Circulation pump for a heating boiler: choice and independent installation of the device

The effectiveness and efficiency of your home heating system can be greatly increased by selecting and installing a circulation pump for your heating boiler. The performance of your heating system can be significantly improved by knowing the function of a circulation pump and how to choose and install one, whether you’re looking to upgrade your current setup or are thinking about installing one.

A circulation pump is an essential part of many heating systems, particularly those that heat the air with boilers. Its main job is to distribute heat evenly throughout your house by moving hot water from the boiler around the heating system. Circulation pumps optimize energy use and maintain a constant flow of heated water, which keeps your living areas comfortable.

There are various considerations to make when selecting the appropriate circulation pump for your heating boiler. The pump’s capacity, which is commonly expressed in terms of head pressure and flow rate, needs to be compatible with the particular needs of your heating system. Head pressure shows the pump’s capacity to overcome system resistance, while flow rate defines how much water it can move in a minute.

The circulation pump’s power consumption is an additional crucial factor to take into account. Choosing an energy-efficient model can lower the overall energy consumption of your home and result in cost savings over time. It’s also important to consider durability and noise levels, particularly if the pump will be installed in a residential setting where quiet operation is preferred.

To guarantee safety and optimum performance, if you’re considering installing a circulation pump yourself, make sure you follow the right installation instructions. Start by determining where in your heating system the pump should be placed. This is usually close to the boiler to allow for effective water circulation. Make sure the pump fits into your current setup and is the appropriate size.

Usually, installation entails integrating the pump into your heating system’s existing plumbing. This procedure might need some basic plumbing knowledge and equipment. Before starting any installation work, make sure the boiler is off and the system is drained. The pump needs to be properly primed and tested after installation to make sure it is operating as intended.

You can improve the functionality and energy efficiency of your home’s heating system by comprehending the significance of a circulation pump and learning how to select and install one efficiently. The comfort and economy of your living area can be greatly enhanced by a well-selected circulation pump, regardless of whether you’re planning a new installation or an upgrade to your existing setup.

Choosing the Right Pump Understand your heating system"s requirements and choose a pump with appropriate flow rate and head.
Installation Steps Ensure correct pump placement, connect inlet/outlet pipes, wire the pump to a power source, and bleed air from the system.

What is a circulation pump

The circulation pump is one of the essential components of the hot water and heating system. This apparatus carries out the suction and superior functions, helping the liquid in the heating system to move actively. The pipeline is where the pump is fixed directly. intended to operate within a closed circuit.

The device’s primary components are:

  • frame;
  • impeller;
  • rotor;
  • engine shaft;
  • terminal box;
  • engine;
  • air propeller.

The rotor rotates and moves past the impeller as soon as electric energy is applied to it. As a result, liquid absorbs on one side of the device and pushes against the other. Manufacturers create a variety of models with different case shapes and dimensions to make the units simpler to install and maintain.

Costs of heating boiler circulation pumps

Circulation pumps for heating boilers

What is used for

The heating of the space is done swiftly and evenly because of the circulation pump, which makes these units very versatile.

The following uses for the pumps are installed:

  1. Improving the quality of the system with natural circulation.
  2. Forced movement of the coolant during geothermal heating. The thermal pump works according to the classic carno cycle: the cold coolant takes deeply below and receives in return to 50 degrees a fluid flow inside the heating system. In summer, geothermal equipment from the heater turns into a means of passive air conditioning.
  3. Ensuring water circulation in hot and cold water supply systems in a private house.
  4. Increasing the efficiency of the design of the warm water floor.
  5. Use in air conditioning systems for cooling.

Types of pumps

While the general working principle of all electric pumps is the same, their designs and levels of efficiency vary. You must understand the different types of equipment available in order to select the appropriate one.

