Where to call the emergency service to call the master at the house of nabbat rostov bataysk. Automation unit for pumps Jileks automation unit goes into protection

/ Automation unit for the pump

We offer for sale modern automation units for pumps manufactured by Jileks. Before buying an automatic device, we suggest that you familiarize yourself with its characteristics.

The automation unit (automatic device) allows you to automate the operation of the electric pump, start it when the pressure drops (when you open the tap) and stop it when the water flow in the water supply system stops (when you close the tap). In addition, the automation unit protects the pump from running dry ("dry running").

The automation unit is designed to pump clean water that does not contain solid particles. In the presence of solid particles, it is necessary to install a filter at the entrance to the automation unit. The presence of a pressure gauge provides visual control of the pressure in the water supply system.

Operating principle

The automation unit starts the electric pump within 20-25 seconds after connecting to the mains. Subsequent starts of the electric pump occur when the starting pressure is reached, under the influence of opening the valve. Unlike systems with a pressure-tank switch, the condition for stopping the electric pump is not dictated by the achievement of a certain pressure in the system, but is determined by a decrease in flow to minimum values. As soon as the automation unit detects this condition, it stops the electric pump with a delay in the interval of 7 + 15 seconds, the timing logic is aimed at reducing the frequency of operation of the electric pump in low flow conditions.

The automation unit can be used in conjunction with

Installation

1. The pressure gauge can be mounted on one of the two sides of the automation box using an O-ring and two mounting screws. Having chosen a convenient location of the pressure gauge, on the opposite side, plug the hole with a screw without using any seal. Install the automation unit in a strictly vertical position at any point located between the pump feed and the first tap (tap) so that the inlet (1 "external thread) is connected to the direction of the water flow out of the pump, and the side outlet (external thread 1 ") corresponded to the direction of flow in the pipeline. Make sure the hydraulic connections are completely tight. In the case of using an electric pump with a maximum pressure of over 10 bar, it is necessary to install a pressure reducer at the inlet to the automation unit.

2.For electrical connection, follow the diagram shown on the cover of the circuit board. When using the automation unit with three-phase or single-phase electric pumps with a switching current exceeding 10 A, use an electromagnetic starter. It is necessary to use an electric cable with a thermal resistance of at least 99 ° C.

3. The starting pressure is set to 1.5 bar, which is the optimal value for most applications. This value can be changed using the adjusting screw located on the top of the automation box marked "+" and "-".

Automation unit startup

ATTENTION: If the level of the filled water is lower than the level at which the pump is installed, it is imperative to use a bottom check valve on the suction pipe.

1. Before starting the operation, completely fill the suction pipe and the electric pump with water and start the latter, thereby giving power to the “NETWORK” automation unit. After stopping the electric pump, open the tap located at the highest point.

2. The setting is correct if the electric pump runs continuously and there is a regular flow of water at the outlet of the tap. In the absence of water flow, it is possible to prolong the operation of the electric pump by holding the "RESET" button pressed for an interval exceeding the timekeeping time of the automation unit. If, in this case, there is no flow, you should turn off the power supply to the electric pump, and repeat the procedure starting from point 1.

Dry code protection

The red PROTECTION indicator lights up when the electric pump is turned off, signaling the danger of dry running. After making sure that the suction line is filled with water, start the electric pump by pressing the "RESET" button.

Specifications

Voltage - 230-240 V 50/60 Hz
Maximum switched current - 10 (6) A
Starting pressure - 1.5 + 3.5 atm.
Maximum water flow - 80 l / min
The maximum allowable pressure is 10 atm.
Maximum water temperature - 60 ° С
Connecting dimensions - 1 "
Protection degree - 1P65

ATTENTION:
A non-return valve located between the electric pump and the automation unit, as well as after the automation unit, may cause the automation unit itself to malfunction.
Starting pressure adjustment must be carried out by competent personnel in accordance with all safety regulations.
This operation is aimed at changing the starting pressure for switching on the electric pump.
The shutdown pressure of the automation unit is not adjustable, and corresponds to the maximum pressure generated by the electric pump.

Reading 5 min.

Dzhileks automatics are multifunctional, easy to install and install, affordable. It can work with both native pumps and pumps from other manufacturers to automate the water supply.

The company offers reliable and modern pump automation options that have a long service life and good performance. Let's take a closer look.

