Toshiba XXXXXXX(<SanSerif1>X/X)
– 24 –
EN
Digital Inverter
Outdoor Unit Installation Manual
H
A
Is there no scratch or dent on the existing pipes?
Is it possible to operate the existing air conditioner?
• For cleaning the pipes and recovering of oil
• After the existing air conditioner operated in cooling mode
for approx. 30 minutes or longer*, recover the refrigerant.
• Refrigerant recovery: Pump down method
• Remove the existing air conditioner from the piping and
carry out flashing (nitrogen pressure 0.5 Mpa) to remove
the remains inside of the pipe.
Note]
In case of twin, also be sure to flash the
branching pipe.
Was not largely discolored oil or
a large quantity of remains discharged?
(When the oil deteriorates, the color of the
oil changes to muddy and black color.)
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.
In case that the gas pipe
Ø
19 mm is used for the outdoor
unit of SP80 (3 HP) or bigger:
(Gas pipe size of our R410A model 3 to 6HP is
Ø
15.9 mm)
➞
Turn the existing pipe switch on the cycle control P.C
board of the outdoor unit to ON side.
At shipment from factory OFF
➞
ON for existing pipe
(Refer to the table below.) (Be sure to set the contents
in the table below in order to restrict the refrigerating
cycle pressure of the equipment in the pipe standard.)
Existing pipe SW
Switch
6 HP
Bit 5 of SW801
➞
ON
• (Airtight test), Vacuum dry, Refrigerant charge, Gas leak
check
Trial run
Existing pipes: Can not be used.
• Use a new pipes.
NO
YES
YES
Nitrogen gas pressure 0.5 Mpa
(If there is discharge of remains,
it is judged that there is a large quantity of remains.)
Clean the pipes or use the new pipes.
Piping necessary to change the flare nut/
machining size due to pipe compression.
1) Flare nut width: H
2) Flare machining size: A
(mm)
Copper pipe
outer dia.
Ø6.4
Ø9.5
Ø12.7
Ø15.9
Ø19.0
For R410A
17
22
26
29
36
For R22
Same as above
24
27
Same as
above
(mm)
Becomes large a little for R410A
Copper pipe
outer dia.
Ø6.4
Ø9.5
Ø12.7
Ø15.9
Ø19.0
For R410A
9.1
13.2
16.6
19.7
24.0
For R22
9.0
13.0
16.2
19.4
23.3
Do not apply the refrigerator oil to the flare surface.
YES
NO
NO
24-EN
+00EH99861901_01EN_Outdoor6HP_IM.book Page 24 Monday, June 2, 2008 6:00 PM
