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Installation
Installer reference guide
31
FNA25~60A2VEB(9)
Split system air conditioners
4P550955-3C – 2020.12
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. For setting refer to the installation manual of the used user
interface.
The ducting is to be field supplied.
▪
Air inlet side.
Attach the duct and intake-side flange (field supply). For
connecting the flange, use 7 accessory screws.
a b
b a
e
e
d
d
c
a
Connection screw (accessory)
b
Flange (field supply)
c
Main unit
d
Insulation (field supply)
e
Aluminium tape (field supply)
▪
Fixing screws
. When installing an air inlet duct, select fixing screws that stick out
5 mm on the inside of the flange to protect the air filter from damage during
maintenance of the filter.
a
b
c
5 mm
a
Air inlet duct
b
Inside of the flange
c
Fixing screw
▪
Filter.
Be sure to attach an air filter inside the air passage on the intake side. Use
an air filter with dust collecting efficiency ≥50% (gravimetric method). The
included filter is not used when the intake duct is attached.
▪
Air outlet side.
Connect the duct according to the inside dimension of the outlet-
side flange.
▪
Air leaks.
Wind aluminium tape around the intake side flange and duct
connection. Make sure there are no air leaks at any other connection.
▪
Insulation.
Insulate the duct to prevent condensation from forming. Use glass
wool or polyethylene foam 25 mm thick.
