What is an elevator assembly of a heating system? Scheme of the elevator node of the heating system in an apartment building.

The heat supply systems currently used consist of main pipelines and heat points, through which heat is distributed to consumers. Any apartment building is equipped with a special heating unit, which regulates the pressure and temperature of the water. Special devices called elevator nodes are designed to cope with this task.

The elevator unit is a module with the help of which any apartment building is connected to a common heating network. The coolant often has a temperature that exceeds the allowable limits. Strongly heated water should not flow into apartment radiators. Elevator nodes are used to cool water in the heating systems of houses.

These modules lower the temperature of the coolant entering the basements of the houses from the external heating network by adding water from the return pipe to it. Elevators are the most simple options cooling of heat carriers in residential buildings.

The device and principle of operation of the heating elevator

The elevator of the heating system consists of three main elements:

• mixing chamber;
• nozzle;
• jet elevator.

Additionally, the design of the device provides for various thermometers with pressure gauges. Elevators are also equipped with shut-off valves.

The elevator is a device made of cast iron or steel. The device is equipped with three flanges. The principle of its work is as follows:

• warmed up to high temperatures water moves to the elevator and enters its nozzle;
• there is an increase in the flow rate of the coolant with a narrowing nozzle and a decrease in pressure;
• in the place where low pressure has arisen, cold water flows from the return pipeline;
• both liquids (cold and hot) are mixed in mixing unit elevator.

Thanks to the cold water coming from the return pipe, the total pressure in the heating system is reduced. The temperature of the coolant drops to the desired value, after which it is distributed among the apartments of a residential building.

By its structure elevator unit is a device that simultaneously performs the functions of both a mixer and a circulation pump.

The main advantages of the design are:

• low cost of installation in apartment buildings;
• simplicity of the installation itself;
• savings in the used coolant, reaching 30%;
• energy independence of this equipment.

Any elevator assembly requires strapping. Heated water moves along the main through the supply pipeline. Her return occurs through the return pipeline. From the main pipes, the internal system of the house can be turned off thanks to the valves. Elements thermal node are attached to each other with a flange connection.

Scheme of the elevator of the heating system

At the entrance to the system, as well as at its exit, special mud collectors are fixed. Their function is to collect solid particles that enter the coolant. Thanks to the mud collectors, particles do not penetrate further into the heating system, settling in them. Direct and oblique types of mud collectors are used. These elements need to be cleaned from the accumulated sediments in them.

Manometers are a must. Data control devices perform the function of regulating the pressure indicators of the coolant inside the pipes.

When it enters the heating system control unit, the coolant can have a pressure of up to 12 atmospheres. At the outlet of the elevator, the pressure is significantly reduced. Its indicator depends on the number of floors in apartment building.

The system includes thermometers that regulate the temperature of the inline fluid.

Installation of the elevator itself provides special rules mounting:

• the presence in the system of a free straight section 25 cm long;
• using the inlet pipe, the device is connected to the supply pipe from the central (connection occurs through a flange);
• with a branch pipe on the opposite side, the elevator is connected to a pipe, which is part of the house wiring;
• the elevator assembly together with the flange is connected to the return pipe using a jumper.

Any intra-house heating structure implies the presence of valves and drainage elements. Gate valves allow you to disconnect the elevator from the internal heating network, and draining elements drain the coolant from the system. This usually happens as part of a planned preventive measures or in case of accidents on heating systems.

Elevator with automatic adjustment

Two main types of elevator nodes are used:

• without adjustment;
• devices with automatic control.

The second type of devices has its own characteristics of operation. Their design allows electronic methods regulation to change the cross section of the nozzle. Inside such an element there is a special mechanism by which the throttle needle moves.

The throttle needle affects the nozzle and changes its clearance. As a result of changing the lumen of the nozzle, the indicators of coolant consumption change significantly.

Changing the lumen not only affects the fluid flow inside heating pipes, but also on the speed of its movement. All this is the result of a change in the coefficient at which mixing occurs. cold water from the return pipeline and hot water flowing through the external main pipe. This is how the temperature of the coolant changes.

