En-4
6.4. Installing the wall hook bracket
(1) Install the wall hook bracket so that it is correctly positioned horizontally and vertically.
If the wall hook bracket is titled, water will drip to the
fl
oor.
(2) Install the wall hook bracket so that it is strong enough to support the weight of the unit.
• Fasten the wall hook bracket to the wall with 5 or more screws through the holes near
the outer edge of the bracket.
• Check that there is no rattle at the wall hook bracket.
Wall hook bracket
Tapping screws (large, accessories)
CAUTION
Install the wall-hook bracket both horizontally and vertically aligned.
Misaligned installation may cause water leakage.
6.5. Forming the drain hose and pipe
CAUTION
• Insert drain hose and drain cap securely. Drain should slope down to avoid water leakage.
• When inserting the drain hose, no other material than water should be applied.
Application of other material than water will cause deterioration of the hose, and may
cause water leakage.
• After you remove a drain hose, be sure to attach the drain cap.
• When you secure the piping and drain hose with tape, arrange the drain hose so that
it is at the bottom of the piping.
• For drain hose piping in low temperature environment, you need to apply freeze
protection to prevent a frozen drain hose.
After cooling operation is performed in low temperature environment, (when outdoor
temperature under 0 °C,) water in the drain hose could be frozen. Frozen drain water
will block the water
fl
ow in the hose, and may cause water leakage at the indoor unit.
[Rear piping, Right piping, Bottom piping]
• Install the indoor unit piping in the direction of the wall hole and bind the drain hose
and pipe together with vinyl tape.
• Install the piping so that the drain hose is at the bottom.
• Wrap the pipes of the indoor unit that are visible from the outside with decorative tape.
Right piping
Bind with vinyl tape
Indoor unit drain hose
(bottom)
Pipe (top)
Rear piping
Bottom piping
[For Left rear piping, Left piping]
Interchange the drain cap and the drain hose.
Drain cap
Indoor unit
drain hose
Remove the drain cap by pull-
ing at the projection at the end
of the cap with pliers, etc.
For left outlet piping, cut
off the piping outlet cutting
groove with a hacksaw.
Installing the Drain cap
Use a hexagonal wrench 4 mm at opposite side to
insert the drain cap, till the drain cap contacts the tip
of the drain cock.
No gap
Hexagonal
wrench
Drain
cock
Drain cap
CAUTION
Insert the drain hose and drain cap into the drain port, making sure that it comes
in contact with the back of the drain port, and then mount it. If the drain hose is not
connected properly, leaking will occur.
• For left piping and left rear piping, align the marks on the wall hook bracket and shape
the connection pipe.
• Bend the connection piping at the bend radius of 100 mm or more and install no more
than 35 mm from the wall.
• After passing the indoor piping and drain hose through the wall hole, hang the indoor unit
on the hooks at the top and bottom of the wall hook bracket.
Wall hook
bracket
Alignment marks
Small piping
Connection
piping
Large piping
[Installing the indoor unit]
• Hang the indoor unit from the hooks at the top of the wall hook bracket.
• Insert the spacer, etc. between the indoor unit and the wall hook bracket and separate
the bottom of the indoor unit from the wall.
Indoor unit
Wall hook bracket
(Spacer)
Top hooks
Indoor
unit
(Fitting)
Bottom hooks
Wall hook
bracket
• After hooking the indoor unit to the top hook, hook the
fi
ttings of the indoor unit to the 2
bottom hooks while lowering the unit and pushing it against the wall.
6.6. Flare connection (Pipe connection)
CAUTION
Tighten the flare nuts with a torque wrench using the specified tightening method.
Otherwise, the
fl
are nuts could break after a prolonged period, causing refrigerant to leak
and generate hazardous gas if the refrigerant comes into contact with a
fl
ame.
6.6.1. Flaring
Use special pipe cutter and
fl
are tool designed for R410A pipework.
(1) Cut the connection pipe to the necessary length with a pipe cutter.
(2) Hold the pipe downward so that cuttings will not enter the pipe and remove any burrs.
(3) Insert
the
fl
are nut (always use the
fl
are nut attached to the indoor unit(s) and outdoor
unit respectively) onto the pipe and perform the
fl
are processing with a
fl
are tool. Use
the special R410A
fl
are tool, or the conventional
fl
are tool. Leakage of refrigerant may
result if other
fl
are nuts are used.
(4) Protect the pipes by pinching them or with tape to prevent dust, dirt, or water from
entering the pipes.
Die
A
Pipe
B
L
Check if [L] is flared uniformly
and is not cracked or scratched.
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