DIY dab pump repair

In detail: do-it-yourself dab pump repair from a real master for the site my.housecope.com.

In a forced circulation heating system, the heart is the circulation pump. The presence of heating and its quality depend on its stable operation. The same applies to closed hot water supply systems with a constant flow of water in the pipes between the boiler and the storage tank. During operation, the question inevitably arises of how to carry out maintenance and repair of the circulation pump so that it continues to work stably and trouble-free.

For the normal functioning of the pump, the following measures must be taken:

Correct operation, taking into account all the rules established by the manufacturer of the pumping equipment.
Prevention and maintenance of the pump.
Diagnostics and repair in case of pump failure.

The more accurately the operating rules are followed and the more regular pump maintenance is performed, the less often you will have to think about repairing or replacing it.

A number of simple requirements apply to any circulation pump:

Do not allow the pump to idle in the absence of water. Applies to both wet and dry pump.
The pump must not be allowed to operate with a stopped flow of water, for example, if a valve is closed in front of or after the pump.
It is necessary to determine the optimal mode of operation, taking into account the maximum and minimum capacity of the equipment.
It is important to comply with the manufacturer's requirements for the nominal water pressure in the system.
The coolant temperature should not exceed 65 ° C. Therefore, the circulation pump is installed on the return line in front of the boiler, where the already cooled water flows. When a predetermined threshold is exceeded, the process of deposition of hardness salts on the inner surfaces of the pump is accelerated many times over.
Prolonged downtime should not be allowed. About once a month or two, it is advisable to turn on the pump for 15 minutes. If this is not done, then during the oxidation process, the risk of shaft seizure increases.
It is unacceptable to use a circulation pump for pumping dirty water with the inclusion of dense particles in suspension. A coarse filter must be installed, or the purity of the water or heat carrier is monitored in other ways.

Video (click to play).

In operating mode, the pump should have a uniform sound of the operating drive and a constant value of the head at the outlet, which is controlled by the installed pressure gauge. With good handling, even the simplest circulation pump can operate for up to 5 years until its main elements wear out.

Almost all circulation pumps are of centrifugal type. They have an impeller fixed on the motor shaft and placed in a special “shell” chamber. The entrance to the shell is located in the center, while the exit is the outer edge of the shell with a channel extending along the circumference in the direction of motion of the impeller. The engine spins the impeller, and the water, under the influence of centripetal force, rushes from the center to the edges of the sink from inlet to outlet.

Structural elements of the pump:

pumping part, sink and impeller fixed on the shaft;
electric motor;
electronic control unit.

The most susceptible to wear is the moving part of the pump - the motor shaft and impeller, as well as the bearings on which they are attached.

Long service life and trouble-free operation are possible only if proper operating conditions are observed and the pump is regularly prevented. Service refers to the periodic inspection and cleaning of the pump.Inspection for deviations in work should be carried out at least once a quarter, that is, twice during the heating season. It is advisable to clean it every two to three years, depending on the quality of the water and the conditions in which the pump operates.

During the entire period of operation, it is advisable to periodically check the operation of the pump:

The connections are checked for leaks. If detected, gaskets and seals (tow, FUM-tape, etc.) are replaced.
The presence and condition of grounding is visually checked.
The sound of a running engine should not be accompanied by clanks or bumps, extraneous sounds.
The engine should not vibrate too much.
The pressure in the line is checked and its compliance with the nominal one.
The housing must be clean and dry. If this is not the case, then external cleaning should be carried out, the electronic unit should be checked for flooding and the reason why the pump was wet should be eliminated.

It is advisable to clean the pump, including all its elements, about once every two to three years. This only applies to disassembled models. There are pumps with a pressed-in or one-piece, welded casing, which does not involve repair or disassembly. Such units fail and are then replaced with a new assembly. It is advisable to entrust this work to the service center. However, if you have the skills and the tool, you can do everything yourself.

Before disassembling the pump, water is drained from the system or a separate section in which the pump is involved is drained, dismantle it and then proceed to disassembly.

With a hex wrench or a Phillips screwdriver, 4-6 bolts are unscrewed around the perimeter of the engine housing at the junction with the pump shell.
Remove the shell, while the impeller will remain on the rotor shaft with the motor.
Locate four drainage holes around the perimeter. Using a narrow slotted screwdriver, pry up the jacket of the engine compartment under the impeller little by little around the perimeter. As a result, the shaft with the rotor and the impeller will come out of the slots and the stator cup. You can help yourself if you unscrew the protective plug on the outside of the pump, insert a screwdriver into the slot on the end of the shaft and knock the shaft out of the support bearing with light blows.

