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Installation Part
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.
Note
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.
2.
Insert bolt anchors, use existing ceiling supports or construct a
suitable support as shown in figure.
Hole in anchor
Hole in plug
Suspension bolt(Ø9.52 or M10)
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
CAUTION
unit, test the strength of each attached suspension
bolt.
If the length of suspension bolt is more than 1.5 m, 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.
CAUTION
Rubber
44_ installing your air conditioner
Concrete
Insert
Ceiling support
Nut
Washer
Fasten the nut
5.
Check the level of the indoor unit by using a leveler.
A tilt of the indoor unit
may cause malfunction of
a built-in float switch and
water leaks.
6.
Adjust the height of the indoor unit by using the gauge of
dimensions.
You should adjust the jigs and the pattern sheet to fit the
cutting dimensions of ceiling.
Noise may occur if you do not adjust the location of the indoor
unit according to location of the jigs during installation.
- Adjust the location of the indoor unit according to the jigs.
Make sure that the indoor unit is installed at a level if the
indoor unit slants too much, there can be water leaks.
AM✴✴✴HN1DEH✴ models have installation guide on the
product. Make sure to adjust the height of the suspension bolt
so that surface of the ceiling and the installation guide on the
indoor unit is parallel to each other.
Slim 1 way cassette
AMFN1DEH/AMJN1DEH
Side view
Air inlet
Air outlet
Jig
Ceiling
❇ Make sure surface of the ceiling and the installation
guide is parallel to each other.
2 way cassette
AMFN2DEH
45mm
45mm
Ceiling
Ceiling
7.
Tighten the upper part nuts.
8.
Remove the gauge of dimensions after installing the indoor
unit.
Performing Leak Test & Insulation
Leak test
LEAK TEST WITH NITROGEN(before opening valves)
In order to detect basic refrigerant leaks, before recreating the
vacuum and recirculating the R-410A, 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 R-410A(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 R-410A.
g The designs and shape are subject
Leak check
to change according to the model.
Discharge all the nitrogen to create a vacuum and
charge the system.
Level
AMHN1DEH
Installation guide
Location of the installation guide
4 way cassette
AMFN4DEH
Indoor unit
20 mm
Ceiling
17mm
Jig
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