Toshiba RAV-GM2241AT8-E Installation Manual page 74

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.
• Refer to "13 Refrigerant recovery"
• For cleaning the pipes and recovering oil
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.
Set up SW01 and SW02 for existing piping switch.
(Refer to "13 Existing Piping")
• 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 R32.
• (Airtight test), Vacuum dry, Refrigerant charge, Gas
leak check
Test run
145-EN
YES
Existing pipes: Cannot be used.
• Use new pipes.
NO
YES
Clean the pipes or use new pipes.
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146-EN