En-4
[For
1
Rear piping,
2
Right piping and
3
Bottom piping]
• The drain hose and drain cap are used as they are.
[For
4
Left bottom piping,
5
Left piping and
6
Center piping,
7
Left rear
piping]
• Remove the drain cap and drain hose. Mount the drain cap and drain hose to the drain
port on its opposite side.
Left side
Right side
Drain cap
Drain hose
Drain cap
Drain hose
Insert the drain hose until it butts
against the drain port.
Insert the drain cap until it butts
against the drain port.
3.3.4. Cut-out for piping on front cover
[For
2
Right piping,
3
Bottom piping,
4
Left bottom piping and
5
Left pip-
ing]
• Use a metal shears or other cutting tool to cut along the groove in the plastic for the
piping that will coming out of the front cover.
For
2
Right piping
For
5
Left piping
For
4
Left bottom piping
For
3
Bottom piping
4. PIPE
INSTALLATION
CAUTION
Be more careful that foreign matter (oil, water, etc.) does not enter the piping than with
refrigerant R410A models. Also, when storing the piping, securely seal the openings by
pinching, taping, etc.
While welding the pipes, be sure to blow dry nitrogen gas through them.
4.1. Selecting the pipe material
CAUTION
Do not use existing pipes from another refrigeration system or refrigerant.
Use pipes that have clean external and internal sides without any contamination which
may cause trouble during use, such as sulfur, oxide, dust, cutting waste, oil, or water.
It is necessary to use seamless copper pipes.
Material : Phosphor deoxidized seamless copper pipes
It is desirable that the amount of residual oil is less than 0.04 oz/100 ft (40 mg/10 m).
Do not use copper pipes that have a collapsed, deformed, or discolored portion (es-
pecially on the interior surface). Otherwise, the expansion valve or capillary tube may
become blocked with contaminants.
Improper pipe selection will degrade performance. As an air conditioner using R410A
incurs pressure higher than when using conventional (R22) refrigerant, it is necessary to
choose adequate materials.
• Thicknesses of copper pipes used with R410A are as shown in the table.
• Never use copper pipes thinner than those indicated in the table even if they are avail-
able on the market.
Wall hook bracket
Tapping screw (big)
3.3.2. Cutting the hole in the wall for the connecting piping
WARNING
If the wall pipe is not used, the cable may touch metal and cause electric leakage.
(1) Cut a 3-1/8 in (80 mm) diameter hole in the wall at the position shown in Fig. B.
(2) For
1
Rear piping and
7
Left rear piping, cut the hole to a point of intersection of
center marks (Fig. B).
For
2
Right piping and
5
Left piping, cut the hole at least 3/8 in (10 mm) below the
holes for the rear piping and left rear piping for the drain water to
fl
ow freely (Fig. B).
For
6
Center piping, cut a hole in the lower, center section of the wall hook bracket.
(Refer to Fig. A. Do not cut a hole outside of the indoor unit outline.)
(3) Cut the hole so that the outside end is lower 3/16 to 3/8 in (5 to 10 mm) than the
inside end.
(4) Always align the center of the wall hole. If misaligned, water leakage will occur.
(5) Cut the wall pipe to match the wall thickness, stick it into the wall cap fasten with
vinyl tape, and stick the pipe through the hole.(The connection pipe is supplied in the
installation set.)
(6) For left piping and right piping and center piping, cut the hole a little lower so that
drain water will
fl
ow freely.
Fig. B
3-1/8 in
80 mm
dia. hole
(For
2
Right pip-
ing)
Lower
3-1/8 in
(80 mm)
dia. hole
Center mark
Lower
3/8 in
(10 mm)
or more
(For
5
Left pip-
ing)
(For
1
Rear
piping)
(For
7
Left rear
piping)
3/8 in
(10 mm)
or more
Wall hook bracket
Fasten with
vinyl tape
Wall cap*
Wall pipe*
(Inside)
Wall
(Outside)
*Locally purchased
3/16 to 3/8 in
(5 to 10 mm) low
3.3.3. Attach the drain hose
CAUTION
Insert the drain hose and drain cap into the drain port, making sure that it comes in con-
tact with the back of the drain port, and then mount it. If the drain hose is not connected
properly, leaking will occur.
• Wrap the insulation around the drain hose, making sure that there are no gaps.
• Attach the Insulation (Drain hose) to the drain hose.
Drain hose
Insulation (Drain hose)
(Accessories)
9373370444_IM.indb 4
9373370444_IM.indb 4
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