Turn on the circulation pump. If something goes wrong, the entire structure will suffer! Installing a pump in the heating system of a private house. The pump does not turn on

Gone are the days when water heating systems operated without pumps. And today, the efficiency of the heating system increases precisely thanks to the installation of a pump. In addition, the room warms up much faster and fuel consumption is reduced. Connecting the pump to the heating system makes it possible to install towel dryers, thermostats and use smaller diameter pipes.

Advantages of connecting a pump to a heating system

Owners of country houses with a decentralized water supply system are faced with the problem of uniform heat distribution across all heating circuits. For example, if water boils in the boiler, but radiators in distant rooms remain barely warm. In this case, it is recommended to look for optimal means to solve the problem.

To improve circulation, there are two proposals: installing large-diameter pipes or updating the system by installing, or rather inserting into the pipe, a pressure pump. There are few people willing to dismantle pipes if they are still walled up inside the premises. And the cost of the system itself, which includes pipes with a large diameter, is not always liked by the owners because of its high cost. And the price of a pump for a heating system is much lower.

Therefore, there is a need to install a pressure pump. Circulation pumping devices are installed on heating systems operating on all types of fuel - wood, coal, fuel oil. Updating the heating system by inserting a pump into the heating system will help you:

Equalize the temperature in the pipes;
Eliminate the appearance of air pockets that prevent the coolant from circulating normally;
Increase the operating area of your heating system.

Rules for choosing a pump for a heating system

To install it in a heating system, there is no point in purchasing a fairly powerful pump, because you will not use it at full capacity. It will also make increased noise. The owner buying a pump is advised to remember that the power of the device should be 10% higher than the value obtained as a result of your calculations.

The ability of pumping equipment to meet the needs of the heating system depends on many parameters. For example, on the diameter of the pipes, maximum pressure, water temperature, coolant density:

The coolant flow Q, which passes through any section of the thermal system, is calculated in the same way as the liquid flow for boiler equipment. That is, equate the coolant flow rate to the boiler power parameters. With a boiler power of 20 kW per minute, about 20 liters pass through it.
Radiators with a power of 10 kW will flow 10 liters per minute. When calculating the water flow in each ring of the heating system, take into account the power of the batteries.
The fluid flow in the pipes is determined by the diameter of the pipelines. The smaller the diameter, the greater the resistance will appear along the path of coolant movement.

The longer the pipeline, the more powerful the injection pump for the heating system must be. This means that for every 10 meters of the heating system, 0.6 meters of pressure is needed from the pump. To ensure productive operation of a 100 m ring, a pump head of 6 m is required.

Classification of pumps for heating systems

To move energy in the heating system, two types of pumps are used:

Dry pumps. The rotor in such equipment does not come into direct contact with the energy carrier. When considering such equipment for installation in a heating system, pay attention to some of its features. The power unit of the pump with the so-called “dry” rotor does not come into contact with the energy carrier during operation. The seal located in the unit is necessary for hermetically sealing the pump from the motor. The main advantage of such pumps is their high efficiency - about 80%. Therefore, their use is advisable when constantly pumping large volumes of water. The equipment is used primarily for large retail premises, factories, factories and multi-storey buildings. Due to the rather strong noise that is created during operation, such pumps are not suitable for private homes.
Wet pumps. Their working part is in the water they pump. Using water, the engine is cooled and all its components are lubricated. Electricity flows through the stator. Thus, it is well protected from the influence of the coolant by a stainless non-magnetic glass. The main advantages characteristic of injection pumps with a rotor located in water: long operating time, infrequent maintenance, low noise, compactness and light weight, easily replaceable units, installation of the pump in the heating system is carried out directly on the pipes. Of course, among all the advantages there is also a disadvantage. Such devices demonstrate a rather low efficiency, which is 30-50%. A pressure pump with such a rotor is usually used in heating systems of houses and city apartments. It is also necessary to remember that pumps should not be used for drinking water supply or food-related tasks.

Technology for installing a pump in a heating system

Preparatory work

For installation in a heating system, it is recommended to purchase pumping equipment that includes detachable threads. If there are no such parts, you need to buy them yourself. Don't forget about the deep cleaning filter. You should also prepare a check valve to ensure normal operation of the heating system.

After selecting a pump for the heating system, it is recommended to purchase a set of special keys for its installation, shut-off valves, and a small piece of pipe. Its diameter should be similar to the diameter of the riser.

