Grundfos circulation pumps for heating - characteristics and selection criteria

Circulation pump device Grundfos

Glandless circulation pump for home heating system

According to their design, circulation pumps for heating Grundfos are divided into two types: with a "wet" and with a "dry" rotor. The first of the constructions historically appeared before the second version. It is based on a body made of cast iron, steel, bronze or aluminum, inside which a movable rotor is located in an aqueous medium. An impeller is installed on the shaft, which sets the working fluid in motion.

Pumps with a "dry" rotor began to be produced a little later, the engine and the liquid in them are separated from each other. First class pumps are highly reliable thanks to liquid lubrication. But at the same time, the efficiency of such devices is very small (no more than 50 percent).

For units with a "dry" rotor, the efficiency is slightly higher (it reaches 70%). These models are most often used for industrial purposes, where operating conditions involve pumping large volumes of water. For domestic needs, circulating pumps operating on a "wet" circuit are usually used.

Types of devices for heating systems

Grundfos pumps designed to work as circulation pumps are divided into two main groups, the difference between which lies in the operating conditions of the rotor of the drive motor.

If only the pump impeller comes into contact with the pumped liquid, then this design is called "With dry rotor".

If both the impeller and the rotor of the engine are in the transported liquid, this is a pump according to the characteristics with a wet rotor.

Both types of construction have their own characteristics and areas of application.

Dry

Dry rotor is good high efficiency installation and high power. And also pumps of this type are little sensitive to the quality of the coolant and calmly tolerate pollution suspensions and fine abrasives. Operates at temperatures significantly higher than the permissible operating values ​​of glandless pumps.

Photo 1. Disassembled Grundfos circulation pump for the heating system, equipped with a dry rotor.

Of the minuses - shorter service life, relatively high cost, slightly larger dimensions, the need for regular maintenance (lubrication), high noise. For this reason, dry rotor models are best fitted in a separate room. But at the same time they are able to "pump" large cottages or even apartment buildings.

Wet

Wet rotor is more compact, virtually silent, extremely durable with correct installation. Does not require maintenance during operation, but less productive, with a relatively low efficiency - no more than 50%.

With a general low power consumption (on average 6-100 W depending on power, mode and load), this characteristic is not decisive.

This type of pumping equipment is extremely sensitive to the quality of the pumped liquid, since it is both a lubricant and antifreeze for the rotor. Therefore, such devices cannot operate at a temperature above 115 degrees and require the mandatory installation of a strainer in front of the pump.

Photo 2. Grundfos compact circulating pump with a wet rotor, sensitive to the quality of the pumped liquid.

Wet type devices are widely used in individual heating systems and water supply as additional circulation pumps of the make-up line.

Specifications

The main technical indicators to which attention is paid when choosing a suitable equipment model are:

• a graph of the dependence of the fluid pressure on the amount of its supply to the system;
• power consumed by the engine of the unit from the network;
• coolant performance;
• permissible temperature of the pumped medium;
• dimensions and weight of the device.

Devices are selected according to power depending on the volume of pumped water

The first of the characteristics makes it possible to understand what volumes of water are pumped by the pump, depending on the pressure developed in the system. The higher this indicator, the less water resource must be passed through the unit to obtain the required pressure. To correctly select a sample of equipment, the operating point must be located under the curve of the graph. When choosing this indicator, it is desirable to provide a supply margin of at least 20%. Another parameter is directly related to it - pump performance.

The power taken from the network is determined by the amount of current in the load and the supply voltage (220 or 380 volts). This parameter is taken into account when selecting protection devices for current supply circuits and when calculating the cross-section of wires that are part of the supply lines of power supply. The specified value depends on the performance of the pumping equipment, which increases with its increase.

The dimensions of the purchased sample and its weight are also taken into account when choosing a suitable model. This also applies to the operating conditions of the pump - the minimum and maximum permissible temperature of the pumped medium. The reliability and durability of the purchased sample depends on the correct selection of this indicator.

