Grundfos pumps for heating: varieties, selection, installation. Grundfos circulation pumps for heating - the choice you've been looking for Wilo wet rotor pumps, STAR series

In our electronic pump catalog- a large assortment pumping equipment well-known European manufacturers - the German company Wilo and the Danish company Grundfos. Buying Wilo pumps or is buying high-tech devices with excellent operational characteristics, allowing to solve the problems of circulation of liquid media, drainage of sewage and sewage, heating and air conditioning.

One of the most popular types of pumping equipment - c circulation pumps, designed to run a liquid medium in closed systems heating and water supply. The main types of circulation pumps include dry rotor pumps, wet rotor pumps, in-line pumps and cantilever pumps maintaining the pressure in the system at a constant level. Circulation pumps with a "wet rotor" immersed in a liquid medium are more often chosen for solving problems of moving liquid in small heating systems. Pump circulation equipment of the "in-line" type has pressure and suction pipes located on the same axis, which allows them to be installed directly into the pipeline system. Powerful "dry rotor" circulation pumps that do not come into contact with the liquid medium are usually used in industrial areas for pumping large volumes of liquid. Each series of circulation pumps is differentiated in terms of power, performance and pressure, so the consumer always has the opportunity to choose the pump that best meets the stated requirements.

Wet Rotor Pumps

Wilo Glandless Pumps, SMART Series

Wilo pumps with a wet rotor and automatic power control are made of gray cast iron and are designed for fluid temperatures from +2 to +95 degrees Celsius. Working pressure - 10 bar, performance - 3.5 cubic meters. meters per hour. Pipe connection threaded way. Simple operation and installation, low noise level and the availability of a rotor release system, as well as additional engine protection against foreign particles using a special bronze filter, allow these circulation pumps to be used in a wide range of applications - from municipal water supply systems to process circulation circuits in industry.

Wilo Glandless Pumps, STRATOS Series

In our catalog of pumps you can choose and buy a pump - a highly efficient device with the ability to switch the speed and control the differential pressure with a capacity of up to 105 cubic meters. meters per hour. Maximum working pressure - 10 bar (special version - 16 bar), and temperature - from +2 to +95 degrees Celsius.

Parting modifications within the series combine single and twin pumps (Stratos D), pumps with automatic system engine power management, high efficiency class (A) and 80% energy savings (Stratos ECO), used both in industrial systems, solar thermal plants (Stratos ECO - ST), pumping secondary hot water(Stratos ECO-Z) and in circulation circuits apartment buildings(Stratos ECO-L).

One of the latest developments of the Stratos series, the Pico single circulation pump, with a new motor, low power consumption, a large digital display showing the current status of the pumping equipment, as well as automatic ventilation engine rotor.

Wilo Glandless Pumps, STAR Series

Glandless pump designed for use in industrial circulation systems. Specifications include automatic power matching, speed staging, and capacities up to seven cubic meters per hour. With the help of the Wilo Star circulation pump, it is possible to pump not only water, but also a water-glycol mixture (the maximum ratio is 1: 1).

Glandless Wilo TOP circulation pump

With a wet rotor, it is used in industrial air conditioning, refrigeration, heating and hot water systems. Performance circulation pump Wilo TOP up to 120 cubic meters per hour. The Wilo Top range includes devices with speed presetting (Top - E, TOP - ED), an infrared monitor and automatic optimization of pump power at peak load, which saves up to fifty percent of energy.

Wilo Glandless Pumps NO Series

A series of circulating glandless pumps that do not require maintenance. The main area of application is heating systems. High quality is confirmed by German and Russian certificates.

Grundfos wet rotor pumps Magna, Magna-D series 2000

Grundfos 2000 series glandless pumps are specially designed to circulate heating medium for systems with variable flow when a change in flow rate leads to large pressure drops and it becomes necessary to automatically control the pressure of pumping equipment. The pumps of this series can be used for non-viscous, clean and non-aggressive media, free of solids and fibrous impurities, as well as mineral oils. The principle of operation of MAGNA pumps is based on the electronic measurement of their characteristics in this moment time, the microprocessor calculates the actual flow or temperature of the fluid, and selects desired mode pump operation (proportional pressure change mode, night mode). The use of Grundfos pumps of this type allows you to significantly reduce operating costs, since a decrease in the head of pumping equipment leads to minimization of energy costs.

Circulation pumps Grundfos UP,UPS,ALPHA,UPE

Circulating Grundfos pumps series are designed for pumping water in one-pipe and two-pipe hot water supply systems. base model The UP 100 series has a one-stage regulation, and the apparatus with the additional letter S (UPS) has a three-stage regulation. The body of circulation pumps of this series can be made of bronze or anti-corrosion of stainless steel. The stator is isolated from the "wet rotor" by a steel sealed sleeve.

The difference between pumping units UPE 2000 series and UP 100 series is that they are equipped with a built-in electronic control unit that allows you to automatically adjust the pressure in pipeline systems with variable flow without the use of other devices.