By means of the elevator, not only the supply of fluid is regulated, but also its pressure. The pressure of the device itself directs the flow of coolant in the heating circuit.

Since the elevator is partly a circulation pump, switchgears successfully fit into its design. This is necessary in high-rise buildings, where several consumers live at once.

The main switchgear is a collector or comb. The coolant leaving the elevator assembly enters this container. The liquid leaves the comb through many exits, being distributed among the apartments of the house. In this case, the pressure in the system remains unchanged.

It is possible to repair individual consumers without having to stop the entire heating circuit.

Using a three-way valve

As switchgear a three-way valve is used. The mechanism is capable of operating in several modes:

• permanent;
• variable.

Valves are cast iron, brass, steel. Inside it has locking device cylindrical, ball or cone type. In its shape, the valve resembles a tee. Working in the heating system, it performs the functions of a mixer.

Ball type valves are more commonly used. Their purpose is to:

• temperature control of radiators;
• temperature control inside underfloor heating;
• the direction of the coolant in two directions.

Three-way valves included in the elevator assembly are divided into two types - control, shut-off. Both types are largely similar in functionality, but the second type is more difficult to cope with the task of smoothly adjusting the temperature regime.

The main malfunctions of elevators

Among the advantages of the device, there are several of its disadvantages, including:

• a strong pressure drop is not allowed, which occurs in two pipes (supply and return);
• the allowable rate of pressure drop is 2 bar;
• the device does not allow to regulate the temperature of the coolant at the outlet of the system;
• each element of the elevator assembly needs to make calculations, without which the accuracy of their work is impossible.

Among the frequent cases of malfunctions occurring with these devices are:

• clogging of mud tanks;
• blockage of all equipment;
• valve failure;
• an increase in the diameter of the nozzle, which occurs over time and makes it difficult to adjust the water temperature in the heating pipes;
• regulator failure.

One example of a clogged sump

Common causes of malfunctions are various blockages in the equipment and a nozzle increasing in diameter. Any malfunction quickly makes itself felt by a failure in the operation of the node. There is a sharp temperature drop in the coolant in the system. A serious difference is a change in temperature by 5 0 C. In such cases, diagnostics of the structure and its repair are required.

The nozzle increases in diameter for two main reasons:

• due to involuntary drilling;
• due to corrosion resulting from constant contact with water.

The problem leads to an imbalance in the system and temperature regulation in it. Repair work must be carried out as soon as possible.

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As you know, heating is indispensable system for absolutely any living space. However, not all owners know that mechanisms such as elevator units of the heating system are very important components of all heat supply systems. This equipment plays important role in the process of heating the coolant, therefore, it is necessary to consider in more detail what an elevator heating unit is, as well as some of its characteristics and properties.

The principle of the elevator heating unit

The elevator heating unit is a special mechanism that serves to provide all heating system coolant and for its proper distribution throughout the room. The principle of its operation is as follows: to a specific room going hot water as a source of heating, and at the outlet it comes out already moderately chilled.

To equip such a unit, it is necessary, first of all, to have the following elements:

• piping system responsible for supply. In this section, the coolant enters the right room;
• outlet pipes. Here, already chilled water is discharged, which is returned back to the boiler room.

For several houses, it is customary to create special heat chambers in which not only hot water is distributed between buildings, but also special fittings are installed that cut off pipelines. In addition, such chambers are usually equipped with special drainage mechanisms designed to empty pipes, for example, during repair work. All subsequent measures directly depend on what temperature the coolant has (read: "").

In domestic heating systems, there are several main modes in which boiler rooms operate:

• feed with a parameter of 150° and return equal to 70°;
• the same characteristics with indicators of 130° and 70° respectively;
• another option is 95° and 70°.

The mode in which the boiler room operates depends, first of all, on the climatic conditions in a particular region. This means that 130°/70° will be fine for cooler areas, while 150°/70° will be needed for more severe climates.

These modes should be taken into account so that the room does not overheat too much and you can stay in it without experiencing any inconvenience.

It should also be noted that the boiler units are most efficient if they operate at the maximum degree of load. The coolant supplied to a particular residential area is subsequently regulated by means of such a mechanism as an elevator thermal unit.