Total pump automation

We start the automation as follows:

Immediately before turning on the device, fill the inlet pipe of the pump with water and start it up (the “Network” LED should light up). This manipulation will turn on the automation unit. As soon as the pump starts to work and, after a while, stops, you need to open the outlet valve, which is at the highest point.
If the pump runs all the time with the tap open, and provides a continuous flow of water, the installation is considered correct. The lack of water flow means that you need to hold down the "Reset" button and hold it for the duration of the automatic system response time. If, with such manipulation, the flow is still absent, you need to repeat the launch.

Idling protection

When the "Protection" LED on the automation unit lights up, and the pump itself is turned off, this may indicate the danger of idle operation of the system. This is how press control works.

Recheck all systems. If everything is in order, drain the water from the incoming system and refill it. Then click the "Restart" button.

Optimum pump automation performance

Vibrating or any other type of pump can be additionally equipped with automation systems. But, they have different parameters, properties, etc. Which ones should you buy?

Technical indicators (optimal):

Working voltage \u003d 210-250 V;
Frequency \u003d 40/70 Hz;
Minimum working pressure \u003d 1-4 atm .;
Load current \u003d 6-10 A;
Water flow rate \u003d 70-100 l / min;
Upper pressure threshold \u003d 15 atm .;
Limit water temperature \u003d 75 degrees;
Inlet pipe diameter \u003d 1 inch;
Protection degree \u003d 1P65.

What do you need to know about?

Important! The valve located in the pipe section between the automatic / pumping systems and the valve running on the outlet pipe of the automatic unit are the culprits of equipment malfunction.

The minimum working pressure of the equipment must not be changed by yourself. This should be done by electricians who have experience, are familiar with the regulations and comply with safety standards.

The limiting working pressure is not automatically regulated. It corresponds to the indicator of the electric pump.

We offer for sale modern automation units for pumps manufactured by Jileks. Before buying an automatic device, we suggest that you familiarize yourself with its characteristics.

Operating principle

The automation unit starts the electric pump within 20-25 seconds after being connected to the mains. Subsequent starts of the electric pump occur when the starting pressure is reached, under the influence of opening the valve. Unlike systems with a pressure-tank switch, the condition for stopping the electric pump is not dictated by the achievement of a certain pressure in the system, but is determined by a decrease in flow to minimum values. As soon as the automation unit detects this condition, it stops the electric pump with a delay in the interval of 7 + 15 seconds, the timing logic is aimed at reducing the frequency of operation of the electric pump in low flow conditions.

The automation unit can be used in conjunction with the pressure switch RDM-5

Installation

1. The pressure gauge can be mounted on one of the two sides of the automation box using an O-ring and two mounting screws. Having chosen a convenient location of the pressure gauge, on the opposite side, plug the hole with a screw without using any seal. Install the automation unit in a strictly vertical position at any point located between the pump feed and the first tap (tap) so that the inlet (1 ″ external thread) is connected to the direction of the water flow out of the pump, and the side outlet (external thread 1 ″) corresponded to the direction of flow in the pipeline. Make sure the hydraulic connections are completely tight. In the case of using an electric pump with a maximum pressure of over 10 bar, a pressure reducer must be installed at the inlet to the automation unit.

Automation unit startup

ATTENTION: If the level of the filled water is lower than the level at which the pump is installed, it is imperative to use a bottom check valve on the suction pipe.

Dry code protection

www.agrovodcom.ru

1 Total pump automation

The Jileks Crab automation unit is a device that automates the operation of an electric pump. It turns on the system when the pressure drops (the valve opens), and turns it off when the flow stops (the valve closes). Automation also consists in protecting the pumping station during its "idle" - work without water, on "dry running".

Automatic Jilex block is applied only to clean water, which does not contain solid elements. If the latter are available, then a filter element must be purchased separately for the automation unit. And if you mount a pressure gauge, then the pressure can be monitored visually.
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1.1 How does it work?

The automatic Jileks 9001 unit turns on 30 seconds after connecting to the mains. Then it shuts down and goes to sleep. Further switching on of the device occurs when the pressure changes - opening and closing the valve.

As soon as the pressure level drops to the minimum permissible rate, the control element of the automation will turn off the pump. So the safety and efficiency of the device is significantly extended.