The analysis is now complete. Now it is necessary to clean the surface of the rotor, impeller and the inner surface of the shell from plaque and scale, if any, just without damaging the surface of the parts. It is not permissible to use coarse abrasives. Better to act with a brush with a polymer hard bristle. Cleaning agents containing a mild hydrochloric acid solution may help. In extreme cases, the smallest emery is used - "zero".

For glandless pumps, it is important to check the cleanliness of the bore inside the shaft and the drain holes located in the protective jacket separating the area of the pumping part and the motor. The liquid enters the rotor just through these holes and then returns through the inner channel, if they are clogged, the cooling of the engine suffers.

For pumps with dry rotor waterproofing of the support bearing is important. If a leak is found from the pump block to the stator block, then completely replace all gaskets and seals inside the device.

The condition of the bearings on which the shaft rests is checked. If they are already broken in order, they will need to be replaced, which is extremely difficult to do at home, you will have to contact a service center.

All seals and gaskets inside the pump should be checked for wear and replaced if necessary. Once all the elements are cleaned and checked, the assembly is carried out in the reverse order.

The circulation pump needs cleaning

By the way the pump works, sound, vibration or a change in pressure, outlet pressure, it is necessary to accurately determine the malfunction and eliminate the cause.

The circulation pump is often used in individual heating systems in private houses. This equipment makes it possible to efficiently run the coolant along the circuit, which ensures a stable temperature throughout the room. The quality of heating depends on the operation of the device.

Circulating pumps serve for a long time and are rarely damaged. However, if malfunctions occur, you can repair the device yourself. An important fact is that pumps of different models have the same operating principle, are subject to the same breakdowns, therefore, the methods for their elimination are the same.

In large rooms, the pipes are long and the water circulates in the system slowly, having time to cool down before returning in a closed loop back to the boiler for reheating. To solve this problem, they resort to the help of circulation pumps, which forcibly force the coolant to move faster along the contour.
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To repair the equipment yourself, you should know its device:

Steel body, elongated horizontally. It contains all the elements of the system. The body can also be made of aluminum alloy or stainless steel.
Electric motor and rotor housed in a housing.
Impeller with blades fixed to the rotor. The blades are curved in the opposite direction from the movement of the wheel. This part is made from durable polymers.

When the pump is turned on, water in the circuit is drawn into the inlet by the rotation of the wheel. In the chamber, centrifugal force acts on the water, pressing it against the walls of the chamber and pushing it out. After that, the pressure drops and water is pumped back into the pump.

The device of modern circulation pumps

With such a continuous cycle of operation, the temperature in the heating system is constantly kept at the same level. This saves fuel or energy costs.
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What breakdowns can occur and how to repair the circulation pump with your own hands? Let's figure it out.
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Foreign object in the impeller chamber.
Prolonged downtime of the apparatus led to oxidation of the rotor shaft.
The power supply to the device terminals is interrupted.

In the first case, you can eliminate the malfunctions by carefully removing the device and unscrewing the housing in the impeller area. If there is a foreign object, remove it and turn the shaft by hand. To avoid re-entry of foreign matter, a filter should be installed on the nozzle.

The humming of the pump can also be observed during prolonged downtime and shaft oxidation. It is necessary to thoroughly clean all oxidized areas and lubricate the movable parts of the working unit.

The circulating pump hums even if the power supply fails. First check the voltage with a tester. If the cable is damaged or broken, it should be replaced. If the cable is in order, look at the voltage at the terminals. The infinity icon on the tester indicates a short circuit. A lower voltage means an open winding. In both cases, it is necessary to replace the terminals.
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The pump does not work when there is no mains voltage. The tester checks the voltage, as well as the correct connection of the device to the power supply.

Circulation pump shaft

If there is a fuse in the pump, there is a risk that it will burn out from power surges. If this happens, replace the fuse. It is advisable to install a reliable stabilizer.
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Limescale between the moving parts of the appliance.
Incorrect connection of the pump in the area of the terminals.

The pump can turn on, but also stop immediately if there is scale. Remove limescale and lubricate the joints between stator and rotor.

