Grundfoss Pumps

TheDanish company Grundfos was founded in 1945, it is engaged in the production of pumping equipment for heating, water supply, Sewerage, air conditioning.

Today Grundfos holding is one of the world's leading pump manufacturers. The company has representative offices in 80 countries around the world.

The most popular product in the Grundfos line is circulation pumps for heating systems, and these products account for more than 50% of the market.

Grundfos circulation pumps for heating systems

The Danish manufacturer Grundfos has been manufacturing equipment for more than 70 years, and over the years it has managed to gain a leading position in the field of manufacturing pumps intended for domestic use. This brand has earned worldwide recognition of consumers due to the highest quality of products. This manufacturer's pumping equipment is used in gas boilers of many popular brands, including Viessmann, Baxi, Protherm, Immergas, etc.

In this article, we will look at the types of Grundfos circulation pumps for heating systems, consumer ratings of different models and their features. We will also study the internal structure of the equipment, compare the pros and cons of using Grundfos pumps for Autonomous heating of private homes.

UPS line pumps: models, technical parameters

Pumping equipment of the Grundfos UPS line is in constant demand among customers not only in Russia, but also in Europe. It is used in open and closed heating systems of cottages, residential buildings and small industrial premises. In addition, it is often used in water floor and air conditioning systems. These pumps are recognized by consumers due to their relatively low cost combined with durable materials and high build quality that meets modern standards.

Today, Grundfos UPS pumps are manufactured in different countries: you can find models of Danish, German, Serbian and Chinese production on sale. Pumps of this line can be selected both on the official website of the company and in the online store. The equipment produced by the company has a wide range of performance characteristics and has the following markings:

• Grundfos UPS 25/40;

• Grundfos UPS 32/40;

• Grundfos UPS 25/60;

• Grundfos UPS 32/60;

• Grundfos UPS 25/80;

• Grundfos UPS 32/80.

The first pair of digits in the label indicates the internal diameter of the American nuts used when connecting the pump to the heating system. For Grundfos equipment, this parameter can be 2.5 cm, 3.2 cm, or in rare cases 4.0 cm. The second pair of digits indicates the maximum height to which a particular type of equipment can lift water (4, 6 or 8 meters).

Tips for choosing pumps from the UPS line

The size of American nuts for pumping equipment should be selected based on the cross-section of pipes used in the heating system. In the case of pipes made of polypropylene with a cross section of 2.0, 2.5 or 3.2 cm, the equipment with a nut size of 2.5 cm is suitable.

If the heating circuits use polypropylene pipes of increased cross-section, or steel pipes with a diameter of 2.5 cm or more, the best option is to buy a pump with nuts of 3.2 cm in size and an installation length of 18 cm.

Regarding the height of the water column, we can say with confidence that for a small cottage without a water floor, with one or two floors and a total area of no more^{than 100 m2}, the ideal choice is Grundfos pumps marked 25/40 or 32/40.

For a cottage with an area of 100 to 150^m2, equipped with a water floor without a pump and mixing group, models marked 25/60 or 32/60 are suitable. If the house has 3 floors and a total area of 300^m2or more, it is necessary to connect pumping equipment with operating characteristics of 25/80 or 32/80 to the heating system.

Device of pumps of the UPS line

The body of the pumping equipment can be made of cast iron or stainless steel, in addition, it can be equipped with an air separator. The equipment of the UPS line has three speed modes and a manual controller in the form of a switch located on the box with terminals. Let's consider its schematic structure.

• 1-equipment housing

• 2-stainless steel gasket

• 3-plastic impeller

• 4-bearing plate

• 5-strong and reliable ceramic shaft

• 6-rotor with protection in the form of a non-corroding shell

• 7-paronite gasket

• 8-solid cast ferritic stainless steel rotary sleeve

• 9-plain bearing

• 10-stator and windings

• 11-motor housing made of aluminum

• 12 — screw-threaded plug

• 13-box with terminals

Specific features of the Alpha2 and Alpha2L models

Like the UPS line of equipment, the Alpha2 circulation pump functions almost silently and is highly economical – its power consumption does not exceed 45-60 Watts. However, unlike the previous line, it has a digital screen that displays the current level of power consumption and power indicators.

In addition, Grundfos Alpha2 equipment is equipped with a sensor that protects against " dry " running, a detector that protects against overheating, a special mode that prevents the pump from blocking (jamming) during long-term downtime in the summer months, and an economical night mode of operation.

The key difference between the Grundfos Alpha2 model is the presence of the AUTOADAPT function. In addition to 3-speed modes, as well as proportional and constant pressure modes, the AUTOADAPT function allows the equipment to operate in an automated mode, in accordance with the current needs of the heating system. That is why experts believe that of all the models presented on the world market, it is the pumping equipment of the "Alpha" line that is the most economical.

The equipment housing has a heat-insulating casing and can be cast iron or stainless – Alpha2 (N). The models of this line are supplied with a specialized plug that simplifies and speeds up the installation process. In addition, the company produces a pump with an air separator - Grundfos Alpha2 (A).

The Alpha2L model is a cheaper modification of the Alpha2 line of equipment. It does not have a number of auxiliary functions and a heat-insulating casing. However, this unit is compact and affordable.

Advantages of Alpha3 pumps

The equipment of this line has the same technical characteristics as Alpha2. Its main difference is the ability to perform high-precision balancing of the heating system with minimal time costs.

This speed is achieved thanks to a special device "Alpha Reader", which sends information from the equipment to a smartphone or other mobile device. To use this function, you will need to install a special program "Grundfos GO Balance"on your device.

How is the heating system balanced?

1. Download the free program to your smartphone.
2. In the program, enter the following parameters: the size of all rooms in the house, the number of radiator sections, and the required temperature level.
3. Put the "Alpha Reader" transmitter on the Alpha3 line equipment (purchased separately).
4. Using the fans, adjust the radiators in the rooms in accordance with the indications given by the program.
5. After some time, you will receive a report on balancing the heating system.

The advantages of the pump Grundfos

• - positive feedback from consumers and high ratings from experts;

• - high-quality materials and high reliability of operation;

• - silence;

• - save energy consumption;

• - wide range of models;

• - rich functionality of Alpha line pumps;

• - availability of service centers in many cities of the country;

• - round-the-clock technical support.

Disadvantages of Grundfos pumps

• - relative high cost (from 6500 rubles for the budget version of UPS 25/40);

• — the scope of delivery does not include wires for connecting to the power supply.

Conclusion

We analyzed the device and individual models of Grundfos pumps for heating systems, considered their features, main advantages and disadvantages. In its work, the Danish manufacturer relies on high reliability requirements and the latest technical developments, which makes its circulation pumps reliable and durable.