After lowering the pressure to the minimum permissible level, the system will not turn off immediately, but after several tens of seconds (usually from five to twenty, depending on the specific model). The delay in turning off the pumps is needed so that, with a weak water pressure, it does not systematically turn off. This extends the life of the system.
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1.2 Jelex Automation Unit (Jileks): considering the insides (video)

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1.3 Installation

To automate pump control, you need to purchase the appropriate additional components for it (depending on your needs), and connect them in the following sequence:

The pressure gauge is attached to the side of the automatic unit using the supplied mounting hardware. Which side to fix - "a matter of discretion." But, it is important to carefully fix the device to the panel without using sealing elements.
The automation unit is mounted exclusively in a vertical position. It can also be fixed in any convenient place, but in the section between the tap (the first water intake point) and the pump supply system. Moreover, this must be done so that the external inlet of the system is adjacent to the water outlet from the pump, and the lateral outlet is adjacent to the water flow in the pipe.
All connections must be tightly secured. It is worth making sure of their tightness and re-checking the correctness of connection of all connecting elements.
If the automatic equipment is used for electric pumping systems with a maximum pressure threshold of 15 bar, then a pressure reducer is installed at the input of the automation.
The device body (or circuit board) contains the electrical circuit for connecting the automation. Follow it strictly when connecting! If a single or three-phase pump with an operating current of more than 10 Amperes is used, the automation must be connected via an electromagnetic starter. The cable used to connect the device must be resistant to high temperatures (above 100 degrees) and non-combustible.

Automatic regulation and actuation of systems (minimum head) is designed for a pressure of 2 atm. This option is the most common and optimal for most systems. But, this parameter can be easily adjusted if necessary. This is done by rotating the crane, which is located on top of the automatic system, and has markers "plus" and "minus".

1.4 Starting the automatic system

Important! When the level of the incoming water is lower than the level at which the pumping system is installed, it is imperative to install a non-return bottom valve on the inlet pipe.

We start the automation as follows:

Immediately before turning on the device, fill the inlet pipe of the pump with water and start it up (the “Network” LED should light up). This manipulation will turn on the automation unit. As soon as the pump starts to work and, after a while, stops, you need to open the outlet valve, which is at the highest point.
If the pump runs all the time with the tap open, and provides a continuous flow of water, the installation is considered correct. The lack of water flow means that you need to hold down the "Reset" button and hold it for the duration of the automatic system response time. If, with such manipulation, the flow is still absent, you need to repeat the launch.

1.5 Protection against idling

When the "Protection" LED on the automation unit lights up, and the pump itself is turned off, this may indicate the danger of idle operation of the system. This is how press control works.

Recheck all systems. If everything is in order, drain the water from the incoming system and refill it. Then click the "Restart" button.
to the menu

2 Optimum pump automation performance

Vibrating or any other type of pump can be additionally equipped with automation systems. But, they have different parameters, properties, etc. Which ones should you buy?

Technical indicators (optimal):

Working voltage \u003d 210-250 V;
Frequency \u003d 40/70 Hz;
Minimum working pressure \u003d 1-4 atm .;
Load current \u003d 6-10 A;
Water flow rate \u003d 70-100 l / min;
Upper pressure threshold \u003d 15 atm .;
Limit water temperature \u003d 75 degrees;
Inlet pipe diameter \u003d 1 inch;
Protection degree \u003d 1P65.

2.1 What you need to know about?

Important! The valve located in the pipe section between the automatic / pumping systems and the valve running on the outlet pipe of the automatic unit are the culprits of equipment malfunction.

The minimum working pressure of the equipment must not be changed by yourself. This should be done by electricians who have experience, are familiar with the regulations and comply with safety standards.

The limiting working pressure is not automatically regulated. It corresponds to the indicator of the electric pump.

nasosovnet.ru

Principle of operation

Despite the fact that the relay regulates the pressure of the water pressure, its mechanisms provide for electrical components. Two contacts are closed under water pressure, so the connection to the mains is carried out:

when the head is below the set upper pressure limit, the relay contacts remain closed, the pump continues to pump water;
when the pressure exceeds the upper pressure limit, the contacts open, the pump stops working.

The principle of operation is not complicated, but consumers have some difficulties when the pressure switch is adjusted, the lower and upper limits are set.

