How to install a pump on homemade heating. How to install a circulation pump. Equipment Installation Requirements

Circulation pumps are installed in heating systems with forced or natural circulation. It is needed to increase heat transfer and to be able to adjust the temperature in the room. Installing a circulation pump is not the most difficult task; if you have a minimum of skills, you can do it yourself, with your own hands.

What is a circulation pump and why is it needed

A circulation pump is a device that changes the speed of movement of a liquid medium without changing the pressure. In heating systems, it is placed for more efficient heating. In systems with forced circulation, it is an indispensable element, in gravitational systems it can be set if it is necessary to increase the thermal power. Installing a circulation pump with several speeds makes it possible to change the amount of heat transferred depending on the temperature outside, thus maintaining a stable temperature in the room.

Sectional view of a wet rotor circulation pump

There are two types of such units - with a dry and wet rotor. Devices with a dry rotor have a high efficiency (about 80%), but they are very noisy and require regular maintenance. Wet rotor units operate almost silently, with normal coolant quality, they can pump water without failures for more than 10 years. They have a lower efficiency (about 50%), but their characteristics are more than enough to heat any private house.

Where to put

It is recommended to install a circulation pump after the boiler, before the first branch, but on the supply or return pipeline it does not matter. Modern units are made from materials that normally tolerate temperatures up to 100-115 ° C. There are few heating systems that work with a hotter coolant, therefore considerations of a more “comfortable” temperature are untenable, but if you are so calmer, put it in the return line.

There is no difference in hydraulics - the boiler, and the rest of the system, it does not matter whether there is a pump in the supply or return branch. What matters is the correct installation, in the sense of tying, and the correct orientation of the rotor in space. Nothing else matters.

There is one important point at the installation site. If there are two separate branches in the heating system - on the right and left wings of the house or on the first and second floors - it makes sense to put a separate unit on each, and not one common one - directly after the boiler. Moreover, the same rule is preserved on these branches: immediately after the boiler, before the first branching in this heating circuit. This will make it possible to set the required thermal regime in each of the parts of the house independently of the other, and also in two-story houses to save on heating. How? Due to the fact that the second floor is usually much warmer than the first floor and much less heat is required there. If there are two pumps in the branch that goes up, the speed of the coolant is set much less, and this allows you to burn less fuel, and without compromising the comfort of living.

strapping

There are two types of heating systems - with forced and natural circulation. Systems with forced circulation cannot work without a pump, with natural circulation they work, but in this mode they have a lower heat transfer. However, less heat is still much better than no heat at all, so in areas where electricity is often cut off, the system is designed as hydraulic (with natural circulation), and then a pump is slammed into it. This gives high efficiency and reliability of heating. It is clear that the installation of a circulation pump in these systems has differences.

All heating systems with underfloor heating are forced - without a pump, the coolant will not pass through such large circuits

forced circulation

Since a forced circulation heating system without a pump is inoperative, it is installed directly into the break in the supply or return pipe (of your choice).

Most problems with the circulation pump arise due to the presence of mechanical impurities (sand, other abrasive particles) in the coolant. They are able to jam the impeller and stop the motor. Therefore, a strainer must be placed in front of the unit.

Installing a circulation pump in a forced circulation system

It is also desirable to install ball valves on both sides. They will make it possible to replace or repair the device without draining the coolant from the system. Turn off the taps, remove the unit. Only that part of the water that was directly in this piece of the system is drained.

natural circulation

The piping of the circulation pump in gravity systems has one significant difference - a bypass is required. This is a jumper that makes the system operational when the pump is not running. One ball shut-off valve is installed on the bypass, which is closed all the time while pumping is in operation. In this mode, the system works as a forced one.

When electricity fails or the unit fails, the faucet on the jumper is opened, the faucet leading to the pump is closed, the system works like a gravitational one.

Mounting Features

There is one important point, without which the installation of the circulation pump will require alteration: it is required to turn the rotor so that it is directed horizontally. The second point is the direction of the flow. There is an arrow on the body indicating in which direction the coolant should flow. So turn the unit around so that the direction of movement of the coolant is “in the direction of the arrow”.

The pump itself can be installed both horizontally and vertically, only when choosing a model, see that it can work in both positions. And one more thing: with a vertical arrangement, the power (created pressure) drops by about 30%. This must be taken into account when choosing a model.

Power connection

Circulation pumps operate from a 220 V network. The connection is standard, a separate power line with a circuit breaker is desirable. Three wires are required for connection - phase, zero and ground.

The connection to the network itself can be organized using a three-pin socket and plug. This connection method is used if the pump comes with a connected power cable. It can also be connected via a terminal block or directly with a cable to the terminals.

The terminals are located under a plastic cover. We remove it by unscrewing a few bolts, we find three connectors. They are usually signed (pictograms are applied N - neutral wire, L - phase, and "earth" has an international designation), it is difficult to make a mistake.