This element consists of the following functional parts:

• temperature sensor that displays the parameters of outdoor and indoor air;
• servo;
• actuating system equipped with a valve.

Such devices are usually equipped with special devices, taking into account thermal energy in each specific room. Thanks to this, it becomes possible to save a significant part of the financial resources. Comparing the elevator in the heating system and similar improved mechanisms, it is worth saying that the latter are more reliable and have a longer service life.

In this case, if the temperature of the heat carrier does not exceed the parameter of 95 °, then the main work is the correct distribution of thermal energy throughout the system. Devices serving for these purposes are balancing valves and manifolds.

If the temperature exceeds the above figure, then it should be reduced. It is this function that the heating system elevator performs, which supplies chilled water from the return pipeline to the supply pipeline. It is not at all difficult to adjust such a mechanism, but for this it is very important to perform a competent calculation of the heating elevator.

Functional characteristics of the elevator heating unit

As mentioned above, the scheme of a thermal unit with an elevator provides for the cooling of a hot heat carrier to a predetermined value, after which this water enters heating radiators in residential premises.

The two main functions that this mechanism performs in the heating system are as follows:

• mixer function;
• circulation function.

In addition, this equipment has several undeniable merits, among which:

• no problems with installation due to the simplicity of the design;
• high performance indicators;
• no need to connect to the electrical network.

However, such mechanisms also have some negative sides, among which are the following:

• the need for high-precision calculation and selection of equipment;
• the inability to control the temperature of the water during its withdrawal;
• in addition, the scheme of the elevator heating unit provides for the need to observe the pressure difference between the return and supply of the heat source (more: "").

Today, such designs are widely used among utility-type networks due to the fact that these devices tolerate any unforeseen changes in temperature and hydraulics well. Moreover, their normal functioning does not require the constant presence of a person.

The heating elevator circuit should not be calculated independently, it would be much more correct to entrust this work to qualified craftsmen, since any error in the calculations or when connecting can cause unpleasant and even dangerous consequences. If you wish, you can study various photo and video materials that describe in detail the entire installation process in order to better navigate the principle of operation of such equipment in the future. See also: "".

Due to the fact that modern technologies are constantly developing, heating systems are constantly equipped with new mechanisms that can improve heating performance. It is worth noting that today there are devices that can provide worthy competition to standard heating units - these are devices equipped with automatic temperature control.

Due to this property, they increase the efficiency of energy consumption, but the cost of such units is still higher. It is worth noting that these devices cannot function without electricity, while at times the power must be very large.

It is not yet possible to say which samples are better, since these mechanisms are innovative and they appeared on the market quite recently, however, it can be said with certainty that they have already firmly entered into modern system heat supply and are increasingly used in residential buildings.

Hello! Internal heating systems mean a group of devices that carry out work on the supply of heat. They include equipment: radiators, control devices, metering and control devices, shut-off and control valves, filters, etc.

These systems are divided into:

- by type of coolant (air, water or steam);

- by the method of wiring (upper or lower);

- according to the method of connection heating appliances(single pipe or two-pipe system).

With the upper wiring, the coolant is supplied from the network from top to bottom. When, on the contrary, from the bottom up, then this is the bottom wiring.

Ways to connect heating devices

Now the most common are water single-pipe systems, from the bottom vertical wiring. In this case, the connection of the radiator is carried out with the help of connections, because they are easy to install and well guarantee uniform heating. Such a heating system requires accurate calculations of the number of sections for radiators, taking into account the level of water cooling and, in addition, carefully adjusted heaters, since the water in single pipe systems goes through them all in sequence.

The most successful heating concept, in my opinion, is the two-pipe heating system. The principle of its operation provides for the synchronous supply of hot and draining of already cold water along different pipes. In addition, this concept facilitates the calculation of individual consumption.

elevator scheme internal system heating system was widespread at one time in apartment buildings due to its ability to maintain stability even with changes in pressure and temperature. The elevator does not need constant supervision as the pressure control follows the selected nozzle diameter. Modern residents of MKD have inherited the elevator scheme from Soviet times.

