Wrong connection
Incorrect connection of pipes is one of the possible reasons for the decrease in the efficiency of the radiator. This is a gross mistake, experienced craftsmen do not allow such oversights, most often they occur after the work is done by amateurs.
Incorrect radiator installation
The pipe, which is intended for return, is connected to the upper branch pipe, the supply - to the lower one. As a result, a range of related problems arise:
- The circulation of water and the full operation of the heating system are completely disrupted.
- The efficiency of the radiator and its heat transfer are reduced, water is unable to completely fill all sections.
- The process of removing liquid from the battery is disrupted.
Water enters through the lower pipe, passes in a circle and leaves the radiator. Its sections do not warm up, the real efficiency is significantly reduced. The upper connection does not allow the liquid to be drained from the inside, because the design features of the radiator do not allow creating increased pressure for its withdrawal through the upper pipe.
Incorrect and correct connection
Once inside, hot water tries to immediately rise up, because it has a lower density than cold water. The coolant overcomes the shortest path, and the liquid does not move in the sections.
When properly connected, water enters from above and passes through the upper collector. The radiator has a lower pressure, the liquid flows into the columns and goes to the bottom. With this scheme, full heating of the battery is ensured.
How to fix a bad connection:
- Completely disconnect the pipes from the nozzles.
- Implement a fundamentally different scheme, given that the supply is carried out through the top pipe, and it must be connected from above, and the return from below.
- Connect the cells to the battery, open the supply and check the operation of the radiator.
Causes
One of the reasons for insufficient heating of the battery is pipe corrosion.
In fact, a sewer riser is a finicky thing. Therefore, there may be several reasons why the water supply risers turn out to be hot, although the radiator itself is cold. Consider the most common.
- The water supply valves are out of order, or simply blocked in the basement. Through this valve, water flows through the highway to the apartments. Therefore, since it is blocked there, it means that the heat does not go.
- There is an option in which the pipe was damaged during the welding of the riser to the main.
- It also happens that when installing the riser of the heating system in the pipe, the master left some kind of foreign object. Not infrequently, rags, mittens, sometimes even stones and animals were pulled out from there.
- An option with improper installation of heating pipes in other rooms, in the kitchen, because of which water does not enter the battery, but passes by.
- A small amount of coolant, that is, water, can pass through the water supply risers. This situation can apply to the whole house, or a separate entrance.
- It is possible that the water supply risers, like the entire heating system, were simply incorrectly adjusted, set up, which is why the required amount of water does not flow to the heating radiators in an apartment building.
Mistakes when installing a water heated floor. Myths.
The most common myth is that it is impossible to heat a building only with warm floors - you must install radiators. Because warm floors are not able to warm the building.
Mistake number 1.
In my opinion, the most gross mistake during the installation of any heating system is the lack of calculation of the heat loss of the building. When heat losses are not considered, it can be said that the heating system is done by eye.
Radiators are selected by eye, usually they are selected according to the size of the window or at the rate of 1 section per 10 square meters, if sectional radiators are used.Heated floors are made by eye. Or they mold radiators in rooms with warm floors “just in case”.
If you communicate with such an installer, drive him in the neck. As a result, you will either get a non-working system, or spend extra money on the construction of a heating system. Because the installer insured for your money and stuffed extra heating appliances.
Or vice versa - installed low-power thermal appliances. Either way, it's a loss.
Other reasons
A common reason is a reduced coolant flow rate. This problem can occur in several cases:
- Narrowed pipe section.
- The coolant moves at low speed directly in the heating system.
The low speed of the coolant occurs when the pump power is insufficient to circulate the fluid inside the system. Water cannot overcome the radiator with sufficient speed and go into the layer. A similar problem often occurs in gravity systems, they completely lack additional equipment.
The simplest gravity scheme
Pipe narrowing occurs in several cases:
- Incorrect soldering of polypropylene pipes.
- Problems arise when installing a control valve with a narrower section.
- The presence of deposits in the pipe, reducing the throughput.
Control valve
Another possible reason is the rather low temperature in the room. The cooling of the coolant in the radiator is faster, it gives off the maximum amount of energy. It is only natural that the bottom of the battery can be much colder.
