The best thing to add to the system: Wilo heating circulation pumps

Inexpensive and reliable device in order to increase the efficiency of the heating system - Wilo circulation pump.

The Wilo brand needs no advertising. Industrial and domestic pumps with various functionality are used all over the world.

Wilo heating circulation pump

The company exists one and a half centuriesDuring this time, its name has become a symbol of quality and reliability. Since 2008, the name Wilo SE has been approved.

If you need to complete a heating system, then the Wilo pump will be the optimal choice.

Technical specifications

• performance 2.2-6 cubic meters per hour;
• the power depends on the set frequency and is within the range 39-176 W;
• rotation frequency 0.1-4.8 thousand rpm.;
• pumps cold water with a temperature below zero (up to -10°С);
• pumps hot water up to 110°С;
• weight - 2-8 kg.

Installing a pump will extend the life of the heating boiler and will use fuel or electricity economically.

Advantages of Wilo products

The device is designed for comfortable use:

• reliability, simple design, compactness;
• cataphoretic coating protects against rust;

• made made of high-quality materials;
• manual speed control pumping;
• engine does not react to blocking currents and does not require a relay;
• dry running protection;
• tolerates hot environments up to 40°C, is installed in boiler rooms;
• possible self-assembly.

Judging by the reviews of product users, there are no disadvantages.

Wilo pumps are suitable for buyers with any income level. The cost of a simple device starts from 2500-3000 rubles, powerful models for multi-storey buildings can be purchased for 150-230 thousand rubles.

Components of the device

The circulation pump consists of several elements:

• frame;
• working chamber;
• engine;
• rotor;
• impeller;
• automation.

Wilo motors are available in a wide range for any system configuration. There are products with powerful motors that create excellent pressure.

Types of pumping devices

They highlight two main varieties circulation pumps for heating systems.

With dry rotor

Devices of this type are distinguished by their increased power.

The main parts of the pump do not come into contact with the pumped medium., because they are located in a sealed chamber.

Photo 1. Circulation pump from the manufacturer Wilo with a dry rotor. At the back there is a fan for cooling the parts of the device.

Such a device is capable of creating a pressure column up to 15 meters, however dry rotor means some problems:

• regular maintenance required;
• there is noise when the engine is running;
• Dry running means periodic wear and tear that will require action.

If there is a breakdown, you will have to replace the parts., which are made from expensive materials and have a significant cost.

With wet rotor

This variety is distinguished by its greater unpretentiousness and does not require attention from the owner.

They do not require maintenance because The device does not require cleaning or lubrication. The role of a lubricant is performed by a heat carrier that comes into contact with the moving parts of the equipment.

Due to this The pump is silent, does not wear out and consumes little energy.

Photo 2. Circulation pump from the manufacturer Wilo with a wet rotor. It is less demanding than the dry type of the device.

Choosing a Grundfos pump

Before purchasing a device, consumers are primarily guided by the cost. Wilo prices are rightly considered low, but Other manufacturers have inexpensive pumps.

For example, Grundfos. The cheapest model, which is comparable to Wilo prices — Grundfos UPS 25-40 180 (price about 5 thousand rubles). The device creates a pressure column up to 4 meters, pumps liquid at a speed 3.5 cubic meters per hour. Acceptable temperature — from 2 to 120°C.

Grundfos UPS is the most popular line of models, has the following features:

• gear shifting;
• silent operation;
• wet rotor;
• Possibility of installation in heating and air conditioning systems.

The more expensive options have the best technical characteristics. Model of this series 25—80 N 180 creates a pillar up to 9 meters, the price is the same 5 times higher.

For the right and economical choice You should carefully study the specifications of each specific model.

If the pump is selected for domestic use, then most often this means a single-phase power supply (the number 100 in the name). If the network is three-phase, then the appropriate device is marked the number 200.

Design features are also significant. Some models have additional rotor protection. ("anti-jamming"), which reduces the risk of failure.

Features of the models

The manufacturer Wilo has several popular models of circulation pumps.

Wilo RS 25 6

The manufacturer's model that creates the pressure column 6 meters.

Advantages:

• wet rotor, adjustable speed;
• the engine does not respond to blocking currents, no need for a relay;
• coolant with a temperature in the range (from -10°C to 110°C);
• a filter is installed in front of the cartridge, which increases the reliability of the pump;
• operates with full functionality at ambient temperatures up to 40°C;
• easy installation;
• takes up little space (installation length - 180 mm).

Wilo Star RS Series

A range of compact, reliable pumps for domestic use.

The letters in the name indicate the characteristics of the product:

• RS — type, rotor, fittings;
• Next come the numbers indicating the connection diameter, pressure, and branch pipe diameter.

The pump is capable of providing constant pressure in the heating system, but It is important to choose the right option, taking into account the following factors:

• pressure column in meters;
• pump capacity (the amount of water it can pump per unit of time).

