Circulation pump grundfos alpha 2. Overview of pumps Grundfos Alpha2 series. Selection of the pump for the maximum head

Pumps GRUNDFOS ALPHA2 are used to circulate water or glycol-containing liquids in controlled heating systems and in heating systems with variable flow rates. In addition, the pumps can be used for circulation in hot water supply systems.

In addition to exceptional reliability, the pump has a wide range of functionalities: three fixed speeds, three modes for maintaining a constant differential pressure, three modes for proportional differential pressure control, as well as the patented AUTOADAPT function for operation in a circuit with radiators and an automatic transition to night mode.

In AUTOADAPT control mode, ALPHA2 analyzes the load on the heating system and optimizes its operation to strike a balance between maximum comfort and minimum energy consumption.

The updated ALPHA2 received the function of hydraulic balancing of the heating system with the Grundfos GO Balance mobile app.

Features and Benefits

A frequency converter built into the pump automatically adjusts the rotation speed depending on the actual demand of the system;

The AUTOADAPT control mode analyzes the load on the heating system and optimizes pump performance. As a result, the pump strikes a balance between maximum comfort and minimum energy consumption.

The new ALPHA2 are equipped with a heating system balancing function. Pump, interacting with the user through mobile app Grundfos GO Balance analyzes the hydraulic characteristics of the heating system and provides recommendations for setting the shut-off and control valves. (requires communication module ALPHA Reader);

Energy efficient permanent magnet motor;

For hot water supply systems, a version with a stainless steel casing is available (execution code - N);

The indicator on the control panel shows the current power consumption or the current consumption;

Night mode function;

Summer mode function;

Reliable start function;

Built-in protection against dry running;

Built-in thermal protection;

Easy connection to the mains supply thanks to the special ALPHA plug;

For models ALPHA2 25-XX, threaded connections are supplied as a set.

Advantages of hydraulic balancing of heating systems and underfloor heating systems using the Grundfos ALPHA2 solution

Reducing fuel costs up to 20%;
Saving 3 600 rubles. / year on fuel for the house 200m 2 *;
The payback period for additional costs is 2 years *;
Reducing the cost of heating system equipment up to 10%;
Elimination of water noise in the thermal heads of radiators;
Simple and fast process of computer balancing of the system with a professional result;
Detailed report on the results of balancing in in electronic format ready to print.

Heating systems installed on the basis of natural water circulation have a rather significant drawback - a weak circulating head. This problem is most pronounced in multi-apartment buildings. One solution to overcome this disadvantage is to increase the diameter of the pipes. But this is a road to nowhere, as it leads to an increase in metal consumption, difficulties in laying pipes. That is, this solution is completely irrelevant for modern high-rise buildings.

Firm Grundfos offers its own way to bring the heating system to optimal operating condition - the installation of circulation pumps. Among the wide variable line of models of circulation pumps of the company Grundfos several models stand out. Consider them characteristics, advantages and conditions of use.

Circulation pump Grundfos Alpha2 - the first pump with the system AUTOADAPT, designed to automatically select the optimal settings for the operation of the equipment, depending on the conditions existing in a particular heating system at a certain time. In addition, all pumps of this lineup possess high energy efficiency... The use of pumps type and in comparison with similar models will bring the user a significant savings up to 400 kW per year.

The design characteristics of the Alpha2 and:

Body material - cast iron or steel;

System "Wet rotor"- the pump motor, being in a sealed stainless steel sleeve, is located directly in the coolant and has the ability to automatically cool down, while the bearings are regularly lubricated;

Added to the electric motor permanent magnets and a frequency converter;

System AUTOADAPT provides automation of pump settings adjustment;

Shaft and bearings are made of ceramics, thereby significantly increasing their service life.

Pumps Grundfos Alpha2 favorably differ from their "brother" following design features :

- the presence of an indicator of the consumed energy;

- the ability to regulate the pressure level at night;

- presence of a malfunction indicator;

Pump Specifications:

System working pressure - up to 10 bar;

Heat carrier temperature - up to + 110 ° С;

Supply (consumption) - up to 3 m3 / h;

Grundfos Alpha2 pump control panel:
1 - indicator of actual energy consumption
pump (in W);
2 - light fields displaying pump settings;
3 - "night mode" status indicator;
4 - button for switching on "night mode";
5 - button for selecting pump settings - pump power - up to 45 W;

Application of pumps Grundfos Alpha2 and Alpha2 L:

Circulating pumps Alpha2 and Alpha2 L due to their design and functional features, they can be easily built into one - and two-pipe heating systems.

