How to clean scale from wall-hung boiler
As a common heating equipment in modern homes, wall-mounted boilers are prone to scale after long-term use, affecting thermal efficiency and even damaging the equipment. This article will detail the steps, precautions and relevant data for cleaning scale to help you maintain your wall-hung boiler efficiently.
1. Causes and hazards of scale formation
The scale inside the wall-hung boiler is mainly formed by the crystallization and deposition of calcium and magnesium ions in the water at high temperatures. Long-term accumulation can lead to the following problems:
| Hazard type | Specific performance |
|---|---|
| Thermal efficiency decreases | Scale has poor thermal conductivity, causing energy consumption to increase by 10%-20% |
| Shortened equipment life | Scale corrodes pipes and may cause water leakage or component damage. |
| Increased operating noise | Scale blockage leads to sluggish water flow and abnormal noises |
2. Steps to clean up scale
The following is the detailed operation process for cleaning the scale of the wall-mounted boiler:
| steps | Operation content | Things to note |
|---|---|---|
| 1. Turn off the power and water supply | Cut off the power supply to the wall-hung boiler and close the water inlet valve | Ensure safety and prevent electric shock or water leakage |
| 2. Drainage | Open the drain valve and drain the water from the system | Prepare containers to collect water to avoid getting the ground wet |
| 3. Disassemble the cleaning parts | Remove parts that are prone to scale accumulation, such as heat exchangers and water pumps. | Record the disassembly sequence to facilitate subsequent installation |
| 4. Prepare cleaning solution | Use special descaling agent or citric acid solution (ratio 1:10) | Avoid using strong acids, which corrode metal parts |
| 5. Soaking and cleaning | Soak the parts in the solution for 2-3 hours | Stubborn scale can be cleaned with a soft brush |
| 6. Flush installation | Rinse with clean water, dry, and reinstall | Make sure the sealing ring is intact to prevent water leakage |
| 7. Fill the system with water | Open the water inlet valve, remove the air and then turn on the power to test | Check the pressure gauge and maintain it at 1-1.5Bar |
3. Recommendations for cleaning frequency
Depending on water quality and usage, the recommended cleaning cycles are as follows:
| Water quality type | Recommended cleaning cycle | Additional suggestions |
|---|---|---|
| Soft water (hardness <120mg/L) | every 2-3 years | Water softener can be installed to extend the cycle |
| Medium hardness water (120-180mg/L) | 1 time per year | Regularly check pressure gauge changes |
| High hardness water (>180mg/L) | every 6 months | It is recommended to install a magnetized descaling device |
4. Frequently Asked Questions
Q: Can vinegar be used instead of professional descaler?
A: You can use white vinegar temporarily (it needs to be diluted), but the effect is not as good as a special descaler and the smell may remain.
Q: What should I do if the wall-hung boiler becomes noisier after cleaning?
A: There may be air in the system and it needs to be re-exhausted; if it persists, it is recommended to contact after-sales service to check the water pump.
Q: Will cleaning it myself affect the warranty?
A: Most brands allow users to perform basic maintenance, but disassembly of core components may require professional operations.
5. Tips to prevent scale
1. Install a pre-filter to reduce the entry of impurities
2. Empty the water after the heating season.
3. Keep the system pressure stable and avoid frequent replenishment of water.
4. Consider installing an electronic scale inhibitor
With regular cleaning and maintenance, your boiler will not only keep running efficiently but also have a longer lifespan. If you are not sure about cleaning it yourself, it is recommended to contact professional service personnel.
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