Central Air Conditioning Repair and Maintenance

Central air conditioning repair and maintenance, please ask Eurostars for help, which has a professional construction team, with professional construction machinery and equipment, fast door-to-door service, we have the formal qualifications required for the industry, it is your assured choice!

 

[A].Central air conditioning repair and maintenance classification

1. Checkability Maintenance:

-Based on equipment operation and customer needs, there is a planned all kinds of routine inspections;

-On-site guiding the operator's operator, explaining practical technology involving unit operation and maintenance;

-Provide a variety of necessary value-added services;

-Provide professional advice and improvement programs on issues where host and auxiliary equipment run.

2. Preventive Maintenance:

-Including the content provided by inspected maintenance;

-Necessary preventive maintenance according to the recommendation of the manufacturer,

-Preventive maintenance includes cleaning heat exchanger copper tubes, analyzes and replaces refrigerator oil, oil filter, drying filters, etc.

 

3. Comprehensive Maintenance:

-Comprehensive maintenance plan, including all routine inspections, value-added services, and emergency faults;

-In the event of a device failure, it is responsible for all maintenance work and components replacement.

 

4. Emergency Repair:

According to the customer's needs, 24 hours provide customers with emergency maintenance services, developed service networks and high-quality service staff to ensure fast troubleshooting, ensuring short shutdown time.

 

5. Energy Saving Transformation:

Energy-saving renovation refers to the cooling water pump, the cooling fan motor is driven by variable frequency, and realizes the variable frequency speed regulation of the pump and fan according to the temperature change of frozen water, and realizes energy saving.

 

6. Analysis of Refrigeration Oil:

Lubricating oil can fully reflect the internal mechanical operation conditions and operation trend of the compressor, the metal content, humidity and acidity of lubricants, can lead to key indicators of major equipment failures, and we provide professional oil analysis, can be in key moments you propose improvements to eliminate major fault hazards in advance, avoid accidental shutdown and high maintenance costs to protect your investment.

 

7. Cooling tower, water pump, fan coil, fresh air unit, etc. maintenance and transformation.

 

[B]. Central air conditioning system maintenance content

1.Air conditioning host machine part:

-Check the high pressure and low pressure of the refrigerant of the air conditioner host machine refrigeration system are normal or not;

-Check if the air conditioner host machine refrigeration system refrigerant has no leaks, whether it is necessary to supplement the refrigerant;

-Check if the compressor running current is normal;

-Check if the compressor is running normally;

-Check that the working voltage of the compressor is normal;

-Check if the compressor oil level, the color is normal;

-Check if the compressor oil pressure is normal;

-Check that the air conditioner host machine phase sequence protector is normal, there is no shortage;

-Check that the terminals of the air conditioner host machine have no looseness;

-Check if the water flow protection switch is working properly;

-Check if the computer board is checked, whether the temperature of the temperature probe is normal;

-Check if the air conditioner host machine air switch is normal; whether the AC contactor, the heat protector is good.

 

2.The inspection of the air system:

-Check if the air volume of the fan coil is normal;

-Check whether the fan coil return air filter is accumulated as dust;

-Check that the supply air temperature is normal or not.

 

3.The inspection of the water system:

-Check whether the water quality of cooling and frozen water, needs to be replaced or not;

-Check the impurities on the filter of cooling and frozen water system, and clean the filter;

-Check if there is air in the water system, whether to vent it;

-Check whether the water outlet temperature and return water temperature is normal or not;

-Check the pump sound, whether the current is running properly;

-Check if the valve is flexible, there is rusty, there is no leakage, etc .;

-Check the insulation system without cracking, damage, leakage.

[C]Central air conditioning system maintenance regular return visit

1. Learn about the equipment from the engineering department, whether the system has recently run well;

2. Check the operation of the equipment and system; it is determined if there is a fault.

 

[D]Central air conditioning system overhaul content

1. Maintenance in normal operation:

-Check the refrigeration oil pressure and oil volume of the compressor;

-System leak detector (refrigerant), discovery of leakage points in time;

-Check if there is an abnormal sound, vibration and high temperature;

-Check the temperature and pressure of the condenser and the cooler;

-Check if the various valves are normal;

-Check the inlet and outlet water temperature and pressure of the chiller;

-Check the terminals on the main circuit and compact;

-Check the electrical control section;

-Check lubrication system;

-Check the working status of each instrument and controller;

-Keep the equipment in a clean state.