Two varieties of circulation units exist:

  1. With a wet rotor. Such devices have a modular design, which simplifies their maintenance and repair. The rotor and impeller are in the working environment, only the electric part remains dry. Devices have a low noise level. Step speed regulator allows you to control the consumption of electric energy. The advantage of the unit is in the long period of operation, subject to the correct installation. The disadvantage of the device is sensitivity to the quality of the working fluid.
  2. With a dry rotor. The pump is characterized by a type of structure. The rotor is imprisoned in the sealed case, and the impeller is immersed in the coolant. From fluid penetration, the engine is protected by sealing rings. The main plus of the unit is a high useful coefficient and minimal requirements for the quality of the coolant. The device creates a high noise level.

We can infer from the features that wet rotor devices are better suited for residential settings like homes and apartments.

Advantages of boilers with a pump

Because of its special design, an electric boiler with a circulation pump can carry out the duties of an entire complex of heating appliances.

The following are the reasons why such equipment is in higher demand:

  1. A large range of models makes it possible to choose a boiler for heating rooms of any area. The user does not need to select the pump separately.
  2. The device allows you to drive off the liquid in all contours with optimal speed. This helps to warmly and quickly warm up the room.
  3. The utility coefficient is 90% and higher, which indicates the high efficiency of models.
  4. The automation of the process provides simple tuning and high safety of boilers.
  5. The equipment is environmentally friendly, since in the process of its operation, no harmful substances are released.
  6. Simple installation of heating system.

Manufacturers create flooring that can heat a large space as well as wall boilers that are ideal for small apartments.


Understanding the drawbacks of boilers with integrated circulation pumps will help decide whether or not to install this type of equipment.

  1. Electricity is more expensive than gas or solid fuel.
  2. The uninterrupted operation of the boiler directly depends on the voltage in the supply network.
  3. The need to install high -quality wiring in a heated room.

The primary drawback of utilizing boilers is the requirement for electric energy supply. To choose the machine and cable for the desired section, it is necessary to calculate the current strength prior to installation. A battery holds a battery that lowers the boiler’s power on the heating system’s output circuit.

Types of boilers

The coolant circulation in the pipes is improved by the pump cut into the heating contour. Their design and technical specifications vary based on the application.

There are two categories of devices: nutrients for steam units and circulation pumps for gas boilers. The most important thing is to select the appropriate device for a particular pipeline and the boiler’s specifications.


Circulation pumps are a common feature of both single- and double-circuit gas boiler models. These pumps are mounted adjacent to the hydraulic unit. Single-phase pumps with a power of up to 100 W and a fluid-pumping speed of up to 2 m/s are the best choice for domestic applications. Because they are made of stainless steel parts, these models are simple to assemble on plastic pipes and have a long lifespan without needing to be repaired.

Similar to electric boilers, single-circuit gas boilers have "wet" and "dry" pumps. When the system has low gas pressure, they are required. Up to 80% of a boiler’s power development is aided by the unit.


Nutritional pumps are industrial devices intended to provide coolant to the steam boilers in power plants or oil refineries. Depending on the model, units can pump water that is between 80 and 165 degrees Celsius. The liquid’s impurity content shouldn’t be higher than 0.2%.

Nutrishing units come in a variety of forms and design implementations. Many of them have an automatic disconnection mechanism because they operate in challenging environments. A check valve is a safety feature on every unit that keeps the water from overheating or rotating in reverse.

The devices’ working parts are composed of non-ferrous metals, cast iron alloys, or steel.

How to choose a pump

You must understand how a circulation unit works in order to select the best one. The manufacturer includes technical documentation with the pump so you can familiarize yourself with them. It is important to consider the protective features and the material used to construct the circular device’s corps.

  1. Performance. This value of the maximum volume of the coolant, which can pump the device in one hour of time. Unit of measurement – m³/h.
  2. Pressure. The indicator is measured in meters and is the maximum value of the hydraulic resistance.
  3. Speed. Allows you to configure heat transfer depending on the temperature on the street. It is better to choose devices that can work at various speeds.
  4. Power. The smaller the diameter of the pipes of the heating system, the more powerful the engine should be.
  5. Temperature. Until how many degrees the liquid will heat up in the heating system.

