盈彩厅

Dry! Eight steps of central air conditioning installation...

The effect of central air conditioning is good, most of which depends on the installation of central air conditioning. In addition to reliable quality products, high-quality air conditioning installation materials and engineering, professional reliable service and after-sales service are equally important. Today, Yuefeng air conditioning mechanical and electrical engineering shares with you the eight steps of central air conditioning installation. Let's have a look.

盈彩厅1. Site positioning, indoor unit installation

The first step to enter the site is to hoist the internal machine. The distance between the internal machine and the roof shall not be less than 1cm to avoid resonance between the machine and the wall top during operation. The indoor unit must be hoisted and leveled. After installation, special tools shall be used to measure whether the unit is level.

Indoor machine shall be neatly packed with fresh-keeping film to prevent dust accumulation. The indoor unit shall be fixed separately and shall not be used as a common hanger with other equipment, and horizontal hoisting shall be ensured. The connection between piping and indoor unit shall be wrapped with insulation hose, and the pipeline shall not cross with other pipelines during installation, and shall be fixed on the pipe hanger, and the fixed pipe bridge shall be vertical to the ground.

2. Refrigerant pipe installation

After the installation of the internal machine, the refrigerant copper pipe can be installed. All welding points should be the connection between the copper pipe and the branch pipe for welding. There is no welding between the copper pipe and the copper pipe. In the process of welding, nitrogen (nitrogen filling welding process) must be injected into the copper pipe to make the copper pipe free of air, so as to avoid the failure caused by welding and carbon deposition on the inner wall, so as to enter the compressor during formal operation. After welding, high pressure nitrogen shall be used for soot blowing in the pipe to keep the copper pipe clean.

3. Condensate pipe and circuit installation

It should be noted that after the condensate pipe is connected from the internal unit to the outdoor or floor drain, the gradient of at least > 1% shall be maintained. The high-quality installation is connected from the indoor unit to the nearest floor, and finally connected to the outdoor or floor drain together with other condensate pipes.

4. Central air conditioning installation pressure test pressure maintaining, concealed works acceptance

Nitrogen filling and pressure maintaining. After welding, pressure test must be carried out on the copper pipe, and a certain pressure of nitrogen shall be filled into the copper pipe for pressure maintaining. Generally, the pressure test time is 24 hours. If R410A refrigerant is used, the pressure in the pipe shall be maintained at 40kg, and R22 refrigerant shall be maintained at 20kg.

Nitrogen is an inert gas with a small expansion coefficient and almost no pressure change due to thermal expansion and cold contraction. If the pressure gauge drops during the test, check whether there is any problem with the refrigerant pipe welding. In order to ensure that the installation and construction are in place, all pressure gauges are not removed after 24-hour pressure maintaining. In order to avoid false damage to the refrigerant system during other decoration construction, they are not removed until the power on test of the external unit, so as to fully ensure the safe operation of the refrigerant system.

盈彩厅5. Installation of air inlet of central air conditioner

Generally, the return air port will be installed together with the maintenance port, and the size of the air port must be consistent with the return air port of the internal unit, so as to ensure the best return air volume and enough maintenance space.

6. Controller installation, refrigerant filling

盈彩厅Before filling the refrigerant, it is necessary to vacuumize the refrigerant pipe, extract the air in the pipe, keep the pipe dry and free of water, otherwise the air and water will mix with the refrigerant to produce ice crystals, which will cause serious damage to the equipment. The refrigerant pipe needs to be connected to the external unit for operation; the time for vacuumizing is generally not less than two hours for multi line connection, and not less than 20 minutes for one draught fan.

盈彩厅7. Outdoor unit installation

The ground concrete height of outdoor unit for central air conditioning installation is considered to be the snow buried depth, which is about 150-200mm higher than the ground, and a drainage ditch is reserved to facilitate the discharge of defrosted water from the main unit. The foundation surface shall be flat to ensure the normal operation of the machine. The air outlet of the external fan must be within 50 cm and the rear 15 cm of the internal and external machine. All landing feet must be equipped with damping blocks to ensure the normal operation of the external machine.

8. Commissioning acceptance

Open the refrigerant valve, release the refrigerant inside the external machine, start up the machine to test and detect the pressure, supplement appropriately until the commissioning is completed.

盈彩厅Today, the central air conditioning project is widely used in factories, workshops, office buildings, office buildings, shopping malls, supermarkets, schools, villas and other occasions. Compared with the traditional air conditioning, the central air conditioning has the advantages of energy saving and energy saving, environmental protection and health, and is welcomed by users.

This article comes from Guangdong Yuefeng air conditioning mechanical and Electrical Engineering Co., Ltd. reprint please indicate the source!For more information about Yuefeng air conditioning electromechanical engineering, please click www.yuefeng.com, 24-hour hotline: 138-0964-9905!