Signs and causes of poor heating performance
| Characteristic features | Possible reasons |
|---|---|
| The riser is cold | Technical malfunctions outside the apartment |
| The riser is hot, the batteries are cold | Closed valves, clogging of the heating system |
| Cold bottom of radiator | The valves are not open enough, clogged radiators, low coolant pressure in the pipes |
| Cold top of batteries | Airlock |
| The last radiator in the system is cold | System out of adjustment, insufficient pressure |
| The part of the radiator farthest from the connection pipes is cold | Insufficient pressure, clogged battery, air lock |
An analysis of the events preceding their occurrence will help to identify the causes of malfunctions.
| Conducted work, features of operation | Possible malfunctions |
|---|---|
| Replacement of heating devices, pipes | Air lock due to air entering the system or changing pipe slopes. Clogged pipes and radiators. Reduction of flow sections due to errors during assembly of the system |
| The heating system works without maintenance for many years | Scale has formed, the heat transfer of the batteries has deteriorated, the parts of the shutoff valves have “been stuck” |
| Start of the heating season | The boiler house did not reach its design capacity, the employees of the relevant services forgot to open the valves, while filling the system, air jams formed. |
| Neighbors are renovating | Reduced pressure in the system due to unprofessional actions of neighbors |
First of all, in case of poor heating, interview the residents of the house. If they have the same problem, it means that the boiler room does not work well or the valves in the basement of the house are closed. In these cases, you should contact the management company together. If it is cold in only one apartment, check if the valves are open, if there are any air pockets. Call a specialist through the dispatcher of the organization serving the house.
How to make radiators hot - looking for solutions
If it is found that the return is too cold, a series of troubleshooting steps should be taken. First of all, you need to check the correct connection. If the connection is not made correctly, the downpipe will be hot, but should be slightly warm. Pipes should be connected according to the diagram.
In order to avoid air locks that impede the advancement of the coolant, it is necessary to provide for the installation of a Mayevsky crane or a bleeder for air removal. Before venting, turn off the supply, open the tap and let the air out. Then the tap is closed, and the heating valves open.
Often the reason for the cold return is the control valve: the cross section is narrowed. In this case, the crane must be dismantled and the cross section increased using a special tool. But it is better to buy a new faucet and replace it.
The reason may be clogged pipes. It is necessary to check them for patency, remove dirt, deposits, clean well. If patency cannot be restored, clogged areas should be replaced with new ones.
If the speed of the coolant is insufficient, it is necessary to check whether there is a circulation pump and whether it meets the power requirements. If it is missing, it is advisable to install it, and if there is a lack of power, replace or upgrade it.
Knowing the reasons why heating may not work effectively, you can independently identify and eliminate malfunctions. The comfort in the house during the cold season depends on the quality of heating. If you do the installation and testing of the heating system yourself, you can save on hiring third-party labor.
Quite often, in residential apartment buildings during the heating season, you may encounter the following problem: the riser is hot, and the batteries are cold. This applies to both new buildings and old houses. Residents in most cases do not know how to deal with such a situation. That is why their attempts to repair the heating system on their own do not lead to the desired result. In this matter, you definitely need help or advice from a specialist. After all, only a person with the necessary knowledge and experience can solve the problem of why the pipes are hot and the batteries are cold.
Causes of return problems in batteries of a private or apartment building
There are several reasons why the return flow is not warm enough or even cold at all. Common problems are:
- insufficient water pressure in the system;
- a small section of the pipe through which the coolant passes;
- incorrect installation;
- air pollution or contamination of the system.
If a problem with a cold return has arisen in an apartment, then the first thing you should pay attention to is pressure. This is especially true for rooms on the upper floors.
The fact is that the principle of the return flow is to quickly and continuously run the liquid through the system. And if its speed drops, then the coolant will not have time to push out cold water and the batteries do not heat up.
Another reason for the malfunction of the return flow is pollution of the heating circuit. As a rule, major cleaning of systems in multi-storey buildings is not carried out often. Sediment, which accumulates over time on the walls of the pipes, prevents the passage of fluid.
The main reason for interruptions in the operation of the heating system in a private house is improper installation. Most often this happens when the installation is carried out without the participation of specialists. Being incompetent in this matter, it is quite easy to mix up the supply and return pipes, or choose pipes of the wrong size.
