distribution in the system.
Once the power flushing is complete test the TDS of the new water in the system and if it’s not satisfactory, continue power flushing for few more minutes. Once it is completed remove the flushing machine and connect the circulator pump back on.