Since the entire system depends on the performance of the circulation pump, it makes sense to make a backup power supply - put a stabilizer with connected batteries. With such a power supply system, everything will work for several days, since the pump itself and the boiler automation “pull” electricity to a maximum of 250-300 watts. But when organizing, you need to calculate everything and select the capacity of the batteries. The disadvantage of such a system is the need to ensure that the batteries are not discharged.

The circulation pump increases the efficiency of the autonomous heating system, allows 100% use of all heating circuits.

Professional installation of the pump for heating guarantees high performance, reduces noise and reduces maintenance and repair costs. Installation of the device does not cause any particular difficulties, but there are a number of nuances that are important to consider.

We will tell you how to choose a circulation pump, help you decide on the optimal scheme for inserting equipment into the system, outline installation requirements, and also provide step-by-step instructions for installing the device.

Previously, circulation pumps were used only in central heating systems, and for private housing construction, the natural movement of the coolant caused by the temperature difference was the norm.

Now forced circulation is used everywhere due to the emergence of compact and inexpensive models designed to service the heating networks of small houses and cottages.

With the advent of circulation pumps, the number of circuit solutions has expanded. It became possible to lay long highways of varying complexity, while the dependence on the slope has practically disappeared

Due to the increase in the speed of the coolant in the pipeline, thermal energy flows faster to the heating radiators, respectively, the premises warm up faster. The load on the boiler has decreased because the heating of water has also become faster.

The need to install bulky and inconvenient large-diameter pipelines has disappeared, it has become easier to mask the contours under the floor covering or deepen into the walls.

It became possible to install a "warm floor" system on any floor of a private house, which effectively operates only at a certain pressure in the network

The main disadvantage of pumps for heating systems is their dependence on electricity. If the power is intermittent or there is a risk of a complete blackout for some period, it is necessary to install a backup power generator or at least an uninterruptible power supply.

The remaining disadvantages relate to the designs and functionality of devices of various types. For example, monoblock units and devices with a dry rotor are noisier and require constant maintenance, while a wet rotor pump is demanding on the quality of the coolant and has a head limit.

Criteria for a competent choice of equipment

All installation efforts will be reduced to zero if you choose the wrong equipment. In order not to be mistaken, it is necessary to first analyze all aspects of a particular heating system and make the necessary calculations.

The main types of pumps

According to the design features, all devices are divided into 2 categories: with a wet and dry rotor.

Wet pumps. This option is suitable for private houses. The unit is compact, almost silent and has a modular structure that is convenient for maintenance and repair.

But, unfortunately, it does not have high performance - the maximum efficiency of modern models reaches 52-54%.

Circulation devices for heating networks should not be confused with similar devices for hot water supply. The heating pump does not need an anti-corrosion housing made of bronze or stainless steel and additional protection against scale - respectively, and is cheaper

Dry rotor pumps productive, unpretentious to the quality of the coolant, able to work under high pressure and do not require a strictly horizontal location on the pipe. However, they are noisier, and their operation is accompanied by vibration. Many models are mounted on a foundation or metal support frame.

For installation of console, monoblock or "In-line" models, it is necessary. It is advisable to use them when a flow rate of more than 100 m³ / h is required, that is, for servicing groups of cottages or apartment buildings.

Specifications at a Glance

When choosing a pump, be sure to study specifications and compare them with the requirements of the heating system.

Important indicators are:

• pressure, which covers the loss of hydraulics in the circuit;
• performance- the volume of water or supply for a certain time interval;
• coolant operating temperature, max and min - for modern models, on average +2 ºС ... +110 ºС;
• power- taking into account hydraulic losses, mechanical power prevails over useful power.

Structural details are also important, for example, the inlet / outlet diameter of the nozzles. For heating systems, the average parameters are 25 mm and 32 mm.

The number of electric pumps is selected, focusing on the length of the heating main. If the total length of the circuits is up to 80 m, one device is enough, if more, additional devices will be required

An example of a unit for equipping a residential heating network with an area of ​​100 m² is a pump Grundfos UPS with pipe connection 32 mm, capacity 62 l/s and weight 3.65 kg. A compact and low-noise cast-iron device is not audible even behind a thin partition, and its power is enough to transport liquid to the 2nd floor.

Pumps with built-in electronics allow you to quickly switch equipment to a more convenient mode, depending on changes in temperature or pressure in the network. Automatic devices are equipped with digital displays that provide maximum information on the operation of the pump: temperature, resistance, pressure, etc.

Additional information on the calculation and selection of a circulation pump for heating is presented in the articles:

Requirements for the installation of a circulation pump

There are a number of norms that regulate the installation of a circulation pump in a heating system at the legislative level. Some of the rules are set out in SNiP 2.04.05 "Heating ...". For example, it talks about priority in heating networks.

Almost all requirements are justified by the efficiency of the system as a whole and the circulation device in particular. For example, the shaft of a device with a wet rotor must be installed on a pipe strictly horizontally in level so that air pockets do not occur inside and the pump parts do not wear out prematurely.

