System Design Circulating Fluid Caution Facility Water Caution Communication Caution Series HEB Specific Product Precautions 1 Be sure to read this before handling. Refer to front matter 41 for Safety Instructions and pages 1246 to 1249 for Temperature Control Equipment Precautions. The Japan Refrigeration and Air Conditioning Industry Association JRA GL-02-1994 “Cooling water system . Circulation type . Make-up water” Facility Water Quality Standard . In the case of [MΩ�縦m], it will be 0.003 to 0.01. �� �ｱ: 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. 1. The catalog shows the specifications of the Thermoelectric Bath. 1. Check detailed specifications in the separate “Product Specifications”, and evaluate the compatibility of the Thermoelectric Bath with customer’s system. 2. The Thermoelectric Bath is equipped with a protective circuit independently, but the whole system should be designed by the customer to ensure safety. Warning 1. Avoid using the Thermoelectric Bath in an environment where it could be splashed by fluids (including mist) such as water, salt water, oil, chemicals, or solvents. 2. The Thermoelectric Bath is not designed for clean room usage. It generates dust from the pump inside the tank and the cooling fan in the controller. 3. Low molecular siloxane can damage the contact of the relay. Use the Thermoelectric Bath in a place free from low molecular siloxane. 4. Reserve a space of 50 mm or more at the ventilation hole of the controller. Operating Environment/Storage Environment Warning 1. Do not use fluids other than those described in the specification. Otherwise, the pump will be overloaded and may break. If such a fluid is used, please contact SMC beforehand. 2. The Thermoelectric Bath must not be operated without circulating fluid. The pump breaks by empty driving. 3. The circulating fluid may evaporate, lowering the level in the tank. Significant reduction of the fluid level can break the circulating pump as well as causing the performance to deteriorate. Use with appropriate liquid level at all times. Circulating Fluid Caution 1. The ventilation hole for radiation air must not be exposed to particles and dust as far as possible. 2. Do not let the inlet and outlet for radiation air get closed. If radiation is prevented, the internal power supply will overheat, causing the protective circuit to be activated and stopping the Thermoelectric Bath. 3. If more than one Thermoelectric Bath is used, consider their arrangement so that the downstream sides of the Thermoelectric Bath suck radiation air from the upstream sides. Radiation Air Caution Handling Warning 1. Thoroughly read the Operation Manual. Read the Operation Manual completely before operation, and keep this manual available whenever necessary. 4. The pump can be broken by foreign objects entering the circulating pump. Control to prevent any foreign object from entering the fluid. If the fluid is fluorinated liquid and it is set to a temperature below freezing point, steam from the atmosphere will form ice (frost) when entering the fluid. Be sure to remove this ice (frost) regularly. 5. If water is used for the circulating fluid, set its temperature to over or more 5°C to prevent it from being frozen. 6. Clear Water (as Circulating Water) Quality Standards Standard item Reference item Item pH (at 25°C) Electrical conductivity (25°C) Chloride ion (Cl.) Sulfuric acid ion (SO42.) 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) Unit . [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] Standard value Influence Corrosion Scale generation 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 �ｱ �ｱ �ｱ �ｱ �ｱ �ｱ �ｱ �ｱ �ｱ �ｱ �ｱ �ｱ �ｱ �ｱ �ｱ �ｱ �ｱ 1. The maximum operating pressure of facility water is 0.5 MPa. If this value is exceeded, the internal piping of the tank can break, causing leakage of facility water. 2. Do not supply a flow rate of 8 L/min or more which can break the facility water piping. 3. Appropriate range of the flow rate of the facility water is 3 to 5 L/min. Flow rate higher than this range will not slightly affect the cooling and heating capacity. However, a flow rate below 3 L/min will reduce the cooling and heating capacity significantly. 1. The set value can be written to EEPROM, but only up to approx. 100,000 times. In particular, pay attention to how many of times the writing is performed using the communication function. 1420