In the second case, check the tightness of the fuse on the device. It is removed and all clamps are cleaned. All wires must be correctly connected in the terminal box.
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If the pump is noisy, it could indicate the presence of air in the system.It is necessary to bleed the air from the pipes, mount a unit in the upper part of the circuit so that the air is released automatically.

The pump can also make noise due to wear on the impeller bearing... It is required to disassemble the body of the device, and, if necessary, replace the bearing.
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If the activation of the pump is accompanied by vibration and noise, then the reason is insufficient head in a closed circuit. You can solve it by adding water to the pipes or increasing the pressure at the pump inlet.
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With a low pressure or when the pump almost does not pump the coolant, check the direction of rotation of the impeller in the body of the apparatus. If the impeller turns incorrectly, then you made a mistake when connecting the pump to the terminals in phases, if you use a three-phase network.

A decrease in head may result from the high viscosity of the coolant. At the same time, the impeller experiences increased resistance and does not work well, not at full strength. It is necessary to check the mesh filter and clean it. It is also advisable to check the cross-section of the pipes of the holes. After that, you will need to adjust the correct parameters of the pump.
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The pump will not turn on if there is a power problem. It is necessary to check the phases and fuses. If they are in order, then the drive winding has burned out. In this case, you will have to seek help from specialists.

The internal surfaces of the pump must be free of rust

When diagnosing equipment, you can use the indicator - a tester of the rotation of the circulation pump shaft. It allows you to make sure that the pump is working without being connected to the mains.
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The temperature of the pump must be the same as the temperature of the pipes of the heating system. If the circulation pump heats up and its temperature is higher than that of the pipes, then there are errors in installation or a problem with operation. Let's consider why the device is heating up.

If installed incorrectly, the pump starts to overheat immediately after switching on. Installation errors are the easiest to spot.
Clogged loop. Rust and various deposits accumulate in the system. This leads to a narrowing of the diameter of the passage for the coolant. The load on the machine increases and the engine overheats. Preventive maintenance of the system will be required.
Rust, debris, limescale in clogged communications can get into the pump and jam the electric motor, causing it to warm up. Disassemble and clean the device, otherwise the motor coils will quickly fail.
The pump is also heating up due to the lack of lubrication of the bearings. Under these conditions, they wear out much faster, thereby reducing the service life of the entire apparatus. The motor is seized. The pump should be taken to a workshop.
When the mains voltage is below 220 V, the pump overheats and can quickly fail. Determine the voltage in the network as soon as the engine starts to warm up in order to immediately exclude or confirm this problem.

If the circulation pump heats up, you do not need to disassemble it immediately. First, measure the voltage in the network. At normal voltage, the system is washed with caustic soda, leaving it in the pipes for an hour, and then drained. If the pump is still warming up, you will need the help of specialists.
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In order for your pump to serve for a long time and reliably, you should follow the operating rules and carry out regular preventive maintenance. The apparatus should be inspected periodically:

If a leak is detected at the joints, replace the gaskets and seals.
Check the grounding.
Extraneous sounds should not be present when the engine is running.
There should be no strong vibration.
The line pressure is measured.
The pump must be dry and clean.

Every two to three years, the device is cleaned, all of its components. Regarding models that can be disassembled.Pumps with one-piece or pressed-in casing cannot be repaired, and if a breakdown occurs, it is replaced with a new one. How to disassemble a circulation pump yourself?

Testing and repair of the electrical unit of the circulation pump

To do this, you need a hex wrench, a flat screwdriver (slotted) 4 and 8 mm, a Phillips screwdriver.

First, all the water is drained from the system, the pump is dismantled and then they are disassembled.

Using a wrench or a screwdriver, unscrew 4-6 bolts on the body at the point where the pumping part is connected to the shell.
The shell is removed, while the impeller remains on the rotor shaft with the engine.
Drainage holes are found around the perimeter. There should be four of them. With a slotted screwdriver, little by little pry the jacket of the electric motor compartment under the impeller. The shaft with the rotor and the impeller must come out of the grooves and the stator cup.

The disassembly of the unit is now complete. Next, the rotor, impeller, shell are cleaned from scale and plaque without damaging the parts. Do not use coarse abrasives. It is recommended to clean the parts with a hard polymer bristle brush. You can use cleaning agents that contain a weak solution of hydrochloric acid. Sometimes they use fine emery - "zero".

