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5.4. 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 floor.
(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 screw (large)
(Accessory, 8 pcs)
CAUTION
Install the wall-hook bracket both horizontally and vertically aligned.
Misaligned installation may cause water leakage.
5.5. Forming the drain hose and pipe
CAUTION
• Insert drain hose and drain cap securely. Drain should slope down to avoid water leakage.
• When inserting, be sure not to attach any material besides water. If any other material is
attached, it will cause deterioration and water leakage.
• After removing drain hose, be sure not to forget mounting drain cap.
• Be sure to fix the drain hose with tape to the bottom of piping.
• Prevent drain water freezing under low temperature environment.
When installing indoor unit’s drain hose outdoors, necessary measure for frost
protection should be taken to prevent drain water freezing.
Under low temperature environment (when outdoor temperature under 32 °F (0 °C)),
after cooling operation is executed, water in the drain hose could be frozen. Once drain
water is frozen, the drain hose will be blocked and water leakage may result 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.
Installation method of Drain cap
Use a hexagonal wrench 3/16 in. (4 mm) at opposite side
to insert the drain cap, till the drain cap contacts the tip of
drain cock.
No gap
Hexagonal
wrench
Drain
cock
Drain cap
Removal method of drain hose
Remove the screw at the left of drain
hose and pull out drain hose.
Installation method of drain hose
Vertically insert the drain hose toward the
inside, so that the drain fixture (white) can ac-
curately align with the screw hole around the
drain cock.
After inserting and before replacing, please
reinstall and fix the removed screws.
• Please hold around the joint of the drain hose during working.
• As the screw is inside, be sure to use screwdriver treated with magnet.
Screw
Drain fixture
Drain hose
Screw hole
Drain cock
Drain hose
Screw
Drain fixture
• 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 a bend radius of 4 in. (100 mm) or more and install no
more than 1-6/16 in. (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.
Unit: in. (mm)
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 fittings of the indoor unit to the 2
bottom hooks while lowering the unit and pushing it against the wall.
5.6. Flare connection (Pipe connection)
CAUTION
Tighten the flare nuts with a torque wrench using the specified tightening method. Oth-
erwise, the flare nuts could break after a prolonged period, causing refrigerant to leak
and generate hazardous gas if the refrigerant comes into contact with a flame.
5.6.1. Flaring
Use special pipe cutter and flare tool exclusive for R410A.
(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 flare nut (always use the flare nut attached to the indoor unit(s) and outdoor
unit respectively) onto the pipe and perform the flare processing with a flare tool. Use
the special R410A flare tool, or the conventional flare tool. Leakage of refrigerant may
result if other flare 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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