An obligatory element of the system is an expansion tank, which compensates for changes in the volume of the coolant during heating / cooling. Its place in a closed-type system is on the return line, in front of the circulation pump

A filter against dirt and abrasive particles is needed in any case, even when installing monolithic models. Filtered coolant will bring much less damage to pump parts than liquid with sand and suspensions.

The sump is installed with the stopper down in the direction of water movement to reduce resistance and facilitate system maintenance.

Some rules are dictated by manufacturers. For example, it was customary to install old models of certain brands exclusively on the return line, since they could not withstand high temperatures.

Now pumps have become more versatile and can be installed in any suitable place, but subject to power parameters.

Analysis of the installation technology

The installation process itself is fast, so to fix the case, you need to fix two union nuts. This is very convenient for further maintenance and repair work. But before installation, it is necessary to choose the installation site correctly, otherwise the pump will either work intermittently or will soon fail.

Pump tie-in schemes in the network

When choosing one of the schemes, it is necessary to take into account the type of heating system, boiler model and ease of maintenance.

Option 1. This is the most common solution: the pump is mounted on the "return", through which the cooled coolant returns to the boiler. Warm water is not so aggressive on the parts of the device, so it lasts longer.

Modern devices can easily withstand high temperatures, but there are still experts who reject such a scheme.

Private dwellings are no longer a rarity today. It has ceased to be something exceptional - to build a good, solid house on your site. All sorts of sheds and temporary huts are gone, but with them, simplicity in construction has also gone. For a good private house, all communications must be carried out - otherwise, what kind of residential building is it? And there are problems with such moments, at least from time to time. The following is an instruction for installing a pump in a heating system - this is a rather important point. Why, in the heating system of a private house - this is one of the most important things!

Device types

After the state decided that it was also possible to register in a private country house, the owners of such buildings began to think about the possibility of living on their site. Naturally, for this you need to carefully think through everything and redo it a little. It is not surprising, because to turn a country house into a full-fledged cottage, you should try very hard.

Capital internal heating is one of the most necessary steps in arranging a private house. So it is not surprising that the installation of a pump in a heating system is becoming more and more common. This happens only because no matter what the autonomous part of the heat supply is, for year-round operation it is required to install more and Often they get by with just one pump if there is already heating.

For consumers today there are two main options - water and circulation elements. We'll talk about them below.

water element

The heating system of the house is the most frequently requested service. But we must not forget that there are much more powerful models that can also heat an apartment building. The last option is rather exotic, not a rule. Therefore, it is the heating of an ordinary private cottage that is considered here.

Such pumps are not as popular as circulation pumps, but they still have their own audience of buyers. Installation in a heating system is a great solution if the rest of the system in a small house is already equipped.

Parts required for installation

In addition to the water pump itself, the heating system, the heart of which it should become, also includes several important parts and devices, and ignoring them will be fraught with negative consequences:

Fuel boiler.
. Hydraulic manifold.
. Hydraulic circuit (piping system).
. Radiator.
. Mixing circuit (additional element of the system).
. Sensors for pressure, temperature, water flow.
. Overheat protection system.
. Air outlets.
. Overpressure protection system.
. Air release valves.

It is not worth talking about which element is more important here in such a procedure as installing a water pump in a heating system. All of them are equally necessary, and therefore it is strongly not recommended to forget about something.

Circulation pumps

This is the second type of device that has already been mentioned. It should be noted that installing a pump in a heating system (especially a circulation pump) is not a very complicated, but extremely useful procedure. Naturally, it is better to call the masters who will do the job faster. But, in principle, you can do it yourself. Especially if you ask yourself in advance how to properly install the circulation pump in the heating system.

Benefits of circulation pumps

Undemanding to heat supply systems - that is, all sorts of slopes, narrow sections, etc. will not affect the quality of heating. In addition, these parts are also suitable for a gravity heating circuit (that is, one where there is no own circulation).
. Rapid overclocking of the system - this, as the name implies, provides a quick warm-up of residential premises. That is, installing a pump in the heating system makes it more efficient.
. Reliability of work - simplicity in service and rather simple mechanism of work provide safe and very long operation of the device.
. High efficiency - as mentioned earlier, installing a pump in a heating system increases the efficiency of its operation. The circulation element raises the efficiency of work to the maximum.

Types of circulation mechanisms

As with any other technique, there are several different types of parts. So before you figure out how to properly install the circulation pump in the heating system, it is better to find out which circulation pump is needed. They are of two types:

1. "Dry". They are characterized by the fact that the pump rotor does not come into contact with the coolant. They are mainly equipped with high-rise buildings and large premises. Installing a pump in a home heating system, if we mean the “dry” type, is fraught with some consequences, such as noise. It will create air turbulence, which, in turn, will cause noise, which will interfere with living. That is why such pumps are rarely installed in private homes.
2. "Wet". This type is characterized by the fact that the rotor is immersed in water, which it pumps. It is these pumps that are most often installed in the heating systems of private houses and small residential premises.