Popular manufacturers of circulation pumps are Webasto, Wilo, Ggrundfos, Dab. Models of these brands are reliable, and damage can occur only if the operating conditions are not followed. If you still have to resort to repairing the circulation pump, then finding and purchasing the corresponding parts on the Internet will not be difficult. A repair kit for the circulating pump u 4814, which is very popular in the modern market, like other models, can be ordered in many online stores.
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DAB pump service centers and workshops

Rostov-on-Don, st. People's Militia, 183 view on the map

DAB Authorized Service Center

Installation, commissioning, service of pumps. Pump repair. Spare parts - selection, ordering, sale. Authorized service center WILO, ESPA, LOWARA, DAB, EMU, VogelPumpen, Seepex, Salmson ...

Additionally: delivery of the pump to / from the service center, on-site repair of the pump at home or in the office, replacement of consumables, installation of the pump (connection, adjustment), sale of spare parts

Phone: +7 (495) 471-59-32, +7 (985) 109-25-54

DAB Authorized Service Center

High-quality repair of pumps for household and professional series. ...

Optional: sale of spare parts

Astrakhan, st. Kuibysheva, 98 to see on the map

DAB Authorized Service Center

St. Petersburg, st. Novolitovskaya, 16 to see on the map

DAB Authorized Service Center

Moscow, st. General Beloborodova 46, building 12, office 33 view on the map

DAB Authorized Service Center

Kazan, st. Pavlik Morozova 17 view on the map

DAB Authorized Service Center

Saint Petersburg, Lyubotinsky prospect, 2-4 see on the map

DAB Authorized Service Center

Kazan, st. Vosstaniya, 100, building 107 to look at the map

Phone: +7 (843) 2125644, 2125655, 2250108

DAB Authorized Service Center

Optional: sale of spare parts

- delivery of the DAB pump for repair by the service center
- field repair of the DAB pump at home or in the office
- service of replacement of consumables
- services for the installation and configuration of equipment
- sale of spare parts for the repair of the DAB pump.

To install or configure the purchased equipment, you can use the services of specialists from authorized organizations (authorized service center) who will carry out all the necessary work for the further operation of the pump. If there is no service center at the indicated address or is located at a different address, please let us know.

DIY circulating pump repair - step by step instructions

DIY circulation pump repair

Circulation pumping devices are very popular with private house owners and summer residents. The range of pumping equipment is quite wide, but the general principles of the device are the same. Such equipment can stop from minor breakdowns. Take a broken pump to a service center? It costs money, and in many regions there are simply no service companies. Therefore, the household owner of the house must know how to repair the circulation pump with his own hands.

To understand how to independently disassemble, maintain, repair a circulation pump, you need to know its structure. Such equipment is arranged as follows:

all units and mechanisms are located in the case, which is made of steel (mainly stainless), aluminum and other alloys;
inside the case is located rotor motor;
a wheel with wings is installed on the rotor - impeller, which is usually made from technical polymers.

Circulation pump device

After turning on the electrical circuit, the engine begins to rotate the rotor with the impeller attached to it. Liquid is supplied to the central part of the pump. The blades rotate and throw water or other coolant to the outside of the housing. Under the action of centrifugal forces, the liquid moves and enters the pump outlet.

Circulation pump in the heating system

There are currently two main types of circulating pumping devices on the market.

"Wet type" - in such equipment, the rotor is completely immersed in the pumped liquid. A significant advantage of this configuration is the cooling of the rubbing and heating parts by contact with the liquid. Such equipment works quieter and costs less. When installing it, it is necessary to maintain the position of the housing specified by the manufacturer (usually horizontal), since the rotor must be completely immersed in the liquid. Also, "wet" devices are easier to maintain, but very sensitive to the lack of fluid in the system (running "dry" can quickly damage the pump).
"Dry type" - in such devices, the pump motor is placed in a separate compartment or module, and the transmission of torque to the rotor is carried out through the drive device (coupling). Dry-type pumps are more efficient, but also have a more complex design. A dry pump can operate without damage and no fluid is present in the system, but doing so will result in increased wear on the drive.

Read also: DIY tcl TV repair

It is necessary to carry out self-repair of circulation pumps only after the expiration of the warranty period or if it is impossible to obtain qualified technical assistance. A number of pump assemblies are quite difficult to find commercially. This is usually caused by the trade policy of the manufacturers, so be prepared for the fact that in some cases it is cheaper to purchase new equipment rather than fix broken ones.

