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12 Unit installation
INFORMATION
Optional equipment. When installing optional equipment,
also read the installation manual of the optional equipment.
Depending on the field conditions, it might be easier to
install the optional equipment first.
12.2.2
Guidelines when installing the ducting
WARNING
Do NOT install operating ignition sources (example: open
flames, an operating gas appliance or an operating electric
heater) in the duct work.
CAUTION
▪ Make sure the installation of the duct does NOT exceed
the setting range of the external static pressure for the
unit. Refer to the technical datasheet of your model for
the setting range.
▪ Make sure to install the canvas duct so vibrations are
NOT transmitted to the duct or ceiling. Use a sound-
absorbing material (insulation material) for the lining of
the duct and apply vibration insulation rubber to the
hanging bolts.
▪ When welding, make sure NOT to spatter onto the
drain pan or the air filter.
▪ If the metal duct passes through a metal lath, wire lath
or metal plate of the wooden structure, separate the
duct and wall electrically.
▪ Install the outlet grille in a position where the airflow will
not come into direct contact with people.
▪ Do NOT use booster fans in the duct. Use the function
to adjust the fan rate setting automatically (see
"16 Configuration" [ 4 18]).
The ducting is to be field supplied.
b
c
d
a
Air inlet
b
Air outlet
c
Screws for duct flanges
d
Air outlet flange
e
Air inlet flange
f
Transportation case cover
1 Remove the air outlet flange from the transportation case cover.
2 Move and attach the air outlet flange to the air outlet side.
3 Fix the air outlet flange with the 34 screws for duct flanges
(accessory).
4 Fix the air inlet flange using the remaining 15 screws for duct
flanges (accessory).
5 Connect the canvas duct to the inside of the flange on both
sides.
6 Connect the duct to the canvas duct on both sides.
7 Wind aluminium tape around the flanges and duct connections.
Make sure there are no air leaks at any other connection.
Installation and operation manual
14
4
a
c
e
f
d
8 Insulate the ducts to prevent condensation from forming. Use
glass wool or polyethylene foam 25 mm thick.
a
b
d
e
f
a
Screws for duct flanges (accessory)
b
Flange (located on the unit)
c
Main unit
d
Insulation (field supply)
e
Canvas duct (field supply)
f
Aluminium tape (field supply)
▪ Filter. Be sure to attach an air filter inside the air passage on the
air inlet side. Use an air filter with dust collecting efficiency ≥50%
(gravimetric method). The included filter is not used when the
intake duct is attached.
12.2.3
Guidelines when installing the drain
piping
Make sure condensation water can be evacuated properly. This
involves:
▪ General guidelines
▪ Connecting the drain piping to the indoor unit
▪ Checking for water leaks
General guidelines
▪ Pipe length. Keep drain piping as short as possible.
▪ Pipe size. Keep the pipe size equal to or greater than that of the
connecting pipe (vinyl pipe of 25 mm nominal diameter and
32 mm outer diameter).
▪ Slope. Make sure the drain piping slopes down (at least 1/100) to
prevent air from being trapped in the piping. Use hanging bars as
shown.
1~1.5 m
a
Hanging bar
Allowed
Not allowed
▪ Condensation. Take measures against condensation. Insulate
the complete drain piping in the building.
▪ Combining drain pipes. It is possible to combine drain pipes.
Use drain pipes and T-joints with the correct gauge for the
operating capacity of the units.
a
T-joint
To connect the drain piping to the indoor unit
NOTICE
Incorrect connection of the drain hose might cause leaks,
and damage the installation space and surroundings.
c
b
a
f
e
d
a
a
a
FDA200+250AXVEB
Split system air conditioners
3P580564-1E – 2022.11
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