Operation Warning 1. Confirmation before operation 1) The fluid level of a tank should be within the specified range of “HIGH” and “LOW”. When exceeding the specified level, the circulating fluid will overflow. 2) Remove the air. Conduct a trial operation, looking at the fluid level. Since the fluid level will go down when the air is removed from a user’s piping system, supply water once again when the fluid level is reduced. When there is no reduction in the fluid level, the job of removing the air is completed. Pump can be operated independently. 2. Confirmation during operation �� Check the circulating fluid temperature. The operating temperature range of the circulating fluid is between 5 and 40°C. When the amount of heat generated from a customer’s machine is greater than the product’s capability, the circulating fluid temperature may exceed this range. Use caution regarding this matter. 3. Emergency stop method �� When an abnormality is confirmed, stop the machine immediately. After pushing the [OFF] switch, be sure to turn off the power switch. Facility Water Supply Warning (Water-cooled refrigeration) 1. Supply pressure of 0.5 MPa or less. If the supply pressure is high, it will cause water leakage. 2. Be sure to prepare your utilities so that the pressure of the Thermo-chiller facility water outlet is at 0 MPa (atmospheric pressure) or more. If the facility water outlet pressure becomes negative, the internal facility water piping may collapse, and proper flow control of facility water will be impossible. Using deionized water as facility water may cause problems such as clogging in the piping due to metal ion. Operation Restart Time Caution 1. Wait five minutes or more before restarting operation after it has been stopped. If the operation is restarted within five minutes, the protection circuit may activate and the operation may not start properly. Series HRS Specific Product Precautions 2 Be sure to read this before handling. Refer to front matter 41 for Saftey Instructions, pages 1246 to 1249 and the Operation Manual for Temperature Control Equipment Precautions. The Operation Manual can be downloaded from the SMC website: http://www.smcworld.com Maintenance Caution 1. Clean the ventilation hole If the fin portion of the air-cooled condenser becomes clogged with dust or debris, a decline in cooling performance can result. In order to avoid deforming or damaging the fin, clean it with a long-haired brush or air gun. 1. Inspect the circulating fluid. 1) When using clear water . Replacement of clear water Failure to replace the clear water can lead to the development of bacteria or algae. Replace it regularly depending on your usage conditions. . Tank cleaning Consider whether dirt, slime or foreign objects may be present in the circulating fluid inside the tank, and carry out regular cleanings of the tank. 2) When using ethylene glycol aqueous solution Use a concentration meter to confirm that the concentration does not exceed 15%. Dilute or add as needed to adjust the concentration. 1. Make water-removal arrangements beforehand. If there is a risk of the circulating fluid freezing when the product is stopped, release the circulating fluid in advance. 2. Consult a professional. For additional methods to prevent freezing (such as commercially available tape heaters, etc.), consult a professional for advice. Caution 1. If operating in the below conditions, the protection circuit will activate and an operation may not be performed or will stop. . Power supply voltage is not within the rated voltage range of ±10%. . In case the water level inside the tank is reduced abnormally. . Circulating fluid temperature is too high. . Compared to the cooling capacity, the heat generation amount of a customer’s machine is too high. . Ambient temperature is too high. (40°C or higher) . Refrigerant pressure is too high. . Ventilation hole is clogged with dust or dirt. Protection Circuit 1311 HRG HRS HRZ HRZD HRW HEC HEB HED HEA IDH