Installing a circulation pump in a heating system

To improve the performance of the heating system, a circulation pump is installed. With its help, the coolant circulates evenly throughout the system and distributes heat equally throughout all rooms. We will discuss how to connect a circulation pump to the heating system below.

Functional features of circulating sediments for heating systems

Owners of an autonomous heating system quite often face the problem of uneven heat distribution in different rooms. Rooms that are located near the boiler have a high air temperature, and those that are far away have a low temperature.

To solve this problem, you should use the following options:

  • expand the pipes and redesign the entire system;
  • use a circulation pump that will help distribute the coolant in the heating system.

The least amount of physical and material effort must be allocated to perform the second method. Connecting a circulation pump to the heating system allows you to achieve:

  • uniform heat distribution in the system;
  • eliminate air accumulations and efficiently transport coolant;
  • improve the performance of the heating system.

The heating system, which is based on the transportation of coolant, requires work to install circulation equipment. This device allows for forced transportation of the coolant in a heating system that has a closed loop.

In relation to their design features, circulation pumps are usually divided into two groups:

  • wet rotor equipment;
  • dry-motor equipment.

The first option is distinguished by the presence of a rotor and impeller, which rotates in the coolant fluid. Between the elements in the form of a rotor and stator there is a glass, for the manufacture of which stainless steel is most often used. In addition, the rotor is distinguished by the presence of a shaft - metal or ceramic in origin.

The liquid that moves through the system is responsible for lubricating parts and cooling the engine. This pump has a fifty percent efficiency.

More advanced models of such pumps have a modular principle. The blocks are grouped in relation to the size of the pump and the required fluid supply. Thus, in order to repair this equipment, it is enough just to replace certain parts.

In addition, this type of pump is distinguished by the presence of an impeller, which has both radial and axial features. One of the main advantages of such sediments is the independent removal of excess air that is present in the system.

To pump large volumes of liquid in public or industrial settings, the use of circulating pumps is recommended.

The operating principle of such equipment is that the coolant does not come into any contact with the surface of the rotor during its operation. In addition, in the area between the electric motor structure and the main part of the sediment, there is an end-type seal. A thin film of water forms between the pump sections; it is capable of sealing the equipment as the rotor rotates.

An agglomerated type of coal is used to make rings. If they have to work under high operating loads, ceramics or stainless steel are used as a base.

In relation to the design features, two types of sediment are distinguished. The first of them operates in a dry environment and has a flange type connection, while the second is distinguished by the presence of a coupling type connection. If there are two pipes on one fragment of the pump, it is called direct-flow; they are installed directly in the pipe.

Circulation pump for heating systems - characteristics and selection features

The procedure for selecting a circulation pump is an important process that requires a high degree of responsibility from its performer. The sediment used in the heating system must be made of high-quality materials, since it must easily withstand the temperature of the coolant, which reaches more than one hundred degrees.

In addition, you should pay attention to the following characteristics of the device:

  • the value of the working pressure is determined in meters;
  • the amount of working flow.

When choosing a sediment, you should compare its power with the room and heating system in which it will be installed. To do this, first determine the heat required to heat the entire house.

To calculate this indicator, the area of ​​heated premises should be multiplied by 100 W of heat if the calculations are carried out in a residential building and by 70 W if in an apartment. With an improved thermal insulation system, this figure is reduced to 50.

To carry out complete transportation of the coolant fluid in the system, the pressure that will perform these actions must be correctly calculated. For these purposes, it is necessary to determine the system point located away from the starting point of the system, that is, the area of ​​​​the most distant radiator.

To calculate the circulation pump for a heating system, we recommend using the following formula:

K=(A+BxC)/bxs(m), where:

  • K is the total length between points;
  • A - hydraulic resistance;
  • B - working fluid and its density;
  • C is the resistance value of sewer sections;
  • b - density value;
  • s is the acceleration value.

Each of these values ​​is found in the technical parameters of the circulation pump.

In addition, the manufacturer of the circulation pump is an important factor. We invite you to familiarize yourself with the most popular manufacturers of this equipment, whose product reviews are extremely positive.

