Trial operation of screw refrigeration unit in clean workshop

Trial operation of screw refrigeration unit in clean workshop

Before the trial operation of the screw refrigeration unit in the clean workshop, there should be no blockage and jamming of the manual compressor, and the power supply of the instrument box should be turned on, and the operation switch should be adjusted to the manual position; the fuel injection valve should be opened 1/5 turn , Open all the oil supply valve, suction valve, exhaust valve and maintenance valve; close...

Text label: Trial operation of clean workshop, screw refrigeration unit

Test run of screw refrigeration unit in clean pharmaceutical cleanroom

Before the trial operation of the screw refrigeration unit in the clean pharmaceutical cleanroom, there should be no blockage and jamming of the manual compressor, and the power supply of the instrument box should be turned on, and the operation switch should be adjusted to the manual position; the fuel injection valve should be opened 1/5 turn , Open all the oil supply valve, suction valve, exhaust valve and maintenance valve; close the manual expansion valve, high and low pressure balance valve and oil return valve; the cooling water, chilled water and oil cooling water in the condenser should be smooth, and the adjustment should be Sensitive; the slide valve should be at zero position, the high and low pressure should be balanced, the lubricating oil surface should be normal, and when the oil temperature is low, the water inlet valve of the oil cooler should be closed, and the electric heater should be connected, so that the oil temperature should not be lower than 30℃; The oil supply temperature is 35-55 ℃, and the oil supply pressure is 0.2-0.3MPa; the manual adjustment four-way valve should be in the position of reducing negative pressure or increasing negative pressure, and check whether the slide valve moves flexibly and correctly, and set the The slide valve is in the position of minimum energy; after the manual operation of the refrigeration unit is normal, it can be put into automatic operation, and the continuous operation time is 8-24H.

After the compressor has been running for a period of time, it should be operated at full load for a short period of time, and the unit should be measured and observed for the pressure of each part, the running current of the motor, the temperature of the main engine body and the bearing, and to monitor whether there is any abnormal sound in the unit operation. . Before the operation of the screw refrigeration unit, disconnect the coupling of the motor and the compressor, and check whether the steering of the motor meets the requirements; after the coupling is reset and connected, it should be adjusted and aligned so that the axes of the compressor and the motor are not coaxial. In accordance with the provisions of the equipment technical documents, it is generally stipulated that the different axis is not more than 0.08mm, and the end face runout is not more than 0.05mm; check the automatic adjustment of the refrigeration system and the reliability of the sensitive action of the safety protection device, and each given parameter value must be set correctly; check; The steering of the oil pump should be rotated in the direction of the arrow shown on the pump body; add lubricating oil according to the lubrication specifications and quantities specified in the equipment technical documents, and keep the oil level at 1/3-1/2 of the oil sight glass. If the requirements are not met, close the relevant valves according to the requirements of the technical documents of the equipment, and open the oil pump to charge the required amount of oil. Zhongjing Global Purification can provide consulting, planning, design, construction, installation, transformation and other supporting services for clean workshops and purification workshops.

The measurement and adjustment of the air volume of the fan and system of the clean pharmaceutical cleanroom should be carried out after the normal operation of the fan and the elimination of defects in the ventilation pipe network. The measurement and adjustment of the air volume of the fan and the system include: value; primary and secondary return air volume; total system supply air volume; fresh air volume and exhaust air volume; indoor positive pressure value;

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