Adjustment technique

The pressure switch setting by manufacturers in factories is not always accurate or not suitable for local operating conditions. But the design is made so that each owner can adjust the necessary parameters himself without any problems. In private houses, pumps at the water supply point in front of the accumulator must create a head pressure of at least 1.4 atmospheres. Otherwise, the adjustment does not make sense, the contacts will not close, and the pump will not turn on. There must be a pressure gauge at the connection point, according to its readings, the pressure value is judged:

Relay connection diagram to expansion tank

We connect the pressure switch to the receiving point, as required by the instructions, the hydroaccumulator is not connected, a plug is installed instead. The pump is connected to the network - in this way the operation of the relay is checked at the factory settings and the tightness of the network to the relay.
Record the pressure gauge reading (3 atmospheres).
Remove the housing cover from the relay.

Pressure adjustment screws under the housing cover

Under the housing cover there are large and small nuts with springs, when the large nut rotates clockwise, the fixing spring is compressed, the upper limit increases. Decrease the upper limit by turning the large nut counterclockwise.

Adjust the pump shut-off moment with a large nut, the best option is 2.5–3 atmospheres, let's take 2.8.

Check the pressure in the accumulator, it must have a separate pressure gauge, let's assume that it is 1.5 atm. Connect the expansion vessel to the relay.

Open the tap at the highest point of the water supply, if the pressure is not enough, pump it up with a bicycle pump in the expansion tank to the required pressure.
Having opened the water, observe at what value of the pressure gauge the relay will turn on the pump. Record the lower limit reading when the pump turns on when the head drops. Let's assume that this value will be 1 atmosphere.
2.8-1 - the difference between the lower and upper limits will be 1.8 atm., Which is 0.3 atmospheres more than the pressure in the expansion tank.

The instruction manual specifies that the lower limit pressure should ideally be 0.2 atmospheres higher than the pressure in the expansion tank. With such a ratio of installation, the number of starts for the electric pump is optimal, which significantly extends the service life of the pump and relay. The difference can be corrected with a small bolt with a spring or by changing the pressure in the accumulator, pump up or bleed air. Correctly installed pressure switches RDM 5 "Dzhileks" will make the pump mode more economical, reduce power consumption and last a long time.

domelectrik.ru

What functions does the device perform?

In private houses, where the water supply is not connected, the issue of providing drinking quality water is solved in 2 ways:

installation of a container or device of a pool filled with imported water;
drilling a well to an aquifer.

Water is supplied to the house using a pump of the required power. But the amount of water pressure during its operation is too high to connect the pump unit directly to the internal water supply networks. Therefore, an intermediate tank with a membrane is installed in the house - a hydraulic accumulator, and the required pressure in the network is maintained by the pressure switch RDM 5. The device allows you to automate the process of water supply in autonomous water supply systems.

Operating principle

The device consists of a brass body with fittings for connection to the water supply network, spring valves and an electrical relay. The elements are closed from the outside with a plastic cover. The scheme of operation of the pressure switch RDM 5 is as follows:

The manufacturer sets the device to the lowest pressure limit of 1.4 bar, the highest - 2.8 bar. When the pressure in the accumulator is less than the lower limit, the relay contacts are closed, and the pump pumps water into the intermediate membrane tank.
When the pressure rises to the upper limit (2.8 bar), the spring-loaded valve is activated and opens the relay contacts. The water supply stops.
When there is a drawdown in the house, the accumulator begins to empty, the pressure decreases, and when the lower threshold of 1.4 bar is reached, the relay contacts close again and the pump resumes its work.

As a rule, the RDM 5 device is equipped with ready-made pumping stations, consisting of a pump, a water accumulator tank and a control relay itself. The station is set up at the factory and is completely ready for operation; all that remains is to connect it to the pipe and the mains. But finished products are not suitable for everyone for the following reasons:

the capacity of the accumulator is insufficient;
the head of a standard pump is small to ensure water supply to the required height;
a submersible pump is used, lowered into the well.

In these cases, the automatic water supply system will have to be assembled from separate elements, and the pressure switch must be adjusted accordingly, coordinating its operation with the storage tank. Before purchasing and connecting a device, it is recommended to study its technical characteristics:

pressure regulation range in the water supply system - from 1 to 4.6 bar;
ambient temperature range - from 0 to +40 ° С;
minimum pressure drop - 1 bar;
supply voltage - 220 V;
diameter of fittings - DN 15, connection - G ’’.