The Grundfos ALPHA pump is designed for use in domestic or small industrial hot water systems with constant or variable flow or temperature fluctuations, and in systems where night operation is not required. The advantages of this pumping equipment include low noise level, economy mode work, compact design and no maintenance requirements.

Grundfos wet rotor circulating pumps UPS,UPSD series 200

Grundfos 200 series pumps are designed for the circulation of fluid in heating and domestic hot water systems, as well as in cooling and air conditioning systems. Series 200 combines single (UPS) and dual (UPSD) circulation pumps with three speeds of rotation, allowing you to choose the most optimal mode of operation for a particular hydraulic system. Modular design Grundfos pumps include a standard module, a motor protection module and a relay module. The communication bus communication unit is included in the basic set of single pumps.

The relay module can perform both signaling functions for single pumps and monitoring functions for various operating modes of double pumps (shift, redundant and independent).

Adjustable circulation pumps Grundfos ALPHA

High-quality circulation pumps for domestic use are designed to work in the heating systems of hotels, hospitals, apartment buildings, schools, etc. With pumping equipment of this kind, which allows you to automatically modify your settings depending on changes in the parameters of the heating system, you can not worry about the complicated operation of the devices. Some models are equipped with IR communication modules and units for external monitoring and control as well. Low noise level, compactness and long service life increase the demand for these series of devices. Productivity - 3 cubic meters. meters per hour.

Pumps with "in-line"

Grundfos TP, TPE variable speed in-line pumps 1000 and 2000 series

Grundfos single pumps, as well as their dual version ( and ), are vertical pumping equipment that can be used for heating and air conditioning administrative buildings. high requirements to the purity of the pumped liquid is not, since, unlike pumps with a "wet rotor", these devices have a monoblock design and are less sensitive to the presence of impurities in the liquid. Cast iron or bronze can be used as a material for the manufacture of pumps.

The difference between Grundfos TPE and TR pumps is that the TPE series electric motors are equipped with a built-in frequency converter, which can significantly reduce energy costs and increase the efficiency of the device. The difference between the TPE 1000 and TPE 2000 pumps is in the equipment of the 2000 series pumps additional sensor differential pressure.

Pumps with "dry rotor"

Circulation pump WILO IL refers to devices with a dry rotor and has a flanged connection to pipelines. It is used for pumping drinking water, as well as water without abrasive inclusions and water-glycol mixture for heating circuits. High resistance to corrosion due to the use of stainless steel and thermoplastic (Noryl) as the starting material with high resistance to aggressive chemical environments. In our catalog of pumps - two options circulation pump WILO IL - single (IL) and double (DL) type.

The circulation pump WILO IPL and its twin version WILO DPL can be flanged or threaded to the pipeline. Widely used in piping systems with liquid carriers without abrasive particles.

Pumps of the Wilo IP-Z series are used for pumping drinking, cold and hot water in cooling, air conditioning and heating systems. The operating characteristics of the device are designed for pressures up to 10 bar; temperature of the pumped liquid up to 65 °C (for drinking water) and from -8°C to 110 °C (for heating systems). Wide application is due to high corrosion resistance and suitability for pumping hard water (up to 5 mmol/l).

Pumps of the Wilo IPS series are made of gray cast iron, have a mechanical seal and are used for pumping oil or water coolants in industrial circulation systems. Refers to single-stage low-pressure equipment. Working temperature range: from -10° C to +140°C.

Cast steel Wilo IPH pumps are in-line single stage pumps With flange connection to the pipeline and are designed for operation at temperatures from -10° C to +350°C. Oil is used as the heat transfer fluid. It can be installed both indoors and outdoors.

Wilo PH- pump equipment gray cast iron surface type and female threaded flanges. The pumped liquid can have temperatures up to 100 ° C. Developed power of 0.9 kW at an operating pressure of up to 6 bar.

Wilo NP- low-pressure centrifugal pump made of gray cast iron and chrome-plated steel, standing on a base frame and used for pumping non-aggressive liquids without abrasive impurities in heating systems, as well as irrigation systems and public water supply. May have a gland or sliding mechanical seal. Working pressure - up to 16 bar.

Cantilever monoblock pumps

Grundfos NB, NBE and NK centrifugal overhung pumps

The centrifugal cantilever pump is used to maintain the pressure in the system at a constant level. One of the most common working media of cantilever pumps is water, but other fluids similar to physical properties And chemical composition. The main areas of application of this type of pumping equipment are water supply, industrial systems pressurization and fluid transfer, irrigation, and heating, air conditioning and ventilation.

Differences of centrifugal console pumps Grundfos NK, NB, NBE

They are a block structure, where each element - an electric motor, a coupling, a pump part - is made separately, but connected to other elements and mounted with them on the same frame.

