Where is the pump located in the heating system. Scheme for connecting the circulation pump to the heating system - basic installation rules. Tools and Consumables

How to properly install the pump in a heating system that is already operating using natural circulation?

How to install a pump in a heating system designed for a new home? What shut-off valves can be used, and which ones should not be used? Let's try to find out.

Are there any subtleties in the organization of forced circulation in the heating circuit? Let's find out together.

Why you need a pump

Let's start with the main thing: we will find out whether it is necessary to install a pump for heating, if it has been working properly for many years without it. What will change?

The inertia of the system will sharply decrease. If, with natural circulation, at least an hour can pass between the ignition of the boiler and the noticeable heating of the radiators far from it, then with the forced injection of the coolant, the house will begin to warm up in a matter of minutes.
The temperature of the heaters will even out. A feature of any gravity system is the unequal heating of radiators closest to the boiler and farthest from it. The coolant, which circulates rather slowly, has time to cool down before it describes a full circle along the contour.
If during laying work somewhere they are mounted with a negative slope, this will not affect the circulation. Installing a pump in a heating system will dramatically increase the pressure drop, and the air pockets that are inevitable with a counterslope will no longer be a hindrance.

However: continuous murmuring with air in the circuit can be annoying. Functionality is functionality, but it is still better to take care of the ability to bleed air from everywhere.

Do systems with a circulation pump have negative sides?

The price of a kilowatt-hour of electricity is steadily growing, and the pump consumes it. Although a little - no more than 100 watts at maximum speed.

This device has three operating modes: 55, 70 and 100 watts.

If the heating system is designed only for forced circulation, the very first long power outage will prepare an extremely unpleasant surprise for the owner of the house. Overheating of the coolant by the boiler can cause the destruction of the heating circuit, and stopping the circulation can lead to subsequent defrosting.

If by definition it is problematic to do something with the consumption of electricity by an electric pump, then the second problem is solvable. Moreover, the solution is obvious: when designing a system, it is necessary to include in the project the ability to work due to natural circulation.

We put the pump

Position relative to the horizon

How to properly install the pump for heating in terms of its service life? Surely there are factors that can lead to accelerated wear of the mechanics.

The instruction is related to the peculiarities of the operation of the mechanical part of the device. The design of a heating pump used to create individual heating systems of moderate power implies continuous cooling of the rotor and shaft with bearings by a circulating coolant.

To prevent air pockets from leaving the bearings without lubrication and cooling, the motor shaft must be located strictly horizontally.

Correct and incorrect positions of the pump.

Water filtration

It is highly desirable to install a sump before the pump. Its function is to filter out the inevitable sand, scale and other abrasive particles that destroy the impeller and bearings of the circulation pump.

Since the diameter of the tie-in for the pump is usually small, an ordinary coarse filter is quite suitable. The keg designed to collect suspensions should be directed downwards so that it will not interfere with the circulation of water, even when it is already partially filled.

Attention: on most filters, the arrow indicates the recommended direction of water circulation during installation. Yes, the filter will perform its function even if installed incorrectly; however, it will have to be cleaned much more often, and it will be much more difficult to remove ALL the sediment.

Location of the pump in the circuit

Formally, modern pumps work equally well both on the supply and on the return in any part of the heating circuit. However:

The higher the coolant temperature, the lower the resource of bearings and all plastic parts of the device. From this point of view, embedding it is still on the return pipeline, directly in front of the boiler.
The expansion tank is recommended to be mounted on the section of the circuit with the coolant flow as close to laminar as possible. After the pump, the flow will inevitably be turbulent. Hence the second amendment: the circulation pump crashes in front of the boiler and after expansion tank.

The optimal condition for an expansion tank is a water flow with a minimum of turbulence. In front of the pump, the jet in the circuit is almost laminar.

Do you remember our thoughts about the fact that it is highly desirable that the heating could work even when the electricity is turned off? Albeit with less efficiency?

How to install a heating pump with your own hands so that it does not interfere with natural circulation?

Let's think out loud for a bit. The gravity system is characterized, first of all, by the minimum difference between supply and return. Therefore, for an acceptable circulation rate, a minimum hydraulic resistance of the circuit is required.

What increases it?

Turns and bends of the contour.
ANY shut-off valve.

By the way: it is from this point of view that only modern ball valves should be used in any autonomous heating system. Unlike their screw counterparts, they provide minimal resistance to the flow of water in the open. To understand why this is so, take a look at this type of open valve.

When the valve is open, the lumen in it does not differ from the lumen of the pipe. In addition, there are no bends and turns where the drop is lost.

Reduced pipe diameter.

The pump cuts parallel to the main circuit without opening it. For the operation of the gravity system, the diameter of the circuit must be at least DN32; the diameter of the pump tie-in is much smaller.
Between the tie-ins, a valve is installed that completely closes the main circuit when the pump is running. Otherwise, it will work, chasing water in a circle between the tie-ins.
Before the pump and after it, valves are mounted that allow you to cut off the faulty device and dismantle it in the event of a malfunction without resetting the entire heating.

Such a tie-in scheme has a weak point - the need to manually switch from the pump to the bypass when the light is turned off. Yes, if you are at home, it is difficult not to notice a power outage; but what if all your households are missing?

The solution is a check valve. In normal mode, it closes; as soon as the pressure in the main circuit before the pump has become greater than after it, the valve is open. As always, there are subtleties.

All spring check valves exhibit a noticeable head loss: the water must overcome the resistance of the spring. Which, of course, goes against our goals. The outlet is a ball valve mounted horizontally. Its resistance to water flow will be minimal, as will the pressure required to open the valve.

The circuit in the photo will switch from forced to natural circulation without your participation.

Installing a pump in a heating system, how to properly install pumping equipment with your own hands: instructions, photo and video tutorials, price

Installing a circulation pump is a technology that is understandable to everyone

The installation of a circulation pump in dwellings with an individual heating system ensures uniform and high-quality distribution of heat throughout all the premises of the house.

Circulation pumping units - device and principle of operation

In closed heating systems it is required forced circulation hot water. This function is performed by circulation pumps, which consist of a metal motor or a rotor attached to a housing, most often made of stainless steel. The ejection of the coolant is provided by the impeller. It is located on the rotor shaft. The entire system is driven by an electric motor.

Also in the design of the described installations there are the following elements:

shut-off and check valves;
the flow part (usually it is made of a bronze alloy);
thermostat (it protects the pump from overheating and ensures the economical operation of the device);
work timer;
connector (male).

