Weak current College】 【centrifugal refrigerating equipment installation and acceptance.

First, the installation of centrifugal refrigerating equipment, should meet the following requirements:

1. before installing the internal pressure within the unit should be consistent with the relevant equipment technical documentation the technical documentation provided for the factory;

2. refrigeration units with compressor bottom parallel other processing plane alignment level, its vertical and horizontal not horizontal degree is expected to be more than 0.1/1000;

3, centrifugal compressor should be found on the major axis is vertical, horizontal, its not level degrees should not exceed 0.03/1000; in the case of, surface alignment of horizontal levels, it does not level degrees should not exceed 0.1/1000;

4. connect the compressor intake pipe, through the suction port observation guide vanes and executing agencies, and blade opening and meter indicates the location and the relevant equipment technical documentation for adjustment of the consistent, positioning, and then connect electric actuators.

Second, centrifugal refrigerating system commissioning, should meet the following requirements:

1. lubrication system test

Oil pump steering right, should be switched so lubricating oil pump, 8 hours, then take apart and wash oil filter, replace the new oil, running again. Operation of the oil temperature, oil pressure, oil surface height should be consistent with the provisions of the technical file;

2. system tightness test

System after installation, it should be dry air or nitrogen filling system, bringing it in line with the provisions of the technical file, and then use the test pressure of blowing agent checks or in dry air mixed in with the right amount of refrigerant leak detector with halogen. All equipment, pipes, flanges and their joints, without leakage. Test pressure or the recovery unit to produce a small compressor, but must be in strict accordance with equipment technical documentation requirements.

3. running with no load

1) should close compressor suction port-oriented pieces into the valve. The compressor outlet and atmospheric air;

Start the pump 2) to regulate the circulation lubrication system to normal operation;

3) instant start compressor, and observe the steering is correct and that there is no jammed and impact;

4) started again, the compressor for half an hour without running test and observe the oil temperature, oil pressure, friction parts of temperature rise, the machine noise and vibration is normal.

4. vacuum test

The system pressure pumping to remaining is less than 5. 332 kPa (40 mmHg) and maintain a 24 hour, System booster should not exceed 0. 667 kPa (5 mm of mercury). Vacuum, vacuum or used by other system recovery unit in small compressors. Not reach vacuum requirements, should again air tightness test to identify leaks to be repaired, and then again vacuum test until qualified;

5. should the refrigerant to system filling

6, load operation

1) supply of cooling water as required;

Start the pump 2), adjusting the lube system to make it work properly;

3) using the venting device, excluding the air in the system;

4) start the compressor, and according to the machine, the gradual opening of the inspiratory valve and guide vanes, and note the rapid adoption of surge zone, so that the compressor to work properly;

5) minimum load under field conditions and equipment technical documentation requirements determine the desired run time. Operation of the procedure should check the unit noise, vibration, lubrication pressure, temperature, the temperature of the friction parts, motor temperature rise and various instrument instructions, etc., shall be subject to the provisions of the technical file and record the data.