Do-it-yourself pump repair

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

Do-it-yourself pump station repair will allow you to save not only money by dispensing with the help of specialists, but also time (there is no need to look for where to repair equipment and place an order to a service company, coordinate the time of the master's visit or go on your own, postpone current affairs for the duration of the visit) ... Experts' recommendations will help you navigate the situation, determine the type of malfunction and eliminate the defect. By following the advice precisely, you can deal with the problem that has arisen, but carelessness can lead to more complex damage.

Malfunctions of the pumping station and their elimination will not become a serious problem if the system is accurately diagnosed before starting work. In most cases, this does not require special equipment. It is possible to determine the type of breakdown by external signs and using elementary measurements for which the devices installed in the system are used.

If the pump works, at first glance, correctly, and there is no water in the tap at the same time, the way to correct the situation is determined by the cause of the problem. To find it, you will have to check some parameters and operating conditions.

Define check valve condition and performance, which is located inside a well or well. Trapped debris or sand can prevent it from opening, and a closed valve prevents fluid from rising to the pump.
Check if whether the section of the pipeline between the pumping unit and the source is filled with water... Sometimes, due to a malfunction of the equipment, in the event of a power outage or other disturbances, this gap remains empty, which prevents the pump from pumping liquid. The found void can be filled through a special hole.

A pumping station in a house with a pipeline connected to it from a water source

The most difficult situation is the presence of a large amount of insoluble impurities in water with abrasive action. Often, there is a large production between the casing and the impeller of the unit. "Depleted" water supply pumping stations for a private house require expensive repairs. In this case, it will be necessary to replace the equipment (housing and impeller, if it is possible to find components on sale that are identical to those available, or completely the pump).

Lack of water in the well can also cause water to not enter the system when the pump is running. One of the simplest solutions is to submerge the supply hose or pipeline deeper (but within the limits specified in the instruction manual).

The jerk mode is called frequent switching on and off of the pumping unit in automatic mode.

In this case, you should start checking the system by determining the pressure in the air chamber of the accumulator. You can determine the pressure using a car pressure gauge. If it is lowered, try pumping air into the chamber with a pump. Wait a while and measure again. If the pressure has dropped again, look for and eliminate depressurization site... The easiest way is to eliminate the leakage of the connections. If a hole has formed in the housing (for example, due to corrosion), you can use "cold welding".

Video (click to play).

If the pumping station is jerky, the reason may lie in damage to the diaphragm... To eliminate the defect, it must be replaced.

Frequent switching on and off may result pressure switch malfunctions.

If, during proper operation of the pump, the water from the tap goes in pulsating jerks, it means that the system is air leaks... All communications between the well (well) and the pump should be checked for leaks. Particular attention should be paid to the water level in the source and the correspondence of the pipe diameter to the suction height. The smaller the diameter, the lower the height should be. For example, a pipe diameter of 25 mm (or 1 inch) corresponds to a suction height of about 9 meters.

If the automatic shutdown of the pump does not work, it is impossible to operate such a water supply system. Emergency operation can lead to premature wear or destruction of equipment.

The reason for the non-stop operation of the pump is the incorrect operation of the pressure switch or its failure. In most cases, the repair of the pressure switch of the pumping station comes down to adjusting the device and setting the parameters of switching on and off using spring nuts under the cover of the device.

Pressure switch device - nut P is responsible for setting the lower pressure level in the accumulator, nut Δ P - for setting the difference between the upper and lower pressure levels

Another option for violations is blocking the relay with salt deposits when the quality of water in the source is low. In this case, it is necessary to remove the relay and clean the hole that comes into contact with the water.