Choosing a location for the pump

When connecting a heating pump, choose a circuit so that you can periodically service the system. It is advisable that you have an approach to it. If in earlier models of “wet” pumps some spare parts could fail due to contact with water, now the systems are produced in such a way that they are not at all afraid of water. Even at various high and low temperatures. This makes it possible to install pumping equipment on the return or supply pipeline.

To increase the pressure in the discharge section, it is necessary to install a pump near the place where the tank is connected in the section of the falling pipeline. This scheme makes it possible to create high temperatures in this heating area. Before installing a pump in a heating system on a bypass pipe, check that the unit can withstand strong pressure of high-temperature water.

For more efficient operation of the “warm floor” equipment, the injection unit is placed in the heated water supply area. Thanks to this, such a problem as the occurrence of air jams will be eliminated. To restore a heating system with a membrane tank, place a bypass with a pumping unit on the return line. It is advisable to bring it closer to the expansion tank.

Pump installation rules

Correct installation of the pump in the heating system requires compliance with several rules:

Install ball valves on both sides of the pumping equipment. They are required to ensure dismantling of the pump if there is a need for its maintenance or repair work.
In a heating system, a filter is usually installed in front of the pump, which purifies the water from mechanical debris that comes with the coolant.
To remove accumulated air, install a special valve at the top of the bypass, which can be automatic or manual.
When installing a pump for flushing the heating system, you must follow the direction shown by the arrow on the pump. Remember that the direction must coincide with the direction of movement of the liquid.
In order not to damage the “wet” pump if the motor is not completely immersed in water, the device is mounted horizontally.
The pump unit terminals must be at the top.
In the heating system, gaskets must be installed on all threaded connections and pre-treated with sealant.
To use the heating system pump safely, connect it to a grounded outlet. Before installing the pump, do not forget to carry out actions related to ensuring grounding.

Pump installation principles

When installing a pump into a heating system, pay attention to the following principles:

First, drain the water and clean the system. Rinse a heating system that has been in use for a long time several times, filling it with water and emptying it to successfully clean it of contamination.
Next, install the pump in a specially designated place according to the plan. In this case, you need to look at the direction in which the energy carrier is moving. It is usually shown with an arrow on the pump.
After complete installation, they are filled with energy.
Check the system to ensure it is working properly. If there are still any errors, then at this stage they need to be corrected.
Next, unnecessary air is removed from the system using the central screw. The correctness of the actions is signaled by the escaping water, which appears from a special hole.
Bleed a manual pump each time you turn it on. Turn on the pump for 5 minutes and open the valve. This procedure is carried out several times.
The pump turns on after the pipes are filled with water. The system must be running. Remember that there should be no air left in the pipes.
In order to automate the operation of the pump and protect equipment from improper operation, buy an automatic pump. When connecting the pump to the electrical network, it is recommended to use an automatic fuse with a flag. It will perform two functions - a switch and a fuse. The fuse is installed at a distance of 50 centimeters or more from the boiler.
To install an additional pump in a heating system that already has one, keep in mind that it turns on after the thermal relay is activated. In order for both devices to work synchronously, you need to connect a second pump, also connect it to the thermal relay. Also, the additional one can be connected to the main pump through a parallel connection.

Now you know how to install a circulation pump and how to set up a heating system with two pumps. By taking into account all the rules and features when performing such work, you can forget about the problems of uneven heat distribution in the system and the formation of air gaps.

The principle of forced circulation of coolant has become an indispensable attribute of modern water heating systems. The fact that pumping water has an advantage over old gravity systems is no longer in doubt. Therefore, in most private homes, a circulation pump has already been installed or will soon be installed in the heating system. Not to mention newly installed utility networks, where it has been present since the design stage. Let's look at how to properly install the pump and connect it.

Where should the pump be installed?

The role of the pumping device in heating systems is clear to everyone. But questions often arise about the place of its installation. There are only two options here:

on the supply pipeline after the boiler and safety group;
on the return line directly in front of the boiler.

The number of supporters of installation in the return pipeline is large, but few of them can argue their position, just like those who like to install the unit in the supply. So, in practice, the installation location plays absolutely no role and does not have any effect on the operation and thermal power of the system. Also erroneous are the statements that, due to the lower return temperature, the pump will last longer, that it is easier to pull than to push, and other statements in the same spirit.