Unlike NK pumps, they are single-stage, monoblock designs in which both the electric motor and the pump itself are integrated into a single unit.

Both series are available in both vertical and horizontal versions. Both the Grundfos NB and Grundfos NK centrifugal overhung pumps are highly durable and do not require constant maintenance.

They have a motor with a built-in frequency converter and a software application that allows electronic control and adjustment of the motor speed. The NBE series pumps are compact and can fit into tight spaces.

Accessories for Grundfos pumps

In our electronic catalog of pumps you can purchase not only Grundfos pumping equipment, but also accessories for pumps of different series, for example, for ALPHA, UPE, series 2000 adjustable circulation pumps - timers with a daily scale, LON converters, LINK - cables, etc.

The heating system with natural circulation of the coolant is a classic that has several drawbacks. Firstly, the low speed of the coolant, which reduces its temperature in the return circuit. Secondly, the uneven distribution of hot water over the radiators. All this reduces the efficiency of heating in general.

There is one solution to this problem - to install a circulation pump. But what? Almost all experts agree in one opinion: it is better than the Grundfos UPS pump today.

history of the company

The history of Grundfos dates back to 1945. The Danish engineer Paul Du Jensen set up a small production facility called "Bjerringbro Pressestoberi og Maskinfabrik", which in translation meant: Bjerringbro press-casting and machining factory.

Initially, the engineer was engaged in the development and production of only pumping equipment. The quality and non-standard approach to solving many problems related to the design and dimensions of devices have made the company's products very popular. Production grew, consumers became more and more.

Until 1967, the Dane repeatedly renamed his company. And only this year the name Grundfos appeared, which still exists.

According to world statistics, pumps from this company account for 50% of world consumption. Why? Quality has already been mentioned. But there is another reason - the company has become an international concern. Plants, factories, small assembly shops are scattered all over the world. Russia is no exception. In 1992, a representative office was organized in Moscow, which grew into a subsidiary with the opening of a plant near the city of Istra.

Varieties of devices

The company currently offers two types:

With a dry rotor.
Wet rotor.

Dry Rotor

It should immediately be noted that this type of pumping equipment has a high efficiency. Plus it has a lot of power. For these types it is necessary a large number of coolant, so devices of this type are used either on manufacturing enterprises, or in the heating system of large buildings. They are rarely used in private housing construction (a huge house in the form of a palace with a separate boiler room).

The design feature is a rotor that does not come into contact with water, hence the name. It is separated from the chamber where the coolant moves by a cuff.

The dry-type Grundfos circulation pump is very noisy, it is equipped with a special fan that maintains the required temperature of the unit case.

wet rotor

For heating systems in private houses best option- Grundfos UPS pump. Let's start with the abbreviation: UP stands for circulating pumps, S is a three-speed switching system. That is, this circulation pump can operate in three speeds, which are switched either manually or automatically.

Compared to the previous type, a wet rotor pump has a low efficiency - 50%. But it works silently. The only condition for high-quality operation is the high quality of the coolant. If this condition is met, the device will work up to 10 years guaranteed.

Experts recommend installing a Grundfos circulation pump with automation in the home heating system. First, you can set the mode of operation for several days. Secondly, such a unit consumes less electricity. Thirdly, the complete absence of the maintenance process. I set the settings and no more need to approach the equipment.

Specification overview

To take apart specifications device, you need to consider one of its models, for example, Grundfos UPS 25-40. This is one of the most popular products that is used for heating systems of country houses.

The numbers in the marking indicate that this device has nozzles with a diameter of 25 mm, and a pressure of 40 dm or 4 m. For one-story house(dachas, cottages) - the best option.

If a single-pipe system is used, then such a circulation pump will also pull a two-story house.

Options

Now for the additional specs:

when switching speeds, the output power of the pump will be as follows: 25-35-45 W;
volume of pumped coolant - 3.5 m³/h;
length of the device between the ends of the nozzles - 18 cm;
product weight - 2.6 kg;
mains supply with a voltage of 220-230 volts.

The pump body is made of cast iron, the motor is made of aluminium. The impeller and bearings are ceramic, the rotor is solid steel. All these materials are specially selected in this way. They have increased strength and are well resistant to high temperature coolant. This is especially true for bearings. In harsh operating conditions, ceramic bearings can withstand 10 years, plus it is ceramics that can reduce noise during the rotation of the rotor.

The manufacturer currently offers circulation pumps with technopolymer impeller and ceramic rotor. This innovation increases the efficiency of the device and the service life. This must be taken into account when buying if you want to have a high-quality unit in the heating system.

What to pay attention to?

The manufacturer has already made sure that in the process self-assembly House master did not mix up the direction of installation of the nozzles. An arrow is marked on the pump housing, showing the rotation of the rotor, and, accordingly, the movement of the coolant.