Grundfos pump types and their features

Grundfos pumps in Russia are produced, which is located in the Istra district, Moscow region. As for the roots of the brand, here the founder country is Denmark. The company provides a wide range of working models, each of which is designed for a specific application. According to this indicator, the following types of Grundfos pumps are distinguished:

• borehole deep Grundfus;
• autonomous pumping unit;
• drainage and sewerage submersible options;
• pressure boosting station;
• circulation pump.

Each of the segments is represented by basic models and a number of modifications to them.

Downhole devices Grundfos

Devices of this type are presented in three main series:

1. The 3-inch series of pumping units includes 31 models with different delivery heights and capacities. The series is conventionally divided into segments: SQ 1, with a capacity of up to 1.7 m3 / h; SQ 2 with an indicator of 3.5 m3 / h; SQ 3 for 4.4 m3 / h; SQ 5 - 7.5 m3 / h; SQ 7 - 9 m3 / h.
2. SQE devices are a separate series. Seven models actually repeat the previous lineup. The difference is that a mechanism is installed on them, with the help of which the frequency of operation is regulated and a constant pressure is maintained inside the pipeline. This possibility is provided by means of a frequency converter G
3. The series introduces high performance 4 "stainless steel pumps. The depth from which the devices lift the liquid varies, depending on the model, from 20 to 500 m.

Model range of Grundfos pumps
All borehole models use the centrifugal principle of operation and are equipped with protection against overheating, dry running and sudden voltage drops. The impellers of the apparatus are made of ceramics or tungsten-based polymer. Installation is carried out directly into the water column of the source. The minimum borehole diameter is 76 mm.

Autonomous pumping units from the manufacturer

This segment of the company's products is represented by the MQ, JPB series and the universal JP surface water pump. All models are designed to create an uninterrupted, stable water supply at home or outbuildings.

The MQ series consists of two main models: MQ 3-35 and MQ 3-45.The main components of the apparatus are an electric motor and a self-priming pump. All this is protected by a stainless steel housing and a high-strength polymer composition. The design is supplemented with a pressure tank with a membrane, which maintains the required pressure in the device and prevents frequent switching on and off of the device.

As for the technical characteristics of Grundfos MQ pumps, they are as follows:

• engine power - 850 W (MQ 3-35) and 1000 W (MQ 3-45);
• productivity - 3.5-4.5 m3 / h;
• the head is maintained at a distance of 35-43 m.

The units are equipped with overheating and idle protection. In addition, the installation of the pump is very quick, thanks to the wide, stable base and universal connections.

The JPB range is represented by two models JPB5 and JPB 6, as well as two modifications with enlarged pressure vessels. These are automatic centrifugal pumping stations that are designed to work with clean water without mechanical impurities. The device is made mainly of stainless steel. Consists of a pressure tank of an electric motor and a multistage working part.

This product has the following description of the main performance indicators:

• rated power of electric motors - 780-1400 W;
• the maximum indicator of the head distance - 48 m;
• performance characteristics of devices - 3-4.5 m3 / h;
• tank volume - 24 l (60 l for modifications).

All models of the segment are equipped with a proprietary Grundfos mechanical seal and a pressure gauge that shows the pressure inside the system. If necessary, these components can be purchased separately and replaced in case of repair.

Pump Grundfos JPB5

The JP ejector is a universal device and is used both as an automatic water supply station and for local pumping of water from tanks, barrels or shallow wells.

The device is supplied in two versions:

1. The body and main parts are made of high-strength plastic, and the upper part is equipped with a handle. Used for local work and transportation.
2. Half of the body is made of plastic, while the base plate and the other half are made of stainless steel. Mainly used for stationary work.

As for the performance of Grundfos ejector pumps, their technical characteristics completely bypass many other companies. The main indicators of the device are as follows:

• unit power - 1.4 W;
• delivery distance - 40 m for model JP 5, 45 m - for JP 6;
• delivery volume - 3.5-4.5 m3 / h.

