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Special conditions for this systemGo to main contents page
Special conditions for this system
1. TEMPERATURE AND FLOW
The temperature of the water should be between 3°C and 15°C maximum, including the 5°C of fluctuations authorized.
The flow depends on the temperature of the chilled water and on the configuration of the DPS 9000/8xx, i.e. single-, two-, three- or four-processor configuration.
Flow/Temperature Diagram
The flow should be increased by 10% for a 25% ethylene/glycol solution and by 20% for a 50% solution %.
2. CHILLED WATER PRESSURE
The chilled water pressure should not exceed 500,000 Pa (5 kg / cm²). The flow depends on the pressure (see the following figure).
Drop in chilled water flow as a function of the pressure in the CLU
3. QUALITY OF CHILLED WATER
The chilled water should comply with the following specifications:
PARAMETERS LEVELS < or = UNIT Total hardness 200 ppm mg CaCO3 /litre Cl 100 ppm mg C1 /litre SO2 100 ppm mg SO2 /litre NH4 0.2 ppm mg NH4 /litre Alkalinity 100 ppm mg CaCO3 /litre pH 6.2 to 9 / Conductivity 500 µs/cm / Cloudiness 10 NTU /
If the chilled water contains elements which could favour the appearance of rust, a rust inhibitor should be added. For further information on this point, contact Bull's Customer Department.