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CAUTION
This manual describes how to install the indoor unit only. To install the outdoor unit or
branch box, (if any), refer to the installation manual included in each product.
2.3. For authorized service personnel only.
WARNING
• For appropriate working of the air conditioner, install it as outlined in this manual.
• To connect the indoor unit and outdoor unit or branch box, use air conditioner piping
and cables available through your local distributor. This manual describes proper
connections using such installation set.
• Do not reconnect the power until all work has been completed.
CAUTION
This installation manual describes how to install the indoor unit only.
To install the outdoor unit or branch box, refer to the installation manual included with
the outdoor unit or branch box.
• Be careful not to scratch the air conditioner when handling it.
• After installation, explain correct operation to the customer, using the operation manual.
2.4. Accessories
The following installation accessories are supplied. Use them as required.
Name and Shape
Qty
Name and Shape
Qty
Operation manual
1
Tapping screw (large)
8
Installation manual
(This manual)
1
Tapping screw (small)
2
Remote controller
1
Battery
2
Remote controller holder
1
Wall hook bracket
1
Cloth tape
1
Ion deodorization filter
(light blue)
1
Filter holder
2
Apple-catechin filter
(White)
1
Drain hose insulation
1
The following items are necessary to install this air conditioner. (The items are not includ-
ed with the air conditioner and must be purchased separately.)
Additional materials
Connection pipe assembly
Saddle
Connection cable (4-conductor)
Drain hose
Wall pipe
Tapping screw
Decorative tape
Sealant
Vinyl tape
Putty
Wall cap
2.5. Pipe requirement
CAUTION
Refer to the installation manual for the outdoor unit for description of allowable pipe length
and height difference.
Liquid pipe size <thickness>
Gas pipe size <thickness>
Φ3/8in (Φ9.52mm)
<1/16in(0.80mm)>
Φ5/8in (Φ15.88mm)
<1/16in(0.80mm)>
CAUTION
• Do not attempt to install the air conditioner or a part of the air conditioner by yourself.
• This unit must be installed by qualified personnel with a capacity certificate for han
-
dling refrigerant fluids. Refer to regulation and laws in use on installation place.
• This unit is part of a set constituting an air conditioner. It must not be installed alone or
with a device non-authorized by the manufacturer.
• Always use a separate power supply line protected by a circuit breaker operating on
all wires with a distance between contact of 1/8 in (3 mm) for this unit.
• The unit must be correctly grounded (earthed) and the supply line must be equipped
with a differential breaker in order to protect the persons.
• The units are not explosion proof and therefore should not be installed in explosive
atmosphere.
• When moving, consult authorized service personnel for disconnection and installation
of the unit.
• Do not place any other electrical products or household belongings under indoor unit
or outdoor unit.
Dripping condensation from the unit might get them wet, and may cause damage or
malfunction of your property.
2. PRODUCT SPECIFICATION
2.1. Precautions for using R410A refrigerant
The basic installation work procedures are the same as conventional refrigerant
(R22) models.
However, pay careful attention to the following points:
• Since the working pressure is 1.6 times higher than that of conventional refrigerant
(R22) models, some of the piping and installation and service tools are special. (Refer
to the following table.)
Especially, when replacing a conventional refrigerant (R22) model with a new refriger-
ant R410A model, always replace the conventional piping and flare nuts with the
R410A piping and flare nuts.
• Models that use refrigerant R410A have a different charging port thread diameter to
prevent erroneous charging with conventional refrigerant (R22) and for safety. There-
fore, check beforehand. [The charging port thread diameter for R410A is 1/2-20 UNF.]
• Be more careful that foreign matter (oil, water, etc.) does not enter the piping than with
refrigerant (R22) models. Also, when storing the piping, securely seal the opening by
pinching, taping, etc.
• When charging the refrigerant, take into account the slight change in the composition
of the gas and liquid phases. And always charge from the liquid phase where refriger-
ant composition is stable.
2.2. Installation tools
Tool name
Contents of change
Gauge manifold
Pressure is high and cannot be measured with a R22
gauge. To prevent erroneous mixing of other refrigerants,
the diameter of each port has been changed.
It is recommended the gauge with seals -30 inHg to 768 psi
(-0.1 to 5.3 MPa) for high pressure.
-30 inHg to 551 psi (-0.1 to 3.8 MPa) for low pressure.
Charge hose
To increase pressure resistance, the hose material and base
size were changed.
Vacuum pump
A conventional vacuum pump can be used by installing a
vacuum pump adapter.
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 0.004 oz/100 ft. (40 mg/10 m). Do not use copper pipes having a collapsed,
deformed or discolored portion (especially on the interior surface). Otherwise, the expansion
value or capillary tube may become blocked with contaminants.
As an air conditioner using R410A incurs pressure higher than when using R22, it is nec-
essary to choose adequate materials.
WARNING
• Do not use the existing (for R22) piping and flare nuts.
If the existing materials are used, the pressure inside the refrigerant cycle will rise
and cause failure, injury, etc. (Use the special R410A materials.)
• Use (refill or replace with) specified refrigerant (R410A) only. Use of unspecified
refrigerant can cause product malfunction, burst, or injury.
• Do not mix any gas or impurities except specified refrigerant (R410A). Inflow of air
or application of unspecified material makes the internal pressure of the refrigerant
cycle too high, and may cause product malfunction, burst of piping, or injury.
• 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 fire.
• Do not turn on the power until all work has been completed.
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