Drainage and sewage pumping equipment Grundfos

In this area of ​​pumping equipment, Grundfos Isstra supplies the market with over ten series of drainage and sewerage units. The most popular among them are:

1. DP. This series is a single-stage centrifugal apparatus used for pumping water with inclusions up to 10 mm in diameter. Suitable for draining a basement or foundation pit. The capacity of devices in this category is 45 m3 / h, and the head remains at a distance of 25 m. The motor shaft is sealed with a special mechanical seal for the G pump
2. EF. A series of cast iron drainage units suitable for pumping waste water in laundries, wash basins and utility rooms. Not suitable for toilet or drain. Allows fractions up to 30 mm. Productivity 45 m3 / h. The head is maintained at a distance of 22.5 m.Also equipped with a mechanical seal for the G pump
3. Grundfos dwk. The Grundfos dwk series is designed to handle the most polluted water. Cast-iron models are used at construction sites, for pumping water when digging pits and tunnels, for pumping out sewage fractions. The devices provide the volume of pumped out water - 150 m3 / h. The head is maintained at a distance of 51 m.
4. AR. This series is designed to work with light industry waste water and sewage waste.Also suitable for draining small ponds and cellars. All models are made in a steel case. The operation of AR devices is based on the centrifugal principle of operation. In APV versions (AP35B or AP50B), marking B means the vortex principle of action. The numerical designation at the end of the model name indicates the sizes of the skipped fractions.
5. This series is represented by models of pumping equipment that must be installed instead of a toilet cistern or as a separate block of a bathroom. A number of five models are presented. Designed for toilet, shower, sink wastewater. Simultaneous connection is possible.

Pressure boosting equipment

Grundfos booster pumping stations are represented by the Multi-E and Hydro MPC units. Both units are based on the joint operation of several high-performance pumps of the CRE series with a frequency controller. Such stations provide the highest productivity and delivery head, which makes it possible to use them for water supply, schools, hotels, office centers, apartment buildings.

Installation of Grundfos Multi-E

The Multi-E station is equipped with two CRE devices and is equipped with a control unit with the ability to switch between several operating modes. The capacity of the model is 144 m3 / h and the pressure is maintained up to a height of 150 m.

Hydro MPC works on the basis of four devices connected in series and is controlled from a special Control MPC panel. The station's capacity is 1080 m3 / h, and the head is 155 m.

Circulating apparatus

The Grundfos electric booster pump is used to enhance circulation inside the heating circuit and, as a result, stabilize heating in all sections of the system. The segment is represented by the series UPS, UPSD, ALPHA +.

The most popular UPS series models:

1. Grundfos 15 50 130. The productivity of the device is 3.3 m3 / h, and the pressure is maintained up to 4.7 m.
2. Grundfos 25 60 130. Like the previous model, it cuts vertically into the pipe. Equipped with a wet rotor motor. Provides a flow rate of 2 m3 / h. Feed - 3.7 m.
3. Grundfos 32 40 180. The device is designed for vertical installation. Designed for a small section of the heating circuit. Pumps 3 m3 / h of liquid. The feed is maintained at a distance of 4 m. Equipped with 3 gears.
4. Grundfos 32 60 180. Provides a pumping volume of 4300 l / h. Delivery up to 6.5 m. Installed horizontally.
5. Grundfos 32 80 180. The device with a wet rotor runs absolutely silent. It can be used in three different modes. Delivery of the device is 14 m3 / h. Head - 8 m. Maximum liquid temperature - 110 degrees.

The UPSD range differs from the standard range in that it includes twin UPS units. The ALPHA + range includes more modern devices that differ in class A in energy consumption. Maintain a head up to a distance of 5.5 m.

How to identify a fake pump Grundfos UPS 25 40 180 (video)

Advantages and disadvantages

The pump in the underfloor heating system works silently - it can be located in the house next to the living rooms

The advantages of pumps from a Danish manufacturer include:

• high work efficiency;
• reliability of all units and parts;
• low level of intrinsic noise;
• versatility of application.

