10
Use a scale having a precision with at least 10 g per index line when adding
the refrigerant.
Do not use a bathroom scale or similar instrument.
Precautions for adding refrigerant
Drain
guide
Space for pipes
Wall
Shield pipe
Inside the room
Drain hose
Extension drain hose
Arrange the drain pipe for proper drainage from the unit.
Improper drainage can result in dew-dropping.
This air conditioner has the structure designed
to drain water collected from dew, which forms
on the back of the indoor unit, to the drain pan.
Therefore, do not store the power cord and other
parts at a height above the drain guide.
CAUTION
OUTDOOR UNIT
OUTDOOR UNIT
Installation Place
• A place which provides the spaces around the outdoor unit as shown in the
diagram
• A place which can bear the weight of the outdoor unit and does not allow an
increase in noise level and vibration
• A place where the operation noise and discharged air do not disturb your
neighbors
• A place which is not exposed to a strong wind
• A place free of a leakage of combustible gases
• A place which does not block a passage
• When the outdoor unit is to be installed in an elevated position, be sure to
secure its feet.
• The allowable length of the connecting pipe.
Model
38TVBA018
38TVBA024
Chargeless
Up to 15 m
Up to 15 m
Maximum length
20 m
20 m
Additional refrigerant
charging
16 - 20 m
(20 g / 1 m)
16 - 20 m
(20 g / 1 m)
Maximum refrigerant
charging
1.050 kg
1.060 kg
• The allowable height of outdoor unit installation site.
Model
38TVBA018
38TVBA024
Maximum height
12 m
12 m
• A place where the drain water does not raise any problems
CAUTION
1. Install the outdoor unit without anything blocking the air discharging.
2. When the outdoor unit is installed in a place always exposed to strong
wind like a coast or on a high storey of a building, secure the normal fan
operation using a duct or a windshield.
3. In particularly windy areas, install the unit such as to avoid admission of
wind.
4. Installation in the following places may result in trouble.
Do not install the unit in such places.
• A place full of machine oil
• A saline-place such as the coast
• A place full of sul
fi
de gas
• A place where high-frequency
waves are likely to be generated
as from audio equipment, welders,
and medical equipment
Strong
wind
2. Put water in the drain pan and make sure that the water is drained out of
doors.
3. When connecting extension drain hose, insulate the connecting part of
extension drain hose with shield pipe.
Do not form the
drain hose into
a wavy shape.
Do not rise the
drain hose.
50 mm
or more
Do not put the
drain hose end
into water.
Do not put the
drain hose end
in the drainage ditch.
Drainage
1. Run the drain hose sloped downwards.
NOTE
• The hole should be made at a slight downward slant on the outdoor side.
When the outdoor unit is installed in a place where the drain water
might cause any problems, Seal the water leakage point tightly using a
silicone adhesive or caulking compound.
CAUTION
90
Obliquity
Roughness
Warp
Refrigerant Piping Connection
1. Cut the pipe with a pipe cutter.
2. Insert a
fl
are nut into the pipe and
fl
are the pipe.
•
Projection margin in
fl
aring : A (Unit : mm)
RIDGID
(clutch type)
IMPERIAL
(wing nut type)
Outer dia. of copper pipe
R32
Ø6.35
1.5 to 2.0
Ø9.52
1.5 to 2.0
Ø12.70
2.0 to 2.5
Pipes thickness
0.8 mm or more
Outer dia.
of copper pipe
R32 tool used
Conventional tool
used
Ø6.35
0 to 0.5
1.0 to 1.5
Ø9.52
0 to 0.5
1.0 to 1.5
Ø12.70
0 to 0.5
1.0 to 1.5
Pipes thickness
0.8 mm or more
Flaring
A
Die
Pipe
• Do not scratch the inner surface of the
fl
are part when removing burrs
• Flare processing under the condition of scratches on the inner surface
of
fl
are processing part will cause refrigerant gas leak.
CAUTION
01_1124950113_EN.indd 10
01_1124950113_EN.indd 10
23/11/2563 BE 18:36
23/11/2563 BE 18:36