Mounting technology

To make it easier for yourself or the work of the specialists who will carry out the procedure, it is best to purchase such pumps and equipment, where there are detachable threads in the package. If this is not available, then you will have to suffer, choosing various adapters. In addition, you will need to purchase a deep filter, as well as a check valve that will ensure normal operation under pressure - and this does not depend on the type or type of element purchased, since installing a pump in a heating system simply requires all these parts.

Among other things, you will need some tools. To tie in the pump, you will need to stock up on different sizes - from twenty-two to thirty-six. This is usually sufficient. You also need shutoff valves and a pipe segment (the latter will play the role of a bypass) with a diameter that is equal to the diameter of the riser.

Choice of tie-in location

So that such a procedure as installing a pump in a heating system does not cause any difficulties, several points must be taken into account. First, take into account the fact that the heat supply equipment must be serviced. That is, the place must be sufficiently accessible for such procedures.

Other nuances

There are other features as well. For example, earlier pumps were installed on the return line - there was an opinion that chilled water, washing the working part of the element, prolongs its service life. Today, there is no such problem, since the details of the mechanisms are resistant to any water temperature. So installing a pump in the heating system for supply or return does not matter anymore.

In order to increase the pressure in the suction zone, it is best to install the part in the section of the supply pipe - it can even be near the point of entry into the expansion tank system. Such a scheme will provide a high temperature in a given section of the network. But for high efficiency, you need to buy an element that is resistant to strong pressure of hot water.

You can see for yourself that the installation location of the pump in the heating system must be strictly defined - otherwise it will be impossible to achieve good efficiency.

Layout of devices in the pump connection

To install the pump correctly, you should follow a number of simple rules:

Ball valves are installed on both sides. This is necessary so that the pump can be dismantled, for example during repair or replacement.
. A filter cuts into the pipe before the pump - this is necessary to avoid the ingress of large mechanical particles along with water.
. The upper part of the bypass is equipped with an air valve. Air pockets are not uncommon in such systems and are best avoided.
. The direction indicated by the arrow on the device must be observed - the movement of water must go strictly in this direction.
. "Wet" pumps are mounted horizontally. This device is protected from serious damage if not the entire electric motor is submerged in water.
. Pump terminals point up.
. Threaded connections are equipped with gaskets and protected with sealants.
. The pump must only be connected to a grounded socket.

Installation sequence

In the case when you mount the pump in an existing network, the coolant must be drained. It is better to clean a heating system with a long “experience” by running water through it several times.
. The functional chain of fittings and pump is observed according to the installation rules.
. After installation and testing of the system, it is filled with water.
. The last stage - the central screw turns, excess air is removed. When water comes out of the holes, the element is ready for use.

The last step is necessary for manual pumps - automatic models handle the air on their own. But if your unit is manual, then this procedure must be repeated each time before turning it on.

For owners of country houses with an individual heating system, the issue related to the uniform distribution of heat between all rooms is especially relevant. For this, circulation pumps are used. And the question immediately arises: how to install a heating circulation pump so that it provides uninterrupted, highly efficient, reliable operation? In this article, we will consider this issue in detail.

Reasons for installing a circulation pump

A standard problem for owners of private houses is the uneven distribution of heat throughout the heating system. If the batteries are slightly warm in the distant rooms, and the boiler boils at the same time, then you have to look for methods to improve the efficiency of the entire heating system.

For the distribution of thermal energy throughout the house, the following solutions are most often used:

• increase in the diameter of the pipes of the heating system;
• installing a pump in a heating system that is already present.

The first method is effective and practical, but it requires significant financial and physical costs, since all old pipes will have to be dismantled and replaced with new ones. Installing a circulation pump in the heating system will ensure not only the same temperature throughout the house, but also prevent the occurrence of air locks, which are the cause of poor circulation of the coolant. In addition, the cost of installing a small pump is much lower than replacing the pipes of the entire heating system, and much less physical effort will also be required.

The device and principle of operation of the circulation pump

Circulation pumps are designed for forced circulation of warm water in closed heating systems. The pump consists of a stainless steel housing and a steel rotor or motor screwed to it, an impeller is attached to the motor shaft, which contributes to the release of the coolant. The pump is powered by an electric motor. The pump installed in the heating system draws water from one side and throws it into the pipeline due to the centrifugal force that occurs when the impeller rotates. The pressure created by the pump must easily cope with the hydraulic resistance of the pipeline, radiator and other elements of the system.

Types of circulation pumps

As a rule, heating pumps are divided into two types:

• "wet";
• "dry".

In the “dry pump” designs, the rotor does not interact with the coolant; its working area is separated from the electric motor by special stainless steel sealing rings. At start-up, these rings begin to rotate one to the other and a thin water film located between the rings seals the connection due to different pressures in the heating system and the external environment. The efficiency of the circulation pump with a dry rotor becomes 80%. It is also quite noisy compared to a "wet" pump, so it should be installed in a separate, well soundproofed room.

