4 Preparation
Installation manual
9
RXS50+60 + RX50+60 + ARXS50~71
R410A split series
3P360062-1H – 2016.09
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.
Install the outdoor unit away from direct sea winds.
Example:
Behind the building.
b
c
a
If the outdoor unit is exposed to direct sea winds, install a
windbreaker.
▪ Height of windbreaker≥1.5×height of outdoor unit
▪ Mind the service space requirements when installing the
windbreaker.
a
b
c
d
c
d
a
Sea wind
b
Building
c
Outdoor unit
d
Windbreaker
The outdoor unit is designed for outdoor installation only, and for
ambient temperatures ranging:
Models
Heating mode
Cooling mode
RXS50K2V1B
RXS60F4V1B
RX50~60G3V1B
RXS50~60L2V1B
RX60G4V1B
ARXS50G3V1B
–15~18°C
–10~46°C
ARXS50~71L2V1B
RXG50K3V1B
–15~18°C
10~46°C
What?
Distance
Maximum allowable pipe length
30 m
Minimum allowable pipe length
3 m
Maximum allowable height distance
20 m
4.1.2
Additional installation site requirements
of the outdoor unit in cold climates
Protect the outdoor unit against direct snowfall and take care that the
outdoor unit is NEVER snowed up.
a
b
c
c
d
a
Snow cover or shed
b
Pedestal
c
Prevailing wind direction
d
Air outlet
▪ In any case, provide at least 300 mm of free space below the unit.
Additionally, make sure the unit is positioned at least 100 mm
above the maximum expected level of snow. See
"5.2 Mounting
the outdoor unit" on page 10
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.
4.2
Preparing refrigerant piping
4.2.1
Refrigerant piping requirements
▪
Piping material:
Phosphoric acid deoxidised seamless copper.
▪
Piping diameter:
Class 50 and 60
Liquid piping
Ø6.4 mm (1/4")
Gas piping
Ø12.7 mm (1/2")
Class 71
Liquid piping
Ø9.5 mm (3/8")
Gas piping
Ø15.9 mm (5/8")
▪
Piping temper grade and thickness:
Outer diameter
(Ø)
Temper grade
Thickness (t)
(a)
6.4 mm (1/4")
Annealed (O)
≥0.8 mm
t
Ø
9.5 mm (3/8")
≥1 mm
12.7 mm (1/2")
≥0.8 mm
15.9 mm (5/8")
≥1 mm
(a)
Depending on the applicable legislation and the unit's
maximum working pressure (see "PS High" on the unit
name plate), larger piping thickness might be required.
4.2.2
Refrigerant piping insulation
If the temperature is higher than 30°C and the humidity is higher
than RH 80%, the thickness of the insulation materials should be at
least 20 mm to prevent condensation on the surface of the
insulation.
