Indoor unit installationInstallation 75Face the concave side of the installation hooks toward the expansible hooks. Determine the length of theinstallation hooks from the height of ceiling, then cut off the unnecessary part.If the ceiling is extremely high, please determine the length of the installation hook depending on the realsituation.3.1.4 Install the main bodyMake the 4 suspender through the 4 hanger of the main body to suspend it. Adjust the hexangular nuts onthe four installation hooks evenly, to ensure the balance of the body. Use a leveling instrument to make surethe levelness of the main body is within ±1°.Adjust the position to ensure the gaps between the body and the four sides of ceiling are even. The body'slower part should sink into the ceiling for 10~12 mm. In general, L is half of the screw length of theinstallation hook.Locate the air conditioner firmly by wrenching the nuts after having adjusted the body's position well.