En-4
When an obstruction is present also in the upward area
When there are •
obstacles at the
back, side(s), and
top
100-300 mm*
250 mm or more
(Service space)
300 mm
or more
600-1000 mm*
AIR
※If the space is larger than that is stated, the condition will be the same as that there are no
obstacles.
3.3.2. Multiple outdoor unit installation
Provide at least 250 mm of space between the outdoor units if multiple units are •
installed.
When routing the piping from the side of an outdoor unit, provide space for the piping.•
No more than 3 units must be installed side by side. •
When 3 units or more are arranged in a line, provide the space as shown in the
following example when an obstruction is present also in the upward area.
When there are obstacles at the back side with the installation of more than one •
unit.
250 mm
or more
250 mm
or more
300 mm
or more
AIR
3.4. Transporting the unit
WARNING
Do not touch the ns.
Otherwise, personal injury could result.
CAUTION
When carrying the unit, hold the handles on the right and left sides and be careful.
If the outdoor unit is carried from the bottom, hands or ngers may be pinched.
Be sure to hold the handles on the sides of the unit. Otherwise, the suction grilles on •
the sides of the unit may be deformed.
Handle
3.5. Installation
(Unit : mm)
4 - Φ 12 Hole
132
AIR
650 119
50 50
16
370
Install 4 anchor bolts at the locations indicated with arrows in the above gure.•
To reduce vibration, do not install the unit directly on the ground. Install it on a secure •
base (such as concrete blocks).
The foundation shall support the legs of the unit and have a width of 50 mm or more.•
Depending on the installation conditions, the outdoor unit may spread its vibration •
during operation, which may cause noise and vibration. Therefore, attach damping
materials (such as damping pads) to the outdoor unit during installation.
Install the foundation, making sure that there is enough space for installing the •
connection pipes.
Secure the unit to a solid block using foundation bolts. •
(Use 4 sets of commercially available M10 bolts, nuts, and washers.)
The bolts should protrude 20 mm. •
(Refer to the gure below.)
If overturning prevention is required, purchase the necessary commercially available •
items.
Bolt
20 mm
Nut
Block
Fix securely with bolts on a solid block. (Use 4 sets of commercially available M10 bolt,
nut and washer.)
sd
4. PIPE SELECTION
4.1. Selecting the pipe material
CAUTION
Do not use existing pipes.
Use pipes that have clean external and internal sides without any contamination which
may cause trouble during use, such as sulfur, oxide, dust, cutting waste, oil, or water.
It is necessary to use seamless copper pipes.
Material: Phosphor deoxidized seamless copper pipes.
It is desirable that the amount of residual oil is less than 40 mg/10 m.
Do not use copper pipes that have a collapsed, deformed, or discolored portion
(especially on the interior surface).
Otherwise, the expansion valve or capillary tube may become blocked with
contaminants.
Improper pipe selection will degrade performance. As an air conditioner using R410A
incurs pressure higher than when using conventional refrigerant, it is necessary to
choose adequate materials.
Thicknesses of copper pipes used with R410A are as shown in the table.•
Never use copper pipes thinner than those indicated in the table even if they are •
available on the market.
Thicknesses of Annealed Copper Pipes (R410A)
Pipe outside diameter [mm (in.)] Thickness [mm]
9.52 (3/8) 0.80
15.88 (5/8) 1.00
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