The Best Way To Clean Your Electric Tankless Water Heater
Your tankless water heater is expected to have more than 20 years of service life. All the same, it is recommended that it should be cleaned and flushed out at least once a year. This is to remove the mineral deposit, which is often referred to as ‘scales’ from inside the heater. The efficiency of the water heater is drastically affected by the accumulation of scales.
The tankless water heater cleaning can be done at home. But make sure that you read the manufacturer’s manual carefully. It will provide you with the needed instructions and precautions.
Get your flushing equipments ready. The flushing kit is readily available in the market. But the kit comprises the things available in most homes. You should have a 5 gallon bucket, two hoses, a submersible pump and about 4 gallons of food grade white vinegar. As the water from the heater is used for domestic purposes and bathing, using chemicals for flushing water heater should be avoided.
The obvious first step is to close up the gas or electricity connection, while working on your tankless water heater. The input, output and main water connections should be closed.
Now you are ready to clean your tankless water heater. Remove the purge post caps slowly and carefully to relieve the pressure inside the water heater. You can do it also by opening a hot water out let in your house for some time.
When the pressure is down, it is now time to drain the service valves. Attach the hose to the cold water valve and drain the water into the bucket. Repeat the same with the hot water valve. When you have freed the valves of any water flow, you are ready to start the flushing job.
Pour the vinegar into the bucket. Attach one end of the hose tightly to the submersible pump and the other end to the cold water input portal. Connect one end of the second hose to the hot water outlet, with its loose end inside the bucket. Once again check if all the connections are intact. Then place the sump pump into the bucket and plug it in.
As soon as the sump pump is plugged in, it will pump vinegar into the water heater, letting the flush come out through the hot water output portal and into the bucket. The circulation of vinegar should be kept going at least for 20 to 30 minutes. By that time the inside of your water heater would have been rid of any mineral deposit.
Cleaning the air intake filter
Cleaning your tankless water heater is not only cleaning the water tank but also cleaning the air-intake filter. This filter will be clogged with dirt in due course. It is compulsory to clean it to have a hassle–free air intake filtering system for your water heater.
This device is lodged inside the water heater. In order to access it, you have to remove the face plate of the water heater. The faceplate is held by four screws. All you have to do is to remove the screw and lift the plate upwards in order to unhook it from the top.
You can see the air intake filter, screwed on with a single screw. Detach the filter and hold it under a tap, running water on it full force. Dry it with a towel and replace it. Re-screw the faceplate on.
After the vinegar flush is complete, remove the hose from the cold water inflow portal and replace the service valve firmly. Now open the cold water inflow for a few minutes maintaining the outflow through the hose connected to the hot water out let. This is to remove all traces of vinegar from inside the water heater.
Cleaning the water filter on your heater
Your tankless water heater service is complete, when you have cleaned both the water filters, the hot water and cold water. Check them for dirt and debris. Rinse them thoroughly and replace.
There! You have cleaned your tankless water heater and it is ready for efficient service for another year. Now make sure all the things you have disconnected or removed are replaced correctly and tightly before plugging in your water heater and switching it on.