Both in an apartment and in a private house, the problem of a malfunction of the heating system can be associated with insufficient water supply rate or airiness. In a similar way, the work of the return is affected by the contamination of the pipes.
Troubleshooting methods. Why is cleaning necessary?
To understand exactly how to solve the problem, you first need to establish its source. If the batteries become cold due to insufficiently fast water circulation, the installation of a special pump will help in this case.It will regularly push water into the circuit under a certain pressure, thereby not allowing the system to stop or slow down.
Photo 2. Marking the Grundfos circulation pump allows you to choose the most suitable one and install it correctly.
If the cause is clogged pipes, then they just need to be cleaned. You can do this in several ways:
- using a water-pulsing mixture;
- with the help of biological products;
- by means of a pneumatic hammer.
Important! Such cleaning is carried out regularly in order to prevent the appearance of new problems. In the event of a malfunction due to improper installation of the equipment, contact the wizard
A qualified specialist will certainly understand the problem and fix all the problems. In addition, he will give practical advice and recommendations for the care and operation of the system.
In the event of a malfunction due to improper installation of the equipment, contact the wizard. A qualified specialist will certainly understand the problem and fix all the problems. In addition, he will give practical advice and recommendations for the care and operation of the system.
Consequences of a cold return
Scheme for heating the return
Sometimes, with an incorrectly designed project, the return flow in the heating system is cold. As practice shows, that the room does not receive enough heat during a cold return, this is still half the trouble. The fact is that at different supply and return temperatures, condensate can form on the walls of the boiler, which, when interacting with carbon dioxide released during the combustion of fuel, forms acid. She then can disable the boiler much ahead of time.
To avoid this, it is necessary to carefully consider the design of the heating system, special attention must be paid to such a nuance as the return temperature. Or include additional devices in the system, for example, a circulation pump or a boiler, which will compensate for the loss of warm water
Radiator connection options
Now we can more than confidently say that when designing a heating system, the supply and return must be ideally thought out and configured. With the wrong design you can lose more than 50% percent of the heat
.
There are three options for inserting a radiator into a heating system:
- Diagonal.
- Lateral.
- Lower.
The diagonal system gives the highest efficiency and is therefore more practical and efficient.
The diagram shows a diagonal inset
How to regulate the temperature in the heating system?
In order to adjust the radiator temperature and reduce the difference between the flow and return temperatures, a heating system temperature controller can be used.
When installing this device, do not forget about the jumper, which must be in front of the heater. In the absence of it, you will regulate the temperature of the batteries not only in your room, but throughout the riser. It is unlikely that the neighbors will be delighted with such actions.
The simplest and cheapest version of the regulator is the installation of three valves: on the supply, on the return and on the jumper. If you cover the valves on the radiator, the jumper must be open.
There is a huge abundance of different thermostats that can be used in apartment buildings and private homes. Among the wide variety, each consumer can choose for himself a regulator that will suit him in terms of physical parameters and, of course, in terms of cost.
Infrared film heating - pros and cons
Safety valve in the heating system
What to do if the batteries in the apartment are cold and the riser is hot
Regardless of whether cold heating equipment is only in the riser or in the whole entrance, and possibly completely in the house, you need to seek help from qualified specialists.In the case of an apartment building, this is the plumber of the company responsible for heating the house.
Cold batteries with a hot riser may be due to clogging of the system or the formation of an air lock in it. An important factor is the pressure in the wiring. In some cases, the problem of low coolant flow is relevant. It is possible to independently find out the reason for the low efficiency of the heating elements. But only a true professional in his field will unequivocally answer the questions that have arisen and competently eliminate the breakdown. How to make heating radiators better to heat will help the video:
This article lists the main malfunctions that can happen to the heating system of a private house, as well as ways to fix them. Troubleshooting the heating system can be divided into two types. Do-it-yourself heating system repair
can be made in terms of wiring the heating system: radiators and fittings. All problems that occur in the boiler room and equipment require special knowledge and experience, therefore heating system repair
related to equipment, it is better to entrust specialists.
Those questions that the owner of the house can solve himself are listed below.
