Specifications

2
Apartments
The common areas and individual room spaces in
apartment blocks have differing air conditioning needs.
What is required is an air conditioning system that pro-
vides comfortable conditions and is economical and
surroundings conscious.
Homes
Homes need individual air conditioning control for
specific rooms that can also be easily switched to
standby mode if the occupants have to go out at short
notice.
Compact VRF System for use in apartments, homes, shops, offices
A range which allows an unlimited combination of indoor and outdoor units accord
Outdoor units
AO54U AO54F
P4, P5
Indoor units
AU7 / AU9 / AU12 /
AU14 / AU18
AU20 / AU25 / AU30
AU36 / AU45 / AU54 AR7 / AR9
AR12 / AR14 / AR18 /
AR22
P16P14 P15
Heat pump type Cooling only type
R410A R410A
Slim Type
The compact VRF System provides economical and comfortable air conditioning
for wide range of applications from living space to business space.
High-performance air conditioning system
High-performance air conditioning system
Cassette type (Compact) Cassette type Duct type (Compact)
AR25 / AR30 /
AR36 / AR45
P17
Duct type
27
Before work, check the refrigerant used and prepare materials matched to the refrigerant.
Copper pipe
outside diameter( )
Tool name
Pipe cutter
Flaring tool
Torque wrench (1/2, 5/8)
Expander
Pipe bender
Nitrogen gas
Welder
Gauge manifold
Charging hose
Vacuum pump(with adaptor)
Electronic scale for refrigerant charging
Gas leak tester
Pipe cutting
Pipe flaring work
Refrigerant piping work
Air tightness test
Vacuum drying
Refrigerant additional charging
Flare nut connection
Expansion at pipe connection
Pipe bending work
Pipe interior oxidation prevention
Pipe brazing
Gas leakage test
Copper pipe
wall thickness (mm)
6.35
0.8
9.52
0.8
12.70
0.8
15.88
1.0
19.05
1.2
Water
Dirt
Dry Clean
No water inside No dirt inside
Use the correct refrigerant piping and materials for R410A.
For the pipe wall thickness, see the table below.
Piping material
R410A work requires a number of special tools ( symbol).
Since tools used in R22 work cannot be used, provide the tools separately.
Tools
Work precautions
Observe the basics (dry, clean) of refrigerant piping and carry
out work so that problems will not occur. Moreover, when per-
forming welding work, seal in nitrogen gas and perform work so
that an oxide film is not produced.
Refrigerant check
Refrigerant piping
Conduct a pressure test sufficiently and make sure there is no refrigerant leakage.
Leak pressure test
If the vacuum pump does not have a reverse flow check mechanism, use the pump together
with a reverse flow check adapter.
Vacuum drying
Charge only the amount of R410A refrigerant calculated in the additional refrigerant charge
calculation. This refrigerant should ony be charged in a liquid form.
Additional refrigerant
Air tightness test ~
Refrigerant additional charging
Variable Refrigerant Flow System
TM
Process and application
Material
JIS H3300 C1220T-O or equivalent
1)
Copper
1) Allowable tensile stress 33 (N/mm );
>
=
2
2) Design pressure 4.2MPa.
2)
Note: Always observe and follow the necessary local regulations when installing refrigerant piping.
Vacuum evacuation and refrig-
erant charging operation check