Please note that mounting hardware is not included in the package. So you will have to take care of their purchase in advance. It is recommended to wait a day after installing the circulation device, and then start it. This is due to the fact that the circulation pump itself should only work at positive indoor temperatures. And if the product was stored or transported in the cold, then its quick installation and start-up can lead to breakage.

Network connection alternating current it is better to carry out in the form of a separate cable from the switchboard. For Grundfos models UPS 25-40 is suitable three-core copper cable cross section of one core 0.75 mm².

Overview of other models

Grundfos offers two more models:

magna.
alpha.

magna

The peculiarity of the model lies in the fact that it can be used for heating, and for hot water supply, and for air conditioning systems. The device is provided with a control unit that monitors the temperature and pressure inside the heating system. Pumps low power can be installed on underfloor heating.

Alpha

This is an innovative solution that allows you to move away from solving problems associated not only with manual settings, but also with automatic ones. If I may say so, this is a "smart pump". The pump installed in the heating system at home decides on the basis of which mode it will work. And be sure that he will choose the best option. And this is a uniform distribution of heat in all rooms, plus good fuel and electricity savings.

If for some reason changes occur in the heating, the device itself adapts to them. In this case, you can set the pump to certain mode settings. For example, reduce fuel consumption at night or at times when no one is in the house. Plus, a unit is installed in the power supply system, which is responsible for converting the frequency of the current.

Installation Features

The Grundfos circulation pump is mounted only on a horizontal pipeline. This is how its efficient and correct operation is ensured. Units with a wet rotor must be installed on the supply circuit, and with a dry one - only on the return. The thing is that in the pump with a dry rotor there are rubber and paronite seals, cuffs and gaskets. Under the influence of high temperatures, they quickly fail.

Be sure to install a coarse filter before the unit. This small and inexpensive device will extend the life of the pump itself. Units with any type of rotor can be installed in open or closed heating systems.

If there are problems with the supply of electricity in a suburban village, then the circulation pump is best installed on the bypass. The coolant passes through the Grundfos devices with difficulty, the gap between the impeller and the pump housing is too small.

And the last. Choosing a pump for own house, you must first pay attention to its characteristics. Special attention pressure, on which it depends whether the coolant rises to the required floor or not. If the heating scheme in the house is single-pipe, then this indicator will be less, if it is two-pipe, then you will have to purchase a device with a higher indicator.

Despite the widespread use of natural circulation heating systems, they have a number of serious disadvantages. Among them should be included low speed liquid movement, which negatively affects the final temperature in the return circuit. It should also be mentioned that not all radiators receive the same amount of hot water. Such shortcomings do not allow to provide the house with enough heat.

However, today this problem can be solved if the heating system functions in combination with a circulation pump. Here comes the problem: which one to choose? If you turn to specialists, then, in their opinion, the best option among all the options offered is the Grundfos UPS pump.

history of the company

The starting point for Grundfos is 1945. It was then that on the initiative of the Danish engineer Paul Du Jensen, a small production was founded, which was called "Bjerringbro Pressestoberi og Maskinfabrik". If you try to translate it, then in Russian it will sound like a factory for molding and machining in Bjerringbro.

At the first time of the company's work, the engineer threw all his efforts into the creation and production of only one product - pumping equipment. Due to the high quality that the products had, as well as a non-standard look at solving most problems concerning design features and dimensions, it did not take the company very long for the manufactured units to become highly popular. As production capacity increased, more and more consumers opted for products under this brand.

Until 1967, the company changed its name several times. And only this year the name Grundfos was assigned to it, by which today they recognize the manufacturer of high-quality pumps.

If we turn to world statistics, then the share of pumping equipment manufactured under the Grundfos brand accounts for about 50% of world consumption. The reasons for this situation are not only related to high quality. This was also facilitated by the fact that the company today represents an international concern. In many countries there are factories, factories and small assembly shops, created at the initiative of the Grundfos management. They are also available in our country. So, in the Russian capital in 1992, a representative office of the company appeared, which later received the status subsidiary, whose first decision was to launch a plant near the city of Istra.

Varieties of devices

If we consider the range of the company, then the following types of grundfos pumps can be distinguished in it:

With a dry rotor.
Wet rotor.

Dry Rotor

One of the features of this type of pumping equipment is a high efficiency. In addition to this, it has a lot of power. Similar models of grundfos pumps are designed to work with a lot of liquid. For this reason, they are common in manufacturing plants or are used in the heating systems of large buildings. But for residential buildings of a private type they are used extremely rarely.

If we consider the design of this apparatus, then it excludes the contact of the rotor with the liquid, which determines the name of these pumps. The cuff serves as a separator between this part and the chamber in which the liquid circulates.

When operating dry-type Grundfos circulation pumps, it should be taken into account that they create a large amount of noise. This is due to the presence in their design of a special fan, which during rotation provides cooling for the body of the device.

wet rotor

If we consider heating systems for residential buildings of a private type, then the best choice there will be a Grundfos UPS pump for them. Let's try to decipher the abbreviation of this device: UP indicates that this model represents a class of circulation pumps, S gives a hint that the device uses a three-speed switching system. In other words, during the operation of the grundfos circulation pump, the owner can choose any of the three speeds, which can be switched mechanically or automatically.

