Facility Water Supply Warning 2. When using tap water as facility water, use water that conforms to the appropriate water quality standards. Use water that conforms to the standards shown below. Tap Water (as Facility Water) Quality Standards The Japan Refrigeration and Air Conditioning Industry Association JRA GL-02-1994 “Cooling water system . Circulation type . Make-up water” Item Unit Standard value Influence Corrosion Scale generation Standard item pH (at 25°C) . 6.5 to 8.2 v v Electric conductivity (25°C) [μS/cm] 100* to 800* v v Chloride ion (Cl.) [mg/L] 200 or less v Sulfuric acid ion (SO4 2.) [mg/L] 200 or less v Acid consumption amount (at pH4.8) [mg/L] 100 or less v Total hardness [mg/L] 200 or less v Calcium hardness (CaCO3) [mg/L] 150 or less v Ionic state silica (SiO2) [mg/L] 50 or less v Reference item Iron (Fe) [mg/L] 1.0 or less v v Copper (Cu) [mg/L] 0.3 or less v Sulfide ion (S2 .) [mg/L] Should not be detected. v Ammonium ion (NH4 +) [mg/L] 1.0 or less v Residual chlorine (Cl) [mg/L] 0.3 or less v Free carbon (CO2) [mg/L] 4.0 or less v * In the case of [MΩ・cm], it will be 0.001 to 0.01. . v: Factors that have an effect on corrosion or scale generation. . Even if the water quality standards are met, complete prevention of corrosion is not guaranteed. 3. Set the supply pressure between 0.3 to 0.5 MPa. Ensure a pressure difference at the facility water inlet/outlet of 0.3 MPa or more. If the supply pressure is high, it will cause water leakage. If the supply pressure and pressure difference at the facility water inlet/ outlet is low, it will cause an insufficient flow rate of the facility water, and poor temperature control. 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 the 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 35°C. When the amount of heat generated from the user’s equipment 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 the machine has stopped, make sure to turn off the breaker of the user’s equipment (on the upstream side). Operation Restart Time Caution 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. Protection Circuit Caution 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 the user’s equipment is too high. �� Ambient temperature is over 45°C. �� Ventilation hole is clogged with dust or dirt. Maintenance Caution Clean the ventilation hole. If the dustproof filter of water-cooled type product becomes clogged with dust or debris, a decline in cooling performance can result. In order to avoid deforming or damaging the dustproof filter, clean it with a long-haired brush or air gun. Inspect the circulating fluid. 1. When using tap water or deionized water �� Replacement of circulating fluid Failure to replace the circulating fluid can lead to the development of bacteria or algae. Replace it regularly depending on your usage conditions. 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 and facility water freezing when the product is stopped, release the circulating fluid and facility water in advance. 2. Consult a professional. This product has an “anti-freezing function”, “warming-up function”, and “anti-snow coverage function”. Read the Operation Manual carefully, and if any additional anti-freezing function (e.g. tape heater) is needed, ask for it from the vendor. Series HRSH Specific Product Precautions 5 Be sure to read this before handling. Refer to the back cover for Safety Instructions. For Temperature Control Equipment Precautions, refer to “Handling Precautions for SMC Products” and the Operation Manual on SMC website, http://www.smcworld.com 34