The pump, when installed in a heating system, draws in water, and then supplies it to the pipeline due to centrifugal force. The specified force is generated when the impeller produces rotational movements. The circulation pump will work efficiently only if the pressure it creates can easily cope with the resistance (hydraulic) of the various components of the heating system (radiator, pipeline itself).

Types of pumps and their features

Various circulation units can be mounted in the heating system of a private house. They are divided into two large groups. The circulation pump can be "dry" or "wet". When installing devices of the first type with your own hands, it should be borne in mind that their motor is separated from the working part by sealing rings. They are made from stainless steel. During the start-up of the installation, the process of movement of these rings begins, which leads to the sealing of the connection with a water (very thin) film. The latter is located between the seals.

Circulation pumping unit

High-quality sealing in this case is ensured due to the fact that the pressure in the external atmosphere and in the heating system itself is characterized by different indicators. A “dry” pump makes quite loud sounds during operation. In this regard, its installation is always carried out in a specially soundproofed separate room of a private house. The efficiency of such a circulation unit is at the level of 80%.

There are three types of "dry" devices for connection to the heating system: horizontal, vertical, block. The electric motor in the units of the first type is placed horizontally. The discharge pipe is attached to them on the body of the apparatus, and the suction pipe is mounted on the shaft (on its front side). IN vertical installations nozzles are on the same axis. And the engine in this case is located vertically. In block circulating units, heated water exits radially, and enters the system in an axial direction.

Caring for a "dry" unit is objectively difficult. Its elements must be regularly lubricated with a special compound. If this is not done, the end seals will quickly fail, causing the pump to stop. In addition, in a private house, “dry” devices should be placed in rooms where there is no dust. Its turbulence during equipment operation often causes pump depressurization.

In "wet" units, the coolant itself performs the function of lubrication. The impeller and rotor of such installations are immersed in water. "Wet" devices are much less noisy, they are easier to mount with your own hands. And their maintenance is simpler compared to "dry" pumps.

The body of the "wet" installation, as a rule, is made of brass or bronze. Between the stator and the rotor there must be a special separator made of stainless steel. It is called a glass. It is necessary to give the required tightness to the engine (more precisely, its elements under electrical voltage). It is the “wet” units that are most often mounted in a private house in the heating system.

They do a good job of heating relatively small areas. For large objects, such devices are not suitable, since their performance usually does not exceed 50%. The low efficiency of "wet" installations is due to the impossibility of high-quality sealing of the glass placed between the stator and the rotor.

On the choice of equipment and the rules for its independent calculation

The key indicator that determines the efficiency of the circulation pump is its power. For a domestic heating system, you do not need to try to purchase the most powerful installation. It will only hum strongly and waste electricity.

Mounted circulation pump

indicator of hot water pressure;
section of pipes;
productivity and throughput of the heating boiler;
coolant temperature.

The flow of hot water is determined simply. It is equal to the power of the heating unit. If you, for example, have a 20 kW gas boiler, no more than 20 liters of water will be consumed per hour. The pressure of the circulation unit for the heating system for every 10 m of pipes is about 50 cm. The longer the pipeline, the more powerful the pump must be purchased. Here you should immediately pay attention to the thickness of tubular products. The resistance to the movement of water in the system will be stronger if you install small pipes.

In pipelines with a diameter of half an inch, the flow rate of the coolant is 5.7 liters per minute at the generally accepted (1.5 m / s) speed of water movement, with a diameter of 1 inch - 30 liters. But for pipes with a cross section of 2 inches, the flow rate will already be at the level of 170 liters. Always select the diameter of the pipes in such a way that you do not have to overpay extra money for energy resources.

The flow rate of the pump itself is determined by the following ratio: N/t2-t1. Under t1 in this formula is understood the temperature of the water in the return pipes (usually it is 65–70 ° С), under t2 - the temperature provided by the heating unit (at least 90 °). And the letter N indicates the power of the boiler (this value is available in the equipment passport). The pump pressure is set according to the standards accepted in our country and Europe. It is believed that 1 kW of power of the circulation unit is quite enough for high-quality heating of 1 square of the area of a private dwelling.

Do-it-yourself schemes and standards for the installation of pumping equipment

Installation of circulation pumps is carried out in two ways. The first connection scheme of the unit is two-pipe. This connection method is described by a high temperature difference in the system and a variable flow rate of the coolant. The second scheme is one-pipe. In this case, the temperature difference in the heating system will be insignificant, and the carrier flow rate will be constant.

Installed circulation pump

Do-it-yourself connection of the pump is carried out according to the instructions that are attached to the unit. It also indicates the installation procedure for a functional reinforcing chain. Be sure to drain all water from the system before installing the pump. Often there is a need to clean it. During the operation of the heating boiler, a lot of debris is collected on the inner surfaces of the pipes, which worsens the technical performance of the system.

Experts advise placing the circulation unit in front of the boiler - on the return line. This is done in order to eliminate the risk of boiling of an open-type heating system due to the vacuum that is created when the pump is installed at the supply. In addition, if you install the circulation unit on the return, its trouble-free operation will be significantly increased due to the fact that it will operate at lower temperatures.

The procedure for installing the pump itself looks like this:

You make a bypass (in professional slang - a bypass) in the area where the pump will be placed. The bypass diameter is always taken slightly smaller than the cross section of the main pipe.
Mount (strictly horizontally) the shaft of the pumping device, place the terminal box on top.
Install ball valves on both sides of the pump.
Install a filter. It is not recommended to operate the equipment without this device.
Place an automatic (optionally manual) vent valve above the bypass line. This device will allow you to clean the air pockets that regularly form in the system.

Further, valves (shut-off) are installed at the inlet-outlet section of the circulation unit. For an open heating system, an expansion tank is additionally required (not installed in closed complexes). Final stage installation work- treatment with a good sealant of all, without exception, the connection points of various elements of the system.

Installing a circulation pump - all the tricks of the procedure Video

Features of installing a circulation pump, which increases the efficiency of the heating systems of private houses, a diagram and a video of connecting it with your own hands.

How to install a circulation pump

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 liquid medium without pressure change. 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.

Can be installed in the return or direct pipeline after/before the boiler up to the first branch

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.

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.

Scheme of installation of a circulation pump in a system with natural circulation

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.

Electrical connection diagram of the circulation pump

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.

Where to connect the power cable

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.

How to connect a circulator to electricity through a stabilizer

Installation of a circulation pump: diagrams, installation rules

How should the installation of the circulation pump be carried out, its piping for systems of various types, how to connect it to electricity.