Against the background of devices of the previous type, installations equipped with a wet rotor, have high efficiency, the value of which reaches 50%. Its advantages should be called the absence of noise during operation. True, for effective use high quality coolant must be supplied to the system. If this requirement is met, the grundfos pump can be expected to perform its task effectively for at least 10 years.

According to experts, the Grundfos automatic pump will be the best choice for the heating system of a private house. This will enable the owner to choose the desired mode of operation for several days. In addition, when using such a pump, energy costs will be small. An important point is the absence of the need to carry out maintenance activities for such equipment. It is enough just to set the necessary settings for the device, after which you will not need to change anything in the equipment.

You can get an idea about the technical characteristics of the device using the example of one of the manufacturer's models, which can be pump Grundfos UPS 25-40ST.This device is in rather high demand among the owners of country houses.

If we analyze the numbers present in the marking, we can understand that the model is equipped with nozzles with a diameter of 25 mm, having a head of 4 m. This product is able to ensure the efficient operation of the heating systems of a one-story house.

In the event that the heating is presented in the form of a single-pipe system, then such a grundfos circulation pump will be able to successfully perform its functions in a two-story house.

Options

In addition to the main ones, attention should be paid to additional specifications this device:

if the owner decides to change the speed of the grundfos pump, then the power will vary between the following values: 25-35-45 W;
throughput is 3.5 m 3 /h;
the distance of the device between the ends of the nozzles is 18 cm;
weight - 2.6 kg;
works from a network of 220-230 volts.

Design features

For the manufacture of certain parts of the grundfos pump can be used different materials: cast iron is used for the pump housing, aluminum is used for the motor. Ceramic is used as the material for the impeller and bearings, and steel is used for the solid rotor.

When choosing each of these materials, their characteristics were taken into account. Thanks to them, these elements demonstrate high strength and do an excellent job with a coolant heated to a high temperature. The first thing to consider is the bearings. Even if the pump is used in particularly harsh conditions, ceramic bearings can operate without a single repair for up to 10 years. In addition, the use of ceramics provides the advantage of reducing noise during rotation of the rotor.

If we evaluate the manufacturer's assortment, then it presents models of grundfos circulation pumps, equipped with a technopolymer impeller and a ceramic rotor. Through the use of such innovations, it is possible to significantly increase the value of efficiency installation and extend its service life. These features must be remembered by those who are important to install a high-quality device in the heating system.

What to pay attention to when installing?

Tough moment at the installation stage, the choice of the direction of the nozzles is correct. However, there will be no problems with this due to the fact that the manufacturer has taken necessary measures which will make this task easier. If you look at the pump housing, you can see an arrow corresponding to the rotation of the rotor. From it you can understand in which direction the coolant is moving.

Please note that the circulation pump is sold without fasteners. Therefore, you will have to buy them separately. After completing the installation of the circulation device, you should pause for a day, and then you can start the pump. This must be done for the reason that the operation of circulation pumping equipment should take place exclusively at positive temperatures indoors. If prior to the purchase of the pump it was or was transported in the cold, then without its natural heating constituent elements at start-up there is a risk of its breakage.

To connect the device to the AC mains, it is advisable to use a separate cable, taken away from the switchboard. In the case of using the Grundfos UPS 25-40 model, you can opt for a three-core copper cable with a cross section of one core 0.75 mm 2.

Overview of other models

Also on the market are other models under the Grundfos brand:

magna.
alpha.

The model of this pumping equipment is presented in three classes: large, medium and small pumps. If we are talking about the heating system of a private house, then you should choose a device that represents the last two groups.

The model differs in that it is able to equally effectively support the operation of the heating system, hot water supply, and air conditioning. The design includes a control unit, the function of which is to control temperature regime and pressure created in the heating system. The main purpose of low power pumps is to provide effective work warm floors.

When developing this model, the latest achievements of the company were used, thanks to which the need for manual and automatic tuning methods was eliminated. In other words, the company managed to create a "smart pump". After installation, this equipment independently determines the preferred mode of operation. The owner can be sure that the device will choose the most suitable option. When using such a unit, it is possible to ensure not only efficient distribution of heat throughout the premises, but also reduce the cost of fuel and electricity.

During operation, the device monitors changes in heating, adapting its own mode of operation to them. The owner has the ability to independently select values for certain mode parameters. For example, it is possible to provide for the pump to reduce fuel consumption at night, as well as during those hours when there are no people in the house. In addition to this, the power supply system is equipped with a special unit whose function is to convert the frequency of the current.