If the pumps Alpha2 and Alpha2 L reinforced with additional protection in the form of a stainless steel case, then it will be possible to use them during installation "Warm" floor.

When installed in hot water systems, pumps manufactured by Grundfos have an additional option in the form thermostat and autosensor- a timer that allows the equipment to be turned on in operating mode only when loaded.

When assembling air conditioning systems, circulation pumps are used Grundfos standard equipment.

Advantages of Grundfos Alpha2 and Alpha2 L circulation pumps:

- high energy efficiency (class A)- energy consumption is 4/5 less than that of class pumps D... Also, the energy efficiency coefficient ( EEI ) pumps Alpha2 is 0.15, which is the best indicator in its class;

- efficiency of equipment;

- the ability to control processes with one button;

- the ability to manually adjust the speed of revolutions;

- low level of noise production;

- the ability to use in rooms of any volume due to its small size.

- long service life- pump warranty Grundfos Alpha2 and Alpha2 L is 5 years old!

GRUNDFOS ALPHA2 pumps are used to circulate water or glycol-containing liquids in controlled heating systems and in heating systems with variable flow rates. In addition, the pumps can be used for circulation in hot water supply systems.

In addition to exceptional reliability, the pump has a wide range of functionalities: three fixed speeds, three modes for maintaining a constant differential pressure, three modes for proportional differential pressure control, as well as the patented AUTO function. ADAPT for work in a circuit with radiators and the function of automatic transition to night mode.

In AUTO control mode ADAPT ALPHA2 analyzes the load on the heating system and optimizes its operation to strike a balance between maximum comfort and minimum energy consumption.

The updated ALPHA2 received the function of hydraulic balancing of the heating system with the Grundfos GO Balance mobile app.

A frequency converter built into the pump automatically adjusts the rotation speed depending on the actual demand of the system;
AUTO control mode ADAPT analyzes the load on the heating system and optimizes pump performance. As a result, the pump strikes a balance between maximum comfort and minimum energy consumption.
The new ALPHA2 are equipped with a heating system balancing function. The pump, interacting with the user through the Grundfos GO Balance mobile app, analyzes the hydraulic characteristics of the heating system and provides recommendations for setting the shut-off and control valves. (requires communication module ALPHA Reader);
Energy efficient permanent magnet motor;
For hot water supply systems, a version with a stainless steel casing is available (execution code - N);
The indicator on the control panel shows the current power consumption or the current consumption;
Easy connection to the mains supply thanks to the special ALPHA plug;
For models ALPHA2 25-XX, threaded connections are supplied as a set.

Advantages of hydraulic balancing of heating systems and underfloor heating systems using the Grundfos ALPHA2 solution:

Reducing fuel costs up to 20%;
Saving 3 600 rubles. / year on fuel for a house 200m2 *;
The payback period for additional costs is 2 years *;
Reducing the cost of heating system equipment up to 10%;
Elimination of water noise in the thermal heads of radiators;
Simple and fast process of computer balancing of the system with a professional result;
Detailed report on balancing results in electronic form, ready for printing.

Pump type	Product number	recommended price
ALPHA2 25-40 *	98520745	RUB 11,100
ALPHA2 25-60 *	98520749	RUB 12 600
ALPHA2 25-80 *	98649772	RUB 16,200
ALPHA2 32-40	98520750	RUB 12,500
ALPHA2 32-60	98520754	RUB 13 800
ALPHA2 32-80	98914896	RUB 17 800
* - connecting nuts included Reduced assembly length (130mm):
ALPHA2 25 - 80 130	98649753	16 400 rub.
Stainless steel housing:
ALPHA2 25-40 N	97993209	RUB 21,100
ALPHA2 25-60 N	97993211	RUB 24,400
ALPHA2 25-80 N	98676783	RUB 28,300
ALPHA2 32-60 N	98676784	RUB 30,300

Just like ONE, TWO, THREE ...

How to quickly balance the heating system

Grundfos GO Balance app

Perform hydraulic balancing quickly, easily and with guaranteed results! The toolbox - ALPHA3 pump, ALPHA Reader and the free Grundfos GO Balance app - gives you a fresh look at balancing heating systems.

Download here:

Connecting a new Alpha plug

Air removal

To remove air from the pump at the moment of its commissioning, it is necessary to set the mode of high (III) fixed rotation speed 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 any problems even after a long idle period of several months

If summer mode has not been activated prior to summer season, limescale deposits can potentially block the pump. ALPHA 3 begins to vibrate during start-up, trying to spin the rotor with an increased starting torque of up to 27 N * m, thereby destroying any dirt deposits.