In turn, "dry" pumps are divided into three types: vertical, horizontal and block. For horizontal "dry" circulation pumps, the suction pipe is located on the front of the shaft, and the discharge pipe is located on the housing. The motor is mounted horizontally. For vertical pumps, the nozzles are located on the same axis, and the electric motor is located vertically. Warm water enters the block pump in the direction of the axis, and is removed radially. When operating a “dry” pump, the dust content of the room should be controlled, as it can cause swirling of dust and other small solid particles, which can damage the surface of the seal rings, and as a result, the tightness of the pump. It is worth remembering that a “dry” pump requires the presence of a liquid as a lubricant, since in its absence the risk of destruction of the mechanical seal increases significantly.

"Wet" circulation pumps differ from "dry" ones in that the rotor, together with the impeller, is immersed in a coolant, which simultaneously acts as a lubricant and cooler. The rotor and stator are separated by a special "glass" made of stainless steel, which ensures the tightness of the part of the electric motor that is energized. For a heating system, the body of the "wet" pump should preferably be bronze or brass, and the rotor should be ceramic. Compared to "dry" pumps, wet pumps are less demanding in maintenance and repair, in addition, their noise is much less. However, there is a minus, the efficiency of the "wet" pump is about 50%. This is due to the fact that it is almost impossible to seal the sleeve that separates the coolant and the stator. "Wet" circulation pumps are mainly used in domestic heating, since such a capacity for heating systems of small length is quite enough.

How to choose a heating circulation pump

The first thing you should pay attention to when choosing a circulation pump is its power. It is worth remembering that for high-quality heating it is not necessary to choose a large pump with too high power. It will only create unnecessary noise, cost much more, and there is no need for it as such.

To choose a heater, you should make an accurate calculation of the power of the circulation pump, which is optimal for your home. To do this, you need to know the following parameters: pipe diameter, water temperature, coolant pressure level, throughput and boiler performance.

It is important to know how many liters of water can pass per minute through the heating system (boiler output). In addition, it is necessary to calculate the amount of water required for the normal operation of the radiator and heating system rings.

The power of the circulation pump also directly depends on the length of the pipeline. As a rule, approximately 0.5 m of pump head is required per 10 m of pipeline.

To calculate the flow rate of the coolant, you just need to equate it to the boiler power parameters. For example, if the boiler power is 25 kW, then the coolant flow rate is 25 l / min. Batteries with a power of 15 kW require 15 l / min of water. It is also worth remembering that the narrower the pipeline, the more resistance will arise in the path of movement of the coolant.

Calculation of the flow rate of the circulation pump for heating

Any circulation pump has a number of indicators, behind which its performance is determined. The main ones are pressure and flow. These parameters are reflected in the technical passport.

The flow rate of the heating circulation pump is calculated using the formula:

​

where N is the power of the boiler; t1, t2 is the temperature leaving the heat source (in most cases - 90-95 degrees) and located in the return pipeline (mainly -60-70 degrees), respectively.

The pressure of the heating pump is calculated in the same way, according to European standards, 100 W of power is needed for 1 sq. m of a private house.

Installation schemes for circulation pumps

There are two typical schemes for installing a circulation pump: single-pipe, two-pipe.

The first scheme is characterized by a constant flow rate of the coolant and a small temperature difference, and the second, on the contrary, is characterized by a variable flow rate and a high temperature difference.

The following figures show the connection diagrams of the heating circulation pump, where: 1 - boiler, 2 - automatic air vent, 3 - thermostatic valve, 4 - radiator, 5 - balancing valve, 6 - expansion tank, 7 - valve, 8 - filter, 9 - circulation pump, 10-manometer, 11 - safety valve.

Installation of a circulation pump - stages and important nuances of installation

Before installing the circulation pump, carefully study the instructions and the diagram of its connection. It is important to take into account the fact that the heating system will need to be serviced from time to time, so it must be approached.

First, drain all the heating fluid from the system, then, if necessary, clean the pipeline. The installation of the pump and the functional chain of fittings is carried out according to the connection diagram. Upon completion of the installation, the heating system is filled with water, then excess air is removed from the pump by opening the central screw. It is worth paying attention that air should be removed before each switching on of the circulation pump.

​

After the heating circulation pump has been purchased, they begin to determine its installation location. It is recommended to install the circulation pump on the return line, in front of the boiler. The thing is that air can accumulate at the top of the boiler over time, and if the pump is installed at the supply, it will, as it were, pull it out of the boiler, as a result of which a vacuum can be created, which will lead to boiling of this part of the boiler. If the pump is placed in front of the boiler, then the coolant will be pushed into it, as a result of which no air space will be created and the boiler will be completely filled. In addition, with this installation, the circulation pump will operate at lower temperatures, which will increase its service life.

At the selected pump installation site, a so-called bypass (bypass) is performed. It is necessary so that in the event of a pump breakdown or a power outage, the entire heating system does not stop working, and the coolant passes through the main pipeline thanks to open taps. It should not be forgotten that the diameter of the bypass pipe must be less than the diameter of the main pipeline. After the bypass is ready, proceed to install the circulation pump.