Glandless pump design

To learn more about the technologies for repairing circulation pumps, watch the training video.

Circulation pumps of various types are often used today in country houses and summer cottages, which makes it possible to make the operation of autonomous heating systems more efficient and at the same time save on energy resources. Meanwhile, if such a hydraulic machine fails, the entire heating system ceases to function, which puts its user with a choice: use the services of qualified specialists or repair the heating circulation pump with his own hands.

Dismantling the circulation pump

The reasons for the breakdown of circulation pumps, the types of which differ from each other in certain design features, are associated both with non-compliance with the rules for operating such equipment, and with the quality of the coolant, drops in the power supply network, as well as with a number of other factors. Before deciding on an independent repair of the circulating pump, you should understand well the design and principle of operation of such a device, which will allow you to establish the exact cause of its failure and eliminate it.

Without knowing the device of the circulation pump, you will not only be able to repair such a hydraulic machine, if necessary, but also engage in regular maintenance. The design of circulation pumps is:

a body made of stainless steel or non-ferrous alloys;
an electric motor, the shaft of which is connected to the rotor;
directly the rotor itself, on which the wheel with blades is installed - the impeller (its blades, which are constantly in contact with the pumped medium, can be made of metal or polymer materials).

Circulation pump design

The circulation pump operates, regardless of its design, according to the following principle.

After the electric current is supplied, the shaft of the drive motor begins to rotate the rotor on which the impeller is installed.
The heat-transfer fluid entering the inner part of the pump through the suction branch pipe is thrown by the impeller and centrifugal force to the walls of the working chamber.
The liquid, which is subject to centrifugal force, is pushed into the discharge pipe.

As mentioned above, depending on the design features, the circulation pump for heating can be of different types. So, devices with a rotor are distinguished:

In private houses, the most commonly used circulation pumps are "wet" type

For circulation pumps of the first type, which are used mainly for equipping domestic heating systems, the rotor is constantly in a liquid medium. This not only contributes to the lubrication of the moving parts, but also to their efficient cooling. The main advantages of this type of equipment include:

low noise level during operation, since the water, in which all the moving elements of such a device are located, perfectly absorbs vibrations;
ease of installation (such pumps simply cut into the pipeline), maintenance and repair.

Meanwhile, pumps with a "wet" rotor, if we talk about their shortcomings, are not very efficient, can be installed only in a horizontal position and are very critical of the lack of liquid in the heating system.

Pumps with "dry" rotor are installed in separate boiler rooms and are used in systems that heat large areas

The drive motor of pumps with a "dry" rotor is placed in a separate unit. Rotation from the motor shaft is transmitted to the impeller by means of a special coupling. Unlike devices with a "wet" rotor, pumps of this type are characterized by a higher efficiency (up to 80%), but also by a more complex design, which somewhat complicates the procedures for their maintenance and repair.Circulation pumps with a "dry" rotor are cut into the pipeline and their body is fixed to the wall, for which a special console is used.

In order not to face situations in which the circulation pump installed in the heating system will require repair, it is necessary to strictly follow the rules for operating such equipment, which are as follows.

If there is no water in the pipeline, it is impossible to start the circulation pump.
The value of the generated water pressure must be within the characteristics specified in the technical passport of the circulation pump. If the device produces a reduced or, conversely, increased water pressure, this can lead to its rapid wear and, accordingly, failure.
During the period in which the heating system is not used, the pump must be turned on for circulation at least once a month for a quarter of an hour, which will prevent oxidation and blockage of its moving parts.
It is very important to ensure that the water temperature in the heating system does not exceed 65 °. In water heated to a higher temperature, a precipitate begins to actively form, which, interacting with the moving parts of the hydraulic machine, contributes to their active wear and, accordingly, the failure of the entire device.

It is necessary to inspect the circulation pump and check the correctness of its operation on a monthly basis. Such measures make it possible to identify malfunctions in the operation of equipment at the initial stage and promptly take appropriate measures.

Periodic inspection of the circulation pump will significantly reduce the likelihood of its failure during the heating season.

