8 standard processes for central air conditioning installation!

8 standard processes for central air conditioning installation!

In terms of home improvement, concealed projects include water and electricity, there is also central air-conditioning, and central air-conditioning has three points of quality and seven points of installation; there are many kinds of materials and technology for installation. It can be said that every master has every master’s method, from the beginning Central air-conditioning design, plan configuration, communication with the designer/owner to determine the positioning drawing, and then start the installation when entering the site.

　　The central air conditioning installation steps are as follows:

　　 1. Internal machine installation: The first step for the construction team to enter the site is to hoist the internal machine. Just pay attention to two points to avoid subsequent problems.

　　①The distance between the internal machine and the roof should not be less than 1 cm to avoid resonance with the wall when the machine is running.

　　②In the hoisting of the internal machine, a one-hundredth slope should be considered, and the side connected to the condensate should be slightly lower to avoid the condensate not being discharged.

　　Standard process: The installation master will check the drainage position according to the drawings on site (model, positioning drawing), and the drainage must be given priority. Then install the hanging code positioning: It is required that two hanging codes are required between 90-100cm to ensure the horizontal and vertical condensing pipe. Thick stainless steel hanging codes must be used: between 90-100CM must be fixed by two hanging codes: color pipe card color distinction: gas pipe, liquid pipe, condensate pipe: stick warning labels, for better construction of the workers behind.

　　2. Installation of refrigerant copper pipes: After installing the internal unit, the refrigerant copper pipes can be installed. This is an important part of the central air-conditioning installation process.

　　①All welding points should be the joints of copper pipes and branch pipes, and there should be as few copper pipes as possible.

　　② Nitrogen must be flushed into the copper pipe during the welding process (nitrogen-filled welding process). This makes the copper pipe no air and avoids welding and carbon build-up on the inner wall, which may cause malfunctions when entering the compressor during official operation.

　　③After welding, high-pressure nitrogen should be used to blow soot inside the pipe to keep the copper pipe clean.

3. Nitrogen filling and pressure maintenance: This is a pressure test that must be performed on the copper pipe after the welding is completed. The copper pipe is filled with nitrogen at a certain pressure to maintain the pressure. The general pressure test time is 24 hours, and a company stipulates that the pressure test time is at least 48 hours, usually a week; to ensure that the copper pipe does not leak.

　　 Special instructions are required: When using R410 refrigerant, the pressure in the tube must be maintained at 40 kg.

　　Nitrogen is an inert gas with a small expansion coefficient, and there is almost no pressure change due to thermal expansion and contraction. If the pressure gauge drops during the test, you should check whether there is a problem with the welding of the refrigerant pipe.

　　 Air-conditioning copper pipe is the medium of air-conditioning and heating transmission, which is equivalent to the connection of human blood. Fluorine system household central air-conditioning copper pipes are divided into ordinary copper pipes and R410A copper pipes. The copper tubes used in traditional R22 refrigerant air conditioners are ordinary copper tubes, and the copper tubes used by R410A refrigerant air conditioners are R410A copper tubes. At present, fluorine system frequency conversion multi-connected household central air-conditioning host mostly uses R410A refrigerant. Therefore, in the multi-line application of fluorine system, R410a copper pipe is at most.

Since the pressure generated by R410A refrigerant is 1.6 times that of R22 refrigerant, this requires its copper tube to have high density, strong pressure resistance, high cleanliness and uniform copper tube wall thickness, so the air conditioning system of R410a refrigerant must Use special R410a copper tube.

　　In the installation of the system, R410A copper pipe can be used instead of ordinary R22 copper pipe, but it is absolutely impossible to use ordinary R22 copper pipe to replace R410A copper pipe. Many consumers value the overall project price very much. The lower the better, they ignore the importance of installation materials and installation techniques. This often leads some engineering companies to rush to get orders and ignore the quality problems of the later customers’ use of the project. Replacement in order to save costs to meet the customer's price requirements, so that the victim is still the consumer himself.

　　4. Installation of the condensate pipe: After the condensate pipe is connected from the internal machine to the outdoor or floor drain, keep at least a slope of >1%. High-quality installations are connected from the indoor unit and landed nearby, and then connected to the outdoor or floor drain together with other condensate pipes. Strict requirements must be installed in the standard position of each set of condensate pipes vents, to avoid the drain pipe without air pressure, to ensure smooth drainage.

　　 5. Install the outdoor unit: make sure that the air outlet of the outdoor unit fan must be free of obstructions within 50 cm, and all floor feet must be equipped with shock-absorbing pads to ensure the normal operation of the outdoor unit.

6. Vacuuming: After the external machine is installed, the refrigerant tube needs to be evacuated before filling the refrigerant, and the air in the tube must be evacuated to keep the tube dry and free of moisture, otherwise the air and water will mix with the refrigerant to produce ice crystals. Equipment damage.

7. Refrigerant charge: After the above-mentioned work of the designated special refrigerant is completed, the refrigerant valve can be opened to release the refrigerant in the external machine, start the test and check the pressure, and make appropriate supplements until the debugging is completed and the ideal working state is reached.

　　 8. Air outlet measurement and installation: It is recommended to use ABS material as the air outlet to reduce condensation

　　Return air vent: The home central air conditioner usually installs the return air vent and the inspection opening together. The size of the air vent must match the return air vent of the internal machine, and there should be no misalignment, so that the optimal return air volume can be achieved; and enough space for maintenance should be ensured.

Air outlet: The air outlet must not be installed near the light strip (reason: if there is a light strip in front of the air outlet, it will cause the air conditioner to block the wind when heating, and the hot air will go up, making the hot air trapped in the upper part of the room. Therefore, the whole activity space feels insufficient heat, and it takes a long time to feel hot.

　　Only the central air conditioner installed in strict installation standard construction process can maximize the use effect of central air conditioner and reduce the trouble of use.