In private homes, the temperature in the supply line rarely reaches 70 ºС, not to mention the estimated 90 ºС. The exception is the cold northern regions, but there the approach to heating buildings is somewhat more serious. The circulation units themselves are designed for high water temperatures and they jam for other reasons, for example, due to the low quality of the coolant containing various impurities. From a hydraulic point of view, the circulation pump can be installed on any of the two branches; the system parameters will not change.

Then why is the unit most often placed on the return line? Everything is quite simple. In the event of some malfunction and overheating of the boiler, the water in its tank will begin to boil, and the steam-water mixture will move into the system. But the pump can only pump an incompressible medium, that is, liquid. When steam gets into it, the pumping process will stop, the coolant in the network will stop, and the boiler will explode if measures are not taken.

Important. Most modern heat generators are well protected from overheating, there is nothing to worry about. In this regard, only solid fuel boilers pose a danger, so near them it is necessary to install a return pump only.

The pumping unit is installed in the network in compliance with certain rules and requirements. For the purpose of familiarization, we list all the rules for installing pumps:

The unit can operate in both vertical and horizontal positions. During installation, the direction of fluid flow indicated by the arrow on the housing must be observed;
When installing the unit, it is necessary to observe its orientation in space. The pump must be placed so that its rotor is in a horizontal position, and not with its head up or down, as shown in the figure below;
so that the pump can be removed for maintenance or repair, shut-off valves are installed before and after it;
the unit is installed on the bypass line, and a tap is placed on the direct line, then if it is turned off, the system will be able to continue operating without forced circulation;
if a circulation pump is installed in an open heating system, then it is better to place a strainer (dirt filter) on the bypass, in front of the pump, but after the tap. In pressure networks, the mud trap must be installed in front of the bypass, and when piping a solid fuel boiler - in front of the three-way valve.

There is one subtle point. In a scheme where forced circulation of the coolant was originally conceived, installing a bypass often does not make sense. After all, without a pump, water will still not flow through the pipes, since the slopes, diameters, and so on are wrong. Therefore, you can safely build the unit into the return pipeline between the expansion tank and the boiler, as demonstrated by the diagram for installing a circulation pump in the heating system shown in the figure:

The bypass line for the pump should be installed only in systems previously designed as gravity flow. The figure below shows the installation diagram corresponding to this case:

Advice. Sometimes, instead of a ball valve, a reed-type check valve is installed in a straight line of the gravity system. While the pump is operating, it presses the valve petal with its pressure and the straight line is closed. But as soon as the electricity is turned off, the pumping unit stops, the pressure drops and the valve in the straight line opens. Thus, the system switches to natural circulation mode automatically.

Work order

To install and connect the pump yourself, you need to follow the following procedure:

if the boiler is running, then you need to stop it and give the coolant time to cool;
empty the system or boiler circuit, if possible. When the piping of the heat generator is done correctly, there is no need to drain the water from it; it is enough to cut it off from the system using the appropriate fittings;
if the system is gravity-fed, then the bypass unit with a pump and taps can be assembled in advance;
insert the unit or just the pump into the supply or return pipeline, adhering to the rules set out above;
make an electrical connection to the circulation pump.

Advice. We will not reinvent the wheel and offer a wiring diagram here. This is available in the operating instructions for any unit, even those made in China.

Further actions consist of filling the system with water and bleeding air from it using Mayevsky taps and valves. Next, it wouldn’t hurt to inspect the installation site to detect leaks. If they are not there, then you can safely put the circulation pump into operation. Do not forget to open the valves that shut off the unit and shut off the direct line if it is installed on a bypass.

Conclusion

At first glance, you might think that installing a circulation pump correctly is not difficult. This is actually true if you have experience in installation work. When there is no such experience, we advise you to carefully study the documentation supplied with the product by the manufacturer.

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The heating system will be more efficient and reliable if a circulation pump is installed. This device helps to heat a small house in a short period of time.

Installing a circulation pump in a heating system with natural circulation will guarantee its operation in case of unexpected problems.

