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CAUTION

12-Recovery

• When removing refrigerant from a system, either for servicing or decommissioning, it

is recommended good practice that all refrigerants are removed safely.

• When transferring refrigerant into cylinders, ensure that only appropriate refrigerant

recovery cylinders are employed.

• Ensure that the correct number of cylinders for holding the total system charge are

available.

• All cylinders to be used are designated for the recovered refrigerant and labelled for

that refrigerant (i.e. special cylinders for the recovery of refrigerant).

• Cylinders shall be complete with pressure relief valve and associated shut-off valves

in good working order.

• Empty recovery cylinders are evacuated and, if possible, cooled before recovery

occurs.

• The recovery equipment shall be in good working order with a set of instructions

concerning the equipment that is at hand and shall be suitable for the recovery of

ammable refrigerants.

• In addition, a set of calibrated weighing scales shall be available and in good working

order.

• Hoses shall be complete with leak-free disconnect couplings and in good condition.
• Before using the recovery machine, check that it is in satisfactory working order, has

been properly maintained and that any associated electrical components are sealed
to prevent ignition in the event of a refrigerant release.
Consult manufacturer if in doubt.

• The recovered refrigerant shall be returned to the refrigerant supplier in the correct

recovery cylinder, and the relevant Waste Transfer Note arranged.

• Do not mix refrigerants in recovery units and especially not in cylinders.
• If compressors or compressor oils are to be removed, ensure that they have been

evacuated to an acceptable level to make certain that

ammable refrigerant does not

remain within the lubricant.

• The evacuation process shall be carried out prior to returning the compressor to the

suppliers.

• Only electric heating to the compressor body shall be employed to accelerate this

process.

• When oil is drained from a system, it shall be carried out safely.

Explanation of symbols displayed on the indoor unit or outdoor unit.

WARNING

This symbol shows that this appliance uses a

ammable

refrigerant.
If the refrigerant is leaked and exposed to an external igni-
tion source, there is a risk of

re.

CAUTION

This symbol shows that the operation manual should be
read carefully.

CAUTION

This symbol shows that a service personnel should be
handling this equipment with reference to the installation
manual.

CAUTION

This symbol shows that information is available such as
the operating manual or installation manual.

2. PRODUCT SPECIFICATION

2. 1. Installation tools

Tool name

Change from R22 to R32 (R410A)

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 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.

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 or
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

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 (re

ll or replace with) speci

ed refrigerant (R32) only. Use of unspeci

ed refriger-

ant can cause product malfunction, burst, or injury.

• Do not mix any gas or impurities except speci

ed refrigerant (R32). In

ow of air or ap-

plication of unspeci

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

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 falling,
water leakage, electric shock, or

re.

• The following installation parts are furnished. 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

Operating Manual

Operating Manual
(CD-ROM)

Installation Manual
(indoor unit)

(This book)

Special nut A
(large

ange)

For suspending the indoor unit
from ceiling

Special nut B
(small