27
Installation Manual
3. Horizontal Check of the Indoor Unit
After the installation of the indoor unit, its horizontal must be checked to make sure the unit keep horizontal fore and aft and keep an
inclination of 1° toward the drain pipe right and left.
Horizontal tester
● Prior to the installation, please make a good preparation for all piping (refrigerant pipe, drain pipe) and wring (wires of the wired
controller, wires between the indoor and outdoor unit) of the indoor unit to make the further installation much easy.
● If there is an opening in the ceiling, it is better to reinforce it to keep it flat and prevent it vibrating. Consult the user and builder for
more details.
● If the strength of the ceiling is not strong enough, abeam made of angle iron can be used and then fix the unit on it.
● If the indoor unit is not installed in the air conditioning area, please use sponge around the unit to prevent condensing. The thickness
of the sponge depends on the actual installation environment.
CAUTION!
1. Cut the connection pipe with the pipe cutter and remove the burrs.
2. Hold the pipe downward to prevent cuttings from entering the pipe.
3. Remove the flare nuts at the stop valve of the outdoor unit and inside the accessory bag of the indoor unit, then insert them to the
connection pipe, after that, flare the connection pipe with a flaring tool.
4. Check if the flare part is spread evenly and there are no cracks.
1. The pipes are shaped by your hands. Be careful not to collapse them.
2. Do not bend the pipes in an angle more than 90°.
3. When pipes are repeatedly bent or stretched, the material will harden, making it difficult to bend or stretch them any more. Do not
bend or stretch the pipes more than three times.
4. When bending the pipe, do not bend it as is. The pipe will be collapsed. In this case, cut the heat insulating pipe with a sharp cutter,
and bend it after exposing the pipe. After bending the pipe as you want, be sure to put the heat insulating pipe back on the pipe, and
secure it with tape.
Installation of the Connection Pipe
a. Flare Processing
b. Bending Pipes
ĸ
h
Extend the pipe by unwinding it
Pipe
Cutter
Cutt line
Heat insulating pipe
● To prevent breaking of the pipe, avoid sharp bends. Bend the pipe with a radius of curvature of 150 mm or over.
● If the pipe is bent repeatedly at the same place, it will break.
CAUTION!
Detach the caps and plugs from the pipes.
● Be sure to apply the pipe against the port on the indoor unit correctly. If the centering is improper, the flare nut cannot be tightened
smoothly. If the flare nut is forced to turn, the threads will be damaged.
● Do not remove the flare nut until the connection pipe is to be connected so as to prevent dust and impurities from coming into the
pipe system.
CAUTION!
c. Connecting the Pipe at the Indoor Unit Side
Centering the pipe against port on the indoor unit, turn the flare nut with your hand.