1. Circulation pump for Grundfos heating systems - among the advantages of using these pumps, we note:

  • optimal balance between low power and high performance;
  • economical consumption of electricity to ensure the operation of the equipment;
  • ability to maintain the required temperature during autonomous operation of the pump;
  • the presence of special thermostats that simplify working with the system;
  • simplicity of design does not require special experience for installation and maintenance of this equipment;
  • a variety of models in terms of design and technological capabilities allows you to select equipment that will suit the individual characteristics of any heating system;
  • the cost of such pumps directly depends on their configuration characteristics;
  • high practicality and reliability, which is confirmed by positive reviews from most buyers.

2. Circulation pump for heating systems Wilo - is of German origin, the pumping equipment of this manufacturer is of high quality and also has positive technical characteristics. Among the advantages of this equipment we note:

  • installing a Wilo circulation pump can significantly increase the efficiency of the heating system and improve heat exchange;
  • thus, heating boilers require less fuel, which means that the cost of ensuring the heating is operational is significantly reduced;
  • Due to the presence of high pressure, plaque and various types of salts do not accumulate on the pipes.

Installation diagram of a circulation pump in a heating system

Installation work to connect the circulation pump to the heating system should be carried out in accordance with these requirements:

1. Elements in the form of ball valves are installed on both sides of the approximate installation location of the pumping equipment itself, which will help stop the flow of water if it is necessary to repair or replace the pump.

2. The filter valve will help to perform mechanical water purification. Thus, the pump and system will work longer.

3. A manual valve will help solve the problem of vapor accumulation.

4. You should also pay attention to the markings of the installed equipment.

5. The submersible pump should only be installed horizontally.

6. Make sure the terminals are facing the correct direction.

7. To avoid the occurrence of various types of leaks, you should use a high-quality sealant.

8. Connect the equipment only to a grounded electrical network, this will protect people using the pump and the equipment itself from current surges in the network.

How to install a circulation pump in a heating system

Taking the process of connecting the circulation pump seriously will help you avoid most of the problems that arise during its operation, the most common of which are:

  • rapid equipment breakdown;
  • non-compliance with pump installation technology;
  • incorrect terminal placement;
  • lack of grounding;
  • mandatory deflation;
  • failure to perform work to clean the system;

Installing a circulation pump in an open heating system is extremely rare, since the efficiency of its operation is not always justified.

To carry out work on installing a circulation pump in the heating system, you will need the following:

  • American women;
  • bybass line;
  • check valve;
  • filter valve;
  • various types of plumbing tools.

After purchasing a pump, the installation procedure follows. Before performing it, you should definitely read the instructions, which indicate the main individual points for installing this equipment.

The circulation pump is installed in the heating system on the return flow of the coolant near the heating boiler. Thus, it is possible to reduce the temperature of the coolant that passes through the equipment, and its service life is significantly increased.

Before installing the pump, the boiler should be disconnected from the system and locking mechanisms should be installed to block the movement of the coolant. Next, the pump is installed with threaded connections.

Please note that the horizontal location of the circulation pump will significantly reduce its noise output. Since its vertical installation contributes to the release of a large amount of noise during operation.

In addition, you should install a filter that will help clean the water from dirty impurities; if you neglect this rule, the pump will quickly fail. When installing a circulation pump in a closed heating system, a check valve must be installed to prevent the outflow of water from the system; in an open heating system, installing a check valve is optional.

Features of connecting the circulation pump to the heating system

To connect the pump to the system, follow these steps:

1. When installing equipment into a previously operating heating system, it is recommended to completely get rid of the coolant by draining it from the system.

2. If the heating system has been in use for a long period of time, it is recommended to clean it by filling it with liquid and flushing the system.

3. Next, the functional chain and shut-off valves are installed. Ball valves are installed on both sides of the pump. With their help, pumping equipment can be dismantled without draining the coolant.

4. In the area located in front of the pump, a filter should be installed to limit the entry of mechanical impurities into the pump.

5. The presence of an air valve will allow, if necessary, to rid the system of air accumulation.

6. To avoid damage to the working part of the pump, it should be installed only in a horizontal position. In this case, the direction of the terminals should be top.

7. To protect threaded connections from moisture, it is recommended to treat them with a sealant.

8. After completing all the work, run the coolant into the system. Next, by opening the central screw, the system gets rid of excess air.