Summer mode function

The function protects the pump and the heating system as a whole from "acidification"

In heating systems that have not been in operation for several months, lime deposits are often formed, which can potentially prevent the normal start of the pump and the system before preparing for the heating season. The summer mode function, which is activated just before the start of the summer season, protects the pump rotor and the heating system as a whole from acidification. Once a day, the pump will start and run at minimum speed for two minutes, which is quite enough to protect the rotor and the system. At the same time, electricity consumption is reduced to almost an absolute minimum.

Dry run protection

Built-in dry-running protection algorithm gives the ALPHA3 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 dry running: fluid leakage in the system, air "lock", or closed valves in front of the pump. Thanks to the dry running protection, the life cycle of the ALPHA3 is significantly extended.

Cataphoretic coating of the hydraulic part

A special coating of the hydraulic part of the ALPHA2 pump serves to effectively combat metal corrosion both from the inside - in the case of using poorly treated water as a heat carrier; and outside - in the case of using the pump in air conditioning systems, when condensation forms on the pump casing due to low temperatures of the coolant on the pump casing.

Also, the cataphoresis coating improves the hydraulic efficiency of the ALPHA2 pump.

Heat insulating casing

Now heat losses through the pump casing 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 casing tend to zero.

Modes of operation

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 collector wiring underfloor heating contours (see figure)

Proportional differential pressure control mode

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

Fixed frequency baptism mode

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

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

NIGHT MODE

The ALPHA2 automatically switches to night mode when a temperature drop in the discharge pipe is detected by more than 10-15 ° C for approximately 2 hours. The temperature drop rate should 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 approx. 10 ° C.

IMPORTANT: the pump must be installed in the flow line!

AUTO ADAPT

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

SPEED IS ADJUSTED IN ACCORDANCE WITH CHANGING CONDITIONS

The degree of heating in any room depends on several factors. This includes ambient temperature, amount of sunlight, general activity, and other sources of heat.

The variable frequency pump automatically adjusts the power output to meet changing requirements, allowing it to match the thermostat setting and use the minimum amount of energy.

Notice how the pump will automatically reduce speed in each case. This helps to save energy.

CONNECT IT AND LEAVE h>

At Grundfos, we believe that complex can be made simple and innovative technology intuitive.

AUTO function ADAPT reflects this philosophy. It extends the benefits of electronic pump control and even makes it easier to install. A pump with the AUTOadapt function constantly analyzes the system in which it is installed, and as the heating medium 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-checking by the pump of its compliance with the system;
Achieve ideal comfort with minimal energy consumption.

NEW ADVANTAGES

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. Setting AUTO ADAPT is the ideal choice for over 80% of systems.

Second generation AUTO function ADAPT for ALPHA2 it has two significant improvements:

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

ELECTRONIC CONTROL

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

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

Avoiding constant operation 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 RESPONDS TO CHANGES IN CONDITIONS

The heating demand of different rooms is based on several factors. These include outside temperature, sunlight levels, use of electrical appliances, and other sources of heat.

The frequency controlled pump automatically adjusts the capacity according to changing needs. This allows the thermostat to be matched to the settings while using the least amount of energy.

STANDARD PUMP - UNJUSTIFIED COSTS

A standard three-speed pump runs at a fixed speed all the time, regardless of the actual heating demand. This constitutes an unjustified action such as driving a car without releasing the accelerator pedal.

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

E-PUMP IS MUCH MORE EFFICIENT

The smart E-pump from Grundfos does not overpressure. Continuing the comparison with a car, the E-pump slows down to slow down, and this happens whenever it can slow down on its own, without additional effort.

Result? Significant reduction in energy consumption. Pumps with electronic control and low EEI value, provide 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 the reputation, quality and reliability of Grundfos, this means savings for years to come.

HOW IT WORKS?

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

FACTORY SETTINGS

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

The pump starts analyzing the heating circuit from the set operating point. If the current operating point deviates from the set point in time, the pump automatically adjusts the appropriate capacity.

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

NEW SETTINGS

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

INSTALLERS AND CONSUMERS

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

With ALPHA2, the installer after completing the installation and selecting the AUTO function ADAPT, can go away, confident that the pump adapts to the system and automatically selects the optimal settings.

Circulation pump ALPHA2 L Is a reliable and highly efficient A-class pump designed to circulate water in heating systems, local hot water supply systems, and air conditioning systems.