The norm for in-house heating is a water temperature of 95 degrees, but according to main pipelines The heating network is supplied with water at a temperature of 130 to 150 degrees Celsius. Such a difference is justified by the existing temperature curves for the release of the coolant from the heat source, but is not suitable for entering the internal pipeline.

The mechanical elevator in such a scheme is designed to normalize the temperature and pressure of water before it enters the internal heating network. But besides the undoubted advantages, a mechanical heating elevator has a number of significant shortcomings. And I wrote about this in .

Types of heating elevators

They have a whole range of types, each is selected based on the proper implementation of a certain load. These devices differ in their type range by dimensional steps and throttle nozzles, which are calculated and adjusted for each specific option. I wrote about this in .

Heating system device

The thermal unit is a way of connecting the house heating system to the main networks. In the structure of a thermal unit in a typical apartment building built Soviet years includes: sump, shutoff valves, control devices, the elevator itself, etc.

The elevator assembly is placed in a separate ITP premises(individual heating point). By all means, there must be the presence of shut-off valves in order, if necessary, to disconnect the intra-house system from the main heat supply.
In order to avoid blockages and blockages in the system itself and in the devices of the internal house pipeline, it is necessary to isolate the dirt coming along with hot water from the main heating system, for this a sump is installed. The diameter of the sump is usually from 159 to 200 millimeters; all incoming dirt (solid particles, scale) collects and settles in it. The mud tank, in turn, needs timely and regular cleaning.

Control devices are thermometers and pressure gauges that measure temperature and pressure in the elevator assembly.

The principle of operation of the elevator unit

The mixing elevator serves as a device for cooling superheated water obtained from the heating network to a standard temperature before it is fed into the house heating system. The principle of its lowering is to mix water elevated temperature from the supply pipeline and cooled down from the return pipeline.

The elevator consists of several main parts. These are a suction manifold (inlet from the supply), a nozzle (throttle), a mixing chamber (the middle part of the elevator, where two flows are mixed and pressure is equalized), a receiving chamber (admixture from the return), and a diffuser (exit from the elevator directly to the network with a steady pressure ).

The nozzle is a narrowing device located in a steel case elevator device. From it hot water at high speed and with reduced pressure, enters the mixing chamber, where water is mixed from the heating network and the return pipeline by suction. In other words, hot water from the main heating network enters the elevator, in which it passes through a narrowing nozzle at high speed and already reduced pressure, mixes with water from the return pipeline, and then, with an already reduced temperature, moves into the house pipeline. How the mechanical elevator nozzle directly looks can be seen in the photo below.

In modern modifications of the elevator, the technology for controlling the change in the nozzle section occurs automatically using electronics. In such a system, the mixing ratio of hot and chilled water varies, which reduces the cost of the heating system. These are the so-called weather-dependent or adjustable elevators, and I wrote about this in .

This structure of the elevator has an actuator to ensure its stable performance, consisting of a guiding device and a throttle needle, which is driven by a toothed roller. The action of the throttle needle regulates the coolant flow.

Malfunctions of elevator units of the heating system

Failures can occur for various reasons. This may be a breakdown of the valve, or a failure of the control valve settings. If the nozzle is directly clogged, it must be removed and cleaned. If a blockage occurs in the sump, even before the elevator, then the removal occurs by dumping the accumulated dirt using a relief valve (discharge valve) located in its lower part. In the event that, with this method of cleaning, the clogging cannot be removed, then the sump must be disassembled and thoroughly cleaned.

When directly changing the diameter of the nozzle in the mechanical elevator as a result of deformation, the internal heating system is unbalanced. A similar problem requires the immediate replacement of the nozzle itself with a new one.

Checking the condition of the elevator unit of the heating system

Such an examination has a clear sequence:

- checking the integrity of pipes;

- reconciliation of readings on control devices (pressure gauges and thermometers);

— check of pressure losses (internal resistance of the heating system);

— calculation of the mixing ratio.

After the examination is completed, the equipment is sealed with fixed settings to avoid unauthorized interventions.