 

2. Maintenance after the annual stop:

-Check and clean drying filter, drying treatment or replacement should be carried out after moisture of the desiccant;

-Check refrigeration equipment safety protection device setting value;

-Check the refrigeration oil pressure and oil volume of the compressor, and make replacement and supplement if necessary;

-Check the insulation of the compressor motor;

-Check and tighten the wire contacts on the circuit;

-Check the electrical control section;

-Provide above content check reports (once a year).

 

3. Terminal maintenance:

-Air handling unit, fan coil unit inspection (once a year).

- Air handling unit, fan coil unit maintenance, refueling (once a year).

-Check, adjust the belt, cleaning the heat exchanger, and clean the filter (at least once a year).

-Clean up the pipeline, dirty remove (at least once a year).

-Cleaning and dust removal of the air handling unit (once a year).

4. Check work content of water system:

-Check of cold water pumps and cooling water pumps, refueling;

-Motors, electrical insulation detection, refueling, inspection and replacement sealing elements;

-Cooling tower general maintenance inspection and maintenance;

-Valves, filters, one-way valves, pressure gauges, thermometer, and replacement repair of water system key parts.

 

5.Cooling tower maintenance:

-Maintenance cooling tower fillings, cleaning, replacement;

-Maintenance cooling tower steel, cleaning, anti-corrosion and replacement;

-Maintenance cooling tower glass steel, cleaning, repair and replacement;

-Maintenance cooling tower fan, motor maintenance, reducer repair, maintenance and replacement;

-Maintenance cooling tower fan in static balance, adjustment;

-Cooling tower collection pool, circulating water pipe repair, cleaning and maintenance;

-Cooling tower demolition;

-Cooling tower structure maintenance, transformation;

-Cooling tower heat performance upgrade;

-Cooling tower noise, vibration repair.

6. Precautions when cooling tower maintenance:

-The V-belt of the blower may be slightly extended at the initial operation, please adjust the belt according to the adjustment essentials, if it is too tight, it will damage the bearing, causing an accident.

-Regularly clean the upper water tank score hole, the lower sink filter.

-Keep the belt is released, and the motor is covered when the cooling tower is paused; When use installed the belt well, lock the nut, and check if there is nest or foreign matter in the cooling tower, then turn it on again.

-Exchange circulating water once a month. (Closed occasions, the circulating water does not have to exchange, but the spread of water needs to be exchanged).

 

7. Precautions when cooling towers winter transportation:

-When the cooling tower stops, pay attention to the discharge of clean circulating water and water in the sprinkler to avoid frozen.

-Closed type cooling tower, please open the drainage valve of circulating water drainage, exhaust port, and water pump.

-To prevent the cooling tower below water tank from freezing, the antifreeze heater is used when the temperature is low.

 

8.Precautions for closed type cooling towers winter transportation:

-Closed type cooling tower Winter use should pay attention to prevent the copper tube (radiator) and freezing of the spread of water.

-To prevent freezing of the cooling tower circulating water, add no frozen solution in the circulating water, or add auxiliary antifreeze electric heater in the pipe.

-After cooling tower plus antifreeze, the freezing temperature drops and is not frozen. The higher the concentration of antifreeze, the lower thr freezing temperature, but the thermal conductivity will decrease, so it should be noted when the cooling tower is used.

-The cooling tower has water leakage or natural losses that require supplementation of water, and the supplementation will dilute the antifreeze, and the freezing temperature rises, please pay attention to the water temperature.

-When the cooling tower circulating pump is running, the antifreeze heating is heated and the water does not freeze. If there is a circulating water pump stop, additionally require auxiliary circulating water pump, here we recommend using a complete set of ant-freezing equipment (including auxiliary circulating water pump, antifreeze electric heater, pipe).

-Circulating water system setting 3 direction valve, in the case where the circulating water is controlled by the bypass tube, if the flow rate of the bypass tube is increased, the flow rate in the copper tube is reduced, which is also a load may also produce freezing. Please set the cooling tower small cycle water.

-In order to prevent freezing of the dispersal-water water pump and the water piping, use a antifreeze to maintain the temperature of the lower sink.