Advantages of a heating system with a pump

Heat supply using circulation pumps has a number of advantages:

undemanding to the heating design. The presence of these devices allows you to create contours of various configurations with slopes and narrowed areas;
if the movement of coolant through the system is difficult or absent, installing a circulation pump will be a solution to the problem;
quick heating start. This device makes it possible to activate the entire system in a few minutes and thereby warm up the living quarters;
reliable operation of pumps. They are easy to use and practical, which guarantees trouble-free operation of the heating structure;
high efficiency. The efficiency of heating a home increases significantly if a circulation pump is installed in the heating system, such as in the photo.

Disadvantages of heating systems with pumps

considerable amounts of electricity bills. Using an electrically powered circulation pump means additional cash costs. How large they will be depends on the power of the device;
the operation of the device depends on the supply of electricity, but this problem with frequent shutdowns of the power supply can be solved by purchasing a diesel generator designed for a pumping group. It is also possible to install a circulation pump for heating with the required slope and then the system will be able to function for some time with natural circulation in the event of a lack of electricity;
equipment requires additional costs, and more specifically, you will need to purchase a pump, taps, filters and additional pipes for installing a bypass. The cost of these items will increase the price of the system;
the cost of installing a circulation pump when a heating system is already in place. If installation is carried out
a circulation pump for heating is connected at a separate price in accordance with technical requirements. Read also: "How to install an additional pump in a heating system - theory and practice."

Selection of a pump for a heating system

When choosing a circulation pump, one of the main parameters is the amount of thermal energy that the building needs to create comfortable living conditions for people. The most accurate ones can be done by employees of special design organizations, but if you have the necessary knowledge, you can calculate the necessary parameters yourself.

It is possible to make calculations regarding the selection of a circulation pump for heating systems using standard projects that establish requirements for European countries:

for one- to two-apartment houses, a pump power of 100 watts per “square” is sufficient;
for multi-apartment buildings this figure should be 70 watts;
if buildings do not have the necessary thermal insulation, then the required power per square meter is increased;
according to standard heating system designs, the design of a circulation pump involves using the following data in calculations (read also: " "):
for buildings with a height of more than three floors at an outside air temperature of - 25°C, a power of 97 watts per “square” of area is needed, and at a temperature of minus 30°C - 101 watts;
for one- and two-story buildings this parameter is respectively 173 and 177 watts. Read also: "".

Installing a circulation pump

The procedure and recommendations on how to properly install the circulation pump are available in the manufacturer's instructions, but it is advisable to resort to the services of professionals. Read also: "".

In order to install this device you must purchase:

threaded connections called “American” or squeegee;
check valve;
bypass line;
filter;
set of tools.

The procedure for how to properly connect a circulation pump consists of several steps:

By carrying out calculations, the required parameters of the device are determined.
The pump is mounted on the return line of the pipeline in front of the entrance to the heating boiler (more details: " "). This procedure allows you to create the most acceptable operating conditions for the heating device.
Before connecting the pump, the boiler is turned off and shut off using shut-off devices. Then a circulation device is installed on the threaded connections. To ensure quieter operation of the pump, it is advisable to place it in a horizontal plane.
Next, the filter and check valve are installed (if the system is open, it can be omitted).
Now you need to install shut-off valves, which, in case of repair, allows you to cut off the pump from the coolant.
At the final stage, the circulation pump is connected to the boiler (at the return line to the heating device). Read also: "".

Heating systems with a circulation pump are the best solution for ensuring reliable heat supply, despite the existing disadvantages (read also: " ").

Watch a video about installing a circulation pump in a heating system:

As is known, 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 line is ensured by the pressure difference that occurs when it heats up and cools down. When installing it, it is necessary to select the correct pipeline cross-section in all sections and ensure that the supply slope is in the direction of the coolant movement. 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 costs.
Simplicity of the system.

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

The problem can be eliminated in two ways - increasing the size of the internal diameter of the pipes or installing an additional element - a pump, thus ensuring forced circulation.

The first option - replacing pipes with products with a larger diameter - is not always acceptable. If the pipeline has already been installed, not everyone will want to redo it, while facing all the inconveniences inherent in the transitional repair period. This is very troublesome, labor-intensive and has a significant financial impact on your pocket.

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

An additional pump will make you dependent on the availability of electrical energy, however, its connection to the home 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

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

First you need to decide on the power of the unit. The boiler power is determined by the heat flow per unit time. And we select the power of the water pump based on the length of the pipeline. We don’t need an overly powerful device - it will create unnecessary noise and the energy costs for its operation will be unreasonably high.

There are two types of devices:

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

For a private home, wet models are chosen.

