2. PRODUCT SPECIFICATION
2.1. Installation tools
Tool name
Change from R22 to R32 (R410A)
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.
WARNING
• 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.
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.
2.2. 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 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 accessories are supplied. Use them as required.
Name and Shape
Q’ty
Name and Shape
Q’ty
Operating manual
Cable tie (large)
1
4
Operating manual
Cable tie (medium)
(CD-ROM)
1
3
Installation manual
Filter (large)
(This manual)
[18 model]
1
2
Installation template
Filter (small)
[07, 09,12,14 model]
2
1
Washer
Drain hose
1
8
En-4