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3.2 Recommended Outdoor Unit
Combination
CAUTION
When all indoor units are running at the same
time, the total capacity of the indoor units
should be less than or equal to the combined
capacity of the outdoor unit to prevent
overloading in bad working conditions or
narrow operating space.
If the system is applied in a cold region
(ambient temperature is -10°C or below) or a
very hot, heavy loading environment, the
total capacity of the indoor units should be
less than the combined capacity of the
outdoor unit.
4 PREPARATIONS BEFORE
INSTALLATION
4.1 Overview
This chapter mainly describes the precautions and
things to note before the unit is installed at the site.
This mainly includes the following information:
Choose and Prepare the Installation Site.
Select and Prepare the Refrigerant Piping.
Select and Prepare the Electrical Wiring.
4.2 Choosing And Preparing The
Installation Site
4.2.1 Site requirements
Provide sufficient space around the unit for
maintenance and air circulation.
Make sure the installation site can bear the weight
of the unit and vibrations.
Make sure the area is well ventilated.
Make sure the unit is stable and level.
Choose a place where the rain can be avoided as
much as possible.
The unit should be installed in a location where the
noise generated by the unit will not cause any
inconveniences to any person.
Choose a site that will comply with the applicable
law.
Do not install the unit in the following locations:
An environment where there is a potential risk of
explosions.
Where there are equipment emitting electromagnetic
waves. Electromagnetic waves may disrupt the
control system, and cause the unit to malfunction.
Where there are existing fire hazards like leakage of
flammable gases, carbon fibers, and combustible
dust (such as diluents or gasoline).
Where corrosive gases (such as sulphurous gases)
are produced. Corrosion of copper pipes or welded
parts may lead to refrigerant leakage.
Where mineral oil mist, spray, or steam may exist in
the atmosphere. Plastic parts may age, fall off or
cause water leakage.
Where there is a high salt content in the air such as
places near the sea.
Electric appliances that should not be used
by the general public must be installed in the
safety area to prevent others from getting
close to these electric appliances.
Both indoor and outdoor units are suitable for
the installation of commercial and light
industrial environment.
An
excessively
refrigerant in an enclosed area can lead to
anoxia (oxygen deficiency).
This is a class A product. This product may
cause radio interference in the home
environment. The user may need to take the
necessary measures if such a situation does
arise.
The unit described in this manual may cause
electronic noise generated by radio
frequency energy. The unit conforms to the
design specifications and provides
reasonable protection to prevent such
interference. However, there is no guarantee
that there will be no interference during a
specific installation process.
Therefore, it is suggested that you install the
units and wires at an appropriate distance
from devices like sound equipment and
personal computers.
Do take into considerations adverse environmental
conditions such as strong winds, typhoons or
earthquakes as an improper installation may cause
the unit to overturn.
Take precautions to make sure the water will not
damage the installation space and environment in
the event of a water leakage.
If the unit is installed in a small room, refer to
section 4.2.3 "Caution for refigerant leaks" to make
sure the refrigerant concentration does not exceed
the permissible safety limit when there is a
refrigerant leak.
Make sure the air inlet of the unit is not directed at
the main wind direction. Incoming wind will disrupt
the operations of the unit. If necessary, use a
deflector as an air baffle.
Add water drain piping on the base so that the
condensed water will not damage the unit, and
prevent the accumulation of water to form pits when
the works are in progress.
4.2.2 Site requirements for installation of
outdoor unit in cold regions
Snow protection facilities must be installed in
areas with snowfall. Refer to the following
figure, (malfunctions are more common when
there is insufficient snow protection facilities).
In order to protect the unit from accumulated
snow, increase the height of the rack, and
install a snow shield at the air inlets and
outlets.
Do not obstruct the air flow of the unit when
you install the snow shield.
12
CAUTION
high
concentration
of
NOTE
NOTE
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