Installing a pump in a heating system: an analysis of the basic installation rules and tricks

For uniform distribution of heat in a house equipped with an autonomous heating system, various models of circulation pumps are used. This equipment provides forced circulation of the coolant through pipes and batteries. At the same time, radiators are heated simultaneously in all rooms, regardless of their distance from the heating boiler. The heating pump is being installed in accordance with the manufacturer's instructions, which describes in detail the installation process of this equipment. Several approaches have been tried in practice. pumping units in the heating system of a private house. In each case, the owner of the facility chooses the most suitable option, taking into account the type of boiler and expansion tank used, the type of heating system, and the presence of additional elements.

Selecting the right unit

When choosing a pump, attention is paid to two main parameters: the force of the coolant flow and the hydraulic resistance that it overcomes when creating pressure. At the same time, the characteristics of the purchased circulation pump should be 10-15% lower than the calculated values. If you install a powerful pump in the heating system, you may encounter the problem of increasing power consumption, excessive noise, and rapid wear of equipment parts. A low-power pump will not be able to provide the pumping of the coolant in the required volume. Many models of modern circulation pumps are equipped with electronic or manual motor shaft speed controllers. The highest efficiency value is achieved at maximum shaft speed.

Thermal valves, installed in many heating systems, regulate the temperature in the room in accordance with the specified parameters. The valve closes when the temperature rises. This increases the hydraulic resistance and, accordingly, increases the pressure. These processes are accompanied by the appearance of noise, which can be eliminated by switching the pump to low speeds. Pumps with built-in electronics that can smoothly regulate pressure drops depending on changes in the amount of water cope with this task more efficiently.

Determining the location of the pump insertion into the system

Correct operation of pumping equipment is possible provided that the location of its insertion into the pipeline is correctly determined. The pump must force the coolant to circulate through the heating system, thereby ensuring the rapid advancement of hot water from the boiler to all batteries installed in the house. This is how a typical connection diagram for a heating circulation pump looks like, which is most often used by specialists in practice.

Typical scheme for connecting a pump that provides forced circulation of the coolant to an autonomous heating system of a private house or country cottage

Its main elements are a boiler (1), a membrane tank (7), a pump (5), heating radiators (8), as well as:

socket connection (2);
valves (3);
signaling system (4);
strainer (6);
line for feeding the heating system with water (9);
management (10);
temperature sensor (11);
emergency sensor (12);
grounding (13).

In autonomous heating systems, sealed pumps with a "wet" rotor of a non-throttling type are usually installed. These models do not require additional lubrication of parts and replacement of gaskets. These functions are performed by the coolant. The water pumped by the pump also cools its elements, and also ensures the silent operation of the equipment. The body of a throttleless pump is made by manufacturers of cast iron, and the rotor is made of steel or wear-resistant plastic. The device, which does not require intensive maintenance, is able to work for 20 years or more.

Basic installation rules

Any equipment is supplied accompanied by the manufacturer's instructions, which reflects all the important information about its device, the principle of operation and installation rules. By reading this carefully white paper, you can understand the basic rules for handling it.

Very important when self installation select the desired position of the product relative to the horizon. The location of the motor shaft must be strictly horizontal. Otherwise, air pockets may form, leaving the bearings without lubrication and sufficient cooling. This will lead to rapid wear of parts and an early breakdown of equipment. There is an arrow on the pump housing, in the direction of which the coolant should move in the system.

Options for the correct and incorrect location of the circulation pump with a "wet" rotor. It is strictly forbidden to place the equipment as shown in the bottom row.

The need for water filtration

A sump is installed in front of the pump, the function of which is to filter the coolant. The mud filter retains abrasive particles, sand, scale and other contaminants that have entered the water. If such elements get inside the pump, the impeller and bearings may be destroyed. Since the diameter of the tie-in for mounting the pump is small, an ordinary coarse filter can be used. Please note that the barrel, which serves to collect various suspensions, is directed downwards. In this position, the filter will not interfere with the circulation of water. With partial filling, the barrel will not lose the ability to pass the coolant.

Important! Most filters are equipped with an arrow indicating the correct direction of water flow in the circuit. If you ignore the direction of the arrow, you will have to clean the sump much more often.

Location of the pump in the heating circuit

In principle, most models of modern pumps are able to work equally well both on the supply and on the return. The equipment can be embedded in any part of the heating circuit. In this case, it should be borne in mind that the duration of the operation of the bearings and plastic parts of the device will depend on the temperature of the coolant. Therefore, it is better to embed the equipment on the return pipeline after the expansion membrane tank and before the heating boiler.

One of the options for the correct insertion of the circulation pump into the pipeline of the heating system of a private house with a circuit length of not more than 80 meters

What is the bypass for?

The circulation pump is a volatile device. In the event of a power outage, the heating system must operate under natural circulation conditions. To do this, it is necessary to minimize the resistance in the circuit by reducing the number of bends and turns, as well as using modern ball valves as shutoff valves. When open, the clearance in the ball valve matches the diameter of the pipe.

The circulation pump is installed on the bypass, which is cut off from the main system using two ball valves. Such placement of the equipment allows it to be repaired or replaced without damage to the heating system of the house. In the off-season, the heating system can operate without a pump, which is shut off using the same ball valves. When frost intensifies, the pump is put into operation, opening the shut-off valves along its edges and closing the ball valve on the main circuit. This is how the direction of the coolant flow is adjusted.

Installation of the circulation pump on the bypass (bypass pipe) using three ball valves ensures the flow of the coolant in the desired direction

Electrical connection

If the heating system is designed according to the principle of forced circulation, then in the event of a power outage, the pump must continue to operate from a backup power source. Therefore, it is recommended to install an uninterruptible power supply that will allow the heating system to function for a couple of hours. This time is usually enough for specialists to eliminate the cause of an emergency power outage. External batteries connected to a backup power source can extend the autonomous operation of the equipment.

Connecting the pump to an uninterruptible power supply (UPS), which is additionally reinforced by three battery units connected in series into a single circuit

When making the electrical connection of the equipment, it is necessary to exclude the possibility of moisture and condensate getting into the terminal box. A heat-resistant cable is used if the coolant is heated in the heating system by more than 90 ° C. The power cable must not come into contact with the pipe walls, the engine, or the pump housing. The power cable is connected to the terminal box from the left or right side, while the plug is rearranged. With a lateral location of the terminal box, the cable is brought in only from below. And yes, grounding is a must!

Operation check and commissioning

After completion of installation work, the heating system is filled with water. Then the air is removed by opening the central screw located on the cover of the pump housing. The water that appears will signal the complete removal of air bubbles from the device. After that, the pump can be put into operation.

