En-4
2.2. Accessories
WARNING
For installation purposes, be sure to use the parts supplied by the manufacturer or
other prescribed parts. The use of non-prescribed parts can cause serious accidents
such as the unit falling, water leakage, electric shock, or
fi
re.
• The following installation parts are supplied. Use them as required.
• Keep the Installation Manual in a safe place and do not discard any other accessories
until the installation work has been completed.
Name and shape
Q’ty
Description
Installation manual
1
This manual
Drain pipe
1
For outdoor unit drain piping work
(May not be supplied, depending on
the model.)
Drain cap
3
One-touch bush
2
For power supply cable and connection
cable installation
2.3. Pipe requirements
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
R32(R410A) incurs pressure higher than when using conventional refrigerant, it is
necessary to choose adequate materials.
• Thicknesses of copper pipes used with R32(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
Pipe outside diameter [mm (in.)]
Thickness [mm]
6.35 (1/4)
0.80
9.52 (3/8)
0.80
12.70 (1/2)
0.80
15.88 (5/8)
1.00
19.05 (3/4)
1.20
2.3.1. Refrigerant pipe size and allowable piping length
CAUTION
• Keep the piping length between the indoor unit and outdoor unit within the allowable
tolerance.
• The maximum lengths of this product are shown in the table. If the units are further
apart than this, correct operation cannot be guaranteed.
Single type installation
Capacity [Btu/h class]
30,000
*1
36,000
45,000
54,000
Pipe diameter <Liquid/Gas>
(Standard)
[mm (in.)]
9.52 (3/8) / 15.88 (5/8)
Max. piping length (L1)
[m]
30
*2
Min. piping length (L1)
[m]
5
Max. height difference (H1)
<Indoor unit to outdoor unit>
[m]
30
View (Example)
L1
H1
*1: For the single phase type only.
*2: For the standard pipe diameter.
2.3.2 Connectable pipe diameter and max piping length
The
fi
gures enclosed by a thick-lined frame indicate the standard pipe diameter and max.
piping length.
Single type installation
Capacity [Btu/h class]
30,000
*1
/ 36,000 / 45,000 / 54,000
Pipe diameter
[mm (in.)]
Liquid pipes
9.52 (3/8)
Gas pipes
15.88 (5/8)
Piping length
[m (m)]
Max. piping
length < L1 >
*2
(Pre-charge length)
30
[30]
*1: For the single phase type only.
*2: Refer to “View” in the table of “2.3.1. Refrigerant pipe size and allowable piping length
Single type installation”.
2.3.3. Protection of pipes
• Protect the pipes to prevent the entry of moisture and dust.
• Especially, pay attention when passing the pipes through a hole or connecting the
end of a pipe to the outdoor unit.
Location
Working period
Protection method
Outdoor
1 month or more
Pinch pipes
Less than 1 month
Pinch or tape pipes
Indoor
-
Pinch or tape pipes
2.4. Electrical requirements
CAUTION
• Be sure to install a breaker of the speci
fi
ed capacity.
• Before the electrical work, con
fi
rm electrical standards and regulations in each
country, region, or installing place. Then select appropriate cables and breakers that
comply with them.
• Equipment complying with IEC/ EN 61000-3-12
• This unit must be connected to a power supply with impedance of 0.419 ohm and below.
If the power supply does not satisfy this requirement, please consult the power supplier.
Cable
Phase
Cable
size
[mm²]
Type
Remarks
Power Supply Cable
Single
Min. 4
Type60245 IEC66
2 Cable + Earth
(Ground)
1
Φ
230 V
Three
Min. 2.5
Type60245 IEC57
4 Cable + Earth
(Ground)
3
Φ
400 V
Connection Cable
Single
Min. 1.5
Type60245 IEC57
3 Cable + Earth
(Ground)
1
Φ
230 V
Three
Min. 1.5
Type60245 IEC57
3 Cable + Earth
(Ground)
3
Φ
400 V
Cable Length: Limit voltage drop to less than 2%. Increase cable gauge if voltage drop is
2% or more.
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