Before you install the pump for heating your home with your own hands, you need to decide where it will be inserted. Old models were usually installed with reverse feed. Modern devices allow you to install them anywhere, but for greater efficiency and uniformity of heat flow, it is best to embed it on the return pipe between the expansion tank and the boiler.

The figure shows a diagram of the connection to the heating system of the house.

The following elements are indicated here:

Boiler.
Coupling connection.
Cranes.
Controls.
Water pump.
Filter for cleaning coolant.
Expansion tank of membrane type.
Heating devices.
Water filling system.
Controls.
Thermal sensor.
Emergency controller.
Grounding.

The coolant that flows through the device 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 maintenance, the device can operate for more than 20 years.

When doing the work yourself, you need to take into account that such a scheme requires water filtration - this 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 properly install a water pump in a home heating system

Once the power of the unit has been selected and we have decided on its location, we can begin installing 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 a bypass - this is necessary so that, if necessary, the heating can operate with natural circulation. We install shut-off valves on both sides of it.
We install an air valve at the top of the bypass to de-air the circuit.
We place one shut-off valve on the main line - we close it during forced circulation.
We ensure the presence of an electrical power point to ensure the operation of the device.
Each threaded connection is made hermetically using gaskets to avoid coolant leaks.

The figure clearly shows the device connection diagram.

This bypass connection method 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. Unscrew the screw on the device housing cover and let out the air. After the water comes out, we can start the unit.

Conclusion

The use of a circulation pump in a heating system has a very beneficial effect on its efficiency. The temperature distribution along the sections of the highway is equalized, temperature adjustment of the system is much easier, and the heating time of 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, proper installation that meets all requirements and instructions. If you were careful and did everything carefully and carefully, 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, private houses, especially small ones, use a gravity heating system. However, if the house is too large and the heat from such a system is significantly insufficient, it is necessary to use specialized devices that will correct this problem. One such device is a heating circulation pump.

Heating pump in a private house

Application

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

After installing a circulation pump on a household heating system, you can be sure 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 required time (especially in winter, when the street temperature in Russian realities drops significantly).

A gravity system is not capable of heating a large room.

Almost every owner of a private house, which has a completely independent heating system, has encountered such a problem as heating the premises - not just heating, but evenly distributing 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 located nearby.

To correct the problem described above, there are two possible options: installing a 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 this method will be significant. In addition, it will require additional efforts and skills that not every owner of a private home has.

Installing a circulation pump is not difficult 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.

Installation of a circulation pump for heating

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

Kinds

As a rule, to install a pump yourself, you need to know their types.

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

“Dry” ones have absolutely no direct contact with the coolant itself, while “wet” ones inherently consist of 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 is in the form of a liquid, unlike “dry”, on the contrary, is intended for heating private homes with individual heating. Typically, such systems are made 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 choosing a suitable device difficult. However, you should not despair because of this. You just need to take a closer look at the technical characteristics of the devices and carry out the calculations.

For 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.

“Dry” coolant for heating

Installing such a device will cause excessive 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 there are no difficulties or shortcomings in the future.

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 operation of the heating system depends on the length of the pipeline.

Power

Responsible for the power of the system:

pipeline pipe diameter;
liquid (coolant) temperature;
coolant pressure.

Installation

To facilitate the integration of the device into the system, it is advisable initially, even at the selection stage, to 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 fastenings and connections for the device.

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

If you are unsure of your choice, it is strongly recommended to contact a specialist who will help you select a circulation device.

Place

The main condition that must be met when installing the pump yourself: it must be easily accessible. This is due to the fact that a breakdown, etc., can occur at any time during operation.

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

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

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

An important factor to consider is that the circulation pump must be able to withstand the strong pressure of heated water. Failure to comply with this factor may cause problems with the system as a whole.

Rules

Having studied in detail the theoretical part of installing a circulation pump, you can safely begin practice.

In order to avoid any problems, you should adhere to some technical aspects (rules) given below.

Installing a pump in a private house

Ball valves must be attached to both ends of the pump, which are necessary for servicing and dismantling the circulation pump.

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

There is no fundamental difference in the types of valve.

The heating system must have a filter. It is necessary to prevent small particles of debris from entering the device, which could damage the pump. As can be seen from this example, the water in heating systems is often not entirely clean.

