Circulation pump for underfloor heating Grundfos. Grundfos circulation pumps

The Grundfos circulation pump is manufactured by a Danish company. These devices are used in a heating system with forced circulation of coolant. Grundfos pumps are also installed in the water supply system of a multi-storey building or a small country village with a local pipeline. Cast iron, stainless steel or bronze are used to make the product body. Water does not penetrate inside the device, which is facilitated by the completely sealed body of the product.

Purpose

The need to install a Grundfos circulation pump arises in communications with a low natural level of water or coolant circulation in the system. In this case, forced circulation of liquid is provided

The craftsmen install additionally along with the pump expansion tank or hydraulic accumulator. The device protects the system from water hammer and destruction.

Kinds

It is recommended to select circulation pumps for water supply according to the parameters of the pipeline. The product line of the Danish manufacturer Grundfos includes several series of devices:

UPS 100 - suitable for arranging single-pipe and two-pipe heating circuits. Suitable for installation of heated floors and lines with forced water circulation.
ALPHA2 L – powerful circulation pumps used in heating networks and air ducts. The devices allow you to install a network for air conditioning. Suitable for hot water supply.
ALPHA3 – mounted on a heating pipeline with variable or constant flow. The equipment is immune to temperature changes. Suitable for automated networks where it is necessary to reduce the coolant temperature at night.
UP and UPA – series without oil seals with a wet rotor. Installed to increase pressure in the local main network. Can be mounted in front of the entrance to a dishwasher, washing machine, water heater, shower stall.

Choose equipment based on power level and price. For multi-storey buildings, a Grundfos 40 series pump is suitable, for connection a 40 mm connector is used. A less powerful installation will be required for private households.

When installing a warm water floor system, it is necessary to install a pump. It will be able to overcome hydraulic resistance, forcing water to move through the pipes, regardless of the number of bends, and evenly release heat.

Most often, a circulation pump for a heated floor consists of a motor with an impeller connected to a housing. Additionally, the device is equipped with a nut to bleed water. There are models with two motors, designed for maximum loads (the second one is connected when the first motor cannot cope). They are chosen for large buildings in cold regions.

What to look for when purchasing

When choosing which pump is best for a heated floor, consider the following technical parameters:

Power. It is measured in liters per hour or cubic meters. In order for the pump to cope with the load, this figure must exceed the total volume of liquid poured into the circuit by 3 times.
Motor type. Can be “wet” or “dry”. Hence the names - “wet type pump” for heated floors, “dry type pump”. In the first case, the motor ends up in the pumped water, which cools it. This ensures reliability, silent operation, efficiency and low efficiency (up to 50%). In a “dry type” pump, the motor is hidden in a sealed housing, so it needs to be cleaned and lubricated periodically. The efficiency of such models reaches 80%, they last longer, but are noisy during operation.
Pressure The larger the diameter of the pipes and the length of the system, the greater the pressure the pump for a warm floor should have. If you neglect this parameter, the device may begin to overheat, which will shorten its service life.

There are no strict requirements for the housing material.

The best pumps for heated floors

Grundfos

A brand from Denmark that produces pumping equipment more than 70 years. At her circulation devices good feedback consumers. They are also valued around the world for their optimal price-quality ratio. Currently, models are manufactured not only in Denmark, but also in Serbia, Germany, and China. They are silent, economical, and available in a wide range. Some have a display with digital indicator, where energy consumption and power are displayed.

Other advantages of the Grundfos pump for underfloor heating:

overheat protection;
summer mode – protects against jamming in case of prolonged inactivity;
three speeds;
proportional and constant pressure modes;
AUTO ADAPT function – provides automatic operation, determining what the heating system needs at a given time.

You can control all indicators using a special smartphone application.

Wilo

Wilo brand underfloor heating pumps are valued for their high energy efficiency and durability. The brand has existed for about a century, supplying high-quality pumping equipment for heating systems.

Advantages:

protection of the housing from corrosion and thermal insulation;
engine overheat protection;
wide the lineup– there are “wet” and “dry” type devices;
minimum power consumption – about 3 W;
ease of maintenance;
low noise level.

One of the disadvantages of the brand is the relatively high cost, but such pumps for heated floors pay for themselves within a year, because they can be adjusted by decreasing and increasing the speed and, accordingly, power, depending on the air temperature outside the window.

DAB

An Italian brand that also produces high-quality circulation pumps for heated floors. These are “wet type” models, which are often chosen for cottages and country houses.

Advantages:

protection against moisture ingress;
efficiency - most brand models consume 78 Watts, the new Evosta – 35 Watts;
housing with a heat-insulating casing;
air release function.

Designed for a maximum operating pressure of 10 bar.

Oasis

The pump is suitable for installation in underfloor heating systems of apartments and houses. Manufactured by the Chinese brand Forte. It is characterized by a long service life, thanks to a body made of cast iron or duralumin, and compact dimensions.

The models have 3 speed modes, but it is recommended to use them with clean water that is not heavily contaminated with impurities (for comparison: some Wilo devices can operate even in an aggressive environment).

