12 Unit installation
Installation and operation manual
15
FXMA-A
VRV system air conditioner
3P688304-1 – 2022.03
e
1526
e
1028
a
b
b
d
c
a
Nut (field supply)
b
Washer (accessories)
c
Hanger bracket
d
Double nut (field supply)
e
Suspension bolt pitch
▪
Install the unit temporarily.
1
Attach the hanger bracket to the suspension bolt.
2
Fix it securely.
▪
Level
. Make sure the unit is level at all four corners using a level
or a water-filled vinyl tube.
b
a
a
Water level
b
Vinyl tube
3
Tighten the upper nut.
NOTICE
Do NOT install the unit tilted.
Possible consequence:
If
the unit is tilted against the direction of the condensate flow
(the drain piping side is raised), the float switch might
malfunction and cause water to drip.
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.
INFORMATION
For installation of the optional output PCB or the optional
8 mm pre-filter see the reference guide located on
. Use the search function
to find your
model.
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
In case of installation WITHOUT the duct on inlet side,
make sure to install the air filter. For more information refer
to the option list of the indoor unit.
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
The ducting is to be field supplied.
a
c
e
f
d
d
b
c
4
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.
8
Insulate the ducts to prevent condensation from forming. Use
glass wool or polyethylene foam 25 mm thick.
a
b
c
b
a
f
f
e
e
d
d
a
Screws for duct flanges (accessory)
b
Flange (located on the unit)
c
Main unit
d
Insulation (field supply)
