Since most of the air-cooled chiller units are placed outdoors, the temperature is lower than that in the room. For the air-cooled chiller, there is no cooling water circulation system. Therefore, anti-freezing of the fan should be increased, and proper lubricating oil should be added.
If not used for a long time, the air cooling unit should be cleaned, coated with protective oil, and placed in frostbite unit; Intermittent use, to ensure that enough water flow and water pressure in the system, not the internal water freeze damaged units.
Although the water cooling unit is generally located in the indoor or underground machine room, the ambient temperature is slightly higher than that of the air cooling unit, but the water cooling unit relies on the water circulation to transfer heat, rather than the fan to dissipate heat, so the pipes and systems involved in the water, should make adequate anti-freezing measures.
Water cooling unit to do antifreeze, one is to add the right amount of antifreeze, because the content of antifreeze is too high and too low, will bring harm to the system, add less great antifreeze effect, add more will cause corrosion of the pipe, pipe wall, tower body.
Second, it is necessary to pay attention to the refrigerant and refrigerant. The properties of refrigerant may change under too low temperature, and the viscosity of refrigerant will increase due to too low temperature, thus causing the running wear of the compressor. So pay attention to the condition of frozen oil and refrigerant in winter.
In the case that the environment temperature drops below 0 degrees in winter and the chiller is not used for a long time, the equipment should be drained in time, and the chiller, pipe, water pump, chiller tower, valve and connection part should be drained out to prevent the water from freezing and damaging the equipment.
The following is a series of Kaidli combined with the department of equipment, the summary of drainage methods:
2, the evaporator, the evaporator over the drain valve open, drain water, it is best to open the drain valve in the normal, the next year boot off.
3, water pump and pipe, water pump and pipe should be at the lowest place to remove water.
4, the cooling tower, the cooling tower water tray drain valve open, to expel water.
5. At the end, the blowdown valve at the bottom of the coil is opened to remove water and is in the normal open state. It will be closed next yea1. Condenser: Open the end cover of the condenser to remove the internal water.