Grundfos pumps are used as part of heating systems and are in demand for organizing hot water supply (DHW) circuits. In addition, they can be installed in floor heating systems or in climatic equipment.

The versatility of Grundfos units is also manifested in the fact that after purchasing them, the user will be able to work with the following types of coolants:

• water heated to a certain temperature;
• antifreeze that does not contain solid components;
• heat carrier with the addition of ethylene glycol in a volume of not more than 40 percent.

The advantages of equipment samples of this class include the operation of the rotor in direct contact with the coolant; it is separated from the rest of the units by a metal glass made of stainless steel.In addition, in these models, the inlet and outlet pipes are located at the same level, which leads to the quiet operation of the entire unit. The significant advantages of products from a Danish manufacturer include:

• optimal ratio of the declared price and quality;
• high rates of energy efficiency;
• a large selection of models that can satisfy the most demanding customer;
• long service life and advanced technical support system.

The characteristic disadvantages of Grundfos pumps are considered to be a relatively high price per unit of goods (from 6500 rubles) and the absence of a cable for connecting to the mains in the kit.

Popular models

Next, you will see an overview of the models with detailed descriptions. We will tell you about their technical characteristics, consider the features and differences. We'll start with one of the leaders - the high capacity UPS 40 120 F model.

Circulation pump Grundfos UPS 40 120 F

The presented model is distinguished by high performance, passing through itself up to 18.5 tons of water per hour. The hydrostatic head is 9 m, the maximum working pressure in the system is 10 atm. The device is able to work with coolants, the temperature of which ranges from -10 to +120 degrees. There are three shaft speeds with power consumption from 440 to 470 W. The impeller is made of stainless steel, the body is made of strong and durable cast iron, and the radial bearings are made of ceramics.
The Grundfos UPS 40 120 F circulation pump has a low noise level, but is not suitable for domestic use. Its price is about 32-33 thousand rubles.

Circulation pump Grundfos UPS 25-60 180

Grundfos pumps for heating households are represented by many successful models. The highest user rating was received by the UPS 25-60 180. It is capable of passing through itself 4.35 cubic meters. m / hour, while consuming no more than 60 watts. The model is designed to work with clean water with temperatures from +2 to +110 degrees. It features small dimensions and low noise level. The head is 5.6 meters.
The analysis of user reviews showed the unanimity of the owners. They note the absence of clearly audible noise, the absence of leaks and the high-quality construction. Potential users would not hesitate to take circulation pumps from Grundfos.

Circulation pump Grundfos ALPHA2 L 25-40 180

Before us is another surface apparatus with a maximum productivity of 2.4 cubic meters. m / hour and a pressure of 4 meters. It works with clean water and other types of heat transfer fluids and is oriented towards vertical installation. There is electronic control on board with LED indicators. The model is able to automatically adjust to the required heating parameters, changing the pressure in the heating system and creating the most comfortable conditions for people to live.
The Grundfos ALPHA2 series of circulation pumps is very interesting in itself. Its main functions are:

• Operation in "summer mode" - prevents shaft acidification and provides an easy start;
• "Night saving mode" - will ensure a reasonable consumption of heat;
• Built-in electronic flow meter - provides easy balancing of the heating system.

The equipment can operate in any type of heating system, consuming a minimum amount of electricity - a maximum of 22 watts.

Circulation pump Grundfos UP 15-14 BUT

This model is interesting for its unusual forward-elongated shape. It is low power - consuming only 25W, it delivers 0.5cc performance. m / hour with a maximum head of 1.4 m. The minimum water temperature is +2 degrees, and the maximum is only +95 degrees. It can be installed both vertically and horizontally. The weight of the device is 1.16 kg. User reviews speak of its reliability, but at the same time they reject the work of the built-in thermostat a little.

