4 Installation
Installation manual
6
3(A)MXM+3(A)MXF+4MXM+5MXM
R32 Split series
3P600450-1C – 2020.05
It is recommended to provide at least 150 mm of free space below
the unit (300 mm for heavy snowfall areas). Additionally, make sure
the unit is positioned at least 100 mm above the maximum expected
level of snow. If necessary, construct a pedestal. See
6] for more details.
In heavy snowfall areas it is very important to select an installation
site where the snow will NOT affect the unit. If lateral snowfall is
possible, make sure that the heat exchanger coil is NOT affected by
the snow. If necessary, install a snow cover or shed and a pedestal.
3.1.3
Refrigerant piping length and height
difference
INFORMATION
For the Hybrid for Multi application and the DHW generator
for Multi, see the indoor unit installation manual for the
maximum allowable refrigerant piping length and height
difference.
The shorter the refrigerant piping, the better the performance of the
system.
The piping length and height differences must comply with the
following requirements.
Model
Minimum required space
3MXM40, 3MXM52, 3AMXM52,
3MXF52, 3AMXF52
4.7 m
2
3MXM68, 3MXF68
5.5 m
2
4MXM68
6.5 m
2
4MXM80
9.8 m
2
5MXM90
10.4 m
2
Shortest allowable length per room is 3 m.
Outdoor unit
Refrigerant piping
length to each indoor
unit
Refrigerant piping
total length
3MXM40,
3MXM52,
3AMXM52,
3MXM68,
3MXF52,
3AMXF52,
3MXF68
≤25 m
≤50 m
4MXM68
≤60 m
4MXM80
≤70 m
5MXM90
≤75 m
Height difference
outdoor-indoor
Height difference
indoor-indoor
Outdoor unit installed
higher than indoor
unit
≤15 m
≤7.5 m
Outdoor unit installed
lower than at least 1
indoor unit
≤7.5 m
≤15 m
4
Installation
WARNING
Installation shall be done by an installer, the choice of
materials and installation shall comply with the applicable
legislation. In Europe, EN378 is the applicable standard.
4.1
Mounting the outdoor unit
4.1.1
To provide the installation structure
Use a vibration-proof rubber (field supply) in cases where vibrations
may be transmitted to the building.
The unit may be installed directly on a concrete veranda or another
solid surface as long as it provides proper drainage.
Prepare 4 sets of M8 or M10 anchor bolts, nuts and washers (field
supply).
20 mm
(mm)
353
600
240
240
a
a
100 mm above expected level of snow
4.1.2
To install the outdoor unit
4× M8/M10
4.1.3
To provide drainage
NOTICE
In cold areas, do NOT use a drain socket, hose and caps
(large, small) with the outdoor unit. Take adequate
measures so that the evacuated condensate CANNOT
freeze.