If, according to some of the technical characteristics, the RDM 5 relay does not suit you, then you will have to look for another regulator. But practice shows that the parameters of this device meet the requirements of the overwhelming number of autonomous water supply systems.

How to adjust the device?

The pressure switch is set up after installing the internal and external water supply network of the house and connecting to the electrical network.

External and internal pipe connections must be verified by tests so that subsequent leaks do not interfere with the adjustment process. Due to the leakage of the joints, the pressure before the pump or after it will spontaneously decrease, which will also affect the operation of the relay.

Before adjusting, determine the required head value. In order to supply water to all points of water intake located on different floors, it is necessary to provide the necessary pressure in the accumulator. The efforts of the tank membrane should be sufficient to push the entire volume of water to the required height and overcome all local resistance. At home, this pressure value is most often determined experimentally.

The calculation is simple: 1 m of the lifting height is equal to 10 m of the horizontal section and corresponds to a pressure of 0.1 bar. The farthest branch of the water supply is taken into account. Having approximately determined the required pressure, it is necessary to create such a pressure from the side of the air chamber of the accumulator. To do this, remove the plastic cap from the spool (usually located at the end of the tank) and pump the air chamber with a conventional automobile pump, controlling the pressure with a manometer.

Without connecting the branch pipe of the internal water supply network, check how the relay works together with the pump at the factory settings. At the same time, check the tightness of the external pipeline.
Remove the plastic relay cover covering the adjusting screws.
The large screw adjusts the upper limit (pump shutdown), the small screw adjusts the differential pressure. Adjust the lower limit so that it is 0.2 bar more than you pumped into the accumulator.
To reach the exact values, you will have to adjust several times, opening the faucet taps and draining water from the accumulator. At the same time, record the pressure gauge readings when the pump is turned off and on and correct them with the adjusting screws.

As a result of the settings, the difference between the lower and upper limits should not be less than 1 bar. Practice shows that the optimal pressure drop is about 1.5 bar, then the pump will not turn on too often. At the end of the adjustment, do not rush to put the cover back in place, follow the system for 1 day. May need some minor adjustments.

pikucha.ru

1 Features of the company control unit

The main element of the company's pumping process automation is the Jileks automation unit. Such a device is connected directly to the pumping device and reacts to the pressure level in the system.

Dzhileks block consists of a plastic case with a metal cover. Inside the housing there is a spring, an electronic unit, complete with a pressure switch and a movable mechanism that closes the contacts when the pressure drops. For external control over the operation of the device, a pressure gauge is mounted on the side surface of the unit.

The device is designed to operate on the basis of a pumping station or other surface pump pumping clean water. Use with a low content of abrasive impurities is also possible, but in this case the device is equipped with an additional filter.
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1.1 How the device works

Dzhileks automatics functions independently from the usual electrical network. After 30 seconds after installing and connecting the unit, it turns on and works within a few seconds. Further, the device turns off and is activated only in case of a change in the pressure in the line.

When the tap at the point of use is opened, the pressure in the pipe begins to drop rapidly. In this case, the unit immediately turns on and, when the minimum pressure indicator is reached, activates the electric pump. The appliance pumps water until the pressure is equalized again (when the tap is closed). After the tap is closed, the device works for another 5-20 seconds, continuing to pump water into the line. Such a measure is a precaution in case the pressure in the system drops below normal and the device is not able to track the pressure level.
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1.2 JELEX AUTOMATION UNIT (JILEX): LOOKING INSIDE (VIDEO)

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2 Correct installation of the device

Dzhileks 9001 automation is installed in the supply line complete with additional equipment. Therefore, an important step is the correct installation and configuration of all components. Installation of the automatic control unit from Jileks is carried out in the following order:

First of all, if you purchased a modification without measuring instruments, you should purchase a pressure gauge and install it on the side panel. The mechanism is required to monitor and control the unit.
The automatic device itself crashes into the water main in the area between the point of water consumption (tap) and the pumping device. The unit is installed exclusively in a vertical position, with a blue metal cover up. In this case, the inlet of the device (indicated in the instructions) must be located on the pump outlet side. The outlet leads the water further into the supply line.
After the control device is mounted in the line, it is necessary to carefully inspect all joints and connections for tightness. If errors are found during installation, they should be sealed with sealant or connectors.
The connection of the unit to the network is carried out strictly according to the scheme indicated in the instructions. Moreover, if the device completes a pump with a current of more than 10 amperes, a magnetic starter is additionally installed. The main requirement for the electrical cable used with the device is increased resistance to high temperatures.