After reading the instructions and reading this article, you can carry out the installation work yourself. If you do not understand how to install a pump for heating, then invite a professional craftsman.

Installing a pump for heating: how to put a pump in a heating system

Tips for installing a circulation pump for heating. How to properly install the pump for heating: analysis of all the nuances, technical problems and much more. Video and photo.

One of the main types of equipment that is used in the heating system of a private house is a circulation pump. This device allows you to more efficiently transport the coolant through the system, which will contribute to uniform heating of the premises. In our article, we will describe why an additional pump is needed in the home heating system, get acquainted with the scheme and place of its installation, use in the Underfloor heating system.

Is it necessary and in what cases

Many owners of suburban real estate, and especially two-story houses, are interested in the question of installing an additional circulation pump in the heating system. They come to this conclusion after uneven heating of the radiators in the premises, provided that the boiler has sufficient power. If the temperature difference between the boiler and the coolant in the pipelines exceeds 20 degrees, then it will be necessary to remove air pockets or put the existing pump at an increased speed.

Installation of additional pumping equipment is necessary in the following cases:

When adding an additional circuit to the heating system, and especially when the length of the pipes exceeds 80 meters;
For uniform movement of the coolant in pipelines.

Important! In case of incorrect calculations of the heating system, the installation of additional equipment will lead to a decrease in the efficiency of the heating system.

Before installing an additional pump, balance the heating system using balancing valves

An additional pump in the heating system may not be needed if it is balanced with balancing and regulating valves, so before buying additional equipment, bleed the batteries and add water to the system. If everything works fine, then there is no point in installing an additional pump.

hydraulic separator

If there is a need to install an additional pump, then another device must be included in such a heating system - a hydraulic separator. In the list of terms used, a hydraulic separator can also be called an anuloid or a hydraulic arrow.

Such devices are recommended for use in heating systems where the heating medium is heated using boilers. long burning. The fact is that the heating devices in question can operate in several phases (fuel ignition, combustion process and attenuation), and each of these phases must maintain a certain combustion mode.

Installing a hydraulic arrow in the heating system allows you to create a certain balance in the work of heat and heating the system. The anuloid itself is made in the form of a pipe with four outlet pipes. The main functions of this device include:

Automatic removal of accumulated air;
Capturing sludge particles (works as a dirt trap).

Note! From these characteristics, it can be understood that the hydraulic separator is considered an important device in the heating system, so it must be installed without fail in the presence of a pump.

Heating in a private house performs many functions that must be implemented regardless of the coolant flow rate with possible pressure drops in pipelines. It is rather difficult to achieve efficient operation of the system, because the liquid enters the pipeline circuits from one source of thermal energy - the boiler, which will ultimately lead to an imbalance in heating. To prevent such situations, the hydraulic separator serves, it performs the function of decoupling.

Where to put

In an autonomous heating system of a private house, it is recommended to install circulation pumps with a wet rotor that rotate without the use of special lubricants. The coolant and lubricating element here is the coolant. When installing such a device, the following rules must be observed:

The pump shaft must be in a horizontal position with respect to the floor surface;
The movement of water flow in the system must match the direction of the arrow on the device;
To prevent liquid from entering the pump terminals, the box must be mounted on the top or side of the equipment.

According to some users, it is better to install the pump on the return pipeline. Here, the coolant temperature is minimal, which will increase the life of the device, but not all experts agree with this statement. The fact is that the pump is designed for operation in a coolant medium, the temperature of which can reach 110 degrees.

Note! The only requirement for installing the pump is the convenience of its maintenance, that is, such a device can be mounted between the boiler and heating radiators on the direct or return pipeline. Boosting equipment must not be installed between batteries.

Installation scheme

In practice, two schemes for installing a circulation pump in a single-pipe and two-pipe system heating. Before carrying out installation work, carefully study the attached instructions. At the preparatory stage of the work, water is drained from the system and the pipes are cleaned of contaminants by additional pumping of the liquid. The pump is installed according to the attached scheme, then the coolant is poured into the circuit and the unit is turned on.

As we have already said, it is best to install the pump on the return line using a tap or, as it is also called, a bypass. Such a device is necessary to shut off the water and replace the pump in the event of a breakdown. The diameter of the outlet pipe must be smaller than that of the central pipeline.

At each end of the bypass, in front of the inlet and after the outlet of the pump, valves are installed for emergency shutdown of the coolant. Another valve is installed on the central line to direct the flow of fluid through the pump. Before entering the pumping equipment, a special filter is fixed, which will accumulate harmful particles in the water.

with underfloor heating

Note! In the "Heat floor" system, the circulation pump is installed in a horizontal position after the mixing unit in the section of the supply pipeline. In some wiring diagrams, several such devices are installed, each of which will pump liquid within one floor.

Pump installation diagram in the "Warm floor" system

During the filling of the system with coolant, it is not always possible to get rid of the air present here. Accumulated gases often block the movement of fluid, and not every manifold can be used as a bleed valve. To solve this problem, the circulation pump has a special outlet valve, made in the form of a disk.

To release the accumulated gases, you need to turn this part with a screwdriver counterclockwise. After water is supplied from the slot, the disk is twisted and the pump is started again. This procedure is repeated several times in a row.

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 installed 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

Where to put

It is recommended to install a circulation pump after the boiler, before the first branch, but it does not matter on the supply or return pipeline. 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.

Can be installed in the return or direct pipeline after/before the boiler up to the first branch

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 terms of tying, and the correct orientation of the rotor in space. Nothing else matters.

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).

Installing a circulation pump in a forced circulation system

natural circulation

Scheme of installation of a circulation pump in a system with natural circulation

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

Power connection

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

Electrical connection diagram of the circulation pump

Where to connect the power cable

How to connect a circulator to electricity through a stabilizer

Installation of a circulation pump: diagrams, installation rules

How should the installation of the circulation pump be carried out, its piping for systems of various types, how to connect it to electricity.

Installing a pump in a heating system: an analysis of the basic installation rules and tricks

For uniform distribution of heat in a house equipped with an autonomous heating system, various models of circulation pumps are used. This equipment provides forced circulation of the coolant through pipes and batteries. At the same time, radiators are heated simultaneously in all rooms, regardless of their distance from the heating boiler. The heating pump is being installed in accordance with the manufacturer's instructions, which describes in detail the installation process of this equipment. In practice, several methods have been tested for locating pumping units in the heating system of a private house. In each case, the owner of the facility chooses the most suitable option, taking into account the type of boiler and expansion tank used, the type of heating system, and the presence of additional elements.