Where to install

Experts disagree on many points regarding the installation of the unit in the system. Some volunteer to install the pump on the supply pipeline, while others suggest the opposite.

The liquid never gets hotter than 90 °C in the home system, and the temperature hardly ever goes above 70 °C. Consequently, it is preferable to focus on the second version even though the unit can be cut in both the supply and the reverse pipelines with negligible differences in the liquid’s statistical pressure. It makes sense to install a different device on each of the heating system’s two distinct branches.

Up until the circuit’s first branching, I have to install the pump right after the boiler. At that point, every room in the house can have the appropriate thermal regime set.

Forced circulation

Air traffic jams can occur in homes with large system areas, which can cause damage, overheating of the boiler’s coolant, and violations of circulation. As a result, a pump that performs forced circulation is fitted into the return pipe prior to the boiler’s heat exchanger. This enables you to keep the fluid pressure and speed at the appropriate levels.

The mesh filter-gryazer is installed prior to the device because the coolant frequently contains mechanical impurities that can harm the engine or cause the impeller to jam. The device’s two ball valve installations enable maintenance or replacement without emptying the system’s liquid reservoir.

Natural circulation

The rules of physics are where the process got its name. The heated liquid rises to the top of the system and then falls back to the boiler as it cools down, thanks to the supply and reverse pipes’ strictly maintained inclination. Heat transfer will be minimal in this mode of operation. Moreover, the electric energy can be turned off, cutting the pump out of the system. This results in heating that is highly dependable and efficient.

The pump’s bypass line is also mounted; this is a jumper that, when the boiler is disconnected, increases the system’s efficiency. The jumper has a ball of a ball-cutting tap in it. When the device malfunctions or the electricity is cut off, it opens. When the crane that leads to the pump is blocked, the system starts to function based on gravity.

Where you cannot install circulation units

Installing circulation pumps on the supply main is not advised. Sometimes air builds up in the boiler’s upper section and the device is unable to draw it out. This causes a vacuum to form, which causes the coolant to boil.

The steam-water mixture that results starts to enter the system. Because it can only pump water, the pump stops. An explosion could occur if action is not taken quickly.

Rules and nuances of installation

It is best to let the master handle the pump. The manufacturer provides installation guidelines in the technical documentation, so you can attempt to complete the task on your own. Following the guidelines for using the device is crucial.

Selecting the proper rotor rotation with respect to the horizon is crucial to preventing air traffic jams, which can result in equipment failure. An arrow on the device’s casing indicates the direction in which the liquid should flow within the system. The location of the site needs to be such that it is convenient for the unit to operate.

Installation scheme

The boiler and pump can be connected via a number of circuits. The kind of system and heating equipment type are taken into consideration when choosing the preferred option. The device is positioned in each scheme to make serving it comfortable.

  1. The unit is installed on the return immediately before the heat generator.
  2. The pump is mounted at the beginning of the circuit after the security group.
  3. A device with a cutting reinforcement is placed on the bypas.
  4. Used when connecting the pump to a solid fuel boiler. It is better to fix the device on the highway, which goes from the heating system to the heat generator.

A circulation device is installed on the return.

How to connect to power supply

The 220 V network device functions. Phase, zero, and grounding are the three wires needed for connection.

There are two ways to connect it to the power supply:

  1. Directly with a cable or through the terminal block. It is necessary to draw a separate electric line with a gun machine, and using this cable connect the device. Terminals are usually located under a plastic lid. It needs to be removed by unscrewing several bolts, find three connectors. They are signed: Pictograms N – zero wire, l – phase, and the "Earth" has an international designation.
  2. Through a three -pin socket and fork. A new wiring should be done. Carry out the installation of an outer or internal outlet. The unit for connecting to the network will need a power cable with a fork equipped with ground.