Conclusion

Modern Grundfos models meet all the requirements of the current time. Therefore, giving preference to them, the owner can be sure that there will be no problems not only in the operation of these installations, but also during their self-assembly. Models possess special pointers , which simplify the process of installing the pump on your own. However, in the absence of even the slightest experience in this matter, it is not recommended to start such work. The probability of a mistake here is very high, and the consequences of even the slightest miscalculations can be expressed in the form of serious accidents.

ALPHA2 pump is the most economical pump in the world, with a record-breaking Energy Efficiency Index (EEI) for of this type equipment – 0.15 (according to TÜV study)

In addition to exceptional reliability, the pump has a wide range of functionalities: three fixed speeds, three constant differential pressure modes, three differential pressure proportional control modes, patented AUTO function ADAPT and the function of automatic transition to night mode.

Features and Benefits:

Patented AUTO function ADAPT ;
Three fixed speeds, three constant differential pressure modes, three differential pressure proportional control modes;
Function of automatic transition to a night mode of work;
NEW! Function summer mode;
NEW! Increased starting torque ensures quick and easy start of the pump;
NEW! Dry running protection;
NEW! Increased the lineup(up to 8 meters of pressure);
High efficiency– motor on powerful neodymium magnets;
Easy and quick connection without the use of a screwdriver with the new Alpha plug;
Power consumption 3 to 50 W, model 25-40 (3-18 W);
When connecting pumps via a UPS (source uninterruptible power supply) significantly increases the period of operation of the entire heating system due to the low power consumption of the pumps
It is not required to remove air from the pump;
Graphic display: operating modes, current consumption electrical energy, current characteristics of the coolant supply (flow meter);
Cataphoresis coating of the flow part provides effective protection against corrosion and excellent hydraulic characteristics;
The heat-insulating casing is delivered complete with the pump;
Produced in Denmark.

Air removal

In order to bleed the pump at the time of commissioning, it is necessary to set the high (III) fixed speed mode for a short period of time. After this procedure, it is possible to set the required operating mode.

Increased starting torque

The pump will start without problems even after a long inactivity of several months

If the summer mode function was not enabled before the summer season, lime deposits could potentially block the pump. ALPHA3 starts to vibrate during start-up, trying to spin the rotor with increased starting torque up to 27 Nm, thereby destroying any dirt deposits.

Summer mode function

The function protects the pump and the heating system as a whole from “souring”

Heating systems that have not been in operation for several months often develop limescale deposits that can potentially prevent the pump and system from starting normally before being prepared for heating season. The summer mode function, activated just before the start of the summer season, protects the pump rotor and the heating system as a whole from souring. Once a day, the pump will start and run at minimum speed for two minutes, which is enough to protect the rotor and system. At the same time, electricity consumption is reduced to an almost absolute minimum.

Dry run protection

Built-in dry-running algorithm provides ALPHA3 with unrivaled protection and durability

Built-in dry-running protection with automatic restart prevents premature pump failure. The protection operation algorithm is a “thinking” mechanism that is able to determine the cause of a dry run: fluid leakage in the system, an air “plug” or shut-off valves in front of the pump are closed. With dry run protection life cycle ALPHA3 is greatly increased.

Cataphoretic coating of the hydraulic part

The special coating of the hydraulic part of the ALPHA2 pump serves to effective fight with metal corrosion both from the inside - in the case of using poorly prepared water as a coolant; and outside - in the case of using the pump in air conditioning systems, when condensate forms on the pump housing due to low temperatures of the coolant.

The cataphoretic coating also improves the hydraulic efficiency of the ALPHA2 pump.

Heat insulating casing

Now heat loss through the pump housing will be less with the use of a heat-insulating casing, which leads to lower energy costs during the operation of your heating system. In addition, the chances of getting burned on the pump housing tend to zero.

Operating modes

Constant Differential Pressure Mode

This mode is used in those systems where the flow rate of the coolant is variable over time, and the value of the pressure drop must remain constant. A prime example such systems can serve as a collector wiring of underfloor heating circuits (see figure)

Differential pressure proportional control mode

This mode is used in those systems where, with a time-varying coolant flow rate, it is permissible to change the pressure drop in order to reduce electricity costs. An excellent example is the two-pipe heating system of a private house using thermostatic fittings (see figure).

Fixed speed mode

This mode is provided for those systems where it is necessary to operate the pump at a fixed speed. For example, for installation on loading a boiler. And also for those systems where the operating point does not fall within the field of characteristics of the AUTO Adapt function. An example is a single-pipe heating system of a private house without thermostatic fittings (see figure)

Note. This mode also serves to remove air when starting the pump.

NIGHT MODE

The ALPHA2 pump automatically switches to night mode when a temperature drop of more than 10–15°C is detected in the discharge pipe for approximately 2 hours. The rate of temperature drop must be at least 0.1 °C/min. The transition to normal operation takes place as soon as the temperature in the discharge pipe rises by approximately 10°C.

IMPORTANT: The pump must be installed in the supply line!

