How to drain water when the floor heating is not hot: comprehensive analysis and operation guide
Underfloor heating is one of the common problems in winter, and draining water is a key step to solve this problem. This article will provide you with structured data and explain in detail the possible reasons why the floor heating is not hot and how to drain the water.
1. Common reasons why floor heating is not hot
| Reason | Description |
|---|---|
| There is air in the pipe | Air blockage causes poor hot water circulation |
| Insufficient water pressure | System pressure is lower than normal operating value |
| filter clogged | Accumulation of impurities affects water flow |
| Water distributor failure | Valve is damaged or improperly adjusted |
| Pipe scaling | Scale formation due to long-term use |
2. Methods to determine whether water needs to be drained
| Check items | normal state | abnormal behavior |
|---|---|---|
| Pipe temperature | Evenly warm | Some pipes are cold |
| system pressure | 1.5-2bar | Below 1bar |
| The sound of water flowing | almost silent | Distinct grunting |
3. Detailed steps for draining floor heating
1.Preparation: Turn off the power to the floor heating system and prepare a water container, wrench and towel.
2.Close main valve: Find the main water inlet valve and return valve on the water distributor and close them.
3.Connect drain pipe: Connect the hose to the drain port of the water distributor and put the other end into the container.
4.Release water step by step: Operate in the following order:
| steps | Operation |
|---|---|
| first step | Open the first water diverting valve |
| Step 2 | Open the drain valve to release water |
| Step 3 | Observe the water until it becomes clear |
| Step 4 | Close this valve |
| Step 5 | Repeat for other paths |
5.Exhaust operation: Open the exhaust valve at the highest point of the system until clean water is discharged without bubbles.
6.Restore system: Close all drain valves, open the main valve, check the pressure and add water to normal value.
4. Precautions
| Things to note | Description |
|---|---|
| water temperature control | When draining water, the water temperature should be lower than 50℃ |
| pressure monitoring | After draining the water, it needs to be replenished to 1.5bar. |
| Regular maintenance | It is recommended to have it professionally cleaned every 2 years |
| Security protection | Prevent burns and water leakage |
5. Other solutions
If the water is still not hot after you put it in, try the following methods:
| method | Operation |
|---|---|
| Clean filter | Disassemble Y-type filter for cleaning |
| Adjust the water distributor | Balance the flow of each circuit |
| Check thermostat | Confirm that the set temperature is correct |
| Professional cleaning | Use pulse or chemical cleaning |
6. Frequently Asked Questions
| question | Answer |
|---|---|
| Water release frequency | Once a year before heating |
| Amount of water released | About 2-3 liters per way |
| Abnormal water color | Black needs professional cleaning |
| Water release is invalid | It is recommended to contact professionals |
With the above structured data and detailed steps, you should be able to effectively solve the problem of underfloor heating not being hot. If the problem persists, it is recommended to contact a professional floor heating repairman for inspection and maintenance.
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