Reason 1. Lack of thermal insulation
The most common reason why a warm floor does not cope with the functions assigned to it is that you simply forgot to properly install thermal insulation, or did not install it at all. Often, a conventional polyethylene foam substrate is used as thermal insulation. And the substrate is simply not intended for thermal insulation of warm floors. Instead, you need to use polystyrene foam 5-10 cm thick.
How to fix?
Learn one thing. You will have to pay extra for a warm floor. But perhaps the situation will be corrected by a higher temperature supply to the warm floor and the use of more powerful heating equipment. But don't overdo it. The maximum temperature should not exceed 70 degrees. And it doesn't have to be permanent. Otherwise, the pipe will quickly become unusable.
Battery does not heat up
If one or more radiators do not heat or heat poorly, then the first step is to check if there is air in them using air vents. If water comes out of the drains, and the radiator still does not heat, then you need to make sure that both taps of this radiator are open (such inattention can often occur). The next step is to check if the radiator is clogged. To do this, other heating radiators that heat and are on the same branch as the idle one must be shut off so that all the water goes through this radiator. If he began to warm, then he is not clogged. In this case, it is necessary to carry out hydraulic alignment of the branch. In simple terms, it is necessary to cover the rest of the radiators on the branch, so that the non-working one gets more. You need to be prepared that the alignment will take more than one day, because the heating system may be slow to respond to changes in settings. If the valves in front of the radiator are fully open and it is cold, then it is clogged (extremely low probability). Basically, the last radiators on the branch may not heat up. But this can always be eliminated by hydraulic leveling. If someone tells you that “it doesn’t pump there” or “insufficient pump power”, do not rush to believe and touch the pump or pipes. In order for the pump to “not pump up” it is necessary to “try hard” when installing the heating system. If one or more of the last radiators do not heat even after working with taps, then there may be an air lock in the pipes (see violation of circulation in the heating system).
This is interesting: Why does the pressure drop in the heating system, in the gas boiler - what should be the reasons?
What problems arise in the apartment due to the cold return
Violation in the work of the return line entails certain problems and troubles.
Firstly, the batteries in this case do not heat up properly, or even do not work at all. Accordingly, it becomes cold in the room itself, which certainly does not please.
Secondly, in case of violations of the functionality of the return flow, a strong dissonance in the temperatures of the supply and removal of liquid occurs.
This entails the accumulation of condensate on the walls of the boiler, which begins to react with carbon dioxide released from the combustion of fuel. The consequence of this process is the formation of acid, which corrodes the walls of the boiler, thereby destroying it.
Alas, the weather in the house does not depend only on our mood. The creation of the necessary, comfortable microclimate is provided by heating radiators, that is, batteries. Inside them, a stream of hot water passes, which heats the device, thereby ensuring the flow of heat in the premises. Unfortunately, the sewer riser is not checked by the apartment owners as often as they should be. In a panic that the heating riser is hot, and the batteries themselves are completely cold, we begin to take certain actions. Often without any result.
So, for starters, you should stop panicking, and seriously address the problem. The heating season has begun, you will already have to pay for heat, even if it has not reached your apartment for one reason or another. In order not to pay for cold batteries, you need to check the water supply risers, check how the sewer works, make sure that heating has really started in your apartment building, and only you have some problems with this.
Actually, the primary task is to understand the reasons. It is they who will make it possible to understand why the water supply risers are hot, and the battery itself is cold. Already from here it will be possible to move further, in the direction of solving the problem that has arisen. Some situations even provide for such a scenario in which radiators will have to be changed. But, let's hope, this will not come to that, and the issue can be solved by simpler and less drastic methods.
- 1 Reasons
- 2 Troubleshooting
2.1 Causes and their elimination
- 2.1.1 Air pockets
- 2.1.2 Replacing radiators
Why the batteries are cold and the riser is hot, experts explain
On cold batteries, do not warm your hands.
There can be a lot of reasons why the coolant supply pipe is hot and the radiator is cold. Specialists for general development name only the main ones:
- the central tap on the heat supply line is closed or the return line is closed;
- insufficient coolant flow;
- airing the system or a specific riser, radiator;
- the heating system is not balanced;
- pollution in the heating circuit;
- reduction in the cross section of the heat carrier supply pipe.