If necessary, the supply line is supplemented with filters for water purification and a receiver to equalize the pressure in the system.

After all the components are installed in the line, you need to check the device. For this, the pump inlet through the pipeline is filled with liquid and the pump is turned on. One of the indicators immediately lights up on the unit. This indicates that there is contact between the unit and the pumping device. For several tens of seconds, the device works and then turns off.

After the device turns off, it is necessary to open one of the taps (if there are multi-level, then the topmost one is desirable). However, there are two options:

In the first case, water will flow from the tap in a continuous, uninterrupted flow. The unit turns on, and the pumping device operates throughout the entire period of use of the crane. In this case, the device is installed correctly.
If the water flow is unstable or absent altogether, you can try to restart the device with the “Reset” button. The button is pressed and held until the pumping device works. If, in this case, nothing has changed, a thorough inspection of the device and the entire line is carried out, and, if necessary, dismantling and adjustment.

3 Unit-compatible pumping units

Automation from Jileks is a universal device. With its help, the operation of pumping devices from various manufacturers can be regulated. Regarding the principle of operation, such a pressure equalization mechanism is installed on a vibrating, centrifugal, vortex, screw pump.

The device works most efficiently in combination with pumping devices that meet the following characteristics:

current strength in the range of 6-10 A;
device productivity up to 100 l / min;
voltage not higher than 250 V;
the maximum temperature limit of the pumped liquid is 75 degrees;
connection to a pipe with a cross section of 1 inch.

4 Other options for Jileks automation

In addition to the automation unit, the company also produces less popular automation options for pumping equipment. One of these options is the installation of Jilex Crab. The device is responsible for the stable pressure in the supply line, starts and stops the pump if necessary. In addition, the filter element removes solids from the stream.

Jilex Crab consists of the following components:

polymer hydraulic valve;
receiver tank with a volume of 24 or 50 liters, covered with anti-corrosion enamel;
electrical pressure switch;
a filter with a replaceable cartridge, which is responsible for cleaning the water stream from impurities;
pressure gauge;
two electrical cables;
special bracket for fixing the unit to the wall.

The device operates on the basis of a standard 220 V electrical network. Suitable for simultaneous connection of 2-3 water intake points. An adjustable relay allows you to set, even before starting work, the pressure level that the device will maintain. Like the previous type of devices, the Crab 50 is a universal device and is suitable for connection to downhole pumps of any manufacturer.
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4.1 Pressure switch RDM-5

A simpler option for automating a pumping station is to install a special relay RDM-5 on it. The compact device is mounted in the pipeline and connected to the pumping unit using an electric cable. The wire is fixed to the relay contacts.

The principle of operation of the device is as follows. The device reacts to the pressure level in the line. If the indicator is below the set value, the contacts are connected, the current is supplied to the water intake point and the liquid fills the pipeline until the pressure returns to normal. When the pressure level returns to normal (this indicator is also set by the user), the contacts diverge. The power supply to the downhole apparatus is interrupted and it is turned off.

The minimum and maximum indicators at which the pumping device is triggered are set by the user. They can be adjusted using two nuts that fix the degree of spring tension. A larger nut, when rotated counterclockwise, sets the maximum pressure, a smaller nut, when rotating, allows you to adjust the difference between the maximum and minimum value.

RDM-5 is designed to be used exclusively in water. The operating voltage for the device is 220-230 V. The temperature of the pumped liquid is 0-40 degrees. The relay is fixed to a ¼ ”pipeline. A prerequisite for using the RDM-5 is a high-quality grounding.
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4.2 Float switch Djileks

For drainage, sewage and surface water pumps, the cheapest and most practical automation method is a float switch. According to the scope of use, such devices are divided into light and heavy. Drainage models are equipped with a light float, heavy floats are installed at water supply stations and water pumps.

The structure consists of an electrical cable 3.5, 8 or 10 m long and a plastic float mechanism. Inside the float there are two contacts, a switch lever and a ball that changes the position of the lever. By the number of wires, two and three-wire floats are distinguished.

In the version with two wires, they are directly connected to the contacts of the float. When such a mechanism rises with the water level to the indicated level, the lever presses on the contacts, they close and supply energy to the pump.

