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Are there scratches or dents on the existing pipes?
NO
Is it possible to operate the existing air conditioner?
YES
• After the existing air conditioner is operated in
cooling mode for approx. 30 minutes or longer,*
recover the refrigerant.
• For cleaning the pipes and recovering oil
• Refrigerant recovery: Pump down method
• Remove the existing air conditioner from the piping
and carry out flushing (nitrogen pressure 0.5 MPa)
to remove any remains inside of the pipe.
Note: In case of twin pipes, also be sure to flush the
branching pipe.
Was largely discolored oil or a large quantity of
remains discharged?
(When the oil deteriorates, the color of the oil
changes to a muddy or black color.)
NO
Connect the indoor / outdoor units to the existing pipe.
• Use a flare nut attached to the main unit for the
indoor / outdoor units. (Do not use the flare nut of
the existing pipe.)
• Re-machine the flare machining size to size for
R410A.
• (Airtight test), Vacuum dry, Refrigerant charge, Gas
leak check
Test run
35-EN
YES
Existing pipes: Cannot be used.
• Use new pipes.
NO
Nitrogen gas pressure 0.5 MPa
(If there is discharge of remains, it is judged that a
large quantity of remains are present.)
YES
Clean the pipes or use new pipes.
Piping necessary to change the flare nut / machining
size due to pipe compression
1) Flare nut width: H
(in (mm))
Copper pipe
1/4"(6.4)
3/8"(9.5)
1/2"(12.7)
outer diameter
For
0.67"(17)
0.87"(22)
1.02"(26)
H
R410A
2) Flare machining size: A
(in (mm))
Copper pipe
A
1/4"(6.4)
3/8"(9.5)
1/2"(12.7)
outer diameter
For
0.36"(9.1) 0.52"(13.2) 0.65"(16.6)
R410A
Becomes a little larger for R410A
Do not apply refrigerator oil to the flare surface.
15
Specifications
This product contains fluorinated greenhouse gases covered by the Kyoto Protocol
Chemical Name of Gas
Global Warming Potential (GWP) of Gas
CAUTION
1. Paste the enclosed refrigerant label adjacent to the charging and/or recovering location.
2. Clearly write the charged refrigerant quantity on the refrigerant label using indelible ink. Then, place the
included transparent protective sheet over the label to prevent the writing from rubbing off.
3. Prevent emission of the contained fluorinated greenhouse gas. Ensure that the fluorinated greenhouse
gas is never vented to the atmosphere during installation, service or disposal. When any leakage of the
contained fluorinated greenhouse gas is detected, the leak shall be stopped and repaired as soon as
possible.
4. Only qualified service personnel are allowed to access and service this product.
5. Any handling of the fluorinated greenhouse gas in this product, such as when moving the product or
recharging the gas, shall comply under (EC) Regulation No. 842/2006 on certain fluorinated greenhouse
gases and any relevant local legislation.
6. Periodical inspections for refrigerant leaks may be required depending on European or local legislation.
7. Contact dealers, installers, etc., for any questions.
� 18 �
R410A
1,975
EN
36-EN
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