However, the following actions of the residents of the house will help the craftsmen who came to the call to quickly eliminate the malfunction of the heating circuit:
- it is necessary to install a hot pipe, and the radiator is cold in only one apartment, or this problem affects the entire riser. Perhaps the heating wiring of the entire entrance is faulty;
- does not interfere with going around all the entrances and seeing if the heating elements are hot there;
- you can go down to the basement and inspect the pipes for breakdown. Even a drip leak leads to a fall
. This adversely affects her work.
Circuit cleaner.
If the batteries do not heat up the riser
.
If the riser is cold, the battery is cold - this is a sure sign that the main line through which the coolant flows is blocked. In confirmation of this, you need to walk through the neighboring apartments. They should warm up well. In this case, only a plumber can fix the breakdown, who will have drawings of the house heating wiring in his hands.
The next state of affairs, when the pipe is hot and the battery is cold, indicates a blockage in the system or the presence of an air lock.It prevents the penetration of the coolant into the heating element. From this, the latter does not warm up. Blockages are eliminated only if the radiator is completely disassembled and air under pressure is driven through it. This can only be done by a specialist who has the necessary tools and equipment.
If the radiators in the entire entrance do not heat
.
When the radiator is cold and the riser is hot, you need to pay attention to the pressure in the circuit. With insufficient pressure, the coolant cannot pass through all the radiators in the circuit
As a result, the batteries lower their temperature as they move away from the heat-carrying main. Residents of the house are not able to increase the pressure in the system on their own, and therefore it is recommended to seek help from professionals. More specifically, call the organization that is responsible for the heat supply of the building.
Supply and return can be interchanged.
Residents of a new house, when the heating system is first started, can observe the following situation when the battery is cold and the return is hot. Here it is appropriate to assume that errors were made during the installation of the heating elements. In this case, the pipes supplying the coolant and the return flow of the circuit are reversed. If we are talking about an individual heating circuit, then you should look at the circulation pump. It may not have been installed correctly.
When asked why there is a cold return in batteries, experts unequivocally point to an improperly designed heating system. In some cases, it is appropriate to talk about a small coolant flow rate.
The main malfunctions of heating systems and their elimination
Air locks
Air locks occur in radiators, pipes and interfere with the normal circulation of water in the heating system. They appear for various reasons:
- violation of the technology of filling the system with water after the summer period;
- non-compliance with the mode of deaeration of water;
- repair with disassembly of pipelines;
- non-observance of slopes during the installation of the heating system;
- air leaks through leaky joints.
To remove air from the system, a Mayevsky crane is used, mounted on a radiator. You should open it, wait until the air comes out, the hissing stops, the water begins to pour out calmly without bubbles. After that, the valve is closed. Do not forget to substitute a container for draining water or a towel.
There are no Mayevsky cranes in old cast-iron batteries. The air is released without completely unscrewing the plugs at the ends of the radiators. It is better to entrust this operation to plumbers - if you unscrew the plug completely, you can flood the apartment.
The heating system is a complex structure consisting of several elements combined into one circuit and is put into operation through a chain reaction.
But it happens that the system fails and the water in the batteries becomes cold. The reason for this may be problems with the return.
where they pass, the temperature difference between them, the pressure on the radiators
The comfort of the family in the winter will depend on how efficiently the heating system works in the house.
If the batteries do not heat up well, it is necessary to fix the problem, and for this it is important to know how the heating works in general
Water space heating is a source of heat and a coolant that is distributed through the batteries. Supply and return is present in one- and two-pipe systems. In the second, there is no clear distribution, it is conventionally customary to divide the pipe in half.
Odnoklassniki
Features of supply in the heating system
The heat supply comes immediately from the boiler, while the liquid is carried through the batteries from the main element - the boiler (or the central system). It is typical for a one-pipe system. If it is improved, then it is possible to insert pipes also on the return line.
Photo 1. Heating scheme for a private two-story house, indicating supply and return pipes.
Where is the return
In short, the heating circuit consists of several important elements: a heating boiler, batteries and an expansion tank. In order for heat to flow through the radiators, a coolant is needed: water or antifreeze. With proper construction of the circuit, the coolant is heated in the boiler, rises through the pipes, increasing its volume, and all the excess enters the expansion tank.
Based on the fact that the batteries are filled with liquid, hot water displaces cold water, which, in turn, enters the boiler again for subsequent
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