Selecting the right unit

Determining the location of the pump insertion into the system

Typical scheme for connecting a pump that provides forced circulation of the coolant to an autonomous heating system of a private house or country cottage

Its main elements are a boiler (1), a membrane tank (7), a pump (5), heating radiators (8), as well as:

socket connection (2);
valves (3);
signaling system (4);
strainer (6);
line for feeding the heating system with water (9);
management (10);
temperature sensor (11);
emergency sensor (12);
grounding (13).

Basic installation rules

Any equipment is supplied accompanied by the manufacturer's instructions, which reflects all the important information about its device, the principle of operation and installation rules. After reading this technical document carefully, you can understand the basic rules for handling it.

It is very important for self-installation to choose the desired position of the product relative to the horizon. The location of the motor shaft must be strictly horizontal. Otherwise, air pockets may form, leaving the bearings without lubrication and sufficient cooling. This will lead to rapid wear of parts and an early breakdown of equipment. There is an arrow on the pump housing, in the direction of which the coolant should move in the system.

Options for the correct and incorrect location of the circulation pump with a "wet" rotor. It is strictly forbidden to place the equipment as shown in the bottom row.

The need for water filtration

Location of the pump in the heating circuit

One of the options for the correct insertion of the circulation pump into the pipeline of the heating system of a private house with a circuit length of not more than 80 meters

What is the bypass for?

Installation of the circulation pump on the bypass (bypass pipe) using three ball valves ensures the flow of the coolant in the desired direction

Electrical connection

Connecting the pump to an uninterruptible power supply (UPS), which is additionally reinforced by three battery units connected in series into a single circuit

Operation check and commissioning

Installing a pump for heating: how to put a pump in a heating system

Tips for installing a circulation pump for heating. How to properly install the pump for heating: analysis of all the nuances, technical problems and much more. Video and photo.

Heating pump connection diagrams: installation options and step-by-step instructions

Uniform distribution of heat in a house with an autonomous heating system is due to the model of the pumping device used. Due to this equipment, the forced movement of a warm medium through pipes and radiators is ensured.

To determine which heating pump connection scheme will be optimal for self-implementation, many details have to be taken into account.

Pros and cons of using a heating pump

A couple of decades ago, in the private sector, houses were equipped with gravity-flow heating. A wood stove or gas boiler was used as a heat source. For overall circulation devices, there was only one area of \u200b\u200bapplication - district heating networks.

Today, manufacturers of heating equipment offer smaller units with the following advantages:

The speed of movement of the thermal carrier has increased. The heat generated by the boiler quickly enters the radiators. Due to this, the process of warming up the premises was significantly accelerated.
The higher the speed of movement, the higher the throughput of the pipes. This means that the same amount of heat can be delivered to the rooms with a smaller diameter pipe.
Water heating schemes have undergone significant changes. The highway can be laid with the slightest slope. Also, the complexity and length of the line can be anything. The basic rule is the rational choice of the heating pump based on the required power.
With the help of a household circulation device, it became possible to organize underfloor heating in the house, as well as an efficient closed-type heating system.
It became possible to hide the entire heating line of communications passing through the rooms, which is not always well combined with the design of the room. Quite common options for laying pipes behind stretch ceilings, in walls or under flooring.

The disadvantages of pumping systems include the conditionality of functioning from the supply of electricity and its consumption by the pumping apparatus during the heating season.

Therefore, if the site is often deprived of power supply, it would be advisable to install a device to provide electricity in uninterrupted mode. The second disadvantage is not critical and can be eliminated by proper selection of power and device model.

Choice of insertion point of the device into the system

The installation of a circulation pump is supposed to be in the area immediately after the heat generator, not reaching the first branching line. The selected pipeline does not matter - it can be either a supply or a return line.

Where can I put the pump

Modern models of household heating units made of high quality materials can withstand temperatures up to a maximum of 100 ° C. However, most systems are not designed for higher heating of the coolant.

Its performance will be equally effective both on the supply and on the return branch. And that's why:

The density of water when heated to 50 ° C is 987 kg / m 3, and at 70 degrees - 977.9 kg / m 3;
The heating unit is capable of generating a hydrostatic pressure of 4-6 m of water column and pumping almost 1 ton of coolant per hour.

From this we can conclude: an insignificant difference of 9 kg / m 3 between the static pressure of the moving coolant and the return does not affect the quality of space heating.

Are there exceptions to the rules?

As an exception, inexpensive direct combustion boilers operating on solid fuels can serve. Their device does not provide for automation, therefore, at the moment of overheating, the coolant begins to boil.

Problems begin to arise if the electric pump installed in the supply line begins to fill with hot water with steam. The heat carrier penetrates through the housing with the impeller and the following occurs:

Due to the action of gases on the impeller of the pumping device, the efficiency of the unit decreases. As a result, the coefficient of the circulation rate of the heat carrier is significantly reduced.
An insufficient amount of cold liquid enters the expansion tank, located near the suction pipe. The overheating of the mechanism increases and even more steam is formed.
A large amount of steam, when it enters the impeller, completely stops the movement of warm water along the line. Due to the increase in pressure, the safety valve is triggered. Steam is released directly into the boiler room. An emergency is being created.
If the firewood is not extinguished at this moment, the valve will not be able to cope with the load and an explosion will occur.

In practice, from the initial moment of overheating to the operation of the safety valve, no more than 5 minutes pass. If you mount the circulation mechanism on the return branch, then the length of time for which steam enters the device increases to 30 minutes. This gap will be enough to eliminate the heat supply.

From this we can conclude that it is impractical and even dangerous to install a circulation device on the supply line. Pumps for solid fuel heat generators are best mounted in the return pipeline. However, this requirement does not apply to automated systems.

Heating with a group of individual lines

If the heating system is divided into two separate lines, heating the right and left sides of the cottage or several floors, it would be more practical to install an individual pump for each of the branches.

When installing a separate device for the heating line of the second floor, it becomes possible to save money by adjusting the required mode of operation. Due to the fact that heat has the ability to rise, it will always be warmer on the second floor. This will reduce the rate of circulation of the coolant.

The tie-in of the pump is carried out in a similar way - in the area located immediately after the heat generator to the first branch in this heating circuit. Usually when installing two units in two-story house fuel consumption for maintenance of the upper floor will be significantly less.

Schemes for different types of systems

Initially, it is necessary to determine the tie-in zone of the circulation device. With its help, the process of active movement of the liquid is carried out - the flow passes through the boiler and is forcibly directed to the heating radiators.