It is important to remember that the shaft of the circulation pump must be installed horizontally, otherwise only part of it will be in the water, that is, the pump will lose about 30% of its performance, and in the worst case, the working area may malfunction.

In addition, the installation also provides for the top location of the terminal box.

Install ball valves on both sides of the pumping equipment. You will need them later for maintenance and dismantling of pumping equipment.

The system must necessarily include a filter, which is designed to protect the mechanism from small mechanical particles that can cause significant damage to the pump.

A manual or automatic valve should be mounted on top of the bypass pipeline line, which is necessary to release air pockets that have arisen after a certain period.

To exclude an arbitrary flow of water in the heating system, it is necessary to fix the shut-off valves in the inlet-outlet area of ​​the pump.

When attaching the motor shaft, it is necessary to ensure that the box rotates along the axis with minimal effort. An expansion tank must also be provided for an open heating system.

The connecting nodes should be treated with sealant, which will increase the performance of the entire heating system

To make the installation process of the pump easier and to avoid the need to look for connections and fasteners on your own, find a special device in stores with already selected detachable threads.

The number of circulation pumps required depends on the length of the pipeline. For example, if the pipe length is about 80 m, then it will be enough to install one pump, but if the footage exceeds this figure, then two or more heating circulation pumps must be used.

The price of installing a heating circulation pump fully depends on the model of the equipment itself, the complexity of the bypass pipes and, of course, the number of pipeline circuits.

Causes of breakdown of heating circulation pumps

The most common causes of breakdown of heating circulation pumps:

• incorrect pump installation

The motor shaft must be located strictly horizontally, otherwise air may accumulate in the pump, which will disable the device.

• incorrect location of the terminal module or cable entry
• ignoring the pump deaeration procedure
• poor cleaning of the system from solid particles

It is worth remembering that all malfunctions of the circulation pump require specific skills and knowledge, so it is better to entrust the repair of heating equipment to professionals.

As you know, two types of coolant circulation can be used in the heating circuit of a private house - natural and forced. With natural circulation, the movement of the coolant along the main is provided by the pressure difference that occurs when it is heated and cooled. When installing it, it is necessary to correctly select the cross-section of the pipeline in all sections and ensure the inclination at the supply in the direction of the movement of the coolant. Natural circulation is used, as a rule, in small one-story buildings. It has the following advantages:

• Independence from the availability of electrical energy.
• Lower installation cost.
• The simplicity of the system.

However, with natural circulation, the heating of radiators can be uneven. Those that are closer to the boiler heat up more, those that are further away heat up less. This may be due to excessive hydraulic resistance. An incompetent user usually increases the heating temperature of the coolant, but this does not provide uniformity of heating, only increasing heating costs.

There are two ways to fix the problem - increase the size of the inner diameter of the pipes or insert an additional element - the pump, thus providing forced circulation.

The first option - replacing pipes with products with a larger diameter - is not always acceptable. With the pipeline already installed, not everyone will want to redo it, while facing all the inconveniences inherent in the transitional repair period. It is very troublesome, labor-intensive and financially very much hits the pocket.

Installing a pump in a heating system, as an additional element that provides forced circulation, looks much more attractive. This will entail less financial costs, less labor costs and make the work more efficient.

An additional pump will make you dependent on the availability of electrical energy, however, the scheme for connecting it to the house heating main can be designed in such a way as to allow a quick transition to natural circulation.

Features of the water pump and the subtleties of its installation

Proper installation of a water pump in the heating system of a private house will ensure uniform distribution of fluid throughout all sections of the highway. You can easily do this work with your own hands - the main thing is to correctly perform each operation.

First you need to decide on the power of the unit. The power of the boiler is determined by the heat flow per unit of time. And the power of the water pump is selected based on the length of the pipeline. We do not need an overly powerful device - it will create unnecessary noise and the cost of electricity for its operation will be unreasonably high.

There are two types of devices:

• Dry - they work without parts immersed in the liquid.
• Wet - their rotor is immersed in a coolant, which guarantees a lower noise level during operation.

Wet models are selected for a private house.

Before you install the pump for home heating with your own hands, you need to decide on the place of its tie-in. Older models were usually put on the return feed. Modern devices allow you to install them anywhere, however, for greater efficiency and uniformity of the heat flow, it is best to embed it on the return pipe between the expansion tank and the boiler.

The figure shows a connection diagram for a home heating system.

Here are the following elements:

1. Boiler.
2. Coupling connection.
3. Cranes.
4. Means of control.
5. Water pump.
6. Filter for cleaning the coolant.
7. Expansion tank of membrane type.
8. Heating appliances.
9. Water top-up system.
10. Controls.
11. Thermal sensor.
12. emergency controller.
13. Grounding.

The coolant that goes through the apparatus cools it. The body of the unit is made of cast iron, the rotor is made of steel or plastic. With proper operation and timely service, the device can work for more than 20 years.

When doing work with your own hands, you need to take into account that such a scheme requires water filtration - it is necessary so that small particles in the coolant do not prematurely wear out the mechanism of the device.

