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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.
Refer to "13 Refrigerant recovery"
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.
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
43-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
Copper pipe outer
Ø6.4
Ø9.5 Ø12.7 Ø15.9
diameter
For R32, R410A
17
22
26
H
Same as
For R22
24
above
2) Flare machining size: A
Copper pipe outer
Ø6.4
Ø9.5 Ø12.7 Ø15.9
A
diameter
For R32, R410A
9.1
13.2
16.6
For R22
9.0
13.0
16.2
Becomes a little larger for R32/R410A
Do not apply refrigerator oil to the flare surface.
16
Specifications
Model
RAV-GV1101ATP-E
* Under 70 dBA
(mm)
29
27
(mm)
19.7
19.4
– 22 –
Sound power level (dBA)
Cooling
Heating
*
*
Weight (kg)
47
44-EN
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