An indisputable advantage elevator system is easy to operate. Since it does not need round-the-clock monitoring, it is quite enough to carry out scheduled inspections. Although, I would like to add that I myself am not a supporter of elevator scheme heating systems, and especially schemes with a mechanical elevator. It is not modern, and got "in the load" from past times. Then, about 30 - 50 years ago, the installation of such heating schemes was fully justified and justified. But much water has flowed under the bridge since then.

Installation of the elevator unit of the heating system

The place for its installation, in order to avoid problems, must meet certain parameters. A full-fledged room is needed, in which there will be a positive temperature, in elevator units with an automatic (weather-dependent) system, in order to avoid power outages, it is better to provide offline source power supply.

Not so long ago I wrote and published a book « ITP device(Heat Points) of Buildings”. In it on concrete examples I considered various schemes ITP, namely the ITP scheme without an elevator, the scheme heating point with an elevator, and finally, a diagram of a heating unit with a circulation pump and adjustable valve. The book is based on my practical experience I tried to write it as clear and accessible as possible.

Here is the content of the book:

1. Introduction

2. ITP device, scheme without elevator

3. ITP device, elevator scheme

4. ITP device, circuit with a circulation pump and an adjustable valve.

5. Conclusion

The device of ITP (heat points) of buildings.

What it is - the elevator unit of the heating system, is not clearly understood by every consumer. In domestic climatic conditions, it is difficult to imagine a home without a source of heating. The system in question allows you to optimize heating, unlike the stove counterpart, which could not heat the floor, due to significant care warm air up. Let's try to figure out the subtleties elevator equipment and its benefits.

General information

Since technical development does not stand still, specialists have designed water system heating. Here it is appropriate to ask the question: "What is the elevator unit of the heating system?". It is a design that allows you to heat the air in the room, regardless of the height of the ceilings and total area rooms.

In a private house, owners most often use the type individual heating. In apartments, as a rule, it is operated central system. Next, we will consider what an elevator block is, what functions it performs.

heating unit?

The unit in question is a device included in the heating unit, which performs the options of a jet or injection pump. The main task of such a modification is to increase the pressure inside the operating heating structure. Simply put, the elevator system pumps the coolant through the system, while simultaneously increasing its volume.

The following example will help to understand what this elevator unit of the heating system is:

• When supplied from the main water supply, about 5 cubic meters coolant fluids.
• AT working system twice as much material is already coming in.
• Increasing feed and volume are predominantly related to ordinary physical laws.
• First of all, keep in mind that the elevator in the thermal system is a connection to the central ones where the main thermal power plant is operated under pressure or in the boiler room.

Principle of operation

The operation of the elevator unit of the heating system is to supply water that moves through the pipeline. AT winter period liquid temperature can reach 150 degrees Celsius. Despite the fact that the degree of boiling is 100 degrees, one of the laws of physics plays an additional role in the operation of the system. At the considered temperature, water begins to boil only if it is in an open tank without supply additional pressure. Since there is an additional load in the pipeline, the liquid circulates more actively using pumping equipment. In this regard, boiling does not occur even when critical values ​​\u200b\u200bare exceeded.

Peculiarities

The elevator assembly of the heating system, the photo of which is presented below, cannot work efficiently at a temperature of 150 degrees. There are a number of prerequisites for this:

• Cast iron does not like thermal extremes. If the apartment uses radiators made of such material, in this case it is subject to deformation and failure. Failure can reach the point of complete destruction of the battery.
• Excessive temperature also actively heats metal radiators, resulting in burns.
• Modern binding of fixtures is made of plastic, which can withstand a maximum of 90 degrees. At 150 degrees - it will just start to melt.
• To cool the main hearth, just the elevator is used.

purpose

The purpose of the elevator assembly in the heating system is to lower the temperature of the fluid used in the structure. After passing through this node, a coolant enters the dwelling normal temperature. As it turned out, elevators are necessary in order to lower the water temperature for heating systems.

The process itself is quite simple. The fixture includes working chamber, where hot water and liquid coming from the return circuit are mixed. This solution makes it possible to obtain a sufficient amount of coolant without excessive water consumption.

