10
Indoor unit installation
It is recommended to install the refnet 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; refer to pages
8~9.
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(59.06 inch), 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 more than four suspension bolt when installing the
indoor unit.
5. Check the level of the indoor unit by using a leveler or a vinyl tube filled with
water.
- 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 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.
Ceiling
Gauge of Dimensions
Air
inlet
Air
outlet
15
m
m
(0
.5
9"
)
15
m
m
(0
.5
9"
)
MH
✴✴✴
FSBA
Ceiling
Gauge of
Dimensions
17mm(0.67")
20mm(0.79")
Indoor unit
MH
✴✴✴
FSBA
7. Tighten the upper part nuts.
8. Remove the gauge of dimensions after installing the indoor unit.
Ceiling support
Concrete
Suspension bolt(3/8" or M10)
Hole in anchor
Hole in plug
Insert
Not supplied
Washer
(supplied)
Rubber
Fasten the nut
Vinyl tube
Level
NOTE
CAUTION
CAUTION
FJM IDU-PH_Cassette type_IM_31595A-04_EN.indd 10
2015-11-16 오후 4:52:21