In most cases, the failure to turn on the pump is associated with breaking the electrical circuit... A tester is required to thoroughly check and detect a break. First of all, check the supply communications and the pressure switch. In the latter case, pay attention to contact status - an oxide layer may form on them, which can be removed by cleaning using a file or fine-grained sandpaper.If no breaks are found in the section from the source to the pump inlet, you will have to thoroughly check all the components of the pumping unit:A burned-out engine can be restored by rewinding, but in some cases it will be necessary to purchase a new unit.To repair a pumping station with your own hands with such "symptoms", you may also need replacement of a failed starting capacitor.If the rotating parts of the pump do not move when turned on, and a characteristic hum appears, then the reasons for this phenomenon may be:

jamming of the impeller due to its "sticking" to the body during long-term storage of the pumping unit without use (the situation can be corrected by manually moving the impeller from its place and turning it several times),

capacitor breakdown (replace),

changing the parameters of the supply network (voltage is much lower than the nominal).

Learn more about how to set up a pump station pressure switch from our separate material.

On our website there is information about the technical characteristics of the Trickle pump, which has long established itself as an inexpensive but effective unit.

Find tips on choosing pumps for garden waterfalls and fountains here. Types and basic parameters.

Repair of domestic pumping stations will be required much less often and, which is important, it will become much cheaper if you follow all the recommendations of specialists at the installation stage.

There are separate rules for fixing the pump.

The base on which the pumping unit will be installed must be solid, solid and level.

To damp vibration, the pumping station can be installed on a rubberized mat

Place the pump as close to the water as possible.

The installation site of the pumping station must be ventilated to reduce the humidity and ambient temperature.

For the possibility of easy maintenance and repair of the pump, the unit is located no closer than 20 cm from walls and other stationary structures.

Before fixing the pump on the base, markings are made for drilling holes for fasteners.

The transfer pump is installed so that the pipes connected to it do not experience additional stress from mechanical stress.

In repairing a pumping station with your own hands, a video demonstrating work on disassembling the pump can also be useful to you.

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 pumpThe 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 designThe 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" typeFor 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 areasThe 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 eliminate 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 off the dead center.

Disassembled circulation pumpThe 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 casing of the circulation pump looks like from the inside.If the switched on circulation pump does not make noise, but also does not work, there may be problems with the power supply. To identify the cause and eliminate such a malfunction, disassembling the circulation pump may not be required: using a tester, they check the level and presence of voltage at the device terminals. 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 windingsIn 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" pumpAmong 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.

Read also: DIY opel astra h ecu repair

Marina Speroni pumping stations of various series are designed to ensure uninterrupted water supply to a summer house, garden, private house, etc.

Most often, these products are used:

for the organization of watering and irrigation of flower and vegetable gardens, various plantings and lawns;
to work with special garden sprinklers;
for taking water from various sources: reservoirs, water basins, streams, ponds, rainwater collection points and wells using the required filters.
Features of operation and technical characteristics of the Marina pumping station

All stations are equipped with a thermal relay that protects the motor from overheating. In the event that the temperature exceeds the permitted limit values, the pump turns off automatically.

All models of the Marina Speroni pumping station consist of the following main elements:

power cord with a plug;
fittings are connecting;
pressure gauge;
pressure switch;
hydroaccumulator;
surface pump.

After the pump turns on, water fills the system from the check valve to the end consumer.When the water intake by consumers is completed, the water pressure in the water supply system rises to the maximum value set by the relay settings. After that, the specified relay turns off the pump.

The reopening of any water taps leads to the beginning of the flow of water into it from the accumulator, where it is under excess pressure. In the process of consuming water, the pressure in this tank drops to a lower value, also set by the relay settings. After decreasing the pressure, the relay generates a command to turn on the pump. Water again begins to be pumped into the accumulator and supplied to consumers.

At the moment the maximum pressure in the accumulator is reached, the pump is turned off, etc. the cycles are repeated until the moment when water intake by consumers stops. The accumulator, absorbing a certain volume of water, plays the role of a water hammer damper, which are extinguished in it. Such a technical solution allows to achieve energy savings and does not allow motor overload.

The accumulator itself has the following design: a steel tank with an internal anti-corrosion coating and equipped with a replaceable membrane, which is made of food-grade rubber, equipped with a pneumatic valve for pumping compressed air into it.

disassemble and repair the pump yourself;
operate it without grounding;
operate without water;
allow air to enter the suction line.