For the location of the domestic pump, it is necessary to determine the most convenient area so that it can be easily serviced. At the supply, it is installed after the safety block and shut-off valves of the boiler.

On the return pipeline, the pump is placed after the expansion tank in front of the heat generator.

Due to the presence of various mechanical impurities in the water, for example, sand, problems may arise in the operation of the pumping mechanism. Particles contribute to the jamming of the impeller, and in the worst case, to stopping the motor. Therefore, directly in front of the unit, you will need to put a strainer-strainer.

Separately, it is worth mentioning the issue of an open-type heating system. It is capable of operating in two modes - with forced and gravity circulation of the coolant.

The second option is more suitable for areas with frequent blackouts. This is much more economical than buying an uninterruptible power supply or a generator. In this case, the unit with shut-off valves must be installed on the bypass, and a tap must be inserted into the straight line.

In stores you can find ready-made units with a bypass. In place of the flow tap, they have a check spring valve. This solution is not recommended - the valve produces a resistance force of 0.1 bar, which is listed as a large indicator for circulation system self-flowing type.

It is better to use a reed valve instead. However, its installation is carried out strictly horizontally.

Solid fuel pump and boiler

The pump is connected to a system with a solid fuel unit on the return line. In this case, a pumping device is connected to the boiler circuit with a bypass and a three-way mixing valve. In addition, the latter can be equipped with a servo drive and a clamp-on temperature sensor.

Due to the fact that the maximum performance of heating equipment is used to the full only in the cold period, it is possible to install a heat accumulator (TA). It is able to absorb excess heat, and then, on demand, give it to the heating circuit.

This battery is made in the form of a tank and lined with heat-insulating material. On one side of the device there are two branch pipes intended for its connection, and two on the other - for connection to the radiator line.

In the process of passing the liquid through the boiler, which operates at maximum, the coolant in the heat accumulator warms up to 90-110 degrees over time. In a large circuit, a tie-in of another circulation device is required.

Depending on the degree of cooling of the liquid in the heating system, the required amount of heat from the storage device will enter here through the valve.

Pump installation diagram

To perform its functions, household circulation equipment, regardless of the manufacturer, must be correctly installed on a pipe or shut-off and control valves.

Fastening is carried out by means of union nuts. This fixation option will allow, if necessary, to remove it, for example, for inspection or repair.

Correctly executed installation of all elements of the heating system ensures uniform heating of the entire line. During the installation of the circulation pump, the following rules must be observed:

It is allowed to install the device on any section of the pipe. The pipeline can be positioned horizontally, vertically or inclined. However, the rotary axis must be in a horizontal position. Therefore, installation "head down" or, conversely, up is not possible.
It is worth paying attention to the location of the plastic box where the power contacts are located - they will be on top of the case. Otherwise, they may be flooded with water in an emergency. To do this, unscrew the fixing screws on the casing and turn it in the required direction.
Observe the direction of flow. It is indicated by an arrow on the body of the device.

With all its weight, the pump presses on the body of ball valves located nearby. This should be taken into account when choosing fittings. High-quality parts are equipped with a powerful body, which during operation will not be covered with cracks from daily loads.

Installation of additional equipment

Regardless of the type of heating circuit used, where one boiler serves as a heat producer, it will be enough to install a single pumping device.

If the system is structurally more complex, it is possible to use additional devices that provide forced circulation of the liquid.

The need for this appears in the following cases:

when heating a house, more than one boiler unit is involved;
if there is a buffer capacity in the strapping scheme;
the heating system diverges into several branches, for example, maintenance indirect boiler, several floors, etc.;
when using a hydraulic separator;
when the length of the pipeline is more than 80 meters;
when organizing the movement of water in the floor heating circuits.

To perform the correct piping of several boilers operating on different fuels, it is necessary to install backup pumps.

For a circuit with a heat accumulator, it is also necessary to install an additional circulation pump. In this case, the line consists of two circuits - heating and boiler.

A more complex heating scheme is implemented in large houses on 2-3 floors. Due to the branching of the system into several lines, pumps for pumping coolant are used from 2 or more. They are responsible for supplying the coolant to each of the floors to various heating devices.

If it is planned to organize heated floors in the house, then it is advisable to install two circulation pumps. In the complex, the pumping and mixing unit is responsible for preparing the coolant, i.e. keeping the temperature at 30-40 ° C.

In some cases, the installation of pumping units is not required at all. Many models of wall-mounted electric and gas generators already have built-in circulation devices.

Rules for connecting to the power supply

The circulation pump is powered by electricity. The connection is standard. It is recommended to run a separate power supply line with a surge protector.

To connect, you need to prepare 3 wires - phase, zero and ground. You can choose any of the connection methods:

through the device of the differential machine;
connection to the network along with an uninterruptible power supply;
pump power supply from the boiler automation system;
with thermostat control.

Many are wondering why complicate, because the connection of the pump can be done by connecting the plug to the wire. This is how the pumping device is plugged into a regular outlet.

The first option is not difficult self assembly. It is necessary to install a differential machine for 8 A. The wire cross section is selected based on the rating of the device.

In the standard scheme, power is supplied to the upper sockets - they are marked with odd numbers, the load - to the lower ones (even numbers). Both phase and zero will be connected to the machine, so the connectors for the latter are denoted by the letter N.

To automate the process of stopping the circulation of the heat carrier when it cools to a certain temperature, an electrical circuit for connecting a pump and a thermostat is used. The second is mounted in the supply line.

At the moment when the water temperature drops to the specified value, the device disconnects the power supply circuit.

There are no difficulties in supplying electricity through an uninterruptible power supply, for this it has special connectors. A heat generator is also connected to them when there is a need to provide electricity.

If you choose the method of connecting the pump to the boiler control panel or automation, you will need good knowledge in the power supply system or the help of a professional.

If you know all the connection rules, there will be no difficulties with the installation of the circulation pump, as well as when connecting it to the power supply at home. The most difficult task is to insert a pumping device into a steel pipeline. However, using a set of lerok for creating threads on pipes, you can independently arrange the arrangement of the pumping unit.

Heating pump connection diagrams: options and step-by-step instructions

The choice of the heating pump connection scheme depends on the complexity of the main line itself. Given possible options installation of a circulation pump, thematic videos and photographs.

In order for the heating system to function stably without failures, you will need to study the varieties of circulation pumps and choose the most suitable one, with which you can heat both large and small areas of the house. Experts in their field can answer the question of how to properly install the pump and put it into operation, but this can also be done with your own hands if you have studied the installation diagram of the circulation pump.

