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1
INSTALLATION OF NEW REFRIGERANT AIR CONDITIONER
This air conditioner adopts the new HFC refrigerant (R410A) which does not deplete the ozone layer.
R410A refrigerant is apt to be affected by impurity such as water, oxidizing membrane, or oils because the
pressure of R410A refrigerant is higher than that of the former refrigerant by approx. 1.6 times. Accompanied with
adoption of the new refrigerant, refrigerating oil has been also changed. Therefore pay attention so that water,
dust, former refrigerant, or refrigerating oil does not enter into the refrigerating cycle of the new refrigerant air
conditioner during installation work.
To prevent from mixing of refrigerant or refrigerating oil, the size of charge port of the main unit or connecting
section of installation tool differs from that of the air conditioner for the former refrigerant. Accordingly the
exclusive tools are required for the new refrigerant (R410A) as shown below.
For connecting pipes, use the new and clean piping materials so that water or dust does not enter.
Required tools and cautions on handling
It is necessary to prepare the tools and parts as described below for the installation work.
The tools and parts which will be newly prepared in the following items should be restricted to the exclusive use.
Explanation of symbols
l
: Newly prepared (It is necessary to use it properly exclusive to R410A separated from those for R22 or R407C.)
¡ : Former tool is available.
Used tools
Gauge manifold
Charging hose
Charging cylinder
Gas leak detector
Vacuum pump
Vacuum pump with counter-
flow preventive adapter
Flare tool
Bender
Refrigerant recovery device
Torque wrench
Pipe cutter
Refrigerant cylinder
Welding machine/
Nitrogen gas cylinder
Refrigerant charging balance
Usage
Vacuuming or charging of
refrigerant and operation check
Charges refrigerant
Checks gas leak
Vacuum drying
Vacuum drying
Flare processing of pipes
Bending processing of pipes
Recovers refrigerant
Tightens flare nut
Cuts pipes
Charges refrigerant
Welding of pipes
Charges refrigerant
Proper use of tools/parts
l
Newly prepared, Exclusive to R410A
l
Newly prepared, Exclusive to R410A
Unusable (Use the Refrigerant charging balance.)
l
Newly prepared
Usable if a counter-flow preventive adapter is attached
¡
: R22 (Existing article)
¡
: Usable by adjusting size
¡
: R22 (Existing article)
l
Exclusive to R410A
l
Newly prepared, exclusive to Ø12.7mm and Ø15.9mm
¡
: R22 (Existing article)
l
Exclusive to R410A
ID : Refrigerant name entered
¡
: R22 (Existing article)
¡
: R22 (Existing article)
6


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