Toshiba RAV-GP1101AT8-E Manuel D'installation page 90

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 model name:
RBC-TWP30E, RBC-TWP50E, RBC-TRP100E
On the existing air conditioner for simultaneous
operation system (twin, triple 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
Outdoors
Less than
1 month
Indoors Every time
EN-177
Pinching
Pinching or
taping
- 89 -
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
• 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 size to size for R32.
• (Airtight test), Vacuum dry, Refrigerant charge, Gas leak
check
Test run
YES
Existing pipes: Cannot be used.
• Use new pipes.
NO
YES
Clean the pipes or use new pipes.
EN-178