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2.Install so the direction of the air from the blowing outlet will be
perpendicular to the direction of the wind.
Wind direction
2. REFRIGERANT PIPING WORK
1) Restrictions on unit installation and use
●
Check the following points in light of the indoor unit specifications and the installation site.
●
Observe the following restrictions on unit installation and use. Improper installation can result in a compressor failure or performance degradation.
●
Additional refrigerant charge is not required at all.
Restrictions
Main pipe length
When the outdoor unit is positioned higher,
Elevation difference between
indoor and outdoor units
When the outdoor unit is positioned lower,
●
The use restrictions appearing in the table above are applicable to the standard pipe size combinations shown in the table below.
CAUTION
2) Determination of pipe size
●
Determine refrigerant pipe size pursuant to the following guidelines based on the
indoor unit specifications.
Outdoor unit connected
Refrigerant piping (branch pipeL)
Indoor unit connected
3) Refrigerant pipe wall thickness and material
●
Select refrigerant pipes of the table shown on the right wall thickness and
material as specified for each pipe size.
●
Select pipes having a wall thickness larger than the specified
NOTE
minimum pipe thickness.
4) On-site piping work
Take care so that installed pipes may not touch components within a unit.
IMPORTANT
If touching with an internal component, it will generate abnormal sounds and/or vibrations.
How to remove the side cover
Please remove the screw of a side cover and remove to the front.
●
Carry out the on site piping work with the operation valve fully closed.
●
Give sufficient protection to a pipe end (compressed and blazed, or with an adhesive tape) so
that water or foreign matters may not enter the piping.
●
Bend a pipe to a radius as large as practical.(R100∼R150) Do not bend a pipe repeatedly to correct
its form.
●
Flare connection is used between the unit and refrigerant pipe. Flare a pipe after engaging a
flare nut onto it. Flare dimensions for R410A are different from those for conventional R407C.
Although we recommend the use of flaring tools designed specifically for R410A, conventional
flaring tools can also be used by adjusting the measurement of protrusion B with a protrusion
control gauge.
●
The pipe should be anchored every 1.5m or less to isolate the vibration.
●
Tighten a flare joint securely.
CAUTION
Do not apply force beyond proper fastening torque in tightening the flare nut.
Fix both liquid and gas operation valves at the valve main bodies as illustrated on the right, and then fasten
Wind direction
Dimensional restrictions
Marks appearing in the drawing on the right
15m or less
10m or less
10m or less
When pipe is brazing.
About brazing
Model 09, 12
Brazing must be performed under a nitrogen gas flow.
Gas pipe
Liquid pipe
Without nitrogen gas, a large quantity of foreign matters (oxidized film) are created,
φ9.52
φ6.35
causing a critical failure from capillary tube or expansion valve clogging.
Flare
Flare
φ9.52
φ6.35
φ9.52
φ6.35
Pipe diameter [mm]
Minimum pipe wall thickness [mm]
Pipe material*
*Phosphorus deoxidized seamless copper pipe ICS 23.040.15, ICS 77.150.30
●
Install the unit in a level area. (With a gradient of 5 mm or less.)
Improper installation can result in a compressor failure, broken piping within the unit and abnormal noise generation.
H
L
H
H
Outdoor unit
Primary side
Secondary side
Plug the end of the pipe with tape, or other
Station valve
material, and fill the pipe with nitrogen gas.
0.5MPa
Hand
＜N
＞
Taping
2
Nitrogen
Relief valve
gas
Only use nitrogen gas (N
)
2
Brazing
6.35
9.52
0.8
0.8
O-type pipe
O-type pipe
A
Side cover
The screw of the side cover
is tightened securely.
Indoor unit
L
Flared pipe end : A
(mm)
Copper
0
pipe outer
Ａ
ー0． 4
diameter
φ6.35
9． 1
φ9.52
13.2
Copper pipe protrusion for flaring : B
(mm)
Copper
In the case of a rigid (clutch) type
pipe outer
With an R410A tool With a conventional tool
diameter
φ6.35
0∼0.5
1.0∼1.5
φ9.52
4. ELECTRICAL WIRING
Electrical installation work must be performed by an
Electrical installation work must be executed accordi
Do not use any supply cord lighter than one spe
●
braided cord (code designation 60245 IEC 51),
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ordinary tough rubber sheathed cord (code des
●
flat twin tinsel cord (code designation 60227 IE
●
Use polychloroprene sheathed flexible cord (cod
Ground the unit. Do not connect the grounding wire to
●
If impropery grounded, an electric shock or mal
A grounding wire must be connected before con
●
The installation of an impulse withstanding type
●
acccident such as an electric shock or a fire.
Do not turn on the power until the electrical wor
●
Do not use a condensive capacitor for power fac
●
an abnormal overheat accident)
For power supply cables, use conduits.
●
Do not lay electronic control cables (remote cont
●
in the malfunctioning or a failure of the unit due
Fasten cables so that may not touch the piping,
●
When cables are connected, make sure that all e
●
terminal connection and then attach the cover s
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