Before Installation; About This Product - Hitachi Air 365 Series Installation And Maintenance Manual

2. Before Installation

2. Before Installation

2.1 About This Product

HITACHI proudly introduces the New SET FREE "air365" 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" 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, 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 diversified.
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About Refrigerant
WARNING
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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.
•
Necessary Tools and Instruments List for Installation
Tool
No.
1 Handsaw
2 Phillips Screwdriver
3 Vacuum Pump
4 Refrigerant Gas Hose
5 Megohmmeter
6 Copper Pipe Bender
Manual Water Pump
7
(for Indoor Unit)
Use tools and measuring instruments only for the new refrigerant R410A as they come into direct contact with the refrigerant.
7
No. Tool
8 Plier
9 Pipe Cutter
10 Brazing Kit
11 Hexagon Wrench
12 Spanner
13 Weigher
14 Charging Cylinder
15 Gauge Manifold
No. Tool
16 Cutter for Wires
17 Gas Leak Detector
18 Leveller
19 Clamper for Solderless Terminals
20 Hoist (for Indoor Unit)
21 Ammeter
22 Voltage Meter
23 Wrench
A16381E84N-rev.1