English 8
(1) For rear side piping
• Remove the rear piping penetration cover, and connect
the piping. (Refer to Fig. 16 and Fig. 18)
(2) For upward piping
• For upward piping, L-shaped connection piping kit
(optional accessory) will be required.
• Remove the top panel penetration cover, and use the L-
shaped connection piping kit (optional accessory) to con-
duct piping. (Refer to Fig. 16 and Fig. 17)
(3) For right side piping
• Remove the stay for packing and delivering (reinforcing
plate) at the right side, and put back the screw to the orig-
inal position of the indoor unit. (Refer to Fig. 18)
• Open the knockout hole at the decoration side panel
(right), and connect piping. (Refer to Fig. 18)
• After piping is finished, cut the removed penetration cover
along the shape of piping, and install.
Also, for top panel penetration cover, as it was before
removed, put the horizontal blade motor and thermistor
lead through the clamp of the top panel penetration cover
and fix. (Refer to Fig. 16 and Fig. 19)
When doing this, block any gaps between the piping pen-
etration cover and the piping using putty to prevent dust
from entering the indoor unit.
* Before brazing refrigerant piping, have nitrogen flow through
the refrigerant piping and substitute air with nitrogen. Then,
carry out brazing (NOTE 2). (Refer to Fig. 20) After all the
brazing works are finished, carry out flare connection with the
indoor unit.
1. The proper pressure for having nitrogen flow through the
piping is approximately 0.02MPa, a pressure that makes
one feel like breeze and can be obtained through a pres-
sure reducing valve.
2. Do not use flux when brazing refrigerant piping. Use phos-
phor copper brazing filler metal (BCuP-2: JIS Z 3264/B-
Cu93P-710/795: ISO 3677) that does not require flux. (If
chlorinated flux is used, the piping will be corroded and, in
addition if fluorine is contained, the refrigerant oil will be
deteriorated and the refrigerant circuit will be affected
badly.)
3. When carrying out leakage test of refrigerant piping and the
indoor unit after the installation of indoor unit is finished,
confirm the connecting outdoor unit installation manual for
test pressure. Refer to also the outdoor unit installation
manual or technical document for refrigerant piping.
4. In case of refrigerant shortage due to forgetting additional
refrigerant charge etc., it will result in malfunction such as
does not cool or does not heat. Refer to the outdoor unit
installation manual or technical document for refrigerant
piping.
Do not use antioxidant when brazing piping.
It may result in malfunction of components and clogging of
piping due to residue.
Top panel penetration cover
Cut at the position avoiding
the knob part of the
penetration cover
Rear piping penetration cover
View from
air inlet side
Cutoff
Cutoff
Top panel
Fig. 16
Upward refrigerant piping
L-shaped branch piping kit
(Optional accessory)
Fig. 17
Screw
(put back to the indoor unit)
Decoration side panel (right)
Separating parts
Cut only this part when laying only
the drain piping on the right side.
Stay for packing and delivering
(reinforcing plate)
Right side refrigerant piping
Rear side drain piping
Rear side refrigerant piping
Right side drain piping
Fig. 18
Thermistor lead
Horizontal blade motor lead
Top panel penetration
cover clamp part
Fig. 19
View from air inlet side
Pressure reducing valve
Brazing place
Taping
Stop valve
Nitrogen
Nitrogen
Refrigerant piping
Fig. 20
01_EN_3P368557-1.fm Page 8 Wednesday, December 10, 2014 10:31 AM
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