IDF55E, 75E Compressed air outlet Compressed air inlet Valve open Valve closed . When tightening the inlet/outlet air piping, firmly hold the hexagonal parts of the port on the air dryer side or piping with a wrench or adjustable angle wrench. . Variations in operating conditions may cause condensation to form on the surface of the outlet piping. Apply thermal insulation around the piping to prevent condensation from forming. . Check that vibrations resulting from the compressor are not transmitted through the air piping to the air dryer. . Do not allow the weight of the piping to lie directly on the air dryer. . Be careful to avoid an error in connecting the air piping at the compressed air inlet (IN) and outlet (OUT). . Install bypass piping since it is needed for maintenance. Air Piping Caution IDF4E to 15E1 IDU3E to 15E1 IDF22E, 37E IDU22E to 75E IDF1E to 3E Compressed air inlet Compressed air outlet Valve closed Valve open Compressed air inlet Compressed air outlet Valve closed Valve open Compressed air inlet Valve open Compressed air outlet Valve closed When the air dryer is operated in the following cases, which will activate the protection circuit and turn off the lamp, the air dryer will come to stop. . The compressed air temperature is too high. . The compressed air flow rate is too high. . The ambient temperature is too high. (40°C or higher (IDF100F to 150F: 45.. or higher)) . The fluctuation of the power supply is beyond the rated voltage ±10%. . The air dryer is drawing in high temperature air exhausted from an air compressor or other dryer. . The ventilation port is obstructed by a wall or clogged with dust. Protection Circuit Caution Series IDF/IDU Specific Product Precautions 2 Be sure to read the below before handling. Refer to pages 6 to 8 for Air Preparation Equipment Precautions. Use the bypass piping set on pages 61 and 62. 66