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Explanation of symbols displayed on the indoor unit or outdoor unit.
This symbol shows that this appliance uses a fl ammable
refrigerant.
WARNING
If the refrigerant is leaked and exposed to an external igni-
tion source, there is a risk of fi re.
This symbol shows that the operation manual should be
CAUTION
read carefully.
This symbol shows that a service personnel should be
CAUTION
handling this equipment with reference to the installation
manual.
This symbol shows that information is available such as
CAUTION
the operating manual or installation manual.
2. PRODUCT SPECIFICATION
2.1. Installation tools
Tool name
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.
Gauge manifold
It is recommended to use 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.
To increase pressure resistance, the hose material and base
Charge hose
size were changed. (R32/R410A)
A conventional vacuum pump can be used by installing a
Vacuum pump
vacuum pump adapter.
(Use of a vacuum pump with a series motor is prohibited.)
Special gas leakage detector for HFC refrigerant R410A or
Gas leakage detector
R32.
■ 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 value or
capillary tube may become blocked with contaminants.
As an air conditioner using R32 (R410A) incurs pressure higher than when using R22, it is
necessary to choose adequate materials.
• Do not use the existing (for R22) piping and fl are nuts.
If the existing materials are used, the pressure inside the refrigerant cycle will rise and
cause failure, injury, etc. (Use the special R32/R410A materials.)
• Use (refi ll or replace with) specifi ed refrigerant (R32) only. Use of unspecifi ed refriger-
ant can cause product malfunction, burst, or injury.
• Do not mix any gas or impurities except specifi ed refrigerant (R32). Infl ow of air or ap-
plication of unspecifi ed 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 fi re.
• Do not turn on the power until all work has been completed.
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.
2.2. Accessories
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 to fall,
water leakage, electric shock, or fi re.
• Keep the Installation Manual in a safe place and do not discard any other accessories
until the installation work has been completed.
• The following installation parts are furnished. Use them as required.
En-4
Change from R22 to R32 (R410A)
WARNING
CAUTION
WARNING
Name and Shape
Operating manual
Operating manual
(CD-ROM)
Installation manual
(This manual)
Template
(carton top)
Special nut A
(large fl ange)
Special nut B
(small fl ange)
Drain hose
[VP25(O.D.32, I.D.25)]
2.3. Cassette grille accessories
Name and Shape
Connector cover
Tapping screw
(M5 × 12 mm)
Tapping screw
(M4 × 12 mm)
L angle
Hook wire
Screw [pitch small]
(M4 × 10 mm)
Screw [pitch large]
(M4 × 10 mm)
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
Connection cable (4-conductor)
Wall pipe
Decorative tape
Vinyl tape
Q'ty
Name and Shape
Drain hose insulation
1
Hose band
1
Coupler heat insulation (large)
1
Coupler heat insulation (small)
1
Cable tie (for electrical wiring)
4
Wire clamper (for electrical wir-
ing)
4
1
Q'ty
Description
For covering connector
1
For mounting cassette grille
4
For mounting connector cover
1
For mounting the hook wire to the
cassette grille
2
For suspending the cassette grille
2
For mounting the hook wire (for met-
als)
2
For mounting the L angle and hook
wire (for resins)
4
Wall cap
Saddle
Drain hose
Tapping screws
Putty
Q'ty
1
1
1
1
2
1
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