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2. Before Installation
applied, proper bonding and termination of the
cable shield is required as per Hitachi-Johnson
Controls Air Conditioning guidelines. Plenum
and riser ratings for communication cables
must be considered per application and local
code requirements.
•
The air conditioner may not function normally
in the following instances:
○ If electrical power for the air conditioner is
supplied from the same transformer as a
*1
device
referred to below.
○ If the power source cables for this device
and the air conditioner are located in close
proximity to each other.
*1. A device can include a lift, container crane,
rectifier for electric railway, inverter power
device, arc furnace, electric furnace, large-
sized induction motor and large-sized switch.
Regarding the cases mentioned above, surge
voltage may be inducted into the power supply
cables for the air conditioner due to a rapid
change in power consumption of the device
and an activation of a switch.
Check field regulations and standards before
performing electrical work in order to protect
the power supply for the air conditioner.
•
Turn off and disconnect the unit from the
power source when handling the service
connector. Do NOT open the service cover or
access panel to the indoor or outdoor units
without turning off the main power supply.
2. Before Installation
2.1 About This Product
Hitachi proudly introduces the New SET FREE
"air365 Max" series, the highly-efficient and
reliable air-conditioning system. Recently,
increased numbers of buildings are requiring
"Intelligent" facilities - communication networks,
office automation, and a comfortable environment.
Particularly, comfortable space is required all the
day through the year in office buildings.
This multi-split system air conditioner, SET FREE
"air365 Max" series can meet these requirements.
The proven combination of the scroll compressor
and the inverter provides the best air conditioning
for small/medium office buildings.
•
SYSTEM FREE System
HITACHI has developed the SYSTEM FREE
system with its customers always in mind.
This system, which is unique in the world,
8
allows the interconnection of the same indoor
units for all the HITACHI systems.
This system provides the end user with greater
flexibility for installation, which means that the
air-conditioning systems will integrate better
with the whole of the installations that make
up the building.
•
Wide Product Range of Outdoor Units
Space, structure and necessary functions,
in line with evolution in building design, the
requirements for air conditioning have also
*1
diversified.
•
About Refrigerant
WARNING
•
The design pressure for this product is
4.15 MPa. The pressure of the refrigerant
R410A is 1.4 times higher than that
of the refrigerant R22. Therefore, the
refrigerant piping for R410A must be
thicker than that for R22. Make sure to
use the specified refrigerant piping. If
not, the refrigerant piping may rupture
due to an excessive refrigerant pressure.
Besides, pay attention to the piping
thickness when using copper refrigerant
piping. The thickness of copper
refrigerant piping differs depending on
its material.
NOTICE
•
The refrigerant R410A is adopted. The
refrigerant oil tends to be affected by
foreign matters such as moisture, oxide
film, (or fat). Perform the installation work
with care to prevent moisture, dust, or
different refrigerant from entering the
refrigerant cycle. Foreign matter can be
introduced into the cycle from such parts as
expansion valve and the operation may be
unavailable.
•
To prevent the different refrigerant or
refrigerant oil from being mixed into the
cycle, the sizes of the charging connections
have been changed from R407C type and
R22 type.
It is necessary to prepare the following tools
before performing the installation work.
•
Use refrigerant pipes and joints which can
be used for R410A.
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