How to deflate a wall-hung boiler: detailed steps and FAQs
As a common heating equipment in modern homes, wall-mounted boilers require regular maintenance for their normal operation. Among them, "bleeding" is a key operation to solve the problem of not getting hot. This article will combine hot topics on the Internet in the past 10 days (such as winter heating issues, home appliance maintenance tips, etc.) to provide you with a detailed analysis of the correct method for deflating a wall-mounted boiler.
1. Why should we vent the wall-hung boiler?
When the wall-hung boiler or radiator encounters the following conditions, you need to consider venting:
| phenomenon | Reason |
|---|---|
| The radiator is not hot locally | Air accumulation in pipes blocks hot water circulation |
| Wall-hung boiler starts and stops frequently | Air causes system pressure instability |
| Abnormal noise in the pipeline (such as water hammer) | Mixing of air and water creates noise |
2. Preparation of deflation tools
| Tool name | Purpose |
|---|---|
| Slotted screwdriver | Open the radiator exhaust valve |
| Water container | Receive a small amount of water discharged |
| dry towel | Wipe up water spills |
3. Step-by-step operation guide
Step 1: Check System Pressure
Make sure the wall-hung boiler pressure gauge shows 1-1.5Bar (lower than 1Bar, water needs to be replenished first).
Step 2: Turn off the power supply to the wall-hung boiler
For safety reasons, cut off the power supply and wait for the system to cool down before operation.
Step 3: Start exhausting from the highest point
| location | How to operate |
|---|---|
| radiator | Use a screwdriver to turn the exhaust valve counterclockwise 45 degrees |
| Wall mounted boiler built-in exhaust valve | (Please refer to the instruction manual for location) |
Step 4: Observe the exhaust status
When the exhaust valve discharges a continuous flow of water (no air bubbles), close the valve immediately.
Step 5: Restore system operation
Restart the wall-hung boiler and check whether the pressure is normal (it is recommended to increase it to 1.2Bar).
4. Answers to popular questions (highly searched questions in the past 10 days)
| question | solution |
|---|---|
| The pressure drops too quickly after deflation | Check whether the pipes are leaking or the exhaust valve is not closed tightly |
| Exhaust valve cannot be tightened | Spray WD-40 to lubricate, do not force the operation |
| Still not hot after repeated exhausting | Possible cause of water pump failure or pipe blockage |
5. Safety precautions
1. The water temperature should not exceed 50℃ when deflating to prevent burns.
2. If the wall-mounted boiler frequently needs to be deflated, it is recommended to contact a professional to check the sealing
3. The system should be vented once a year before the heating season.
Through the above structured operation guide, users can quickly solve the problem of air blockage in wall-hung boilers. According to recent data from a home appliance repair platform, 90% of heating abnormalities can be solved by properly deflating the air. If the problem persists, it is recommended to use professional services (such as JD.com service, 58 Daojia and other popular platform reservations).
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