AUTO ADAPT

This mode satisfies the needs of 80% of the circulation systems in private homes.

PLUG IT IN AND GO

At Grundfos we believe in making the complex simple and innovative technologies intuitive.

AUTO function ADAPT reflects this philosophy. It extends the benefits of electronically controlled pumps and even makes them easier to install. The pump with the AUTOadapt function constantly analyzes the system in which it is installed, and as the flow rate changes, it adapts to it.

WHAT IS AUTO ADAPT?

Developed and patented by Grundfos, AUTO technology ADAPT serves several purposes:

Improving the function of regulating the speed of rotation of the engine;
Self check the pump of its compliance with the system;
Achieve perfect comfort with minimal energy consumption.

NEW BENEFITS

AUTO function ADAPT in ALPHA2 is the second generation of well-known and recognized technologies that are familiar to our customers from the MAGNA series. AUTO setting ADAPT - perfect choice for more than 80% of systems.

The second generation of the AUTO function ADAPT for ALPHA2 has two significant improvements:

It does not need to reach the maximum of the pump performance curve in order to adapt to the requirements of the heating system;
It allows the pump to adjust the performance curve both up and down.

ELECTRONIC CONTROL

Grundfos electronically controlled pumps (E-pumps) are capable of "intelligent" capacity control. We have integrated a frequency converter to automatically adjust the motor speed so that the pump generates required pressure in system.

"Proportional pressure function" - means the support of pressure depending on the supply. The head decreases in proportion to the decrease in flow until, at zero flow, a head value equal to 50% of the set value is reached.

avoiding permanent job at one speed, Grundfos smart pumps operate on a proportional pressure curve. This makes them much more efficient than standard three speed pumps.

SPEED CONTROL RESPONSE TO CHANGING CONDITIONS

Heating demand various rooms consists of several factors. They include outside temperature, level sunlight, the use of electrical appliances and other sources of heat.

Pump equipped frequency regulation, automatically adjusts performance according to changing needs. This allows you to match the thermostat settings, while consuming a minimum amount of energy.

STANDARD PUMP - UNEXPECTED COSTS

The standard three-speed pump runs at a fixed speed all the time, regardless of the actual heating demand. This represents unjustified actions, such as driving a car without releasing the gas pedal.

This means that the pump creates pressure even when it is not needed, which causes noise in the system and wasted energy.

E-PUMP - MUCH MORE EFFICIENT

Grundfos smart E-pump does not generate overpressure. Continuing the comparison to a car, the E-pump cuts off the throttle to slow down, and it does so whenever it can slow down on its own without any extra effort.

Result? Significant reduction in energy consumption. Electronically controlled pumps with a low EEI result in savings of up to 80% compared to conventional pumps (class D). Under normal circumstances, it takes the end user about two years to recoup the initial additional cost of purchasing a new pump. Combined with Grundfos' reputation for quality and reliability, this translates into cost savings for years to come.

HOW IT WORKS?

ALPHA2 with AUTO function ADAPT selects the minimum possible head that meets the requirements of the system. It will constantly find the operating point that provides the optimum level of comfort with minimal energy consumption.

FACTORY SETTINGS

AUTO setting ADAPT on ALPHA2 starts at the factory with a set operating point on a reference curve. This proportional pressure curve is located in the center of the AUTO control range. ADAPT .

The pump starts evaluating the heating circuit from the set operating point. If the actual operating point deviates from the set point in time, the pump automatically adjusts the corresponding performance.

In other words, if the demand of the heating system exceeds the set duty point, the pump will select an increased proportional pressure curve. If the requirements are lower, a lower curve will be selected.

NEW SETTINGS

When the pressure proportional curve settings are changed to adapt to the requirements of the heating system, AUTO ADAPT automatically sets a new reference operating point. With new settings, the process starts again: AUTO ADAPT will constantly adapt to changes in the heating scheme.

INSTALLERS AND USERS

As a result of several studies, it turned out that most installers never determine specific parameters and do not produce hydraulic calculation those heating systems in which they install pumping equipment. Consequently, it is difficult for them to find the right pump designed for a particular system, install it and configure it correctly.

With ALPHA2, the installer after completing the installation and selecting the AUTO function ADAPT, can leave, being sure that the pump will adapt to the system and automatically select the optimal settings.

Heating customers need savings on utility bills and electricity, reliability and durability of equipment - ALPHA2 meets and even exceeds these requirements, maintaining a balance between energy efficiency and optimal level comfort.

One of the most attractive features that circulation pumps – price. Pumps of this series are designed specifically for regulating the operation of heating systems. The circulation pump is no less in demand Grundfos (grundfos), fully controlled by one key. Buy circulation pumps of this series you can in our company.

The classic installation scheme of the heating system - natural circulation coolant. Along with the advantages, such a connection also has a number of disadvantages: the slow movement of the coolant, which entails a decrease in its temperature in the return, and the uneven distribution of hot water over the batteries. These factors reduce the efficiency of the heating system as a whole.

