One of the main parts of the pumping station can be considered a water pressure switch for the pump. It allows you to provide automatic shutdown / on, control of water supply on the parameters specifically set by the consumer. Even with a small failure, the functionality of the entire system is disrupted. Any problem with the operation of the sensor is eliminated with the help of a simple adjustment. To understand how to carry out the adjustment, you must first familiarize yourself with the rules for adjusting the water pressure switch for the pump.
The principle of operation and the device of the water pressure switch for the pump
Externally, the relay is a small unit with two springs to adjust the maximum and minimum pressure. Their tension is easily adjusted with special nuts. To transfer the power of water is a membrane. At the minimum rate it weakens the spring, and at the maximum it compresses. Such an impact on the spring causes the closure or opening of the relay contacts. This is how the pump is turned on or off.
The installation of such equipment at the pumping station allows you to maintain the pressure in the water supply system in a given range. The result is a uniform head with the necessary force. Correctly configured level of the upper, also lower bounds of such an indicator ensures periodic shutdown of the pumping station. This contributes to the extension of the service life of the water equipment and its trouble-free operation.
Works pumping station in the following scenario:
- The pump draws water into the existing tank.
- There is an increase in pressure, which can be checked on the pressure gauge.
- After the maximum limit has been reached, the contacts open and the pump is turned off.
- When the water valve is open, the pressure in the system decreases and when it reaches the minimum value, the pumping station automatically switches on.
Continuous and uninterrupted repetition of this cycle is a guarantee of reliable, trouble-free operation of equipment, constant pressure in the plumbing system.
After the pumping station is installed and connected, special attention should be paid to setting the water pressure switch for the pump. The work of the entire system will depend on the accuracy of setting the limit levels.
To do this, first of all, you need to check on what indicators the tank was configured during its manufacture. The standard minimum level is approximately 1.5 atmospheres, and the maximum is 2.5. This can be checked with a conventional mechanical pressure gauge when the tank is empty and the pump is disconnected from the mains. Due to the fact that this device has a metal case, its readings are more accurate than those of fellows made of plastic. To measure the pressure, unscrew the small cap on the body of the empty tank, then connect the pressure gauge and take readings.
Helpful advice! When buying a finished station, such verification may not be required. If the equipment was bought separately (pump, relay, tank), then the initial setting is required.
To set specific values of the pressure level, it is necessary to adjust the pressure switch of the water pump. For this you need to carry out the following manipulations:
- Fill the tank until the pressure gauge shows the required maximum value.
- Turn off the pumping station.
- Opening the relay housing, you need to gradually rotate the small size of the nut until the internal mechanism works. Clockwise rotation – increase in pressure level, against – decrease.
- To set the lower parameter, the water from the tank is gradually drained by opening the tap.
- As soon as the pressure gauge is at the required mark, the descent of the water is stopped.
- To adjust the lower pressure indicator, rotate the large nut, also until the contacts trigger.
Helpful advice! The procedure of checking or setting the level of indicators is recommended not only at the initial setting, but also every month or at least every quarter during the operation.
With a small range between the upper and lower limits of pressure, the pumping station rather pumps up water, creating a constant average level of this indicator in the plumbing system. The water pressure in this case will be uniform, comfortable. If, by means of adjusting the water pressure switch, a wider range is set for the pump, the equipment will be switched on less frequently. With this setting, the station will turn on less frequently and will last much longer.
Helpful advice! When adjusting, it must be remembered that the minimum difference between the lower and upper limits may be at least 1 atmosphere.
Quite frequent cause of damage during operation of pumping stations is the lack of water in the system. The load on the pump, carried out without water, leads to the deformation of the internal parts and the failure of all equipment.
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Lack of fluid in the system may be due to the following reasons:
- fluid consumption is significantly greater than the volume of the well or borehole;
- interruptions in the supply of water in the summer;
- accidents on plumbing systems.
To protect against such troubles, there are relays with protection against dry running. Such equipment provides for the possibility of opening the contacts, at which the pump is completely disconnected. Usually this indicator is set by the plant at about 0.5 atmospheres and is not subject to adjustment. Start the engine of the pumping station will be possible only when the normal amount of water in the system is restored.
Also, manufacturers can offer another type of protective equipment. The flow switch, supplemented by the functions of a pressure switch, also effectively protects against breakages in the absence of water. This sensor shuts down the system in the absence of flow or a drop in pressure less than 1 atmosphere.
Helpful advice! When adjusting the water pressure switch for the pump, remember that the power of the station itself declared by the manufacturer. If the station can not produce water pressure more than 5 atmospheres, then there is no point in adjusting it to a large point.