Checking the circulation pump for correct operation includes such actions as:

switching on the hydraulic machine to the operating mode and checking the level of noise and vibration generated by it;
checking the pressure (pressure level) of the coolant created in the discharge pipe (as mentioned above, the pressure of the liquid must be within the values given in the technical data sheet);
control of the degree of heating of the engine, which should not be too high;
checking for the presence of grease on the threaded connecting elements of the pump and applying it if it is absent;
checking the presence and correctness of the grounding of the body of the hydraulic machine;
checking for leaks both on the pump casing and in the places where it is connected to the pipeline (if leaks are present in such places, it is necessary to tighten the threaded connections and check the integrity of the installed gaskets);
Inspection of the terminal box and check if the wire is fixed in it (in addition, it is necessary to check whether moisture gets into the terminal box, which is unacceptable).

The main reason for the rapid wear of friction bearings in pumps is considered to be the increased contamination of the coolant.

It is possible to single out several of the most typical malfunctions for circulation pumps, which are quite realistic to fix with your own hands. Such malfunctions can be identified by their characteristic signs, without even disassembling the pump and without using complex diagnostic equipment.

A situation where the pump is noisy but the impeller is stationary is often caused by oxidation of the drive motor shaft. This can happen due to the fact that the hydraulic machine has not been used for a long time. To repair the heating pump with your own hands with such a malfunction, you must perform the following steps:

disconnect the power supply;
drain all water from the pump and the adjacent pipeline;
by unscrewing the corresponding screws, dismantle the drive motor together with the rotor;
resting on the working notch of the rotor with a hand or a screwdriver, turn it by force, moving it from a dead center.

Disassembled circulation pump

The pump will make noise, but it will not work even if a foreign object gets into its inner part, which blocks the rotation of the impeller. To repair the circulation pump in such a situation, do the following:

turn off the power supply;
drain water from the pump and the adjacent pipeline;
disassemble the pump according to the above scheme;
remove a foreign object;
a strainer is installed on the inlet pipe.

This is how the body of the circulation pump looks from the inside.

If the circulating pump is turned on, it does not make noise, but does not work either, there may be problems with the power supply. To identify the cause and eliminate such a malfunction, disassembly of the circulation pump may not be required: using a tester, they check the level and presence of voltage at the terminals of the device. In many cases, to eliminate such a malfunction, it is enough to correctly connect the pump to the power supply.

If there is a fuse in the design of the circulating pump, then it could burn out during a voltage drop in the mains, which can also be the reason why the heating pump does not work and does not make noise when it is turned on. To restore pump operation, simply replace the blown fuse.

Armed with a tester and a schematic diagram, you can find more serious breakdowns in the electrical part of the pump, for example, burned out windings

In the event that a layer of lime deposits has formed on the inner surface of the stator, the running pump will periodically stop. To solve this problem, it is necessary to disassemble the pump and clean all its internal parts from lime deposits.

The reason for the loud noise of the equipment when pumping liquid can be the presence of a large amount of air in the pipeline. To eliminate such a problem, it is enough to bleed air from the pipes. In order not to face this in the future, you can install a special unit in the upper part of the heating system circuit, which will automatically release air from the pipeline.

If the body of the hydraulic machine vibrates strongly when pumping the coolant, this may indicate that the bearing that ensures the rotation of the impeller is badly worn out. Repair of a circulation pump for heating in this case consists in replacing a worn bearing.

End graphite bearing of the "Grundfos" pump

Among the reasons for the discrepancy between the fluid pressure and the standard values at the outlet of the centrifugal pump are the following.

The impeller is rotating in the wrong direction.
The phase conductors in the terminal box are incorrectly connected (with three-phase connection).
The viscosity of the heating medium used is too high.
The filter installed on the suction line is clogged.

The specified issue is corrected according to the cause that caused the issue.

The reasons for such a malfunction may be incorrect connection of the phase wires in the terminal box, bad or oxidized contacts in the safety assembly of the device.

To repair the electronic component of the pump, you will need basic knowledge of electrical engineering.

This is another nuisance that occurs quite often during the operation of such equipment. Why is the circulation pump heating up? The reasons may be different, but such a situation always indicates that your equipment is operating under increased load.

Thus, many situations in which the circulation pump does not work or does not work correctly can be dealt with on your own, without resorting to the services of qualified specialists and without purchasing expensive spare parts and components for repair.

Before the start of the heating season, in order not to subsequently face the failure of the circulation pump and its repair, it is necessary to properly prepare the device for a long period of intensive work.

It is necessary to check the correctness of the pump insertion into the pipeline, referring to the arrow on the housing and the impeller rotation indicator. When installing a new pipeline for installing a circulating hydraulic machine, it is better to choose a section directly in front of the boiler, where the risk of air congestion is minimized.