Circulation pump Grundfos UPS 32-60 180

Another contender for the title of the most popular and demanded pump for heating systems. The pump provides a capacity of 3.35 cubic meters. m / h with a maximum head of 5.75 m. The electrical power consumption is only 60 watts. Installation is carried out in any position, both vertically and horizontally. Consumers will be pleased with the almost complete absence of noise and a long-term safety margin. The average cost of a pump is about 7,400 rubles.

Circulation pump Grundfos UPS 32-40 180

Before us is a typical pump for heating or a pump for a boiler from Grundfos. Compared to the previous model, its technical characteristics are more modest. It consumes only 45 W from the electrical network, the maximum performance is 2.72 cubic meters. m / h at a head of 3.9 m. A three-position shaft speed switch is provided on board to balance the system. The pump motor is characterized by increased noiselessness. It works with many coolants with temperatures ranging from -25 to +110 degrees. As we can see, the temperature range in this model is extended.

Circulation pump Grundfos ALPHA3 25-40 130

This pump is a real technological breakthrough in the production of pumping equipment. It works in two-pipe heating systems and in underfloor heating systems, ensuring their flawless regulation. Its cost may seem high, but it can save up to 15-20% of natural gas per year. The throughput of the device is 2.55 cubic meters. m / hour at a pressure of up to 4 meters. The noise level is less than 43 dB - there is practically no noise if you do not listen. Working pressure in the heating circuit - up to 10 atmospheres.
The casing of the Grundfos circulation pump is made of durable cast iron. The type of rotor used is the traditional "wet" type, as in all domestic pumps. The pump works with various types of coolants with temperatures from +2 to +110 degrees. Other interesting features and functions:

• "Summer mode" to prevent rotor acidification;
• Instant start when connected to the mains;
• Low power consumption;
• Complete thermal insulation;
• Control and balancing of heating systems from the screen of a smartphone or tablet - the circulation pump is equipped with a wireless connection unit;
• Ceramic bearing and rotor shaft;
• Powerful four-pole motor.

In other words, it is a great choice for every consumer. The price bites a little, but you get a pump at your disposal that saves you money and gives warmth in the floors and in the batteries.

Selection features

The size of the union nut depends on the diameter of the pipes to be connected.

When choosing the right sample of pumping equipment from Grundfos, much attention is paid to the diameter of the union nuts. It is selected depending on the size of the pipe being prepared for installation in the heating system:

• if a polypropylene pipe with a standard size of 20, 25 mm is used - nuts with a diameter of 25 mm are suitable for installation;
• when using pipes with a larger diameter (or steel billets from 25 mm and above), it makes sense to purchase equipment designed to use union nuts with an inner diameter of 32 mm.

If the listed requirements are met, the installation of the equipment will not cause serious problems if you follow the instructions in the instructions.

Installation nuances

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, since in dry-type pumps the gaskets are made of rubber or paronite. The high temperature of the coolant destroys them quickly enough.

It is imperative that a coarse filter is installed in front of the Grundfos circulation pump for heating, which will save the equipment from the ingress of impurities and extend its service life.

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

When choosing pump equipment from Grundfos, they pay attention to the amount of pressure, since it depends on it whether the unit can raise the coolant to the desired height. A single-pipe heating system implies the inclusion of a pump in the circuit with a lower pressure than a two-pipe one.

Pump energy efficiency

Renowned European pumping equipment manufacturers have made great strides in optimizing energy consumption by introducing several wet rotor models to the market. This was achieved through the use of modern DC motors, controlled by a controller. Such models belong to the equipment of class "A", which is considered the most efficient in terms of minimizing energy losses - their consumption does not exceed 0.09-1.3 kW).

Grundfos specialists have developed a whole series of energy-saving pumps called ALPHA2 and MAGNA3. The first ones are distinguished by simple functionality and are intended for use in heating and hot water supply systems in private houses. Models of the second type have the AUTOAdapt function, which allows you to automatically set the optimal power consumption mode. Their capabilities correspond to modern requirements for indicators of efficiency and productivity of equipment of this class. They are designed for use in heating systems of private houses and industrial enterprises.