Service

Next, consider the features of maintenance of the elevator unit of the heating system. What is it, discussed above. During the operation of the system, certain losses in liquid temperatures occur. At the same time, it should be taken into account that the water supply is carried out through a nozzle with a reduced diameter, in contrast to the dimensions of the hot water pipeline. The increase in the speed of fluid movement is provided by pressure, which makes it possible to provide all risers with coolant. This design guarantees uniform heating of rooms, regardless of the presence or absence of a distribution block.

The numbers of elevator units of the heating system require proper maintenance. Some workers simply remove the nozzle and install metal shutters that are responsible for manually adjusting the rate of water flow. This is not the worst option, it is much more problematic to operate the system without them.

In such a situation, dwellings in the immediate vicinity of the system will receive an excessive amount of heat, even in the most severe frost, residents will have to ventilate the apartment. And in rooms located far from the interchange, on the contrary, it will be cold. People will have to use additional sources of heating. In fact, the culprit is improper maintenance of the system.

Exploitation

The principle of operation of the elevator unit of the heating system is more understandable when studying the diagram. It makes it possible to understand that the design performs the option of two devices at once: a circulation pump and a mixer.

The device configuration is as simple as possible, but quite effective. The system has an affordable price, does not require connection effective work certain rules must be observed, namely:

• In terms of forward and reverse circulation, a pressure of about 0.9-2.0 bar should be maintained.
• The temperature regime of the output liquid cannot be adjusted.
• All parts of the fixture must fit exactly, which requires appropriate calculations.

Despite some operational difficulties, the elevator assembly of the heating system, the dimensions of which require proper adjustment, is quite popular in the utility industry and differs high rate efficiency. The final results of the construction work are absolutely not affected by differences in thermal and hydraulic parameters. The unit does not need constant monitoring, and its adjustment is carried out the right choice nozzle size.

Main malfunctions

Most often, in the node under consideration, breakdowns occur due to the failure of the device itself. This may be due to a change in nozzle diameter or clogging. In addition, fittings, mud collectors may be deformed, or the settings of the regulatory elements may be lost.

It's easy to spot the error. The main sign of a breakdown is the presence of temperature differences before and after connecting to the system. In the case of a significant difference in indicators, we can safely talk about violations in the operation of the unit. If the difference in parameters is not very significant, the problem is most likely a clogged nozzle. For repairs, it is better to use the services of specialists, since self-intervention can lead to a worsening of the situation.

Other problems

To remove clogged nozzle, it is removed mechanically and thoroughly cleaned with a rag and brush. If the diameter of this element changes due to the presence of rust, the operation of the heating system will be disrupted. At the same time, the rooms in the lower part high-rise building will overheat, and the upper apartments will experience a lack of heat. The only way to solve the problem is to replace the nozzle.

Heating system pressure gauges are mounted in front of and behind the sump. If the instruments show a significant pressure drop, this indicates a clogged dirt cleaning element. The malfunction is eliminated by removing contaminants through the release valves located at the bottom of the assembly. If it is impossible to solve the problem in this way, the sump is disassembled and cleaned.

In conclusion

Home heating system with the simplest elevator system- not the most perfect design. Such an assembly is difficult to adjust, often requiring disassembly and replacement of the injection type nozzle. The best option an installation with the possibility of automatic adjustment of elements that make it possible to mix the coolant in a specific range is considered.

In any building connected to a centralized heating network (or boiler room), there is an elevator unit. The main function of this device is to lower the temperature of the coolant while increasing the volume of pumped water in the house system.

Node assignment

Elevator nodes are installed when superheated water is supplied to a residential building from a CHP or boiler house, the temperature of which can exceed 140 ºC. It is unacceptable to supply boiling water to apartments, as this is fraught with burns and destruction. cast iron radiators. These devices do not tolerate sudden temperature changes. As it turned out, so popular today polypropylene pipes They also dislike high temperatures. And although they are not destroyed by the pressure of hot water in the system, their service life is significantly reduced.

The superheated water supplied from the combined heat and power plant first enters the elevator unit, where it mixes with chilled water from the return pipeline of the residential building and is again supplied to the apartments.