On the body of the device, as a rule, an arrow indicates the direction of movement of the coolant. If you install it incorrectly with your own hands, you will have to clean the flywheel much more often.

How to install a water pump in a home heating system

After the power of the unit has been selected and we have decided on its location, we can proceed to install it ourselves.

• We stop the system and drain the coolant from the pipeline.
• Before the installation site, we install a filter to clean the coolant from slag.
• We mount the device on the bypass - this is necessary so that, if necessary, the heating can work with natural circulation. On both sides of it we put shut-off valves.
• At the top of the bypass, we put an air valve to deaerate the circuit.
• We put one shut-off valve on the main line - we block it with forced circulation.
• We provide a power supply point to ensure the operation of the device.
• Each threaded connection is hermetically sealed using gaskets in order to avoid leakage of the coolant.

The figure clearly shows the connection diagram of the device.

This method of connection on the bypass allows you to perform service and repair of the device without stopping the heating. In the event of an unauthorized power outage, it is possible to quickly switch to natural circulation.

After the device is installed, fill the system with water. We unscrew the screw on the cover of the device case and release the air. After the water comes out, we can start the unit.

Conclusion

The use of a circulation pump in a heating system is very beneficial for its efficiency. The temperature distribution is evened out over the sections of the highway, the temperature adjustment of the system is much easier, the heating time of the heating devices is significantly reduced.

As practice shows, you can install such a device yourself. The main condition is the correct choice of device parameters, competent installation that meets all requirements and instructions. If you were careful and did everything diligently and accurately, your system will work much more efficiently than before.

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How to install a heating pump in a private house with your own hands

aqueo.ru » Heating » How to install a heating pump in a private house with your own hands

In most cases, in private houses, especially small ones, a gravity heating system is used. However, if the house is too large, and there is not enough heat from such a system, it is necessary to use specialized devices that will fix this problem. One of these devices is a circulation pump for heating.

Application

Thanks to this device, the liquid (coolant) is forcibly circulated through the pipes, distributing heat everywhere equally. The gravity-fed system mentioned earlier works on a different principle: water simply flows through the pipes, heating them up. In this case, any uniform heating is nothing more than luck.

After installing a circulation pump on a domestic heating system, there is no doubt that it will cope with heating a large house. This device will easily and quickly heat every room where there are pipes, and will maintain the temperature for the right time (especially in winter, when the street temperature drops significantly in Russian realities).

A gravity system is not able to heat a large room.

Almost every owner of a private house, in which a completely independent heat supply system, faced such a problem as space heating - not just heating, but even distribution of the coolant through the pipes.

As a rule, areas of the heating system remote from the boiler receive a significantly smaller volume of coolant than those that are close.

To correct the problem described above, there are two possible options: mounting the circulation pump in the heating system, creating a completely new pipeline using large diameter pipes.

Installing new pipes is a very effective method. However, the cost of such a method will be significant. In addition, additional efforts and skills will be required that not every owner of a private house has.

Installing a circulation pump is a task that does not cause any particular difficulties and does not require specialized skills. The cost of the pump and its further integration into the heating system will be significantly lower than in the previously described case.

When replacing pipes with new ones, you will have to remove all the old ones, which is very difficult. Therefore, it is strongly recommended to use a circulation device for heating.

From the foregoing, a logical conclusion can be drawn: in all respects, the circulation pump is the most loyal option, which, moreover, does not require much effort during installation and operation.

Kinds

As a rule, for self-installation of the pump, you need to know their varieties.

In most cases, two types of pumps are used in pumps: "wet" and "dry".

"Dry" absolutely do not come into contact with the coolant itself, while "wet" inherently consist of a liquid.

"Dry" coolants create noise during operation, which is why the installation scheme of such a pump is more suitable for large enterprises, etc., but not for a domestic heating system.

The coolant, which has the form of a liquid, in contrast to the "dry", on the contrary, is intended for heat supply to private houses with individual heating. Usually such systems consist of brass and bronze to avoid any possible damage.

To optimize the system, you need to know how to install the pump yourself.

Choice

Before starting the installation, you need to decide what exactly to install. The number of circulation pumps on the market is very large, which makes the choice of a suitable device difficult. However, you should not despair because of this. One has only to study the technical characteristics of the devices more carefully and carry out calculations.

For the full operation of the heating system, it is not necessary to install an extremely expensive and powerful unit. You can get by with a small device.

Installing such a device will cause unnecessary noise and bulkiness of the system. In addition, there is no need to install such a pump in the house.

Before installation, you need to make all the necessary calculations so that in the future there are no difficulties and shortcomings.

To perform calculations, you need to know: the initial power of the boiler and the amount of total coolant flow.

It should be remembered that the power and speed of the heating system depends on the length of the pipeline.

Power

Responsible for the power of the system:

• pipeline pipe diameter;
• temperature of the liquid (coolant);
• coolant pressure.