Circulation pumps from GRUNDFOS

Why buy a GRUNDFOS circulation pump

Circulation pumps from GRUNDFOS do not require mass and noticeable advertising, they have long won a worthy first place among similar mechanisms from other companies. But what allows GRUNDFOS UPS 32/40, UPS 32/60 and UPS 32/80 and pumps with other capacities to ensure uninterrupted operation in the heating and hot water system?

Often, for many reasons, heating systems are not able to provide a room, a building or an entire complex with a sufficient amount of heat. Many disadvantages associated with the delivery of the coolant "to the address" can be solved by circulating pumps on the world market. Among the huge number of companies, proposals for these devices and the existing competition, pumps of the GRUNDFOS company have won a worthy place among heating equipment. They provide uninterrupted circulation of the coolant and can perform complex technological tasks in various conditions.

For example, more powerful units of the TP series (TPD, TPE, TPED) are designed to circulate water (heat carrier) in large systems such as enterprises, industrial complexes or in boiler houses that provide heat to entire neighborhoods. But in order to provide heat to a private house or a large apartment, you can install a pump from the UP series (UPA, UPS) into the system, which will perfectly cope with the pressure increase and improve circulation in the autonomous system. For example, UPS 32-40 is specially designed to work with one and two-circuit heating boilers. Thanks to this, it can ensure uninterrupted operation both in the heating system and in the hot water supply system. Despite the fact that this series of pumps is much weaker in power than pumps of the TP series, nevertheless, they differ in their technical characteristics in their subgroup. Their power range ranges from 25W to 245W. These capacities allow pumping from 1 to 800 cubic meters of water per hour. In this case, the pressure in the system is 8-9 atmospheres. Some models with a remote control, but the GRUNDFOS UPS 32/60 with manual adjustment, which did not affect its performance and popularity in any way.

Models of different series with different power, which includes circulation pump type GRUNDFOS UPS 32/80equipped with automatic control units. They monitor all pump operating modes and, if necessary, adjust the mechanism for the time of day and seasons. Do not think that these are noisy mechanisms.Even the most powerful models run almost silently. The power setting is in three levels and can be changed if necessary. But these pumps have one drawback - they can only work in a horizontal position, which is not always possible when installing a particular system.

Compact, automatic, 12 control modes, economy - this is what can be briefly announced about the new GRUNDFOS ALPHA3 pump, it is impossible to briefly describe it due to the many advantages of a small pump with excellent technical characteristics built into one casing.

Now, in detail about how GRUNDFOS engineers have succeeded, from a small state - Denmark.