The principle of operation and the diagram of the node

The hot water entering the residential building has a temperature corresponding to the temperature schedule of the combined heat and power plant. Having overcome the valves and mud filters, superheated water enters the steel housing, and then through the nozzle into the chamber, where mixing takes place. The pressure difference pushes the water jet into the expanded part of the body, while it is connected to the cooled coolant from the heating system of the building.

The superheated coolant, having a reduced pressure, flows at high speed through the nozzle into the mixing chamber, creating a vacuum. As a result, the effect of injection (suction) of the coolant from the return pipeline occurs in the chamber behind the jet. The result of mixing is water at the design temperature, which enters the apartments.

The elevator device diagram gives a detailed idea of functionality this apparatus.

Advantages of water jet elevators

The peculiarity of the elevator is the simultaneous performance of two tasks: to work as a mixer and as circulation pump. It is noteworthy that the elevator unit operates without the cost of electricity, since the principle of operation of the installation is based on the use of a pressure drop at the inlet.

The use of water jet devices has its advantages:

• simple design;
• low cost;
• reliability;
• no need for electricity.

Using the latest models of elevators equipped with automation, you can significantly save heat. This is achieved by controlling the temperature of the coolant in the zone of its outlet. To achieve this goal, you can lower the temperature in apartments at night or during the daytime, when most people are at work, study, etc.

The economical elevator assembly differs from the usual version having an adjustable nozzle. These details may be different design and adjustment level. The mixing ratio for an apparatus with an adjustable nozzle varies from 2 to 6. As practice has shown, this is quite enough for the heating system of a residential building.

The cost of the equipment automatic adjustment significantly higher than the price of conventional elevators. But they are more economical, functional and efficient.

Possible problems and malfunctions

Despite the strength of the devices, sometimes the elevator heating unit fails. Hot water and high pressure quickly find weak spots and cause breakdowns.

This inevitably happens when individual nodes have an assembly inadequate quality, the calculation of the nozzle diameter is incorrect, and also due to the formation of blockages.

Noise

The heating elevator, while working, can create noise. If this is observed, it means that cracks or burrs have formed in the outlet part of the nozzle during operation.

The reason for the appearance of irregularities lies in the distortions of the nozzle caused by the supply of coolant under high pressure. This happens if the excess head is not throttled by the flow controller.

Temperature mismatch

The quality of the elevator can also be called into question when the temperature at the inlet and outlet differs too much from temperature graph. Most likely, the reason for this is the oversized nozzle diameter.

Incorrect water flow

A faulty throttle will result in a change in water flow compared to the design value.

Such a violation is easy to determine by the change in temperature in the incoming and return pipeline systems. The problem is solved by repairing the flow regulator (throttle).

Faulty structural elements

If the scheme for connecting the heating system to an external heat main has an independent form, then the cause of poor-quality operation of the elevator unit can be caused by faulty pumps, water heating units, shut-off and safety valves, all kinds of leaks in pipelines and equipment, malfunction of regulators.

The main reasons that negatively affect the scheme and principle of operation of pumps include the destruction of elastic couplings in the joints of the pump and motor shafts, wear of ball bearings and destruction seats under them, the formation of fistulas and cracks on the body, the aging of seals. Most of the listed faults are repaired.

The problem of fistulas and cracks on the body is solved by replacing it.

Unsatisfactory operation of water heaters is observed when the tightness of the pipes is broken, they are destroyed or the tube bundle sticks together. The solution to the problem is to replace the pipes.

Blockages

Blockages are one of the most common causes of poor heat supply. Their formation is associated with the ingress of dirt into the system when the dirt filters are faulty. Increase the problem and deposits of corrosion products inside the pipes.

The level of clogging of filters can be determined by the readings of pressure gauges installed before and after the filter. A significant pressure drop will confirm or refute the assumption of the degree of clogging. To clean the filters, it is enough to remove the dirt through the drain devices located in the lower part of the housing.

Any problems with pipelines and heating equipment must be repaired immediately.

Minor remarks that do not affect the operation of the heating system, in without fail are registered in special documentation, they are included in the plan for current or major repairs. Repair and elimination of comments takes place in the summer before the start of the next heating season.