The vacuum degree of the chiller is generally controlled at about 300Pa, but the specific vacuum degree needs to be determined according to the actual situation and use scenarios. The ideal vacuum should be (5-50)*10^-4Pa. Also, note that the residual pressure within the system should be less than 5.332 kPa.
Under vacuum conditions, the working environment of the oil pump is poor, so it is necessary to pay attention to the change of compressor oil pressure. According to the requirements, the difference between the oil pressure and the suction pressure should not be less than 26.6kPa. At the same time, the normal value of vacuum low pressure of chiller is generally between 5-10mmHg. If the vacuum low pressure value is too high or too low, it will affect the normal operation of the chiller.
The above information is for reference only, and the specific vacuum pressure should be determined according to the model and specifications of the chiller and the manufacturer’s recommendations. In actual operation, the operating procedures should be strictly followed, and the equipment should be regularly inspected and maintained to ensure its normal operation and extended service life.
What are the common fault phenomena and solutions of chillers?
Common chiller fault phenomena and solutions include:
The chiller power indicator does not light up
It may be that the fuse is not installed or the power supply is connected incorrectly. The workaround is to install the appropriate fuse and check for power wiring issues.
Turn on the power switch and the water pump switch and burn the fuse:
it may be a short circuit fault or the water pump rotor is stuck. The solution is to check the control wires and main power cords, and loosen the motor rotor with a screwdriver.
The water pump overload protector jumps away automatically:
the current limit of the protector can be appropriately adjusted within the allowable range and the reset button can be pressed.
Compressor failure
It could be an open compressor coil, a short circuit, or compressor frosting. The solution is to replace the matching compressor, check whether the circulating water pipeline is unblocked, and increase the diameter of the circulating water pipeline to ensure the normal water circulation.
The temperature display of the thermometer jumps up and down
it may be that the thermometer is out of control. The solution is to replace the temperature control meter.
Low pressure failure
It may be a lack of refrigerant or a leak in the pipeline. The solution is to supplement the refrigerant or weld after the leak detection.
Industrial chiller system leakage refrigerant
first check whether the low pressure gauge of the industrial chiller has pressure, if there is no pressure, it means that the refrigerant is leaking, you need to check the leakage, check the connection of each copper pipe, and see which position is the leakage of the refrigerant.
Industrial chiller compressor is broken
The machine shows that the compressor is faulty. Use the clamp meter to clamp the three wires of the compressor to get the working current, if the three are different, the preliminary judgment is that the compressor is bad. The solution is to replace the compressor of the industrial chiller.
Overload of the industrial chiller cooling system
In the process of using the industrial chiller, the temperature can not reach the predetermined effect, or the temperature does not drop, but will rise, indicating that the power of the optional industrial chiller is not large enough, and the solution is to replace the larger industrial chiller to achieve the temperature of the water required in the production process.
The above information is for reference only, when the chiller fails, it is recommended to contact professional maintenance personnel for inspection and maintenance. At the same time, regular service and maintenance of the chiller is also very important to reduce the occurrence of failures and extend the service life of the equipment.