Installation

To facilitate the integration of the device into the system, it is advisable to initially, even at the selection stage, pay attention to the type of thread, choosing the appropriate one. Thanks to the correctly selected type of thread, there will subsequently be no need to look for suitable fasteners and device connections.

After completing the initial stage of integrating the circulation pump into the heating system at home, you need to carefully study the diagram and instructions (the instructions are attached to the pump).

In the absence of confidence in the choice, it is strongly recommended to contact a specialist who will help you choose a circulation device.

Place

The main condition that must be observed when installing the pump with your own hands: you need to provide easy access to it. This is due to the fact that at any time during operation, a breakdown, etc., can occur.

Also based on the above rule, it should be taken into account in advance that the system needs human service.

In the modern world, water-based pumps are completely harmless to external influences of liquids of various temperatures. However, in some older heating systems, moisture could completely spoil it.

Thanks to improved modern systems, the circulation pump can be installed both on the inlet and return pipes.

An important factor to consider: the circulation pump must be able to contain the strong pressure of heated water. If this factor is not observed, problems with the system as a whole are possible.

rules

Having studied in detail the theoretical part of the installation of the circulation pump, you can safely proceed to practice.

In order to avoid any problems, it is worth adhering to some of the technical aspects (rules) below.

At both ends of the pump, ball valves must be fixed, which are necessary for servicing and dismantling the circulation pump.

Slightly above the bypass there should be a valve of any of two types: manual or automatic.

There is no fundamental difference in valve types.

The heating system must have a filter. It is necessary so that small particles of debris that can damage the pump do not get into the device. As you can see from this example, the water in heating systems is often not completely clean.

To ensure the greatest degree of productivity, the pump must be installed in a horizontal position. This is especially true for the "wet" type of coolant.

Each fastening of the heating system must be treated with sealants. This is necessary to ensure the greatest strength of the connection.

It should be ensured that the pump mountings are clearly on the heating circuit in compliance with the pattern.

Circulation pump. Video

The nuances of installing a circulation pump can be gleaned from this video.

For the full and productive operation of the circulation pump, it is necessary to strictly follow the installation rules prescribed above.

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How to properly install a pump in a heating system.

How to install a circulation pump for heating a private house.

Continuation, the beginning of the article, which describes the fundamental principles of choosing a pump for the heating system of a private house, or a summer residence, can be read here. When selecting a pump for an underfloor heating system, there is a slightly different method for choosing a pump. This is because the heat distribution system in this case requires careful balancing, which means that in order to eliminate errors, a slightly larger pump should be installed on such heating systems than if you made a calculation for a heating system with bimetallic radiators. This is due to the fact that you will have to pump a larger volume of coolant along the total length of the pipes. If the underfloor heating system is poorly developed, has two or three branches, the pump is selected with a coefficient of 1.5. Then add 0.1 for each branch if it is short and 0.2 if it is long (the area of ​​the room is more than 20 m2). At the same time, a developed pressure of three meters is sufficient for any underfloor heating system.

Recommendations for the correct installation of a circulation pump for heating in a private house.

Circulation pumps installed in closed heating systems with a membrane tank must be installed on the return pipeline in the boiler room, next to the boiler.

Some authors recommend installing an expansion membrane tank on the return pipeline (return) as close as possible to the pump. In principle, this can somewhat soften the operation of the pump, but there is no need for this, you can install an expansion membrane tank in any convenient place, preferably on the return line and closer to the boiler. The main thing is to properly prepare (pre-inflate to a certain pressure) the expansion tank of the heating system for operation. Read about this in the article "How to choose the right expansion tank."

When installing a circulation pump in a heating system, mistakes are often made that, at best, reduce the service life, and at worst, disable it. The most common installation mistake is installing the pump not in a horizontal position as shown in the figure. As you remember from the last article, wet rotor pumps are installed in the heating systems of private houses. In such pumps, the impeller must float in the working medium, due to which natural lubrication and smooth running of the impeller occur, and cooling of the pump motor. The branded block of the pump must be placed on top or facing you.

How to remove air from the circulation pump before starting.

How to remove air from the circulation pump before starting.

The heating system must be flushed before start-up to remove solid particles that could jam the impeller. Before starting a wet rotor pump, it is essential to bleed it by slightly loosening the shiny screw in the center of the pump motor. Air is vented until water flows out from under the released screw without air bubbles. The air removal operation must be repeated several times after 5-10 minutes of operation. In this case, the pump does not need to be stopped. After a long summer downtime, in order to avoid jamming of the pump and its burnout, before starting, be sure to completely unscrew the same screw, having previously closed the taps before and after the pump, and turn the rotor with a screwdriver (on some pumps, a hexagon).

As you can see for yourself, the selection, installation and start-up of the pump in the heating system of a private house is a rather complicated procedure. Therefore, if you are still not confident in your abilities, it is better to invite a professional specialist. And use our recommendations in everyday maintenance and for general development, if, God forbid, you come across a grief - a professional, and such people are found at every step, you can avoid unnecessary financial costs.