Advantages and disadvantages

Installing a circulation pump will protect the heating system from power outages, it is possible even in the presence of narrowed sections and bends in the pipeline contours.

Advantages of a circulation pump for heating:

Profitability and durability of the installed equipment;
Small dimensions of the equipment;
The possibility of using an adjustable pump in the reconstruction of an established system;
If the installation of the pump and the installation rules are observed, then the equipment itself reacts to changes in pressure and water flow in the system;
Actual use in the absence of circulation in a private house;
In minutes, water pumps disperse heat throughout the home;
The efficiency index is high, which guarantees the efficiency of the heating system;
There is no need for additional financial costs;
You can save on electricity consumption by purchasing a diesel generator.

Flaws:

The high cost of some models of well-known manufacturers;
When buying an electric pump, electricity costs may increase;
The total cost of the installation is increased by the purchase of taps, a filter, possible additional pipelines;
Installation by specially hired workers will cost a tidy sum.

When the owners of the house are faced with the problem of uneven heat consumption through the pipeline, then they understand why a circulation pump is needed. To fully heat all the rooms of the house, you can replace the pumps in the heating system of a private house with installations with a large pipeline diameter. The method is uniquely effective, but the installation of the circulation pump itself will require additional costs and efforts, since it will be carried out complete replacement installed old pipes.

It is possible to ensure full-fledged heating of the house during the heating season by installing a circulation pump in an existing heating system, this will be economically more profitable and much faster. Such equipment is installed to prevent the frequent formation of air locks in the middle of the pipeline, after which the normal circulation of the coolant is disturbed.

What are the installation problems?

To figure out how to install a pump and not ruin the entire heating system of a private house, you should avoid typical mistakes:

Incorrectly selected circulation pump for heating. If, when calculating the number of pipes for heating, only the height of the room and the rise of the heated pipeline are taken into account, this is a delusion. First of all, you need to see what diameter the pipes will be, and how many square meters the room occupies;
An erroneous action may be the purchase of pipes with more power than necessary, which will affect the noise of the coolant and the cost of electricity. Similarly to this error, a greater or less than necessary speed of the unit can be selected;
Mistakes are often made during installation work with the pump with one's own hand due to ignorance of the detailed installation diagram. The noise of the coolant and the formation of air cushions can occur due to the wrong direction of water movement;
It is impossible to place the shaft of the circulation pump vertically - this will lead to a reduction in the service life of the components;

If the terminal box is located at the bottom, condensate enters it when the system is started;
Improper use of sealed materials. For example, to seal pipe joints, you should purchase materials that are not afraid of sudden changes. temperature regime. Due to the fact that some may use cheaper silicone as a sealant, in most cases, coolant leakage is guaranteed;
If the power is incorrectly selected with the boiler, this is fraught with insufficient heating of the rooms of the house;
Replacing high-quality pipe fittings with cheap analogues, which may subsequently result in a leak. So, the composition of the original fitting includes nickel-plated brass, which is not affected by fluctuations in the operation of the electrical network.

Equipment diagrams

The two most common schemes for installing a pump on a heating boiler are single-pipe and two-pipe. In the first variant, with a single pipe scheme, the coolant is consumed regularly and constantly, and the temperature change is minimal. The option is more relevant for systems with a natural circulation system.

The two-pipe scheme requires constant inspection and, if necessary, unscheduled maintenance. When working according to this scheme, the temperature drops are very sharp, and the water flow is variable.

Before starting installation work, it is required to read the instructions for the pump in the heating of a private house and in the future to have the possibility of constant access to the equipment.

Step by step installation

Before you install the circulation pump in the heating system, you should study the connection method and allocate a suitable place for the equipment, which will have a permanent approach to it. It is convenient that the entire system will not be completely affected, it will be disassembled small plot. It is at the stage of capital work before the start of installation that all the heating fluid is drained from the pipeline.

To filter solid particles contaminating the pipes from the coolant, a deep filter must be installed. Also, additional expenses include the purchase of a check valve, which is responsible for the direction of water circulation, accessories for all plumbing, sealants, seals and fittings.

The initial stage - choosing a place

When the circulation device has already been purchased, the question arises of where to install and put it. At the moment, the opinions of experts are reduced to two options: in the hot water supply circuit, directly in front of the tank, or on the return line.

Modern materials are produced taking into account the subsequent exposure to high-temperature water, so the pumps are mounted on the supply section of the pipeline or, as everyone is used to, on the opposite side. It is the pump installed on the tie-in of the supply pipe that will provide high pressure in the desired section of the system.

If the pump is installed at the entry point of the expansion tank, this will increase the pressure in the suction area. In most cases, when using a membrane tank scheme, the installation process is carried out on the return section of the pipeline in order to extend the life of equipment, bearings and seals.

To avoid the formation of air pockets in the upper part of the boiler, the device is placed in front of it, thus eliminating the formation of a vacuum. It is possible and beneficial to install a circulation pump on the return line in that it can operate at a lower temperature, which will increase the life of the device.

Lead-in by Stroke (Bypass)

Connecting the circulation pump includes such an intermediate step as inserting a bypass or parallel pipeline into the apparatus. In the event of a power outage or malfunctions of the pumps, the fittings are closed, and the heating system begins to work autonomously, and the coolant passes through the main pipeline through open taps. To correctly understand how to connect the bypass, remember that this is done under the main pipe or as a superstructure, but the size of the main pipeline must be smaller in size.

When installing a horizontal bypass, the main thing is that two shut-off valves are installed along the edges of the pump, which can be closed if necessary and the pump can be dismantled. Additionally, a deep filter is installed to protect the pump from small mechanical particles that can render the device unusable.

Mounting process

Before you start connecting the circulation pump, you should pour out all the water from the system and clean the communications. To increase the performance of the unit, the terminal box is installed from above, and the motor shaft is connected in a horizontal position. The heating system provides for the presence of an expansion tank, as well as mounting ball valves and an automatic (manual) valve above the bypass pipe. Depending on the material of manufacture, metal pipes welded, and plastic ones are connected with fittings.

Installation of pumping equipment step by step:

At the point of inlet and outlet of the pump, shut-off valves are installed on the main pipeline. Thus, an arbitrary duct through the system will be excluded;
All connections in the corners are checked for tightness;
Gradually, the system is filled with coolant. In this case, before starting the unit, the system is vented until water flows, by opening the central screw.

Important! Air must be bled from the system before each start-up, regardless of the season and the frequency of use of the equipment.

