User manual

18_ installing your air conditioner
Indoor Unit Installation
It is recommended to install the Y- joint before installing the
indoor unit.
1.
Place the pattern sheet on the ceiling at the spot where you
want to install the indoor unit.
Since the diagram is made of paper, it may shrink
or stretch slightly due to temperature or humidity.
For this reason, before drilling the holes maintain
the correct dimensions between the markings.
Pattern sheet is supplied depending on the model
type.
Note
2.
Insert bolt anchors, use existing ceiling supports or
construct a suitable support as shown in figure.
3.
Install the suspension bolts depending on the ceiling type.
 Ensure that the ceiling is strong enough to
support the weight of the indoor unit.
Before hanging the unit, test the strength
of each attached suspension bolt.
 If the length of suspension bolt is more than
1.5m, it is required to prevent vibration.
 If this is not possible, create an opening on
the false ceiling in order to be able to use it
to perform the required operations on the
indoor unit.
4.
Screw eight nuts to the suspension bolts making space for
hanging the indoor unit.
You must install the suspension bolts more than
four when installing the indoor unit.
Concrete
Suspension bolt(3/8" or M10)
Hole in anchor
Hole in plug
Insert
Ceiling support
5.
Hang the indoor unit to the suspension bolts between two nuts.
Piping must be laid and connected inside the
ceiling when suspending the unit. If the ceiling is
already constructed, lay the piping into
position for connection to the unit before
placing the unit inside the ceiling.
Note
6.
Screw the nuts to suspend the unit.
7.
Adjust level of the unit by using measurement plate for all 4 sides.
For proper drainage of condensate, give a
10mm(3mm) slant to the left or right side of the
unit which will be connected with the drain hose,
as shown in the figure. Make a tilt when you wish to
install the drain pump, too.
Note
AVXDS/NHLH
/NDLH
/ND022/028/036SH
Performing Leak Test & Insulation
LEAK TEST WITH NITROGEN(before opening valves)
In order to detect basic refrigerant leaks, before recreating the
vacuum and recirculating the R410A, it’s responsible of installer
to pressurize the whole system with nitrogen(using a pressure
regulator) at a pressure above 4.1MPa(gauge).
LEAK TEST WITH R410A(after opening valves)
Before opening valves, discharge all the nitrogen into the
system and create vacuum. After opening valves check leaks
using a leak detector for refrigerant R410A.
Leak test
Discharge all the nitrogen to create a vacuum and
charge the system.
AVXDU /NDHH
/ND045SH
Rubber
1.
To avoid condensation problems, place T13.0 or thicker
Acrylonitrile Butadien Rubber separately around each
refrigerant pipe.
Always make the seam of pipes face upwards.
Note
Once you have checked that there are no leaks in the system,
you can insulate the piping and hose.
Insulation
No gap
NBR(T13.0 or thicker)
Installation Part
g ND022/028/036SH: 3mm
AVXDS / NHLH / NDLH: 3mm
AVXDU / NDHH / ND045SH: 10mm
Drain hose port
10mm(3mm)
Leak check
Leak check