The solution to this problem is to install a Grundfos pump for forced circulation hot water.

1 Varieties of Grundfos pumps for heating

The Danish company produces pumps of two types: with a dry and wet rotor.

Grundfos dry rotor circulation pumps for heating systems have high efficiency and high power. For the efficient operation of such equipment, a large volume of coolant is needed, so they are used on large industrial enterprises or in heating systems of buildings with a large area.

For heating systems in private households, pumps with a dry rotor brand GrundfosTP are used extremely rarely. Distinctive feature models - rotor not in contact with water. The dry-type Grundfos circulation pump makes a lot of noise when the engine is on.

Pumps with a wet rotor have an efficiency of no more than 50%, but they work almost silently. For high-quality operation of such equipment, it is necessary to use a high-quality coolant, then the service life of the device is extended to 10 years. The design feature of such models is the rotor immersed in the coolant, as well as the exclusion of the formation of air pockets in the system.

GrundfosUPS pumps with 3-speed switching system are suitable for domestic heating systems. The speed control of the circulation pump is carried out manually or automatically. The second option allows you to reduce energy costs and set the operating mode of the equipment for a long time.

For double-circuit boilers and "" systems, GrundfosAlpha pumps are used.

1.1 Advantages of Grundfos pumps

The Grundfos heating circulation pump has a number of advantages that determine the popularity of equipment in various fields:

Pumps from the Danish manufacturer Grundfus are lightweight and small in size.
In operating mode, wet rotor pumps are almost silent and do not create discomfort.
Heating equipment consumes 60% less electricity than similar pumps from other manufacturers, so their use is economically feasible.
The simplicity of the design of the unit allows you to repair it, if necessary, with your own hands, without involving specialists. The pump is connected to the network with a conventional plug, and the indicator light on the housing shows whether the engine is running or not. Since the Grundfos pump is adapted to almost 90% of heating systems, you can install it yourself without any problems. If necessary, the factory settings can be changed.
Grundfos circulation pumps for heating are practical and reliable: the built-in release function reduces the possibility of rotor jamming and thus increases the service life of the unit. Thanks to its versatility, you can choose equipment for any heating system.

1.2 Specifications

To have an idea about the device and functions of Grundfos pumps for heating, it is enough to get acquainted with the popular UPS 25-40 pump model. For this device, nozzles with a diameter of 25 mm are provided, and a supply pressure of 40 dm. These numbers are on the label. Such a pump is suitable for the heating system of a one-story house or cottage. If a single-pipe system is equipped, then the pump will also cope with heating a two-story house.

Additional technical characteristics of the unit:

The power given out by the device when switching speeds corresponds to 25-45 W;
The volume of the heat carrier is 3.5 m 3 /h;
The length of the device between the nozzles is 180 mm;
Unit weight - 2.6 kg;
The mains voltage for the operation of the pump is 220-230 watts.

Grundfos 25-80 - new generation circulation pump

The pump motor is made of high-quality aluminum, the body is made of cast iron, and the steel rotor is made of a solid part. These durable ones are specially selected in such a composition that the device can withstand high-temperature coolant.

This is especially true for ceramic bearings, since ceramics not only reduce rotor noise, but also withstand harsh operating conditions for at least 10 years.

Recently, the manufacturer Grundfos has been producing pumps with technopolymer bearings and a ceramic rotor. This solution increases the efficiency of the device and extends the service life.

1.3 Secrets of the new GRUNDFOS pumps for heating (video)

2 Nuances of installation

To achieve efficient operation of the unit, it must be installed only on a horizontal surface. Devices with a wet rotor are mounted on the supply circuit, and with a dry one - exclusively on the return line, since in dry-type pumps the seals are made of rubber or paronite. Heat coolant disables them quickly enough.

IN without fail a coarse filter is installed in front of the Grundfos heating circulation pump, which will save the equipment from impurities and extend its life.

If electricity is often cut off in the house, then a bypass is installed for uninterrupted heating.

When choosing pumping equipment from Grundfos, attention is paid to the amount of pressure, since it determines whether the unit can raise the coolant to the desired height. Single pipe system heating implies the inclusion in the circuit of a pump with a lower pressure than a two-pipe one.

3 Features of Grundfus equipment

Compliance with the rules of operation and installation will allow you to use Grundfus pumps as efficiently as possible for a long time:

At self installation pumps, it is impossible to confuse the direction of the pipes, since an arrow is applied to the body of the product indicating the direction of rotation of the rotor, that is, the movement of the coolant.
Fasteners are not provided in the package of the device, so you will need to take care of their purchase in advance.
The circulation pump should only operate at positive temperatures in the room. If the device was stored or transported at a temperature below 0 0 С, then it is recommended to start it after installation not earlier than in a day.
The optimal connection to the network is a separate cable from the switchboard.