To ensure the greatest degree of productivity, the pump should be installed in a horizontal position. This is especially true for “wet” coolant.

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

You should ensure that the pump mounts are clearly located on the heating chain in compliance with the rules.

Circulation pump. Video

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

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

aqueo.ru

How to properly install a pump in a heating system.

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

The continuation of the beginning of the article, which describes the fundamental principles of choosing a pump for the heating system of a private house or cottage, can be read here. When selecting a pump for a heated floor heating system, there is a slightly different method for selecting a pump. This is due to the fact that the heat distribution system in this case requires careful balancing, which means that in order to eliminate errors, a pump of slightly higher power 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 a total longer length of pipes. If the underfloor heating system is poorly developed and has two or three branches, the pump is selected with a coefficient of 1.5. Then add 0.1 to each branch if it is short and 0.2 if it is long (room area is more than 20 m2). At the same time, the developed pressure of three meters is sufficient for any underfloor heating system.

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

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 a membrane expansion 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 the 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-pump 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 its service life, and at worst, cause it to fail. The most common mistake during installation is to install the pump not in a horizontal position as in the figure. As you remember from the last article, pumps with a wet rotor are installed in heating systems of private houses. In such pumps, the impeller must float in the working environment, due to which natural lubrication and smooth running of the impeller and cooling of the pump motor occur. The branding block of the pump should 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 imperative to bleed the air by slightly loosening the shiny screw in the center of the pump motor. The air is released until water flows 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, it is not necessary to stop the pump. After a long summer inactivity, in order to avoid jamming the pump and its burnout, before starting, be sure to completely unscrew the same screw, first turning off 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, selecting, installing and starting a pump in the heating system of a private house is quite a complex 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 unfortunate professional, and such people are found at every step, you will be able to avoid unnecessary financial costs.

In order to make life in the house as comfortable as possible during the winter, you should definitely perform such an operation as installing a circulation pump in the heating system. The procedure is not too complicated and, if necessary, can be done independently. But, of course, you will first have to select equipment that suits all parameters, and also become familiar with the technology for its installation.

Benefits of use

Systems with natural coolant circulation have a number of disadvantages. Firstly, pipes with a diameter that are too large have to be installed in the house. This is necessary so that water can circulate freely through them without being held back anywhere. Secondly, when installing such a system, you have to calculate the angle of inclination of the pipes. And thirdly, equipment of this type is not very convenient to use.

Installing a circulation pump in the heating system allows you to solve all these problems. When using it, pipes can be installed thin. It is not necessary to tilt in such systems; the heat is distributed evenly throughout the rooms. Such a pump can also be installed in a system with natural coolant circulation. In this case, the house will not be left without heating.

Varieties

At the moment, only two main types of circulation pumps are produced: wet-running and conventional. The first type is not very powerful, operates silently and is usually used in country houses and cottages. Most often this is single-phase equipment.

The pump into the heating system of an apartment building is made in the same way as into the network of a private small building. However, in this case, conventional equipment is used, that is, one in which the rotor and stator are separated from the volute by a waterproof membrane. Installation is carried out on the main line in a separate room - the boiler room. The fact is that such pumps operate very noisily. This is a three-phase powerful equipment that requires, among other things, periodic lubrication.

How to choose the right one

Before you begin such a procedure as installing a circulation pump in the heating system (it is quite possible to do this with your own hands, as you will soon see), you should, of course, purchase all the necessary equipment. So, if you need a pump for a private home, you should buy a single-phase model with a “wet running” rotor. Three-phase powerful pumps are suitable for an apartment building or a very large cottage.

In any case, when purchasing, you should study the technical data sheet of the model. In this case, first of all you need to pay attention to the following parameters:

Performance. This indicator is usually expressed in liters or cubic meters. It means the volume of liquid that the pump can pass through itself in an hour. In order to choose the right model, you should know how much water is pumped into the system. The performance value should exceed this figure by approximately three times.
Pressure This parameter shows with what force the pump can draw in coolant. The device should easily cope with pumping water along all heating curves, if necessary, lift it to the upper floors, etc. For example, for an apartment building you will need to purchase equipment with a pressure of about 20 m. For a cottage, a less powerful model is also suitable.

Circulation pumps with automation are considered very convenient to use. This model can be set on a timer, and it will turn itself off and on when necessary.

