TECHNICAL MANU AL CD 30÷520 06.06 M T E 0 11 2 5 6 ... - Chiller

CD 30 ÷ 520chilled-water or cooled-water near the module.• The water pipeline should be cleaned before connecting to the unit, then dismantle the filter andinstall again. After confirming the water pipeline is clean, the connection can be done.• The soft connector should be used at the inlet (outlet) water pipe to avoid vibration.• To ensure turn on the water pump first and then the unit, the water switch should be installed onthe inlet pipeline and connect its wire to terminal W1 and W2 of main unit.• Water discharge switch should be installed at the outlet pipe, and gas discharge valve shouldbe installed at the inlet water pipe. When the unit works normally, the handler of valve must betaken away to ensure the valve can’t be opened. If the water discharge valve is opened whenthe unit is running, water breaking-off will occur.• The freeze-water pipeline should be covered with adequate heat-insulating material to keep thechilled-water temp. and prevent dewing.• In the cold winter, if the unit stops at night, the water in plate heat exchanger and pipeline mayfreeze, which will damage the device and pipeline. To prevent freezing, it is absolutelyforbidden to switch off the power of the unit (the unit has auto anti-freeze function). If it is stilllikely to freeze, it must drain away all water in the water pipe. If it is difficult to drain water, someanti-freeze mixture such as glycol or propylene glycol can be adopted. Notice: it is absolutelyforbidden to use salt mixture, which would corrode the system and cause damage.• When using industrial water as chilled-water, it seldom scales. However if adopting the waterfrom well or river, it will produce much deposit such as scale and sand. So the water shouldbe filtered and intenerated through some equipment before flowing into the freeze-watersystem. If there is sand or mud deposited in the evaporator, it will jam the flow of chilled-water,which will cause freezing. So it is important to test the water’s PH value, conductivity,concentration of chlorine hydronium, concentration of sulfur hydronium, etc.The following is the standard of water quality:PH value: 6.5~8.0 Total rigidity: