Circulating Fluid Caution 1. Avoid oil or other foreign objects entering the circulating fluid. 2. When water is used as a circulating fluid, use tap water that conforms to the appropriate water quality standards. Use tap water that conforms to the standards shown below (including water used for dilution of ethylene glycol aqueous solution). Tap Water (as Circulating Fluid) 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) . 6.0 to 8.0 v v Electric conductivity (25°C) [mS/cm] 100* to 300* v v Chloride ion (Cl.) [mg/L] 50 or less v Sulfuric acid ion (SO4 2.) [mg/L] 50 or less v Acid consumption amount (at pH4.8) [mg/L] 50 or less v Total hardness [mg/L] 70 or less v Calcium hardness (CaCO3) [mg/L] 50 or less v Ionic state silica (SiO2) [mg/L] 30 or less v Reference item Iron (Fe) [mg/L] 0.3 or less v v Copper (Cu) [mg/L] 0.1 or less v Sulfide ion (S2 .) [mg/L] Should not be detected. v Ammonium ion (NH4 +) [mg/L] 0.1 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 0.003 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. 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. When deionized water is used, the electric conductivity should be 1 μS/cm or higher (Electric resistivity: 1 MW・cm or lower). Facility Water Supply Warning 1. The water-cooled refrigeration type thermo-chiller radiates heat to the facility water. Prepare the facility water system that satisfies the heat radiation and the facility water specifications below. L Required facility water system Model Heat radiation [kW] Facility water specifications HRSH100-Wl-l Approx. 20 Refer to "Facility water system" in the specifications on pages 12 and 14. HRSH150-Wl-l Approx. 27 HRSH200-Wl-l Approx. 34 HRSH250-Wl-l Approx. 40 Warning Grounding should never be connected to a water line, gas line or lightning rod. Caution 1. Power supply and communication cables should be prepared by user. 2. Provide a stable power supply which is not affected by surge or distortion. If the voltage increase ratio (dV/dt) at the zero cross should exceed 40 V/200 msec., it may result in malfunction. < For 400 V type and option B [With earth leakage breaker]> 3. This product is installed with a breaker with the following operating characteristics. For the user’s equipment (inlet side), use a breaker whose operating time is equal to or longer than the breaker of this product. If a breaker with shorter operating time is connected, the user’s equipment could be cut off due to the inrush current of the motor of this product. dV dV dt dt = Voltage increase ratio Time Voltage 4 h 2 h 1 h 30 min 20 min 14 min 10 min 6 min 4 min 2 min 1 min 30 s 20 s 10 s 5 s 2 s 1 s 0.5 s 0.2 s 0.1 s 0.05 s 0.02 s 0.01 s 100 135 200 300 400 500 600 700 1000 1500 2000 3000 4000 Current (% for chiller main breaker volume) Operating time Min. Max. Electrical Wiring Series HRSH Specific Product Precautions 4 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 33