The ALPHA2 L series pumps have three fixed speed modes, two constant pressure modes and two proportional pressure modes to meet the requirements of any heating system.

The scope of delivery includes: pump, ALPHA plug, rubber seals, assembly instructions. ALPHA2 L 25-xx models are additionally equipped with threaded connections.

Pumps of the ALPHA2 L series are included in the GRUNDFOS 24-hour service premium program. 5-year warranty.

Appointment

The ALPHA series pumps are designed to circulate water in heating systems, local hot water supply systems (version “N”), as well as in air conditioning and cooling systems. ALPHA pumps are designed to handle liquids within a temperature range of + 2 ° C to +110 ° C.

Features and Benefits

High energy efficiency, EEI coefficient< 0,23;
Control of all 7 modes with one key: 3 fixed speeds, 2 constant pressure modes, 2 proportional pressure modes;
Permanent magnet motor;
Built-in thermal protection;
Instant network connection with ALPHA plug;
Compact design;
5-year warranty;
Premium "Service in 24 hours" from GRUNDFOS.

Specifications

Note

This version of the pump is discontinued

are used to circulate water or glycol-containing liquids in controlled
heating systems and heating systems with variable flow.

New version of the pump ALPHA2 NEW 25-40 180 (link)

new ALPHA2 NEW are equipped with heating system balancing function

Function AUTO adapt ALPHA2 regulates the differential pressure according to the current needs of the system, there is no need to adjust the pump yourself, it will do everything for you.
There are also 3 fixed speeds, 3 constant pressure modes, 3 proportional pressure modes.

- the frequency converter automatically adjusts the rotation speed depending on the needs of the system

The GRUNDFOS ALPHA2 25-40 pump is suitable for:

Systems with constant or variable flow, in which it is necessary to optimize the pump duty point;
Systems with variable temperature in the pressure pipeline;
Systems in which a decrease in performance is required during the night.

Specifications Grundfos ALPHA2 25-40:

Advantages: One-key control; compact design; the lowest energy efficiency index (EEI = 0.15) - the most economical circulation pump in the world; permanent magnet motor; the frequency converter automatically adjusts the rotation speed depending on the needs of the system; control panel indicator shows the current power consumption and current consumption; night mode function; the electric motor has built-in thermal protection; connects easily and quickly thanks to the special ALPHA plug;
The package includes: pump, heat-insulating jacket, Alpha plug, rubber seals, installation instructions.

Operating modes Grundfos ALPHA2 25-40 :

- Constant differential pressure maintenance 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 striking example of such systems is the collector wiring of the underfloor heating circuits (see figure)

- Proportional differential pressure control mode

- Fixed frequency baptism mode

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 in the discharge pipe is detected by more than 10-15 ° C for approximately 2 hours. The temperature drop rate should 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 approx. 10 ° C.

To ensure optimal use of the night mode function, the following conditions must be met:

The pump must be integrated into the flow line. The automatic night setback function does not work if the pump is installed in the return pipe of the heating system.
The system (boiler) must include devices for automatic control of the temperature of the working environment.

- AUTO mode ADAPT

WHAT IS AUTO ADAPT ?

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

Improving the function of regulating the speed of rotation of the engine;
Self-checking by the pump of its compliance with the system;
Achieve ideal comfort with minimal energy consumption.

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

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

FACTORY SETTINGS

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

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

A pump with the AUTOadapt function constantly analyzes the system in which it is installed, and as the heating medium flow rate changes, it adapts to it.

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

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

- Summer mode function

The function protects the pump and the heating system as a whole from "acidification"

In heating systems that have not been in operation for several months, lime deposits are often formed, which can potentially prevent the normal start of the pump and the system before preparing for the heating season. The summer mode function, which is activated just before the start of the summer season, protects the pump rotor and the heating system as a whole from acidification. Once a day, the pump will start and run at minimum speed within two minutes, which is sufficient to protect the rotor and the system. At the same time, electricity consumption is reduced to almost an absolute minimum.

- Cataphoretic coating of the hydraulic part

Also, the cataphoresis coating improves the hydraulic efficiency of the ALPHA2 pump.

- Heat insulating casing

We offer you to buy the Grundfos ALPHA2 25-40 Circulation pump at a bargain price of 10 792 rubles.

The Grundfos ALPHA2 25-40 circulation pump differs high quality and the best price. The manufacturer is known all over the world and provides a guarantee for its products.

To buy a Grundfos ALPHA2 25-40 Circulation pump in our online store, you just need to place an order online on the website