You will need
- - technical documentation to the pump;
- - pressure gauge;
- - screwdriver.
Turn on the pump. Built-in manometer, determine the pressure on and off the station. Record the results of measurements.
Disconnect the pump power. Remove the top protective cover of the pressure switch by loosening the mounting screw. Under the hood there are two screws of different sizes. The top screw is marked "P" and is used to control the turn-on pressure. Turn the screw in the desired direction indicated by the sign "+" or "-". If the pressure required to increase the rotation of the implement in the direction of the " + " sign to reduce the parameter in the direction of "-". To determine the amount of change in pressure, simply turn the screw one turn.
After the initial adjustment, start the pump and see at what pressure level will start the system. Write the data off and on again the pump. If necessary, an additional adjustment, governov screw in the desired direction. Until the pump was switched on when reaching a certain pressure level in the system.
Proceed to the second screw, which is responsible for the difference between the pressure of off and on. Usually it is marked "DR" and the same arrow with the signs "+" and "-". The method described above, adjust the system settings. Normally, the difference between the two types of pressure must be in the range of from 1.0 to 1.4 bar. The higher the system pressure, the greater may be the allowable difference.
Final data about the regulated system register in special magazine. Check the parameters set with a valid passport values. For example, if a pump station, taking into account all possible losses may issue technical conditions is not more than 3.2 bar, it is useless to configure the relay off when the system pressure is 3.9 bar.
At the end of the adjustment secure the protective cover to its place and secure it with the screw.