Problems that arise are fixed as soon as they are discovered. To figure out how to properly install the circulation pump, it should be understood that one unit is designed for a pipeline distance of 80 m. Correct installation The unit provides for the use of a “wet type” electric pump, which will help to avoid damage to the body when it is not completely lowered into the water. Gaskets must be provided for contributing parts, and the supply to electricity through sockets must be equipped with grounding for safety.

How to keep your pump running smoothly

One of the main principles of the heating system is not only to install the pump, but also to ensure its uninterrupted power supply. To secure the system, it is required to include an uninterruptible power supply in it, which must be equipped with a battery capacity reserve of up to 12 hours of power outage.

The stabilizer will issue " alternating current". Although heating systems can be equipped with diesel autonomous generators, uninterruptible power supplies are used during power surges and to ensure the integrity of the equipment. Before you install a circulation pump, you need to keep in mind that in combination with a UPS, the equipment will be expensive, but the amount will quickly pay off.

If the devices are connected to the network and pass current in transit without changing the parameters, then when the power is turned off, they will switch to offline mode, which will secure the system. Devices that constantly provide current from the battery are able to operate at different parameter values, so they are the most convenient for heating equipment.

In contact with

Modern house heating systems that use forced circulation, due to the impossibility of observing all slopes or a significant length of the main line, need to install a circulation pump. The main task of this device is to ensure constant circulation of the coolant.

Features of choosing a pump for heating systems

The main criteria that should be relied upon when choosing pumping equipment of the circulation type:

density and kinematic viscosity of the coolant used in the system. If the viscosity of the pumped liquid exceeds the parameters recommended by the manufacturer, the hydraulic characteristics of the device will decrease;
equipment power. It makes no sense to buy an overly powerful device. Firstly, it will not work at full capacity, and secondly, it will create noise interference. If you decide to connect a circulation pump to a system with a complex architecture with your own hands, the calculation of the power of the equipment should be entrusted to an experienced technician. To independently determine the optimal model of the device, you can use the following tips.

The ability of the device to meet the needs of the system circuit depends on the following characteristics:

volume and pressure of the coolant,
pipeline diameter,
temperature and density of the pumped liquid.

The flow rate of the heat carrier (Q) passing through a given section of the closed circuit is equated to the flow rate and power parameters of the heating boiler (P=Q). So, if the power of the boiler is 20 kW, then 20 liters of water can pass through it per minute.

Batteries with a power of 10 kW are capable of consuming up to 10 liters of water per minute. Using these data, it is possible to calculate the water flow in the system rings.

The level of water flow in pipes directly depends on their diameter. The narrower the pipes, the higher the resistance in the path of the coolant. The table below is compiled taking into account the standard speed of movement through the pipes of water (1.5m / s).

The power of pumping equipment is directly proportional to the length of the pipeline. It turns out that for every 10 m of the section of the heating system, 0.6 m of pump head is required.

For a more accurate selection of the device, you should also take into account the type of material from which the pipes are made, the type of automation and valves, the number of heaters in the house.

Approximately for a house with an area of up to 250 m2, a circulation pump for heating with a capacity of 3.5 m3 / h, a head of up to 0.4 atm. atm., for buildings up to 800 m2 - with a capacity of 11 m3 / h and a pressure of up to 0.8 atm.

The initial stage of installation of the circulation pump

So, the device model is selected, now you should study the instructions from the manufacturer. Be sure to consider the fact that the heating system will need maintenance from time to time. Carefully read the wiring diagram for the heating circulation pump.

When choosing a place to place equipment, you must remember that periodically you will have to check and adjust the network. Do not forget about the shut-off valves that you need to install at the inlet or outlet of the pump.

Pumps with a "wet" rotor should be placed on the "return". However, today it is possible to purchase equipment with components and parts made of materials that perfectly tolerate the effects of elevated temperatures. Such units can be installed on the return and supply pipes.

If you wish to increase the pressure in the suction area, install the equipment on the supply line close to the expansion tank.

If the house has a "warm floor" system, the pump is best installed on the hot water supply line. This will avoid the formation of air pockets.

The sequence of connecting the pump to the heating system

We remove the liquid from the system and, if necessary, clean the pipeline. In order to understand how to properly connect the circulation pump, you must thoroughly study the diagram.

Prepare wrenches (sizes 22-36), a piece of pipe for bypass, shutoff valves.
In search of an answer to the question of how to properly install the circulation pump, experts came to the conclusion that it is best to place it in front of the boiler on the return line. This decision is explained by the fact that air locks can form at the top of the boiler over time, and if you put pumping equipment in the supply, it will draw air out of the boiler. This can create a vacuum and cause the boiler to boil. If the pump is placed in front of the boiler, then the liquid will be thrown into it, while the heating device will remain filled. In this case, the equipment will be able to function normally at low temperatures, which will positively affect its service life.
After we have decided how to install the circulation pump correctly and where, we perform a bypass (bypass). It is needed so that in the event of a power outage or a breakdown of the device, the system does not stop working, and the coolant goes through the main pipeline with open taps. The diameter of the main piping must be greater than the diameter of the bypass. After the installation of the bypass is completed, we proceed to install the circulation pump, which we also do with our own hands.
It is important to remember that the device must be located horizontally, otherwise only some part of it will be in the water. This is fraught with a decrease in equipment productivity by 30% or more, and in some cases it can lead to a complete malfunction of the working area. Make sure that the terminal box is at the top.
On the sides of the pump are placed Ball Valves, which are needed for maintenance and dismantling of equipment.
To protect the heating system from the ingress of small mechanical particles that can harm the pumping device, a filter is installed.

The valve must be located on top of the bypass pipe. It is needed to periodically eliminate air congestion.
The degree of risk of coolant leakage in the inlet-outlet zone of the pump depends on how well the shut-off valves are fixed.
When fixing the motor shaft, the necessary rotation of the box along the axis should be ensured. If the house uses an open heating system, an expansion tank will be required.
All connections should be carefully treated with sealant.

To install the pump, a device with split threads is used.
If the length of the system pipeline exceeds 80 meters, it will be necessary to install another circulation pump.
The cost of carrying out the above measures depends not only on the model of the device being installed, but also on the number of pipeline circuits, the complexity of installing bypass pipes.

After the installation cycle is completed, the system should be filled with water, remove excess air with a screw, and only then turn on the pump. This sequence of operations must be followed each time the device is turned on. If it is difficult for you to perform these operations manually, choose the installation of a pump equipped with automatic systems for monitoring the operation and protecting the unit.