In models with three wires, the ability to turn on the fence point in the uppermost and lowermost positions is supported. To do this, one wire goes to one of the contacts, and the other two wires, depending on the position, go to the second contact.

The principle of operation of such a float mechanism is that the device automatically turns on the pump when the water level rises to the set value. In the case of a two-wire device, the float, on the contrary, opens the contacts and turns off the device when the water falls below normal.

byreniepro.ru

The device and principle of operation of automation for the pump

There are various means of automation for pumps, among which there are dry-running blockers, water pressure switches, electronic units, sensors, etc. As a rule, electronics operate in conjunction with additional equipment (hydraulic accumulator, float switch, etc.). In this case, the regulation of the operation of the pumping group can be carried out both by pressure and by flow. An important component is a pressure gauge that provides visual control of the parameters of the water supply network.

Today, several generations of pump automation are distinguished. The latest electronic devices are considered the most efficient due to high-tech equipment, enhanced functionality and more sophisticated settings.

General working principle:

when the pressure drops, the unit independently starts the pumping unit (in particular, this happens when the taps are opened);
in the absence of water flow, the electric pump is turned off (all taps are closed);
automatic shutdown of the pumping group can also occur if the fluid flow is not high enough (protection against "dry running").

www.jeelex.ru

The device and principle of operation of the water pressure switch

Structurally, the relay is made in the form of a compact block with springs of maximum and minimum pressure, the tension of which is regulated by nuts. The diaphragm, connected to the springs, reacts to changes in pressure. When the minimum value is reached, the spring weakens, and when the maximum level is reached, it is compressed more. The impact on the springs causes the relay contacts to open (close), switching off or on the pump.

The presence of a relay in the water supply system allows the system to maintain constant pressure and the required water pressure. The pump is automatically controlled. Correctly set minimum and maximum pressure levels ensure its periodic shutdown, which contributes to a significant increase in trouble-free service life.

The sequence of operation of the pumping station under the control of the relay is as follows:

The pump pumps water into the tank.
The water pressure is constantly increasing, which can be monitored on the pressure gauge.
When the set upper limit pressure level is reached, the relay activates and turns off the pump.
As the water pumped into the tank is consumed, the pressure decreases. When it reaches the lower level, the pump will turn on again and the cycle will repeat.

The main parameters of the relay:

Lower pressure (switch-on level). The relay contacts, which turn on the pump, close, and water enters the tank.
Upper pressure (cut-off level). The relay contacts open, the pump turns off.
The pressure range is the difference between the two previous indicators.
The value of the maximum allowable shutdown pressure.

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Pressure switch setting

In the process of assembling the pumping station, special attention is paid to setting the pressure switch. The ease of operation of the water supply system, as well as the terms of trouble-free service of all components of the device, depend on how correctly its limit levels are set.

At the first stage, you need to check the pressure that was created in the tank during the manufacture of the pumping station. Typically, the factory setting is set at 1.5 atmospheres for on and 2.5 atmospheres for off. Check this with an empty tank and a pumping station disconnected from the mains. It is recommended to check with an automotive mechanical pressure gauge. It is housed in a metal case, so measurements are more accurate than with electronic or plastic gauges. Their readings can be affected by both the room temperature and the battery charge level. It is desirable that the scale limit of the pressure gauge be as small as possible. Because on a scale of, say, 50 atmospheres, it will be very difficult to accurately measure one atmosphere.

To check the pressure in the tank, you need to unscrew the cap that closes the spool, connect the pressure gauge and take a reading on its scale. The air pressure should be checked periodically thereafter, eg once a month. In this case, water must be completely removed from the tank by turning off the pump and opening all the taps.

Another option is also possible - carefully monitor the pump shutdown pressure. If it increases, this will mean a decrease in air pressure in the tank. The lower the air pressure, the more water can be created. However, the pressure spread from a completely filled to practically empty tank is large, and all this will depend on the preferences of the consumer.

Having chosen the desired operating mode, you need to install it, bleeding off excess air for this, or pump it up additionally. It must be borne in mind that you should not reduce the pressure to a value less than one atmosphere, and also pump it too much. Due to the small amount of air, a rubber container filled with water inside the tank will touch its walls and wipe clean. And excess air will not make it possible to pump a lot of water, since a significant part of the tank's volume will be occupied by air.