Technical characteristics of Marina pumping stations

The main requirement that the manufacturer makes for the installation of the station is the performance of all electrical work by qualified electricians who have the appropriate approval groups. The specified work must be performed in strict accordance with the requirements of PTE and PTB.

A mandatory requirement is the installation of an RCD designed for leakage currents of 30 mA.

The diameter of the pipe installed on the suction line of the station should not be less than the diameter of the inlet opening. In cases where the suction head is 4 meters or more, or the horizontal section of the water supply (suction line) exceeds 20 meters, the specified diameter must exceed the inlet diameter.

When installing the suction line, you should control whether the angle of inclination of the line from the pumping station to the water intake is 1 or more degrees. Reverse angles are strictly unacceptable.

Installation is carried out in the following sequence:

The pump is placed as close as possible to the suction source.
A suction pipe equipped with a check valve is connected to the end inlet. To do this, it is recommended to use a special adapter, which is not included in the delivery set and must be purchased separately.
The pressure line is connected to the upper outlet of the pump.
Through the filler opening, the suction line and the pump housing are filled with water. To do this, unscrew and then screw on a special plug on the top of the pump.
Checking the presence of voltage in the network.
The pump is connected to the network.

When installing pumping stations of the models listed in the table above, be sure to check that air is pumped into the accumulator under a pressure of 1.5-2 atmospheres. If the pressure is less, then it should be pumped through the existing pneumatic valve with a conventional automobile pump. The pressure in the specified device must be monitored monthly, first draining the water from the pressure line for this.

The most common malfunctions of Marina pumping stations are described below.

Although the pump rotates, no water enters the system. The reason for this situation may be:

violation of tightness in pipelines;
lack of water in the pump or pipeline;
the check valve is not functioning correctly.

You can eliminate the malfunction by performing the following steps step by step: check for the presence of water, if there is no water, top up through a special hole or lower the suction hose (or the pump itself) deeper. In this case, it should be monitored that the distance from the water surface to the pump remains the maximum allowed.

If there is water, then the check valve is checked. If it is in good technical condition, the tightness of the pipelines (at the joints) is checked and possible violations of the latter are eliminated.

In cases where this did not help, the likely cause can be considered a failure of the pump due to the ingress of a large amount of abrasives (sand, for example) into it. Here you need to disassemble the pump and change its impeller or housing. In exceptional cases, the pump will need to be replaced.

In areas where the voltage in the network is subject to significant fluctuations, you should check its value. The pump may not be working due to a strong drop.

The station began to work in spurts. Excessively frequent switching on of the station can be caused by damage to a part of the hydraulic tank, which does not allow to gain the specified pressure in it. Eliminate the indicated cause as follows: press the nipple located on the back of the tank. If not air, but water comes out of it, the inner membrane, which has mechanical damage, should be replaced.

Another reason may be a violation of the tightness of the tank body itself. The breakdown point should be found and sealed. In some cases, the problem is solved by simply pumping air to a predetermined pressure value (1.5 - 1.8 atm). This procedure is performed through a standard fitting on the product. A possible reason may be a violation of the tightness of the joints of the water conduit at the suction section. Check and eliminate leaks.

The pump has stopped turning on. This happens when there is no power. It is necessary to check the integrity of the pressure switch windings or clean the burnt contacts. If the engine is burnt out, it is easy to understand by the characteristic smell.

The pump turns on, but the impeller does not rotate. There are two reasons: either it "stuck" to the body of the pump itself, or the capacitor has broken. Most often, such malfunctions occur at stations that have not worked for a long time.

You can fix it like this: turn the impeller by hand several times, and the pump will start. If the capacitor breaks down, it will need to be replaced.

The station works constantly and does not turn off. This is caused by a malfunction of the pressure switch. To eliminate the malfunction, it must be adjusted. These purposes are served by two springs placed on the relay: a small one and a large one. The adjustment technology is described in the corresponding instructions.

Video (click to play).

When performing the full scope of preventive maintenance and servicing of the pumping station, the likelihood of malfunctions is minimized. The identified faults should be eliminated promptly and, preferably, by professional repairmen. This will allow you to restore the water supply in the shortest possible time.