Color of the dew point indicator Note There are both white and pink grains. Air flow rate etc. can be outside of the specifications. Contained oils can lower the performance. Performance state White/Pink Blue White/Pink Brown/Black Initial state Normal operating Decrease in performance Series IDG�ｮA/IDG Specific Product Precautions 3 Be sure to read before handling. Refer to back cover for Safety Instructions and “Handling Precautions for SMC Products” (M-E03-3) for Air Preparation Equipment Precautions. Maintenance Maintenance Caution Warning Caution 1. Do not remove the parts or piping when in a pressurized state. Never remove them while under pressure, as this could cause dangerous situations. 3. Element replacement period Refer to the following guide when replacing the elements in the mist separator and in the micro mist separator, or micro mist separator with prefilter that are installed on the inlet side of the membrane air dryer. 1) When two years have passed since installation. 2) When the unit’s pressure drop reaches 0.2 MPa, even before the two year period is reached. 3) When the red portion of the element service indicator reaches the upper limit. (With micro mist separator with pre-filter) [IDG60M to IDG100M, IDG60HM to IDG100HM, IDG60V to IDG100V, IDG60HV to IDG100HV] Note) Note) For other models as well, they are available with the element service indicator under made-to-order. Refer to pages 33 and 34. 4. Membrane module replacement period Replace the membrane module when the color of the dew point indicator turns white or pink. As a guideline, unit should be replaced after approximately 10 years of use (10 hours/day operation). Replace it when the color of the dew point indicator turns white or pink, even if it is within the period. 5. Tightening torque for installing the membrane module and the case (for IDG5, 10, 20, 5H, 10H, 20H) Use caution not to tighten excessively. It may result in a breakdown of membrane module, case and mounting screws or insufficient sealing. (Check the tightening torque range in the Operation Manual.) 6. Installing a pressure gauge A pressure gauge should be installed on the inlet and outlet sides of the membrane air dryer (unit) for the maintenance and inspection purposes. Metrology (Measurement) Law Caution 1. SMC products are not intended for use as instruments for legal metrology. Measurement instruments that SMC manufactures or sells have not been qualified by type approval tests relevant to the metrology (measurement) laws of each country. Therefore, SMC products cannot be used for business or certification ordained by the metrology (measurement) laws of each country. 1. Check the dehumidification function with the dew point indicator. Observe the color of the dew point indicator to confirm whether the membrane air dryer is functioning normally. [When dew point indicator color is blue: Functioning normally] [When dew point indicator color is pink: Dew point temperature is high. (Outlet air is humid.) Note: Atmospheric pressure dew point approximately .10°C minimum] If humid air flowing in turns the color pink, and then if dry air enters, the color turns back to blue. It takes about 1 hour from the start of air flow for the dew point indicator color to change. 2. Dew point indicator replacement period The absorbent is used in the dew point indicator. It absorbs the gasified oil in the compressed air and/or the gaseous elements other than the air, and then may turn brown. When it turned brown, replace the dew point indicator. Besides, in the event of replacing them periodically, carry out after two-year operation as a guideline. (For the part number of the dew point indicator, refer to pages 10 and 11.) Operating Environment Caution 1. Do not use at temperatures (fluid or ambient temperatures) higher than the prescribed operating conditions. Resin is used in the membrane module, and it can be damaged by operation at high temperatures. Especially when installed immediately after a reciprocating type air compressor, confirm that the fluid temperature does not exceed the range of operating conditions during use. 2. Keep the inlet air temperature lower than the ambient temperature. If the membrane air dryer body is cooled by the surrounding air, water drops may accumulate inside and reduce its dehumidification capacity. 47