At the same time, many buyers call pumps Oasis the best option for budget underfloor heating systems, since they are cheaper than their European counterparts.

Lowara

An Italian brand that has been producing pumps for more than 40 years. Its devices are characterized by high performance and long service life.

Advantages:

protection against ferrite and deposits - they are attracted by magnetic parts;
durable cast iron or bronze body;
parts made of stainless steel - the pump rotor assembly for heated floors is made from it;
protection against high temperature and overload;
automatic air release.

Other good pumps for underfloor heating circuit – Krakow, Sprut, Gross.

Warm floors are effective means heating a private house or apartment. An important condition for the operability of the system is the presence of circulation equipment capable of creating the necessary pressure in the water circuit. The Grundfos pump for underfloor heating has a high throughput and is designed for connection to any type of boiler.

Scope of application of Grundfos pumps for water floors

The Grundfos underfloor heating pump can be used with equal efficiency when connected to traditional radiator heating systems. The Alfa series models that use an electronic control unit deserve the most attention. Grundfos pumps of this series adapt to the current need for thermal energy.

In addition to pumping equipment, the company produces everything necessary for connecting to the water circuit, which ensures quick installation in any type of heating system. Installation takes no more than a few hours.

Installation of Grundfos pumping equipment is limited by the following parameters:

The water temperature in heated floors is from +2°C to +110°C.
Vertical arrangement of the electric pump.
The maximum pressure in the system is no more than 10 bar.
Purified water or glycol containing mixtures are used as a coolant, with a maximum ratio of no more than 30%.

When choosing Grundfos circulation pumps for heated floors, you will need to pay attention to the throughput and performance of the module. To select according to parameters, you can use the services of special online calculators.

Which Grundfos pumps are best for underfloor heating?

In order to choose the right Grundfos pump for pumping coolant in heated floors, it is necessary to take into account that the manufacturer has produced several models of equipment specifically designed for this purpose. It is worth paying attention to the following modifications:

Circulation pumps Grundfos UPS for water floor heating - are popular due to their low cost and good technical specifications. The disadvantages include a mechanical change in the speed of the pump, lack of adaptation, depending on the actual consumption of thermal energy. For rooms with an area of no more than 100 m², the optimal solution would be to purchase a model from the series.
Electric circulation pumps with an electronic control unit for the underfloor heating system, with frequency control of pressure in the water circuit. The regulator automatically adjusts the operation of the pumping equipment, changing the circulation intensity. As a result, power consumption drops almost by half, module efficiency increases and ease of use is ensured.

Depending on the chosen model, the cost of a Grundfos pump varies from 8 to 80 thousand rubles. The price is affected by performance, throughput, and type of control unit. The classification of pumps for underfloor heating includes the UPS series (UPSD, UPE, UPS Series 100 and 200) and Alfa, Alfa2, Magna.

How to properly connect a Grundfos pump to a heated floor system

The Grundfos module is mounted in a manifold for underfloor heating using special pipes. For convenience, the connectors are engraved with arrows indicating the installation direction. The first start of the module is performed only after the system is filled with coolant. Connection to the electrical network is made through the terminal box. The housing is installed strictly in a vertical position.

Grundfos pumping equipment is the optimal solution for multi-circuit heating systems. Technical parameters allow connection to solid fuel, liquid fuel and gas equipment.

Grundfos products are well known – they are in first place in the pump market. Many people choose the brand of this manufacturer because the name of the company is well-known - and this is synonymous with quality and durability.

Grundfos pumps last for decades without requiring replacement.

Grundfos benefits

Low energy consumption
High performance
No noise (except for models with dry rotor)
Built-in relay
Increased service life (ceramic bearings, stainless steel).
Wide range of applications (DHW, heating, air conditioning)
Possibility to choose a model of any complexity (simple three-stage options, electronically controlled devices, with remote adjustment)
Auto-adaptation system for complex systems that respond to changing weather conditions.

The purpose of the circulation pump is to ensure a constant speed of fluid movement and its pressure in the pipeline. This happens by overcoming water resistance at all turns of the pipeline.

Performing this task by the device solves the problem of uniform heating of the pipeline along its entire length, including remote parts. By installing a Grundfos pump, you can forget about the problem for many years.

How to choose a pump

Grundfos products are represented by many models, with a wide range of capacities and functionality.

More often, circulation pumps are purchased on the recommendation of a consultant, but with independent determination the desired model should be based on the following indicators:

The Danish concern produces several series that cover all possible requests for power and functionality:

U.P.

Pumps for automatic systems, single-speed, with thermostat and relay.

UPS,UPSD

Devices are purchased for radiator heating systems, heated floors, hot water supply and refrigerant circulation. The engines are designed for three speeds. UPSD – dual devices.

ALPHA

Compact devices that consume little energy (class “A”). Some models are equipped with an automatic adaptation system - the pump adjusts the operation of the system so that energy consumption is significantly reduced.

The other part of the series is designated by the letter “L”; these are models without auto-adaptation.

All models of Grundfos circulation pumps are suitable for hot water supply, radiators and heated floors.