Photo 3. Wilo Star RS circulation pump. The device is a wet rotor device.

These values ​​are provided by the manufacturer., which tests the device under conditions as close to real ones as possible. The pump documentation contains graphs reflecting the pump's pressure and flow capabilities.

Main characteristics:

• pressure column;
• power (depending on frequency);
• the pressure in the system reaches 10 bar.

Designed for pumping clean water only, glycol may be added in a ratio of 1:1.

Peculiarities:

1. The engine does not require additional devices, resistant to blocking currents, does not react to voltage surges.
2. The rotation frequency is switched, for this purpose there is a toggle switch with markings of different sizes on the terminal box. This helps to achieve the optimal temperature in the house and helps to save electricity.
3. To remove air from the system, which causes the device to run idle, a special screw is used.

Using the frequency change function makes it possible to reduce energy consumption. up to 50%If the temperature has dropped, the frequency will have to be increased. If noise occurs at too high a frequency, then lowering the frequency will help reduce it.

These universal devices are used:

• for pumping cold and hot water;
• in cooling and air conditioning circuits;
• in homes and businesses.

The pump is easy to install:

• installation is allowed on any section of the circuit;
• horizontal or vertical installation (restrictions are specified in the technical data sheet);
• the terminal box can be installed in 4 positions;
• Possibility of double-sided cable connection;
• For ease of installation, spring terminals are provided.

The product is made of high-quality materials:

• high-strength grey cast iron alloy (some models are made of bronze);
• polypropylene (for the impeller);
• stainless steel (for shaft);
• metallographite (bearings).

Among the advantages, the first positions are occupied by inspiring price and low energy consumption.

Connecting the device

Efficient heating and uniform heat distribution throughout the rooms is ensured by a properly selected circulation pumpIt is important to install it correctly, a lot also depends on it.

Self-installation does not require professional knowledge, but There are several important points.

Connection point

It can be installed on any section of the contour, but professionals recommend choosing return pipe.

Photo 4. Heating system diagram. The circulation pump is installed on the return circuit.

Installation in the heating system

The water is shut off, The pipes are cut according to the installation length of the product. Before installation, check in what position, horizontal or vertical, the pump should operate. Then seal and tighten the connection points. Consider the connection to the electrical network in advance.

Filters

It is recommended to install additional coarse filters., this will protect the device from accidental exposure to particles and significantly reduce the likelihood of failure.

Separate pocket

Sometimes for ease of maintenance and repair of the pump the installation is carried out in a separate pocket. For this purpose, an additional branch of length is created. from half a meter. Valves are installed at the ends, which allow the device to be disconnected from the general circuit at the right moment. In this case, there is no need to disconnect the system - the valves are closed, the pump is removed from its place and sent for repair, and the structure continues to work.

Photo 5. Special pocket for the circulation pump. Valves are located on the edges of the structure.

Maintenance and repair

The units are so simple that you can carry out maintenance work yourself.

The shaft does not rotate

Due to the low noise level, it is not immediately apparent that the pump has stopped working properly. This fault is detected using a special shaft rotation tester. If the scale shows no rotation, the device is immediately disconnected from the network.

Sometimes this happens due to prolonged inactivity or a foreign object entering the chamber. In both cases, the pump will have to be disassembled. The shaft must be unscrewed (there are notches on it for this purpose) and the particles removed. In some models, you will have to pull out the engine and unscrew the shaft, then assemble the pump and test it.

A creaking sound appears

This is possible when the system heats up.

The cause of the creaking sound is the contact between the engine pulley and the drain plug.

It is eliminated by installing a gasket on the plug. If this does not help, a part of the pulley is carefully sawed off, no more than 3 mm.

The part that comes into contact with the bushing is cut off.

It's stalling

To fix this problem You will have to disassemble the pump and clean the scale using a brush. To prevent this, a coarse filter is installed for a long time.

The pump vibrates

This problem is solved by replacing the bearings., new ones are driven into place with a mallet or wooden hammer.

Noise and vibration also occur due to a drop in pressure in the system. Accordingly, the pressure level at the input increases. It is effective to reduce the viscosity of the liquid.

Low water pressure

First of all, check that the connection is correct (if the network is three-phase). If this is not the problem, then you will have to check everything:

• degree of filter contamination;
• the amount of glycol in the coolant (if it is higher than the norm, the liquid will be too viscous);
• the condition of the pipes in the circuit.

Having identified the problem, it is necessary to bring the violated parameters in accordance with the manufacturer's recommendations.

Useful video

Watch the video which explains how to install a Wilo circulation pump in a heating system.

Pump operation with optimum efficiency

The circulation pump is always durable, but its service life will be record long, if you follow all the manufacturer's recommendations for installation and operation.

The following information must be provided:

• contour length;
• heating area;
• boiler parameters.