4. Take measures to prevent drainage from accumulating in the piping. Design the piping so that a drain relief is provided at the bottom of a riser pipe, or a slight taper is provided along the flow to prevent the drainage from accumulating. 5. Verify the IN and OUT sides. When connecting the piping, avoid interchanging the water and air sides as well as the IN and the OUT sides. Wiring Warning 1. Installing ground To operate air preparation equipment that uses electricity (such as an air-cooled aftercooler or air dryer), install on the power supply side a leakage breaker with an appropriate leakage sensitivity and load capacity to prevent electric shocks or motor damage. Verify the breaker specifications in this manual or in the operation manual. 2. Verify the power supply voltage. Operating the equipment with a voltage that is out of specification could lead to a fire or an electrical shocks. Verify the power supply and the voltage before wiring. The voltage fluctuation must be within ±10 of the specified value. 3. Handle the wires carefully. To prevent fire or electric shocks, do not bend, twist, or pull on the power supply cords or wires. 4. Wire with appropriate size terminal. When connecting a power supply cord to equipment with a terminal box, use a terminal applicable to the terminal box. If an incorrect terminal size is used, it may cause a fire. 5. Have the wiring done by a qualified professional. Only a qualified professional should carry out wiring work such as mounting the breaker, wiring the breaker to other equipment, or connecting to the terminal block. Piping Caution 1. Refer to the Fittings and Tubing Precautions (pages 44 to 47) for handling One-touch fittings. 2. Preparation before piping Before piping is connected, it should be thoroughly blown out with air (flushing) or washed to remove chips, cutting oil and other debris from inside the pipe. 3. Wrapping of pipe tape When screwing piping or fittings into ports, ensure that chips from the pipe threads or sealing material do not enter the piping. Also, if pipe tape is used, leave 1.5 to 2 thread ridges exposed at the end of the threads. Winding direction Pipe tape Expose approx. 2 threads Air Preparation Equipment Precautions 2 Be sure to read this before handling. Wiring Caution 1. Installing ground To operate air preparation equipment that uses electricity (such as an air-cooled aftercooler or air dryer), provide a ground connection to prevent earth leakage. Do not connect the ground wire to a water pipe or a gas pipe due to a risk of explosion. 2. Verify the color of the wires and terminal numbers before wiring. Before connecting the wires, verify the color of the wires and terminal numbers in the operation manual or on the electrical wiring diagram name plate. Improper wiring could cause the electrical parts to become damaged, malfunction, or operate improperly. 3. Precautions for connecting a 3-phase power supply Make sure to correctly connect the R, S, and T terminals to an equipment that uses a 3-phase power supply. If the terminals are connected improperly, the fan of the air-cooled after cooler will rotate in reverse, and the refrigerated air dryer will not operate because the reverse phase relay will trip. In such cases, interchange two of the three power supply wires (except IDF370B). Air Supply Warning 1. Type of fluids Please consult with SMC when using the product in applications other than compressed air. Caution 1. Do not use compressed air that contains chemicals, organic solvents, or corrosive gases. Do not use compressed air that contains chemicals, organic solvents, salt, or corrosive gases as it can cause damage or malfunction. 37