User Manual

ENGLISH
15
AA
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.
Note
2.
Insert bolt anchors, use existing ceiling supports or
construct a suitable support as shown in figure.
Concrete
Suspension bolt(Φ9.52 or M10)
Hole in anchor
Hole in plug
Insert
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.
Ceiling support
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.
Nut
Washer
Rubber
Fasten the nut
CAUTION
CAUTION
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.
Level
6.
Adjust the height of the indoor unit by using
the gauge of dimensions.
 You should adjust the gauge of
dimensions and the pattern sheet to fit
the cutting dimensions of ceiling.
 Make sure that the indoor unit is installed
at a level if the indoor unit slants too
much, there can be water leaks.
4 way cassette
Ceiling
17mm
20mm
Indoor unit
Gauge of
Dimensions
7.
8.
Tighten the upper part nuts.
Remove the gauge of dimensions after
installing the indoor unit.
g The designs and shape are subject
to change according to the model.
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 respon-
sible 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.
Leak test
Leak check
Discharge all the nitrogen to create a vacuum
and charge the system.
INSTALLATION PARTS
Indoor Unit Installation
Performing leak test&insulation