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APPLICATION : PS1050A pressure switch is used to detect the pressure of city gas, natural gas, LPG and air etc. When the gas pressure changes, the diaphragm of the pressure receiving part detects it and operates the (SPDT) switch to ON/OFF control of the external electrical circuit. These switches are widely used to detect the upper limit or lower limit pressure of gas or air to be supplied to a gas burner. Model Selection: ModelPressure Range(mbar)nominal operating differential(mbar)Maximum working pressure (mbar)PS0212A2...12<2300PS1050A 10...50<10300 PS3015A 30...150<20500 Technical Data: Dimensions: see Fig.1 Connection: G1/4'' Set point accuracy:15% of the full scale NOTE: the knob readings are approximations of the actual settings. Contact ratings: Resistive load: 220Vac, 5A; Inductive load: 220Vac, 3A; Material of pressure receiving parts: NBR single diaphragm Material of housing:Aluminium die-cast. Ambient temperature range:-15°C - 60°C; Relative humidity:max.90% at 40C(non-condensing) Electrical connection:Plug connection accordingtothree pin plug connector("DIN plug") Sensed medium temperature range: -15°C- 80°C; Enclosure: IP54. Working Principle: The PS pressure switch is used to testing the pressure changing in the gas pipe or air pipe. When the pressure rises, and higher than the set point, terminals between COM and NO is closed, COM and NC opened. When the pressure falls, and low than the set point, terminals between COM and NC is closed, COM and NO opened. The feature of the pressure switch can be used to insure the burner working in the safety station. Installation: – Read these instructions carefully. Failure to follow the instructions could damage the product or cause a hazardous condition. – Check the ratings given in the instructions and on the product to make sure the product is suitable for your application. – The installation has to be carried out by qualified person only – Carry out a thorough checkout when installation is completed. – Electrical installation must be in accordance wth local requirements. Connect the pressure switch onto the pipe: 1. Remove the dust seal from the pressure inlet. 2. Apply a moderate amount of good quality compound to the pipe for fitting only, leaving the end thread. The pipe thread should be G1/4” . Please see fig.1-3 as reference. 3. Screw the pressure switch onto the pipe, using wrench boss incorporated in the housing. 4. Complete the electrical connections as instructed in the electrical connections section. Please see fig.1-2 as reference.