The amount of cooling capacity of the screw chiller is directly related to the energy consumption and operational economics of the entire unit, which is worthy of attention. Especially when designing a cold station, there is no single chiller in the general situation. This is mainly because when the screw chiller fails or is shut down for maintenance, it will not stop production. Instead, the reasonable unit should be selected according to the production situation. The number of units. When the water is filled, install the high-level automatic deflation valve, and only the vent valve of the vent valve of the pump outlet pipe (hereinafter referred to as the spout) is not installed.
When the water pump is turned on, the water flow at the spout is in the state of a musical fountain. The high and low jets slowly bring out the air in the system. As the jet flow becomes higher and more stable, the air in the system is cleaned. When the screw chiller has a flow of up to 6 meters, it will end when the nozzle is no longer dropped. Close the valve at the spout, the pressure at the outlet of the pump is 0.25 MPa, and the chiller is turned on smoothly.
LNEYA screw chiller observes Y-Δ time delay relay, the correct value is 3.5 seconds, the simulation runs, the starting load sequence is: 25% solenoid valve - liquid supply valve, compressor (simultaneous) --50% solenoid valve - 75% electromagnetic Valve - 100% solenoid valve. Observe the Y-Δ start delay time, such as too long or too short, to adjust. Stop process: 100% solenoid valve - 25% solenoid valve - liquid supply valve, compressor (simultaneous) stop. The high and low jets slowly bring out the air inside the system as the jet is getting higher and higher and more stable.
It shows that the air in the system is more clean. When the water flow in the nozzle is as high as 6 meters and no longer falls, the jet will end. Close the valve at the spout, the pressure at the outlet of the pump is 0.25 MPa, and the chiller is turned on smoothly. Thorough inspection of the closed pressure test object: whether the support hanger is stable and firm; whether the connection work of the pipeline has been completed and passed the inspection; the joint of the screw chiller and other parts to be inspected are not painted and insulated; the elevation of the pipeline The slope should be checked and passed. The pressure test table must be inspected.