Basic installation rules

Most often, a circulation pump is installed in a heating system through a bypass pipe called a bypass. In this case, when there is a power outage, the system switches to natural circulation without any problems. In order to let water flow directly, you just need to close the bypass valves.

The circulation pump is installed only on the return pipe between the last radiator and the heating boiler. This is due to the fact that the pump does not push water, but sucks it in. In addition, under the influence of very hot coolant in the supply pipe, its mechanisms quickly fail.

Only a pressure gauge, thermometer and pressure relief valve are installed between the pump and the boiler. A filter is mounted directly next to it on the bypass. In any heating system there is a lot of different debris: scale, silt, etc. Without a filter, the pump impeller will quickly clog, as a result of which it will simply fail.

When performing an operation such as installing a circulation pump in the heating system of a private home, be sure to follow these recommendations:

If the connection is made into an already existing network, the water must first be drained from the mains. The pipeline must be thoroughly flushed.
After completing the full installation cycle, the system is filled with water again.
All connections must be sealed with sealant.
The final step is to open the central screw on the pump housing and release excess air from it.

How to install

Do-it-yourself installation of a circulation pump in a heating system is carried out as follows:

A piece is cut out in the intended section of the return pipe, the length of which should be equal to the width of the bypass.
Tees are installed on both free ends.
These elements are connected by a piece of pipe with a valve built into it.
Each tee is connected to an L-shaped piece of pipe with nuts at the end and valves.
A filter is installed on one of the L-shaped pieces (between the valve and the pump).
The nuts are screwed to the pipes of the circulation pump.

The device should be installed in such a way that the coolant subsequently moves in the direction indicated by the arrow marked on the body. In addition, the place for its insertion should be chosen in such a way that access to it is not difficult later.

How to connect to the mains

When using the method described above for installing the circulation pump, its shaft will be located in a horizontal position. In this case, air will not accumulate in it, preventing lubrication of the bearings. Among other things, when installing the device, be sure to ensure that it is located on top.

Connect the electric pump to the electrical network in compliance with all required safety rules. The power cable must be equipped with a plug or switch. The minimum distance between the axes of the contacts is 3 mm. Cable cross-section - no less than 0.75 mm. Of course, the pump must be connected to a grounded outlet.

One or more?

Typically, in a private home, only one circulation pump is installed in the heating system. The power of modern equipment of this type is quite enough to ensure a sufficient flow rate of the coolant. Two pumps are included in the system only if the total length of the pipes exceeds 80 m.

Is it possible to install without a bypass?

A circulation pump is usually installed on the bypass pipe in an open-type heating system. At the same time, if necessary, the owners of a country house have the opportunity to switch the network to natural coolant current. If the system is designed without slopes, the pump can be installed in a pipe without a bypass. In this case, the installation is carried out directly into the return line. In this case, shut-off valves must also be installed. This will allow you to easily remove the device for repair or replacement without having to drain the water from the system.

A procedure such as installing a circulation pump in a heating system without a bypass is usually performed only if the house has an alternative source of electricity. This could be, for example, a modern gasoline or diesel generator. In this case, in the event of a sudden power outage, the building will not be left without heating.

How to install on polypropylene

Now let's see how the circulation pump is installed in the heating system in this case. Polypropylene is a fairly light and easy-to-use material. In this case, connect the equipment like this:

Special connections (3/4) are soldered to the ends of the line.
Next, taps are attached to them using flax.
Then the latter are connected to the pump assembly using clamps.

Operating rules

Modern circulation pumps are reliable and have a long service life. But, of course, sometimes this equipment also fails. Such a nuisance can happen, for example, due to:

too much or too little water supply,
operation without coolant in the system,
in case of prolonged downtime,
when the water is heated too much (over +65 degrees).

How to dismantle

So, we have looked at how to install a circulation pump in a closed and open heating system. Now let's discuss how to remove this equipment in case it needs to be repaired or replaced. This procedure consists of just a few steps:

the pump is de-energized,
the valves on the bypass are closed,
the valve on the main line opens,
the fastening nuts are unscrewed.

If the pump has been installed in the system for a long time, it will most likely be stuck. Therefore, you will have to knock it out by tapping it with a mallet.

It is unlikely that you can repair the pump yourself if the owner of the house does not have sufficient experience in this matter. Most likely, you will have to take it to a repair shop. But most often, owners of country buildings still install new equipment into the system; fortunately, pumps today are not too expensive.

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