2. Connect the refrigerant connecting pipe to the pipe joint of the indoor unit. When connecting, be sure to use two wrenches, fix the connecting bolt with adjustable wrench, and tighten the connecting nut with torque wrench. If the condensate drain pipe is not long enough, please connect the nozzle attached to the machine; Remove the control box cover of the outdoor unit, connect the cables to the terminals corresponding to the terminal board according to the number and color, and then install the control box cover; Unscrew the multifunctional cover on the backflow valve and turn the liquid card in the direction of valve opening.
3. Use the valve core in the mouth to push out the nitrogen and air filled with refrigerant in the connecting pipe and indoor unit, and the deflation time depends on the requirements of the installation instructions. Use an electronic halogen leak detector to detect leaks or use a cleaner to evenly spread on all interfaces to detect leaks. If there is leakage, it is necessary to close the valve, loosen the joint, cut off the bell mouth and re-flare it, reconnect it, and exhaust until there is no leakage; Completely unscrew the liquid valve and air return valve.
4. Unscrew the indoor unit panel, unscrew the screw of the terminal board, connect the cable to the corresponding terminal of the terminal board according to the number and color of the terminal board, cover the junction box panel and tighten the screw. Shaping the connecting pipe to make it close to the wall, wrapping the joint with adhesive sponge, and wrapping the connecting pipe and cable together with PVC wrapping tape and pressure sensitive adhesive tape; Add half a glass of water to the condensation water tank at the lower part of the heat exchanger of the indoor unit to test whether the drainage is smooth and cover the indoor unit panel.
5. Check the insulation resistance between the power cord and the grounding wire led from the air conditioner power plug, and confirm that the value is not less than 2MΩ. Plug in the power supply and check the grounding resistance; If the user power supply has no grounding wire, it is necessary to add a reliable grounding wire; Power-on trial operation, Century Star introduces whether all functions of air conditioner can be realized normally, and demonstrates for users, but does not try to cool in winter or heat in summer; Check the temperature difference between the air inlet and outlet. It should be 12~ 17℃ for cooling and16 ~ 23℃ for heating. 17. Seal the wall hole with sealant.
Air conditioning installation hidden trouble
Hidden trouble 1: the air conditioning bracket is over-aged.
Many outdoor units of air conditioners are placed on brackets. When choosing to install air conditioning brackets, these three materials are generally used: thin steel, angle steel and stainless steel. Of these three materials, stainless steel is the most durable, followed by angle steel and finally thin steel. In the eyes of many people, it is best to replace the angle steel bracket of the outdoor unit of air conditioner at 10, but if it is made of thin steel, the general service life is five years. Replace the bracket of the outdoor air conditioner regularly to avoid making the outdoor air conditioner a high-altitude bomb.
Hidden danger 2: air conditioning installation is chaotic.
In many communities, we often see the messy installation of outdoor air conditioners, which will affect the beauty of the whole floor on the one hand, and affect the contradictions between neighbors on the other hand. For example, installing an external machine above someone else's bedroom will affect others' sleep when the air conditioner works at night.
Hidden trouble 3: the installation of outdoor air conditioning awning is unreasonable.
In fact, it is very unnecessary to install the awning of outdoor air conditioning. Generally, outdoor air conditioners are waterproof. After the awning is installed, it will affect the heat dissipation effect of outdoor air conditioning, which is very unfavorable to the operation of outdoor air conditioning, especially when it is hot in summer.
Hidden trouble 4: the installation price of air-conditioning external machine "starts from the ground"
As soon as the air conditioner is sold well, the installation cost of the outdoor unit of the air conditioner will rise, and the installation technology of some masters is also very worrying. In addition, many stores are irresponsible for replacing the bracket of the outdoor unit of air conditioner. If users want to replace the bracket of the outdoor air conditioner, they have to pay again, so many users will be reluctant to replace the outdoor air conditioner, thinking that it will have no impact on their lives.