A modern water supply system, especially when it comes to apartment buildings, is far from always able to provide the necessary stable water pressure. In this case, small but multifunctional water pumps that are integrated into the system and the water pressure switch will come to the rescue, due to which the pump is switched on and off periodically.
The principle of operation of almost all water pressure switches is quite simple. The fluid entering the reservoir acts on the valve or membrane. This pushes them to the required distance. When the
pressure decreases
below the set threshold, the relay is activated and the pump starts to function, pumping pressure to the upper set threshold. As soon as the pressure reaches this level, the
water pressure switch trips again and turns off the running pump. The upper threshold at which the water pressure switch will operate can be easily adjusted independently.
The pressure switch is adjusted using special washers and nuts both in the direction of increasing and decreasing pressure. It all depends on what indicator is necessary for a stable pressure of water in the tap. Installation of a water pressure switch is carried out on the accumulator housing, and the best option would be the simultaneous installation of a pressure gauge, which will allow you to control the entire work process and correctly make all the necessary settings.
Given that the water pressure switch has a fairly simple principle of operation, for technical reasons it fails extremely rarely. However, despite the simplicity of work, its quality must comply with established standards. Otherwise, if it fails, it can lead to a breakdown of the accumulator or a pipe break, but, as the worst of all, the motor will simply burn out. One of the weak points of a pressure switch is a valve or diaphragm. Therefore, the first thing to do in the event of a failure is to check the condition of these elements of the device.
Adjustment, as already mentioned above, can be done independently. The main one is carried out using two screws, one of which is responsible for the operation of the device between on-off periods, and the other only for the moment the relay is activated. All adjustment work is carried out only in accordance with the pressure gauge. Greater accuracy is achieved in increments of half or one revolution of the screws. Often, even after adjustment, the desired pressure cannot be achieved. If this happens, then the cause must already be sought in the pump. Sometimes this may be due to the technical capabilities of the relay itself, its operating range. Then either you can independently modify the device, or change to a more advanced model.
The pressure switch must be connected strictly according to the attached diagram. First, the ground terminals are connected, then the network connection, and then the motor connection terminals. With the correct connection and the settings made, you can forget about the water supply system for a long time.