When to put additional equipment

The efficiency of the pump determines how well the entire heating system works. In order to avoid an unexpected shutdown of the device, backup power should be added. You can install a stabilizer with linked batteries to accomplish this. The most important thing is to select the appropriate device, determine its capacity, and ensure that it does not discharge.

By adding a thermostat that gauges the liquid’s temperature, you can lower your electricity costs and extend the device’s lifespan. When the indicator hits the necessary level, the pump will start.

Step -by -step instructions for assembly and installation of the pump

It is required to assemble and install the device after purchasing it and deciding on the installation location. Previously, it was required to install a mud for detachment, dirt, and abrasive particles in front of the unit and mount the ball valves on both sides of the pump. An air valve needs to be installed on the upper portion of the bypass.

The following steps are taken in order to assemble and connect the pump to the heating boiler:

  1. Before installation, the liquid from the system should be drained. For full cleaning, you need to pour the coolant into it and lower it, then repeat this procedure a couple of times.
  2. Install the pump in the system.
  3. After installation, all places of joints must be carefully seized.
  4. Pour the system with liquid. Remove excess air.
  5. Connect the device to the electric network.

The length of the pipeline determines how many circulation devices the system needs.

The cost of pumps of different types

On the market, there are a lot of businesses that specialize in producing circulation units. It is advised that consumers purchase models made by European manufacturers with authority. Certain Russian businesses’ products are also in demand.

Model Manufacturer country Price, rub.
Prima UPS 25/60 180 Russia 1570
Wester WCP 25-40G Russia 2127
LRP 32-50/180 China 2598
Hoffmann UPC 25-40 180 Germany 5256
Yonos Pico 15/1-4 Germany 6051
A 56/180 XM Italy 10953

Both pricey and low-cost models are available for sale. The choice of pump for a heating boiler is a personal one for the home owner. Some people base their decisions on the manufacturer’s level of notoriety, while others consider price and accessibility of the service. Study by link on how to select a heating radiator.

The effectiveness and efficiency of your home heating system can be significantly increased by selecting and installing a circulation pump for your heating boiler. Homeowners can take charge of their heating systems and possibly save money on energy by being aware of the important factors to consider and the procedures involved in this process.

It is crucial to first take your boiler system’s size and heating capacity into account when choosing a circulation pump. For best results, the pump’s head pressure and flow rate should be in line with what your heating system needs. Furthermore, search for energy-efficient pumps, as these can help lower operating expenses and overall energy consumption.

For many homeowners with basic plumbing knowledge, installing a circulation pump is a do-it-yourself project. It is imperative to adhere to the safety guidelines and instructions provided by the manufacturer. First, decide where in the piping system of your boiler the pump should be placed. To ensure that the pump can efficiently push the heated water through the system, it is usually best to install it on the boiler’s return line.

To prevent any mishaps or harm, it is imperative to turn off the boiler’s electricity and empty the system prior to installation. To reduce heat loss and stop leaks, make sure the connections are adequately fastened and insulated after the pump is installed. It is advised to thoroughly test the pump’s functionality after installation to ensure proper operation.

By choosing and installing a circulation pump for your heating boiler on your own, you’re not only increasing the heating system’s efficiency in your house but also learning a lot about how it works. Over time, this practical approach may result in more comfort and possibly lower heating costs. Always remember to seek advice from a qualified heating technician if you have any questions concerning any part of the installation procedure.

In this article about choosing and installing a circulation pump for a heating boiler, our main focus is to simplify the process for homeowners. The circulation pump plays a crucial role in heating systems by ensuring efficient distribution of hot water throughout the house. When selecting a pump, factors like pump size, flow rate, and energy efficiency are important to consider. It"s also vital to understand the installation process, which can be done independently with the right tools and knowledge. We"ll guide you through step-by-step instructions on how to safely and effectively install a circulation pump to improve your boiler"s performance and overall heating efficiency. By the end of this article, you"ll have the confidence to choose and set up a circulation pump that suits your heating system, making your home more comfortable and energy-efficient.

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