1. The most important and paramount thing for the ALPHA3 pump is energy efficiency, according to testing by one of the largest research company and a member of the association of world scientists under the auspices of the VDE, six different manufacturers of circulation pumps with the same technical parameters were selected, including a new pump from GRUNDFOS participated in the test. Scientists, based on the multilevel tests carried out under the same operating conditions and time intervals, have recorded and certified the entire line of ALPHA3 pumps as the most economical circulation pump for heating with technical data for delivery heights of 4 and 6 meters. When used in mixing units on a warm water field, this effect is most noticeable and recommended for use by all the best installation organizations in the city.
2. Another implemented development, which does not exist in any pump in the world. SUMMER mode function - protects the pump shaft from acidification, how does it work? In heating systems of a house that were not working for several months in a row (SUMMER), lime deposits are often formed in the pump housing, fixing the impeller and the clearances of the shaft with bearings. All these are capable of preventing the first normal pump start-up at the beginning of a new heating season. The pump itself will save you from this kind of problem, once a day it will start up and run the fluid throughout the system at the lowest speed for two minutes. We enable this function at the final stop of heating for the summer period.
3. The bearings installed inside the pump are reliably protected from the adhesion of small particles, scale, which is formed from the high temperatures of the heating system. The pump is equipped with an ultra-efficient powerful yet modern small size permanent magnet motor. This motor creates a force magnetic field inside the pump, which in turn carries some problems, the engineers had to work hard on designing the compactness of the shaft, the reliability of the new bearings. A simple, but most practical solution was made, to make a shaft with bearings from the most durable ceramic non-magnetic materials, so that there would be no physical possibility of adhesion of the smallest metal particles (scale) that are always present in pipes. The use of such materials perfectly prevents clogging of the high-precision gaps between the main working mechanisms of the pump.
4. With the permanent or temporary use of modern pumps of the GRUNDFOS brand in the heating system of a house or non-residential building, you get a reliable assistant for guaranteed uninterrupted operation in the winter. There is a well-reasoned explanation for this, if for some reason the summer mode function was not turned on when the heating was stopped, the pump can start on its own without problems. At the first start-up, the pump begins to vibrate, trying to spin the rotor with an increased starting torque of 27 N * m, by this action the pump itself destroys any deposits accumulated during the idle time.
5. Progress is making huge strides towards improving the operation of circulation pumps, now ALPHA3 also has a dry-running protection function, previously this smart option was installed only on water pumping stations.
6. Automatic control, operating mode settings, additional pump options, fully corresponds to the previous model GRUNDFOS ALPHA2 L and ALPHA2, making changes to this well-proven device did not give any advantage to the new ALPHA3. Let us recall the functionality of the settings - three modes of manual switching, three modes in AVTOADAPT (automatic setting), night / day mode of operation.
7. ALPHA3 pumps help to balance a heating system made on a two-pipe principle with a floor-by-floor layout (a separate line and from two pipes for each floor of the house, and an installed pump). Heating radiators on the system that have not undergone hydraulic adjustment can work unevenly, ineffectively, and at the same time the rooms farthest from the boiler room remain much colder than those closest to the boiler room. Noise in thermo-adjusting knobs, valves, valves and bills with large amounts for fuel and electricity are also consequences of an unbalanced heating system. Professional installers with extensive experience know that hydraulic balancing of the system avoids such problems. With a new and modern pump, professional balancing of a two-pipe system does not require the call of a specialist tuner. In just an hour in a house with an area of ​​200 meters, the heating system will be adjusted to the correct and economical operating modes by you, following the instructions supplied with the pump.
8. An expanded range of 12 operating modes, this pump can be controlled from a mobile device using the free GRUNDFOS GO BALANCE app. The program will tell you all the necessary settings and balancing systems, provide a full report on the work done.

Stopping your choice when deciding to purchase circulation equipment from GRUNDFOS, you just have to properly dispose of it and invite classified specialists to install or insert heating into the pipeline, the partners of the TEPLOVOZ store will be happy to help in this good business. Installers have extensive experience with GRUNDFOS and attend annual seminars to improve classification and additional knowledge with the GRUNDFOS range. The leading company GRUNDFOS annually provides the market for heating and water heating equipment with modern and updated models for the circulation of various liquids, constantly posts product news on various social networks and has a large audience on TWITTER.

Modes of operation

The modern recirculation pump for heating belongs to multifunctional devices. Various samples of this equipment are capable of operating in the modes indicated in the passport, including "fixed speed". All of them are equipped with a synchronous motor, the operation of which is controlled by an integrated processor. During the operation of the unit, the control unit registers the following basic parameters:

• current strength;
• rotor speed;
• temperature in the working area and others.

Its presence allows you to adapt to a specific heating network with an optimal energy consumption mode.

DIY pump disassembly

If repair is necessary, the equipment must be taken to the service, if the device is under warranty

Any user who has studied the design well can disassemble the purchased sample of pumping equipment, if desired. The need for this often arises when it is necessary to repair it or overhaul with the replacement of worn parts. After complete disassembly, the main working units of the mechanism are inspected, and then checked for wear.

The main focus is on examining the condition of the "wet" rotor. It should be removed and replaced with a new part in the presence of a repair specialist who can control this difficult operation.