1. Reasons for water treatment of central air conditioners
Central air conditioning system is divided into cooling part, frozen part, heat exchange part, air conditioning condensate , corresponding water systems are circulating condenser system, refrigerated water-heating water system, and water connection tray. The water system of central air conditioners has its own characteristics, but there are the same problems: when external market conditions change (temperature, flow rate), scale, corrosion, biological sludge and other phenomena will occur. If does not perform proper water treatment, it will inevitably cause pipeline blockage, corrosion leakage, and reduced operating efficiency, which will affect the long-term normal operation of the entire central air conditioner system.
According to the air conditioning system, scale and oxygen corrosion failures must be cleaned and descaled regularly and daily water quality treatment must be treated. Safe and effective chemical cleaning can achieve safe and normal operation and significantly improve the cooling capacity or heating efficiency. After cleaning, the system runs cost . It inhibits corrosion and scale, and protects the host and pipeline network from corrosion after the corrosion pre-film. no longer produces scale, extending the service life of the unit. This is the fundamental purpose of central air conditioners for water treatment.
2. Host cleaning method
3. Cooling water system cleaning process
. Add cleaning descaling agent to the tower, and turn on the pump to cycle for 16-24 hours. The agent can penetrate and wet the inside of the dirt, making the greasy dirt easy to fall off, and the dirt, scale, rust, mud, etc. will be taken away with the running water to achieve the purpose of cleaning.
4. Discharge cooling water, clean the cooling tower, disassemble the Y-shaped filter in the cooling system room, clean the debris in the filter net and add clean cooling water.
5. Add prefilm agent to the cooling tower. After the first 2 steps of cleaning, the system will prevent the metal surface from being corroded. Control the pH value between 5.5-6.5 and discharge after 24 hours of operation.
6. Daily maintenance, the concentration of the agent is determined by analysis and monitoring based on the specific water quality, so as to maintain and repair the protective film formed on the metal surface in the system, so as to achieve the purpose of anti-corrosion, anti-scaling and controlling the growth of microorganisms.
4. Refrigerated water system cleaning process
. Discharge frozen water and discharge the cleaned rust slag and sludge out of the freezing system. Remove the filter of the main pipe of the refrigeration system room, remove the debris in the filter, seal the filter, and inject water into the system until the refrigerated water is full. Turn on the refrigeration pump and circulate for half an hour. Stop the pump and drain the entire system. After draining, inject it. Flush it repeatedly until the water is clear and transparent.
4. The external water pump adds pre-film liquid from the sewage outlet. After cleaning the system, its metal surface is in a very active state and is easily secondary oxidized. Therefore, the system should be pre-filmed to prevent the metal surface from being corroded.Add prefilm agent to control the pH value between 5.5 and 6.5, and release it after running for 24 hours.
5, discharge 2/3 of frozen water, add corrosion inhibitor from the sewage outlet, and turn on the pump to circulate for 2 hours to make the medicine evenly distributed in the system. Test the pH value, and the normal pH value is between 8 and 10 for dipping tablet test.
Air-cooled host cleaning: The water gun of the cleaning machine is adjusted to the water columnar shape. After rinsing each component of the air-cooled host once, use professional fin cleaning agent to spray evenly on the condenser fins, wait for its reaction, and rinse with the water gun after foaming until there is no residue and wipe dry.
5. Cleaning and maintenance of terminal equipment
terminal equipment mainly includes fan coil , wind hood, combined air processing machine, etc. The terminal equipment circulates the indoor air for a long time, causing dust, bacteria, etc. in the air to accumulate on the internal devices such as the equipment aluminum fins, impeller, , etc. Dirt such as fibrous substances accumulate and blockage, causing the air volume of the terminal equipment to drop, seriously affecting the heat exchange and refrigeration efficiency of central air conditioners. Moreover, the equipment is dark and humid, and various pathogenic bacteria even include Legionella , which breeds in large quantities, causing serious air pollution and causing harm to human health.
- Use a tool to remove the fan coil return bellows (if any) and filters;
- remove the motor and turbines;
- clean the filter and return bellows surface dirt;
- clean the surface of the motor and turbine blades;
- clean the dirt on the motor surface and turbine blades;
- fin cleaner sprays on surface cooler for reaction;
- remove all the dirt in the fins, rinse and clean the fins of the surface cooler group;
- clean the condensate tray;
- unblock the condensate pipe;
- install the motor, turbine, return bellows and filters;
- remove the return air outlet and scrub it clean;
- clean the vent filter;
- install the return air outlet and return air outlet filter;
- clean the vent vent ;
- start the trial operation, clean the site after running well and evacuate.
