5 Preparation
Installer reference guide
9
ARXM25~35 RXM20~35 RXJ20~3
RXA20~35A3V1B
R32 split series
4P518023-5D – 2019.04
CAUTION
▪ Check if the installation location can support the unit's
weight. Poor installation is hazardous. It can also cause
vibrations or unusual operating noise.
▪ Provide sufficient service space.
▪ Do NOT install the unit so that it is in contact with a
ceiling or a wall, as this may cause vibrations.
▪ Choose a location where the hot/cold air discharged from the unit
or the operation noise, will NOT disturb anyone.
▪ Provide sufficient space around the unit for servicing and air
circulation.
▪ Avoid areas where flammable gas or product might leak.
Install power cables at least 1 metre away from televisions or radios
to prevent interference. Depending on the radio waves, a distance of
3 metres may NOT be sufficient.
WARNING
Do NOT place objects below the indoor and/or outdoor unit
that may get wet. Otherwise condensation on the unit or
refrigerant pipes, air filter dirt or drain blockage may cause
dripping, and objects under the unit may get dirty or
damaged.
WARNING
The appliance shall be stored in a room without
continuously operating ignition sources (example: open
flames, an operating gas appliance or an operating electric
heater).
5.2.1
Installation site requirements of the
outdoor unit
INFORMATION
Also read the following requirements:
▪ General installation site requirements. See the
"General safety precautions" chapter.
▪ Refrigerant
piping
requirements
(length,
height
difference). See further in this "Preparation" chapter.
Mind the following spacing guidelines:
>150
>50
>300
(mm)
b
a
>100
>50
>150
>50
b
b
a
>100
b
a
a
b
a
>100
a
Air outlet
b
Air inlet
NOTICE
The height of the wall on the outlet side of the outdoor unit
MUST be ≤1200 mm.
NOTICE
▪ Do NOT stack the units on each other.
▪ Do NOT hang the unit on a ceiling.
Strong winds (≥18 km/h) blowing against the outdoor unit’s air outlet
causes short circuit (suction of discharge air). This may result in:
▪ deterioration of the operational capacity;
▪ frequent frost acceleration in heating operation;
▪ disruption of operation due to decrease of low pressure or
increase of high pressure;
▪ a broken fan (if a strong wind blows continuously on the fan, it
may start rotating very fast, until it breaks).
It is recommended to install a baffle plate when the air outlet is
exposed to wind.
It is recommended to install the outdoor unit with the air inlet facing
the wall and NOT directly exposed to the wind.
b
a
b
c
a
Baffle plate
b
Prevailing wind direction
c
Air outlet
Do NOT install the unit in the following places:
▪ Sound sensitive areas (e.g. near a bedroom), so that the
operation noise will cause no trouble.
Note: If the sound is measured under actual installation
conditions, the measured value might be higher than the sound
pressure level mentioned in Sound spectrum in the data book due
to environmental noise and sound reflections.
INFORMATION
The sound pressure level is less than 70 dBA.
▪ In places where a mineral oil mist, spray or vapour may be
present in the atmosphere. Plastic parts may deteriorate and fall
off or cause water leakage.
It is NOT recommended to install the unit in the following places
because it may shorten the life of the unit:
▪ Where the voltage fluctuates a lot
▪ In vehicles or vessels
▪ Where acidic or alkaline vapour is present
Seaside installation.
Make sure the outdoor unit is NOT directly
exposed to sea winds. This is to prevent corrosion caused by high
levels of salt in the air, which might shorten the life of the unit.
