En-4
Tool name
Contents of change
Gauge manifold
Pressure is high and cannot be measured with a conventional
(R22) gauge. To prevent erroneous mixing of other refriger-
ants, the diameter of each port has been changed.
It is recommended the gauge with seals -0.1 to 5.3 MPa (-1
to 53 bar) for high pressure. -0.1 to 3.8 MPa (-1 to 38 bar) for
low pressure.
Charge hose
To increase pressure resistance, the hose material and base
size were changed. (R32/R410A)
Vacuum pump
A conventional vacuum pump can be used by installing a
vacuum pump adapter.
(Use of a vacuum pump with a series motor is prohibited.)
Gas leakage detector
Special gas leakage detector for HFC refrigerant R410A.
Copper pipes
It is necessary to use seamless copper pipes and it is desirable that the amount of
residual oil is less than 40 mg/10 m. Do not use copper pipes having a collapsed,
deformed or discolored portion (especially on the interior surface). Otherwise, the
expansion valve or capillary tube may become blocked with contaminants.
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 that in the table even when it is 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
2.2. 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.)
3. GENERAL SPECIFICATION
3.1. Selecting circuit breaker and wiring
CAUTION
Be sure to install a breaker with speci
fi
ed capacity.
Before the electrical working, con
fi
rm electrical standards and regulations in each
country, region, or installing place. Then select appropriate cables and breakers that
comply with them.
Voltage rating
1
Φ
230 V (50 Hz)
Operating range
198 to 264 V
Cable
Conductor size [mm²]
*1
Type
Remarks
Power Supply Cable
09 type
2.5
Type60245 IEC57
2 wire + Ground
1
Φ
230 V
12 type
4.0
Type60245 IEC66
Connection Cable
09,12 type
1.5
Type60245 IEC57
3 wire + Ground
1
Φ
230 V
*1
Selected sample: Select the correct cable type and size according to the country or
region’s regulations.
Max. wire length: Set a length so that the voltage drop is less than 2%. Increase the wire
diameter when the wire length is long.
Breaker capacity
[A]
Earth leakage breaker
[mA]
09 type
16
30
12 type
20
• Selected sample: Select the correct cable type and size according to the country or
region’s regulations.
• Select the breaker that enough load current can pass through it.
• Before starting work check that power is not being supplied to all poles of the indoor
unit and outdoor unit.
• Install all electrical works in accordance to standard.
• Install the disconnect device with a contact gap of at least 3mm in all poles nearby
the units. (Both indoor unit and outdoor unit)
• Wiring size must comply with the applicable local and national code.
3.2. 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
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
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
3.4. 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.
Pipe diameter <Liquid/Gas> [mm (in.)]
6.35 (1/4) / 9.52 (3/8)
Max. piping length (L) [m]
15
Min. piping length (L) [m]
5
Max. height difference (H)
<Indoor unit to outdoor unit> [m]
10
View (Example)
H
L
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