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Setting the pump on and off pressure levels

In pumping stations, which are delivered assembled, the pressure switch is pre-configured for the optimal option. But when installing it from various elements at the site of operation, the relay must be set up. This is due to the need to ensure an effective relationship of the relay settings with the tank volume and pump head. In addition, it may be necessary to change the initial setting of the pressure switch. The procedure should be as follows:

In practice, the power of the pumps is chosen such that it does not allow the tank to be pumped to the extreme limit. Usually the cut-off pressure is set a couple of atmospheres above the cut-in threshold.

It is also allowed to set limit pressure levels that differ from the recommended values. In this way, you can set your own version of the operating mode of the pumping station. Moreover, when setting the pressure difference with a small nut, one must proceed from the fact that the starting point of reference should be the lower level set by the large nut. The upper level can be set only within the limits for which the system is designed. In addition, rubber hoses and other plumbing also withstand pressure, not higher than the calculated one. All this must be taken into account when installing the pumping station. In addition, excessive pressure of water from the tap is often completely unnecessary and uncomfortable.

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Pressure switch adjustment

The adjustment of the pressure switch is practiced in cases where it is necessary to set the levels of the upper and lower pressures to the specified values. For example, you want to set the upper pressure to 3 atmospheres, the lower - 1.7 atmospheres. The adjustment process is as follows:

Turn on the pump and pump water into the tank until the pressure on the pressure gauge is 3 atmospheres.
Switch off the pump.
Open the relay cover and slowly rotate the small nut until the relay picks up. Clockwise rotation of the nut means an increase in pressure, in the opposite direction - a decrease. The upper level is exposed - 3 atmospheres.
Open the tap and drain the water from the tank until the pressure on the manometer is 1.7 atmospheres.
Shut off valve.
Open the relay cover and slowly rotate the large nut until the contacts engage. The lower level is exposed - 1.7 atmospheres. It should be slightly higher than the air pressure in the tank.

If high pressure is set for shutdown and low pressure for shutdown, the tank is filled with a lot of water and there is no need to turn on the pump frequently. Inconvenience occurs only due to the large pressure drop when the tank is full or almost empty. In other cases, when the pressure range is small, and the pump often has to be pumped up, the water pressure in the system is uniform and quite comfortable.

In the next article, you will learn about connecting a hydraulic accumulator to a water supply system - the most common connection schemes.

will extend the life of the pump;

General working principle:

When choosing an automation for a pump, consider the following technical characteristics:

connecting dimensions in inches;
power consumption;
mains voltage;
degree of protection;
highest water flow rate (liters per minute);
maximum withstand pressure;
temperature range of the working environment.

Specifications Description

Not a single autonomous water supply network can do without pumping units. They create the required pressure, providing fluid supply to the draw-off points. However, the use of water will become really convenient only if there is an automation for the pump. This functional block will take the quality of water management to a new level. As a result, the operation of the equipment will be optimized.

High-tech and functional automation:

will extend the life of the pump;
will start and shut it down depending on the fluid pressure in the pipeline;
protects the pumping group from dry running;
will minimize the number of emergency situations;
will provide automatic maintenance of the required technological parameters;
will increase the comfort of operating the system (the user will no longer have to constantly monitor the operation of the equipment).

The device and principle of operation of automation for the pump

General working principle:

when the pressure drops, the unit independently starts the pumping unit (in particular, this happens when the taps are opened);
in the absence of water flow, the electric pump is turned off (all taps are closed);
automatic shutdown of the pumping group can also occur if the fluid flow is not high enough (protection against "dry running").

Specificity of selection and installation of automation for the pump

Installation of the automation unit is carried out in a vertical position in any place located between the pump and the first water distribution point (tap). In this case, the outlet is connected to the pipeline, and the inlet is connected to the outlet of the electric pump.

all hydraulic connections must be tight, the manometer is fastened through the O-ring;
if a pump with a working pressure exceeding the maximum permissible values \u200b\u200bis used, a pressure reduction reducer is installed at the inlet to the unit;
with a high current strength, a magnetic starter is additionally mounted;
for the electrical connection, the diagram shown on the cover of the circuit board is used;
before the first start-up, the suction pipe and the electric pump are filled with water, and only then they are connected to the network;
strictly observe the safety requirements provided by the manufacturer - this will ensure the stable operation of the system, protect against injuries and emergencies, and retain the right to warranty service.

When choosing a pump automation, consider the following technical data.