What is the maintenance method of hotel central air conditioning?

1, maintenance and inspection of normal operation of central air conditioning chiller

Check the oil pressure and oil quantity of compressor refrigeration oil, detect the leakage (refrigerant) in the system, and handle it in time if found.

Check for abnormal sound, vibration and high temperature.

Check the temperature and pressure of condenser and cooler.

Check whether all valves are normal.

Check the temperature and pressure of water inlet and outlet of water chiller.

Check whether the terminals on the main circuit are loose and tight.

Check whether there is any abnormality in the electrical control part; Check the working state of each instrument and controller.

Check whether the lubricating system oil of the unit is sufficient.

Check the setting value of the safety protection device of refrigeration equipment.

Check the oil pressure and oil quantity of compressor refrigerant oil, and replace the refrigerant oil and supplement the insulation of compressor motor if necessary.

Check and tighten the wire contacts on the circuit.

Check whether there is air in the refrigeration system, and if there is air, exhaust it.

2, central air conditioning condenser evaporator maintenance

A) prepare 10% hydrochloric acid solution (0.5g corrosion inhibitor is added to each 1kg acid solution);

B) Dismantle the water inlet and outlet flanges at both ends of the condenser and evaporator and seal them, then inject acid solution, and the pickling time is about 24 hours. The acid pump can also be used for circulating cleaning, and the cleaning time is about 12 hours;

C) After pickling, rinse with 1% NaOH solution or 5%Na2CO3 solution for 15 minutes, and finally rinse with clear water for more than 3 times;

D) After all cleaning, check whether there is water leakage. If there is water leakage, apply for outsourcing maintenance; If there is no water leakage, reinstall it (if the flange sealing rubber gasket is aging, it should be replaced).