Toshiba RAV-GM802ATW-E Installation Manual page 31

8. When temporary installation and removal of the air
conditioner are repeated such as when leased, etc.
9. If the type of refrigerator oil of the existing air
conditioner is other than the following oil (Mineral
oil), Suniso, Freol-S, MS (Synthetic oil), alkyl
benzene (HAB, Barrel-freeze), ester series, PVE
only of ether series.
• The winding-insulation of the compressor may
deteriorate.
NOTE
The above descriptions are results have been confirmed
by our company and represent our views on our air
conditioners, but do not guarantee the use of the existing
pipes of air conditioners that have adopted R32 or
R410A in other companies.
Branching pipe for simultaneous
operation system
In the concurrent twin system, when TOSHIBA has
specified that branching pipe is to be used, it can be
reused.
Branching pipe modal name:
RBC-TWP30E2, RBC-TWP50E2
On the existing air conditioner for simultaneous
operation system (twin system), there are cases of
branch pipes being used that have insufficient
compressive strength.
In such case, please change the piping to a branch
pipe for R32 or R410A.
Curing of pipes
When removing and opening the indoor or outdoor unit
for a long time, cure the pipes as follows:
• Otherwise rust may be generated when moisture or
foreign matter due to condensation enters the pipes.
• The rust cannot be removed by cleaning, and new
pipes are necessary.
Placement
Term Curing manner
location
1 month or more Pinching
Outdoors
Less than
1 month
Pinching or taping
Indoors Every time
59-EN
<Flowchart of checking existing pipes>
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 Functions to be implemented locally -
Refrigerant recovery"
• For cleaning the pipes and recovering oil
• Refrigerant recovery: Pump down method
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 size1o size for R32.
• (Airtight test), Vacuum dry, Refrigerant charge, Gas
leak check
Test run
– 30 –
YES
Existing pipes: Cannot be used.
• Use new pipes.
NO
YES
Clean the pipes or use new pipes.
60-EN