Standard item Reference item Item Unit Standard value Influence Corrosion Scale generation �ｲ �ｲ �ｲ �ｲ �ｲ �ｲ �ｲ �ｲ �ｲ �ｲ �ｲ �ｲ �ｲ �ｲ �ｲ �ｲ �ｲ . In the case of [MΩ・cm], it will be 0.003 to 0.01. . �ｲ : 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. Series HRS Specific Product Precautions 1 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 Design Warning 1. This catalog shows the specifications of a single unit. 1) Confirm the specifications of the single unit (contents of this catalog) and thoroughly consider the adaptability between the customer’s system and this unit. 2) Although the protection circuit as a single unit is installed, prepare a drain pan, water leakage sensor, discharge air facility, and emergency stop equipment, depending on the customer’s operating condition. Also, the customer is requested to carry out the safety design for the whole system. 2. When attempting to cool areas that are open to the atmosphere (tanks, pipes), plan your piping system accordingly. When cooling open-air external tanks, arrange the piping so that there are coil pipes for cooling inside the tanks, and to carry back the entire flow volume of circulating fluid that is released. Selection Warning 1. Model selection For selecting a model of Thermo-chiller, it is required to know the heat generation amount of a customer’s machine. Obtain the heat generation amount, referring to “Cooling Capacity Calculation” on pages 1308 and 1309 before selecting a model. Handling Warning 1. Thoroughly read the Operation Manual. Read the Operation Manual completely before operation, and keep this manual available whenever necessary. Operating Environment/Storage Environment Warning 1. Do not use in the following environment because it will lead to a breakdown. 1) Environment like written in “Temperature Control Equipment Precautions”. 2) Locations where spatter will adhere to when welding. 3) Locations where it is likely that the leakage of flammable gas may occur. 4) Locations having a large quantity of dust. 5) A location in which water freezes. If such a location is unavoidable, please contact SMC. 2. Install in an environment where the unit will not come into direct contact with rain or snow. These models are for indoor use only. Do not install outdoors where rain or snow may fall on them. Operating Environment/Storage Environment Warning 3. Conduct ventilation and cooling to discharge heat. (Air-cooled refrigeration) The heat which is cooled down through air-cooled condenser is discharged. When using in a room which is shut tightly, ambient temperature will exceed the specification range stipulated in this catalog, which will activate the safety detector and stop the operation. In order to avoid this situation, discharge the heat outside of a room by ventilation or cooling facilities. 4. The product is not designed for clean room usage. It generates particles internally. Circulating Fluid Caution 1. Avoid oil or other foreign objects entering the circulating fluid. 2. When using clear water as a circulating fluid, use water that conforms to the appropriate water quality standards. Use water that conforms to the standards shown below (including water used for dilution of ethylene glycol aqueous solution). The Japan Refrigeration and Air Conditioning Industry Association JRA GL-02-1994 “Cooling water system . Circulation type . Make-up water” Clear Water (as Circulating Fluid) Quality Standards 3. Use an ethylene glycol aqueous solution that does not contain additives such as preservatives. 4. When using ethylene glycol aqueous solution, maintain a maximum concentration of 15%. Overly high concentrations can cause a pump overload. Low concentrations, however, can lead to freezing when circulating fluid temperature is 10°C or lower and cause the Thermo-chiller to break down. 5. A magnet pump is used as a circulating pump for circulating fluid. It is particularly impossible to use liquid including metallic powder such as iron powder. 6.0 to 8.0 100. to 300. 50 or less 50 or less 50 or less 70 or less 50 or less 30 or less 0.3 or less 0.1 or less Should not be detected. 0.1 or less 0.3 or less 4.0 or less pH (at 25°C) Electrical conductivity (25°C) Chloride ion (Cl.) Sulfuric acid ion (SO4 2.) Acid consumption amount (at pH4.8) Total hardness Calcium hardness (CaCO3) Ionic state silica (SiO2) Iron (Fe) Copper (Cu) Sulfide ion (S2 .) Ammonium ion (NH4 +) Residual chlorine (Cl) Free carbon (CO2) . [μS/cm] [mg/L] [mg/L] [mg/L] [mg/L] [mg/L] [mg/L] [mg/L] [mg/L] [mg/L] [mg/L] [mg/L] [mg/L] 1310